JPH09202517A - Paper post-processing device for image forming equipment - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: Even if a post-processing device for aligning sheets ejected from a copying machine, a printer or the like and binding them as a unit is miniaturized, a user can bind sheets at a plurality of desired positions. It can be so. SOLUTION: An anvil portion 52 for folding staple needles is provided at a plurality of positions on a jogger table 11 for aligning sheets, and a stapler 5 moves so that the anvil portion 52 can be selectively used.

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 device for an image forming apparatus such as a copying machine or a printer.

[0002]

2. Description of the Related Art Many proposals have been made for this type of sheet post-processing apparatus, for example, Japanese Patent Laid-Open No. 4-3168.
94, JP-A-6-1512, JP-A-59-
In the technology disclosed in Japanese Patent No. 22797, a post-processing device (finisher) for a copying machine and a printer is miniaturized, so that when the sheets are in the aligning device section and the binding section, a part of the sheets is placed on the discharge tray. The size is smaller than that of the device in which the sheet aligning device section and the sheet stacking section of the binding section and the stacking section of the discharge tray are completely separated. The smallest size of the device can be achieved when the positions of the discharge tray, the aligning device part, and the binding part, particularly the position on the plane, match.
Further, in this type of apparatus, the stapler for performing the stapling work is configured to spell the upper left when the paper is placed vertically when the size is A4 or LT.

[0003]

SUMMARY OF THE INVENTION The present invention is intended to solve various problems that cannot be realized by the above-described conventional sheet post-processing apparatus. The purpose is to allow the user to perform the binding work at the desired position and to allow the stapler to make a flat striking instead of spectacles as the bending method of the tip of the stapler.

Further, when this type of device is used as a post-processing device of the printer, the sheets are fed in page order, and therefore the binding direction of the stapler must be set from the jogger base side to allow the staples to be stapled. Although it comes out to the front side, when performing binding work from the jogger base side, the anvil (folding part of the staple) is located on the paper alignment work surface (the surface where the paper is discharged and stacked). It must be retracted to a position that does not interfere with the stacking of paper. Therefore, the present invention provides an apparatus capable of easily performing such an anvil retracting operation.

Further, when the sheets are bound from the jogger table side, or when the stapler is provided on the upper side of the sheets and the flat striking anvil is provided on the lower side of the jogger table, the sheets are moved to the discharge tray after the binding operation. Even if the jogger stand is evacuated to prevent it, the stapler and anvil under the jogger stand interfere, and the bound paper cannot be completely dropped on the output tray. Therefore, the present invention provides an apparatus capable of easily performing such a retracting operation of the stapler or anvil and a returning operation to the original position.

[0006]

A sheet post-processing device of an image forming apparatus according to the present invention is a copying machine,
After the sheets ejected from the main body of the image forming apparatus such as a printer are aligned on the jogger table by the stapler and bound as a part, the jogger table is moved and retracted, and the bound sheet is moved to the sheet ejection tray. In the sheet post-processing apparatus of the apparatus, at least two anvil portions for folding staple needles for binding the sheets are provided on the jogger table, and the stapler moves to enable the anvil portion to be selectively used. Characterize that.

According to a second aspect of the present invention, there is provided a sheet post-processing apparatus for an image forming apparatus, wherein an escape hole for allowing the stapler to act and a staple for a staple are provided on the jogger table at a place where the stapler needs to bind the sheets. It is characterized by having a hole.

The sheet post-processing device of the image forming apparatus according to the third aspect is provided with an anvil that can be moved when aligning the sheets on the jogger stand, and the sheets fed in page order are sent to the jogger stand side. It is characterized in that the movable anvil is moved in a direction of separating from the sheet 7 at the time of aligning the sheets on the jogger table in the case of performing the binding operation from the beginning.

According to the fourth aspect of the present invention, in the sheet post-processing device of the image forming apparatus, when the sheets bound on the jogger table are moved to the sheet ejection tray, the jogger table is retracted from the lower surface side of the sheet at the same time. , The stapler is also retracted at the same time, the sheet is once moved to the tip end of the stapler, and when the stapler returns to the original position, the sheet is moved to a predetermined position of the discharge tray. And

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the basic configuration of a sheet post-processing device of this type of image forming apparatus. In the figure, 1 is a paper upper surface detection filler, 2 is an ejector, 3 is a jogger fence, 4 is an alignment roller, 5 is a stapler, 6 is a pair of paper discharge rollers, 7 is paper, 8 is a paper discharge tray, and 9 is a paper guide member. 10 is a paper guide member lower, 11 is a jogger stand, 12
Is a paper rear end upper surface detection member, 13 is a jogger moving pulley, 38 is a crunch section, and 39 is a tray end fence. Paper guide member upper 9 and paper guide member lower 10
Is for guiding the sheets 7 ejected from the main body of the image forming apparatus to a position where the sheets 7 are aligned and bound together.
Is discharged onto the jogger table 11. Jogger stand 11
If the sheet 7 is longer than the sheet 7, the leading edge of the sheet 7 is placed on the leading edge of the previously bound sheet.

In the jogger section, in addition to the jogger base 11, a jogger fence 3 for aligning the width direction of the paper 7 in the direction perpendicular to the conveying direction, and facing the jogger fence 3, the opposite side of the paper 7 in the width direction is provided. There are an ejector 2 for pressing and pushing out after stapling from a stapler 5, and an aligning roller 4 for aligning in the transport direction.

The sheet aligning operation of this apparatus will be described with reference to FIGS. First, the paper is ejected to the position of the paper 7a in FIG. 2 and is pushed into the crunch section 38 of the stapler 5 by the jogger fence 3 and at the same time the ejector 2 is ejected.
2 and is aligned with the position of the sheet 7 in FIG. Further, a conveying force is applied by the aligning rollers 4 in a direction opposite to the conveying direction of the paper 7, and the rear end of the paper 7 is abutted against the end fence 20 of FIG. 3 to align the paper 7.

When the sheets 7 are aligned, the stapling machine 5 performs the binding work. When the binding work is completed, the jogger table 11 moves as shown in FIG.
Move up. Since the front end of the paper 7 is placed on the paper discharge tray 8, the rear end of the paper 7 falls and moves to the paper discharge tray 8 side. After moving the paper 7 onto the discharge tray 8,
The paper upper surface detection filler 1 detects the height of the upper surface of the paper 7, and when the height is higher than a preset height, the paper discharge tray 8
Lower the height of.

The paper rear end upper surface detection member 12 detects the height of the rear end of the paper 7. Paper 7 to stapler 5
If the sheets are bound with, and several or more of the bound sheets are stacked, the bound portion tends to be higher than the other portions due to the staple needle. If this portion becomes too high, the jogger base 11 and the paper 7 on the paper discharge tray 8 contact each other, and the jogger base 1
You cannot move 1.

The sheet rear end upper surface detection member 12 is set at the limit point of the height of the bound portion, and the bound sheet 7
When the upper surface of the trailing edge is detected, the binding work is stopped, and a signal for removing the bundle of sheets 7 is output from the discharge tray 8. Even before the sheet rear end upper surface detection member 12 detects, if the discharge tray 8 is lowered to the limit (the position indicated by 8a in FIG. 1), the bundle of sheets 7 is placed on the discharge tray 8. Need to be removed from. If you are not binding,
The paper 7 may be discharged onto the paper discharge tray 8 while the jogger table 11 is moved to the position shown in FIG. In that case, paper alignment work is not performed either.

FIG. 5 is a perspective view showing the structure of the jogger base unit. The jogger stand 11 is a jogger stand guide 4
Both ends are held by the grooves 0 and 41, and the movement is guided. The tip ends of the moving levers 42, 42 are engaged with both ends of the jogger base 11, and the jogger base 11 moves along the jogger guides 40, 41 by the rotation of the moving lever 42. The moving lever 42 is fixed to the moving lever shaft 43, and the rotation of the moving lever shaft 43 causes the moving levers 42, 42 to rotate. A shaft rotating lever 44 is provided at one end of the moving lever 42, and the solenoid 45 pulls the shaft rotating lever 44 via a link 46, whereby the moving lever shaft 43 rotates. The return spring 47 is for returning the shaft rotation lever 44 to the original position when the solenoid 45 stops the suction. It is also possible to use a motor instead of the solenoid.

FIG. 6 is a perspective view showing an example of a method of moving the jogger fence. The jogger fence 3 can be guided and moved by the jogger guide shaft 24. The jogger movement timing belt 25 is stretched over the jogger movement pulleys 13 and 13, the middle part of the timing belt 25 is fixed to the jogger fence 3, and the jogger fence 3 also moves when the timing belt 25 moves. . The movement of the timing belt 25 is performed by rotating the jogger moving pulley 13 by the drive motor 26. Generally, a stepping motor is used as the drive motor 26 for managing the position of the jogger fence 3. Also, jogger fence 3
A micro switch, a photointerrupter, a light reflection type sensor, etc. are used to detect the home position of, but are not shown.

FIG. 7 is a perspective view showing a state in which the sheets 7 are bound and pushed out from the stapler 5. For the sake of explanation, the jogger base 11 is omitted. The paper 7 sent from the image forming apparatus main body side is inserted into the opening of the stapler 5 by the jogger fence 3 and at the same time the ejector 2 is inserted.
Align with the working surface of. The sheet feeding direction is performed by the aligning device described later. When the alignment of the predetermined number of sheets 7 is completed, the stapling machine 5 performs the binding work, and after the binding work is completed, the bundle of sheets 7 bound by the ejector 2 is placed at the position of 7a in the figure. Push out from. At this time, the jogger fence 3 is moved to the position 3a in the drawing so as not to hinder the movement of the paper 7. Thereafter, the jogger table 11 moves to the position shown in FIG. 4, so that the sheet 7 moves to the position 7b shown in FIG. After that, in order to receive the next paper, the position of the paper discharge tray 8 is slightly lowered, and at the same time, the jogger table 11 is returned to the position shown in FIG.

FIG. 8 is a perspective view showing the basic elements of the apparatus for aligning the sheets 7. The ejector 2 pushes out the paper 7 from the opening of the stapler 5 and, at the same time, positions the front end surface of the paper 7. The end fence top 20 and the alignment roller 4 align the feed direction of the paper 7. When the paper 7 comes in, the aligning roller 4 is lifted so as not to interfere with the conveyance, and when the paper 7 is completely entered, the alignment roller 4 descends so as to come into pressure contact with the paper 7, and the rear end of the paper 7 is placed on the end fence 20.
Rotate to feed in the direction of hitting. The conveying force of the aligning rollers 4 is set to such a magnitude that the paper 7 does not buckle.

FIG. 9 is a perspective view showing the mechanism of the ejector unit. The ejector 2 can move along the ejector guide shaft 27, and a crank rod 28 is provided at one end of the ejector 2, and the opposite end thereof is connected to the crank 29. The crank 29 is connected to the shaft of the drive motor 30. The stop position of the crank 29 is detected by a reflective sensor (not shown), a photo interrupter, a micro switch, or the like. The drive motor 30 is a stepping motor or a DCAC motor with a reduction gear, and may have a force sufficient to push out the bound sheets 7 from the opening of the stapler 5. When aligning the sheets, if the crank 29 is located at the bottom dead center, the ejector 2 does not move even if the action surface of the sheet 7 is pushed.

FIG. 10 is a side view showing an example of a mechanism of a sensor for detecting the positions of the central upper surface and the rear end upper surface of the paper 7.
11 and 12 are the same perspective views. The paper upper surface detection filler 1 detects a high position near the center of the paper 7, and the paper rear end upper surface detection filler 23 detects a height near the position of the stapler 5 when the paper 7 is bound. This is because the staple needle 50 that has been bound causes the height of the staple needle 50 to be higher than that of the other portions, and the stack of sheets 7 may not be placed on the discharge tray 8 well. The positions of the fillers 1 and 23 are detected by the photo interrupters 21 and 22.

FIG. 13 is a perspective view of a mechanism for moving the aligning roller 4 up and down. The alignment roller 4 is driven by transmitting the rotation of the drive motor 17 through the timing belt 49. The upper and lower levers 14 are connected to the link 1 by the attraction of the solenoid 15.
Lower the alignment roller 4 through 6. Return spring 19
Is for returning the up / down lever 14 to its original position when the suction of the solenoid 15 is completed.

FIG. 14 is a side view of a mechanism for moving the paper discharge tray 8 up and down. The discharge tray 8 is provided with a guide roller unit 32, and the guide roller unit 32 allows the tray to be moved up and down along the tray guide 31. The tray tray 8 is moved up and down by a tray movement timing belt 35 which is wound around a tray movement lower pulley 33 and a tray movement driving pulley 34. Tray movement drive pulley 34
Is performed by transmitting the rotation of the drive motor 36 to the tray movement drive pulley 34 via the deceleration timing belt 37. A worm gear may be used for deceleration when it is desired to increase the extinction ratio and for stopping the discharge tray 8 in the middle.

FIG. 15 is a sectional view showing an anvil 52 for bending the tip of the stipple needle 50 after the stipple needle 50 is penetrated through the paper 7 or the transfer paper 51. The example of FIG. 15 is for folding the stipple needle 50 like spectacle folding. As a method for bending the needle, as shown in FIG. 39, a spectacle fold 86 is a general bending method. However, when a large number of copies are desired to be processed, the height of the bent part becomes higher than other methods. If you stack a lot of parts, the height of the bundle of sheets bound will be too high. Of course, if the number of copies is small, there is no problem.

FIG. 16 is a side view showing a state in which the position of the stapler 5 in FIG. 2 is moved onto the jogger base 11. In this case, it is necessary not to interfere with the jogger fence 3 and the alignment roller 4.

FIG. 17 is a plan view of an example in which a plurality of anvils 52 are provided on the jogger base 11 in order to enable the binding work by selecting from a plurality of binding positions on the paper 7, and FIG. FIG. Stippla 5 is
The sheet 7 can be moved in a direction perpendicular to the conveying direction.

FIG. 19 is a perspective view showing an example of a moving device for the stapler 5. The stapler 5 is movable with respect to the guide shaft 58, and the cam 90 also moves together with the stapler 5. A linear groove is formed on the shaft 89 of the cam 90, and the groove and the projection of the hole of the cam 90 are engaged with each other, and the drive is transmitted from the shaft 89 to the cam 90. Stippura 5
Is pushed by the cam 90 and is pressed against the paper surface of the paper 7.

The shaft 89 is driven by the mechanism shown in FIGS. 32 and 33. One rotation of the shaft 89 hits one staple needle, but the rotation of the shaft 89 is detected by a combination as shown in FIG. The encoder 92 is provided with only one notch 94, and the pulse signal generated by passing the notch 94 is detected to detect the rotation of the shaft 89.

FIG. 20 is a side view showing a state in which the paper 7 is sent in page order. In this case, since the image side, the first page, or the cover is the side of the jogger table 11 side, it is necessary to perform the binding work from the lower side in FIG. In this case, the movable anvil 59 is retracted from the moving range of the paper 7 in order to normally eject the paper 7 onto the jogger table 11 by the paper ejection roller 6. The binding work is performed by moving the movable anvil 59 and the stapler 5 to the surface of the sheet 7 as shown in FIG.

The stippler 5 may be reversed in direction as in FIG. The stapler 5 can be moved in the direction perpendicular to the paper 7 by a driving system using a stepping motor 54, a drive pulley 57, a driven pulley 56, and a timing belt 55 as shown in FIG. The jogger base 11 needs a staple hole 61 as shown in FIG. 22 through which the needle striking portion of the staple 5 passes in order to carry out a splicing operation. By selectively using the stipple hole 61, it is possible to bind a desired place on the paper 7.

In this case, after binding the sheets 7, the jogger table 11 is retracted, and at the same time, the stapler 5 is also retracted to the position shown in FIG. 23 so that the sheets 7 can fall onto the sheet discharge tray 8. After the sheet 7 is moved onto the sheet discharge tray 8, the sheet returns to the original position as shown in FIG. 24 and stands by for spelling the next sheet 7.

The size of the paper 7 is A4, LT (8.5 ")
In the case of about × 11 ″), it may be done as shown in FIGS. 23 and 24, but in the case of a large size such as A3 and DLT (11 ″ × 17 ″), the front end of the paper 7 is placed on the discharge tray 8. If the paper 7 to be bound is placed on the jogger table 11 so that it is placed on the paper, it becomes easy to align the paper 7 on the jogger table 11. The paper is ejected onto the paper 11, but due to inertia at the time of paper ejection, the paper slightly advances to the front side of the paper ejection tray 8, and the jogger table 11 and the paper ejection tray 8 are ejected.
Alternatively, it returns until it hits the end fence 20 along the inclined surface formed by the paper on the paper discharge tray 8. The aligning roller 4 may be configured to forcibly return it.
If the leading edge of the sheet 7 discharged by the pair of sheet discharging rollers 6 does not exceed the leading edge of the sheet on the sheet discharging tray 8, the work of returning the sheet 7 in the direction of the end fence 20 becomes easy. The jogger table 11 may be made large, but if so, the space for retracting the jogger table 11 becomes large, and the entire apparatus becomes large.

By the way, when aligning and stapling the sheets 7, the upper side of the stack of sheets 7 stacked on the discharge tray 8 is used as a means for downsizing the apparatus. Although the size can be reduced, when the next spelling operation is performed and the bundle of sheets 7 is already placed on the discharge tray 8, the size of the already placed sheet 7 is smaller than the size of the sheet to be worked next. There is. In such a case, if the trailing edge of the paper on the discharge tray 8 and the trailing edge of the paper on the jogger base 11 are located at the same position, the leading edge of the paper on the jogger base 11 will flow. The downstream side of the direction,
In some cases, the paper may be ejected ahead of the tip of the paper ejection tray 8 and the paper may not be neatly aligned. In order to prevent this, it is preferable to slightly move the position of the jogger table 11 to the upstream side in the sheet flow direction. When the jogger table 11 is moved to the upstream side, the paper 7 on the jogger table is completely moved onto the discharge tray 8 even if the jogger table 11 (and the stapler 5 if there is the stapler 5 on the lower side) is retracted. However, the trailing edge of the sheet 7 remains in the portion where the stapler 5 was located before it was retracted. Therefore,
As shown in FIG. 25, about 1/4 to 1/2 of the length of the paper 7 is configured to be placed on the jogger table 11, and the front end of the paper 7 on the jogger table is set to the front end of the paper 7 on the discharge tray 8. However, it is considered most preferable to set the position at a distance of several tens of millimeters. However, even in this case, even if the jogger base 11 and the stapler 5 are retracted, the paper 7 does not drop completely onto the paper output tray 8, and the side bound to the station portion of the stapler 5 drops as shown in FIG. Can be. However, when the stapler 5 returns to the binding work position, the stapler 5 may be pushed out onto the discharge tray 8. if,
When the binding work is not performed, the stapler 5 may be configured to alternately repeat the position of FIG. 25 and the position of FIG. 26 for every certain number of sheets.

FIG. 27 is a front view showing a mechanism for moving or moving the anvil 52 up or down when binding from below the paper 7.
28 is a plan view of the same, and FIG. 29 is a side view of the same. As shown in FIG. 27, the anvil slide base 60 moves in the direction of the slide shafts 62, 62 by the timing belt 64. As shown in FIG. 34, the timing belt 64 is stretched around a driven pulley 74 and a drive pulley 75 attached to the shaft of the anvil moving motor 72. The anvil slide table 60 is moved by the anvil moving motor 72.

In the paper surface detection switch 66 shown in FIG. 28, when the anvil 52 is slid up and down, the height of the paper 7 on the jogger table 11 changes depending on the thickness of the paper 7 per sheet and the number of stacked sheets. Therefore, it is for accurately stopping on the paper surface of the paper 7. Paper surface detection pin 67
When the paper comes into contact with the surface of the paper 7, the paper slides up and presses the paper surface detection switch 66, whereby it is detected that the anvil 52 has reached the paper surface, and the anvil vertical drive motor 68
To stop.

The anvil 52 is an anvil slide base 60.
And a vertical drive gear 63 mounted on the slide shaft 62 on the surface on the slide shaft 62 side.
It meshes with but is located. By rotating the slide shaft 62, the anvil 52 can be moved up and down by the rotation of the vertical drive gear 63. The rotation of the slide shaft 62 is performed by a worm gear device attached to one end thereof as shown in FIGS. Since the worm gear is used, the reduction ratio can be increased and the slide shaft 62 can be fixed at a free position. For the reference position of the anvil 52, which is separated from the paper surface of the paper 7, a position detecting unit in the rotational direction of the shaft as shown in FIG. 40 may be used. Also slide shaft 6
2 to rotate the anvil vertical motor 68 to warm 6
9. The worm wheel 70 decelerates and transmits the rotation to the slide shaft 62.

FIG. 35 is a front view showing an anvil for a flat punch crunch 87, and FIG. 38 is a side view of the same. The staple folding levers 78 and 79 are provided after the staple needle penetrates the sheet 7.
The needle folding drive gear 76 mounted on the slide shaft 62 moves the needle folding rack 80 downward, and the needle folding pushing member 77 mounted on the needle folding rack 80 is moved to the position shown in FIGS. , The flat crunch 87 shown in FIG. 39 is created.

At the end of the slide shaft 62, as shown in FIGS.
A drive device as shown in FIG. Mobile anvil 5
When 9 moves toward the paper surface of paper 7, slide shaft 62 also rotates in the same direction as slide shaft 62 by needle folding rack 80. At this time, since the needle folding drive motor 81 is not rotating, the one-way clutch 84 attached to the worm wheel 83 causes the slide shaft 62 to idle. When the paper detection switch 66 detects the paper surface of the paper 7, the drive of the slide shaft 62 is stopped. After that, the stapler 5 is operated to cause the staple needle 96 to penetrate the sheet 7.

Then, as shown in FIG. 43, when the staple needle 96 penetrates the sheet 7, the needle folding drive motor 81
To drive the worm wheel 83 in a direction to move the needle folding rack 80 downward. When the worm wheel 83 is rotated in this direction, the one-way clutch 84 does not idle and transmits the driving force, so that the slide shaft 62 moves the needle folding member 77 downward. Needle folding member 77
However, when the needle folding levers 78 and 79 are pushed down, the tip of the staple needle 96 is pushed and bent as shown in FIG. After that, the movable anvil 59 and the stapler 5 return to their original positions.

When the movable anvil 59 returns to its original position, the anvil up / down motor 68 and the needle folding drive motor 8
1 reverse at the same speed or needle folding drive motor 81
Must be reversed faster than the ampoule up / down motor 68. This is because the one-way clutch 84 does not idle in the direction in which the slide shaft 62 is rotated in the reverse direction and the needle folding pushing member 77 is raised, so the needle folding drive motor 81 must also rotate in the reverse direction.
Worm wheel 83 locks to move anvil 59
This is because it cannot be returned to its original position.

When the sheets 7 are bound as shown in FIG. 45, the bundle of sheets 7 is finally moved onto the sheet discharge tray 8 and the operation is completed.

[0042]

Since the sheet post-processing apparatus of the image forming apparatus according to claim 1 is as described above, the sheets after the image forming processing is completed by the copying machine or the printer are aligned, and the stapling work is performed by the staple. There is an effect that the apparatus to be used is small in size and can be bound at a plurality of positions, and there is no possibility that the device is downsized and only one end face of the sheet can be bound as in the conventional case.

In the sheet post-processing device of the image forming apparatus according to the second aspect of the present invention, by providing the jogger table with stippling holes, in addition to the common effects described above, the binding work can be performed from the jogger table side, and the copying machine and the copying machine can be used. There is an effect that it becomes a device capable of binding a plurality of post-processes of sheets sent from a printer or the like in the order of pages even in a small size.

In the sheet post-processing device of the image forming apparatus according to the third aspect, the anvil can be separated from the sheet so that the next sheet can be quickly transferred to the jogger table after the sheet is spliced. The effect is that it can be sent out.

The paper post-processing device of the image forming apparatus according to claim 4 uses the fact that the stapler returns from the retracted position to the original position, and moves the paper to the paper discharge tray, thereby achieving the above-mentioned common effect. In addition, the mechanism for moving the paper can be omitted, and the size of the apparatus can be further reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a basic configuration of a sheet post-processing device of an image forming apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the main part.

FIG. 3 is a side view conceptually showing a sheet aligning operation of the apparatus of FIG.

FIG. 4 is a side view conceptually showing the sheet aligning operation of the apparatus of FIG.

FIG. 5 is a perspective view showing a configuration of a jogger base unit.

FIG. 6 is a perspective view showing an example of a method of moving a jogger fence.

FIG. 7 is a perspective view showing a state in which sheets are bound and pushed out from a stapler.

FIG. 8 is a perspective view showing the basic elements of an apparatus for aligning sheets.

FIG. 9 is a perspective view showing a mechanism of an ejector unit.

FIG. 10 is a side view showing an example of a mechanism of a sensor for detecting the positions of the central upper surface and the rear end upper surface of the paper.

FIG. 11 is a perspective view of the same.

FIG. 12 is a perspective view of the same.

FIG. 13 is a perspective view of a mechanism for moving an alignment roller up and down.

FIG. 14 is a side view of a mechanism for moving up and down a paper discharge tray.

FIG. 15 is a cross-sectional view showing an anvil for bending the tip of a staple needle.

16 is a side view showing a state in which the position of the stapler in FIG. 2 is moved onto the jogger table.

FIG. 17 is a plan view of an example in which a jogger table is provided with a plurality of anvils.

FIG. 18 is a partial cross-sectional view of the same.

FIG. 19 is a perspective view showing an example of a stapler moving device.

FIG. 20 is a side view showing a state where sheets are fed in page order.

FIG. 21 is a side view showing a state in which the movable anvil and the stapler are moved to the surface of the sheet.

FIG. 22 is a partial cross-sectional side view (A) and a plan view of a jogger table provided with a plurality of staple holes.

FIG. 23 is a side view showing the evacuation of the jogger base and stapler and the fall of the paper onto the paper discharge tray.

FIG. 24 is a side view showing the return of the jogger base and stapler to the original position.

FIG. 25 is a side view of an example in which the stapler is movable in the sheet flow direction to reduce the size.

FIG. 26 is a side view showing a state in which the stapler is located on the upstream side in the sheet flow direction in the example of FIG. 24.

FIG. 27 is a front view showing a mechanism for moving or moving the anvil up and down when binding from below the sheets.

FIG. 28 is a plan view of the same.

FIG. 29 is a side view of the same.

FIG. 30 is a front view of a vertical drive gear that moves an anvil up and down.

FIG. 31 is a view showing a structure of a slide shaft of a vertical drive gear that moves an anvil up and down.

FIG. 32 is a front view of a mechanism for moving the anvil up and down.

FIG. 33 is a side view of the same.

FIG. 34 is a perspective view of a mechanism for moving an anvil.

FIG. 35 is a front view of the same.

FIG. 36 is a side view of the same.

FIG. 37 is a front view of the drive device of the needle folding mechanism.

FIG. 38 is a side view of the same.

FIG. 39 is a diagram showing how to fold a staple.

FIG. 40 is a perspective view of a rotation detection mechanism of the shaft of the stapler moving device.

FIG. 41 is a front view of the drive device of the needle folding mechanism.

FIG. 42 is a side view of the same.

FIG. 43 is a plan view showing a state in which a staple is passed through a sheet by a stapler.

FIG. 44 is a plan view showing a state in which a needle passed through a sheet is folded.

FIG. 45 is a plan view of the stapler retracted state after the needle is broken.

[Explanation of symbols]

 1 Paper Top Surface Detection Filler 2 Ejector 3 Jogger Fence 4 Alignment Roller 5 Stippler 6 Paper Ejection Roller Pair 7 Paper 8 Paper Ejection Tray 9 Paper Guide Member Top 10 Paper Guide Member Bottom 11 Jogger Stand 12 Paper Rear Edge Top Surface Detection Member 13 Jogger Moving Pulley 14 Up / down lever 15 Solenoid 16 Link 17 Drive motor 18 Bearing 19 Return spring 20 End fence upper 21, 22 Photo interrupter 23 Paper trailing edge upper surface detection filler 24 Jogger guide shaft 25 Jogger movement timing belt 26 Drive motor 27 Ejector guide shaft 28 Crank rod 29 Crank 30 Drive motor 31 Tray guide 32 Guide roller unit 33 Lower tray movement pulley 34 Tray movement drive pulley 35 Tray movement timing Belt 36 Drive motor 37 Timing belt for deceleration 38 Crunch section 39 Tray end fence 40, 41 Jogger stand guide 42 Moving lever 43 Moving lever shaft 44 Shaft rotating lever 45 Solenoid 46 Link 47 Return spring 48 Step difference 49 Timing belt 50 Stipple needle 51 Transfer Paper 52 Anvil 54 Stepping motor 55 Timing belt 56 Driven pulley 57 Drive pulley 58 Guide shaft 59 Movable anvil 60 Anvil slide base 61 Stipple hole 62 Slide shaft 63 Vertical drive gear 64 Timing belt 66 Paper surface detection switch 67 Paper surface detection pin 68 Anvil vertical drive motor 69 Rotate worm 70 Warm wheel 72 Anvil moving motor 74 Driven pulley 75 Drive pulley -76 Needle folding drive gear 77 Needle folding pushing member 78, 79 Needle folding lever 80 Needle folding rack 81 Needle folding drive motor 83 Worm wheel 84 One-way clutch 86 Spectacle folding 87 Flat hammering 88 External folding 89 Cam shaft 90 Cam 92 Encoder 93 Photointerrupt 94 Notch 95 Rack gear 96 Stipple needle

Claims (4)

[Claims] 1. A sheet ejected from a main body of an image forming apparatus such as a copying machine or a printer is aligned on a jogger table by a stapler and bound as a unit, and then the jogger table is moved and retracted to eject the bound sheet. In a sheet post-processing device of an image forming apparatus that is moved onto a paper tray, at least two anvil portions for folding staple needles for binding the sheets are provided on the jogger table, and the stapler moves to move the anvil portion. A sheet post-processing apparatus for an image forming apparatus, wherein the sheet post-processing apparatus can be selectively used. 2. The image according to claim 1, wherein an escape hole and a staple hole for allowing the stapler to act are provided in a place on the jogger table where the stapler needs to bind the sheets. Paper post-processing device of forming device. 3. A sheet on the jogger table, which comprises an anvil that can be moved when aligning the sheets on the jogger table, and is used for binding the sheets sent in page order from the jogger table side. 3. The sheet post-processing apparatus of the image forming apparatus according to claim 1, wherein the movable anvil is moved in a direction in which the movable anvil is separated from the sheet 7 during the aligning work. 4. When the sheets bound on the jogger table are moved to the sheet ejection tray, the jogger table is retracted from the lower surface side of the sheet and at the same time, the stapler is also retracted, so that the sheet is temporarily retained by the stapler. 4. The image forming apparatus according to claim 1, wherein the sheet is moved to a predetermined position of the paper discharge tray when the stapler returns to its original position when the stapler returns to the original position. Paper post-processing device.