JPH0742723Y2 - Paper transport device for sheet-fed rotary printing press - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a sheet-fed rotary printing press, in which a gripper device that circulates along the outer periphery of the cylinder by the rotation of the cylinder conveys the changed paper from the other cylinder. The present invention relates to a paper transport device.

[Conventional technology]

In the sheet-fed rotary printing press, the paper printed by the printing cylinder of the printing unit is conveyed by the paper ejection chain, and is ejected and stacked on the paper stack plate of the paper ejection device. In the paper delivery section from the printing unit to the paper ejection chain, a sprocket with the paper ejection chain attached coaxially with the paper take-up cylinder is provided in contact with the impression cylinder of the printing unit. When gripping the paper from the gripper device (hereinafter referred to as the nail) to the grip of the paper ejection chain, hold the part of the paper other than the gripping edge between the peripheral surface of the rotating impression cylinder and the peripheral surface of the paper take-up cylinder. It is configured to be changed and carried while being carried. Also, in the case of a multi-color printing machine, a transfer cylinder is provided between the impression cylinders of adjacent printing units of different colors, and when changing the paper from the impression cylinder's claw to the transfer cylinder's claw, the gripper edge of the paper The other part is configured to be gripped between the peripheral surface of the rotating impression cylinder and the peripheral surface of the transfer cylinder while being gripped and transported.

[Problems to be solved by the invention]

However, in such a conventional paper transporting device, even when the portion other than the gripping edge of the paper printed as described above is held by the circumferential surfaces of the opposing cylinders and is conveyed, the paper is released from being held. After that, since the printing surface of the paper is conveyed while contacting the peripheral surface of the transfer cylinder or the take-up cylinder, the printing surface is rubbed and dirty, or the ink on the printing surface is transferred to the peripheral surface of the cylinder, There was a problem that it would get dirty and it would cause printing problems.

[Means for solving problems]

In order to solve such a problem, the present invention proposes a side plate fixed to both ends of a paper delivery cylinder, a claw holder fixed to the barrel shaft of the paper delivery cylinder and supporting a gripper device at both ends. The paper delivery cylinder is composed of an air-blowing nozzle that is held by the side plate so as to be positioned around the shaft, rotates integrally with the drum shaft, and blows air in the radial direction, and forms an arc along the outer circumference of the paper delivery cylinder. And a paper guide extending in the vicinity of the counter contact of the mating cylinder is provided, and the paper delivery cylinder is opened in the radial direction without covering the inside.

[Action]

The paper that is received from the mating cylinder and gripped by the gripper device is conveyed by the rotation of the cylinder, and is blown to the outside of the cylinder by the air from the air-blowing nozzle, and the printing surface on the paper delivery cylinder side is conveyed without touching anything. Since the non-printed surface is conveyed while being attached to the paper guide, the printed surface is not contaminated.

〔Example〕

1 and 2 show an example in which the paper transporting device according to the present invention is applied to a transfer cylinder. FIG. 1 is a side view of the transfer cylinder and its vicinity, and FIG. 2 is a longitudinal section of the transfer cylinder. It is a figure.
In the figure, a plate cylinder 1 having a printing plate mounted on the peripheral surface is in contact with a double-diameter impression cylinder 2, and the outer circumference of the cylinder is cut into two notches in the circumferential direction. A plurality of schematically illustrated claws 3 are arranged side by side in the axial direction. Further, the downstream printing unit is also provided with a double-diameter impression cylinder 5 having a claw 4 in the outer peripheral cutout.
A transfer cylinder 6 having a double diameter is arranged between them.

The transfer cylinder 6 is integrally formed with a cylinder shaft 7 and circular plates 8 as side plates at both ends thereof, and a claw holder 9 protruding from a plurality of positions of the cylinder shaft 7 in a radial direction, and a claw holder 9 therebetween. A skeleton composed of a stay 10 that horizontally connects the discs 8 at several points is integrally formed with the body shaft 7 by casting. Both ends of the body shaft 7 are rotatably supported by bearings 14 fitted to a frame 11 and fixed by nuts 12 and bearing retainers 13. One end of the body shaft has one end. A body gear 15 drivingly connected to the driving side is fixed by a shuttle ring 16 or the like. Reference numeral 17 is a collar that holds a sealing material for the bearing 14. Between the discs 8 on both sides, a fixed nail base bar 18
A rotatable claw shaft 19 is supported by the claw holder 9 at an intermediate portion thereof and is axially bisected in a circumferentially bisected position. A plurality of claw base bars 18 and claw shafts 19 are provided. The claw base 20 and the claw 21 are arranged side by side in the axial direction. And the claws 21 are
When 6, 5 rotate in the direction of the arrow, the cam mechanism on the frame 11 side opens and closes, and the paper 22 is gripped between the claws 3, 4 and conveyed.

In the present device, the peripheral surface of the transfer cylinder 6 has a cylinder peripheral space portion other than a portion corresponding to the claw holder 9 which is a gripping end of the paper 22.
It is completely open to the outside of the body without being covered with anything, and an air blowing device for blowing air to the paper 22 conveyed along the circumference of the body is provided in the center of the body. That is,
A valve case 23, which is formed in an annular shape concentric with the transfer cylinder 6, is bolted to one frame 11, and the disk 8 of the transfer cylinder 6 is brought into sliding contact with the valve case 23 and the end surfaces thereof. An annular valve ring 24 that rotates with the transfer cylinder 6
Is fixed. Further, between the left and right discs 8, a plurality of nozzle tubes 26 having a large number of nozzles 25 directed toward the outside of the body are provided.
Is supported on both sides of the pawl holder 9 by engaging one end with the hole 24a of the nozzle ring 24, while the hole 23a provided on the outer peripheral portion of the valve case 23 is connected to an air source (not shown). The hose 27 base 28 is attached to the frame 29 side holder 29.
It is supported by and is engaged. 23b is an arc-shaped valve groove provided in the valve case 23 in communication with the hole 23a,
It is provided on the same circumference as the circumference of the hole 24a of the valve ring 24, and the hole 24a is opposed to the valve groove 23a by starting the air source while the transfer cylinder 6 is rotating. The air is introduced into the nozzle pipe 26 only at some times, and the air is blown from the nozzle 25 at a predetermined timing. This timing is from when the leading nozzle row passes the counter contact with the upstream impression cylinder 2 and before the rear nozzle row reaches the counter contact with the downstream impression cylinder 5. Further, below the transfer cylinder 6, a paper guide 30 which is formed of a plate material and has a substantially equal length and a concentric circular arc shape is supported near the circumference of the cylinder. Air is blown from the nozzles 25 to the paper 22 that is gripped and conveyed by the paper 21, and the paper 22 is conveyed with its non-printing surface in sliding contact with the paper guide 30.

The operation of the paper conveyance device configured as described above will be described.
When each cylinder rotates and the air source is started, after printing, the impression cylinder 2
The paper 22 that is gripped and conveyed by the nail 3 of the
It is gripped and conveyed by the gripper 21, and further gripped by the claw 4 of the impression cylinder 5 and conveyed. As shown in the figure, the conveyed paper 22 is held by the peripheral surfaces of both the drums 2 and 6 at positions other than the gripping ends, and when the transfer cylinder 6 further rotates, the positions other than the gripping ends are released from the gripping. Will be retained. During this conveyance, the paper 22 is blown with air from the nozzle 25, and the portion other than the gripper end is conveyed in the same arc shape as the body circumference even if the body circumference is not covered. Also, the paper tail is both torso
After being released from the gripping of 2, 6, the non-printing surface is brought into contact with the paper guide 30 and conveyed at a portion other than the gripping end. Therefore, the printing surface of the paper 22 does not come into contact with anything and does not become dirty. Further, even when the downstream impression cylinder 5 is conveyed to the claw 4 after being gripped, the paper 22 is not exposed because the paper tail portion is conveyed in sliding contact with the paper guide.

FIGS. 3 and 4 show another embodiment of the present invention in which the present invention is applied to a paper take-up cylinder. FIG. 3 is a side view of the paper take-up cylinder in the vicinity of which the present invention is applied, and FIG. It is a longitudinal cross-sectional view of the barrel. In the figure, both end shafts 42, 43 of the paper take-up drum 41 are axially supported by the left and right frames 40 via bearings 44, and both end shafts 42, 43 are supported.
Are fitted to both ends of the hollow shaft 45. Reference numeral 46 denotes a gear that is axially attached to one end shaft 43, and is drivingly connected to the driving side through meshing with a gear 47, and the paper take-up cylinder 41 rotates in a direction indicated by an arrow A in the figure. A pair of left and right sprockets 48 are fixed to both ends of the shaft 45 with keys 49. Between the sprockets 48 and the sprockets on the side of the paper ejection device (not shown), the direction of the arrow B shown in the figure is shown together with the body rotation. The paper ejection chain 50 that travels to is stretched. A plurality of sets of claws 51 and claw bases 51a are juxtaposed in correspondence with each other on each of the claw rods supported at regular intervals between the left and right discharge chains 50, and are integrated with the discharge chain 50. The claw 51 is configured to be opened and closed by the cam on the side of the frame 40 and the cam of the paper discharge device while traveling. Reference numerals 52 and 54 are the same plate cylinder and impression cylinder as in the above-mentioned embodiment, and the impression cylinder 54 is provided with a claw 55. The peripheral surface of the paper take-up cylinder 41, which should be in contact with the peripheral surface of the impression cylinder 54, is not covered with anything, but is open to the outside of the cylinder at the front. The paper 53 is gripped by the claws 55 from the claws 55, and then conveyed by the traveling of the paper discharge chain 50.

A valve case 57, which is connected to an air source (not shown) by a hose 56, is fixed to one of the frames 40, and an arcuate tip end thereof is connected to the hose 56 by an air passage 57a. A valve groove 57b is provided. On the other hand, a sprocket 48 on the valve case 57 side is fixed with a valve ring 58 that rotates integrally with the sprocket 48 while sliding the peripheral surface of the sprocket 48 onto the valve case 57. A plurality of nozzle tubes 60 having a large number of nozzles 59 directed toward the other end are horizontally projected toward the other sprocket 48. The engaged hole 58a of each nozzle tube 60 sequentially faces the valve groove 57 by the rotation of the valve ring 58, and the air is blown from the nozzle 59 at a predetermined timing.

With the above configuration, after printing, the impression cylinder
The nails 54 of 54 are replaced by the nails 51 of the paper ejection chain 50,
It is conveyed by the traveling of the paper ejection chain 50. Except for the edge of the paper 53, which is gripped by the claws 51 and conveyed, the plate cylinder
It is not held after it is released from the pinch between 52 and the impression cylinder 54, but since the air from the nozzle 60 is blown to this paper 53, the non-printing surface is the peripheral surface of the impression cylinder 54 or the paper. It is transported while being attached to the guide 61. At this time, since the printing surface is non-contact, it is not rubbed and soiled.

[Effect of device]

As is apparent from the above description, according to the present invention, in the paper transporting device of the sheet-fed rotary printing press, the side plates fixed to both ends of the paper delivery cylinder and the gripper device at both ends support the paper delivery cylinder. The paper delivery cylinder is constituted by a claw holder fixed to the shaft and an air blowing nozzle which is held by the side plate so as to be located around the cylinder shaft and rotates integrally with the cylinder shaft and blows air in the radial direction. A paper guide that is formed in an arc shape along the outer circumference of the paper delivery cylinder and extends so as to be close to the counter contact of the mating cylinder is provided, and the paper delivery cylinder is open in the radial direction without being covered inside. As a result, the paper that is received from the other cylinder and gripped by the gripper device is blown toward the outside of the cylinder circumference by the air from the air blowing nozzle, and the paper is conveyed with only the non-printing surface attached to the paper guide. The surface touches anything Since the paper is conveyed without being soiled, the amount of waste paper generated is reduced and the air-blowing nozzle revolves around as the cylinder rotates. The conveyance is not disturbed, and the stain prevention effect is further increased. Further, when there is a cylinder on the downstream side of conveyance of the paper delivery cylinder, the paper is not brought into close contact with the cylinder when the paper is delivered to the cylinder, and the quality of the printed matter can be secured.

[Brief description of drawings]

1 to 4 show an embodiment of a paper conveying device of a sheet-fed rotary printing press according to the present invention, FIG. 1 is a vertical sectional view of a transfer cylinder and its vicinity, and FIG. FIG. 3 is a vertical sectional view of the body, and FIG. 3 and FIG. 4 show another embodiment of the present invention.
FIG. 3 is a side view of the vicinity of the paper take-up cylinder embodying the present invention, and FIG. 4 is a vertical sectional view of the paper take-up cylinder. 2,5,54 …… impression cylinder, 3,4,55 …… claws, 6 …… transfer cylinder, 21,51
...... Claws, 22,53 …… Paper, 25,59 …… Nozzles, 26,60 …… Nozzle tubes, 30,61 …… Paper guides, 41 …… Paper take-up cylinders.

Continuation of the front page (56) Reference JP-A-52-34802 (JP, A) JP-A-62-173258 (JP, A) Actually opened 60-29628 (JP, U) Actually opened 61-110661 (JP , U)

Claims (1)

[Scope of utility model registration request] 1. A partner with a gripper device (20, 21) which circulates along the outer periphery of the cylinder (6) by rotation of a paper transfer cylinder (6) provided with a cylinder shaft (7) which is in contact with the partner cylinder. In a paper transporting device of a sheet-fed rotary printing press that transports gripped paper (22) from a cylinder, side plates (8) fixed to both ends of the paper delivery cylinder (6) and gripper devices at both ends. (20,21)
Claw holder (9) that supports and is fixed to the body shaft (7)
And an air blowing nozzle (25) which is held by the side plate (8) so as to be positioned around the body shaft (7), rotates integrally with the body shaft (7), and blows air in a radial direction. The paper delivery cylinder (6) is constituted, and this paper delivery cylinder (6)
A paper guide (30), which is formed in an arc shape along the outer circumference of the paper and extends so as to be close to the counter contact of the counterpart cylinder, is provided in the radial direction without covering the inside of the paper delivery cylinder (6). A sheet conveying device for a sheet-fed rotary printing press, which is opened to the outside.