JP3056825B2 - Paper bundle processing device control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a sheet bundle processing apparatus for binding or punching holes in a sheet bundle aligned at a predetermined position.

[0002]

2. Description of the Related Art Conventionally, an image forming apparatus such as a copying machine, a printer or the like has a stapler device as stapling means for stapling a sheet bundle which is formed and discharged and aligned at a predetermined position. There is a post- processing device which is a sheet bundle processing device provided with a punching device as a hole making means.

Such a post-processing apparatus generally uses an electric motor as a drive source for driving a stapler apparatus and a punch apparatus, and performs a binding operation and a punching operation by rotating the motor.

[0004]

However, in such a conventional post-processing apparatus, when a hole is punched in a stack of sheets aligned at a predetermined position in a stacked state, a punch of a punch device enters the stack of sheets. When the sheets are stacked, the stacked sheets are slightly misaligned with each other due to the impact, and the holes may be misaligned when the sheets are aligned after the holes have been formed.

Further, when the punch is driven into the bundle of paper, a part of the paper is drawn into the opened hole, and when the punch is removed, burrs or cuts are formed around the hole. In some cases, the drilling work was poorly finished.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is intended to prevent holes from being displaced between sheets when holes are made in a stacked sheet bundle, and to prevent the holes from being displaced around the holes. The purpose of the present invention is to prevent burrs and cuts from being generated.

[0007]

Means for Solving the Problems] The present invention ho vs sheet bundle aligned in order, predetermined locations to achieve the object of the
In a sheet bundle processing apparatus having stapling means for binding with a staple for stapling in a state where the paper bundle is pressed, and perforating means for perforating the sheet bundle, binding operation for the sheet bundle is performed. And drilling work,
The staple unit starts the binding operation and binds the bundle of sheets with staples.
While holding the bundle of paper with the pair of holders
The drilling operation by the drilling means is started and the drilling
An object of the present invention is to provide a sheet bundle processing apparatus control method for releasing the pressure of the sheet bundle by the pair of holders after the operation is completed .

[0008]

[0009]

According to the control method of the sheet bundle processing apparatus, when performing both the binding operation and the perforating operation on the sheet bundle , the stapling means starts the binding operation to stap the sheet bundle.
In a state where the bundle of paper is clamped by a pair of holders.
Since the punching operation by the punching device is started as it is, the punching operation of the punching device is performed in a state where the staples are driven into the sheet bundle by the staple device. The holes are not displaced, and burrs and cuts are not formed around the holes.

[0010]

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for controlling a sheet bundle processing apparatus according to the present invention will be described below with reference to the drawings together with an apparatus for implementing the method. FIG. 1 is a configuration diagram showing an example of a post- processing device which is a sheet bundle processing device to which the sheet bundle processing device control method according to the present invention can be applied, and FIG. 2 is a configuration diagram showing a stapler device of the post-processing device.

A post- processing device which is a sheet bundle processing device includes:
An image is formed and discharged from an image forming apparatus such as a copying machine, and a stapler device 3 as stapling means for binding sheets P stacked and aligned at a predetermined position on a sheet setting table 2 and a bundle thereof And a punching device 4 as a punching means for punching a sheet of paper P are integrally mounted on a unit base plate 5 to form a post-processing unit 1. Thereafter, the processing unit 1 is moved to a sheet setting table by a unit moving means described later. 2 relative to the upper sheet P.

The binding operation of the stapler device 3 and the punching operation of the punch device 4 are performed together by a motor 6 serving as a common drive source, and when the motor 6 is rotated in one direction in the forward direction, the stapler operation is performed. When the device 3 performs the binding operation and is rotated in the opposite direction, the punching device 4
However, the drilling operation is performed independently.

The stapler device 3 includes a unit base plate 5
The fixed side holder 12 is fixed on the upper side by screwing, and a long cam rotation shaft 17 whose right end side extends to the punch device 4 is passed through the fixed side holder 12 in the horizontal direction, and is rotatably supported by a bearing (not shown). I have.

As shown in FIG. 2, the movable holder 10 and the pressing member 14 are rotatably attached to one end of the fixed side holder 12 by pins 13, respectively. The mounting rod 16 fitted in the long hole 15a is fixed, and the elevating rod 15 is mounted to be vertically movable.

The elevating rod 15 has a circular cam engaging portion 15b at the lower end, into which an eccentric cam 18 fixed to a cam rotating shaft 17 is slidably fitted, and as shown in FIG. When the shaft 17 rotates by half, the lifting rod 15
Is set to be the lowest as shown by the imaginary line.

As shown in FIG. 2, the elevating rod 15 has a small diameter portion 15c formed on the upper side and a spring receiver 15d formed on the upper end, and the small diameter portion 15c is formed on the flange portion 14c of the pressing member 14. Is inserted into the guide hole 14b, and a spring 34 having a strong urging force is interposed between the spring receiver 15d and the flange portion 14c, and the urging force constantly urges the pressing member 14 downward.

The stapling needles 8 are housed in the movable holder 10 and are ejected one by one from the movable holder 10 by an extruding member 19 fixed to the tip thereof by the lowering of the pressing member 14. It is received by the needle receiving portion 12a of the fixed side holder 12, and the tip is bent.

In the punching device 4, as shown in FIG. 1, a unit holder 22 is fixed on the unit base plate 5 by screws, and the cam rotation shaft 17 is fixed by a left side surface 22a of the unit holder 22. One end of the bearing 3
It is rotatably supported by 2.

The cam rotating shaft 21 is passed through the unit holder 22 in parallel with the cam rotating shaft 17, and is rotatably supported by a bearing (not shown). A reduction gear 48 is provided at the left end in FIG. And the punch driving eccentric cams 28 and 28 are integrally fixed at the same phase in the rotation direction on portions outside the both side surfaces 22a and 22b of the unit holder 22.

Further, each of the punch driving eccentric cams 28,
28, the circular cam engaging portions 25a formed at the lower ends thereof are slidably fitted into the punch driving cranks 25 shown in FIG.
Each of the punch driving cranks 25 is lowered to the lowermost position when it makes two rotations.

On the upper part of the punch drive crank 25,
A punch unit 24 having a hole 25b formed therein and a punch 27 for punching below the hole 25b, 25b of the punch driving cranks 25, 25 on both sides as shown in FIG.
The small-diameter portions at both ends of the horizontal shaft 26 are respectively fitted and rotatably supported.

At approximately the center in the height direction in the unit holder 22, a die 23 having a U-shape as viewed from the side as shown in FIG. As shown in FIG. 1, screws 11 are fixed to the holes 23a by screwing.

As shown in FIG. 5, the die 23 is formed with a paper insertion groove 7 in the horizontal direction at a substantially central portion in the height direction for inserting a paper to be punched, and is formed in the upper die 23b on the upper side. A punch guide hole 23c is formed in the lower die 23d on the lower side, and a punch receiving hole 23e diverging downward is formed on the lower die 23d. When the punch 27 shown in FIG. The guide is guided to the receiving hole 23e without causing misalignment.

On the other hand, as shown in FIG. 6, the punch unit 24 fixes the horizontal shafts 26, 26, which are solid shafts, right and left on the same axis, perpendicularly to the hollow shaft-shaped punch cover 29, and Holes 29a, 29a are formed at intervals in the longitudinal direction of the punch cover 29.

Then, a punch 27 having an outer diameter capable of being fitted without looseness is provided in the punch cover 29, and screw holes 27a, 27a corresponding to the respective holes 29a of the punch cover 29 are formed in the punch 27, respectively. The punch 27 is fitted into the punch cover 29, and the set screws 31, 31 are respectively fitted into the holes 29a, and the screws 27 are screwed and fixed to the screw holes 27a. Therefore, this punch 2
7 can be attached and exchanged.

In the punch unit 24, as shown in FIG. 4, the horizontal shafts 26 on both sides are formed into long holes whose upper and lower sides are longitudinal sides above both side surfaces 22a and 22b (FIG. 1) of the unit holder 22. Guide holes 22c, 22c formed
The punch 27 can be moved up and down by being guided by the punch 27, and the punch 27 is always fitted only into the punch guide hole 23c of the die 23 or into both the punch guide hole 23c and the punch receiving hole 23e. The positional relationship is set so that

As shown in FIG. 4, the cam rotation shaft 21 and the punch 27 are formed by arranging the center of the cam rotation shaft 21 and the center of the horizontal shaft 26 supporting the punch 27 on the same straight line. The force from the cam rotation shaft 21 is effectively transmitted to the punch 27.

Each of the punch driving cranks 25 on both sides
In order to prevent the paper P from interfering with the paper P when the paper P is inserted into the paper insertion groove 7 of the die 23, the paper P is bent as shown in FIG. Reference numeral 9 in FIG. 1 of the punching device 4 denotes a collection duct for guiding the scraps of the punched sheet to a collection box (not shown).

Next, referring to FIG.
7 drives the stapler device 3 to perform the binding operation, and drives the cam rotation shaft 21 to perform the punching device 4.
A driving force transmitting mechanism for making a hole drilling will be described.

As shown in FIG. 7, the drive system of this post-processing device is driven entirely by a single motor 6 serving as a common drive source, and a drive gear 36 fixed to a rotating shaft of the motor 6.
Is reduced to three speeds by the gears 37, 38, and 39 and transmitted to the final gear 39.

The final gear 39 is rotatably mounted on the cam rotation shaft 17 in both forward and reverse directions.
As shown in FIG. 8, pawls 41 and 42 are arranged on both sides of the cam 9 by fitting them into the cam rotation shaft 17, and one of the pawls 41 is fixed to the cam rotation shaft 17 by fixing bolts 45, and the other is provided. The ratchet wheel 42 is rotatable with respect to the cam rotation shaft 17.

As shown in FIG. 9, the ratchet wheels 41 and 42 are formed with pawl portions 41a and 4
2a are arranged in opposite directions, and each claw portion 41
ratchet pawls 43, 44 at positions where they can be engaged with
Are pivotally attached to both surfaces of the gear 39 by pins 51 and 52, respectively, as shown in FIG.

Therefore, when the gear 39 is rotated in the direction indicated by the arrow A in FIG. 9, the tip of the ratchet pawl 43, which rotates integrally therewith, engages with the pawl portion 41a of the ratchet 41 so that the ratchet 4
1 rotates in the direction of arrow A, and when the gear 39 is rotated in the direction opposite to arrow A, the ratchet pawl 44 on the back side
The hook wheel 42 rotates in the direction opposite to the arrow A by engaging with the claw portion 42a.

As shown in FIG. 8, a small-diameter gear 46 is integrally fixed to the surface of the ratchet wheel 42 opposite to the gear 39, and the small-diameter gear 46 and the ratchet wheel 42 are rotatable about the cam rotation shaft 17. The cam rotation shaft 21 is further inserted into the small-diameter gear 46.
And a reduction gear 48 fixed to one end of the gear.

In this post-processing apparatus, when the motor 6 shown in FIG.
The speed is reduced by the gears 7, 38 and transmitted to the final gear 39, which rotates forward in the direction of arrow A in FIG.

With the forward rotation of the gear 39, the ratchet pawl 43 also integrally rotates in the direction of arrow A, so that the tip of the ratchet pawl 43 engages with the pawl portion 41a of the ratchet wheel 41 to be locked. The gear 39 and the ratchet wheel 41 are integrally rotated in the direction indicated by the arrow A, and the cam rotation shaft 17 integral with the ratchet wheel 41 also rotates in the same direction.

As a result, the cam rotation shaft 17 rotates in the direction of arrow A to rotate the eccentric cam 18 from the position shown in FIG. 2, so that the elevating rod 15 with which the cam engaging portion 15b is engaged moves down. Then, the pressing member 14 descends via the mounting pin 16.

When the pressurizing member 14 is lowered, the movable holder 10 is also moved down together therewith, so that the lower surface of the movable holder 10 is located between the movable holder 10 and the needle receiving portion 12a as shown in FIG. The sheet P is inserted and comes into contact with the upper surface of the bundle of sheets P set at a predetermined staple position.

Further, as the eccentric cam 18 continues to rotate in the direction indicated by the arrow A in FIG.
The spring 34 is compressed after that, and the bundle of sheets P is moved to the movable holder 1.
The needle 8 in the movable holder 10 is punched out by an extruding member 19 of the pressing member 14 which is strongly clamped and held between the first holder 0 and the fixed side holder 12 and then further lowered by the elevating rod 15. The bundle of sheets held is bound by the staples 8.

By the way, when the motor 6 is rotated forward in this way, the gear 39 rotates forward in the direction of arrow A in FIG. 9 and the ratchet wheel 41 rotates in the same direction. The ratchet wheel 42 on the opposite side of the
Is rotated integrally with the gear 39 in the direction indicated by the arrow A.
Since the direction of the claw portion 42a is set so as not to be rotated by the ratchet claw 44 (the direction opposite to the claw portion 41b), only the cam rotation shaft 17 runs idle without rotating the ratchet wheel 42.

Therefore, since the reduction gear 48 meshing with the ratchet wheel 42 via the small-diameter gear 46 shown in FIG. 8 does not rotate, the punch drive eccentric cam 28 for driving the punch device 4 is not rotated.
Since the cam rotation shaft 21 that integrally fixes the punches does not rotate, the punching device 4 does not perform the punching operation (the lowering of the punch 27 in FIG. 1).

Conversely, when the motor 6 shown in FIG.
When the rotational force of the driving gear 36, the gear 3
The gear is transmitted to the final gear 39 via the gears 7 and 38, and the gear 39 reversely rotates in the direction opposite to the arrow A in FIG.

By the reverse rotation of the gear 39, the ratchet pawl 44 also integrally reversely rotates in the direction opposite to the arrow A, and the tip of the ratchet pawl 44 is engaged with the pawl portion 42a of the ratchet wheel 42, and 39 and the ratchet wheel 42 are integrally rotated so as to rotate in the direction opposite to the arrow A, and FIG.
7 rotates in the same direction, and the reduction gear 48 rotates in the direction of arrow B in FIG.

Therefore, the punch drive eccentric cam 28 starts to rotate by the rotation of the cam rotation shaft 21 integral with the reduction gear 48.
8 is set in the paper insertion groove 7 because the punch 27 rotates in the direction of arrow C from the position where the punch 27 shown in FIG. 4 is most raised, whereby the punch drive crank 25 descends and pushes the punch 27 down. The bundle of sheets P is punched out, and a hole is formed at a target position.

When the motor 6 (FIG. 7) for punching operation of the punch device 4 rotates in the reverse direction, the stapler 41 is on the idling side opposite to the normal rotation for the stapler device 3 to perform the binding operation. No action is taken.

That is, when the motor 6 rotates in the reverse direction, the gear 39 rotates in the direction opposite to the direction indicated by the arrow A in FIG. 9 and the ratchet pawl 43 also rotates integrally therewith in the same direction. Since the ratchet pawl 43 does not engage the pawl portion 41b with the ratchet pawl 43, the gear 39 is idle with respect to the cam rotation shaft 17, and the ratchet wheel 41 is not rotated together with the cam rotation shaft 17.

Accordingly, the eccentric cam 18 for binding the stapler device 3 integral with the cam rotation shaft 17 is provided.
2 does not rotate from the position shown in FIG. 2, so that the stapler device 3 does not perform the binding operation.

As described above, in the post-processing apparatus according to this embodiment, both the binding operation and the punching operation are performed by the same motor 6, and the stapler device 3 binds when the motor 6 is rotated in one direction (forward rotation). When the punch device 4 is operated and rotated in the opposite direction, the punch device 4 performs a punching operation.

FIG. 10 is a schematic structural view showing a unit moving mechanism for moving the stapler device and the punch device relative to the sheet in a unit state together with the unit. FIG.
Stapler device 3 and punch device 4 described in
The unit can be moved in the direction indicated by the arrow E in FIG. 10 along the edge of the sheet P set on the sheet setting table 2 in a unit state by the unit moving mechanism 50.

The unit moving mechanism 50 connects the stapler device 3 and the punch device 4 to the unit case 57 on two guide rods 55 and 56 fixed in parallel between the fixing portions 53 and 54 on both sides of the post-processing device. This is a mechanism for holding the post-processing unit 1 movably in the direction indicated by the arrow E in FIG.

A drive belt 61 for moving the post-processing unit 1 is provided between the guide rods 55 and 56.
A drive pulley 62 is provided in parallel with the guide rods, and a drive belt 61 of the drive pulley 62 is integrally mounted on a rotation shaft of a stepping motor 62 fixed to the fixed portion 53 in proximity to the fixed portion 53, and a pulley 63 is rotatably mounted on the fixed portion 54. And between them.

Then, the unit case 57 of the post-processing unit 1 is mounted on a part of the drive belt 61 by the mounting member 64, and when the stepping motor 62 is rotated in both forward and reverse directions, the post-processing unit 1
5 and 56, the sheet bundle set on the sheet setting table 2 can be bound at a desired position on the sheet set table 2 by the stapler device 3 or can be punched by the punch device 4. Like that.

As described above, when the stapler device 3 and the punch device 4 are formed in an integral unit and can be relatively moved with respect to the sheet P by the unit moving mechanism 50, the punch 27 of the punch device 4 Since the position of the punching device 4 can be moved in a unit state even if only one (see FIG. 1 or FIG. 4) is provided, a plurality of punch holes can be moved along the direction indicated by the arrow E in FIG. It can be easily opened at the right position.

Therefore, when a single punch is used in this way, the punching force for punching a sheet is reduced by half as compared with a punch device having two punches.

When performing both the binding operation and the perforating operation on the sheet bundle, the post-processing apparatus uses the punching device 4 between the time when the stapler device 3 starts the binding operation and the time when the stapling operation is completed. The punch 27 is used to make a hole in the sheet bundle, and the punching 27 is controlled so as to complete the entire hole punching operation until the punch 27 is pulled out of the sheet bundle.

That is, when a command for performing both the binding operation and the punching operation is issued, first, as shown in FIG. 11, the eccentric cam 18 is rotated to start the forward rotation of the motor 6, whereby the binding operation described above is performed. Is performed, and the rotation is stopped at the position where the staple is rotated by １ ／ (the stapling needle is bent to complete the binding).

In this state, since the lifting rod 15 is at the lowest position as shown by the phantom line in FIG. 3, the sheet bundle is moved to the movable holder 10 and the fixed holder 12 shown in FIG.
And the pressure is narrowed in the meantime.

At this time, the motor 6
Starts reverse rotation, the punch driving eccentric cam 28 starts rotating, and because it rotates once, the punch 27 shown in FIG. 4 of the punching device 4 described above descends to make a hole in the sheet bundle, and thereafter, Then, it is pulled out of the sheet bundle and the punching operation is completed.

In accordance with the timing of the end of the drilling operation, the motor 6 rotates forward again as shown in FIG. 11, so that the eccentric cam 18 of the stapler device 3 rotates again by が and the lifting rod 15 rises. Return to the initial position (home position) and stop.

[0061] By the above operation order, the state in which it sheet bundle is stapled by the needle for stapling is 挾圧 by fixed side holder 12 and the movable holder 10 (both shown in FIG. 2), that is, the stapler 3 Since control is performed such that the entire punching operation by the punching device 4 is performed from the start of the binding operation to the completion thereof, the sheet is displaced at the time of punching, causing a deviation in the hole, or the vicinity of the hole. Burrs and cuts do not occur.

This series of controls includes a central processing unit (CPU) having various judgment and processing functions, a ROM as a program memory storing various programs and fixed data, a RAM as a data memory, This can be performed by using a microcomputer including an output circuit (I / O).

Further, the timing of performing the binding operation and the punching operation is not limited to the timing shown in FIG. 11, and the timing of the punching device 4 from the start of the binding operation of the stapler device 3 to the completion of the binding operation. As long as the punching operation is started and at least a part of the operation period of the stapler device 3 and the punching device 4 is overlapped, the above-described displacement of the holes and the occurrence of burrs and cuts around the holes are prevented. Can be.

[0064]

As described above, according to the present invention ,
According to the paper bundle processing device control method, when performing both the binding operation and the punching operation on the paper bundle, the binding operation is performed.
Since the punching operation is started at the stage when the paper is stapled and the paper is bound, it is possible to prevent the paper from scattering at the time of the punching operation by the punching means and to prevent the paper from being drawn into the hole by the punch. It is possible to eliminate burrs and cuts which are easily formed around the gap between the holes and the perforated paper.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an example of a post-processing device to which a post-processing device control method of an image forming apparatus according to the present invention can be applied.

FIG. 2 is a configuration diagram showing a stapler apparatus of the post-processing apparatus.

FIG. 3 is an explanatory diagram for explaining a vertical movement of a vertical rod 15 of the stapler device 3 of FIG. 2;

4 is a configuration diagram showing a punch device 4 provided in the post-processing device of FIG.

FIG. 5 is a perspective view showing a die 23 of the punch device 4;

FIG. 6 also shows a punch unit 24 of the punch device 4.
FIG.

FIG. 7 is a perspective view showing a driving force transmission mechanism for driving both a stapler device and a punch device of the post-processing device of FIG. 1;

FIG. 8 is an enlarged front view showing a main part of a drive system for driving both the stapler device and the punch device.

FIG. 9 is a schematic diagram for explaining positions and directions of ratchet wheels and ratchet pawls provided on both sides of a gear 39 in FIG. 7;

FIG. 10 is a schematic configuration diagram showing a unit moving mechanism that moves the stapler device and the punch device of FIG. 1 relative to a sheet in a unit state together with the unit.

11 is a timing chart showing operation timings of a binding operation and a punching operation that are controlled when both the binding operation and the punching operation are performed by the post-processing device in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Post-processing unit 2 Paper set table 3 Stapler device (staple means) 4 Punch device (perforation means) 6 Motor 10 Movable holder 12 Fixed side holder 17, 21
Cam rotation shaft 18 Eccentric cam 23 Die 27 Punch 28 Punch drive eccentric cam P Paper

Claims (1)

(57) [Claims] 1. A ho pair sheet bundle aligned in a predetermined position
In a sheet bundle processing apparatus provided with stapling means for binding with a staple for stapling in a state where the paper bundle is clamped, and perforating means for perforating the sheet bundle, an operation of binding to the sheet bundle is performed. When performing both the hole punching operation and the hole punching operation, the stapling means starts the binding operation, binds the sheet bundle with the staple, and transfers the sheet bundle to the pair of holders.
The drilling operation by the drilling means is started while the pinch is further pressed, and after the drilling operation is completed, the pair of holders is started.
Paper, characterized in that to release the挾圧of the sheet bundle by
A method for controlling a bundle processing device.