Field of the Invention
The present invention relates to an image forming system.
Description of the Related Art
In the prior art, an image forming apparatus adopting an electro-photographic system is applied widely as a copier, a printer, a plotter, a facsimile machine, or a multifunction printer having such multiple functions. An operation unit is provided for the image forming apparatus through which a user can switch operations and enter detailed settings of the respective operations. Such operation unit is often disposed in a fixed manner on an upper surface of an apparatus body, but recently, large-sized liquid crystal panels are starting to be adopted, so that if the operation unit is arranged in a fixed manner on the upper surface of the apparatus body, there is a limit to the size of the operation unit capable of being installed to the apparatus body.
Therefore, for example, Japanese Patent Application Laid-Open Publication No. 2006-347091 discloses an image forming apparatus where an operation unit is disposed as a separate body from the apparatus body, and supported movably by an arm, according to which a large-sized liquid crystal panel can be disposed, regardless of the area or the shape of the upper surface of the apparatus body. In such image forming apparatus, the operation unit can be switched between a state where it is positioned frontward at a right side of the apparatus body and a state where it is positioned at an upper center portion of a front portion of the apparatus body, wherein the operation unit can be used in both states.
However, in the above-described image forming apparatus, the operation unit can only be moved between the front right side area and the center front side area of the apparatus body, so that it has the following drawbacks.
When failure occurs to the image forming apparatus, for example in order to specify the cause of failure, a service person must use the operation unit to confirm various data displayed on the operation unit and enter special operation settings, while checking the actual action of the image forming apparatus. Therefore, if the operation unit is positioned remote from the failure location, the service person must move back and forth for confirmation operation, so that excessive time is required for movement, and speedy recovery is thereby hindered.
For example, in an example where the image forming apparatus is used alone in a normal office or the like, the distance back-and-forth movement required during the confirmation operation is not so long, so that it will not become a problem. On the other hand, for example, in an image forming system capable of performing on-demand printing using a sheet feeding apparatus, a finisher and the like in addition to the image forming apparatus, the distance of back-and-forth movement becomes longer compared to the case where the image forming apparatus is used alone. Especially when the maintenance operation is performed at the rear side of the image forming apparatus, the service person must move back and forth to the front and rear sides of the image forming apparatus, and the work time and work labor will be further increased in the image forming system since the service person must take a detour around other devices.
In the above-described image forming apparatus, the operation unit can only move between the front right side and the front center area of the apparatus body, so that it has a drawback that when the apparatus is applied to a large-scale image forming system as described, the distance of back-and-forth movement of the service person during failure becomes excessive. Moreover, it may also be possible to extend the length of the arm movably supporting the operation unit on the above-described image forming apparatus, with the aim to enhance the degree of freedom of movement of the operation unit. However, for example, if an arm long enough to allow the operation unit to reach the sheet feeding apparatus or the finisher of the above-mentioned image forming system is to be provided, an extremely long arm becomes necessary, so that not only the cost is increased, but the long arm itself may disturb the maintenance operation.
According to one aspect of the invention, an image forming system comprising: an apparatus body having an image forming portion capable of forming an image based on an image information; an operation unit provided separately and movably with the apparatus body so as to be placed on the apparatus body and configured to operate the apparatus body; and a cable positioned and configured to electrically connect the apparatus body and the operation unit such that the operation unit does not reach an installation surface on which the apparatus body is supported.
Further, according to one aspect of the invention, an image forming system comprising: an apparatus body having an image forming portion capable of forming an image based on an image information; an operation unit provided separately and movably with the apparatus body so as to be placed on the apparatus body and configured to operate the apparatus body; a cable positioned and configured to electrically connect the apparatus body and the operation unit; and an adjustment portion positioned and configured to adjust a length of the cable by suspending the cable.
Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.
Now, the preferred embodiments of the present invention will be described in detail with reference to
As shown in
The present embodiment illustrates a tandem-type full color printer as an example of the image forming apparatus 2. However, the present invention is not restricted to tandem-type image forming apparatuses 2, and the invention can be applied to other types of image forming apparatuses, or even to monochrome or single-color apparatuses instead of full color apparatuses.
As shown in
The sheet feeding portion 30 is arranged on a lower area of the apparatus body 10, equipped with a sheet cassette 31 loading and storing sheets S and a feeding roller 32, and feeds sheets S to the image forming portion 40.
The image forming portion 40 is equipped with an image forming unit 41, toner bottles 42, an exposure unit 43, an intermediate transfer unit 44, a secondary transfer portion 45 and a fixing unit 46, and forms images.
The image forming unit 41 is equipped with four image forming units 41y, 41m, 41c and 41k, for forming toner images of four colors, which are yellow (y), magenta (m), cyan (c) and black (k). Each image forming unit can be attached to or removed from the apparatus body 10 by a user. For example, the image forming unit 41y is equipped with a photosensitive drum 47y for forming a toner image, a charging roller 48y, a developing sleeve 49y, a drum cleaning blade (not shown), and a toner and the like. Toner is supplied from the toner bottle 42y filled with toner to the image forming unit 41y. The other image forming units 41m, 41c and 41k have similar structures as the image forming unit 41y except for the difference in toner color, so that detailed descriptions thereof are omitted.
The exposure unit 43y exposes the surface of the photosensitive drum 47y, and forms an electrostatic latent image on the surface of the photosensitive drum 47y.
The intermediate transfer unit 44 is arranged at the lower direction D of the image forming unit 41. The intermediate transfer unit 44 is equipped with a plurality of rollers, such as a drive roller 44a and primary transfer rollers 44y, 44m, 44c and 44k, and an intermediate transfer belt 44b wound around the rollers. The primary transfer rollers 44y, 44m, 44c and 44k are arranged to face the photosensitive drums 47y, 47m, 47c and 47k, respectively, and are in contact with the intermediate transfer belt 44b. By applying a transfer bias of positive polarity to the intermediate transfer belt 44b from the primary transfer rollers 44y, 44m, 44c and 44k, toner images having negative polarity formed on the photosensitive drums 47y, 47m, 47c and 47k are respectively sequentially transferred to the intermediate transfer belt 44b in multiple layers. Thereby, a full-color image is formed on the intermediate transfer belt 44b.
The secondary transfer portion 45 is equipped with a secondary transfer inner roller 45a and a secondary transfer outer roller 45b. A full-color image formed on the intermediate transfer belt 44b is transferred to the sheet S by applying a secondary transfer bias having positive polarity on the secondary transfer outer roller 45b. The secondary transfer inner roller 45a stretches the intermediate transfer belt 44b in an inner side of the intermediate transfer belt 44b, and the secondary transfer outer roller 45b is arranged at a position facing the secondary transfer inner roller 45a with the intermediate transfer belt 44b interposed therebetween.
The fixing unit 46 is equipped with a fixing roller 46a and a pressure roller 46b. A sheet S is nipped between and transferred by the fixing roller 46a and the pressure roller 46b, and the toner image transferred onto the sheet S is heated, pressed, and fixed on the sheet S.
The sheet conveying portion 50 is equipped with a pre-secondary-transfer conveying path 51, a pre-fixing conveying path 52, a discharge path 53 and a re-conveying path 54, for conveying the sheet S fed from the sheet feeding portion 30 via the image forming portion 40 to the sheet discharge portion 60.
The sheet discharge portion 60 is equipped with a discharge roller pair 61 arranged on a downstream side of the discharge path 53, and a discharge port 62 arranged on a side area of the left direction L-side of the apparatus body 10. The discharge roller pair 61 feeds the sheet S conveyed from the discharge path 53 via the nip portion, and discharges the sheet from the discharge port 62. The discharge port 62 is capable of feeding the sheet S to the optional discharge device 3 arranged on the left direction L-side of the apparatus body 10. It is noted that the optional discharge device 3 is providing a given processing to a sheet S after image forming.
As shown in
As shown in
The CPU 73 is a microprocessor in charge of controlling the whole image forming apparatus 2, and it is the main body of a system controller. The CPU 73 is connected via the input/output circuit 76 to the sheet feeding portion 30, the image forming portion 40, the sheet conveying portion 50, the sheet discharge portion 60, the HDD 72, and the operation unit 80, communicating signals with the respective portions and controlling the operations thereof. The user can execute operations and enter settings of the image controller 71 by entering commands from a computer (not shown) connected to the apparatus body 10, or manipulating the operation unit 80.
The operation unit 80 is formed as a separate body from the apparatus body 10 and capable of being placed movably on the apparatus body 10, for operating the respective sections of the apparatus body 10. The operation unit 80 is equipped with a driver board 81 and a liquid crystal touch panel 82. The liquid crystal touch panel 82 displays necessary information for enabling the user to operate the image forming apparatus 2, such as remaining amounts of sheets S and toner supplied to the apparatus body 10, a warning message when consumable supplies such as sheets or toner run out, and procedures for supplying the consumable supplies. Further, the liquid crystal touch panel 82 accepts input operations from the user related to the size or paper weight of the sheets S, density control of the images, setting of number of output sheets, and so on.
The operation unit 80 is connected to the electrical unit 70 of the apparatus body 10 via a cable 90, through which power can be conducted. The cable 90 is a bundled wire in which a signal line 90a and a power line 90b are bundled. The signal line 90a connects the input/output circuit 76 of the image controller 71 and the driver board 81, and the power line 90b connects a power supply 12 of the apparatus body 10 and the driver board 81. The configuration of the connecting section of the operation unit 80 and the electrical unit 70 via the cable 90 will be described later.
Next, we will describe an image forming action according to the image forming apparatus 2 having the above-described configuration.
When the image forming operation is started, at first, photosensitive drums 47y, 47m, 47c and 47k are rotated and the surfaces of the drums are respectively charged by charging rollers 48y, 48m, 48c and 48k. Thereafter, laser beams are irradiated respectively from exposure units 43y, 43m, 43c and 43k to the photosensitive drums 47y, 47m, 47c and 47k based on the image information, and electrostatic latent images are formed on the surfaces of the photosensitive drums 47y, 47m, 47c and 47k. By having toner adhered to the electrostatic latent images, the electrostatic latent images are developed and visualized as toner images, and the toner images are transferred to the intermediate transfer belt 44b.
On the other hand, in parallel with such operation for forming toner images, the feeding roller 32 rotates, separating the uppermost sheet S in the sheet cassette 31 from the pile of sheets S and feeding the sheet. Then, at a matched timing with the toner image on the intermediate transfer belt 44b, the sheet S is conveyed via the pre-secondary-transfer conveying path 51 to the secondary transfer portion 45. Further, the image is transferred from the intermediate transfer belt 44b to the sheet S, and then the sheet S is conveyed to the fixing unit 46, where the unfixed toner image is heated, pressed and fixed onto the surface of the sheet S, and the sheet S on which the image has been fixed is discharged through the discharge port 62 via the discharge roller pair 61 and supplied to the optional discharge device 3.
Next, the details of the electrical unit 70 and the operation unit 80, specifically the configuration of the connecting section with the cable 90, will be described in detail with respect to
As shown in
The electrical unit 70 is equipped with an opening (apparatus body-side retaining portion, boundary portion) 77a formed at a lower portion of a rear surface of an outer cover 77, and a clamp 79 provided on a board cover 78 fixed to a frame (not shown). A diameter of the opening 77a is equivalent to an outer diameter of the cable 90. The opening 77a holds the cable 90 via the electrical unit 70 with respect to the apparatus body 10, and the cable 90 moves with respect to the opening 77a when an external tensile force of a given level or greater is applied to the cable 90. In other words, the cable 90 is held by a portion of the electrical unit 70.
The cable 90 is introduced to the interior of the electrical unit 70 from the outer side of the electrical unit 70 through the opening 77a, retained by the respective clamps 79 and connected via a connector (apparatus body-side connector) 71a to the image controller 71. The cable 90 is laid in the inner side of the electrical unit 70 from the opening 77a side along a bottom surface toward the front direction F, bent along the inner surface of the outer cover 77 toward the upper direction U and retained in that manner by the clamps 79. In other words, the cable 90 is not arranged linearly between the connector 71a connected to the apparatus body 10 and the opening 77a retained movably with respect to the apparatus body 10, but arranged so that one area is bent. The bent arrangement of the cable 90 is maintained by the retention of the clamps 79.
Now, when the operation unit 80 falls down from the plane surface 1b, the cable 90 will support the weight of the operation unit 80. For example, if the tensile strength of the cable 90 is 200 N and the weight of the operation unit 80 is approximately 2 kg, the cable is capable of supporting the weight of the operation unit 80 including the shock applied during the fall.
For example, when the operation unit 80 falls down from the plane surface 1b, the cable 90 receives external force in a direction being pulled out from the opening 77a. In general, the strength of the connector is weaker than the bundled wire, so that there is fear that if the external force acts directly on the connector 71a, the connector 71a may be pulled out, or the connector 71a may even be damaged. On the other hand, according to the present embodiment, the cable 90 is arranged in a bent manner, allowing the external force to be absorbed by having the bent portion of the cable 90 extended until it is arranged linearly between the connector 71a and the opening 77a, so that it becomes possible to suppress external force from being applied directly on the connector 71a. Moreover, even if external force having a strength or tensile length that exceeds the upper limit value is applied, the connector 71a or the cable 90 may be damaged by the force, but the expensive image controller 71 can be prevented from being damaged.
As shown in
The operation unit 80 is equipped with an opening (operation unit-side retaining portion, boundary portion) 84b formed at a lower portion on the rear surface of the support column 84, and a clamp 86 fixed to an inner surface of the support column 84 and an inner side of the main body portion 83. The diameter of the opening 84b is equivalent to an outer diameter of the cable 90. The opening 84b retains the cable 90 with respect to the operation unit 80, and the cable 90 moves with respect to the opening 84b when an external tensile force of a given level or greater is applied thereto.
The cable 90 is passed through the opening 84b from the exterior of the support column 84 to the inner side of the support column 84, retained by the respective clamps 86, and connected to the driver board 81 via connectors (operating portion-side connectors) 81a and 81b. The signal line 90a is connected to the connector 81a, through which control signals of the liquid crystal touch panel 82 are communicated, and the power line 90b is connected to the connector 81b, through which power is supplied from the power supply 12 to the liquid crystal touch panel 82.
The cable 90 is pulled into the main body portion 83 from the uppermost area of the support column 84, arranged along the rear surface of the liquid crystal touch panel 82 toward the upper direction U, and then bent toward the driver board 81 and retained by the clamps 86. That is, the cable 90 is not arranged linearly between the connectors 81a and 81b connected to the operation unit 80 and the opening 84b retained in a movable manner with respect to the operation unit 80, but arranged so that one area thereof is bent. The bent arrangement of the cable 90 is maintained by the retention via the clamps 86.
At this time, for example, if the operation unit 80 falls off from the plane surface 1b, external force is applied to the cable in the direction being pulled out from the opening 84b. As described, since the cable 90 is arranged in a bent manner according to the present embodiment, the external force can be absorbed until the bent section of the cable 90 is extended linearly between the connectors 81a and 81b and the opening 84b. According to this arrangement, it becomes possible to suppress external force from being applied directly to the connectors 81a and 81b. Moreover, even if external force having a strength or tensile length that exceeds the upper limit is applied, the connectors 81a and 81b or the cable 90 may be damaged by the force, but the expensive driver board 81 can be prevented from being damaged.
Next, the length of the cable 90 will be described in detail with reference to
The length of the cable 90 can be determined by the following method, for example. As shown in
In this state, it is assumed that the operation unit 80 falls from the lowest plane surface 1c of the upper surface 10a of the apparatus body 10 to the rear direction B. In that case, the length of the cable 90 from the opening 77a to the opening 84b with the operation unit 80 not being in contact with the installation surface 4, that is, the length of the cable 90 exposed to the exterior of the device, can be calculated as h1−h2. Since the apparatus body 10 is sufficiently long in the side direction, it is assumed that the operation unit 80 will not fall from the left and right sides. However, if the side length of the apparatus body 10 is not sufficiently long and there is fear that the operation unit 80 may fall from the sides of the apparatus body 10, the length of such case should also be considered.
In other words, according to the present embodiment, the whole length of the cable 90 between the electrical unit 70 and the operation unit 80 determined so that the operation unit 80 will not contact the installation surface 4 is set shorter than the difference between a minimum distance h1 from the opening 77a to the installation surface 4 along the apparatus body 10 and a height h2 of the operation unit 80.
Accordingly, in the present embodiment, the length of the cable 90 is set shorter than (h1−h2), so that the operation unit 80 can be prevented from being in contact with the installation surface 4 even if the operation unit 80 falls from the plane surface 1c in either the front direction F or the rear direction B (or in the left or right side direction). In the present embodiment, the electrical unit 70 is provided behind the plane surface 1b, so that the operation unit 80 mounted on the plane surface 1b will not fall easily even when pushed toward the rear direction B.
The method for setting the length of the cable 90 is not restricted to the aforementioned calculation method using the dimension of the apparatus body 10, and for example, the length can be set by actually using the cable 90 to suspend the operation unit 80 to adjust the length of the cable so that the operation unit 80 will not contact the installation surface 4.
Now, as shown in
We will describe the state of use of the above-described operation unit 80 in detail. As shown in
Since the cable 90 has flexibility, the user can place the operation unit 80 at any arbitrary position on the plane surface 1b according to preference, or at any arbitrary position on other plane surfaces 1a and 1c, in the reachable range of the cable 90, or even on the top surface of the optional discharge device 3. Thus, the user can set the position of the operation unit 80 according to workflow, and the efficiency of the workflow can be improved.
For example, it is possible to place the output sheet S on the widest plane surface 1c for image confirmation, and place the operation unit 80 on the plane surface 1c adjacent to the sheet S to adjust the image formation while looking at the sheet S. In that case, the user can perform a continuous operation of placing the sheet S discharged from the optional discharge device 3 on the plane surface 1c, confirming the image, and entering adjustment values in the operation unit 80, so that the efficiency of workflow can be improved.
Further, as shown in
Since the operation unit 80 can be placed anywhere, some users may place the operation unit 80 on the front side of the plane surface 1b. In that case, the operation unit 80 may fall off the plane surface 1b due to erroneous placement by the user, unexpected contact with the operation unit 80, earthquakes, and so on. If the operation unit 80 comes in strong contact with the installation surface 4, there is fear that the operation unit may be damaged or broken, but according to the image forming apparatus 2 of the present embodiment, the operation unit 80 that has fallen from the plane surface is suspended and held by the cable 90, and is prevented from being in contact with the installation surface 4.
As described, according to the image forming apparatus 2 of the present embodiment, the apparatus body 10 and the operation unit 80 are connected via the cable 90, so that the freedom of placement of the operation unit 80 can be increased compared to the case where the two members are connected via an arm. Thereby, the movable range of the operation unit 80 can be expanded, allowing the user to set the position of the operation unit 80 according to workflow, and the workflow efficiency can be improved. Further, during maintenance operation, such as during failure, the operator can use the operation unit 80 to realize improved workability and enhanced processing speed.
Further according to the image forming apparatus 2 of the present embodiment, the length of the cable 90 is set to such a length that the operation unit 80 will not contact the installation surface 4 on which the apparatus body 10 is supported. Therefore, even if the operation unit 80 falls from the apparatus body 10 by an earthquake or the like, the operation unit 80 can be prevented from being in contact with the installation surface 4 and breaking.
According further to the image forming apparatus 2 of the present embodiment, since the image controller 71 is built in the electrical unit 70, the length of the cable 90 to the operation unit can be minimized, and the occurrence of communication troubles caused by noise and the like can be suppressed.
According even further to the image forming apparatus 2 of the present embodiment, the cable 90 is arranged in a bent manner within the electrical unit 70. Therefore, the external force can be absorbed by having the bent area of the cable 90 extended linearly between the connector 71a and the opening 77a, so that it becomes possible to suppress external force from being applied directly to the connector 71a. Similarly, the cable 90 is arranged in a bent manner within the operation unit 80. Therefore, the external force can be absorbed by having the bent area of the cable 90 extended linearly between the connectors 81a, 81b and the opening 84b, so that it becomes possible to suppress external force from being applied directly to the connectors 81a and 81b.
The preferred embodiment described above illustrates an example where the whole area from the opening 77a to the opening 84b is set as the free area of the cable 90 in which the cable 90 can move along with the movement of the operation unit 80, but the present invention is not restricted to such example. For example, as shown in
The present embodiment has illustrated an example where the cable 90 has a length determined so that when the operation unit 80 falls from the plane surface 1b, the unit 80 reaches a height close to the installation surface 4, but the present invention is not restricted to such example. For example, it is possible to set the length of the cable 90 shorter so that the operation unit 80 will not fall from the plane surface 1b (refer to
According even further to the present embodiment, an example has been illustrated of a case where the whole area between the electrical unit 70 and the operation unit 80 is set as the free area of the cable 90 in which the cable can move along with the movement of the operation unit 80, but the present invention is not restricted to such example. For example, an adjustment portion capable of adjusting the length of the free area of the cable 90 can be provided. In that case, even if the cable 90 has a length so long that the operation unit 80 will contact the installation surface 4 if the whole area between the electrical unit 70 and the operation unit 80 is set as the free area, the adjustment portion can be used to limit the length of the free area of the cable 90 so that the operation unit 80 will not contact the installation surface 4.
In other words, the length of the free area of the cable 90 between the apparatus body 10 and the operation unit 80 when the operation unit 80 does not contact the installation surface 4 is set smaller than the difference between the height of the operation unit 80 and the minimum distance from a final retaining position of the cable 90 on the side of the apparatus body 10 to the installation surface 4 along the apparatus body 10.
The adjustment portion of this arrangement can be set as a supporting portion supporting at least a portion of the cable 90 in the bent state. In that case, the supporting portion can be, for example, a hook, a pinching member or a winding member and the like disposed at least on either the apparatus body 10 or the operation unit 80 (refer to winding member 5 of
The arrangement of the adjustment portion is not restricted to the arrangement for retaining at least a portion of the cable 90 in a bent state, and it is also possible to arrange the cable 90 in the linear state but with only area of the cable 90 being fixed to at least either the apparatus body 10 or the operation unit 80. In that case, since the length of the cable 90 beyond the area fixed by the adjustment portion becomes the free area, it is possible to shorten the length of the free area by setting the length so that the operation unit 80 will not contact the installation surface 4.
In the present embodiment, a case has been illustrated where the electrical unit 70 is applied as the partition unit, but the present invention is not restricted thereto. For example, a simple partition unit that does not store any electrical component can be provided instead of the electrical unit 70.
Further according to the present embodiment, the image forming apparatus 2 of the image forming system 1 equipped with the optional discharge device 3 has been described, but the present invention is not restricted thereto. For example, the present invention can be applied to an independent image forming apparatus having an image reading portion and a discharge tray.
While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Number | Date | Country | Kind |
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2014-191047 | Sep 2014 | JP | national |
This application is a continuation of U.S. patent application Ser. No. 14/855,681, filed Sep. 16, 2015, and which claims the benefit of Japanese Patent Application No. 2014-191047, filed Sep. 19, 2014 which are hereby incorporated by reference herein in their entireties.
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Machine translation of Jun. 5, 2018 Japanese Office Action. |
Office Action dated Jun. 5, 2018, in Japanese Patent Application No. 2014-191047. |
Number | Date | Country | |
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20170115621 A1 | Apr 2017 | US |
Number | Date | Country | |
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Parent | 14855681 | Sep 2015 | US |
Child | 15398345 | US |