JPH027829B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper take-up cylinder device that receives printed paper in a sheet-fed printing press and delivers it to a paper discharge device.

During printing operations using a sheet-fed printing press, the paper is held in its grip by a gripping claw and is wrapped around the print cylinder as it rotates. The sheet is transferred to the gripping claws of a pair of left and right paper ejection chains and transported to the ejected paper stacking position. In this case, the paper take-up cylinder of the paper take-up cylinder device is provided coaxially between the left and right sprockets, and the paper after being re-held is wound around the circumferential surface of the paper take-up cylinder and rotated. He is then transported. Furthermore, the gripping claws on the paper ejection chain side are mounted in parallel in the axial direction on a claw shaft supported at regular intervals between the paper ejection chains on both sides, and are concentric with the paper collection cylinder. It rotates in a circular pattern to change the grip of paper and transport it.

The above explained about general sheet-fed printing machines,
In recent years, for printing banknotes and securities, inspection rotary printing machines have been developed that print numbers on the paper while inspecting the paper after printing a pattern.This type of printing machine has a paper feeding device and An inspection cylinder for inspecting both sides of the paper is provided between the number printing device and a conveyance chain between the inspection cylinder and the number printing device. A paper pickup cylinder device having the same structure as that in the discharged paper delivery section described above is provided in the paper delivery section between the inspection cylinder and the conveyance chain.

In each conventional paper take-up cylinder device explained above,
Since the running paper ejection chain or conveyance chain is positioned by restricting vertical and horizontal movement only by the chain guide, vertical misregistration may occur due to chain elongation, and the chain and chain may Misregistration in the left and right direction may occur due to play with the guide. Therefore, there is a drawback that the paper may be dropped due to poor gripping or failure to grip the paper.In particular, in the case of inspection rotary printing presses, a paper pick-up cylinder device is installed at the paper delivery point before printing. Therefore, if printing continues while a misregistration occurs, not only will the printing be defective, but if the product is rejected as a fraudulent product, the number will be missing, making subsequent processing extremely troublesome.

The present invention has been made in view of the above points, and is supported between a pair of left and right chains attached to a pair of left and right sprockets on a paper take-up cylinder shaft, and is connected between the paper take-up cylinder and the opposite cylinder. Three rollers parallel to each other in the running direction of the chain are pivotally attached to both ends in the width direction of the gripping pawl device for transfer and reception, and a bearing surface is provided on a roller holder fixed to the paper take-up cylinder shaft side to connect the chain and sprocket. When engaged, the three rollers are supported while restricting movement in the running direction of the chain and the radial direction of the sprocket.
By providing engaging members that engage with each other when the chain and sprocket are engaged to restrict movement of the gripping pawl device in the width direction, the gripping pawl device can be used when changing the grip of paper. The present invention provides a paper take-up cylinder device for a sheet-fed printing press that restricts the movement of paper in each direction and enables delivery of paper while maintaining register accuracy. Embodiments of the present invention will be described in detail below with reference to the drawings.

This embodiment shows an example in which the present invention is implemented in a paper delivery section between an inspection cylinder and a conveyance chain of an inspection rotary printing press. is also a partially cutaway front view, No. 4
The figure is a sectional view of AA in Fig. 3, and Fig. 5 is BB of Fig. 3.
FIG. In the figure, an inspection rotary printing press 1 is composed of a paper feeding device 2, an inspection device 3, a printing device 4, and a paper ejecting device 5. A paper stacking table 8 is provided which automatically rises as the paper is delivered onto the differential plate 7. In addition, the inspection device 3 includes a pair of inspection cylinders 10 that transport the paper 6, which is fed one by one onto the differential plate 7 and held by the swing 9, while being held by the claws on the outer periphery and wrapped around the circumferential surface. , 11 are arranged. Inspection mechanisms 12 and 13 are provided on the circumferential surfaces of the inspection cylinders 10 and 11 to face each other, and are configured to detect irregularities on the front and back sides of the paper 6 and generate signals. .

Between the inspection device 3 and the printing device 4, there is a paper pickup cylinder device 14 (described in detail later) that receives the inspected paper 6 from the inspection cylinder 11, and a paper pickup cylinder device 14 (described in detail later) that has almost the same configuration as this and transfers the paper 6 to the printing device 4. A paper take-up cylinder device 16 for delivering the paper to the paper delivery cylinder 15 is provided. The printing device 4 is provided with a plate cylinder 17 having a plurality of numberers on its outer periphery, and an impression cylinder 18 that is in contact with the plate cylinder 17 and the paper transfer cylinder 15. The ink transferred to the number plate by the inking device 19 is transferred to the paper 6, which is transferred from the claw of the plate to the claw of the impression cylinder 18 and fed between the plate cylinder 17 and the impression cylinder 18, and is numbered. is configured to be applied. Further, between the impression cylinder 18 of the printing device 4 and the paper discharge device 5, a paper take-up cylinder device 20 having substantially the same configuration as that shown in 14 above and a paper discharge chain 21 are provided. paper chain 21
Below the terminal end of the paper-taking cylinder device 20 from the impression cylinder 18
A paper stacking table 22 is provided on which papers 6 are received and conveyed by a paper discharging chain 21, and then released from a paper discharging claw and dropped. Reference numeral 23 is a paper ejection tray, and the paper release position of the paper ejection claw is switched in response to a signal emitted by the inspection mechanisms 12 and 13 when detecting fraudulent paper, so that the fraudulent paper is ejected to this paper ejection tray 23. It is configured as follows.

Therefore, the paper take-up cylinder device 14 will be explained in detail. The paper take-up cylinder device 14 includes a paper take-up cylinder shaft 24 that is supported by left and right machine frames and rotates in synchronization with each cylinder of the printing device 4. A trunk 25 (not shown except in FIG. 1) is pivoted. A sprocket 26 is rotatably attached to both ends of the paper take-up cylinder shaft 24 adjacent to the inside of the machine frame. As the trunk shaft 24 rotates, a conveyor chain 28 that runs in the direction indicated by arrow C in FIG. 1 is stretched. A plurality of brackets 29 are attached to the link plates 28a of the left and right conveyance chains 28, respectively.
are integrally formed at predetermined intervals, and this bracket 29 includes a mounting member 29a, a spectacle-shaped bearing member 29b, and a connecting member 29 that connects them.
It is formed into a U-shape with c. A fixed claw base shaft 30 and a rotatable claw shaft 31 are mounted parallel to each other between the bearing members 29b of the left and right brackets 29 facing each other. teeth,
A torsion coil spring 32 is interposed on the pawl shaft 31 to apply rotational force in one direction. Furthermore, a plurality of nail bases 33 are fixed in parallel to the nail base shaft 30, and a nail 34 that holds the paper 6 between the nail base 33 and the nail base 31 is mounted on the nail base 31. 33, and is always biased in the closing direction by the rotation of the pawl shaft 31 by the torsion coil spring 32.
Reference numeral 35 denotes a mouth changing cam supported on the frame side via a bracket 36, and is connected to the connecting member 29c.
The cam lever 3 is attached to the end of the pawl shaft 31 that protrudes downward.
The pawl 34 is opened and closed by bringing a cam follower 38 provided through the cam follower 7 into contact with the outer circumferential cam surface. The opening and closing positions of the pawl 34 by this cam 35 are determined between the paper taking cylinder 25 and the inspection cylinder 1.
The claw 34 is set to open and close when the claw 34 is located at the contact position with 1.

A boss 29d is provided on the bearing member 29b of the left and right brackets 29 at an intermediate portion between the claw base shaft 30 and the claw shaft 31 and at the link plate 2 of the conveyance chain 28.
A main roller 39 is pivotally attached to the boss 29d. Further, auxiliary rollers 40 and 41 are located at a position shifted forward and backward in phase with respect to the main roller 39 in the running direction of the chain 28, that is, below the pawl base shaft 30 and the pawl shaft 31.
is pivotally attached to the bearing member 29b without providing a boss. On the other hand, a pair of roller holders 42, which are integrally formed with a split-shaped boss 42a and a base plate 42b, are fixed to the paper pick-up cylinder shaft 24 in correspondence with the bearing members of the bracket 29. , three roller receiving plates 43, 44, and 45 are attached with bolts. Of these, the roller receiving plate 43 in the center is
It is formed in a rectangular shape and has a semi-circular receiving surface 46 at its tip that engages with the main roller 39, and
The roller receiving plates 44 and 45 on both sides are provided with gently arcuate receiving surfaces 47 and 48 that engage with the auxiliary roller 40. The entire circumferential length of the circumferential circle around the center of the semicircular arc of the receiving surface 46 is formed to be the same length as the pitch between the adjacent main rollers 39, so that when the teeth of the conveyance chain 28 and the sprocket 26 mesh, they simultaneously move. The main roller 39 and the receiving surface 46 are configured to engage with each other. Further, the receiving surfaces 47 and 48 are connected to the chain 28.
The height is set so that the auxiliary rollers 40, 41 are pressed when the teeth of the sprocket 26 and the sprocket 26 are completely engaged.

Furthermore, a groove lever 49 having a U-shaped groove 49a at its tip is fixed to the center of the paper-receiving drum shaft 24 by split tightening, and is also attached to the claw base shaft 30 and the claw shaft 31. is a tapered claw 51 that engages with the groove 49a.
A pawl lever 51 equipped with a claw lever 51 is fixed to a pawl base shaft 30 with a taper pin 52, and the pawl shaft 31 is rotatably supported on this via a bush 53.

The operation of the paper take-up cylinder device 14 configured as above will be explained. The paper 6 fed from the paper feeder 2 is held in the claws of the inspection cylinders 10 and 11 and is inspected on both sides by inspection mechanisms 12 and 13 while being conveyed in the direction of the arrow. On the other hand, the bracket 29, the pawl stand shaft 30, and the pawl shaft 31 run together with the conveyance chain 28 in the direction of arrow C, and the conveyance chain 28 meshes with the teeth of the sprocket 26 at a position below the paper pick-up cylinder shaft 24 in FIG. start. At this time, the bracket 29 enters from the left side in FIG. 1 where the roller receiving stand 42 rotates in the same phase as the teeth of the sprocket 26 and the receiving surfaces 46, 47, 48 are directed downward. Then, the preceding auxiliary roller 40 first engages with the receiving surface 47, and then the main roller 39 enters through the opening of the receiving surface 46 and engages with the semicircular bottom surface.
The auxiliary roller 41 also engages with the receiving surface 46. At the same time, the groove lever 49 rotates and its groove 49a engages with the pawl lever 51a. At the position directly to the right of the paper pick-up cylinder shaft 24 in FIG. 1, where the teeth of the chain 28 and the sprocket 26 are completely engaged, the three rollers 39, 40,
41 fully engages the receiving surfaces 46, 47, 48. In this case, the main roller 39 does not move in the running direction of the chain 28 because the peripheral surface of the main roller 39 is sandwiched from both sides by the receiving surface 46. Further, the auxiliary rollers 40 and 41 are pushed in the radial direction of the paper take-up drum shaft 24 by the receiving surfaces 47 and 48,
The auxiliary rollers 40, 41 are strongly pressed by the receiving surfaces 47, 48 and do not move in the radial direction, and furthermore, they do not move in the width direction due to the engagement between the pawls 51a and the grooves 49a. As a result, each roller 39, 40, 4
The claw stand shaft 30 and the claw shaft 31 which are integral with the chain 2
Even if there is play between the sprocket 8 and the teeth of the sprocket 26, this prevents the paper from moving and rotates at a constant speed in the width direction on an arcuate trajectory centered on the paper pick-up cylinder shaft 24. . Then, while being firmly held in this way, the claw base shaft 30 and the claw shaft 31 are moved to the inspection cylinder 11.
Since the pawl 34 opens and closes under the action of the grip change cam 35 and changes the grip of the paper 6 between the grip and the pawl base 33, there is no possibility of the paper 6 being gripped incorrectly or erroneously, and the registration accuracy is improved. is ensured.

Thereafter, the gripping pawl device 50 holding the paper 6 in its mouth moves away from the sprocket 26 and moves in a straight line, and the roller holder 42 also moves its receiving surfaces 46, 47, 48, 39, 48 in the reverse order of engagement. 40,41
While smoothly disengaging from the bracket 29, it rotates toward the position where it engages with the next bracket 29 to be connected. The paper 6 conveyed by the conveyance chain 28 is passed to the printing device 4 by the next paper take-up cylinder device 16, where a number is printed, and then passed to the paper discharge chain 21 by the next paper take-up cylinder device 20. After being transported, the paper is dropped and stacked onto the paper stacking table 22.

In this embodiment, the groove 49a is provided on the groove lever 49 side, and the pawl 51a is provided on the pawl lever 51 side.
A claw may be provided on the side and a groove may be provided on the claw lever 51 side. In addition, although this embodiment shows an example in which the present invention is implemented in a paper transfer section from an inspection cylinder of an inspection rotary printing machine,
It can also be implemented in the paper delivery section to the printing device and the paper delivery section from the printing device to the paper discharge chain.
Furthermore, the present invention can be implemented in a paper delivery section of a printing press in which printing units are connected by a chain, or in a paper delivery section of a general sheet-fed rotary printing press.

As is clear from the above explanation, according to the present invention, in the paper take-up cylinder device of a sheet-fed rotary printing press, the gripping pawl device, which is supported between the left and right chains, is provided at both widthwise ends of the gripping pawl device in parallel in the running direction of the chains. Three rollers are pivotally mounted, and a receiving surface is provided on a roller receiving stand fixed to the paper take-up cylinder shaft side, so that when the chain and sprocket are engaged, the three rollers are moved in the running direction of the chain and the radial direction of the sprocket. In addition, the paper pick-up cylinder shaft and each gripping device are provided with engaging members that engage with each other when the chain and sprocket are engaged, so that the gripping claw device can be supported in the width direction of the gripping claw device. By restricting the movement of the paper, even if there is play in the meshing of the chain when changing the grip of paper, the gripping claw device can move in any of the following directions: in the running direction of the chain, in the radial direction of the paper pick-up cylinder, and in the axial direction of the claw shaft. Since the machine does not move in any direction, there is no problem with paper being grasped incorrectly by the claws or paper being dropped due to failure to grasp the paper, reducing the incidence of paper waste and making adjustments after restarting operation troublesome. This eliminates the need for machine stoppages and greatly improves work efficiency. Furthermore, since the registration accuracy in the vertical and horizontal directions is improved, the quality of printed matter is significantly improved.

[Brief explanation of drawings]

1 to 5 show an embodiment of a paper take-up cylinder device for a sheet-fed rotary printing press according to the present invention, FIG. 1 is a schematic side view of an inspection rotary printing press in which this is implemented, and FIG. FIG. 3 is a partially cutaway front view of the pick-up drum device, FIG. 4 is a sectional view along AA of FIG. 3, and FIG. 5 is a sectional view along BB of FIG. 3. 11... Inspection cylinder, 14... Paper take-up cylinder device, 24...
...paper take-up cylinder shaft, 25...paper take-up cylinder, 26...sprocket, 28...chain, 29...bracket,
30... Claw stand shaft, 31... Claw shaft, 39... Main roller, 40, 41... Auxiliary roller, 42... Roller holder, 46, 47, 48... Receiving surface, 49... Groove lever, 49a... Groove, 50... Grip claw device, 51
...Claw lever, 51a...Claw.

Claims (1)

[Claims] 1. A plurality of sets of gripping claw devices 50 each having a claw shaft 31 and a claw base shaft 30 that are parallel to each other are arranged at regular intervals between a pair of left and right chains 28 attached to a sprocket 26 coaxial with the paper take-up cylinder 25. In the paper pick-up cylinder device that supports the gripping claw device and transfers paper between the contact cylinder 11 of the paper pick-up cylinder 25, the paper pick-up cylinder device is located at an intermediate portion between the claw shaft 31 and the claw shaft stand 30. A main roller 39 is pivotally attached to a bracket 29 provided on the link plate 28a of the chain 28, and a pair of auxiliary rollers are pivotally attached to the bracket 29 and are shifted back and forth in the running direction of the chain 28 with respect to the main roller. Roller 4
0,41, the chain 28 and sprocket 2
A receiving surface 46 that supports the main roller 39 while restricting movement in the running direction of the chain when engaged with the sprocket 6, and a receiving surface 46 that supports the auxiliary rollers 40, 41 while restricting movement in the radial direction of the sprocket 26. Side 4
7 and 48 at the rotating ends and a pair of left and right roller holders 42 fixed to the center shaft 24 of the paper take-up cylinder 25, and each of the gripping claw devices 50 and the center shaft 24 of the paper take-up cylinder 25, A paper feeder for a sheet-fed rotary printing press, characterized in that engaging members 49 and 51 are provided that engage with each other when the chain 28 and sprocket 26 are engaged to restrict movement of the gripping pawl device in the axial direction. Torso device.