Sheet conveyance device and image reading device

Abstract

To provide a configuration in which a feed roller can be easily attached and detached while a regulating guide for regulating a width direction of a sheet is brought close to the feed roller.SOLUTION: A regulation guide 111 which regulates a width direction of a sheet loaded on a feeding tray has a first guide member 111a and a second guide member 111b provided on the first guide member 111a, the second guide member 111b is displaced between a regulation position and a retreat position on an upstream side in a conveyance direction D1 and retracted from a movement locus β of a cover member 106. When an upper unit 103 is opened, the second guide member 111b is no longer engaged with the upper unit 103, and since the second guide member is urged by a compression spring 113 toward the upstream side in the conveyance direction D1, the second guide member moves to the retreat position. When the upper unit 103 is in a closed state, even if the second guide member is urged by the compression spring 113 toward the upstream side in the conveyance direction D1, the second guide member is engaged with the upper unit 103 and held in the regulation position.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a sheet transport device that transports a sheet, and an image reading device that includes the sheet transport device and reads an image from the sheet. [Background technology]

[0002] As a sheet conveying device, there is a device that conveys sheets loaded on a feed tray (loading section) into the device using a feed roller (conveying means). The feed tray is provided with a pair of regulating guides (regulating sections) that regulate the width direction of the sheets. In addition, in such a device, a cover member that covers the periphery of the feed roller is provided so as to be freely opened and closed in order to attach and detach the feed roller. The cover member is provided with a finger hook portion such as a hole or a concave and convex portion so that a user can hook his or her finger when opening and closing the cover.

[0003] Here, it is preferable to place the regulating guide as close to the feed roller as possible in order to prevent a sheet, particularly a sheet with a short length in the conveying direction, from being conveyed obliquely. However, if the regulating guide is placed close to the feed roller, when the regulating guide is in a position where it overlaps with the cover member, the cover member will abut against the regulating guide and the cover member cannot be opened. Therefore, a regulating guide has been proposed in which the regulating guide is divided into two parts, an upstream regulating guide and a downstream regulating guide, and the downstream regulating guide is arranged to be rotatable relative to the upstream regulating guide. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-031025 Summary of the Invention [Problem to be solved by the invention]

[0005] With the above configuration, even if the restricting guide is in a position overlapping the cover member, when the cover member hits the downstream restricting guide, the downstream restricting guide rotates, so the cover member can be opened. However, in reality, with the above configuration, if the restricting guide is in a position overlapping the finger hook of the cover member, the cover member cannot be opened. Also, even if the finger hook is not in a position overlapping the restricting guide, there is a possibility that the rotated downstream restricting guide will interfere with the hand and hinder the movement of the restricting guide when the cover member is opened.

[0006] An object of the present invention is to provide a configuration in which the feed roller can be more easily attached and detached while the regulating guide is brought closer to the feed roller. [Means for solving the problem]

[0007] In view of the above, a sheet conveying device and an image reading device according to the present invention are It consists of an upper unit and a lower unit. A loading section for loading sheets; a feeding mechanism including a roller on the upper unit side and a roller on the lower unit side, the roller feeding the sheet stacked on the stacking section to a conveying path; a cover member that is rotatable between a closed position that covers the periphery of the rollers on the lower unit side of the feeding mechanism and forms a conveying surface for the sheet and an open position that allows the rollers on the lower unit side to be detached; a regulating portion that regulates a width direction of the sheets loaded on the loading portion, the upper unit is rotatably attached to face the lower unit so as to be displaceable between an open state and a closed state, The regulating portion is provided with a biasing member that biases the regulating portion upstream in the conveying direction of the sheet, and when the upper unit is in the unfolded state, it is in a retracted position where it is retracted from the movement trajectory of the cover member from the closed position to the open position due to the biasing force of the biasing member, and when the upper unit is in the closed state, it is in a regulating position where at least a portion of the regulating portion overlaps with the movement trajectory of the cover member by abutting against the upper unit. Effect of the Invention

[0008] According to the present invention, the feed roller can be more easily attached and detached without being hindered by the regulating guide while moving the regulating guide closer to the feed roller. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a schematic configuration of an image reading apparatus according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a control block diagram of the image reading apparatus according to the embodiment. [Diagram 3] FIG. 2 is a top view of the image reading apparatus according to the embodiment. [Figure 4] FIG. 2 is a schematic cross-sectional view of the image reading apparatus according to the embodiment with the discharge tray closed. [Diagram 5] FIG. 2 is a schematic cross-sectional view of the image reading apparatus according to the embodiment with an upper unit in an expanded state. [Figure 6] 4 is a perspective view of the lower unit in the embodiment with the cover member closed and the restriction guide in the first position. FIG. [Figure 7] 4 is a perspective view of the lower unit with the cover member open and the restriction guide located at a first position according to the embodiment; FIG. [Figure 8] 13 is a perspective view of the lower unit in the embodiment with the cover member open and the restriction guide in the second position. FIG. [Figure 9] 4 is a perspective view of an upper and lower portion of the restriction guide according to the embodiment of the present invention when expanded; FIG. [Figure 10] 4 is a cross-sectional view of the regulating guide according to the embodiment, as viewed from the downstream side in the transport direction. FIG. [Figure 11] FIG. 4 is a side view of the vicinity of the feed roller with the upper unit closed according to the embodiment. [Figure 12] FIG. 4 is a side view of the vicinity of the feed roller with the upper unit opened according to the embodiment. [Figure 13] 13 is a side view of the vicinity of the feed roller in a state where the upper unit according to the embodiment begins to abut against the regulating guide in the middle of closing. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] This embodiment will be described with reference to Figures 1 to 13. First, a schematic configuration of an image reading device according to this embodiment will be described with reference to Figure 1.

[0011] <Image reader> The image reading device 100 is a device that conveys one or more sheets (conveying media, originals) S loaded on a feed tray 110 serving as a loading section one by one through a path RT into the device, reads the images, and discharges the sheets to a discharge tray 2. The sheets S to be read are, for example, office paper, checks, business cards, cards, etc., and may be thick or thin sheets. Cards include, for example, insurance cards, driver's licenses, credit cards, etc. Furthermore, the sheets S also include booklets such as passports. When a booklet is the target, for example, a booklet can be placed in a transparent holder in a double-open state and placed on the feed tray 110, whereby the booklet can be conveyed together with the holder and its image can be read.

[0012] <Feeding> A first conveying section 10 is provided as a feeding mechanism for feeding the sheet S to the conveying path. The first conveying section 10 includes a feed roller 11 and a separation roller 12 disposed at a position opposite to the feed roller 11, and conveys the sheets S placed on the feed tray 110 one by one in a conveying direction D1. The conveying direction D1 is inclined at a predetermined angle with respect to the placement surface of the image reading device 100, and the sheet S placed on the feed tray 110 is supplied to the feeding mechanism by its own weight. A driving force is transmitted from a driving section 3 such as a motor through a transmission section 5 to the feed roller 11, and the feed roller 11 is driven to rotate in the direction of the arrow in the figure (the positive direction for conveying the sheet S along the path RT). The transmission section 5 is, for example, an electromagnetic clutch, and is capable of connecting and disconnecting the driving force from the driving section 3 to the feed roller 11 (transmission and interruption of the driving force).

[0013] <Drive unit> In this embodiment, the transmission unit 5 that connects the drive unit 3 and the feed roller 11 is in a state in which the driving force is normally transmitted, and the driving force is interrupted when the sheet S is reversed or stopped. When the transmission of the driving force is interrupted by the transmission unit 5, the feed roller 11 is in a state in which it can rotate freely. Note that such a transmission unit 5 does not need to be provided when the feed roller 11 is driven in only one direction.

[0014] <Separated structure> The separation roller 12, which is disposed opposite the feed roller 11, is a roller for separating the sheets S one by one, and is in contact with the feed roller 11 with a constant pressure. To ensure this state of contact, the separation roller 12 is provided so as to be swingable and configured so as to be biased toward the feed roller 11. A driving force is transmitted to the separation roller 12 from the drive unit 3 via a torque limiter 12a, and the separation roller 12 is driven to rotate in the direction of the solid arrow (the opposite direction to the forward direction of the feed roller 11).

[0015] Since the transmission of driving force is restricted by the torque limiter 12a, the separation roller 12 rotates in a direction (indicated by a dashed arrow) in association with the feed roller 11 when in contact with the feed roller 11. When multiple sheets are conveyed to the pressure contact portion (nip portion) between the feed roller 11 and the separation roller 12, the separation roller blocks all but one sheet from being conveyed downstream. In other words, the separation roller 12 separates the remaining sheets from the multiple sheets conveyed toward the nip portion between the feed roller 11 and the separation roller 12 so that the feed roller 11 can feed the sheets one by one from the multiple sheets.

[0016] In this embodiment, the separation mechanism is constituted by the separation roller 12 and the feed roller 11, but such a separation mechanism is not necessarily provided, and any feed mechanism that sequentially feeds the sheets one by one to the conveying path will suffice. In addition, when a separation mechanism is provided, instead of a configuration such as the separation roller 12, a separation pad that applies friction to the sheet S may be pressed against the feed roller 11 to provide a similar separation function.

[0017] <Conveyor structure> The second conveying section 20, which serves as a conveying mechanism located downstream of the first conveying section 10 in the conveying direction D1, includes a drive roller 21 and a driven roller 22 driven by the drive roller 21, and conveys the sheet S conveyed from the first conveying section 10 downstream in the conveying direction D1. A driving force is transmitted to the drive roller 21 from a drive section 4 such as a motor, and the drive roller 21 is driven to rotate in the direction of the arrow in the figure. The driven roller 22 is in contact with the drive roller 21 with a constant pressure, and rotates together with the drive roller 21. The driven roller 22 may be configured to be biased against the drive roller 21 by a biasing unit (not shown) such as a spring.

[0018] The third conveying section 30, which is located downstream of the second conveying section 20 in the conveying direction, includes a drive roller 31 and a driven roller 32 driven by the drive roller 31, and conveys the sheet S conveyed from the second conveying section 20 to the discharge tray 2. In other words, the third conveying section 30 functions as a discharge mechanism.

[0019] A driving force is transmitted from a driving unit 4 such as a motor to the driving roller 31, and the driving roller 31 is rotated in the direction of the arrow in the figure. The driven roller 32 is pressed against the driving roller 31 with a constant pressure, and rotates together with the driving roller 31. The driven roller 32 may be configured to be biased against the driving roller 31 by a biasing unit (not shown) such as a spring.

[0020] The discharge tray 2 is pivotally supported via a first hinge 101 provided below the device body 100A so as to be rotatable relative to the device body 100A of the image reading device 100. Also, it is composed of a first discharge tray 2a on the first hinge 101 side and a first extension tray 2b connected to its tip side. The first extension tray 2b is supported so as to be slidable relative to the first discharge tray 2a.

[0021] <Image reading structure and control> Here, in the image reading device 100 of this embodiment, since an image is read by an image reading unit 70 as an image reading section disposed between the second conveying section 20 and the third conveying section 30, the second conveying section 20 and the third conveying section 30 convey the sheet S at a constant speed. By always setting the conveying speed to be equal to or higher than the conveying speed of the first conveying section 10, it is possible to reliably prevent the succeeding sheet S from catching up with the preceding sheet S. For example, in this embodiment, the conveying speed of the sheet S by the second conveying section 20 and the third conveying section 30 is controlled to be faster than the conveying speed of the sheet S by the first conveying section 10.

[0022] <Control Unit> The control unit 80 of the image reading device 100 of this embodiment will be described with reference to Fig. 2. Fig. 2 is a block diagram of the control unit 80.

[0023] The control unit 80 includes a CPU 81, a storage unit 82, an operation unit 83, a communication unit 84, and an interface unit 85. The CPU 81 executes a program stored in the storage unit 82 to control the entire image reading device 100. The storage unit 82 is composed of, for example, a RAM, a ROM, etc. The operation unit 83 is composed of, for example, a switch, a touch panel, etc., and accepts operations from an operator.

[0024] The communication unit 84 is an interface for communicating information with an external device. If the external device is a PC (personal computer), the communication unit 84 is, for example, a USB interface or a SCSI interface. In addition to such an interface for wired communication, the communication unit 84 may be an interface for wireless communication, or may include interfaces for both wired communication and wireless communication.

[0025] The interface unit 85 is an I / O interface that performs data input / output with the actuator 86 and the sensor 87. The actuator 86 includes a drive unit 3, a drive unit 4, a transmission unit 5, etc. The sensor 87 includes, in addition to the double-feed detection sensor 40 for detecting that a plurality of sheets have overlapped and passed through the first conveyance unit 10, a medium detection sensor 50 and 60 for detecting the position of the sheet S, an image reading unit 70, etc.

[0026] <Drive by receiving a start instruction from a PC> The basic operation of the image reading apparatus 100 will be described. When the control unit 80 receives an image reading start instruction from, for example, an external personal computer (PC) to which the image reading apparatus 100 is connected, the control unit 80 starts driving the first conveyance unit 10, the second conveyance unit 20, and the third conveyance unit 30. The sheet S stacked on the feed tray 110 is conveyed one by one from the lowermost sheet S.

[0027] Based on the detection result of the medium detection sensor 60, the control unit 80 starts reading an image of the sheet S conveyed by the second conveyance unit 20 by the image reading unit 70, temporarily stores the read image, and sequentially transmits it to the external personal computer. The sheet S for which the image has been read is discharged to the discharge tray 2 by the third conveyance unit 30, and the image reading process for that sheet S is completed.

[0028] <Details of the feed tray> FIG. 3 is a top view of the image reading apparatus 100 according to the present embodiment with the discharge tray 2 housed. The feed tray (mounting table) 110 is provided with a regulation guide 111 as a regulation unit that is slidably attached in the width direction D2 of the sheet S orthogonal to the conveyance direction D1 in accordance with the size of the sheet S to be mounted. Further, at the center of the feed tray 110, a feed extension tray 112 that can be pulled out and used is provided.

[0029] <Details of the upper unit and the lower unit> Figures 4 and 5 are schematic cross-sectional views of the image reading device 100 according to this embodiment. Note that since the internal configuration of the device is the same as that described in Figure 1, some reference numerals and configurations are omitted in Figures 4 and 5. Also, Figure 4 shows a state in which the upper unit 103 is closed, and Figure 5 shows a state in which the upper unit 103 is open.

[0030] The device body 100A of the image reading device 100 is composed of an upper unit 103 as a second unit and a lower unit 104 as a first unit. The lower unit 104 has a feed roller 11 and is a unit that forms the lower side of the transport path that constitutes the route RT of the device body 100A. On the other hand, the upper unit 103 has a separation roller 12 and is a unit that forms the upper side of the transport path of the device body 100A.

[0031] The upper unit 103 is movable relative to the lower unit 104 so as to be displaced between a closed state where the separation roller 12 is in a contact position (the state in FIG. 4) where it contacts the feed roller 11 and an unfolded state where the separation roller 12 is in a separated position (the state in FIG. 5) where it is separated from the feed roller 11. Specifically, the upper unit 103 is attached to the lower unit 104 so as to be rotatable about a main body hinge 105 as a fulcrum.

[0032] 5, when the upper unit 103 is in the unfolded state, for example, if a jam occurs in the conveying path due to a sheet S or the like, the jammed sheet S can be removed, and a user or a machine can directly handle the conveying path. In addition, the feed roller 11 and the separation roller 12 can be attached and detached with the upper unit 103 in the unfolded state.

[0033] <Details of the structure around the feed roller> Next, the configuration of the vicinity of the feed roller 11 of this embodiment will be described with reference to Figs. 6 to 8. Fig. 6 is a perspective view of the lower unit 104 with the cover member 106 closed, and the regulating guide 111 in a state where it is shifted to the inside (first position) in the width direction D2 of the sheet S. Fig. 7 is a perspective view of the lower unit 104 with the cover member 106 open, and the regulating guide 111 in a state where it is shifted to the inside (first position) in the width direction D2 of the sheet S. Fig. 8 is a perspective view of the lower unit 104 with the cover member 106 open, and the regulating guide 111 in a state where it is shifted to the outside (second position) in the width direction D2 of the sheet S. Note that Figs. 6 to 8 all show a state where the upper unit 103 of Fig. 5 is open, and the upper unit 103 is not shown.

[0034] 6 to 8, a cover member 106 is disposed around the feed roller 11. The cover member 106 is a member that forms a conveying surface (guide surface) Z for the sheet S around the feed roller 11, and also functions as a partial protective member for the feed roller 11. The cover member 106 is rotatable between a closed position (state shown in FIG. 6) where the cover member 106 covers the periphery of the feed roller 11 and forms the conveying surface Z for the sheet S, and an open position (state shown in FIGS. 7 and 8) where the feed roller 11 can be detached, without interfering with a regulating guide 111 described later.

[0035] Specifically, the cover member 106 is provided rotatable between a closed position and an open position about a shaft 106a parallel to the width direction D2 of the sheet S, and when rotating from the closed position to the open position, the upstream portion in the conveying direction D1 is raised about the shaft 106a. The cover member 106 is located at the closed position where it forms a conveying surface Z of the sheet S around the feed roller 11 except when the feed roller 11 is attached or detached, and is engaged with the lower unit 104 by an engagement mechanism (not shown).

[0036] The cover member 106 is provided with a notch 106b at the center in the width direction D2 and on the upstream side in the conveying direction D1. The notch 106b functions as a finger hook when opening the cover member 106. The notch 106b may be provided at both ends in the width direction D2. Instead of the notch, a concave-convex portion may be provided as the finger hook.

[0037] <Details of the Regulation Guide> Next, a description will be given of the regulating guide 111 that regulates the width direction D2 of the sheets S placed on the feed tray 110. The regulating guide 111 is slidable in the width direction D2 between a first position (the state in FIGS. 6 and 7) and a second position (the state in FIG. 8) that is further outward than the first position, and regulates the width direction D2 of the sheets S stacked on the feed tray 110.

[0038] The regulating guides 111 are disposed on both sides of the width direction D2 of the sheet S, and the interval between them can be changed according to the size of the sheet S. In this embodiment, the sheet S is transported with a so-called center reference, in which the center of the width direction D2 substantially coincides with the center of the feed tray 110 in the width direction D2. When one of the pair of regulating guides 111 is moved in accordance with the size of the sheet S in the width direction D2, the other regulating guide 111 also moves in conjunction with the one regulating guide 111. In this way, by regulating both sides of the sheet S in the width direction D2 with the pair of regulating guides 111, the sheet S is guided to just before the feed roller 11, and it is possible to prevent the sheet S from skewing during feeding.

[0039] Next, the configuration of the regulating guide 111 will be described with reference to Figures 9 and 10. Figure 9 is a perspective view in which the first guide member 111a and the second guide member 111b are developed. Figure 10 is a cross-sectional view of the regulating guide 111 as viewed from the downstream side in the conveying direction D1.

[0040] 9, the regulating guide 111 is composed of a first guide member 111a which is a first regulating member, a second guide member 111b which is a second regulating member, and a compression spring 113. The first guide member 111a has a groove portion 111c on the downstream side in the conveying direction D1 and a groove portion 111d on the upstream side in the conveying direction D1.

[0041] The second guide member 111b has a foot 111e on the downstream side in the conveying direction D1 and a foot 111f on the upstream side in the conveying direction D1. The second guide member 111b is assembled to the first guide member 111a so that the foot 111e fits into the groove 111c and the foot 111f fits into the groove 111d. A compression spring 113, which is a biasing member, is provided inside the regulating guide 111 and biases the second guide member 111b toward the upstream side in the conveying direction D1.

[0042] As shown in Fig. 10, the foot 111e of the second guide member 111b fits below the first guide member 111a. Although not shown in Fig. 10, the foot 111f of the second guide member 111b also fits below the first guide member 111a. For this reason, the second guide member 111b cannot move in the direction D3 in Fig. 10, that is, in the direction perpendicular to the surface of the sheet S placed on the feed tray 110.

[0043] Next, the movement of the second guide member 111b when the upper unit 103 is opened or closed will be described with reference to Fig. 11 to Fig. 13. Fig. 11 is a side view of the vicinity of the feed roller 11 with the upper unit 103 closed. Fig. 12 is a side view of the vicinity of the feed roller 11 with the upper unit 103 open. Fig. 13 is a side view of the vicinity of the feed roller when the upper unit 103 starts to abut against the second guide member 111b in the middle of closing the upper unit 103.

[0044] 11, when the upper unit 103 is closed, the contact portion 111g of the second guide member 111b contacts the locking portion 103a of the upper unit 103. At this time, the second guide member 111b tries to move upstream in the conveying direction D1 due to the urging force of the compression spring 113, but the contact portion 111g of the second guide member 111b is locked by the locking portion 103a of the upper unit 103, and the second guide member 111b does not move upstream in the conveying direction D1 of the sheet S.

[0045] When the upper unit 103 is opened from the state shown in FIG. 11, as shown in FIG. 12, the abutting portion 111g of the second guide member 111b is no longer locked by the locking portion 103a of the upper unit 103. Then, the second guide member 111b is retracted from the position shown by the dotted line in the figure to the retracted position shown by the solid line in the figure by the urging force of the compression spring 113. Since the position shown by the solid line is outside the range of the movement locus β of the cover member 106, the cover member 106 can be opened without interfering with the second guide member 111b. Note that, at the retracted position shown by the solid line, the second guide member 111b abuts against the first guide member 111a and does not move upstream in the conveying direction D1 of the sheet S from the position shown by the solid line.

[0046] When the upper unit 103 is closed after closing the cover member 106 from the state shown in Fig. 12, the locking portion 103a of the upper unit 103 comes into contact with the contact portion 111g of the second guide member 111b, as shown in Fig. 13. When the upper unit 103 is further closed from this state, the locking portion 103a of the upper unit 103 pushes the contact portion 111g of the second guide member 111b downstream in the conveying direction D1, and the second guide member 111b returns to the regulated position shown in Fig. 11. In the regulated position shown in Fig. 11, as described above, the contact portion 111g of the second guide member 111b is locked by the locking portion 103a of the upper unit 103, so that the second guide member 111b does not move upstream in the conveying direction D1 of the sheet S.

[0047] As described above, the second guide member 111b automatically moves to a regulating position approaching the cover member 106 or to a retracted position retracted from the cover member 106 in conjunction with the opening and closing operation of the upper unit 103. When the cover member 106 is opened, the second guide member 111b has already moved to a position where it does not overlap with the cover member 106, so that the hand does not interfere with the movement of the second guide member 111b. Therefore, according to the configuration of this embodiment, the regulating guide 111 is configured to approach the feed roller 11, and the feed roller 11 can be easily attached and detached.

[0048] Furthermore, even if the cutout portion 106b of the cover member 106 is provided within the movement range of the regulating guide 111 on the feed tray 110 in the width direction D2 of the sheets S, when the cover member 106 is opened, the second guide member 111b finishes moving to a position where it does not overlap with the cover member 106 and does not block the cutout portion 106b of the cover member 106. Therefore, the feed roller 11 can be easily attached and detached while moving the regulating guide 111 closer to the feed roller 11.

[0049] In the above, the compression spring 113 is used as a means for biasing the second guide member 111b toward the upstream side in the conveying direction D1, but a biasing means such as a tension spring or a torsion spring may also be used.

[0050] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. The sheet transport device of the present invention can be applied not only to the above-described image reading device, but also to image forming devices such as copiers, printers, and multifunction devices that have an image forming unit that forms an image on a sheet S. [Explanation of symbols]

[0051] 10 First conveyor section 11 Feed roller 12 Separation roller 70 Image reading unit 100 Image reader 103 Upper Unit 103a Locking part 104 Lower Unit 106 Cover member 106a axis 106b Cutout 110 Feeding Tray 111 Regulatory Guide 111a first guide member 111b second guide member 111c, 111d Groove 111e, 111f feet 111g Contact part 113 Compression Spring

Claims

1. It consists of an upper unit and a lower unit. A loading section for loading sheets; a feeding mechanism including a roller on the upper unit side and a roller on the lower unit side, the roller feeding the sheet stacked on the stacking section to a conveying path; a cover member that is rotatable between a closed position that covers the periphery of the rollers on the lower unit side of the feeding mechanism and forms a conveying surface for the sheet and an open position that allows the rollers on the lower unit side to be detached; a regulating portion that regulates a width direction of the sheets loaded on the loading portion, the upper unit is rotatably attached to face the lower unit so as to be displaceable between an open state and a closed state, The regulating portion is provided with a biasing member that biases the regulating portion upstream in the conveying direction of the sheet, and when the upper unit is in the unfolded state, the regulating portion is in a retracted position that is retracted from the movement trajectory of the cover member from the closed position to the open position due to the biasing force of the biasing member, and when the upper unit is in the closed state, the upper unit abuts against the regulating portion, causing at least a portion of the regulating portion to overlap with the movement trajectory of the cover member.

2. 2. The sheet transport device according to claim 1, wherein the upper unit includes a locking portion, and when the upper unit is in the closed state, the locking portion locks the regulating portion in the regulating position.

3. the restricting portion is composed of a first restricting member and a second restricting member provided on the first restricting member, The sheet conveying device according to claim 1, characterized in that the second regulating member moves to the regulating position where at least a portion of the second regulating member overlaps with the movement trajectory of the cover member, and to the retracted position where the second regulating member retracts from the movement trajectory of the cover member, which is upstream of the conveying direction of the sheet.

4. 4. The sheet conveying device according to claim 3, characterized in that when the upper unit displaces from the closed state to the unfolded state, the second regulating member moves from the regulating position to the retracted position by the biasing force of the biasing member, and when the upper unit displaces from the unfolded state to the closed state, the second regulating member moves from the retracted position to the regulating position by abutting against the upper unit.

5. 5. The sheet conveying device according to claim 3, wherein the upper unit includes a locking portion, and when the upper unit is in the closed state, the locking portion locks the second regulating member at the regulating position.

Images