Patent Application
20240059080
The present application is based on, and claims priority from JP Application Serial Number 2022-131764, filed Aug. 22, 2022, JP Application Serial Number 2022-131751, filed Aug. 22, 2022, JP Application Serial Number 2022-174569, filed Oct. 31, 2022, and JP Application Serial Number 2022-174535, filed Oct. 31, 2022, the disclosure of which are hereby incorporated by reference herein in its entirety.
The present disclosure relates to a relay transport device that is disposed between a recording device and a feeding device and transports a medium. The present disclosure also relates to a recording system including the relay transport device.
In a recording device represented by a printer, a leading edge of a paper sheet, which is an example of a medium, contacts against a roller pair to correct skew of the paper sheet. In JP-A-2017-190214, there is shown a recording device in which a leading edge of a paper sheet contacts against an alignment roller pair to correct skew of the paper sheet.
Sometimes a recording system is configured with an independent external feeding device installed with respect to a recording device and medium is fed from the external feeding device to the recording device. In such a recording system, if the degree of skew is large when the medium is fed from the external feeding device, the skew may not be sufficiently corrected by the skew correction on the recording device side, and thus appropriate recording may not be executed.
In order to solve the above problem, the relay transport device of the present disclosure is a relay transport device that is positioned between a recording device, which performs recording on a medium, and a feeding device, which is disposed outside the recording device and which feeds the medium to the recording device, and that is configured to relay the medium fed from the feeding device and transport the medium to the recording device, the relay transport device including a first restriction section having a first restriction surface configured to position a first edge of the medium fed from the feeding device, the first edge being an edge in a width direction intersecting a transport direction; a transport section configured to transport the medium toward the first restriction surface in an intersecting direction, which intersects the transport direction and the width direction;
a first auxiliary guide disposed downstream of the first restriction section in the transport direction and having a first auxiliary guide surface configured to restrict a position of the first edge of the medium; and a second auxiliary guide disposed on an opposite side from the first auxiliary guide with the medium interposed therebetween and having a second auxiliary guide surface configured to restrict a position of a second edge of the medium on the opposite side from the first edge.
A recording system of the present disclosure includes the recording device, which performs recording on a medium; a feeding device, which is disposed outside the recording device and which feeds the medium to the recording device; and the relay transport device that is positioned between the recording device and a feeding device and that is configured to relay the medium fed from the feeding device and transport the medium to the recording device.
The present disclosure will be described in general terms.
The relay transport device according to the first aspect includes a relay transport device that is positioned between a recording device, which performs recording on a medium, and a feeding device, which is disposed outside the recording device and which feeds the medium to the recording device, and that is configured to relay the medium fed from the feeding device and transport the medium to the recording device, the relay transport device includes a first restriction section having a first restriction surface configured to position a first edge of the medium fed from the feeding device, the first edge being an edge in a width direction intersecting a transport direction; a transport section configured to transport the medium toward the first restriction surface in an intersecting direction, which intersects the transport direction and the width direction; a first auxiliary guide disposed downstream of the first restriction section in the transport direction and having a first auxiliary guide surface configured to restrict a position of the first edge of the medium; and a second auxiliary guide disposed on an opposite side from the first auxiliary guide with the medium interposed therebetween and having a second auxiliary guide surface configured to restrict a position of a second edge of the medium on the opposite side from the first edge.
According to the present aspect, even when the medium fed from the feeding device is skewed, the skew is corrected by the first edge of the medium contacting the first restriction surface in the relay transport device. Further, the position of the medium in the width direction is less likely to vary compared with a configuration in which the skew is corrected by bringing the leading edge of the medium into contact with the roller pair. Thus, appropriate recording can be performed in the recording device.
Since the medium of which the skew was corrected is supplied to the recording device in a state of being interposed between the first auxiliary guide and the second auxiliary guide in the width direction, skew feeding when the medium is supplied from the relay transport device to the recording device is suppressed, and the medium can be supplied to the recording device in a state in which the skew feeding correction effect in the relay transport device is appropriately maintained.
A second aspect is an aspect according to the first aspect, further includes a discharge roller pair that is disposed between the transport section and the first auxiliary guide and the second auxiliary guide in the transport direction and that is configured to discharge the medium toward the recording device.
According to the present aspect, in the configuration including the discharge roller pair, the operation and effect of the first aspect described above can be obtained.
A third aspect is an aspect according to the first aspect, wherein the first auxiliary guide includes, at an upstream end of the transport direction, a medium receiving section that widens in a direction away from the first edge with progression upstream in the transport direction.
According to the present aspect, the first auxiliary guide includes, at an upstream end of the transport direction, the medium receiving section that widens in the direction away from the first edge with progression upstream in the transport direction, it is possible to suppress the medium from being caught by the first auxiliary guide.
This aspect is not limited to the first aspect, and may be applied to the second aspect.
A fourth aspect is an aspect according to the third aspect, wherein the second auxiliary guide includes, at an upstream end of the transport direction, a medium receiving section that widens in a direction away from the second edge with progression upstream in the transport direction.
According to the aspect, since the second auxiliary guide includes, at the upstream end of the transport direction, the medium receiving section that widens in the direction away from the second edge with progression upstream in the transport direction, it is possible to suppress the medium from being caught by the second auxiliary guide.
A fifth aspect is an aspect according to the first aspect, wherein the first restriction section, the first auxiliary guide, and the second auxiliary guide are configured to move in the width direction.
According to the present aspect, since the first restriction section, the first auxiliary guide, and the second auxiliary guide are configured to move in the width direction, it is possible to appropriately correct skew in accordance with the medium size in the width direction.
This aspect is not limited to the first aspect, and may be applied to any of the second to fourth aspects.
A sixth aspect is an aspect according to the fifth aspect, wherein the first restriction section and the first auxiliary guide are configured to integrally move in the width direction.
According to the present aspect, since the first restriction section and the first auxiliary guide are configured to integrally move in the width direction, it is possible to prevent the first restriction section and the first auxiliary guide from being displaced in the width direction, and it is possible to suppress the medium from being caught on the first auxiliary guide when the medium moves from the first restriction section to the first auxiliary guide.
A seventh aspect is an aspect according to the first aspect, further includes a second restriction section disposed on the opposite side of the first restriction section with the medium interposed therebetween and having a second restriction surface configured to restrict a position of a second edge of the medium, wherein a distance between the first auxiliary guide surface and the second auxiliary guide surface in the width direction is shorter than a distance between the first restriction surface and the second restriction surface.
The medium is moved to the side of the first restriction section by the transport section. However, as an example, when the medium rotates so that the downstream end of the first edge is separated from the first restriction surface, there is a concern that the correction of the skew cannot be performed even when the medium is transported by a distance which can be transported by the transport section. Note that this is merely an example, and there are cases where the medium may move a direction away from the first restriction surface without being rotated as described above. However, according to the present aspect, since the second restriction section configured to restrict the position of the second edge of the medium on the opposite side from the first edge of the medium is provided, it is possible to suppress the occurrence of the defects described above.
In addition, according to the present aspect, since the distance between the first auxiliary guide surface and the second auxiliary guide surface in the width direction is shorter than the distance between the first restriction surface and the second restriction surface, it is possible to appropriately suppress skew when the medium is supplied from the relay transport device to the recording device. This aspect is not limited to the first aspect, and may be applied to any of the second to sixth aspects.
An eighth aspect is an aspect according to the first aspect, further includes a paddle configured to move the medium toward the first restriction section by rotating.
According to the present aspect, since the paddle the paddle configured to move the medium toward the first restriction section by rotating, it is possible to more appropriately correct the skew of the medium.
A recording system according to a ninth aspect includes a recording device for recording on a medium; a feeding device disposed outside the recording device and configured to feed the medium to the recording device; and the relay transport device according to any one of the first to eighth aspects, the relay transport device being positioned between the recording device and the feeding device and configured to relay and transport the medium fed from the feeding device to the recording device.
According to the present aspect, in the recording system, the operational effects of any one of the first to eighth aspects can be obtained.
Hereinafter, the present disclosure will be specifically described.
Hereinafter, a recording system 1, a medium supplying system 2, and a relay transport device 4 according to an embodiment of the present disclosure will be described.
In each drawing, an X-axis direction is a depth direction of each device, and is a width direction of a medium represented by a recording sheet. Among the X-axis directions, the +X direction is a direction from the device rear surface toward the device front surface, and the −X direction is a direction from the device front surface toward the device rear surface.
The Y-axis direction is the apparatus width direction of each device, and among the Y-axis directions, the +Y direction is the left direction as viewed from a user facing the device front surface, and the −Y direction is the right direction. The +Y direction is a transport direction of the medium in the relay transport device 4.
A Z-axis direction is a device height direction of each device and is a vertical direction, a +Z direction is a vertically upward direction, and a −Z direction is a vertically downward direction. In the following description, the +Z direction may be simply referred to as upward, and the −Z direction may be simply referred to as downward.
Hereinafter, a direction in which the medium is transported may be referred to as a transport direction or downstream of the transport direction, and a direction opposite to the transport direction 8 may be referred to as upstream of the transport direction.
In
In
The recording device 3, the relay transport device 4, and the feeding device 5 are independent devices, and are arranged side by side along the Y-axis direction on the installation surface G.
The recording device 3 is configured as an inkjet printer that performs recording by ejecting ink, which is an example of liquid, onto the medium, and includes a line head 105, which is an example of a recording section. Further, the recording device 3 is a so-called multifunction device including an image reading device 102 in an upper section of the device. However, the recording device 3 is not limited to an inkjet printer, and may be a device that performs recording by another method such as a laser printer, a thermal transfer printer, or a dot impact printer.
The recording device 3 is provided with a medium accommodation section 101 for accommodating the medium to be fed in a lower portion of a device main body 100, which is provided with the line head 105. The medium accommodation section 101 includes a plurality of medium accommodation cassettes along the vertical direction.
The device main body 100 includes a plurality of transport roller pairs (not shown) for transporting the medium, and the medium on which recording has been performed by the line head 105 is discharged to an in-body discharge section 103 and stacked on a discharge tray 104.
The device main body 100 is provided with a control section 111 for controlling the entire recording system 1. The control section 111 includes a CPU (not shown), a nonvolatile memory, and the like, and all the controls executed in the recording system 1 are realized by executing a control program held in the nonvolatile memory.
In the present embodiment, the control section 111 is provided in the recording device 3 and controls the relay transport device 4 connected to the recording device 3 and the feeding device 5 connected to the relay transport device 4. However, the relay transport device 4 and the feeding device 5 may include a control section for controlling each device, and the control section 111 of the recording device 3, the control section (not shown) of the relay transport device 4, and the control section (not shown) of the feeding device 5 may transport the medium in cooperation with each other.
The recording device 3 includes a feed roller 107 and a separation roller 108 as receiving rollers on the right side section of the device main body 100, and is configured to be able to receive a medium from the right side section of the device main body 100. The feed roller 107 is disposed at a predetermined height from the installation surface G. The relay transport device 4 (to be described later) supplies the medium to the feed roller 107.
In a case where the medium is received from the right side section of the device main body 100, the medium is sent to the registration roller pair 109 by the rotation of the feed roller 107 while being subjected to a separation action by the separation roller 108. At this time, the leading edge of the medium contacts against the registration roller pair 109 and a bend is formed in the medium between the registration roller pair 109 and the feed roller 107, and by this, the leading edge of the medium aligns with the registration roller pair 109 and skew is corrected.
Note that a feed tray (not shown) is pivotably provided on the right side surface of the device main body 100, and in a case where the relay transport device 4 (to be described later) is not installed, the medium can be placed on the feed tray, and the medium placed on the feed tray can be fed by the feed roller 107. When the relay transport device 4 (to be described later) is used, the feeding tray is removed and the relay transport device 4 is installed. The feed tray is provided so as to be able to take on a closed state, in which a right side surface of the device main body 100 is formed by pivoting, and an open state, in which the medium can be placed thereon, and since it is positioned at a position where it does not interfere with the relay transport device 4 in the open state, it is not always necessary to remove the feed tray when the relay transport device 4 (to be described later) is installed.
The relay transport device 4 is an apparatus that is positioned between the recording device 3 and the feeding device 5, which is arranged outside the recording device 3 and feeds the medium to the recording device 3, and that relays and transports the medium fed from the feeding device 5 to the feed roller 107 of the recording device 3.
The medium is supplied from the feeding device 5 to the relay transport device 4, and is transported to the feed roller 107 via the transport path Tk of the relay transport device 4. As will be described in detail later, skew of the medium is corrected in the transport path Tk.
The relay transport device 4 is placed on an installation base 6 so that a position at which the medium is supplied to the recording device 3 in the vertical direction matches the feed roller 107. A space 6a for allowing an opening and closing body 110, which is provided on the right side surface of the recording device 3, to open and close is formed on the lower side of the installation base 6. Accordingly, it is possible to prevent the installation base 6 from obstructing the opening and closing of the opening and closing body 110.
The opening and closing body 110 forms a part of the right side surface of the device main body 100, can open as indicated by a reference symbol 110-1 and two dot chain line, and can open the transport path of the medium from the medium accommodation section 101 to the device main body 100 by opening.
Next, a basic configuration of the relay transport device 4 will be described with reference to
The relay transport device 4 includes a first restriction section 31 having a first restriction surface 31a that positions a first edge Ps1, which is one edge (edge in the +X direction) in the width direction of the medium supplied from the feeding device 5, and a transport section 10 that transports the medium toward the first restriction surface 31a in an intersecting direction D, which intersects the +Y direction, which is the transport direction, and the X-axis direction, which is the width direction.
In
The first restriction surface 31a can contact against the first edge Ps1 of the medium, is parallel to the Y-axis direction, and extends along the Y-axis direction.
The first restriction section 31 is provided so as to be displaceable in the X-axis direction, that is, in the width direction of the medium while being guided by a guide section (not shown). In the present embodiment, the displacement of the first restriction section 31 in the width direction is performed by a manual operation of the user. However, it goes without saying that the displacement of the first restriction section 31 in the width direction may be performed by power of a motor or the like.
In the present embodiment, the transport section 10 includes a first transport section 11 and a second transport section 12 disposed downstream of the first transport section 11.
In the present embodiment, the transport section 10 includes the first transport section 11 and the second transport section 12, that is, includes a plurality of transport sections, but may be configured with one transport section.
A direction in which the first transport section 11 transports the medium toward the first restriction section 31 is referred to as a first direction D1, and a direction in which the second transport section 12 transports the medium toward the first restriction section 31 is referred to as a second direction D2. The first direction D1 and the second direction D2 are both examples of the intersecting direction D. In the present embodiment, the second direction D2 is a direction along the first direction D1.
In the present embodiment, the basic configurations of the first transport section 11 and the second transport section 12 are the same, and each of the transport sections is provided with a belt unit 13 on a rotary table 14. The belt unit 13 includes a transport belt 15. However, hereinafter, the transport belt 15 included in the first transport section 11 may be referred to as a first transport belt 15A as necessary, and the transport belt 15 included in the second transport section 12 may be referred to as a second transport belt 15B as necessary.
The rotary table 14 supports the transported medium from below. The rotary table 14 is rotatable in a clockwise direction and a counterclockwise direction in
In the present embodiment, the transport belt 15 is provided upstream in the transport direction with respect to the rotation shaft 14a of the rotary table 14. Said differently, “the transport belt 15 is provided upstream in the transport direction with respect to the rotation shaft 14a” is a situation where the rotation shaft 14a is positioned downstream with respect to the center of the transport belt 15 in the transport direction, and “the rotation shaft 14a is positioned downstream with respect to the center of the transport belt 15 in the transport direction” means that the axial center position of the rotation shaft 14a is positioned downstream of the center position of the transport belt 15 in the transport direction.
The rotation of the rotary table 14 about the rotation shaft 14a is performed by the user operation in the present embodiment, but may be performed by, for example, a motor (not shown). The motor for rotating the rotary table 14 can be controlled by the control section 111 (see
The belt unit 13 includes a transport belt 15, and is configured to suck and transport the medium to the transport belt 15. More specifically, as shown in
Note that the belt drive motor (not shown) may be provided for each of the first transport section 11 and the second transport section 12, or the first transport section 11 and the second transport section 12 may be driven by one belt drive motor.
The driven pulley 16c is supported by a pulley support member 21. The pulley support member 21 is provided so as to be rotatable in the clockwise direction and the counterclockwise direction in
A suction blower 18, which is an example of a suction section, is provided inside the transport belt 15. The suction blower 18 applies a negative pressure to the pressure chamber 19.
A suction plate 20 is provided above the pressure chamber 19. The suction plate 20 supports the transport belt 15 between the driven pulley 16b and the drive pulley 16a. A plurality of openings 20a are formed in the suction plate 20 as shown in
A plurality of through holes 15a are formed in the transport belt 15 as shown in
The suction blower 18, which is an example of a suction section, is provided in each of the first transport section 11 and the second transport section 12 in the present embodiment. That is, since separate suction sections are provided for the first transport belt 15A and the second transport belt 15B, independent suction control can be performed for the first transport belt 15A and the second transport belt 15B.
However, instead of such a configuration, a single suction blower 18 may be used for the first transport section 11 and the second transport section 12.
As shown in
In the present embodiment, the upper restriction section 38 includes a plurality of upper restriction members 39 along the transport direction. Support members 41 are provided on both sides of each upper restriction member 39 in the transport direction, and the upper restriction members 39 are provided rotatably with respect to the support members 41 via a rotation shaft 40. The upper restriction members 39 are rotatably provided as viewed from the transport direction, and are provided so as to be able to advance toward and retreat from the medium by rotating. The upper restriction members 39 are pressed by a pressing member (not shown), for example, a spring, in a counterclockwise direction in
As shown in
In the present embodiment, one pair of the transport roller pair 25 is provided in the width direction as shown in
That is, the transport roller pair 25 applies a transport force to the medium in the transport direction, but since a transport force in the intersecting direction D, which intersects the transport direction and the width direction is applied to the medium in the transport section 10 downstream, the transport force by the transport roller pair 25 and the transport force by the transport section 10 are simultaneously applied to the medium, and damage such as wrinkles may occur in the medium. However, the configuration in which one transport roller pair 25 is provided in the width direction as in the present embodiment is suitable from the viewpoint that the medium is easily rotated and damage to the medium is suppressed.
Further, as shown in
In this embodiment, a plurality of discharge roller pairs 26 are provided in the width direction as shown in
The drive motor serving as a driving source of the drive roller 26a may be the same as or different from the drive roller 25a of the transport roller pair 25.
It is desirable that a medium transport speed in the +Y direction by the transport section 10 is higher than a medium transport speed in the +Y direction by the transport roller pair 25 so that the medium does not become loose between the transport roller pair 25 and the transport section 10. Similarly, it is desirable that a medium transport speed in the +Y direction by the discharge roller pair 26 is higher than the medium transport speed in the +Y direction by the transport section 10 so that the medium does not become loose between the transport section 10 and the discharge roller pair 26.
Similarly, it is desirable that a medium transport speed in the +Y direction by the feed roller 107 is higher than the medium transport speed in the +Y direction by the discharge roller pair 26 so that the medium does not become loose between the feed roller 107 and the discharge roller pair 26 of the recording device 3.
In the present embodiment, as shown in
In the present embodiment, the relay transport device 4 is provided with a first auxiliary guide 33, which is disposed downstream of the first restriction section 31 in the transport direction and which can restrict the position of the first edge Ps1 of the medium, and a second auxiliary guide 35, which is disposed on the opposite side from the first auxiliary guide 33 with the medium interposed therebetween and which can restrict the position of the second edge Ps2 of the medium.
The first auxiliary guide 33 includes a first auxiliary guide surface 33a that restricts the position of the first edge Ps1 of the medium. Further, the second auxiliary guide 35 includes a second auxiliary guide surface 35a that restricts the position of the second edge Ps2 of the medium. The first auxiliary guide surface 33a and the second auxiliary guide surface 35a extend along the transport direction.
The first auxiliary guide 33 and the second auxiliary guide 35 are positioned above a medium support section 112 constituting the recording device 3, and are provided so as to be displaceable in a direction approaching each other or separating from each other along the width direction via a rack and pinion mechanism (not shown). The medium support section 112 supports the medium at the position of the feed roller 107 in the medium transport path.
In the present embodiment, the first auxiliary guide 33 is connected to the first restriction section 31 via a connecting section (not shown), and when the first restriction section 31 is displaced in the width direction, the first auxiliary guide 33 is also displaced integrally in the width direction. In conjunction with the displacement of the first auxiliary guide 33, the second auxiliary guide 35 is also displaced in the width direction.
The distance U5 between the first auxiliary guide surface 33a and the second auxiliary guide surface 35a in the width direction is shorter than the distance (U3+U4) between the first restriction surface 31a and the second restriction surface 32a.
The first auxiliary guide 33 includes, at an upstream end in the transport direction, a medium receiving section 34 that widens in a direction (+X direction) away from the first edge Ps1 of the medium with progression upstream in the transport direction. The second auxiliary guide 35 includes, at the upstream end in the transport direction, a medium receiving section 36 that widens in a direction (−X direction) away from the second edge Ps2 of the medium with progression upstream in the transport direction.
Next, the feeding device 5 includes a stacking section 60 on which the medium is stacked, and a feed roller 63 as a feeding section that feeds the medium from the stacking section 60. A reference symbol P-1 indicates an example of the medium stacked on the stacking section 60. As shown in
As shown in
The first feeding guide 61 and the second feeding guide 62 are provided displaceable in a direction of approaching each other or separating from each other along the width direction via a rack and pinion mechanism (not shown). The user who sets the medium on the stacking section 60 can displace the first feeding guide 61 and the second feeding guide 62 to a position suitable for a medium size by operating the first feeding guide 61, for example.
The feed roller 63 is driven in the clockwise direction of
The feed roller 63 is disposed at a second center position X51 (to be described later) in the width direction.
In
The distance U2 between the second center position X51 and the first restriction surface 31a in the width direction is longer than the distance U1 between the first center position X43 and the first restriction surface 31a.
The position X41 changes according to the width direction medium size, but the first center position X43 is positioned in the +X direction from the second center position X51 regardless of the width direction medium size.
Since the relay transport device 4 includes the first restriction section 31 having the first restriction surface 31a for positioning the first edge Ps1 of the medium fed from the feeding device 5 and the transport section 10 for transporting the medium in the intersecting direction D toward the first restriction surface 31a, even if the medium fed from the feeding device 5 is skewed, the skew is corrected by the first edge Ps1 contacting the first restriction surface 31a by the transport section 10. The medium P-2, which is skewed when supplied from the feeding device 5 to the relay transport device 4, receives transport force in the intersecting direction D from the transport section 10, the first edge Ps1 contacts on the first restriction surface 31a, and the first edge Ps1 enters a state of being aligned with the first restriction surface 31a, and thus, the skew of the medium is corrected as indicated by reference symbol P-3. Further, by such correction of skew, the position of the medium in the width direction becomes less likely to vary compared with a configuration in which the skew is corrected by bringing the leading edge of the medium into contact with the roller pair. As described above, appropriate recording can be performed in the recording device 3.
The recording device 3 is provided with the registration roller pair 109 for performing skew correction by bringing the leading edge of the medium supplied from the relay transport device 4 into contact therewith, and skew correction is performed by different means between the recording device 3 and the relay transport device 4, and the skew of the medium is appropriately corrected. In other words, it may be difficult to align the position of the medium in the width direction only by the registration roller pair 109 provided in the recording device 3, and the skew of the medium is appropriately corrected by the skew correction in the relay transport device 4.
In the present embodiment, since the transport belt 15 is configured to suck and transport the medium and bring the medium into contact with the first restriction section 31, the medium is easily rotated compared to a configuration in which the medium is nipped and transported by the roller pair, and thus it is possible to appropriately correct the skew of the medium.
In the present embodiment, the medium is sucked against the transport belt 15 by air, but the medium may caused to electrostatically cling to the transport belt 15.
Further, in the present embodiment, since the skew of the medium is corrected by at least two transport belts of the first transport belt 15A and the second transport belt 15B, the transport distance to correct the skew of the medium can be secured, and the skew of the medium can be appropriately corrected.
If the transport distance for correcting the skew of the medium were to be secured by one transport belt, then the distance in the widthwise direction between the first restriction surface 31a and the transport belt would be long upstream in the transport direction, and the force for pressing the first edge Ps1 against the first restriction surface 31a would be weak. If the inclination angle of the transport belt with respect to the transport direction were made small in order to suppress such a problem, the effect of correcting the skew would be reduced, so that the transport distance would need to be lengthened, resulting in an increase in the size of the device. However, by correcting the skew of the medium using at least two transport belts, i.e., the first transport belt 15A and the second transport belt 15B, the first edge Ps1 can be appropriately pressed against the first restriction surface 31a, thereby suppressing an increase in the size of the device.
It goes without saying that three or more transport belts may be provided along the transport direction.
In the present embodiment, it is possible to stably transport the medium because the second direction D2, which is the direction in which the second transport section 12 transports the medium toward the first restriction section 31, is a direction along the first direction D1, which is the direction in which the first transport section 11 transports the medium toward the first restriction section 31.
In the present embodiment, since the first direction D1 and the second direction D2 can be changed, appropriate skew correction can be performed.
In addition, in the present embodiment, since the first restriction section 31 is movable in the width direction, it is possible to correct the skew of a plurality of types of medium having different sizes in the width direction.
In addition, in the present embodiment, since the rotary table 14, that is, the transport belt 15 can change the intersecting direction D by the rotation of the rotation shaft 14a, it is possible to perform more appropriate skew correction by changing the intersecting direction according to the quality of the skew correction of the medium.
The rotation of the transport belt 15 around the rotation shaft 14a may be performed by a power of the motor (not shown) under the control of the control section 111 (see
As described above, when the transport force in the +Y direction by the transport roller pair 25 and the transport force in the intersecting direction D by the transport section 10 are applied to the medium at the same time, the medium may be damaged such as by wrinkling. Therefore, the angle formed by the transport direction (Y-axis direction) and the intersecting direction D may be made smaller in accordance with longer length of the medium in the transport direction.
The crossing direction D may be changed during transport of the medium, and for example, the angle formed by the transport direction (Y-axis direction) and the intersecting direction D may be increased as the transport of the medium proceeds. This makes it possible to appropriately correct the skew while suppressing the above described damage.
In the present embodiment, since the rotation center of the transport belt 15 is downstream of the transport belt 15 in the transport direction, the following operational effects are obtained. Hereinafter, this operation and effect will be described below with reference to
However, in the present embodiment, the rotation center Ra of the transport belt 15 is positioned downstream of the transport belt 15 in the transport direction, so the swing range of the downstream end when the transport belt 15 rotates can be made narrower than the swing range of the upstream end, thereby making it difficult for the downstream end of the transport belt 15 to interfere with the first restriction section 31 as shown in
In the present embodiment, the second restriction section 32 having the second restriction surface 32a capable of restricting the position of the second edge Ps2 of the medium is provided. As a result, the following effects can be obtained. That is, the medium is moved to the side of the first restriction surface 31a by the transport belt 15. However, as an example, when the medium rotates so that the downstream end of the first edge Ps1 is separated from the first restriction surface 31a, there is a concern that the correction of the skew cannot be performed even when the medium is transported by a distance transportable by the transport belt 15. Note that this is merely an example, and there are cases where the medium may move in a direction away from the first restriction surface 31a without being rotated as described above. The movement of the medium in the direction away from the first restriction surface 31a can also be caused by the medium receiving a reaction force from the first restriction surface 31a when contacting the first restriction surface 31a. However, in the present embodiment, since the second restriction section 32 capable of restricting the position of the second edge Ps2 of the medium is provided, it is possible to suppress the occurrence of the defects described above.
Further, in the present embodiment, as shown in
Although the position X41 varies depending on the size of the medium in the width direction, the position of the second restriction section 32 in the width direction is set such that the second distance U4 is longer than the first distance U3 even when the widest medium recordable by the recording device 3 is transported.
In the present embodiment, since the upper restriction members 39 (upper restriction surface 39a) are provided as the upper restriction section 38 which restricts the upward movement of the medium, the following operation and effect are obtained. That is, in case where the first edge Ps1 of the medium comes into contact with the first restriction surface 31a, if the medium deforms, the medium will not rotate, and there is a concern that the skew of the medium cannot be appropriately corrected, and there is also a concern that a jam occurs. In
However, in the present embodiment, since the upper restriction surface 39a which restricts the upward movement of the medium is provided, the first edge Ps1 can appropriately come into contact with the first restriction surface 31a as in the medium indicated by the reference symbol Pj-1, and thus the skew can be corrected by appropriately rotating the medium.
Since the upper restriction members 39 forming the upper restriction surface 39a are rotatably provided so that the upper restriction surface 39a can advance toward and retreat from the medium, it is possible to suppress damage from being formed on the medium due to the upper restriction members 39 rotating when receiving a strong reaction force from the medium. The upper restriction members 39 are pressed by a pressing member (not shown), for example, a spring, in a direction in which the upper restriction surface 39a advances toward the medium. Accordingly, it is possible to suppress the upper restriction members 39 from being easily rotated when the upper restriction members 39 receive the reaction force from the medium, and thus it is possible to appropriately correct the skew of the medium.
In the present embodiment, since the plurality of upper restriction members 39 are provided along the transport direction, it is possible to restrict the upward movement of the medium in a wider range along the transport direction.
Since the plurality of upper restriction members 39 are provided along the transport direction, even in a case where the degree of upward movement of the medium different depends on the position in the transport direction, the upper restriction surface 39a can be displaced according to the position in the transport direction, and thus it is possible to suppress damage from being formed on the medium due to the medium coming into strong contact with the upper restriction surface 39a.
From the viewpoint of suppressing excessive pressing of the medium, it is desirable that the upper restriction members 39 form a predetermined gap between the upper restriction members 39 and the rotary table 14 that supports the medium from below, and can maintain the state. It is desirable that the predetermined gap is, for example, a value obtained by adding a predetermined margin to the maximum value of the thickness of the medium per sheet.
Further, the upper restriction members 39 may have a fixed structure which does not advance toward and retreat from the medium. Further, when the plurality of upper restriction members 39 are provided along the transport direction, the predetermined gap may be different among the plurality of upper restriction members 39. For example, the predetermined gap may be made smaller downstream where the skew of the medium is corrected than upstream.
Further, instead of the configuration in which the plurality of upper restriction members 39 are provided at appropriate intervals along the transport direction, one upper restriction member extending along the transport direction may be used.
In this embodiment, as shown in
In the present embodiment, the first feeding guide 61 and the second feeding guide 62 are members which are displaced by the user according to the size of the medium in the width direction, and the first restriction section 31 is also a member which is displaced by the user according to the size of the medium in the width direction. Therefore, in the present embodiment, the first feeding guide 61 and the first restriction section 31 are connected to each other by a connecting member (not shown) so that the distance U2 is longer than the distance U1, and the first feeding guide 61 and the first restriction section 31 are configured to be integrally displaced. However, even when the first feeding guide 61 and the first restriction section 31 are not connected by the connecting member (not shown), the distance U2 can be made longer than the distance U1 if, as an example, the movable region of the first feeding guide 61 is set in the −X direction with respect to the movable region of the first restriction section 31.
In a configuration in which the first feeding guide 61 and the first restriction section 31 are not connected, a detection member for detecting the position of the first restriction section 31 in the width direction and a detection member for detecting the position of the first feeding guide 61 in the width direction are provided, and when the distance U2 is equal to or less than the distance U1 based on the detection information of the two detection members, the control section 111 (see
In a case where the first restriction section 31 is configured to be displaced by the power of a motor (not shown) under a control of the control section 111 (refer to
In the present embodiment, the feed roller 63, which is the feeding section of the feeding device 5, can feed the medium by coming into contact with the second center position X51 of the medium in the width direction. Accordingly, it is possible to suppress skew of the medium which is fed from the feeding device 5.
In the present embodiment, the feeding device 5 includes the first feeding guide 61 which positions the first edge Ps1 of the medium, and the first feeding guide surface 61a of the first feeding guide 61 is positioned between the first restriction surface 31a of the first restriction section 31 and the first center position X43 in the width direction. Accordingly, it is possible to suppress the position of the first edge Ps1 of the medium (P-1) fed from the feeding device 5 from being close to the first restriction section 31, and it is possible to suppress the medium from being caught on the first restriction section 31 when the medium is supplied from the feeding device 5 to the relay transport device 4.
The distance between the first restriction surface 31a and the first feeding guide surface 61a in the width direction does not become longer than necessary, and the medium can appropriately contact the first restriction section 31 after being supplied from the feeding device 5 to the relay transport device 4, and thus the skew of the medium can be appropriately corrected.
In the present embodiment, since the feeding device 5 is further provided with the second feeding guide 62 having the second feeding guide surface 62a which can restrict the position of the second edge Ps2 of the medium, it is possible to suppress skew of the medium fed from the feeding device 5. In
Note that even in a configuration in which the first feeding guide 61 and the second feeding guide 62 are not provided, the medium can be sent out from the stacking section 60 as long as the stacking section 60 and the feed roller 63 are provided.
In the present embodiment, the medium of which the skew was corrected by the first restriction section 31 is supplied to the recording device 3 in a state of being interposed between the first auxiliary guide 33 and the second auxiliary guide 35 in the width direction. Thus, skew of the medium when the medium is supplied from the relay transport device 4 to the recording device 3 is suppressed, and the medium can be supplied to the recording device 3 in a state in which the skew correction effect in the relay transport device 4 is appropriately maintained.
In the present embodiment, since the first auxiliary guide 33 includes the medium receiving section 34 at the upstream end in the transport direction, it is possible to suppress the medium from being caught on the first auxiliary guide 33. Since the second auxiliary guide 35 includes the medium receiving section 36 at the upstream end in the transport direction, it is possible to suppress the medium from being caught on the second auxiliary guide 35.
In the present embodiment, the first restriction section 31, the first auxiliary guide 33, and the second auxiliary guide 35 are movable in the width direction. Accordingly, the skew can be appropriately corrected in accordance with the medium size in the width direction.
The first restriction section 31 and the first auxiliary guide 33 are integrally movable in the width direction. Thus, it is possible to prevent the first restriction section 31 and the first auxiliary guide 33 from being displaced in the width direction, and it is possible to suppress the medium from being caught on the first auxiliary guide 33 when the medium moves from the first restriction section 31 to the first auxiliary guide 33.
However, the first restriction section 31 and the first auxiliary guide 33 are not limited to being integrated, and may be separate bodies.
In the present embodiment, the distance U5 between the first auxiliary guide surface 33a and the second auxiliary guide surface 35a in the width direction is shorter than the distance (U3+U4) between the first restriction surface 31a and the second restriction surface 32a. Accordingly, it is possible to suitably suppress skew when the medium is supplied from the relay transport device 4 to the recording device 3.
The above described relay transport device 4 can be modified into the following Modification example 1 to Modification example 13. The modifications described below may be combined in any manner as long as there is no technical contradiction.
In the above described embodiment, displacement of the first restriction section 31 in the width direction is performed by a manual operation of the user. However, for example, a configuration may be adopted in which the first restriction section 31 is displaced in the width direction using a rack and pinion mechanism (not shown) driven by a motor (not shown). The motor for displacing the first restriction section 31 can be controlled by the control section 111 (see
The transport belt 15 may be configured to be movable in the width direction in conjunction with the movement of the first restriction section 31. For example, in the above described embodiment, by integrally configuring the transport section 10 and the first restriction section 31, it is possible to move the transport belt 15 in the width direction in conjunction with the movement of the first restriction section 31.
As a result, the following effects can be obtained. That is, when the distance between the transport belt 15 and the first restriction surface 31a in the width direction is long, there is a possibility that the first edge Ps1 of the medium cannot be appropriately brought into contact with the first restriction surface 31a by the transport belt 15. On the other hand, when the distance between the transport belt 15 and the first restriction surface 31a in the width direction is short, in a case where the medium has a large size in the width direction, then a region which deviates from the transport belt 15 in the −X direction increases, and as a result, there is a concern that the medium cannot be appropriately transported. Therefore, in order to appropriately transport the medium while appropriately correcting the skew of the medium, the distance between the transport belt 15 and the first restriction surface 31a in the width direction is important. However, by making the transport belt 15 movable in the width direction in conjunction with the movement of the first restriction section 31, it is possible to appropriately maintain the distance between the transport belt 15 and the first restriction surface 31a in the width direction, and thus it is possible to appropriately correct the skew of the medium and appropriately transport the medium.
A plurality of transport belts 15 may be provided in the width direction.
In a case where the plurality of transport belts 15 are provided in the width direction, the suction force for sucking the medium by each transport belt 15 may be set to be weaker.
In
More specifically, the second distance U4 is desirably as short as possible in order to appropriately correct the skew of the medium, because the distance in the transport direction in which the medium can be transported by the transport belt 15 is limited. However, if the second distance U4 is shortened, the medium cannot be appropriately received when the degree of skew of the medium received from the feeding device 5 is large. Therefore, it is possible to perform more appropriate skew correction by adjusting the difference between the first distance U3 and the second distance U4 according to the skew of the medium received from the feeding device 5.
The movement of the second restriction section 32, that is, the change of the second distance U4 may be manually performed by the user or may be automatically performed. In a case where the second distance U4 is automatically changed, for example, it is possible to adopt a configuration in which the second restriction section 32 is displaced in the width direction by a rack and pinion mechanism (not shown) operated by a motor (not shown), and the control section 111 (refer to
The suction force of the medium by the transport belt 15 in the first region may be weaker than the suction force in the second region downstream of the first region in the transport direction.
For example, the suction plate 20A shown in
The change of the suction force is not limited to the above described means, and any means may be used as long as the suction force per unit area of the transport belt 15 is made different between the first region Ar1 and the second region Ar2. For example, the suction blowers 18 may be provided for the first region Ar1 and the second region Ar2, and the suction forces may be made different from each other by adjusting the rotational speeds of the suction blowers 18. Further, the suction force may be varied by adjusting the size of the openings 20a (see
In the configuration in which the transport roller pair 25 for transporting the medium to the first transport belt 15A is provided upstream of the first transport belt 15A in the transport direction as in the present embodiment, the suction force of the medium by the first transport belt 15A, or the suction force of the medium by the first transport belt 15A and the suction force of the medium by the second transport belt 15B, may be changeable.
That is, in a case where the transport roller pair 25 is provided upstream of the first transport belt 15A in the transport direction, it is difficult for the medium to rotate while the medium is nipped by the transport roller pair 25, and there is a concern that damage such as wrinkling will occur in the medium due to the restraining action of the transport roller pair 25 and the rotating action of the first transport belt 15A being simultaneously applied to the medium. Depending on the length of the medium in the transport direction, the rotating action of the second transport belt 15B may be applied at the same time, which may cause the damage.
Therefore, by making it possible to change the suction force applied to the medium by the first transport belt 15A, or the suction force applied to the medium by the first transport belt 15A and the suction force applied to the medium by the second transport belt 15B, it is possible to weaken the suction force applied to the medium by the first transport belt 15A, or the suction force applied to the medium by the first transport belt 15A and the suction force applied to the medium by the second transport belt 15B, when there is a risk of damage as described above, and thus it is possible to suppress the damage described above.
The suction force can be adjusted by adjusting the rotational speed of the suction blower 18. The adjustment of the suction force may be performed by the user through an operation panel (not shown), or may be automatically performed under the control of the control section 111 (see
For example, since the damage as described above is more likely to occur the longer that the length of the medium is in the transport direction, it is desirable to make the suction force weaker according to the length of the medium in the transport direction, that is, as the length of the medium is longer. For example, when there is a first medium and a second medium whose length in the transport direction is longer than that of the first medium, a first suction force is used when the first medium is transported, and a second suction force weaker than the first suction force is used when the second medium is transported. Since such damage is more likely to occur as the rigidity of the medium is lower, when there is the first medium and the second medium having a rigidity lower than that of the first medium, the first suction force is used when the first medium is transported, and the second suction force weaker than the first suction force is used when the second medium is transported.
In this case, both the first transport belt 15A and the second transport belt 15B may be used as the second suction force, or only the first transport belt 15A may be used as the second suction force. Further, the second suction force may be applied only to the upstream section of the first transport belt 15A.
The suction force may be set to the second suction force until a trailing edge of the second medium in the transport direction passes through the transport roller pair 25, and the suction force may be set to the first suction force when the trailing edge of the second medium in the transport direction passes through the transport roller pair 25.
Regardless of the length of the medium, it is also desirable that the suction force of the medium by the first transport belt 15A be made weaker than the suction force of the medium by the second transport belt 15B. By this, the medium rotates more easily in the region of the first transport belt 15A where there is a high need for skew correction, than in the region of the second transport belt 15B, and skew correction can be performed appropriately. In the region of the second transport belt 15B where the medium is to be reliably delivered to the discharge roller pair 26, the medium is less likely to rotate than in the region of the first transport belt 15A, but the transport force is large, and the medium can be appropriately delivered to the discharge roller pair 26.
In a configuration in which the transport roller pair 25 that transports the medium to the first transport belt 15A is provided upstream in the transport direction with respect to the first transport belt 15A as in the present embodiment, the transport roller pair 25 may be configured to be switchable between the nip state in which the transport roller pair 25 nips the medium and the nip release state in which the transport roller pair 25 releases the nip, and in this case, the transport roller pair 25 may be switched to the nip release state after a part of the medium transported by the transport roller pair 25 in the nip state is sucked by the first transport belt 15A.
After a part of the medium transported by the transport roller pair 25 in the nip state as shown in
That is, it is difficult for the medium to rotate while the medium is nipped by the transport roller pair 25, and there is a concern that damage such as wrinkling will occur in the medium due to the restraining action of the transport roller pair 25 and the rotating action of the first transport belt 15A being simultaneously applied to the medium.
However, since the transport roller pair 25 is switched to the nip release state after a part of the medium transported by the transport roller pair 25 in the nip state is sucked to the first transport belt 15A, it is possible to shorten a period in which the restraining action by the transport roller pair 25 and the rotating action by the first transport belt 15A are simultaneously applied to the medium, and it is possible to suppress the damage as described above.
As shown in
The solenoid 46 can be engaged with the support member 45, and in the nip state of the transport roller pair 25 shown in
The solenoid 46 is controlled by the control section 111 (see
The timing of switching the transport roller pair 25 from the nip state to the nip release state may be changed according to type of the medium. For example, since in a case where the rigidity of the medium is high, the above described damage is less likely to occur than in a case where the rigidity is relatively low, in the case of the medium having high rigidity, the timing of switching the transport roller pair 25 from the nip state to the nip release state may be delayed. As a result, the medium can be reliably transported downstream by the transport roller pair 25.
After a part of the medium transported by the transport roller pair 25 in the nip state is sucked to the first transport belt 15A, it is desirable that the restraint of the medium by the feed roller 63 of the feeding device 5 is released when the transport roller pair 25 is switched to the nip release state. This is because when the medium is restrained by the feed roller 63 of the feeding device 5, the medium is difficult to rotate, and there is a concern that damage such as wrinkles described above may occur.
Here, the state in which “the restraint of the medium by the feed roller 63 is released” means a state, such as a state in which the feed roller 63 is not in contact with the medium, in which the above described damage is unlikely to occur in the medium due to force received from the feed roller 63 when the medium is about to rotate due to the action of the first transport belt 15A. Therefore, in a case where the feed roller 63 can be switched between a state of being in contact with the medium stacked on the stacking section 60 and a state of being separated from the medium stacked on the stacking section 60, it is desirable to separate the feed roller 63 from the medium when the leading edge of the medium is nipped by the transport roller pair 25.
Regarding the first direction D1 by the first transport belt 15A and the second direction D2 by the second transport belt 15B, as shown in
As a result, in the region of the first transport belt 15A where the need for skew correction is high, the effect of skew correction is higher than that in the region of the second transport belt 15B, and skew correction can be performed appropriately. In the region of the second transport belt 15B where the medium is to be reliably delivered to the discharge roller pair 26, the medium is transported at an angle closer to the transport direction than in the region of the first transport belt 15A, and the medium can be appropriately delivered to the discharge roller pair 26.
In a case where the first direction D1 and the second direction D2 are different, it is desirable to adjust the circulation speed of the first transport belt 15A and the circulation speed of the second transport belt 15B such that the transport speed in the +Y direction by the first transport belt 15A and the transport speed in the +Y direction by the second transport belt 15B are the same.
In the configuration in which the transport roller pair 25 for transporting the medium to the first transport belt 15A is provided upstream of the first transport belt 15A in the transport direction as in the present embodiment, the angle formed by the transport direction and the first direction D1 may be smaller than the angle formed by the transport direction and the second direction D2 as shown in
As described above, in a case where the transport roller pair 25 is provided upstream of the first transport belt 15A in the transport direction, it is difficult for the medium to rotate while the medium is nipped by the transport roller pair 25, and there is a concern that damage such as wrinkling will occur in the medium due to the restraining action of the transport roller pair 25 and the rotating action of the first transport belt 15A being simultaneously applied to the medium.
However, as shown in
In such a configuration, the angle between the transport direction and the first direction D1 and the angle between the transport direction and the second direction D2 may be adjusted in accordance with the lengths of the medium in the transport direction. For example, the longer the medium is in the transport direction, the longer the time during which the restraining action of the transport roller pair 25 and the rotating action of the first transport belt 15A will be simultaneously applied, and the higher the risk of damage, so the smaller the angle may be set between the transport direction and the first direction D1, with increase in length of the medium in the transport direction.
In a case where the first direction D1 and the second direction D2 are different, it is desirable to adjust the circulation speed of the first transport belt 15A and the circulation speed of the second transport belt 15B such that the transport speed in the +Y direction by the first transport belt 15A and the transport speed in the +Y direction by the second transport belt 15B are the same.
As shown in
In this case, as shown in
As shown in
In such a configuration, the second restriction section 32 may be constituted by the plurality of restriction sections along the transport direction as shown in
In addition to the inclination of the transport belt with respect to the transport direction, as shown in
Since the medium is moved to the first restriction section 31 as indicated by reference symbol Pj-1 by the paddles 43, it is possible to appropriately correct the skew of the medium.
The paddles 43 shown in
In addition, in a case where the side end portion including the first edge Ps1 is easily deformed or curled upward as indicated by reference symbol Pj-3 by the action of the paddles 43 when the first edge Ps1 of the medium comes into contact with the first restriction surface 31a of the first restriction section 31, it is also desirable to use the upper restriction section 38 described with reference to
The present disclosure is not limited to the embodiments described above, and various modifications can be made within the scope of the disclosure described in the claims, and it is needless to say that these are also included in the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2022-131751 | Aug 2022 | JP | national |
| 2022-131764 | Aug 2022 | JP | national |
| 2022-174535 | Oct 2022 | JP | national |
| 2022-174569 | Oct 2022 | JP | national |
