JP2000247482A - Paper conveyance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a possibility that paper causes conveyance jam by transmitting the rotation of a drive roller sufficiently, even if it is difficult to move a movable guide member accurately due to unevenness of parts. SOLUTION: A plate-like fixed guide member 60 and a movable guide member 61 are provided opposingly, and a paper conveyance path F is formed therebetween. A plurality of drive rollers 50 are provided by supporting them at fixed positions along the paper conveyance path on a fixed guide member side, and a plurality of driven rollers 51 which support by it through an elastic member and press against the drive rollers 50 by elastic force of the elastic member, respectively, are provided on a movable guide member side. The movable guide member 61 regulates the travel of the driven rollers 51 against the elastic member so as to form a stopper by cutting and raising a part and hold a condition in which it protrudes from a paper guide face at all times. Moreover, it is mounted on a connection member 70 through a plurality of arm members 66a, 66b to press the driven rollers against the drive rollers by energizing the connection member by an energizing member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a facsimile, a printer, and a multifunction peripheral thereof.
In a sheet post-processing device such as a sorter, a finisher, and a mailbox, which is installed adjacent thereto, the present invention relates to a sheet conveying device that conveys a sheet by rotation of a driving roller sandwiched between a driving roller and a driven roller while being guided by a guide member. .

[0002]

2. Description of the Related Art Conventionally, this type of paper transporting apparatus includes:
For example, as shown in FIG. 17, a plate-shaped fixed guide member 101 and a movable guide member 102 are provided so as to face each other to form a paper transport path 103 therebetween, and fixed along the paper transport path 103. A plurality of driving rollers 104 are provided on the guide member 101 side at a fixed position and supported at a fixed position in the upper and lower portions in the figure.
In some cases, a plurality of driven rollers 105 are pressed against the roller.

When a sheet is fed between the fixed guide member 101 and the movable guide member 102, a drive source (not shown) is driven in accordance with the bundle thickness of the sheet to move the movable guide member 102 in the direction indicated by the arrow in FIG. Moving the fixed guide member 101
And the driving roller 104 and the driven roller 1
The paper is guided between the driving roller 104 and the driven roller 105 by being guided by the fixed guide member 101 and the movable guide member 102, and is conveyed through the paper conveyance path 103 by the rotation of the driving roller 104. I was

[0004]

However, in such a conventional paper transport device, the dispersion of parts causes
It is difficult to accurately move the movable guide member 102 in parallel. For example, a sheet can be reliably sandwiched between a part of the driving roller 104 and the driven roller 105, but the sheet can be sandwiched between the remaining driving roller 104 and the driven roller 105. Since the pinch cannot be reliably held, the rotation of the drive roller 104 cannot be sufficiently transmitted, and there has been a problem that a paper jam may occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem in a paper transport apparatus that changes a gap in a paper transport path by moving a movable guide member according to a bundle thickness of transport paper. Even if it is difficult to accurately move the movable guide member due to a variation in parts, the rotation of the driving roller can be sufficiently transmitted to eliminate the possibility that a paper jam occurs.

[0006]

According to the present invention, a driven roller is supported by a guide member and the driven roller is pressed against a driving roller supported at a fixed position by the elastic force of an elastic member. In a paper transporting apparatus for transporting a sheet by rotation of a driving roller while being sandwiched between a driving roller and a driven roller while being guided by a paper guiding surface of a guiding member, a state in which the guiding member always projects from a paper guiding surface of the guiding member is maintained. A stopper is provided to regulate the movement of the driven roller against the elastic member, while the guide member is movably urged by an urging member, and the driven member is pressed against the driving roller by the urging member. The biasing force of the biasing member is made larger than the elastic force of the elastic member.

According to the first aspect of the present invention,
When feeding paper, push the paper to move the guide member against the biasing member according to the thickness of the paper, widen the paper transport path, and follow the paper with the drive roller while guiding it with the paper guide surface of the guide member. Guided between the rollers, pushed by the paper and moved the driven roller against the elastic member according to the thickness of the sheet bundle, widened the gap with the driving roller, and sandwiched between the driving roller and the driven roller to rotate the driven roller. Conveys paper.

According to a second aspect of the present invention, in the paper transport apparatus of the first aspect, the elastic member is made of a leaf spring.
The driven roller is supported by a guide member via the elastic member of the leaf spring, and the driven roller is pressed against the driving roller by the elastic force of the elastic member.

According to a third aspect of the present invention, in the paper transport apparatus according to the first or second aspect, a stopper is formed by cutting and raising a part of the guide member.

[0010] The invention according to claim 4 is the invention according to claims 1, 2,
In the paper transport apparatus described in Item 3, the ends of the plurality of arm members that rotate about the support shaft are attached to the guide member, and the other ends of the arm members are attached to one connecting member, and the connecting member is moved. And thereby moving the guide member.

According to a fifth aspect of the present invention, in the paper transport apparatus according to the fourth aspect, the connecting member is urged by the urging member, the guide member is moved, and the driven roller is pressed against the driving roller. , Characterized in that.

In the invention according to claim 5,
When the paper is jammed, the connecting member is moved against the urging member, the arm member is rotated to move the guide member, the paper transport path is widened, and the pressing of the driven roller against the driving roller is released. .

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall schematic configuration of a sheet post-processing apparatus provided with a sheet conveying apparatus according to the present invention.

In FIG. 1, reference numeral 1 denotes an image forming apparatus such as a copying machine, a facsimile, a printer, or a multifunction peripheral thereof. The sheet post-processing device 2 is installed adjacent to the side of the image forming apparatus.

The paper post-processing apparatus 2 mainly includes a punch unit 3 for performing a punching process, a proof tray 4 for stacking fax paper and interrupt paper, and a paper for temporarily recording an image-recorded paper discharged from the image forming apparatus 1. Paper aligning tray 5 that is to be stacked in a stack, and stapler 6 that is a post-processing unit
For example, a large-volume discharge tray 7 for stacking copy sheets, and a multi-stage discharge tray 8 such as a mailbox for sorting and stacking sheets.

An image-recorded sheet discharged from the image forming apparatus 1 is conveyed horizontally by an inlet roller 10 and sent to a punch unit 3. This punch unit 3
Is a rotary punch synchronized with the conveyance of the sheet, which can be punched or not perforated by selecting it with an operation panel (not shown) provided in the image forming apparatus 1. Do not stop.

The sheet that has passed through the punch unit 3 is conveyed by conveying rollers, and reaches a branch path where the branch claws 11 are located. The branch claw 11 is operated by a solenoid (not shown) according to the mode condition of the sheet processing, and switches the sheet conveyance path between two directions of A and B.

The paper transport path B is provided, for example, in the printer mode, where the paper is not stapled,
It is used when the paper is immediately guided to the distribution paper transport path F to be described later without passing through the above, and is distributed to the multi-level paper discharge tray 8 and discharged. The sheet transport path A is used when discharging sheets to the proof tray 4, when discharging the sheets to the large-volume discharge tray 7, and when performing staple processing on the sheets.

The paper that has advanced to the paper transport path A is
The paper feed path C toward the proof tray 4 and the paper transport path D toward the sheet alignment tray 5 and the large-volume discharge tray 7 are switched by the branch claws 12 in two directions.

The sheet passing through the sheet transport path C
3 stacks on the proof tray 4. The paper passing through the paper transport path D is transported differently in the staple mode and in the non-staple mode.

In the non-staple mode, as shown in FIG. 2, the guide plate 14 is on standby with the guide plate 14 being lowered about the fulcrum position 14a. The sheet is discharged to the large-volume sheet discharge tray 7 by the driving roller 15 and the driven roller 16.

In the staple mode, the guide plate 14
Are on standby around the fulcrum position 14a (the position indicated by the dashed line in FIG. 1), and the paper passes under the guide plate 14 and is temporarily stacked on the paper alignment tray 5.

In order to reduce the length of the sheet alignment tray 5, an extendable tray 17 is provided as shown in FIG. The telescopic tray 17 is provided at the center of the sheet alignment tray 5 in the depth direction. This is to prevent interference with the jogger mechanism for aligning the paper in the width direction.

The extendable tray 17 is provided with a sensor 31 shown in FIG.
Completes the elongating operation in a predetermined time after detecting the leading edge of the sheet, and waits for the sheets to be stacked. At this time, the telescopic tray 1
The extension length of 7 is adjusted according to the length of the conveyed paper. For example, if A4 vertical size is passed,
The distal end position of the extendable tray 17 extends to an A4 vertical distal end position. If the A3 vertical size is passed, the telescopic tray 1
The tip position of 7 extends to the A3 vertical tip position to be stacked.

The extendable tray 17 is configured to extend in two stages to reduce the length. As shown in FIG. 4, the guide rod 18 of the spring 20 is extended from the paper alignment tray 5, and a guide 19 a of the spring 20 is provided inside the first-stage telescopic tray 19. FIG.
A spring 20 is set on the guide rod 18, and a first-stage telescopic tray 19 is set on the sheet alignment tray 5. As a result, the spring 20 moves the guide rod 18
And the back wall of the guide guide 19a, the first expansion / contraction tray 19 is always applied with a force that jumps out of the paper alignment tray 5, and the first expansion / contraction tray 19 is moved by the force. Can be extended from

As shown in FIG. 6, the second-stage telescopic tray 21 is also constructed in the same manner as the first-stage telescopic tray 19, and a force that always pops out of the first-stage telescopic tray 19 is applied.
With this force, the second-stage telescopic tray 21 can be extended from the first-stage telescopic tray 19.

On the other hand, as shown in FIG. 3, a string-like member 22 is locked to the base of the second-stage telescopic tray 21, and the angle is changed via a pulley 23 which is supported by the sheet aligning tray 5. It is wound on a take-up pulley 24. A wheel gear 25 is provided coaxially with the take-up pulley 24, and a worm gear 26 of a drive motor 27 is meshed with the wheel gear 25. Further, a detection filler 28 is provided on the second-stage telescopic tray 21, and a sensor 29 for detecting the same is provided on the paper alignment tray 5.

As shown in FIG. 6, rollers 30 are provided on both the first and second extendable trays 19 and 21 to smoothen the extendable operation. Thereby, the expansion / contraction tray 19.2
Drive motor 27 from the retracted state (home position)
Is rotated forward, the take-up pulley 24
2 is extended, and the expansion and contraction trays 19 and 21 are extended. At this time, the telescopic trays 19 and 21 are stopped at predetermined positions by pulse control of the drive motor 27.

When the telescopic trays 19 and 21 are contracted, the drive motor 27 is rotated in the reverse direction to wind up the cord-like member 22. Then, the sensor 29 stops at a predetermined position by detecting the detection filler 28.

As shown in FIG. 1, the paper temporarily stacked on the paper alignment tray 5 is fed to a rear end fence 35 by a brush roller 33 arranged coaxially with a discharge roller 32 and a beating roller 34. , The transport direction is aligned, the jogger fence 36 performs a horizontal alignment operation, and the stapler 6 staples. In that case, the stapler 6 can be slid by the driving unit 6A and stapled to the designated position.

In the case of the copy mode, the extendable tray 17 is then stored in the sheet aligning tray 5 by the above-described mechanism. Thereafter, the guide plate 14 is lowered and the guide plate 1
The driven roller 16 attached to the sheet 4 pressurizes the sheet, and the sheet is conveyed to the large-volume discharge tray 7 by the rotation of the driving roller 15.

A predetermined number of sheets are successively discharged to the large-volume discharge tray 7, and as shown in FIG. 7, the upper surface thereof is detected by the sensor 40, so that the stacked sheets are always kept at a fixed position. It is loaded so that it becomes. When the transfer paper is full on the large-volume paper discharge tray 7, it is detected by the lower limit sensor 41.

As shown in FIG. 7, the large-volume discharge tray 7
It is hung on a vertical lift belt 42. The upper and lower lift belts 42 are driven by an elevating motor 43 via a gear train and a timing belt, and are moved up and down by forward or reverse rotation of the elevating motor 43. If necessary, the large-volume paper discharge tray 7 performs a shift operation in a direction orthogonal to the paper discharge direction to sort the paper.

In the printer mode, when the stapled paper is discharged to the paper discharge tray 8, as shown in FIG. 1, the rear end fence 35 and the stapler 6 are moved closer to the paper closer to the front or the rear. Retreat outside the side edge. At that time, the rear end fence 35 moves by engaging with a part of the stapler 6 and following the sliding operation.

Next, the chuck arm pair 37, which has been waiting at the downward position indicated by the chain line in the drawing, is rotated to the position indicated by the solid line by the cam 38, and the leading end sandwiches the paper and rotates clockwise around the fulcrum 37a. The sheet rotates and is conveyed downward to guide the sheet from the rear end side to the sheet conveyance path F for distribution. When the pair of chuck arms 37 returns to the position indicated by the alternate long and short dash line, the pair of chuck arms 37 is opened by the operation of the cam 38, and the rotation operation is accelerated while releasing the sheet to take over the sheet to the sheet transport path F.

The paper transport path F is provided in the paper transport device 80 according to the present invention, and a fixed guide member 60 and a movable guide member 61, both having a plate shape, are formed opposite to each other. As shown in FIG. 1, a U-turn portion 56 is formed so as to be provided vertically and to extend further and return upward after passing a position corresponding to the lowermost discharge tray of the multi-stage discharge tray 8. Do it. Then, the passing paper is switched by the branching claws 52 to switch the transport direction, and is distributed and discharged onto the multi-stage discharge tray 8.

A plurality of driving rollers 50 are provided in the paper transporting device 80 along the paper transporting path F on the side of the fixed guide member 60 at a fixed position while being supported at a fixed position. The guide member 61 presses the drive rollers 50 to support a plurality of driven rollers 51. The driving roller 50 and the driven roller 51 project inward from the inner surfaces (paper guide surfaces) of the fixed guide member 60 and the movable guide member 61 by 1 to 2 mm, respectively.
One interval is usually about 2 to 4 mm.

As shown in FIGS. 8 and 9, the movable guide member 61 is divided in the width direction to provide a plurality (three in the illustrated example), and the U-turn portion 56 is formed separately. Become. As shown in FIG. 10, an elastic member 6 made of a leaf spring is provided on the outer surface of the movable guide member 61 at the vertical portion.
The driven rollers 51 are supported by the movable guide members 61 through the elastic members 63 so as to be rotatable about the support shafts 64. Each driven roller 51 is provided with a hole 61 a of the movable guide member 61 by the elastic force of the elastic member 63.
And is pressed against the driving roller 50.

The movable guide member 61 has a hole 61a.
The stopper 61b is formed by cutting and raising a part from the lower edge. Then, the movable guide member 6 is moved by the stopper 61b.
The movement of the driven roller 51 against the elastic member 63 is regulated so as to always maintain the state of protruding from the first paper guide surface.

As shown in FIGS. 8 and 9, one end of each of upper and lower arm members 66a and 66b is rotatably attached to the movable guide member 61 of the vertical portion configured as described above. Each of the arm members 66a and 66b is rotatably supported about a support shaft 67, and the other end is rotatably attached to one lever-shaped connecting member 70.

One end of the urging member 71 is hung on the lower end of the connecting member 70. The other end of the urging member 71 is hung on a pin 72 set on a side plate (not shown) in the sheet post-processing device 2. The movable member 61 is moved by urging the connecting member 70 downward in the figure by the urging member 71, and the driven roller 51 is pressed against the driving roller 50 by the urging force of the urging member 71. The urging force of the urging member 71 is the same as that of the elastic member 6 described above.
3 is greater than the elastic force.

With the above-described configuration, in the paper transport apparatus 80 according to the present invention, when a sheet having a smaller bundle thickness (less than 2 to 4 mm) is fed into the paper transport path F, the movable guide member 61 is displaced. Instead, only the elastic member 63 is bent, and the sheet is conveyed as it is by the rotation of the driving roller 50 sandwiched between the driving roller 50 and the driven roller 51.

However, when a sheet having a larger bundle thickness (2 to 4 mm or more) is fed into the sheet transport path F, the movable guide member is pressed against the urging force of the urging member 71 according to the bundle thickness of the sheet. The space between the fixed guide member 60 and the fixed guide member 60 is widened by moving 61. The fixed guide member 60 and the movable guide member 6
1 guides the sheet between the driving roller 50 and the driven roller 51, and also moves the driven roller 51 against the elastic force of the elastic member 63 in accordance with the thickness of the sheet bundle, thereby expanding the space between the driven roller 50 and the driven roller 50. ,
The paper is transported through the paper transport path F by the rotation of the drive roller 50 sandwiched between the drive roller 50 and the driven roller 51.

When the driven roller 51 is moved against the elastic force of the elastic member 63, the elastic member 63
1b, when further movement of the driven roller 51 is regulated, the movable guide member 61 is moved against the urging force of the urging member 71, and the space between the driving roller 50 and the driven roller 51 is expanded. .

When a paper jam occurs, the urging member 7
In response to the urging force of 1, the connecting member 70 is pushed up, the arm members 66 a and 66 b are rotated, the movable guide member 61 is moved in parallel, and the space between the movable guide member 61 and the fixed guide member 60 is expanded.
The pressing of the driven roller 51 against the driving roller 50 is released.

According to the illustrated sheet conveying device 80, even if the movable guide member 61 is slightly inclined due to a variation in components, the error is absorbed by the urging member 71 and the elastic member 63, and all the driving rollers 50 The rotation of the driving roller 50 can be sufficiently transmitted by reliably sandwiching the sheet by the driven roller 51, and the occurrence of a paper conveyance jam can be prevented.

Further, the stopper 61b is provided to restrict the movement of the driven roller 51 against the elastic member 63 so as to keep the movable guide member 61 always protruding from the paper guide surface. Can be prevented from being hurt by the edge of the hole 61a.

The sheet that has advanced to the sheet conveying path F is conveyed downward as shown in FIG. 11 by a driving roller 50 and a driven roller 51, and a paper discharge tray where the rear end of the sheet is discharged as shown in FIG. At a point slightly below the position of the branching claw 52 of No. 8, the conveyance of the sheet is stopped. At this time, if the paper is a large-sized paper or the discharge tray 8 to be discharged is at the lower side, the paper is once sent to the U-turn unit 56.

When the sheet stops, the sheet is conveyed in the reverse direction (switchback) by pushing the sheet out by the locking member 53 as shown in FIG.

Then, the branching claws 52 of the paper discharge tray 8 for discharging the paper are switched, and the locking member 53 stops before the branching claws 52, and is conveyed by the driving roller 58 and the driven roller 59 thereafter, and the paper is conveyed. The paper is discharged to the paper discharge tray 8.

As shown in FIG. 14, the paper heading toward the paper transport path B is discharged from the leading edge side of the paper by switching the branching claws 52 of the paper discharge tray 8 which is discharged into the paper transport path F. You. In this case, the switchback operation is not performed unlike the case of the above-described stapled sheet.

Since the branch claw 52 must deflect the sheet conveyed from the upper and lower directions to the sheet discharge tray 8, the branch claw 52 shown in FIG.
As shown in FIG. 5, the structure is divided into two, one for use from the top and one for use from the bottom. The two are meshed with each other by the gear portion 52a, and if one of them is deflected, the other can be deflected as shown in FIG. In the state of FIG. 15, the tips of the two claws intersect, but the two claws are comb-shaped to avoid interference.

When the paper is discharged to the paper discharge tray 8, FIG.
The presence or absence of a mail is notified to the user, for example, on a personal computer by a paper presence / absence detection sensor 54 shown in FIG. This is notified to the forming apparatus 1.

[0054]

Therefore, according to the first aspect of the present invention, the stopper for restricting the movement of the driven roller against the elastic member so that the guide member always keeps protruding from the paper guide surface is maintained. On the other hand, since the guide member is movable and urged by the urging member, the driven member also presses the driven roller against the driving roller, and the urging force of the urging member is made larger than the elastic force of the elastic member. In a paper transport device that changes the gap in the paper transport path by moving the movable guide member according to the bundle thickness of the transport paper, even if the movable guide member is slightly inclined due to variations in parts, the error is biased. The rotation is absorbed by the member and the elastic member, and the rotation of the driving rollers is sufficiently transmitted by securely sandwiching the sheet between all the driving rollers and the driven rollers, so that the occurrence of paper conveyance jam can be prevented.

According to the second aspect of the present invention, the elastic member is made of a leaf spring, and the driven roller is supported by the guide member via the elastic member of the leaf spring, and the driven roller is elastically powered by the elastic member. Since the driven roller is pressed, the guide member can elastically support the driven roller with a simple configuration.

According to the third aspect of the present invention, since the stopper is formed by cutting and raising a part of the guide member, the stopper can be provided on the guide member without trouble.

According to the fourth aspect of the present invention, one ends of a plurality of arm members rotating about a support shaft are attached to the guide member, and the other ends of the arm members are attached to one connecting member. Since the guide member is moved by moving the connecting member, the guide member can be translated more accurately.

According to the fifth aspect of the present invention, since the connecting member is urged by the urging member and the guide member is moved to press the driven roller against the driving roller, the driven roller is pressed against the driving roller. It can be more uniform.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a sheet post-processing apparatus including a sheet conveying apparatus according to the present invention.

FIG. 2 is a perspective view showing the vicinity of an alignment tray together with a guide plate.

FIG. 3 is a perspective view showing the paper alignment tray together with a telescopic tray.

FIG. 4 is an exploded perspective view of the first-stage telescopic tray.

FIG. 5 is a perspective view after the assembly.

FIG. 6 is a perspective view of the entire telescopic tray.

FIG. 7 is a perspective view showing a partial schematic configuration of the sheet post-processing apparatus.

FIG. 8 is a perspective view illustrating a configuration of a driven roller side of the sheet conveying device according to the present invention.

FIG. 9 is a side view thereof.

FIG. 10 is a partially enlarged view of FIG.

FIG. 11 is an explanatory diagram illustrating a state in which a sheet is guided to a sheet conveyance path.

FIG. 12 is an explanatory diagram showing a state in which the sheet has been sent to a U-turn unit.

FIG. 13 is an explanatory diagram showing a state in which the sheet is switched back and discharged onto a specified discharge tray.

FIG. 14 is an explanatory diagram illustrating a state in which a sheet discharged from the image forming apparatus is immediately guided to a sheet conveyance path without passing through a sheet alignment tray.

FIG. 15 is a mechanism diagram of a branch claw that guides a sheet to a sheet discharge tray.

FIG. 16 is a diagram illustrating a state of a branch claw when a sheet is discharged to a sheet discharge tray by switching a sheet conveying direction.

FIG. 17 is a diagram illustrating the configuration of a conventional sheet transport device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Paper post-processing apparatus 7 Large-volume paper discharge tray 8 Multi-stage paper discharge tray 50 Drive roller 51 Follower roller 52 Branch claw 53 Lock member 56 U-turn part 58 Drive roller 59 Follower roller 60 Fixed guide member 61 Movable guide Member 61a hole 61b stopper 63 elastic member 64 support shaft 66a arm member 66b arm member 67 support shaft 70 connecting member 71 urging member 72 pin 80 paper transport device F paper transport path

Continuation of the front page (72) Inventor Terumitsu Higashi 2-13-13 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture Inside Ricoh Elemex Corporation (72) Inventor Yoshihiko Nakayama 2-2-1 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture F term (reference) in Ricoh Elemex Corporation 3F049 CA33 DA12 LA13 LA14 LB03 3F101 FB12 FC07 FD04 FE02 FE06 LA13 LB03

Claims (5)

[Claims] A guide member supports a driven roller, and the driven roller is pressed against a driven roller supported at a fixed position by the elastic force of an elastic member, and the driven roller is guided by a paper guide surface of the guide member. A sheet conveying device that conveys a sheet by rotation of the driving roller sandwiched between the driven member and the driven roller. While providing a stopper for restricting the movement of the rollers, the guide member is movable and urged by an urging member. The urging member also presses the driven roller against the driving roller, and the urging force of the urging member Is larger than the elastic force of the elastic member. 2. The elastic member is made of a leaf spring, and the driven roller is supported by the guide member via the elastic member of the leaf spring, and the driven roller is pressed against the driving roller by the elastic force of the elastic member. The paper transport device according to claim 1, wherein the paper transport device is applied. 3. The sheet conveying device according to claim 1, wherein the stopper is formed by cutting and raising a part of the guide member. 4. An end of a plurality of arm members rotating around a support shaft is attached to the guide member, the other ends of the arm members are attached to one connecting member, and the connecting member is moved. By moving the guide member,
The sheet transport device according to claim 1, 2 or 3. 5. The connecting member is urged by the urging member,
The paper transport device according to claim 4, wherein the guide member is moved to press the driven roller against the driving roller.