JPH0739906Y2 - Sheet insertion device for sheet-fed printing press - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to a sheet-fed printing press in which a slip sheet is inserted between the sheets to prevent set-off and the sheet is ejected. The present invention relates to a slip-sheet insertion / ejection device.

<Prior Art> In a sheet-fed printing press, a printing paper conveyed by a delivery device using a chain after printing is finally dropped and stacked on a paper stacking table. In this case, for example, in the case of intaglio printing or the like in which the film thickness of the ink on the printing surface is thick, the ink is difficult to dry, and when loaded as it is, the ink is set off. Therefore, there has been conventionally used a method of inserting a slip sheet between the main sheets when the sheets are discharged on the paper stacking table.

In the sheet-fed printing press, a paper discharge chain is provided so as to circulate between the printing device and the paper discharge device. A plurality of main paper claws and interleaf paper claws are coaxially attached to the paper discharge chain, and the main paper pawls and interleaf paper claws can be opened and closed by a cam mechanism at predetermined positions. On the other hand, the slip-sheet feeding device is composed of a paper feed roller which is driven to rotate, a paper pressing roller and a front pad, and the slip sheet can be conveyed at the same speed as the main paper by a paper discharge chain.

Thus, the printed real paper is conveyed by the paper discharge chain with the real paper nail and the interleaf paper nail held. Then, when it reaches a predetermined position, that is, a slip sheet insertion position, only the slip sheet claw is opened and the slip sheet is supplied, and the slip sheet claw holds the overlapped main sheet and slip sheet. After that, the paper is conveyed by the paper discharge chain onto the paper stacking table and discharged.

<Problems to be Solved by the Invention> In the interleaf insertion / ejection device of the sheet-fed printing press described above, the interleaf sheet and the main paper may be misaligned at the interleaf sheet insertion position. This is because when the paper presser roller is pressed down, the roller shaft is bent and deformed, and the paper presser roller comes into one-sided contact with the slip sheet or slips to cause the slip sheet to meander. This is because the paper cannot be fed. Therefore, the positions of the slip sheet and the main sheet that are held by the slip sheet nails differ for each sheet, and the slip sheet that is released on the paper stack pops out or stops at the front and is stacked properly. There was a problem that it did not exist.

The present invention solves such a problem, and an object of the present invention is to provide an interleaf insertion / ejection device for a sheet-fed printing press, which improves the accuracy of the position at which the interleaf is fed to the main paper.

<Means for Solving the Problems> The interleaf insertion / ejection device of the sheet-fed printing press of the present invention for achieving the above-described object is a nail rest on a nail rest shaft installed between left and right delivery chains. While fixing the claw base, the claw shaft that is installed between the left and right paper discharge chains at a predetermined distance from the claw base shaft rotatably supports the main paper claw and the interleaf claw, and inserts the interleaf position. With the cam mechanism, the sheet-fed printing in which the interleaf sheet is opened and closed by the cam mechanism and the interleaf sheet which is gripped by the main sheet nail and the interleaf sheet inserted at a speed higher than the transport speed of the real sheet are conveyed on the sheet feeding plate. In the interleaf insertion / ejection device of the machine, a paper pad that regulates the front-back position of the interleaf inserted into the claw base is provided, and the intermediary of the arc-shaped first guide surface that guides the main paper to the interleaf insertion position is provided. A paper guide having a second guide surface for sandwiching the paper with the paper feed plate and guiding it to the slip-sheet insertion position. It is characterized by the provision of a code.

<Operation> The printed real paper is carried by the paper ejection chain while being held by the real paper nail and the interleaf paper nail. Then, when it reaches a predetermined position, only the interleaf sheet is released by the cam mechanism, the interleaf sheet is transported on the sheet feeding plate at an insertion speed higher than the transport speed of the main sheet, and is supplied to the opened interleaf sheet nail. . Then, the supplied real paper is guided by the arc-shaped first guide surface of the paper guide, while the supplied interleaving paper is sandwiched between the paper feed plate and the second guide surface of the paper guide and guided to contact the paper pad. The main sheet and the interleaf sheet are positioned at the interleaf sheet insertion position. After that, it is gripped together with the main paper by the interleaf paper claws and conveyed by the paper discharge chain.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 6 is a schematic diagram of the sheet-fed printing press of the present invention.

In the sheet-fed printing press of the present invention, as shown in FIG.
Is a paper feeding device, and supplies the actual paper to the printing machine 12. The printing machine 12 includes a paper transfer cylinder 13, an impression cylinder 14, a plate cylinder 15,
A thickening roller 16 is pivotally supported. An inker 17 is movably supported on the printing machine 12. In addition, the printing machine
A paper discharge device 18 is provided adjacent to 12.

A discharge chain 19 is circulated between the printing machine 12 and the discharge device 18 so as to circulate. As will be described later, the paper ejection chain 19 is provided with a main paper claw 42 for holding the main paper and a paper interleaf claw 43 for holding the interleaf paper. The paper discharge device 18 is provided with a delivery device 21 having a paper stack 20. Further, adjacent to the paper discharge device 18, a slip sheet supply device 22 for supplying slip paper to the paper discharge device 18 is provided.

Thus, the actual paper (printing paper) supplied from the paper feeding device 11 to the printing machine 12 is printed through between the impression cylinder 14 and the plate cylinder 15, and is conveyed to the paper ejection device 18 by the paper ejection chain 19. . On the other hand, the interleaf sheet is supplied from the interleaf sheet feeding device 22 almost in synchronization with the conveyance of the real sheet, and the interleaf sheet claw 42 and the interleaf sheet nail are overlapped with the main sheet.
It is gripped by 43 and conveyed to the paper stack 20.

FIG. 1 is a side view of a sheet inserting and ejecting device of a sheet-fed printing press according to an embodiment of the present invention, FIG. 2 is a partially cutaway bottom view thereof, and FIG.
2 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along line VV in FIG.

As shown in FIG. 1, a pair of left and right paper discharge chains 19 arranged between the printing machine 12 and the paper discharge device 18 are stretched around a pair of left and right sprockets 31, 32 at their respective positions. As shown in FIG. 2, claw rod holders 33 are fixed inside each paper discharge chain 19 at regular intervals in the longitudinal direction. A claw base shaft 35 and a claw shaft 36 forming the claw rod 34 are fixed between the claw rod holders 33. The claw base shaft 35 and the claw shaft 36 are juxtaposed in parallel at a predetermined interval. And the nail stand shaft 35
A fixed cylinder 37 is fixed to the outer periphery of the support shaft 38, while a support cylinder 38 is rotatably fitted to the outer periphery of the pawl shaft 36. Also, the nail stand shaft 35
A connecting plate 39 for restricting the flexure of each shaft is attached between and the claw shaft 36.

The fixed cylinder 37 of the nail holder shaft 35 has a plurality of original nail holders 40 and interleaf nail holders 41.
Are fixed almost alternately in a line at regular intervals. on the other hand,
A plurality of main paper claws 42 and a plurality of interleaf paper claws 43 are arranged in parallel on the support cylinder 38 of the pawl shaft 36 so as to face the main paper claw base 40 and the interleaf paper claw 41, respectively. A cam lever 45, to which a cam follower 44 is pivotally attached at the tip, is fixed to one end of the support cylinder 38.

As shown in FIG. 3, the base of the paper claw 42 is a support cylinder 38.
It is rotatably fitted around the outer periphery of the collar portion 51. A bracket 52 is fixed to the support cylinder 38. And
A spring 53 is stretched between the bracket 52 and the main paper claw 42, and the main paper claw 42 is biased in the clockwise direction in FIG. 3 with respect to the bracket 52 (the claw shaft 36). Furthermore, this paper nail
While the stopper pin 54 is fixed to 42, the bracket 52
A stopper portion 55 is formed on this, and this restricts the rotational position of the paper claw 42 with respect to the bracket 52.

On the other hand, the actual paper nail base 40, which faces the original paper nail 42, is fixed to the fixed cylinder 37, and a gripper plate 46 for holding the original paper between the front end portion of the original paper nail 42 and the front end portion of the original paper nail 42 is fixed. There is.
Usually, as shown in FIG. 3, the main paper claw 42 is urged by the spring 53 so that the tip end thereof is in pressure contact with the holding plate 46 of the main paper claw base 40. At this time, the stopper pin 54 of the paper claw 42 and the stopper portion 55 of the bracket 52 are
There is a slight gap formed between and.

As shown in FIG. 4, the interleaf paper claw 43 has a base 61 fixed to the interleaf paper claw 43 rotatably fitted to the outer periphery of the support cylinder 38. Further, as shown in FIG. 2, a collar 62 is fixed to the support cylinder 38 adjacent to the interleaf paper claw 43. And
A coil spring 63 is provided between the collar 62 and the interleaf paper claw 43.
And the interleaf paper claw 43 is urged in the clockwise direction in FIG. 4 against the collar 62 (the claw shaft 36). In addition, the interleaf paper claw 43
While a stopper 64 is fixed to the bracket, a stopper screw 66 is fixed to a bracket 65 fixed to the support cylinder 38,
Thereby, the interleaf paper claw 43 with respect to the bracket 65 (claw shaft 36)
The rotation position of is regulated.

Further, a cam lever 68 having a cam follower 67 pivotally attached to the tip end thereof is integrally formed with the base portion 61 of the interleaf paper claw 43.

On the other hand, the interleaf paper claw base 41, which is located opposite to the interleaf paper nail 43, is fixed to the fixed tube 37, and the gripper plate 47 for holding the main paper is fixed to the tip end portion of the interleaf paper nail 43. Has been done.
Normally, as shown in FIG. 4, the interleaf paper claw 43 is urged by the coil spray ring 63 so that its tip end is in pressure contact with the holding plate 47 of the interleaf paper pawl base 41. At this time, a slight gap is formed between the stopper 64 of the interleaf paper claw 43 and the stopper pin 66 of the bracket 65.

Further, the interleaf sheet support 41 has a regulating surface 71 which is orthogonal to the pressure contact surface where the interleaf paper nail 43 and the gripper plate 47 are in pressure contact with each other.
72 is fixed by a fixing bolt 73. This paper pad
The tip portion of the 72 has a bifurcated shape and projects downward from both sides of the slip sheet claw 43, thereby preventing contact with the tip portion of the slip sheet claw 43.

Sprocket of the paper ejection chain 19 that conveys the main paper and the interleaving paper
Cams 81 and 82 are arranged near 31, 32, respectively. The cam 81 near the sprocket 31 faces the cam follower 44 fixed to the support cylinder 38 and is fixed to a frame (not shown) of the printing machine 12. On the other hand, a plurality of cams 82 are provided so as to face the cam followers 67 of the interleaf paper claws 43.
It is fixed to a stay 83 that is parallel to the. Also, paper stack
A paper discharge cam 84 is provided above the 20 in the frame so as to face the cam follower 44.

When the cam follower 44 contacts the cam 81 and the paper discharge cam 84, the cam lever 45 moves from the position indicated by the solid line in FIG.
Rotate to the position indicated by the dashed line. Then, this cam lever 45
The support cylinder 38 rotates counterclockwise in FIG. 3 and FIG. 4 via the stopper pin 55, and the stopper portion 55 resists the spring 53 so that the stopper pin 54, that is, the paper claw 42, and the stopper screw 66. Presses the stopper 64, that is, the interleaf paper claw 43, in the same direction against the coil spring 63, so that the claws 42, 4
3 is rotated and released.

When the cam follower 67 contacts the cam 82, the cam lever 68 rotates counterclockwise in FIG. 4 so that only the interleaf paper claw 43 rotates from the position shown by the solid line to the position shown by the chain double-dashed line in FIG. And then released.

As shown in FIGS. 4 and 5, each cam follower is
The cam levers 4 and 44 are brought into contact with the cams 81, 82 and 84, respectively.
The angles θ at which the 5,68 rotate are all set to be the same angle.

As shown in FIG. 1, the interleaf paper feeder 22 includes a paper feed plate 91,
It has a paper feed roller 92, a paper pressing roller 93, and a front pad 94 which are located above and below the paper feed plate 91. The paper feed plate 91 guides the slip sheet 2 to the slip sheet claw 43. The paper feed roller 92 is driven by a drive device (not shown) in the direction of the arrow in FIG.
That is, it can be driven and rotated at a speed higher than the conveying speed of the main paper 1 by the paper discharge chain 19, which is 5 to 30% faster in this embodiment. The paper pressing roller 93 is rotatably supported and can be moved between a pressure contact position with the paper feed roller 92 shown by a solid line in the figure and a separated position shown by a two-dot chain line. The front pad 94 corrects the position of the interleaf sheet 2 in the front-rear direction before feeding the interleaf sheet 2 to the interleaf sheet nail 43.
It is possible to move from 91 to the operating position that protrudes upward and the retracted position that escapes downward.

Further, in FIG. 1, a paper guide 95 which is located on the outer peripheral side of the sprocket 32 and forms an arc is provided above the paper feed plate 91, and the paper guide 95 is gripped by the paper claw 42 and conveyed. An inner peripheral first guide surface 95a for guiding the main sheet 1 and a second outer peripheral tip side second guide surface 95b for guiding the interleaf 2 conveyed on the sheet feeding plate 91 are formed.

The operation of the interleaf insertion / ejection device of the sheet-fed printing press of this embodiment described in detail above will be described.

As shown in FIG. 6, the printed real paper 1 is the real nail of the nail rod 34 opened by the cam 81 near the sprocket 31.
It is supported by being gripped by 42 and the interleaf paper claw 43. Then, the paper sheet 1 that has been gripped is ejected by a paper ejection chain 19 to a paper ejection device 18
Will be transported to. When the main sheet 1 comes to the position just before the slip sheet insertion position, the cam follower 67 of the slip sheet claw 43 is actuated by the cam surface of the cam 82 as shown by the chain double-dashed line in FIG.
Is rotated counterclockwise in FIG. Then, the interleaf paper claw 43 separates from the interleaf paper nail base 41 and opens, and the main paper 1 is released. However, the main paper claw 42 still holds the main paper 1, and the main paper claw 42 holds the main paper 1 and the interleaf paper claw 43.
Is moved to the slip-sheet insertion position by the paper discharge chain 19 in the opened state.

On the other hand, the slip sheet 2 is sent out onto the sheet feeding plate 91 at a predetermined timing, and the front pad 94 positions the front and rear. When the main sheet 1 reaches the interleaf sheet insertion position, the front pad 94 retracts, and at the same time, the paper pressing roller 93, which was at the separated position shown by the two-dot chain line, moves to the solid line position and presses against the paper feed roller 92. The interleaving paper 2 positioned by is sandwiched and sent out. The rotation speed of the paper feed roller 92 is preset to the paper discharge chain 19
Is set to a speed higher than the conveyance speed of the main sheet 1 and the fed slip sheet 2 is inserted between the opened slip sheet claw 43 and the slip sheet claw base 41 as shown in FIG. And its tip comes into contact with the regulation surface 71 of the paper pad 72. Since the paper feed roller 92 continues to feed the slip sheet 2, the slip sheet 2 continues to be in contact with the regulation surface 71 and bulges along the paper guide 95, whereby the slip sheet 2 is positioned with respect to the main sheet 1. It

When the slip sheet claw 43 passes the slip sheet inserting position and the cam follower 67 is disengaged from the cam surface of the cam 82, the slip sheet claw 43 is rotated clockwise by the coil spring 63 in FIG. , Hold the correctly stacked main sheet 1 and slip sheet 2.

The gripped main sheet 1 and slip sheet 2 are conveyed by the sheet ejection chain 19 onto the sheet stacking table 20. Then, the cam follower 44 of the cam lever 45 fixed to the support cylinder 38 is brought into contact with the paper discharge cam 84, and the cam lever 45 is rotated to cause the main paper claw 42 and the interleaf paper claw 43.
The main sheets 1 and the interleaf sheets 2 that have been opened all at once are released and stacked on the paper stacking table 20. After that, the original paper claw 42 and the interleaf paper claw 43 are ejected to the output cam.
After passing through 84 and closing, it moves again to hold the printed book 1 again.

As described above, the paper contact 72 is fixed to the nail base 41 of the interleaf paper claw 43, and the speed of the paper feed roller 92 that sends the interleaf paper 2 to the interleaf paper claw 43 is set to be faster than the transport speed of the main paper 1. When the slip sheet 2 is supplied to the paper claw 43, the front end of the slip sheet 2 has a regulation surface 71 of the paper pad 72.
By abutting against, the correct positioning with respect to the main sheet 1 is made. As a result, the slip sheet 2 absorbs posture errors such as overall conveyance delay and bending, and is always held by the slip sheet claw 43 at a constant position.

The attitude error of the slip sheet 2 increases as the rotational speed of each cylinder of the printing press 12 increases, that is, as the printing speed increases, and the slip sheet inserting and ejecting device of this embodiment is used. Thus, the printing speed can be increased by about 50% as compared with the conventional one, and thus the work efficiency of the printing work can be improved.

In the above-described embodiment, the paper pad 72 is fixed to the interleaf paper claw base 41, but the mounting position of the paper pad 72 is not limited to this, and for example, the paper claw base 40 and the fixed tube 37 are provided separately. It's okay.

<Effects of the Invention> As described above in detail with reference to the embodiments, according to the interleaf insertion / ejection device of the sheet-fed printing press of the present invention, the nail holder is fixed to the nail holder shaft while the nail holder is fixed to the nail holder shaft. The main sheet nail and the interleaf sheet pawl are rotatably supported, and the interleaf sheet tab is opened and closed at the interleaf sheet insertion position to insert the main sheet and the paper feed plate at a speed faster than the transport speed of the main sheet. In the interleaf insertion and ejection device of the sheet-fed printing press that conveys the interleaf and the interleaf, a paper pad that regulates the front-back position of the interleaf inserted in the nail stand is provided, and the main paper is guided to the interleaf insert position. A second guide for sandwiching the interleaf sheet with the arc-shaped first guide surface and the paper feed plate and guiding the interleaf sheet to the interleaf sheet insertion position.
Since the paper guide with the guide surface is provided,
The slip sheet is fed while being guided by the guide surface, while being fed while being guided by being sandwiched between the sheet feeding plate and the second guide surface, and is brought into contact with the paper pad at the slip sheet insertion position to thereby separate the slip sheet and the main sheet. Is correctly positioned, and it is possible to improve the accuracy of the supply position of the slip sheet with respect to the main sheet. Further, as a result, it is possible to properly stack the main paper and the interleaf paper discharged onto the paper stacking table.

[Brief description of drawings]

FIG. 1 is a side view of a sheet inserting and ejecting device of a sheet-fed printing press according to an embodiment of the present invention, FIG. 2 is a partially cutaway bottom view thereof, and FIG.
Fig. 3 is a sectional view taken along line III-III in Fig. 2, Fig. 4 is a sectional view taken along line IV-IV in Fig. 2, Fig. 5 is a sectional view taken along line VV in Fig. 2, and Fig. 6 is sheet-fed printing according to the present invention. It is a schematic block diagram of a machine. In the drawings, 1 is a main sheet, 2 is a slip sheet, 12 is a printing machine, 18 is a sheet ejecting device, 19 is a sheet ejecting chain, 34 is a nail rod, 35 is a nail holder shaft, 36 is a nail shaft, 40 is a nail holder for this paper. , 41 is the interleaf paper claw, 42 is the real paper nail, 43 is the interleaf paper nail, 4
Reference numerals 4 and 67 are cam followers, 45 and 68 are cam levers, 71 is a restricting surface, 72 is a slip sheet contact, 81, 82 and 84 are cams, and 92 is a paper feed roller.

Claims (1)

[Scope of utility model registration request] 1. A claw base is fixed to a claw base shaft installed between the left and right paper discharge chains, and is installed between the left and right paper discharge chains with a predetermined distance from the claw base shaft. The main paper claw and the interleaf claw are rotatably supported on the claw shaft, and the interleaf claw is opened and closed by the cam mechanism at the interleaf insertion position to move the main claw held by the main claw and the paper feed plate from the transport speed of the main sheet. In the interleaf insertion / ejection device of the sheet-fed printing press that conveys the interleaf sheet inserted at a high speed, a paper pad that regulates the front-rear position of the interleaf sheet that is inserted into the nail base is provided. A paper guide having an arc-shaped first guide surface that guides the main paper to the slip-sheet insertion position and a second guide surface that sandwiches the slip-sheet between the paper feed plates and guides the slip-sheet to the slip-sheet insertion position. A sheet insertion and ejection device for a sheet-fed printing press.