Patent Application
20110115866
1. Field of the Invention
The present invention relates to an image forming apparatus, and more particularly, to a structure configured to contain sheets.
2. Description of the Related Art
For a conventional image forming apparatus, there is a technology for supplying a recording medium such as a fan-fold paper. According to the technology, the fan-fold paper is contained in a fan-fold paper storage box placed on a placement part arranged on the rear side of a printer on a plane where the printer is placed (see Japanese Patent Application Laid-Open No. 2005-179042).
In the conventional image forming apparatus, such as an ink jet recording apparatus, in the case where a sheet feeding portion such as a recording medium feeding portion is arranged on the rear side of the apparatus main body provided with the sheet feeding portion and a delivery portion, the recording medium needs to be carried all the way across the apparatus main body to be contained in the sheet feeding portion, and hence the storage portion of the recording medium is difficult to see. Further, in the conventional image forming apparatus, the recording medium is supplied on the rear side with respect to the front side of the apparatus main body, and hence a space needs to be provided on the rear side of the apparatus main body, which requires a larger installation space for the apparatus main body.
The present invention has been made in view of the above-mentioned circumstances, and therefore, it is an object of the present invention to provide an image forming apparatus which offers excellent visibility and is capable of saving space.
According to the present invention, an image forming apparatus includes: a recording unit configured to form an image on a recording medium conveyed in a predetermined conveying direction; a main body portion configured to support the recording unit in an openable and closable manner; a conveying unit configured to convey, in the predetermined conveying direction, the recording medium on which an image is to be formed by the recording unit, the conveying unit being disposed below the recording unit; a holder configured to contain the recording medium on which an image is to be formed by the recording unit, the holder being disposed upstream of the conveying unit in the predetermined conveying direction; and a raising and lowering mechanism configured to raise and lower the holder between a first position for feeding the recording medium to the recording unit and a second position placed above the first position.
According to the present invention, there may be provided an image forming apparatus which offers excellent visibility and is capable of saving space.
Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.
In the following, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The ink jet recording apparatus 101 is connected to a host personal computer (PC) 102 for transmitting image information to the ink jet recording apparatus 101. The ink jet recording apparatus 101 includes a recording unit 107. The recording unit 107 includes a recording engine 105 serving as an image forming portion and an operation panel 106 including a display panel and a button. The recording engine 105 includes a recording head 103 of
The ink jet recording apparatus 101 further includes a base unit 113 serving as a main body portion. The base unit 113 includes a recording medium conveying unit 108 configured to convey the recording medium, an ink supply unit configured to supply ink to the recording head 103, a recording medium feeding unit 110 (shown in
The recording engine 105 and a pinch roller 124 configured to convey the recording medium are provided inside the recording unit 107. Further, the base unit 113 includes the ink supply unit 109, the waste liquid unit 112, the stacker 111, the recording medium feeding unit 110, and the raising and lowering mechanism 116, and further includes the recording medium conveying unit 108 configured to convey the recording medium. The recording engine 105 is disposed above the recording medium conveying unit 108 when the recording unit 107 is closed, and performs printing on the recording medium conveyed by the recording medium conveying unit 108. Further, the recording medium feeding unit 110 is disposed upstream of the recording medium conveying unit 108 in a direction in which the recording medium is conveyed by the recording medium conveying unit 108. Still further, the stacker 111 disposed in front of the ink jet recording apparatus 101 is disposed downstream of the recording medium conveying unit 108 in the direction in which the recording medium is conveyed by the recording medium conveying unit 108, so as to stack the recording medium delivered to the front.
Here, the recording medium contained in the recording medium tray 114 is conveyed under the recording head 103 by the recording medium conveying unit 108. The recording medium conveying unit 108 includes one or more conveyor belts 108a, and the recording medium is conveyed along with the rotation of the conveyor belt 108a. Further, the conveyor belt 108a is configured to be rotated through the rotation of a conveyor motor 201. The recording head 103 detects a position of the recording medium thus conveyed, and ejects ink based on recording data (image information) transmitted from the host PC (personal computer) 102, to thereby form an image on the recording medium. The recording medium on which the image has been formed is conveyed outside the ink jet recording apparatus 101, and stacked on the stacker 111. With this configuration, the recording medium contained in the recording medium tray 114 is contained inside the ink jet recording apparatus 101, and more specifically, contained in a position closer to the recording engine 105. Accordingly, even in a case where the ink jet recording apparatus 101 is not used for a long period of time, the recording medium contained in the recording medium tray 114 is hardly exposed to outside air, and hence unsusceptible to change in humidity and temperature. Further, the recording medium contained in the recording medium tray 114 is contained in a position closer to the recording engine 105, and hence the recording medium positioned between the recording medium containing position and the recording engine 105 is also less likely to be exposed to outside air.
Next, how to contain the recording medium in the ink jet recording apparatus 101 will be described below. Note that, in the following, a case of using a fan-fold paper as the recording medium will be described.
The recording medium tray 114 is in a box-like shape, and holds recording media P (
The recording medium tray 114 is provided with rollers 119a, 119b, and 119c. Further, rails 120a, 120b, and a side regulating member 128 are provided in the ink jet recording apparatus 101. The roller 119a rolls on along the rail 120a while the roller 119b rolls on along the rail 120b, to thereby move the recording medium tray 114. The roller 119c provided on the guide portion 127 rolls inside the side regulating member 128. With this configuration, the recording medium tray 114 moves upstream and downstream in the conveying direction.
Inside the ink jet recording apparatus 101, the recording medium holder 115 is provided. Hooks 129a and 129b are disposed to be turnable with respect to a frame of the recording medium holder 115. The recording medium holder 115 is provided with the hooks 129a and 129b, which are biased by springs 130a and 130b so that the tip end portions of the hooks 129a and 129b are turned downward. The recording medium tray 114 has support plates provided on both sides in a width direction perpendicular to the conveying direction. On the support plates, shafts 132a and 132b are formed so as to protrude in a direction opposite to a direction toward the recording media placed on the recording medium tray 114. The shaft 132b (not shown) is formed on the support plate opposing to the support plate on which the shaft 132a is formed, so as to protrude in a direction opposite to the protruding direction of the shaft 132a. When the operator moves the recording medium tray 114 toward the rear (upstream in the conveying direction) of the ink jet recording apparatus 101, the shafts 132a and 132b move the tip end portions of the hooks 129a and 129b upward, respectively. After that, the tip end portions of the hooks 129a and 129b move down so as to engage with the shafts 132a and 132b, respectively. The recording medium tray 114 is held by the hooks 129a and 129b as being pressed against multiple abutting members 131a, 131b, 131c, 131d, 131e, and 131f. The recording medium holder 115 includes a tray switch 202. The tray switch 202 is turned on when the recording medium tray 114 is set in the recording medium holder 115. The tray switch 202 is turned off when the recording medium tray 114 is not set in the recording medium holder 115.
Further, the recording medium holder 115 and the recording medium tray 114 are provided with a recording medium tray anti-drop mechanism (not shown), which prevents the recording medium tray 114 from dropping out of the recording medium holder 115 in the movement of the recording medium holder 115. At this time, the operator can see the recording medium tray 114 through the opening M (
Note that, in the first embodiment, the recording medium tray 114 is pulled out manually. However, the recording medium tray 114 may be pulled out, rather than through such a manual mechanism, but through a moving mechanism (not shown) which may be driven by an operation made through an operation panel 106. Alternatively, there may be conceivable another configuration, in which the recording medium tray 114 may be mechanically pulled out in association with the movement of the recording unit 107.
When the recording unit 107 is opened, the open and close sensor 125 protrudes upward. When the recording unit 107 is closed, the open and close sensor 125 is pushed down by the recording unit 107. The change in state of the open and close sensor 125 allows a control portion (not shown) to detect that the recording unit 107 is closed.
Here, the control portion performs control so that the recording medium P may be conveyed by the recording medium conveying unit 108 and printing may be performed by the recording engine 105 only when the recording medium sensor 123 has detected that the recording medium P is contained in the recording medium tray 114 and when the open and close sensor 125 has detected that the recording unit 107 is closed. When the recording unit 107 is opened, it is displayed on the operation panel 106 that the recording unit 107 is opened. Furthermore, when no recording medium is left in the recording medium feeding unit 110 after being successively used, the conveyance and the printing of the recording medium are stopped. Then, it is displayed on the operation panel 106 that no recording medium is left. Note that, according to the description of the first embodiment, the presence or absence of the recording medium P and the opening and closing of the recording unit 107 are displayed on the operation panel 106. However, the present invention is not limited thereto, and such information may be provided by using a light emitting device (LED), a warning tone, a warning unit, or the like.
When the recording unit 107 is closed after the recording media P are contained, the recording media P thus contained are pressed down against the recording medium conveying unit 108 by the pinch rollers 124 included in the recording unit 107. Here, the recording medium conveying unit 108 includes one or more conveyor belts 108a, and the recording medium P is conveyed along with the rotation of the conveyor belt 108a. As described above, the pinch rollers 124 press down the upper surface of the recording medium P while the conveyor belt 108a holds the lower surface of the recording medium P, and the pinch roller 124 and the conveyor belt 108a both rotate while sandwiching the recording medium P therebetween, to thereby convey the recording medium P. Alternatively, a sucking portion may be provided underneath the conveyor belt 108a so that the recording medium P may be conveyed while being suctioned to the conveyor belt 108a. In this case, the pinch rollers 124 are unnecessary.
Here, in the case where the recording unit 107 is opened (NO in S705), a recording unit open warning is given (S706). In, the case where the recording unit is closed (YES in S705), the conveyance of the recording medium is started (S707). Then, the recording head 103 ejects ink based on data transmitted from the PC, to thereby form an image on the recording medium (S708). When the image formation based on the transmitted data is completed, printing is stopped (S709). Further, the conveyance of the recording medium is stopped each time (S710), and the recording head 103 is recovered (S711). Further, the power source is turned off (S712).
As described above, in the first embodiment, the recording unit 107 is left open, which allows the recording media to be set in the recording medium tray 114 by the operation performed through the opening M. Further, the recording medium P is delivered in front of the ink jet recording apparatus main body after printing, and hence operations of confirming the results of the printing and taking out the recording medium may be performed in front of the apparatus main body. This configuration attains easy-to-use front sheet feeding and front sheet delivery, a reduction in installation space of the apparatus in the sheet delivery direction, ease of confirming the results of printing, and an improvement in workability when taking out the printed recording medium.
Note that, in the first embodiment, the recording medium holder 115 is adjustable in height according to the type, the condition, and the stacked amount of the recording media P, through a height adjustment mechanism (not shown) controlled by the control portion.
According to the first embodiment, the image forming apparatus includes, in the apparatus main body, the holder configured to support the recording medium and the raising and lowering mechanism configured to raise and lower the holder, so as to open the recording unit of the apparatus main body, to thereby allow the recording media to be set in the holder by operation performed through the opening. Accordingly, the workability is improved when the recording medium is contained and taken out.
Next, the second embodiment of the present invention will be described.
In the configuration as described above, when containing the recording medium, the recording unit 107 is first opened upward with respect to the recording medium conveying unit 108, to thereby form the opening M in the form of an alligator's mouth. After that, the raising and lowering mechanism 116 raises the recording medium holder 115 to the upper position above the recording medium feedable position. Then, the operator reaches by the hand into the ink jet recording apparatus 101 from the front thereof, that is, through the opening M formed by the recording unit 107, and pulls out the recording medium holder 115 in the front direction, that is, the direction indicated by the arrow A, to thereby place the recording medium holder 115 to the recording medium loading position.
Note that, the raising and lowering mechanism 116 is provided with a rail 120, and the recording medium holder 115 is pulled out by the operator in the front direction along the rail 120. Further, a roller 119 is provided to the bottom surface of the recording medium holder 115, and the roller 119 allows the recording medium holder 115 to move smoothly on the recording medium conveying unit 108. Further, the recording medium holder 115 and the raising and lowering mechanism 116 are provided with a recording medium holder anti-drop mechanism (not shown), which prevents the recording medium holder 115 from falling off from the raising and lowering mechanism 116 while the raising and lowering mechanism 116 is moved.
When containing a fan-fold paper as the recording medium P, the recording medium P is inserted from the opening M in front of the ink jet recording apparatus, and contained on the recording medium holder 115. After the recording medium P is contained, as illustrated in
As described above, in the second embodiment, the recording medium tray 114 is not provided, and the recording medium is directly contained in the recording medium holder 115. With this configuration, the number of components may be reduced, which leads to cost reduction.
Next, the third embodiment of the present invention will be described.
In
Next, the fourth embodiment of the present invention will be described. Reference symbols described in the above-mentioned embodiments denote the same portions in the fourth embodiment, and the description thereof is omitted.
The fourth embodiment illustrates an example of the raising and lowering mechanism for the recording medium holder 115.
Next, an upper limit and a lower limit of the upward and downward movement of the recording medium holder 115 will be described. The recording medium holder 115 includes a raising and lowering flag 140. In association with the upward movement of the recording medium holder 115, the raising and lowering flag 140 moves up. The main body includes an upper limit sensor 141. When the raising and lowering flag 140 reaches the upper limit sensor 141, the raising and lowering motor 135 stops rotating, and hence the recording medium holder 115 is stopped at a predetermined upper limit position. The downward movement is similarly detected by a lower limit sensor 142, and the recording medium holder 115 stops at a predetermined lower limit position.
In the case where the upper unit (recording unit 107) is opened (when the power source is turned on), or in the case where the power source is turned on (S101), the CPU 200 first checks whether or not the tray switch 202 is turned on (S102). In the case where the tray switch 202 is turned off (NO in S102), the CPU 200 puts out the LED of the raising and lowering button 134 (S103), and the processing returns to the step (S102) of checking whether or not the tray switch 202 is turned on.
In the case where the tray switch 202 is turned on (YES in S102), the CPU 200 checks whether or not the recording medium holder 115 is detected by the lower limit sensor 142 (S104). In the case where the recording medium holder 115 is not detected by the lower limit sensor 142 (NO in S104), the CPU 200 checks whether or not the recording medium holder 115 is detected by the upper limit sensor 141 (S105). In the case where the recording medium holder 115 is not detected by the upper limit sensor 141 (NO in S105), the CPU 200 puts out the LED of the raising and lowering button 134 (S106), and moves down the recording medium holder 115 to a position which allows the recording medium holder 115 to be detected by the lower limit sensor 142 (S107). Then, the CPU 200 stops moving down the recording medium holder 115 when the recording medium holder 115 is detected by the lower limit sensor 142, and lights up the LED of the raising and lowering button 134 (S108).
In the step of S105, when the recording medium holder 115 is detected by the upper limit sensor 141 (YES in S105), the CPU 200 lights up the LED of the raising and lowering button 134 (S108).
In the step of S104, the CPU 200 checks whether the recording medium holder 115 is detected by the lower limit sensor 142, and in the case where the recording medium holder 115 is detected by the lower limit sensor 142 (YES in S104), the CPU 200 lights up the LED of the raising and lowering button 134 (S108).
The CPU 200 lights up the LED of the raising and lowering button 134 in the step of S108, and then checks whether or not the raising and lowering button 134 is pushed (S109). The CPU 200 checks whether or not the recording medium holder 115 is detected by the lower limit sensor 142 (S110), and in the case where the recording medium holder 115 is detected by the lower limit sensor 142 (YES in S110), the CPU 200 raises the recording medium holder 115 until the upper limit sensor 141 detects the recording medium holder 115 (S111). Then, when the recording medium holder 115 has been detected by the upper limit sensor 141, the CPU 200 stops raising the recording medium holder 115, and the processing returns to the step of S103. At this time, the operator pulls out the recording medium tray 114 to the front side from the recording medium holder 115, so that the recording medium may be contained and taken out from the recording medium tray 114 with ease.
In the step of S110, in the case the recording medium holder 115 is not detected by the lower limit sensor 142 (NO in S110), the CPU 200 lowers the recording medium holder 115 until the lower limit sensor 142 detects the recording medium holder 115 (S112). Then, the CPU 200 stops lowering the recording medium holder 115 when the recording medium holder 115 has been detected by the lower limit sensor 142. In the case where the recording medium holder 115 is not detected by the lower limit sensor, the CPU 200 further lowers the recording medium holder 115, and the processing returns to the step of S103. At this time, the operator pushes the raising and lowering button 134 to raise the recording medium holder 115, and after that, the operator pulls out the recording medium tray 114 to the front side from the recording medium holder 115, so that the recording medium may be contained and taken out from the recording medium tray 114 with ease.
In the step of S109, in the case where the raising and lowering button 134 is not pushed (NO in S109), the CPU 200 checks whether or not the recording medium holder 115 is detected by the lower limit sensor 142 (S113). In the case where the recording medium holder 115 is not detected by the lower limit sensor 142 (NO in S113), the CPU 200 returns the processing to the step of S103.
In the step of S113, in the case where the recording medium holder 115 is detected by the lower limit sensor 142 (YES in S113), the CPU 200 checks whether or not the upper unit is opened (S114), and in the case where the upper unit is opened (YES in S114), the CPU 200 returns the processing to the step of S103.
In the step of S114, in the case where the upper unit is not opened (NO in S114), the CPU 200 puts out the LED of the raising and lowering button 134 (S115), and ends the processing (S116).
In the above, the case where the present invention is applied to a fan-fold paper is described. However, the printer according to the present invention may obviously take various forms, such as a printer employing, as a print medium, a label paper, a business card, or a card, a printer in the form of a ticket vending machine, and the like. Further, in the above, the ink jet recording apparatus is described as an example of the image forming apparatus. However, the present invention may be applied to an image forming apparatus such as a printer of an electrophotographic method.
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.
This application claims the benefit of Japanese Patent Applications No. 2009-262221, filed Nov. 17, 2009, and No. 2010-244603, filed on Oct. 29, 2010 which are hereby incorporated by reference herein in their entirety.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2009-262221 | Nov 2009 | JP | national |
| 2010-244603 | Oct 2010 | JP | national |
