KR100405838B1 - Booklet finisher of the image forming apparatus - Google Patents

Abstract

The present invention relates to a bookbinding apparatus installed in an image forming apparatus such as a printer, a copying machine, a printing press, and the like; It aims to provide.

In order to achieve the above object, the bookbinding positioning device 88 of the present invention includes a jogger 61 configured to be movable by sliding means, and a paper grip means 33 configured in the jogger. The grip means consists of a grip plate 30 having a cam means, a return spring 31 and a paper grip portion 30b, the grip plate being pushed up to an upper position by the rotation of the cam means, The lowering of the grip plate is performed by the self-load of the grip plate and the return spring 31, and is configured to grip and support the paper between the paper grip portion 30b and the jogger 61 of the lowered grip plate.

Description

Booklet finisher of the image forming apparatus

The present invention relates to a bookbinding apparatus which is installed in an image forming apparatus such as a printer, a copying machine, a printing machine, and then aligns and discharges the paper to be discharged. It is to provide a bookbinding apparatus capable of.

A bookbinding apparatus of a conventional copier is disclosed in US Patent No. 6,004,254 as one example.

Prior to the description of the present invention, a conventional copier structure and a bookbinding device structure constituted by the copier will be described with reference to FIG.

In Fig. 1, reference numeral 1 denotes a copying machine, and 2 denotes a bookbinding apparatus.

In general, the bookbinding apparatus 2 receives the finished paper from the copier under the control of the inlet flap 3 and immediately discharges the sheet to the stack tray 7, or the stapler unit (Stapler head: 18, Stapler Enville: 19). ), The folding rollers (26) (27), the bookbinding position setting device (23), etc. are bound to be discharged to the discharge tray 35 after binding the paper.

The process of binding the sheet conveyed from the copier main body 1 will be described in more detail below.

First, the paper discharged from the copier main body 1 passes through the rollers 4 and 4 provided at the paper discharge port of the copier main body, and enters the paper moving guides 11 and 12 of the bookbinding apparatus. The paper entered into the paper moving guide enters between the stapler head 18 and the stapler-enville 19 through the discharge rollers 13 and 14, and then the end of the paper is placed in the bookbinding positioning device 23. Aligned to the base 6.

The sheet aligned with the bookbinding positioning device is supported between the upper half moon roller 17 and the lower half moon roller 9 for bookbinding such as stapling or folding.

The upper half moon rollers 17 and the lower moon rollers 9 are provided with leaf springs 5a and 5b, respectively, so that the paper does not flow downward by the elastic force while supporting the paper.

The upper half moon roller 17 and the lower half moon roller 9 are in close contact with each of the leaf springs when the sheet is aligned with the bookbinding positioning device 23, thus preventing the movement and entry of the paper. It is configured in an eccentric cam shape so as not to interfere.

That is, when the sheet is conveyed so that the end of the sheet is aligned with the base 6 of the bookbinding positioning device 23 for bookbinding, the flat portions of the upper and lower vandal rollers 17, 9 are plate springs 5a, Face each other (5b) so that a space is formed between the leaf spring and the vandal rollers so as not to disturb the entry of the paper, and the entered paper is stabbed using the stapler head 18 and the stapler enville 19. When flling, the upper and lower vandal rollers are rotated so that the curved surface of the vandal rollers is in close contact with each of the leaf springs so that the paper is supported therebetween.

The central portion of the paper supported between the vandal rollers 9 and 17 and the leaf springs 5a and 5b is stapled by the stapler head 18 and the stapler enville 19. Then, the upper and lower vandal rollers 17, 9 supporting the sheet are simultaneously moved so that the stapled portion of the sheet is located at the center of the folding rollers 26, 27.

In this state, the portion of the paper stapled by the knife 25a provided in the protruding unit 25 is pushed toward the folding rollers 26 and 27. When the stapled portion is in contact with the folding roller, the sheet is folded in half by the action of the folding rollers which rotate in reverse direction, and the bookbinding is completed, and the binding paper passing through the folding rollers 26 and 27 is discharge tray 35. To be discharged.

On the other hand, the exchange flap 15, 16 provided in the lower portion of the discharge roller 13, 14 is guided so that the paper passing through the discharge roller is aligned to the bookbinding positioning device 23 in the page order or discharge order And the bookbinding position setting device 23 is configured to be movable in the direction of the arrow a in accordance with the signal of the paper position detecting means 63 (paper position detecting sensor).

When the paper position detecting means detects a signal for binding a small size paper, the bookbinding positioning device 23 moves to the small size paper binding position in accordance with the detection signal, and the paper position detecting means has a large size paper. When detecting a signal for binding, the bookbinding position setting device 23 moves to a large size paper binding position in accordance with the signal.

The bookbinding apparatus of the conventional copying machine configured as described above moves the bookbinding positioning apparatus 23 in advance so as to be aligned with the position of the stapler center in order to staple the central portion of the paper, and then waits for the base of the bookbinding positioning apparatus. 6) After the end of the sheet is aligned, the center portion of the sheet is stapled by a stapler unit (Stapler head 18, Staple Enville: 19). Subsequently, in order to fold the stapled position, the upper and lower half moon rollers 17 and 9 should be used to move the center portion of the sheet to the tangential position of the folding rollers 26 and 27.

As described above, the structure for supporting and moving the sheet is supported by the elasticity of the leaf springs 5a and 5b opposite to the upper and lower vandal rollers 17 and 9 so that the number of sheets to be bound is supported. As more and less, that is, depending on the thickness of the paper stack to be bound, there is a deviation in the reliability of supporting the paper.

In addition, in the transfer of bookbinding paper having a large number of sheets, only the frictional force between the upper and lower half moon rollers and the paper is moved, so that the paper in the middle where the upper and lower half moon rollers are not in contact can be surely moved. There is no structural problem.

In addition, there is a disadvantage in that the transfer path of the paper is not smooth as the structure of FIG. 1 is curved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to construct a grip of a tong type rather than a vandal roller so as to stably and accurately support and bind a paper, thereby greatly improving the reliability of the bookbinding apparatus. .

2, 6 and 7, the bookbinding apparatus of the present invention, when the paper discharged from the copier main body enters between the paper moving guides 81 and 82, the upper roller 86 and the lower roller 85. Rotates to discharge the paper, and the paper is stacked on the paper stack guide 83.

Before entering the paper, the bookbinding positioning device 88 is configured to move to the position for aligning the paper so that the center of the paper can be aligned in accordance with the stapler unit 84, and after the paper is aligned, the stapling operation is completed. do.

After the stapling operation is completed, the grip means installed in the bookbinding positioning device 88 reliably grips the paper to move the paper between the folding rollers 89 and 91, and the protruding unit knife configured in the protruding unit 87 An operation 87a is configured to complete folding of the paper as the paper is pushed into the folding roller to enter the paper.

In particular, the grip means 33 is installed in the center of the jogger 61 is configured to be slidable in the vertical direction along the sliding shaft 32, the jogger is jogging movement left and right timing belt installed in the jogger moving frame 60 It is connected to (94) is configured to reciprocate the jogger moving frame.

In addition, the stack guide 21 is fixed to the jogger moving frame in contact with the loaded paper, and a slit groove is formed at the center of the stack guide so that the grip plate 30 of the grip unit protrudes and slides as the jogger moves. (8) is comprised.

The grip means configured to move the grip plate along the surface of the stack guide part includes a worm gear 22 and a worm wheel 24 connected to the grip motor 10, and a cam 20 rotated by the worm gear and the worm wheel. It consists of a grip plate 30 that moves in the vertical direction in accordance with the rotation of the cam. The grip plate is coupled to the cam so as to be movable in the vertical direction of the stack guide surface in the vertical direction, the grip plate is interposed between the return spring 31 so as to naturally fall to its own load according to the rotational position of the cam It is configured to connect with the jogger 61.

1 is an exemplary view for explaining the structure of a bookbinding apparatus of a conventional copier,

2 is an exemplary view for schematically explaining a structure of a bookbinding apparatus of a copying machine of the present invention,

3 is a perspective view of a main portion of the bookbinding apparatus of the copying machine of the present invention seen from above,

4 is a perspective view of a main portion of the bookbinding apparatus of FIG. 3 as viewed from below;

5 is an enlarged perspective view of a main part of the grip unit of the bookbinding apparatus of the present invention, as viewed from below;

Figure 6 is a perspective view of the main portion viewed from the top after removing the stack guide in the grip portion of the present invention,

7 is a cross-sectional view for explaining the structure of the bookbinding apparatus of the present invention.

8A to 8C are views for explaining the driving process of the grip means of the bookbinding apparatus of the present invention;

9 is an exploded perspective view for explaining the grip plate and the cam structure of the present invention.

* Description of the symbols for the main parts of the drawings *

1-Copier 2-Booklet Maker

3-Entrance flap 4-Roller

5a, 5b-leaf spring 6-base

7-stack tray

8-Slit groove 9-Lower half moon roller

10-Grip Motor 11, 12, 81, 82- Paper Movement Guide

13,14-Discharge Roller 15,16-Exchange Flap

17-Upper Vandal Roller 18-Stapler Head

19-Stapler-en-Ville

20-cam 20a-protruding pin

21-Stack Guide 22-Worm Gear

23-worm wheel shaft 24-worm wheel

23, 88-bookbinding positioning device

25, 87 -Extrusion Unit 25a, 87a-Extrusion Unit Knife

26, 27, 89, 91-folding roller 30-grip plate

30a-guide groove 30b-paper grip

30c-Curved Groove 30d-Return Spring Fixture

31-return spring 32-sliding shaft

33-Grip Means 35, 132-Output Tray

41-Paddle 42-Paddle Motor

43-Paddle Drive Timing Belt 44-Paddle Shaft

51-Fixed Clip 52,63-Paper Position Sensor

53-Jogger Move Pulley 60-Jogger Move Frame

61-Jogger 61a-Jogger Support Plate

61b-Grip Plate Moving Guide

70-jogger moving motor 80-jogger motor pulley

83-Entrance stack guide 84-Stapler unit

85-Upper roller 86-Lower roller

90-Jogger belt 94-Left and right timing belt for jogger movement

95-Jogger Move Pulley

The bookbinding apparatus of the image forming apparatus of the present invention includes a bookbinding position setting device 88 which receives paper from the main body and supports the paper in a predetermined bundle unit and moves the bookbinding position to a position to be bound,

The bookbinding positioning device includes a jogger 61 configured to be movable by sliding means and a paper grip means 33 configured on the jogger, wherein the grip means comprises a cam means and a return spring 31. And a grip plate 30 having a paper grip part 30b, the grip plate being pushed up to an upper position by the rotation of the cam means, and the lowering of the grip plate causes the self load and return of the grip plate. It is made by a spring, characterized in that configured to grip and support the paper between the paper grip portion (30b) and the jogger 61 of the lowered grip plate.

In addition, a stack guide 21 for covering the jogger is further configured, and a slit groove 8 is formed at the center of the stack guide, and a part of the grip plate 30 and a paper grip part are formed through the slit groove. 30b) is protruded, and the protruding grip plate is simultaneously movable in the moving direction of the jogger according to the movement of the jogger, and is configured to grip the paper between the stack guide and the paper grip part of the grip plate.

In addition, the sliding means of the jogger is configured to be fitted to the two sliding shafts 32 so that the jogger can slide in the vertical direction,

In addition, the jogger is fixed to the jogger movement left and right timing belt 43 installed in the jogger movement frame 60, and is slid up and down by the jogger movement left and right timing belt.

In particular, the cam means includes a worm gear 22 for rotating the worm wheel shaft 23, a cam 20 fixed to the worm wheel shaft, and a cam surface at a position away from a central axis of the worm wheel shaft. Consists of a protruding pin (20a) protruding in the configuration, the protruding pin is configured to push up the grip plate according to the rotational position of the cam.

The center portion of the grip plate penetrates into a curved shape having a predetermined step, and the protruding pin is in contact with the stepped portion of the curved part to push up the grip plate.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to FIGS. 2 to 9.

The bookbinding apparatus of the present invention is used in combination with an image processing apparatus such as a copying machine as shown in FIG. 2, and the paper discharged from the copying machine is a paper moving guide 81, 82, an upper roller 86, and a lower roller 85. The paper is moved to the entrance stack guide 83 through it.

A soft paddle 41 is formed at the bottom of the inlet stack guide to smoothly move the paper moved to the inlet stack guide, and the paddle rotates along the paddle shaft 44 to align and move the paper. The paddle shaft is rotated by the paddle motor 42 via the paddle driving timing belt 43.

The paper passing through the paddle passes through the stapler unit 84, which is installed for bookbinding, and the folding rollers 89 and 91, and the end of the paper is supported by the grip plate 30 of the bookbinding positioning device 88. do.

When the predetermined number of sheets is loaded, the grip plate 30 descends and grips firmly so as not to disturb the loaded paper. The gripped paper is moved to the position to be stapled by the operation of the bookbinding position setting device, and then stapled using the stapler unit 84 at that position, and then moved to the folder roller again to move the stapled paper position to the protruding unit. Pushed by the protruding unit knife 87a of 87, it is moved toward the folding rollers 89 and 91 so that the sheet is folded in half.

In the process of pushing the paper toward the folding rollers 89 and 91 with the knife, the grip plate 30, that is, the bookbinding positioning device 88, is moved at an appropriate speed so that the paper does not slip from the contact position of the knife. Should give.

When the paper is pushed into the folding rollers 89 and 91, the paper is folded in half by the action of the folding rollers which rotate in reverse direction, and the bookbinding is completed, and the bookbinding paper passed through the folding rollers 89 and 91. Is discharged to the discharge tray 135.

The present invention relates to the structure of the bookbinding positioning device 88 to firmly grip the paper to facilitate the staple and folding operation, the bookbinding positioning device is a grip plate like the structure of Figs. A sliding shaft 32 capable of slidingly moving the jogger 61 provided with 30 in the vertical direction (the moving direction of the paper) is provided. In addition, a jogger movement frame 60 is configured parallel to the sliding shaft 32, and the jogger movement frame is provided with a left and right timing belt 94 for jogging movement in the direction of the sling guiding shaft 32, and for the jogger movement. The left and right timing belts 94 are fixed to the jogger 61 via the fixing clip 51.

The jogger movement left and right timing belt 94 is moved by receiving the rotational force of the jogger belt 90 sandwiched between the jogger movement pulley 95 and the jogger motor pulley 80. The jogger moving motor 70 connected to the shaft of the jogger motor pulley 80 is a motor capable of forward and reverse rotation and controlled by a controller of a bookbinding apparatus (not shown) to reciprocate the jogger movement left and right timing belts 94. do.

In the central part of the jogger, the grip means 33 is characterized by the present invention.

The grip means includes a worm wheel 24 fixed to the worm wheel shaft 23, a worm gear 22 for rotating the worm wheel, a cam 20 fixed to an end of the worm wheel shaft, and a rotation of the cam. The grip plate 30 is installed so as to be movable up and down, the return spring 31 is fixed to the grip plate and the like. The worm gear 22 is driven by the grip motor 10.

A protruding pin 20a is installed on an outer circumference of the cam, and the grip plate moves upward and downward by the protruding pin.

The grip plate 30 is provided with a guide groove 30a to be fitted into the guide 61b of the support plate 61a installed in the jogger 61, and moves up and down along the guide 61b.

In addition, the upper part of the grip plate 30, the paper grip portion 30b is configured to be perpendicular to the grip plate to face the base surface of the jogger 61, the curved surface of the grip plate (30c) ) Is configured.

The curved groove 30c of the grip plate is configured to push up the grip plate only at the position where the protruding pin 20a rises by the rotation of the cam, and when the protruding pin descends by the rotation of the cam, the grip plate itself It is configured to be able to fall downward under load. The grip plate acts to naturally grip the loaded paper moved in the sliding direction of the jogger 61, and at the same time, a return spring 31 is installed to maintain the grip state.

The return spring is fixed to the body of the spring fixing portion 30d of the grip plate and the jogger 61.

3 and 6 to 9 will be described in more detail with respect to the operation and structure of the grip means 33 of the present invention.

FIG. 8A shows a state where the grip plate 30 constituting the grip means 33 of the present invention is in a state in which the grip plate 30 falls under its own load, that is, the paper grip part 30b which is spoken on the upper part of the grip plate as shown in the plan view of FIG. 3. ) Is lowered toward the surface of the stack guide 21 installed on the jogger to indicate a state in which the paper can be gripped.

Thus, the grip of the paper is made between the paper grip portion 30b and the surface of the stack guide 21.

In the state where the paper grip part 30b grips the paper, the grip motor 10 is positioned so that the protruding pin 20a provided on the outer circumferential surface of the cam 20 is not caught by the stepped portion formed in the curved groove 30c of the grip plate. The cam 20 should be rotated by driving.

In order to release the grip state of the paper after finishing the post-processing process, that is, the bookbinding process by moving the bookbinding positioning device in the state where the paper is gripped, as shown in FIG. The protruding pin 20a lifts the stepped portion formed in the grip plate curved groove 30c. The grip plate lifted by the cam starts to move along the guide 61b provided on the support plate 61a of the jogger.

8C shows a state in which the grip plate 30 is raised to the maximum by the driving of the cam 20, and when the cam 20 is further rotated in this state, the protruding pin 20a is separated from the stepped portion of the curved groove to grip the plate. 30 falls back to the state of FIG. 8A.

Therefore, in the process of loading paper into the stack guide 21 of the bookbinding positioning device 88, the structure of FIG. 8C, that is, the grip plate 30 is lifted up, and in the post-processing process of FIG. 8A That is, the grip plate 30 is controlled to fall in the state that the paper is loaded on the stack guide 21 is dropped.

On the other hand, the paper position detection sensor 52 provided near the grip plate detects the position of the paper and moves the position of the bookbinding position setting device according to the size of the paper to be bound.

The present invention makes the paper more stable by constituting the grip means 33 driven by the worm gear and the cam, instead of the roller and the leaf spring having unstable support. The effect that can be supported is obtained.

In addition, since the grip plate 30 is driven using the worm gear 22 and the worm wheel 24 connected to the grip motor 10, the reverse rotation of the worm wheel can be prevented so that the grip plate can grip the paper. Since it is possible to keep the position of the grip plate in the stationary state in the previous state, the effect of improving the reliability of the device is obtained.

Claims (6)

And a bookbinding position setting device 88 which receives the paper and moves the paper to a position to be bound by supporting the paper in a predetermined bundle unit, The bookbinding positioning device includes a jogger 61 configured to be movable by sliding means and a paper grip means 33 configured on the jogger, wherein the grip means comprises a cam means and a return spring 31. And a grip plate 30 having a paper grip part 30b, the grip plate being pushed up to an upper position by the rotation of the cam means, and the lowering of the grip plate causes the self load and return of the grip plate. And a spring (31), configured to grip and support a sheet of paper between the paper grip portion (30b) of the lowered grip plate and the jogger (61). The method of claim 1, A stack guide 21 covering the jogger 61 is further configured, and a slit groove 8 is formed at the center of the stack guide, and a part of the grip plate and a paper grip part 30b are formed through the slit groove. Is protruded, and the protruding grip plate and the paper grip part can be simultaneously moved in the moving direction of the jogger according to the movement of the jogger, wherein the paper is configured to grip between the stack guide and the paper grip part of the grip plate. A bookbinding apparatus of an image forming apparatus. The method of claim 1, The jogging device of the image forming apparatus, characterized in that the sliding means of the jogger is fitted to two sliding shafts (32) so that the jogger can slide in the vertical direction. The method of claim 1, The jogger is fixed to the jogger movement left and right timing belt (94) installed in the jogger movement frame (60), the bookbinding apparatus of the image forming apparatus, characterized in that sliding up and down by the jogger movement left and right timing belt. The method of claim 1, The cam means protrudes on the worm gear 22 for rotating the worm wheel shaft 23, the cam 20 fixed to the worm wheel shaft, and the cam surface at a distance away from the central axis of the worm wheel shaft. And a protrusion pin (20a), wherein the protrusion pin is configured to push up the grip plate according to the rotational position of the cam. The method of claim 5, An image forming apparatus, wherein a predetermined curved groove 30c having a stepped portion is formed at a central portion of the grip plate, and the protruding pin 20a contacts the stepped portion of the curved groove to drive the grip plate. Binding device.