Image formation device
The image forming device addresses visibility and operational ease by using interlocking paper guides that move in conjunction, ensuring clear access to the paper transport path and simplifying the closing process.
Patent Information
- Application Number
- JP2024011748
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-08-12
AI Technical Summary
Conventional image forming devices face issues with reduced visibility of the paper transport path due to multiple paper guides obscuring each other when opened, and the cumbersome operation of sequentially opening and closing both a door and a paper guide.
The device employs a first and second paper guide that move in conjunction with each other, where the first guide opens when the door is opened and the second guide opens when the first guide is closed, facilitated by an interlocking mechanism and locking system.
Ensures wide visibility of the paper transport path by expanding the movable range of each guide and preventing one guide from obstructing the other, improving operational ease by automating the closure of both guides with the door.
Smart Images

Figure 2025117075000001_ABST
Abstract
Description
[Technical Field]
[0001] The present disclosure relates to an image forming apparatus equipped with a paper guide that guides paper. [Background technology]
[0002] Image forming devices may be provided with a door to open the inside of the device to prevent paper jams when transporting paper or to perform maintenance, etc. In addition, in image forming devices, a paper guide is provided in the paper transport path along which paper is transported, covering the space through which paper is transported. When a paper guide is provided, a configuration in which the paper guide can be opened and closed is adopted in consideration of dealing with paper jams, etc. When an image forming device is provided with both a door and a paper guide, the two must be opened and closed in sequence, which makes the operation cumbersome and can lead to the user forgetting to close one of them. Therefore, an image forming device has been proposed in which both the door and the paper guide can be easily closed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-19177 Summary of the Invention [Problem to be solved by the invention]
[0004] A conventional image forming apparatus includes a door that is supported on the apparatus body so as to be rotatable open and closed, and an opening / closing member that is supported inside the door so as to be rotatable open and closed around a rotation axis, and an internal sheet transport path is opened by opening the door and the opening / closing member. Furthermore, the image forming apparatus is provided with an opening / closing member closing means that rotates the opening / closing member in a closing direction in conjunction with the movement of closing the door from a state in which the door and the opening / closing member are both open.
[0005] However, in image forming devices, the paper transport path can be long, and a single paper guide alone cannot cover a wide area of the paper transport path. However, when multiple paper guides are installed, the visibility of the area corresponding to one paper guide is reduced when the other paper guide is opened, which is an issue.
[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an image forming apparatus that can ensure visibility of the paper transport path. [Means for solving the problem]
[0007] The image forming device of the present disclosure is an image forming device that includes a paper transport path along which paper is transported, an opening / closing door that opens and closes relative to the device body, and a first paper guide and a second paper guide that form the paper transport path and guide the paper, and is characterized in that when the opening / closing door is opened, the first paper guide moves to open the paper transport path, and when the first paper guide that opens the paper transport path is moved to block the paper transport path, the second paper guide moves to open the paper transport path.
[0008] The image forming apparatus according to the present disclosure may be configured to include a linking mechanism that links the first paper guide and the second paper guide.
[0009] In the image forming device according to the present disclosure, the interlocking mechanism may be configured not to interlock when the first paper guide is opened, but to interlock with the second paper guide when the first paper guide is closed.
[0010] In the image forming device according to the present disclosure, the device main body may have a locking portion that locks the blocked first paper guide, and the opening / closing door may have a locking release portion that releases the locking of the first paper guide at the locking portion when the door is opened or closed relative to the device main body.
[0011] In the image forming apparatus according to the present disclosure, the first paper guide and the second paper guide may be arranged separately on the upstream side and the downstream side in the paper transport direction on the paper transport path.
[0012] In the image forming apparatus according to the present disclosure, the first paper guide and the second paper guide may be configured so that one end is pivotally supported and the other end is rotatable so as to open.
[0013] In the image forming apparatus according to the present disclosure, the first paper guide and the second paper guide may be configured to be movable so as to block the paper transport path when pressed by the opening / closing door that is closed relative to the apparatus body. [Effects of the Invention]
[0014] According to the present disclosure, instead of providing one large paper guide, by dividing it into two paper guides, the movable range of each paper guide can be widened and the visibility of the paper transport path when opened can be ensured. Also, by moving them in conjunction with each other, one paper guide is closed and the other paper guide is opened, so it is possible to avoid the situation where one paper guide is hidden by the other paper guide and the other side becomes difficult to see. [Brief explanation of the drawings]
[0015] [Figure 1] 1 is a schematic cross-sectional view illustrating a configuration of an image forming apparatus according to an embodiment of the present disclosure. [Figure 2] FIG. 4 is a schematic side view showing a part of the paper transport path when the door is closed. [Figure 3] FIG. 2 is a schematic side view showing the vicinity of the locking portion as viewed from inside the device body. [Figure 4] FIG. 10 is a schematic side view showing a part of the paper transport path when the door is in the middle of being opened. [Figure 5] FIG. 4 is a schematic side view showing a part of the paper transport path with the door open. [Figure 6] 10 is a schematic side view showing a part of the paper transport path with the first paper guide closed. FIG. DETAILED DESCRIPTION OF THE INVENTION
[0016] Hereinafter, an image forming apparatus according to an embodiment of the present disclosure will be described with reference to the drawings.
[0017] FIG. 1 is a schematic cross-sectional view showing the configuration of an image forming apparatus according to an embodiment of the present disclosure.
[0018] The image forming device 100 is a multifunction device having a copy function, a scanner function, a facsimile function, and a printer function, and transmits an image of a document read by the image reading device 130 to an external device, and forms an image of a document read by the image reading device 130 or an image received from an external device in color or monochrome on a recording medium such as paper.
[0019] An original transport device 110 that is supported so as to be able to open and close freely is provided above the image reading device 130. The original transport device 110 transports one or more originals one by one. The image reading device 130 scans a scanning optical system 130b to read an original placed on an original placement table 130a, or reads an original transported by the original transport device 110 to generate image data.
[0020] The image forming apparatus 100 includes a fixing device 1, a developing device 2, a photosensitive drum 3, a drum cleaning device 4, a charger 5, an intermediate transfer belt device 7, a secondary transfer device 11, an optical scanning device 12, and a paper feed section 18.
[0021] Image forming apparatus 100 handles image data corresponding to color images using black (K), cyan (C), magenta (M), and yellow (Y), or monochrome images using a single color (e.g., black). Image forming apparatus 100 is provided with four developing devices 2, four photosensitive drums 3, four drum cleaning devices 4, and four chargers 5 for forming four types of toner images, and four image stations Pa, Pb, Pc, and Pd are configured corresponding to black, cyan, magenta, and yellow, respectively.
[0022] The optical scanning device 12 exposes the surface of the photosensitive drum 3 to light to form an electrostatic latent image. The developing device 2 develops the electrostatic latent image on the surface of the photosensitive drum 3 to form a toner image on the surface of the photosensitive drum 3. The drum cleaning device 4 removes and collects residual toner on the surface of the photosensitive drum 3. The charger 5 uniformly charges the surface of the photosensitive drum 3 to a predetermined potential. Through the series of operations described above, a toner image of each color is formed on the surface of each photosensitive drum 3.
[0023] The intermediate transfer belt device 7 includes an intermediate transfer roller 6, an endless intermediate transfer belt 71, an intermediate transfer drive roller 72, an intermediate transfer driven roller 73, and a cleaning device 9. Four intermediate transfer rollers 6 are provided inside the intermediate transfer belt 71 so as to form four types of toner images corresponding to each color. The intermediate transfer rollers 6 transfer the toner images of each color formed on the surface of the photosensitive drum 3 onto the intermediate transfer belt 71, which moves around in a circular motion.
[0024] The intermediate transfer belt 71 is stretched over an intermediate transfer drive roller 72 and an intermediate transfer driven roller 73. In the image forming apparatus 100, the toner images of each color formed on the surface of each photosensitive drum 3 are sequentially transferred and superimposed to form a color toner image on the surface of the intermediate transfer belt 71. The cleaning device 9 removes and collects waste toner remaining on the surface of the intermediate transfer belt 71 without being transferred to paper.
[0025] The secondary transfer device 11 sandwiches and transports a sheet of paper transported through the paper transport path 21 in the transfer nip portion TN between the secondary transfer roller 11a and the intermediate transfer belt 71. When the sheet of paper passes through the transfer nip portion TN, the toner image on the surface of the intermediate transfer belt 71 is transferred onto the sheet of paper, and the sheet of paper is transported to the fixing device 1.
[0026] The fixing device 1 includes a fixing belt 31 that rotates around an axis and a pressure roller 32. The fixing device 1 sandwiches a sheet of paper onto which a toner image has been transferred in a nip portion N between the fixing belt 31 and the pressure roller 32, and applies heat and pressure to fix the toner image to the sheet of paper.
[0027] The paper feed unit 18 includes a paper feed cassette that holds recording media (paper) used for image formation, and is provided below the optical scanning device 12. The paper is pulled out of the paper feed unit 18 by a pickup roller 16 and transported to a paper transport path 21. The paper transported to the paper transport path 21 passes through the secondary transfer device 11 and the fixing device 1, and is then discharged to a paper output tray 19 by a discharge roller 17.
[0028] Conveyance rollers 13, registration rollers 14, and discharge rollers 17 are arranged on paper conveyance path 21. Conveyance rollers 13 facilitate the conveyance of paper. Registration rollers 14 convey paper at a speed equal to the process speed at which an image is formed on the paper. Registration rollers 14 are provided between paper feed unit 18 and secondary transfer device 11, and adjust the timing of paper conveyance so that the toner image is transferred to the paper by secondary transfer device 11. For example, registration rollers 14 wait (temporarily stop) while clamping paper conveyed from paper feed unit 18, and then start conveying the paper at a constant speed in synchronization with secondary transfer device 11.
[0029] When an image is to be formed on the back side of the paper in addition to the front side, the conveying direction of the paper is changed by discharge rollers 17, and the paper is conveyed to reversing conveying path 22. In reversing conveying path 22, the paper is guided up to registration rollers 14 in a reversed state by reversing conveying rollers 15. Image forming apparatus 100 forms an image on the back side of the paper guided to registration rollers 14 in the same manner as on the front side, and discharges the paper to discharge tray 19.
[0030] Image forming apparatus 100 is provided with an opening / closing door 140 (see FIG. 2) that opens and closes relative to the apparatus main body. Also, paper guides that guide paper are provided in the above-mentioned paper transport path 21, and a main body guide unit 120 (part of the apparatus main body) is provided on the apparatus main body side along paper transport path 21, and a first paper guide 50 and a second paper guide 60 are provided on the opening / closing door 140 side. For ease of explanation below, first paper guide 50 and second paper guide 60 may be simply referred to as paper guides.
[0031] Next, the structure of part of paper transport path 21, in the vicinity of first paper guide 50 and second paper guide 60, will be described with reference to FIGS. 2 and 3. FIG.
[0032] FIG. 2 is a schematic side view showing a part of the paper transport path when the door is closed.
[0033] Main body guide section 120 is part of the housing that constitutes the device main body, and serves as a wall that separates the inside of the device main body from paper transport path 21. First paper guide 50 and second paper guide 60 are plate-shaped members that are arranged opposite main body guide section 120, and the space sandwiched between first paper guide 50, second paper guide 60 and main body guide section 120 serves as paper transport path 21.
[0034] In this embodiment, the first paper guide 50 and the second paper guide 60 are arranged to face the portion of the paper transport path 21 that extends in the vertical direction, and the paper is transported from bottom to top. In the paper transport direction, the first paper guide 50 is arranged downstream, and the second paper guide 60 is arranged upstream. In other words, the first paper guide 50 is located at the top, and the second paper guide 60 is located below the first paper guide 50.
[0035] First paper guide 50 and second paper guide 60 are configured to be movable so as to switch between a state in which the corresponding portion of paper transport path 21 is open (open state) and a state in which the corresponding portion of paper transport path 21 is blocked (blocked state). Note that when the paper guide blocks paper transport path 21, it maintains its position to provide a predetermined gap with respect to main body guide unit 120, ensuring space for paper to pass through. For ease of explanation below, the open state of the paper guide may be referred to as the paper guide being open, and the blocked state of the paper guide may be referred to as the paper guide being closed.
[0036] In this embodiment, the paper guides are configured such that one end is pivotally supported and the other end pivots to open. Specifically, the first paper guide 50 has a first pivot support 51 at its lower end pivoted to the device body, and its upper end pivots to open away from the body-side guide 120. The second paper guide 60 has a second pivot support 61 at its lower end pivoted to the device body, and its upper end pivots to open away from the body-side guide 120. By employing paper guides that pivot around one end as a fulcrum, a structure can be achieved that easily switches between opening and closing the paper transport path 21. By arranging the first paper guide 50 and the second paper guide 60 in this manner and employing a structure in which each pivots around one end as a fulcrum, the angle of rotation of the paper guide in the opening direction can be increased compared to a configuration with only one paper guide, even when the image forming apparatus 100 is installed against a wall and sufficient clearance is not provided.
[0037] The opening / closing door 140 is disposed opposite the main body guide section 120, sandwiching the first paper guide 50 and the second paper guide 60 therebetween. The opening / closing door 140 is attached to the device main body via a holding mechanism (not shown), and has a sliding structure that moves linearly in the horizontal direction to approach and separate from the device main body.
[0038] The first paper guide 50 is configured to be locked to the device body in the closed state. Specifically, a guide engagement portion 52 extending toward the body-side guide portion 120 is provided at the upper end of the first paper guide 50. The body-side guide portion 120 is provided with a locking portion 121 at a position corresponding to the guide engagement portion 52. The guide engagement portion 52 has an engagement claw 52a at its tip that is shaped like a claw and hooks onto the locking portion 121, and is connected to the first paper guide 50 by an engagement extension portion 52b that extends to the engagement claw 52a. The locking portion 121 is a protrusion that extends toward the inside of the device body. Note that FIG. 2 shows a state in which the guide engagement portion 52 is unlocked from the locking portion 121, while FIG. 5, described later, shows a state in which the guide engagement portion 52 is locked to the locking portion 121. As shown in Figure 2, when the engagement with the engagement portion 121 is released, the first paper guide 50 attempts to rotate in the opening direction, but the opening / closing door 140 is present in the opening direction, and the first paper guide 50 is received by the opening / closing door 140, thereby maintaining a closed state relative to the main body side guide portion 120.
[0039] The opening / closing door 140 is provided with an unlocking portion 141 extending toward the main body side guide portion 120 at a position corresponding to the locking portion 121. In this embodiment, the unlocking portion 141 is provided so as to be located below the guide engagement portion 52 when the opening / closing door 140 is closed. The unlocking portion 141 has a release protrusion 141a at its tip that protrudes toward the engagement claw 52a (upward), and is connected to the opening / closing door 140 by a release extension portion 141b that extends to the release protrusion 141a. The positional relationship between the locking portion 121, the guide engagement portion 52, and the unlocking portion 141 will be described later with reference to FIG. 3.
[0040] In this embodiment, the guide engagement portion 52 is made of an elastic material, and when pressed by another member, it bends and deforms. However, the guide engagement portion 52 is not limited to this, and may be configured to rotate around the base connected to the first paper guide 50 as a fulcrum.
[0041] The first paper guide 50 and the second paper guide 60 are connected to an interlocking mechanism 80 that interlocks their movements. When one paper guide is moved to close, the interlocking mechanism 80 interlocks the other paper guide to open. The operation of the interlocking mechanism 80 will be described later with reference to Figures 4 to 6. In this embodiment, the interlocking mechanism 80 is configured by combining pulleys, gears, and belts, and is connected to the first shaft support portion 51 and the second shaft support portion 61. However, the interlocking mechanism 80 is not limited to this, and may be configured by appropriately combining other parts, such as a rack and pinion.
[0042] FIG. 3 is a schematic side view showing the vicinity of the locking portion as viewed from inside the device body.
[0043] 3 corresponds to FIG. 2 and shows the state in which the vicinity of the locking portion 121 in the main body side guide portion 120 is viewed from inside the device main body. In the main body side guide portion 120, the vicinity of the locking portion 121 is opened to form a guide opening 120a.
[0044] The locking portion 121 is provided on the edge of the guide opening 120a. As shown in Fig. 3, the edge may be extended to fit inside the guide opening 120a and the locking portion 121 may be provided at the end thereof, thereby adjusting the position of the locking portion 121 relative to the guide opening 120a. The locking portion 121 may be located at a position that does not interfere with the lock release portion 141, and may be provided in two places as shown in Fig. 3.
[0045] The unlocking portion 141 is disposed so as to pass through the guide opening 120a and between the two locking portions 121. The upper end of the unlocking protrusion 141a of the unlocking portion 141 extends above the locking portion 121, and pushes up the engaging claw 52a of the guide engaging portion 52 from below.
[0046] The guide engagement portion 52 is inserted into the inside of the device body through the guide opening 120a and is positioned above the locking release portion 141. As shown in FIG. 3, the engagement claw 52a is separated from the locking portion 121 when pushed up by the release protrusion 141a. The engagement claw 52a is wider than the release protrusion 141a (locking release portion 141) and has a width that reaches the locking portion 121 located to the side of the release protrusion 141a. Therefore, as will be described later, when the release protrusion 141a is not present below the engagement claw 52a, the downwardly moved engagement claw 52a enters deeper than the locking portion 121 and gets caught there. As described above, the locking portion 121 is positioned so that it does not interfere with the locking release portion 141 but interferes with the engagement claw 52a.
[0047] FIG. 4 is a schematic side view showing a part of the paper transport path when the door is in the middle of being opened.
[0048] 2, the state of the door 140 has changed to that shown in FIG. 4, with the door 140 sliding in a direction (to the right in FIG. 4) away from the main body guide portion 120. The first paper guide 50 is released from the locking portion 121, and the door 140, which had been holding the first paper guide 50, is now separated from the door 140, so that the first paper guide 50 rotates in the opening direction (in the direction of arrow A1 in FIG. 4).
[0049] In this embodiment, the interlocking mechanism 80 does not interlock when opening the first paper guide 50, but interlocks the second paper guide 60 when closing the first paper guide 50. Therefore, even when the first paper guide 50 rotates in the opening direction, the second paper guide 60 does not rotate and remains closed relative to the main body guide unit 120. The interlocking mechanism 80 can limit the interlocking direction by using, for example, a torque limiter, a reverse prevention latch, or a reverse prevention clutch. In this way, by limiting the interlocking direction of the interlocking mechanism 80, the paper guides can be moved at the appropriate timing.
[0050] FIG. 5 is a schematic side view showing a part of the paper transport path when the door is open.
[0051] 5 shows a change from the state shown in FIG. 4 to one in which the opening / closing door 140 is further opened, with the opening / closing door 140 sliding away from the main body guide unit 120 (to the right in FIG. 5) and then stopping. The first paper guide 50 rotates in a direction that opens further than the state shown in FIG. 4 (in the direction of arrow A1 in FIG. 5) and then stops, restricted by a portion not shown. As shown in FIG. 5, when the first paper guide 50 is open, the portion of the paper transport path 21 that corresponds to the first paper guide 50 is exposed, and a paper jam in the paper transport path 21 can be cleared by inserting a hand from above the first paper guide 50, for example.
[0052] FIG. 6 is a schematic side view showing a part of the paper transport path with the first paper guide closed.
[0053] 6 shows the state of the first paper guide 50 changing from that shown in FIG. 5 to that of closing, with the first paper guide 50 rotating in a direction approaching the main body side guide section 120 (in the direction of arrow A2 in FIG. 6). When the first paper guide 50 is rotated and the guide engagement section 52 is locked with the locking section 121, the first paper guide 50 is maintained in a closed state relative to the main body side guide section 120.
[0054] When the first paper guide 50 is rotated in the closing direction, the interlocking mechanism 80 interlocks the second paper guide 60 to rotate in the opening direction. As a result, the second paper guide 60 rotates in the opening direction (the direction of arrow B in FIG. 6 ) and then stops, restricted by a portion (not shown). As shown in FIG. 6 , when the second paper guide 60 is open, the portion of the paper transport path 21 corresponding to the second paper guide 60 is exposed, allowing a user to insert their hand from above the second paper guide 60 to clear a paper jam in the paper transport path 21. At this time, the first paper guide 50, which is located above the second paper guide 60, is closed and does not block the view above the second paper guide 60, ensuring visibility of the paper transport path 21.
[0055] When the opening / closing door 140 is closed from the state shown in FIG. 6, the second paper guide 60 is pressed by the closing opening / closing door 140 and rotates in the closing direction (the direction opposite to arrow B), transitioning to a closed state relative to the main body guide unit 120 as shown in FIG. 2. Similarly, when the opening / closing door 140 is closed from the state shown in FIG. 5, the first paper guide 50 is pressed by the closing opening / closing door 140 and rotates in the closing direction (the direction of arrow A2), transitioning to a closed state relative to the main body guide unit 120 as shown in FIG. 2. In other words, the first paper guide 50 and the second paper guide 60 are pressed by the opening / closing door 140 that is closed relative to the device main body, and move to block the paper transport path 21. In this way, the paper guides are automatically closed when the opening / closing door 140 is closed, reducing the user's effort and improving operability.
[0056] In this embodiment, when the opening / closing door 140 is opened, the first paper guide 50 moves to open the paper transport path 21. Then, when the first paper guide 50 that opens the paper transport path 21 is moved to close the paper transport path 21, the second paper guide 60 moves to open the paper transport path 21. In this way, by dividing the paper guide into two instead of providing one large paper guide, the movable range of each paper guide is widened, ensuring visibility of the paper transport path 21 when opened. Furthermore, by moving the paper guides in conjunction with each other, one paper guide is closed while the other is open, preventing one paper guide from being obscured by the other and obscuring its visibility. Furthermore, the provision of the interlocking mechanism 80 allows the movement of one paper guide to be smoothly transmitted to the other paper guide.
[0057] As described above, the first paper guide 50 can be easily maintained in a closed state by providing the locking portion 121. In addition, by providing the locking release portion 141 and releasing the lock at the locking portion 121, a structure can be achieved in which the first paper guide 50 opens automatically when the opening / closing door 140 is opened.
[0058] By arranging the two paper guides separately as in this embodiment, a wide range in the transport direction can be supported, and paper jams can be cleared by opening the corresponding paper guide.
[0059] In this embodiment, the first paper guide 50 is positioned at the top and the second paper guide 60 is positioned at the bottom, but this is not limited to this, and the positions of the first paper guide 50 and the second paper guide 60 may be swapped.
[0060] Furthermore, the unlocking portion 141 and the guide engaging portion 52 may be provided with an inclined portion that is inclined with respect to the moving direction of the opening / closing door 140 (unlocking portion 141) at the portion where they come into contact (for example, the engaging claw 52a and the releasing protrusion 141a). By providing the inclined portion, the engaging claw 52a can be smoothly pushed up when the releasing protrusion 141a comes into contact.
[0061] The positions of the locking portion 121, the unlocking portion 141, and the guide engaging portion 52 may be interchanged as appropriate, and may be formed in different shapes depending on their arrangement.
[0062] It should be noted that the embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present disclosure should not be interpreted solely by the above-described embodiments, but should be defined based on the claims. Furthermore, all modifications within the scope and meaning equivalent to the claims are included. [Explanation of symbols]
[0063] 21 Paper transport path 50 First Paper Guide 51 1st axis branch 52 guide engagement portion 60 Second Paper Guide 61 2nd axis branch 80 Interlocking mechanism 100 Image forming device 120 Main body guide 121 Locking part 140 Opening and Closing Doors 141 Unlocking part
Claims
1. a paper transport path along which paper is transported; an opening / closing door that opens and closes relative to the device body; an image forming apparatus including a first paper guide and a second paper guide that configure the paper transport path and guide the paper, When the door is opened, the first paper guide moves to open the paper transport path, When the first paper guide that opens the paper transport path is moved to close the paper transport path, the second paper guide is moved to open the paper transport path. An image forming apparatus comprising:
2. 2. The image forming apparatus according to claim 1, The first paper guide and the second paper guide are interlocked with each other by a linking mechanism. An image forming apparatus comprising:
3. 3. The image forming apparatus according to claim 2, The interlocking mechanism does not interlock when the first paper guide is opened, and interlocks the second paper guide when the first paper guide is closed. An image forming apparatus comprising:
4. 2. The image forming apparatus according to claim 1, the device body has a locking portion that locks the closed first paper guide, The opening and closing door has a locking release portion that releases the locking of the first paper guide at the locking portion when the opening and closing door is opened or closed relative to the device body. An image forming apparatus comprising:
5. 2. The image forming apparatus according to claim 1, The first paper guide and the second paper guide are arranged separately on the upstream side and the downstream side in the paper transport direction on the paper transport path. An image forming apparatus comprising:
6. 2. The image forming apparatus according to claim 1, The first paper guide and the second paper guide are pivotally supported at one end and pivotally moved so that the other end opens. An image forming apparatus comprising:
7. 2. The image forming apparatus according to claim 1, The first paper guide and the second paper guide are pressed by the door that is closed relative to the device body, and move to close the paper transport path. An image forming apparatus comprising:
Citation Information
Patent Citations
Sheet conveyer and picture forming device
JP2001019177A