JPH0948555A - Sheet aftertreatment device and image forming device with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet aftertreatment device which can regulate the posture of an aftertreatment means with simple structure, and an image forming device equipped with it. SOLUTION: A shifting and retaining member which retains an aftertreatment means shifts an aftertreatment means along the end on the side where a bundle of sheets are bound by making the guide groove 447 made at a base 432 always retain the first guiding support member 434 and also, making a guide rail 437 retain one hand of the second and third guiding support means 435 and 436. And, the aftertreatment is arranged so that is can shift in the posture capable of parallel binding and oblique binding inclined in specified direction to a bundle of sheets, by making the guide rail 437 retain the second guiding support means 435, at the time of this shifting. Moreover, the aftertreatment means is arranged so that it can shift in posture capable of reverse oblique binding inclined in reverse direction to the specified direction by making the guide rail 437 retain the third guiding support means 436.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet post-processing apparatus and a sheet post-processing apparatus for performing post-processing such as sheet binding of sheets image-formed by an image forming apparatus such as a copying machine or a laser beam printer. The present invention relates to a provided image forming apparatus.

[0002]

2. Description of the Related Art A conventional sheet post-processing apparatus includes a post-processing tray for stacking sheet bundles when binding sheets, and a post-processing means for performing a binding operation on the sheet bundles stacked on the post-processing tray. And the post-processing unit is moved to a predetermined binding position in accordance with the binding position of the sheet bundle during the binding operation.

Since it is necessary to arrange the sheet bundle when performing the binding operation in this manner, a regulating member is fixedly mounted on the post-processing tray, and the binding side end of the sheet bundle is brought into contact with the regulating member. I am trying to arrange the sheet bundle.

[0004]

By the way, in such a conventional sheet post-processing apparatus, when the post-processing means is moved, the restriction member fixed to the post-processing tray becomes an obstacle, so that the post-processing apparatus is temporarily stopped. After the processing means is moved to a position where it does not overlap the regulation member, it is moved to a predetermined binding position, and when parallel binding is performed, the binding operation is performed at that position.

On the other hand, in the case of performing the diagonal binding, the post-processing means is inclined in a predetermined direction until the binding position is reached. However, in the case of binding the back side of the sheet, the binding method is the case of binding the front side and the binding method. Since it is reversed, the inclination direction of the post-processing means must be changed so that the reverse oblique binding can be performed.

However, since a complicated attitude control means is required to regulate the attitude of the post-processing means in accordance with the binding method as described above, there is a problem that the apparatus becomes large and the cost becomes high. there were.

In order to solve such a problem, for example, the post-processing means may be arranged at the binding positions corresponding to the respective binding positions of the sheet bundle on the post-processing tray. In this case, however, not only the structure of the post-processing tray becomes complicated, but also the apparatus becomes large and the cost becomes high, which causes other problems.

Therefore, the present invention has been made in order to solve such a problem, and is equipped with a sheet post-processing device and a post-processing device which can regulate the posture of the post-processing means with a simple structure. Another object of the present invention is to provide an image forming apparatus.

[0009]

SUMMARY OF THE INVENTION The present invention is a post-processing tray for stacking sheet bundles when binding sheets, and a post-processing means for performing binding operation on the sheet bundles stacked on the post-processing tray. And a sheet post-processing apparatus that is configured to move the post-processing unit to a predetermined binding position in accordance with the binding position of the sheet bundle during the binding operation, and is provided to face the post-processing tray. A first part that holds a post part having a guide groove extending along an end of the sheet bundle to be bound and a guide rail arranged along the guide groove, and the post-processing means. Second
And a third guide support member, and the first guide support member is always held in the guide groove of the base portion, and the second or third guide support member is provided.
A guide holding member for moving the post-processing means along the end of the bundle of sheets to be bound while holding one of them on the guide rail, the post-processing means being provided on the guide rail. When the second guide support member is held, the second guide support member moves in a posture capable of parallel binding or oblique binding in a predetermined direction relative to the sheet bundle, and the guide rail holds the third guide support member. When it is present, it is configured so as to move in a reverse obliquely stapling posture that is inclined in a direction opposite to the predetermined direction.

According to the present invention, the second and third guide supporting members are mounted on the moving holding member with different mounting heights, while the guide rail holds only the second guide supporting member. It is characterized in that a region and a second region that holds only the third guiding support member are formed.

Further, according to the present invention, a post-processing tray for stacking a large number of sheets discharged from the image forming apparatus, and a post-processing for performing post-processing such as binding on a sheet bundle stacked on the post-processing tray. In a sheet post-processing apparatus including a means and a moving means for moving the post-processing means to a predetermined post-processing position of the sheet bundle, the sheet stacked on the post-processing tray of the post-processing means The position and the angle are configured by a first guide support member whose position is regulated by the first restraint member, and second and third guide support members whose position is regulated by the second restraint member. is there.

In the present invention, the position of the first guide support member is always regulated by the first regulating member, and the position of the second guide support member is regulated by the second regulating member in a specific region. The third guide support member is characterized in that the position of the second guide support member is restricted by the second restricting member outside the area where the position of the second guide supporting member is restricted by the second restricting member.

Further, according to the present invention, an area in a height direction in which the second restricting member restricts the position of the second guide support member, and a height direction in which the second restricting member restricts the position of the third guide support member. It is characterized in that it has a difference with the area of.

Further, the present invention can be applied to an image forming apparatus including an image forming section and a sheet post-processing apparatus for post-processing a sheet image-formed by the image forming section. It is a feature.

Further, by configuring as described above,
The movement holding member always holds the first guide support member in the guide groove formed in the base portion provided facing the post-processing tray, and holds one of the second guide support member and the third guide support member in the guide rail. By doing so, the held post-processing means can be moved along the end of the sheet bundle on the side to be bound. Further, at the time of this movement, by holding the second guide support member on the guide rail, the post-processing means can move in a posture capable of parallel binding with respect to the sheet bundle or oblique binding inclined in a predetermined direction, Parallel binding or diagonal binding can be performed at a predetermined binding position. Further, by holding the third guiding support member, it is possible to move in a posture capable of reverse diagonal binding that is tilted in the direction opposite to the predetermined direction, and it is possible to perform reverse diagonal binding at a predetermined binding position.
Further, the second and third guiding support members are mounted on the moving holding member with different mounting heights, while the guide rail holds only the first guiding region and the third guiding support member. By forming the second region, it is possible to always hold the second or third second guide support member on the guide rail.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the internal structure of a copying machine which is an example of an image forming apparatus to which the present invention can be applied. In the figure, 1 is a sheet post-processing device according to the present invention, 10
Reference numeral 0 is a main body of the copying apparatus, 200 is a cassette for loading a plurality of sheets of different sizes, and 300 is a circulation type document feeder (hereinafter referred to as ADF) that automatically feeds a document.

First, in the copying apparatus main body 100, 10
Reference numeral 1 is a platen glass on which an original is placed, and 103 and 104 are operation reflection mirrors for changing the optical paths of the reflected light of the original, respectively.
(Scanning mirror), 105 is a lens having focusing and variable magnification functions, and 106 is a first scanning mirror having an illumination lamp and a mirror for reading a document sent from the ADF 300.

Reference numeral 107 denotes a resist roller, and 108 and 110.
Is a photosensitive drum and a pressure roller, 111 is a conveyor belt that conveys the recording paper on which an image is recorded to the fixing side, 112 is a fixing device that thermocompresses the conveyed recording paper, and 113 and 117.
Is a transport roller for transporting the recording paper, 114 is a flapper for switching the transport direction of the transported recording paper, 11
Reference numeral 5 denotes a conveyance roller that conveys the recording paper in the direction of the sheet post-processing device 1, 116 denotes a reversing path that reverses the front and back of the recording paper,
Denoted at 18 is a transport roller that transports the paper from the cassette 200 to the photosensitive drum unit, and denoted at 119, 120, and 121 are rollers, trays, and separation pads that transport the paper from the feeding unit. 122, 123, and 125 are lasers and polygon mirrors for forming an image on the photosensitive drum,
A mirror for changing the optical path, and 124 is a polygon mirror.
This is a motor for driving 123.

Further, in the cassette 200, 201 is a transport roller for pulling out a sheet from the cassette 200, and 202.
Is an intermediate roller for delivering the sheet pulled out from the cassette 200 upward.

By the way, the surface of the photosensitive drum 108 is composed of a photoconductor and a frameless photosensitive member using a conductor, and the drum 108 is rotatably supported and responds to the depression of the copy start key. A main motor (not shown) which is operated starts rotation in the direction of the arrow in the figure. When the predetermined rotation control of the drum 108 and the potential control processing (preprocessing) are completed, the original placed on the original table glass 101 is illuminated by an illumination lamp integrated with the first scanning mirror 106, and The reflected light of the original passes through the scanning mirrors 103 and 104, passes through the lens 105, and forms an image on the light receiving element inside the lens unit.

Here, the reflected light image from the original is converted into an electric signal by the light receiving element and sent to an image processing section (not shown), while a predetermined data received by the main body from the user in this image processing section. -After the data processing is performed,
To the user 112. The electrical signal subjected to the data processing is converted into light by the laser unit 112, and then the polygon mirror-123 and the mirror mirror-125.
Is reflected by the toner to form an electrostatic latent image on the photosensitive drum 108, visualized by toner, and transferred onto a transfer paper as described later.

Further, the transfer paper set in the cassette 200 or the hand tray 120 is fed by the paper feed roller 118,
119, 201, and 202 feed the inside of the copying apparatus main body 100, and the registration roller 109 feeds it toward the photosensitive drum 108 at an accurate timing so that the leading edge of the latent image and the leading edge of the transfer sheet are aligned with each other. Then, the photosensitive drum 1
When the transfer paper passes between the roller 08 and the roller 110, the toner image on the drum 108 is transferred onto the transfer paper.

After that, the transfer paper is separated from the drum 108, guided to the fixing device 112 by the conveyor belt 111, and fixed by pressing and heating. The transfer paper (hereinafter referred to as a sheet) on which an image is formed in this manner is advanced by the flapper 114 in the direction of the discharge roller 115, and the print surface is directed upward to the sheet post-processing device 1. It is supposed to be discharged.

On the other hand, in the ADF 300, 301 is a stacking tray on which a bundle of originals 302 is set. For example, in the case of a one-sided original, a half-moon roller 304 and a separating roller 303 separate the sheets from the bottom of the originals, Transport roller 30
5 and the entire surface belt 306 conveys the document glass 101 to the exposure position on the platen glass 101 via paths I to II and then stops to prepare for the copying operation.

After the copying is completed, the original is sent to the path VI by the large conveyance roller 307 via the path IV, and is returned to the upper surface of the original bundle 302 again by the paper discharge roller 308.
Reference numeral 309 denotes a recycle lever for detecting the circulation of the original document, which is placed on the upper part of the original document bundle at the start of feeding the original document.
When the originals are sequentially fed and the trailing edge of the final original falls through the recycling lever 309, the originals fall by their own weight to detect the circulation of the originals.

On the other hand, in the case of a double-sided original, the original is temporarily passed through the path I,
A switching flapper 31 that is guided from II to III and is rotatable there.
By switching 0, the leading edge of the document is guided to path IV and the transport roll
After passing through the path II by the la 305 and the entire surface belt 306 on the platen glass 101, it is stopped. That is, the document is inverted by the large conveyance roller 307 in the route of paths III to IV to II.

By the way, a stopper member 2 is provided above the sheet post-processing apparatus 1, and when the sheet post-processing apparatus 1 is connected to the copying apparatus main body 100, the stopper member 2 is used. It is adapted to be positioned and attached by being locked to the hold portion 133 formed on the side surface of the. Further, at the lower part of the sheet post-processing apparatus 1, an origami unit or a mounting base 70 for supporting the main body 1 is configured, and the casters 8 are movably mounted on the mounting base 70.
0 is attached.

Therefore, when performing jam processing near the paper discharge section of the copying apparatus main body 100 or jam processing at the transfer section of the sheet post-processing apparatus 1 and the copying apparatus main body 100,
First, the stopper member 2 is rotated in the X direction shown in FIG. 2 to release the engagement with the hold portion 133, and then the sheet post-processing apparatus 1 is moved horizontally to be separated from the copying apparatus main body 100. It is easy to do.

On the other hand, when the sheet ejected from the ejecting section of the copying apparatus main body 100 is processed in the sheet post-processing apparatus 1, the upstream end of the flapper 3 is located downward in FIG. The upstream end of 4 is located above,
It is sent to the first transport path 6 through the roller pair 5. When the sheet is conveyed to the folding device, the upstream end of the flapper 3 is located upward and is fed through the third conveying path 7 in the direction indicated by the broken line in the figure. Only the case of processing a sheet in the processing apparatus 1 will be described.

The sheet ejected from the ejecting section of the copying apparatus main body 100 has the upstream end portion of the flapper 3 positioned downward, and is fed further downstream from the first conveying path 6 through the roller pair 5. In the figure, 8 is a second transport path (buffer path), 9 is a buffer roller, 14, 15, 1
Reference numeral 6 is a buffer roller, and 10, 11, 12, and 13 are sheet detection sensors, which detect a passing sheet, a staying sheet, and the like. Reference numeral 17 is a first discharge roller, 18 is a pressing roller, and 19 is a discharge alignment belt.
And is rotated by being clamped between the press rollers 18, and as a measure for preventing the belt from coming off, an endless rib (not shown) is provided in the vicinity of the center of the inside of the belt, and engages with the first discharge roller 17 to rotate. .

Further, reference numeral 21 is a width aligning plate for aligning sheets together with a trailing edge regulating member 20 which is a regulating member described later at the time of stapling (binding operation).
Further, reference numerals 23, 24 and 25 are first, second and third trays 26 for stacking sheets discharged from the discharge port 50.
Is a tray unit that moves up and down while holding the first, second and third trays 23, 24 and 25, and can be moved up and down by a drive source built in the lower part of the tray unit 26. ing.

On the other hand, a staple unit 400A is provided with an electric stapler 400 which is a post-processing means for performing a binding operation on a sheet bundle stacked on a staple tray 38 which is a post-processing tray at the time of stapling. As shown in FIG. 3, the pulse motor moves in the direction of the arrow Y to obliquely bind the sheets stacked on the staple tray 38 at one front side (binding position H).
₁ ) Parallel binding at ₂ locations (binding positions H ₂ , H
₃ ), reverse diagonal binding at the back 1 position (binding position H
₄ ) is supposed to do. In the figure,
The size of the binding sheets is A3, A4 and B4, B5
However, the gist of the present invention is not limited to a specific paper size.

Here, as shown in FIG. 4, the electric stapler 400 is fixed to the stapler cover 430 and is fixed to the moving base 433 which is a moving holding member.
It is held by 31 so as to be movable in the X direction. A spring member 439 is fixedly mounted on the movable table 433, and the stapler cover 43 is fixed by the spring member 439.
0 is biased upward and is positioned by the stopper 430a.

The moving table 433 has a first, second, and
The third support shafts 441, 442 and 443 are fixedly installed, and the first support shaft 441 has a pulley gear 440 and a first guide support member 43.
4 and the second guide support member 435 on the second support shaft 442,
Third guide support members 436 are rotatably supported on the third support shafts 443, respectively. Furthermore, this moving table 433
Includes a roller 44 for maintaining the parallel movement of the moving base 433.
4 is rotatably supported, and a stopper regulating member 438 which constitutes a retracting means for a rear end regulating member 20 described later.
Is fixed.

On the other hand, as shown in FIG. 5, the stay 432, which is a base portion provided to face the staple tray 38, has a first end along the rear end of the sheet bundle, which is the end on the side where the sheet bundle is bound. A guide groove 447 that is a restricting member is formed so as to extend, and a guide rail 437 that is a second restricting member is arranged along the guide groove 447.
A rack gear 445 that meshes with the gear 40 is fixed.

Here, the guide groove 447 is for holding and regulating the position of the first guide support member 434, and the guide rail 437 has one of the second guide support member 435 and the third guide support member 436. It is for holding and controlling the position. Then, in this way, the first guide support member 434 is provided in the guide groove 447, and the second guide support member 4 is provided.
By holding one of the third guide support member 436 or the third guide support member 436 on the guide rail 437, the electric stapler 400 held on the moving table 433 moves on the stay 432 to a predetermined binding position along the rear end of the sheet bundle. You can do it.

By the way, this stapler unit 400
When A moves, the first guide support member 434 is always held in the guide groove 447 and is indicated by A to A in FIG.
While moving between G, the second guiding support member 435 is held and moved by the guide rail 437 only while the first guiding support member 434 moves between A and E, and the third guiding support member 43.
6 is held and moved by the guide rail 437 only while the first guide support member 434 moves between E and G.

When the second guide support member 435 is held by the guide rail 437, the stapler unit 400A is parallel or in a predetermined direction with respect to the sheet bundle so as to perform parallel binding or diagonal binding at a predetermined binding position. It is designed to move in an inclined posture. Further, when the third guide support member 436 is held by the guide rail 437, the stapler unit 400A moves in a posture inclined in a direction opposite to the predetermined direction so as to perform the reverse diagonal binding at the predetermined binding position. Has become.

Here, the posture of the stapler unit 400A is always regulated by the first guide support member 434 and the second or third guide support members 435 and 436 in such a manner as described above. Since the posture can be regulated without using a complicated posture control means, it is possible to avoid an increase in size and cost of the device. Further, by moving the stapler unit 400A along the guide rail 437 and the guide groove 447, the load when the stapler unit 400A is moved can be reduced, and the pulse motor described later can be miniaturized. .

By the way, the mounting height of the second guiding support member 435 is lower than the mounting height of the third guiding support member 436 (see FIG. 4). In addition, the guide rail 437 is
As shown in FIG. 5, it has a first region 437a that regulates the second guide support member 435 and a second region 437b that regulates the third guide support member 436, and as shown in FIG. The height of both side walls 437c of the guide rail 437 with which the 435 and the third guide support member 436 contact is formed so that the second region 437b is higher than the first region 437a.

Then, in this way, the second guide support member 43 is formed.
5 is lower than the mounting height of the third guiding support member 436, and the height of both side walls 437c of the second region 437b is higher than that of the first region 437a.
And the second region 437b have a difference,
Since only the second guide support member 435 is positioned in the area 437a and only the third guide support member 436 is positioned in the second area 437b by the guide rails 437, the posture of the stapler unit 400A is restricted more reliably. be able to.

Further, in the region where the third guide support member 436 tries to enter the second region 437b, it is not necessary to provide a notch or the like in the region in the height direction of the guide rail 437 which regulates the second guide support member 435. There is no risk that the second guide support member 435 will fall out of the restricted area of the guide rail 437.

In the figure, 446 is a photo interrupter for detecting whether or not the stapler unit 400A is in the home position (when the first guide support member 434 is at the point indicated by A in the figure).

On the other hand, as shown in FIG. 6, a pulse motor 452 for moving the stapler unit 400A in the arrow Y direction is fixedly mounted on the moving table 433, and a belt pulley 454 is fixedly mounted on the pulse motor 452. ing.
Here, the belt pulley 454 is connected to the pulley gear 440 via the timing belt 455, and the rotation of the motor 452 is transmitted to the pulley gear 440 via the belt pulley 454 and the timing belt 455, whereby the stapler unit 400A is transferred. It moves in the direction of the arrow Y. 453 is a motor 452
It is a cover for electric parts.

Next, the attitude regulation for the stapler unit 400A will be described.

First, referring to FIG. 5, the first guide support member 4 is provided.
34 is in the A position, that is, the stapler unit 40
When 0A is in the home position, the second guide support member 4
35 is in the first region 437a of the guide rail 437,
The third guide support member 436 is in a free state. At this time, the third guide support member 436 is not connected to the second guide support member 4
The stapler unit 400A is located closer to the staple tray 38 than 35, and in this state, the stapler unit 400A is tilted in a predetermined direction, and is in a posture capable of oblique binding at one position on the front side at the position H ₁ in FIG.

Next, when the first guide support member 434 moves from the position A to the position C, the stapler unit 400A, which was tilted in the predetermined direction at the position A,
When the second guide support member 435 moves in the first region 437a, the second guide support member 435 gradually rotates in parallel with the width direction of the sheet, and when the first guide support member 434 moves between C and D, The attitude of the stapler unit 400A is regulated so as to maintain a parallel state with respect to the width direction of the sheet. As a result, parallel two-position binding (H
₂ , H ₃ ) operation becomes possible.

Next, when the first guide support member 434 moves from the position D to the position F, the second guide support member 435 is formed.
Comes off from the guide rail 437, and at the same time, the third guide support member 436 enters the second region 437b of the guide rail 437 from the free position. At this time, the second guide support member 435 is located closer to the staple tray 38 than the third guide support member 436, and in this state, the stapler unit 400A tilts in the direction opposite to the predetermined direction.

Then, when the first guide support member 434 moves from the F position to the G position, the stapler unit 400A tilted in the opposite direction is moved by the third guide support member 436 moving in the second region 437b. Move while leaning. As a result, the reverse diagonal binding (H ₄ ) operation can be performed at one back diagonal position according to various paper sizes.

As described above, since the stapler unit 400A is configured to be movable in the Y direction while the posture is regulated, the front side 1-position binding, the 2-position binding, and the back position at positions corresponding to various paper sizes are performed. One side binding is possible.

In this embodiment, the binding position control of the stapler unit 400A is performed by defining the rotation amount of the pulse motor 452 by the number of pulses with the home position as the base point. The gist is not limited to this.

Further, in the present embodiment, as shown in FIG. 3, by providing the sheet alignment reference on one side, the front side one binding position (H ₁ ) is made common for various paper sizes. However, even if a sheet sensor is used as the sheet alignment reference and the two binding positions (H ₂ , H ₃ ) are made common to various paper sizes, there is no deviation from the gist of the present invention.

On the other hand, when performing such a binding operation, it is necessary to provide a regulating member that abuts on the rear end of the sheets to arrange the sheet bundle. Therefore, as shown in FIG. Is provided with a rear end regulating member 20.

Here, the rear end regulating member 20 is rotatably held by a shaft member 457 fixed to the staple tray 38, while it is rotated counterclockwise by a spring member 448 wound around the shaft member 457. The regulation portion 20a, which is urged in the direction and formed at one end, is made to project upward from the rear end of the staple tray 38. Then, when the sheets are stacked on the staple tray 38 in this state, the trailing edge of the sheets comes into contact with the trailing edge regulating member 20, and the trailing edge of the sheet bundle Sa is adjusted.

By the way, since the trailing edge regulating member 20 and the electric stapler 400 have an overlapping positional relationship, when the stapler unit 400A moves,
When performing the staple binding operation, the trailing edge regulating member 20 becomes an obstacle. Therefore, when the stapler unit 400A moves to the rear end regulating member 20, the rear end regulating member 2
Retraction means 449 for retracting 0 to a position that does not hinder the movement of the stapler unit 400A is provided.

Here, the retracting means 449 is fixed to the rear end regulating member 20, the gear portion 450 attached to the shaft member 457 and the lower end portion are axially supported, and the rear end regulating member is provided. A rotatable fan-shaped gear 451 that meshes with the gear unit 450 of 20 and a fan-shaped gear 451 that is fixed to the moving base 433 and moves when the stapler unit 400A moves.
And a stopper regulating member 438 that abuts on the fan gear 451 and rotates the fan gear 451 about the shaft portion 456 as a fulcrum.

The sector gear 451 has a contact portion 45.
1a is provided, and when the stapler unit 400A moves, the stopper regulating member 438 comes into contact with the contact portion 451a. Then, when the stopper regulating member 438 contacts in this manner, the fan gear 4
51 is pushed in the direction orthogonal to the moving direction of the stapler unit 400A, and is rotated to the position of the broken line shown in FIG.

When the fan-shaped gear 45 rotates in this way, the gear portion 450 meshing with the fan-shaped gear 45 rotates, and the trailing edge regulating member 20 contracts the spring member 448 accordingly, and the staple tray tray is retracted. 38 to the retracted position that does not hinder the movement of the stapler unit 400A below 38.
It rotates downward with 57 as a fulcrum.

When the stapler unit 400A further moves, the stopper regulating member 438 causes the fan gear 45 to move.
Since it comes off from the first contact portion 451a, the trailing edge regulating member 20 together with the fan gear 451 is returned to the position for regulating the trailing edge of the sheet bundle Sa shown in FIG. 8 by the restoring force of the spring member 448. It has become.

By the way, the rear end regulating member 20 is shown in FIG.
As shown in FIG. 5, a plurality of sheets are provided in the width direction of the seat, and these rear end regulating members 20a, 20b, 20c, 20d,
The evacuation means 449 is provided in each of the 20e, so that each of the rear end regulating members 20a, 20b, 20 is provided.
The c, 20d, and 20e are configured to be independently rotatable.

In the figure, the three trailing edge regulating members 20 are arranged according to the position of the stapler unit 400A.
The a, 20b, and 20c are in positions where the rear ends of the sheet bundle are aligned, and the other two rear end regulating members 20d and 20e are in positions where they do not hinder the movement of the stapler unit 400A.

Next, the specific structure and basic operation of the electric stapler 400 will be described. The electric stapler 400 has an alligator shape as shown in FIG.
An upper forming unit 401 and a lower staple table 402 are provided. A needle cartridge 403 is detachably attached to the forming unit 401, and about 5000 needles H connected in a plate shape are loaded in the needle cartridge 403.

Here, the plate needle H loaded in the needle cartridge 403 is biased downward by a spring 404 provided on the uppermost side of the needle cartridge 403, and the feed roller arranged at the lowermost side. It is configured to give a conveying force to 405. The needles H sent out by the feed roller 405 are formed one by one by swinging the forming part 401.

Further, in the forming section 401, when the staple motor 406 is activated, the eccentric cam gear 408 is rotated via the gear train 407, so that the eccentric cam attached integrally with the eccentric cam gear 408 causes the arrow mark. As shown in FIG. 5, the clinching operation (needle binding operation) is performed by swinging to the staple table 402 side.

The electric stapler 400 is provided with a reflection type sensor 409 below the staple cartridge 403 in order to detect the stapleless state of the staple H loaded in the staple cartridge 403. In this embodiment, the reflective sensor 409 is used for the needle cartridge 4.
A staple jam (needle clogging) of the stapling staple H sent from the printer 03 is detected.

Next, the detection of the staple jam of the staple H will be described. FIG. 11 is a plan view of the electric stapler 400. The staple motor 406 is connected with a cord 406 a through which a drive current flows.
6a is equipped with a current sensor (abnormality detection means) 406b as load detection means for detecting the value of the flowing current.

On the other hand, FIG. 12 shows that the staple motor 40 in one stapling stroke detected by the current sensor 406b.
6 shows the waveform of the current value flowing in 6. In the figure, W1 is a waveform when the staple H is normally ejected and penetrates the sheet bundle S and is bent, and W2 is shot (the staple H is not ejected even when the stapler 56 is operated). It is a waveform of time. At the time of blank ejection, there is no load when the needle H penetrates the sheet bundle S and no load at the time of bending the staple, so the level of the current value becomes small.

Further, W3 is a waveform when a stapling defect, a stylus jam or the like occurs. At this time, generally overload occurs,
The level of the current value rises extremely. Therefore, when the current level is near the I ₀ value (initial setting value), it can be determined that the needle is being normally struck, and I> I ₀ + C (C is a variation).
When the staple jam, the stapling failure, Suteipurameka abnormality is considered, it can be determined that when I <I ₀ -C is ineffective. It should be noted that the staple-free state or the staple jam state that has occurred in the electric stapler 400 can be notified to the operator via a display unit using an LED or the like.

Next, the stapling operation of the electric stapler 400 constructed as above will be described.

The plate-shaped stapler H accommodated in the staple cartridge 403 is fed from the lowermost side by the feed roller 405.
After being sent out one by one, as shown in FIG. 13, the needle H1 is sent to the needle bending block 415, and the leading end of the needle H1 is held in the holding groove 415a of the needle bending block 415 at its central portion.

After that, when the eccentric cam gear 408 rotates and the forming section 401 moves to the lower operating position, the driver 4 is driven by a drive mechanism (not shown) as shown in FIG.
16 is pushed down and the plunger 416a is pushed down. At this time, the U-shaped bending block 417 is pressed by the pressing claw 416b formed in a part of the plunger 416a and is pressed onto the needle bending block 415. As a result, the stapler needle H held in the holding groove 415a of the needle bending block 415 is bent into a U shape as shown in FIG.

On the other hand, after this, the plunger 416a is further pushed down, and the pushing claw 416b is changed to the U-shaped bending block 41.
7, only the plunger 416a is pushed down to reach the taper portion of the needle bending block 415, and the most advanced needle H1 bent in a U shape while pushing the needle bending block 415 to the position shown by the one-dot chain line in FIG. Only the chisel is sheared with the staple cutting member 418, the needle H1 is driven into the sheet S, and further pressed against the staple table 402 side to bind and bind the sheet S.

After that, when the rotation of the eccentric cam gear 408 advances and the forming part 401 moves to the upper standby position, the driver 416 and the plunger 416a move upward and return to the standby position, and the stapling operation 1 The process ends.

Next, the structure of the staple cartridge 403 and the method of loading the staple H stored in the cartridge 403 will be described.

As the needle cartridge 403, a transparent case integrally formed of plastic, resin, or the like having a housing with an open bottom is used. Also, FIG.
As shown in FIG. 5, a spring 404 is attached to the upper surface of the staple cartridge 403 to bias the staple H that is loaded in the cartridge 403 downward. The stapling needle H loaded in the staple cartridge 403 is locked by a stop means such as a click not shown so as not to drop from the loading opening formed on the bottom surface of the staple cartridge 403.

The stapling needle H is designed to be loaded in the cartridge 403 in a state in which a plurality of rod-shaped needles connected to each other and formed into a plate shape are stacked, but before loading. After stacking a plurality of plate-shaped products, the packaging paper 419 holds the U-shaped products on both sides, and a tape 420 is wrapped around the plate-shaped needles to be bundled. A handle 420a is pulled out from the tape 420, and the handle 420a can be easily peeled off by pulling the handle 420a.

On the other hand, on one side surface of the staple cartridge 403, an arrow 40 serving as an index indicating the loading direction of the staple H for staples.
3a is formed by a method such as printing or forming a grain on the case, and an arrow 419a indicating the loading direction of the staple H is also formed by printing on the side surface of the wrapping paper 419 holding the staple H. ing.

Then, in this way, the needle cartridge 403
By forming arrows 403a and 419a which are indexes indicating the loading direction on one side surface of the wrapping paper 419 and the side surface of the wrapping paper 419,
The staple H is staple cartridge 4 in front and back
No. 03 can be prevented from being loaded, and stapling can be effectively performed.

By the way, when the staples H for staples are used up, as described above, the reflective type sensor 409 provided at the bottom of the staple cartridge 403 detects the stapleless state of the staples H. However, when the stapleless state is detected in this way, the stapler unit 400A is fixed to the home position as shown in FIG. 16, and the stapleless state is displayed via the display unit using an LED or the like. .

Here, when the needleless state is displayed in this manner, the operator first moves to the home position shown in FIG.
The electric stapler 400 in the state shown in FIG.
8, slide along the support member 431 in the direction of the arrow, and then rotate in the direction of the arrow at the rear end portion of the support member 431 as shown in FIG. 19, and finally mounted on the electric stapler 400. Pull out the needle cartridge 403.

Then, as shown in FIG. 15, the staple H held by the wrapping paper 419 is pressed against the spring 404 by pushing the staples H aligned with the arrows 419a and 403a into the cartridge thus extracted. To do. After that, the handle 420a is pulled and the tape 420 that bundles the needles H is peeled off. This completes the loading operation.

On the other hand, after the needle H is thus loaded, the needle cartridge 403 is first attached to the electric stapler 400, and then the electric stapler 400 is rotated in the direction opposite to the arrow direction shown in FIG. The work is completed by sliding it along the support member 431 in the direction opposite to the arrow direction shown by 18, and finally returning it to the position shown in FIG.

Next, such a stapler unit 40
The sheet post-processing operation of the sheet post-processing apparatus including 0A will be described.

For example, when ejecting a copy sheet without stapling, the first, second and third trays 23,
Directly discharge to 24 and 25. In FIG. 20, the second tray 2
4 shows the case where the copy sheet is discharged.

When the non-staple mode is selected by the user, the cam 35 shown in FIG. 21 rotates in the direction of the arrow by the drive source M, so that the swing guide 31 swings as shown in FIG. The movable shaft 31a is swung to a position where the discharge rollers 32 and 33 are pressed against each other. At this time, the stopper 3 for closing the discharge port 50
0 is stopped at the position rotated in the arrow direction with respect to the swing guide 31.

In this state, the sheet discharged from the copying apparatus main body 100 passes through the conveying path 6 shown in FIG. 2 and is passed to the roller pairs 5 and 17, and further discharged to the downstream side by the roller pairs 5 and 17. After that, it is directed toward the tray 24 by the swing guide 31, is discharged from the discharge port 50 via the discharge rollers 32 and 33, and is sequentially stacked on the tray 24.

When the sheet is discharged, if the sheet is charged due to the state of the sheet S, or if the coefficient of friction between the sheets S is high and the ejection is poor, the roller 32 and the lower skid guide 27a may be separated from each other. In some cases, the trailing edge of the sheet may get caught in the delivery section, and the sheet may not be completely discharged.

Therefore, in this embodiment, as shown in FIG. 22, the roller guide 34 is pivotally supported on the upper end of the lower snow guide 27a so that the escape portion I is moved to the lower snow guide 27a. By forming it, the sheet S is prevented from being caught.

The roller guide 34 has a spring 37.
As shown in FIG. 23, the sheet is urged in the direction of arrow A, but when the sheet is discharged, the link 36 that is pushed down by the swinging swinging guide 31 rotates in the direction opposite to the direction of arrow A and escapes I ( (See FIG. 22). At this time, the paper stopper portion 35 protruding from the upper end of the roller guide 34 is housed inside the surface of the discharge roller 32 so as not to interfere with the sheet discharge.

When the swing guide 31 swings upward to release the discharge port 50 at the time of stapling, the roller guide 34 is returned by the spring 37 to return to the paper stopper portion 3.
5 is projected above the tray 24, and is configured to be flush with the lower snow guide 27a, so that the stapled sheets stacked on the tray 24 do not get into the escape portion I and get caught. I have to.

On the other hand, when a large amount of normal sheets S are to be taken, first, the paper presence sensors 23a, 24a, 25a (see FIG. 2) installed on the first, second, and third trays 23, 24, 25 are used. After confirming that no sheets remain on the trays 23, 24, 25, the tray unit 26 moves to a predetermined position for receiving the first sheet of the first tray 23.

Further, when the number of stacked sheets reaches a certain number, the tray unit 26 descends to a position where the upper surface of the stacked sheets is almost the same as the surface receiving the first sheet. When the above operation is repeated to detect that the maximum amount of sheets has been stacked in the tray, a stop signal is issued to the copying apparatus main body 100 to temporarily stop the sheet discharge.

Next, the tray unit 26 is the second tray 2
In order to stack the sheets at 4, the sheet is lowered to the position where the first sheet of the second tray 24 is stacked. Thereafter, the copying apparatus main body 100 restarts the copying operation and restarts the stacking of the sheets. Thereafter, the same operation as described above is repeated until the tray 24 is full. The third tray 2
When sheets are stacked on the first tray 23, the second tray
This is the same as when moving to the tray 24.

In the present embodiment, the copying apparatus main body 100 is of a digital type, and the copying apparatus main body 100 of this type is composed of a scanner section for reading an image of an original and a printer section for reproducing the image. It is also possible for each to operate independently. That is, in the scanner section, the original is illuminated by a lamp, and the reflected light is decomposed into small dots (pixels) by the light receiving element and at the same time converted into an electric signal according to the light and shade of the original (photoelectric conversion). The drum is irradiated with laser light based on an electric signal sent from the unit, an electrostatic latent image is formed on the drum, and a copy image is formed through development, transfer and fixing.

Therefore, by connecting the interface 500 to the digital copying machine as shown in FIG. 1, the signal of the original read by the scanner unit is transferred to another facsimile 501.
Alternatively, it is also possible to transfer the electric signal received from another facsimile 501 to the printer section through the interface 500 and to transfer an image onto a transfer sheet. Similarly, an image signal received from a computer device 502 such as a personal computer is sent to a printer unit through an interface 500 to be copied onto a transfer sheet, or an image read by a scanner unit is taken into the personal computer through an interface 500. It can be drunk.

As described above, in the current digital copying machine, the original sent from the ADF 300 and the original table glass 10 are used.
In addition to reading and copying a document placed on 0, interposing an interface 500
It can be used as a facsimile or as a printer for a personal computer.

By the way, in order to use the main body 100 as described above, the sheets are classified and stacked in different trays, or each tray is numbered according to the user's wishes so that the user's wishes can be satisfied. Sheets need to be stacked on the tray.

For this reason, in the present embodiment, for example, facsimile output paper is used for the first tray 23 and the second tray 2 is used.
The output paper from the personal computer is placed on the sheet 4, and the output paper in the copy mode is placed on the third tray 25. Then, the case of discharging the sheet to each tray in this way will be described.

First, description will be made of a case where sheets in the copy mode are stacked on the second tray 24 shown in FIG. 24 when a certain number of output sheets from the personal computer are received, that is, a case where sheets are stacked on the third tray 25.

When the second tray 24 receives a certain number of sheets of output paper from the personal computer and stacks the sheets on the third tray 25, the tray unit 26 descends and the first sheet of the third tray 25 is removed. The operation moves to the receiving position, but this operation is the same as that in the copy mode except that the operation is performed even if the number of stacked sheets in the tray is not the maximum.

Next, a description will be given of a case of stacking output paper such as a facsimile, that is, a case of stacking sheets on the first tray 23 in a state where the second tray 24 receives a certain number of output papers of the personal computer.

In this case, the tray unit 26 is raised to stack the sheets on the first tray 23 while the sheets are stacked on the second tray 24. At this time, the sheet S is prevented from entering the space F shown by the diagonal lines in FIG.
As shown in FIG. 5, the stopper 30 is rotated from the position indicated by the broken line in the figure to the position indicated by the solid line by using the rotation shaft 30a as a fulcrum to close the space F.
It is possible to move upwards while loading.

As a result, the tray on which the sheets S are stacked can cross the discharge port 50, so that the performance of the copying apparatus main body 100 having an interface can be fully utilized.

The sheet abutting surface 30b of the stopper 30, the upper snow guide 27 and the lower snow guide 27a are provided with a swing guide 3 so that the sheet can easily slip.
The ribs 311 (see FIG. 21) are formed on the first sheet abutting surface 31b. FIG.
As shown in FIG. 3, the sheet abutting surface 31 of the swing guide 31
By using b as a part of the upper snow guide 27, the space between the trays can be narrowed, and the tray unit 26 can be downsized.

Next, the stapling operation of the sheet post-processing apparatus will be described.

First, at the time of staple sorting in which stapling is performed to make a copy, the sheets are not directly stacked on the trays 23, 24 and 25, but are first stacked on the staple tray 38 in FIG.

When the staple sort mode is selected by the user, the swing guide 31 opens the discharge port 50 as shown in FIG. 26, and the discharge rollers 32 and 33.
When the swing guide 31 swings in this manner, the roller guide 34 is held by the spring 37 in the same plane as the lower snow guide 27a, as described above. The paper stopper 35 is the tray 24
Of the stacked sheet bundle Sa.

In this state, the sheet discharged from the copying apparatus main body 100 passes through the conveying path 6 and the roller pair 1
After being passed to the rollers 7 and 18, they are discharged by the roller pairs 17 and 18, but since the swing guide 31 is swinging upward, the sheet is not discharged and the staple tray 38 is discharged.
Loaded on top. At this time, the tray 24 is located above the non-staple mode and assists in supporting the rear end of the sheet S and returning to the upstream side in the discharge direction as shown in FIG.

On the other hand, the sheet S discharged onto the staple tray 38 as shown in FIG.
And the sheet fall position of the tray 24 are set to be higher, which helps to drop the sheet toward the upstream side by its own weight by the discharge alignment belt 19 that rotates in the arrow direction in synchronization with the discharge roller 17. It is urged in the upstream direction on the staple tray.

As a result, the sheet S is moved to the rear end regulating member 20
Is abutted against and aligned with the direction perpendicular to the ejection direction. Further, the alignment of the sheets in the width direction is started at a predetermined time when the sheet S is dropped onto the staple tray 38 and abuts against the abutting plate 20 by the width aligning guide 21 in FIGS. The sheet S is aligned in the front direction by moving the main body from the back side to the front side by a predetermined dimension. Hereinafter, for the second and subsequent sheets, the above operation is repeated until all the sheets set by the user are stacked on the staple tray. 28 and 29, reference numeral 29 is an alignment reference plate.

Then, as shown in FIG. 30, when the number of sheets set by the user is aligned on the staple tray 38, the stapling is operated and the operation of stapling to the position set by the user is performed. Note that when stapling is completed, FIG.
As shown in FIG.
As the sheet 2 rotates in the direction of the arrow, the stapled sheet S on the tray 38 is discharged as shown in FIG.

By the way, during the stapling operation, since the sheets are sequentially ejected from the copying apparatus main body 100, the leading first sheet of the ejected sheets of the next job is retained in the main body 1 and the second sheet is piled up. And discharge it.

The operation will be described with reference to FIGS. 33 to 36. FIG. 33 shows a state in which the sheet starts to enter the inside of the apparatus.

The first sheet S1 discharged from the copying apparatus main body 100 is sent to the buffer path 8 when the upstream end portions of the flappers 3 and 4 are positioned downward. The sheet S1 sent to the buffer path 8 is sent in the direction of the arrow in the figure in the form of being wrapped around the buffer roller 9. Here, the flapper 39 rotates so that the sheet is fed toward the roller 15, and the sensor 11 detects the leading edge of the sheet S1 and stops in the state as shown in FIG.

Then, when the second sheet S2 enters as shown in the figure, the buffer roller 9 starts rotating, and as shown in FIG. 35, the first and second sheets S2.
1 and S2 are stacked and transported. Furthermore, the first sheet S
When the trailing end of 1 passes the position of the flapper 39, the flapper 39 rotates so that the sheet S is fed toward the discharge rollers 17 and 18, as shown in FIG. Discharged to the top. By performing the above operation, the sheet is not ejected from the ejection rollers 17 and 18 during the stapling operation of the stapler, the stapling operation can be executed, and the copying apparatus main body 100 is stopped. There is no.

Further, in order to further increase the time for performing the stapling operation, it is possible to wind the third or more sheets around the buffer roller 9.

By repeating the above operation, a plurality of staple copy bundles Sa are created. However, as shown in FIG. 26, when there is already stapled copy bundle Sa on the tray 24, the copy bundle Sa is When the upper end of the already stacked copy bundle Sa exceeds the point G when the deflection or bulge is large, the next sheet comes out and is jammed, or the width alignment guide 21 operates. This may be a load for matching and may deteriorate the matching.

However, at this time, as described above, the roller guide 34 is located at the same position as the lower snow guide 27a, and the stopper member 35 presses the upper end surface of the sheet bundle Sa on the tray 24. Since it is projected above, the upper end of the stacked copy bundle Sa will not exceed the point G upward.

[0120]

As described above, according to the present invention, it is possible to move the post-processing means along the end of the sheet bundle on the side where the sheets are bound, and at the time of movement, the second end is provided on the guide rail.
By holding the guide supporting member, the post-processing means can be moved in a posture capable of parallel binding or oblique binding tilted in a predetermined direction, and by holding the third guide supporting member on the guide rail, the post-processing means can be operated. It can be moved in a posture in which it can be bound in a reverse diagonal direction and is inclined in a direction opposite to the predetermined direction. Then, by making it possible to regulate the posture of the post-processing means with such a simple structure, it is possible to downsize the apparatus and reduce the cost.

[Brief description of drawings]

FIG. 1 is a side sectional view of a sheet post-processing apparatus and a copying apparatus embodying the present invention.

FIG. 2 is a side sectional view of the sheet post-processing device.

FIG. 3 is an explanatory diagram of a staple binding position by a stapler unit of the sheet post-processing device.

FIG. 4 is a side sectional view of the stapler unit.

FIG. 5 is a schematic top view showing a movement path of the stapler unit.

FIG. 6 is a right side partial sectional side view of the stapler unit.

FIG. 7 is a partial perspective view of a guide rail that holds a second or third guide support member of the stapler unit.

FIG. 8 is a diagram showing an operation of a retracting unit of the stapler unit.

FIG. 9 is a view showing the operation of the stapler unit and the trailing edge regulating member.

FIG. 10 is a diagram showing a structure of an electric stapler of the stapler unit.

FIG. 11 is a plan view of the electric stapler.

FIG. 12 is a waveform diagram showing a current value flowing through a staple motor in a stapling process by the electric stapler.

FIG. 13 is a view showing a state in which the leading edge of the needle is held in the holding groove of the needle bending block at the center.

FIG. 14 is a view showing a needle striking process of a forming unit of the electric stapler.

FIG. 15 is an explanatory diagram of a staple cartridge and a staple for the electric stapler.

FIG. 16 is a diagram showing the positional movement of the stapler unit when replenishing the staples.

FIG. 17 is a diagram showing a state of the electric stapler at the time of starting the staple supply.

FIG. 18 is a diagram showing a state in which the electric stapler is slid along a supporting member.

FIG. 19 is a view showing how the staple cartridge is attached to and detached from the electric stapler.

FIG. 20 is a diagram showing a state in which sheets are discharged to a second tray of the sheet post-processing apparatus.

FIG. 21 is a diagram showing how the swing guide of the sheet post-processing device swings.

FIG. 22 is a diagram showing how a sheet is discharged to a second tray of the sheet post-processing device.

FIG. 23 is a diagram showing a state in which the roller guide of the sheet post-processing device is in a position where an escape portion is formed.

FIG. 24 is a diagram showing a state where output sheets from a personal computer are stacked on a second tray.

FIG. 25 is a view showing a state where the stopper of the sheet post-processing device has blocked the discharge port.

FIG. 26 is a view showing a state where the swing guide swings upward.

FIG. 27 is a diagram showing a state of the second tray at the time of staple sorting.

FIG. 28 is a plan view of a staple tray portion of the sheet post-processing device.

FIG. 29 is a side sectional view of the staple tray portion.

FIG. 30 is a view showing a state in which the number of sheets set by the user is aligned on the staple tray.

FIG. 31 is a diagram showing how a stapled sheet is discharged.

FIG. 32 is a diagram showing how a stapled sheet has been ejected.

FIG. 33 is a view showing a state in which a sheet has started to enter the sheet post-processing apparatus.

FIG. 34 is a view showing a state in which the first sheet is wound around a buffer roller.

FIG. 35 is a view showing the manner in which the first and second sheets S1 and S2 are stacked and conveyed.

FIG. 36 is a diagram showing a state in which two sheets are discharged in a stacked state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 sheet post-processing apparatus 20 rear end regulating member 38 staple tray 100 copying apparatus 400 electric stapler 432 stay 433 moving table 437 guide rail 437a first area 437b second area 434 first guide support member 435 second guide support member 436 third Guide support member 447 Guide groove S sheet Sa sheet bundle

Front page continuation (72) Minoru Kawanishi Minoru 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Hiroaki Namiki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (6)

[Claims] 1. A post-processing tray for stacking sheet bundles when binding sheets, and post-processing means for performing a binding operation on a sheet bundle stacked on the post-processing tray.
In the binding operation, the post-processing means is moved to a predetermined binding position according to the binding position of the sheet bundle.
In the post-processing apparatus, a guide groove that is provided so as to face the post-processing tray and that extends along the end of the sheet bundle on the side to be bound, and a guide rail that is disposed along the guide groove are provided. And a first base, a second base, and a third guide support member for holding the post-processing means, the first guide support member being always held in the guide groove of the base, A holding member for moving the post-processing unit along the end of the sheet bundle on the side where the sheet bundle is bound, while holding one of the third guide supporting members on the guide rail, and the post-processing unit includes the guide rail. When the second guide support member is held by the guide rail, the second guide support member moves in a posture capable of parallel binding or oblique binding in a predetermined direction relative to the sheet bundle, and the guide rail holds the third guide support member. Done Sheet when there is characterized by being configured to move in a predetermined direction opposite to the inclined opposite oblique stapling possible attitude - DOO post-processing apparatus. 2. The first and third regions for holding only the second guide support member while the second and third guide support members are mounted on the moving holding member with different mounting heights. The sheet post-processing apparatus according to claim 1, wherein a second region that holds only the guide support member is formed. 3. A post-processing tray for stacking a large number of sheets discharged from the image forming apparatus, and post-processing means for performing post-processing such as binding on a sheet bundle stacked on the post-processing tray. In a sheet post-processing apparatus including a moving unit that moves the post-processing unit to a predetermined post-processing position of the sheet bundle, the position and angle of the post-processing unit with respect to the sheets stacked on the post-processing tray. The sheet post-processing apparatus is characterized in that the first regulation support member is regulated by the first regulation member and the second regulation member is regulated by the second regulation member. 4. The first guide support member is always the first guide support member.
The position of the second guide support member is restricted by the restriction member, the position of the second guide support member is restricted by the second restriction member in a specific region, and the second guide support member of the third guide support member is controlled by the second restriction member. 4. The sheet post-processing device according to claim 3, wherein the position is regulated by the second regulation member outside the region where the position is regulated. 5. An area in the height direction in which the second restricting member restricts the position of the second guide support member, and an area in the height direction in which the second restricting member restricts the position of the third guide support member. 4. The sheet post-processing device according to claim 3, wherein the sheet post-processing device has a difference. 6. An image forming apparatus comprising an image forming section and a sheet post-processing apparatus for post-processing a sheet on which an image is formed by the image forming section, wherein the sheet post-processing apparatus is any one of claims 1 to 3. 5. An image forming apparatus, which is the sheet post-processing apparatus according to item 5.