JPS62248642A - Double diameter drum device of sheet fed printer with reversing mechanism - Google Patents

Abstract

PURPOSE:To simplify the structure of a drum by fitting a support member to a shaft on both ends of a barrel with grooves provided in circumferential direction in freely rotatable fashion, engaging a suction member mounted on a suction pipe supported between support members-with each groove and fixing the drum and support members after adjustment of their phases. CONSTITUTION:A double diameter drum 12 consists of a drum with shafts 32, 33 at both ends supported on a shaft on the side of a frame 36. The drum 31 has a plurality of grooves 59 extending in circumferential direction on an external peripheral wall. The shafts 32, 33 on both ends are fitted with a side plate 47 in freely rotatable manner. Between these right and left side plates 47, a suction air pipe 48 connected to a suction air source through a rotary valve 55 is supported, and over this suction air pipe 48, a plurality of suction air heads 59 connected continuously to the inner hole of the suction air pipe are fixed in parallel and engaged with each groove 59. Then the drum 31 and the side plate 47 are phase-adjusted in accordance with one side and both side printings and paper size, and fastened with nuts 74. Thus the 31 and the side plate 47 are strongly fixed with a surface pressure created by a keep plate 69b on both sides.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is a sheet-fed printing press with a reversing mechanism, in which a reversing cylinder and a double-diameter cylinder are connected at the time of transition from single-sided printing to double-sided printing, and from duplex printing to single-sided printing. This invention relates to a phase switching device that switches the phase and the phase between a claw on a double diameter cylinder and a suction head.

[Conventional technology]

With the diversification of printing, a sheet-fed printing press with a reversing mechanism for each building, which can be used for single-sided printing and double-sided printing, was proposed and put into practical use. There are two main types: one type with a double-diameter reversing cylinder as a reversing cylinder, and three-piece type with a transfer cylinder, a reversing cylinder, and a double-diameter cylinder between them.

3 and 4 are cylinder arrangement diagrams shown to explain the printing operation of a three-type sheet-fed printing press with a reversing mechanism, respectively, and FIG. 3 shows the case of one-sided printing. FIG. 4 shows the case of double-sided printing.

Therefore, the outline of the structure and operation of this type of printing press will be explained based on the same figure. Below the plate cylinder (not shown), there is a pawl 2 and a pawl inside the outer circumferential notch diagonally below the blanket cylinder 1 which is in contact with the plate cylinder (not shown). An impression cylinder 5 equipped with a gripping claw device 4 (hereinafter referred to as mold 4) consisting of a base 3 is provided with its cylindrical surfaces facing each other, and
The printing unit on the downstream side also includes a blanket cylinder 6 facing the plate cylinder,
A gripping nail consisting of a nail 1 and a nail base 8! An impression cylinder 10 having an inner surface facing the blanket cylinder 6 is provided. And between both impression cylinders 5 and 10,
A reversing mechanism is provided which includes three cylinders, a transfer cylinder 11, a double-diameter cylinder 12, and a reversing cylinder 13, whose surfaces are in contact with each other. Of these, the transfer drum 11 is made up of a claw 14 and a claw base 15, and is made of low iron! 16 (hereinafter referred to as claw 16)! ! : I am preparing for Togawa Gai's major shortage.

Further, the double diameter cylinder 12 has a double diameter of the transfer cylinder 11 etc. by 1,
Two sets of gripping claw devices 19.20 (hereinafter referred to as claws 19.2) each consisting of a claw 1T and a claw base 18 are located at positions dividing the outer circumferential portion into two.
0], and two sets of suction heads 21, 22 are arranged at positions that precede the valleys 19, 20 by a predetermined angle in the direction of rotation of the cylinder. A plurality of suction heads 21, 22 are arranged in parallel in the axial direction on the outer circumference of the double diameter barrel 12, and are formed so as to be movable in the circumferential direction. The structure is such that the phase can be adjusted. Furthermore, in the outer peripheral notch of the reversing cylinder 13, a gripping claw device (
A) Σ gripping claw device (13) 28 (hereinafter referred to as claw C) consisting of 25 (hereinafter referred to as claw (A) 25), claw 26, and claw base 2T
B) 28 and neck) are disposed adjacent to each other in the circumferential direction. The six cylinders 1,5°11.12, 13, and 10.6 are driven and connected to each other by gears, and among these, the reversing cylinder 13
On the end shaft of the shaft (5), a fixed fixed gear and a rotatable rotating gear are provided so that they can be fixed to each other and can be fixed and released.
The fixed gear meshes with the gear of the impression cylinder 10, and the rotating gear meshes with the gear of the double diameter cylinder.

Due to this configuration, in the case of single-sided printing shown in FIG. The paper 30 that has been transferred is further conveyed while being held in the grip of the claw 16 of the transfer cylinder 11, and the first color printing is applied to the surface of the paper 30 as it passes between the blanket cylinder 1 and the presser Jffi 15. Ru.

This paper 30 is transferred from the claw 16 of the transfer drum 11 to the claw 19 (20) of the double-diameter drum 12 and conveyed, and the claw 19 and the claw (A) 25 face each other as shown in the figure. Claw (A)
) 25 and transported. After this, the paper 30 is further picked up by the claw 9 of the impression cylinder 10 and conveyed, and as it passes between the blanket cylinder 6 and the impression cylinder 10, the second color is printed on the same surface as the first color on the paper 30. will be applied.

When transitioning from single-sided printing to double-sided printing, the state in which the claws 19 and 25 correspond to each other in FIG. 3 changes to the state in which the suction head 21 and claws CB) 28 correspond to each other as shown in FIG. 4. By rotating the rotary gear as shown in FIG.
The relative phase with 22 is adjusted to accommodate changes in paper size. Also, the position where the claws 19 and 20 of the double diameter) @12 release the paper 30 from their grips differs by the length of the paper 30 in the vertical direction between single-sided printing and double-sided printing, so the action of the paper release cam Adjust position. After performing the switching adjustment in this way, when cylinder 6 is rotated, the paper 30, whose surface has been printed in the same way as in the case of single-sided printing, is held in the claws 19 (20) of the double-diameter cylinder 12. The paper 30 is conveyed while the paper tail is attracted by the suction head 21 (22), and the paper 30 is conveyed until the paper tail reaches the opposing contact points on both sides 12 and 13, as shown by reference numeral 30A in the figure. At this time, by opening and closing the claw (B) 28 and releasing the suction head 21, the claw 2
releases the grip, and the paper 30A is conveyed by the reversing cylinder 13 with the trailing edge of the paper leading. During this transportation, both claws (A) 2
5, (B) 28 opens and closes with a momentary timing difference, and the paper 30A is transferred from the claw (B) 2B to the claw (A) 25 and conveyed. Then, claw (A) 25 and impression cylinder 1
When the paper 30A faces the claw 9 of the paper 30, the paper 30A is gripped by the claw 9 and conveyed as shown by the reference numeral 30B in the figure. this paper 3
Since the back side of the sheet 011 comes into contact with the blanket cylinder 6 when it passes between the blanket cylinder 6 and the impression cylinder 10, printing is applied to the back side, and by printing on the front side, the paper is discharged as double-sided printing. .

Double-diameter cylinder 1 of a sheet-fed printing press with a reversing mechanism that operates as described above
2 has claws 19 and 20 that hold the tip of the paper in its mouth as mentioned above.
and suction heads 21 and 22 for suctioning the tail of the paper), and it is necessary to adjust the mutual phase in the circular direction when switching between single-sided printing and double-sided printing or when changing the paper size. be. Therefore, various types of double-diameter barrel devices have been proposed in which a barrel body and a support member for an adsorption member are provided separately to enable mutual phase adjustment.

[Problem that the invention seeks to solve]

However, among conventional double-diameter barrel devices, the one disclosed in Japanese Patent Publication No. 44-9056, for example, has a barrel body formed of a plurality of segments divided in the axial direction, and fixed to the central axis side. Instead of having a complicated structure and high cost because a plurality of suction member support arms and the segments are arranged in parallel in the axial direction, the body body is There was a problem in that the outer periphery was slightly eccentric but caused printing defects.

For example, in the one disclosed in Japanese Patent Publication No. 56-9426, a part of the outer wall of the trunk body fixed on the shaft is formed into a comb shape, and the comb-shaped part is fixed to the central shaft. However, the structure is complicated and the precision between the circumferential surface of the body and the shaft is difficult to obtain.

[Means for solving problems]

In order to solve these problems, in the present invention, both end shafts of the trunk body, in which a plurality of grooves extending in the circumferential direction are provided in the outer eight walls, are supported on the frame side, and support members are attached to each of the end shafts. are rotatably fitted, and between these left and right supporting members, an intake pipe connected to a suction air source via a rotary pulp is supported, and a plurality of intake pipes are connected to the inner hole of the intake pipe. The N suction members are fixed in parallel and engaged with the respective grooves, and a fixing means is provided for fixing the trunk body and the support member after phase adjustment.

[For production]

When the left and right support members are attached to both end surfaces of the trunk body whose both end shafts are pivotally supported on the frame side and fixed with a fixing means, each suction member parallel to the intake pipe supported between the left and right support members is 6 grooves and exposed to the circumferential surface of the trunk. When the drum rotates, the end of the paper held in the claw is attracted to the suction member 1. When switching between single-sided printing and double-sided printing, when the fixing means is loosened, the supporting member can be rotated relative to the cylinder body, so when the supporting member is rotated, the suction member integrated with it will move into the groove. to adjust the phase.

〔Example〕

1 and 2 show an embodiment of the double diameter barrel device according to the present invention, FIG. 1 is a longitudinal sectional view thereof, and FIG.
It is an A sectional view. The cylinder arrangement, general JIP Sakaki construction of the 6 cylinders, printing operation, etc. have been explained based on Fig. 3 and Fig. 4, so detailed explanation thereof will be omitted.
The following explanation will be given using the same figure when necessary. In the figure, the double diameter barrel 12 includes a cylindrical barrel body 31 having a casting space, and end shafts 32 and 33 integrally formed concentrically at both ends thereof. Axis 32.33 is
It is rotatably supported by frames 36 on both sides via rolling bearings 35 fitted in a bearing case 34. 37
．． 38 is a bearing holder that presses down the outer ring of the rolling bearing 35, and 39 is a collar that also holds down the inner ring. A double diameter barrel gear 41 that meshes with the rotary gear 40 on the reversing barrel 13 side is fixed to one end shaft 32 with a bolt 42. It is fixed by a spun ring 44 drawn at 43. A bearing presser 45 and a collar 46 are also provided on the other end shaft 33 side. As described above, the rotary gear 40 is fixed to an adjacent fixed gear on the side of the reversing cylinder 13, and rotation is transmitted between the fixed gear and the rotary gear 4.
By releasing the fixation with 0, the reversal cylinder 13 and the double diameter cylinder 12
The configuration is such that phase adjustment is possible.

Side plates 4T, which are formed in a lantern shape when viewed from the front, are rotatably fitted into the large diameter portions 32a and 32b of the shafts 32 and 33 at both ends. Inward movement is restricted by contacting the end faces of the inner portion 31a and the southern portion of the outer periphery 31b. This rotatable side plate 47 is fixed to the trunk body 31 by a fixing device described later.

An intake pipe 4B is rotatably supported via a bearing 49 at a location where the outer periphery of the side plates 47 on both sides is bisected in the circumferential direction, and an end of the intake pipe 48 is supported on one side plate 47. A main pipe 51 parallel to the intake pipe 48 is supported between the end pipe 50 fitted close to the intake pipe 48 and the side plate 47 on the opposite side.

52 is fixed to the main pipe 51 side and connects the main pipe 51 and the intake pipe 48.
This is a bracket that connects the intake pipe 48 at the center.
This bracket 52 rotatably supports the
A communication hole 53 is provided that allows the main pipe 51 and the intake pipe 48 to communicate with each other. 54 is an annular fixed valve fixed to the frame 36 of the piece 111i1, and is connected to a vacuum pump (not shown) as a suction air source by a hose or the like, and the end pipe 50 is connected to the end of the valve 54. An arcuate rotary valve 55 with fcff is in sliding contact. The stationary pulp 54, the rotary valve 55, and the end pipe 50 are provided with an air passage 56 that communicates the main pipe 51 with the vacuum pump. Air in the intake pipe 48 is sucked through the main pipe 51 and the communication hole 53 only during a predetermined timing when the pulp is in sliding contact with and communicates with the arc-shaped air passage of the fixed pulp 541111. A plurality of stratified heads 58 as a stratified member each having a suction port 57 communicating with the intake pipe 4B are arranged in parallel in the axial direction and fixed in a split manner.
The suction port 5T is opened at the curved surface of the trunk body 31. Then, the suction belly button °58 is the same outer flesh part 31b of the trunk body 31.
The side plate 47 is inserted into a groove 59 extending at a predetermined angle in the circumferential direction, and the side plate 47 is unfixed from the trunk body 31.
7, the circumferential phase of the claws 19, 20 and the suction head 58 is adjusted ((configured). The frame 36 is attached to the lever 60.
Cam follower 6 corresponding to the cam surface of the cam (not shown) on the side
1 comes into contact with the cam surface of the cam, the suction pipe 48 is rotated by a predetermined angle via the lever 60, the layering head 58 moves within the groove 59, and the suction port 5T moves the end of the filter paper in the vertical direction. ＼It is constructed to be pulled and put under tension. What is generally indicated by the reference numeral 62 in FIG. 2 is a spring mechanism that brings the cam follower 61 into pressure contact with the cam surface. It is formed of a spring shaft 65 which is pivotally connected to the play part of the cam and whose other end is inserted into the post 64 on the side plate 4T side, and a compression coil spring 66 interposed on this spring shaft 65. The suction head is configured to rotate in cooperation with each other. Reference numeral 67 is a grease nip for lubricating the rotation of the intake pipe 48, and casing 68 is a bottle used for driving a printing machine (not shown).

Next, a suction 4 member fixing device for fixing the layered head 58 to the trunk body 31 side via the side plate 47 after adjusting the phase will be described. That is, a presser presser hole 68 is provided in the large diameter portions 32a and 33a, which are the bases of both ends 41132.33, passing through the presser presser hole 68 in the diametrical direction. l1169 has been inserted. For assembly purposes, this presser bar 69 is formed of a main body 89a and a pair of pressers 69b that are removably bolted to both ends of the main body 89a.
c is drilled. In addition, the center interior 3 of the trunk body 31
There is also a shaft hole 31c in the center of 1a and both end shafts 32 and 33.

32c and 33b are bored, respectively, and the shaft holes 33b, 69e, 31c+69c extend over the entire length of the trunk.

A fixed shaft TO is inserted through 32c. This fixed shaft TO has a nut 71 screwed onto one threaded portion.
A nut 74 having a square hole 74a is fixed to a screw member 73 screwed into the threaded portion of the end, and the nut 74 is a gear. Movement in the axial direction is restricted by a grate 75 bolted to 41. A presser tube 76, a pair of washers 77, and a plurality of disc springs 78 and thrust bearings 79 are interposed between the screw member T3 and the presser foot 69. C,
Insert a spanner into the square hole 74b of nut T4 and tighten nut 7.
4, the fixed shaft 7 is tightened by the screw action of the screw member T3.
0 is drawn, a surface pressure is generated between the presser foot 69b and the end surfaces of the side plate 47 and the cylinder body 31, and the side plate 4T and the cylinder body 31 are fixed by this surface pressure. .

In this embodiment, a concave-shaped surface pressure adjusting member 80 is inserted between the presser foot 69b and the pressing surface of the side plate 4T, so that even if the filling rod 69 is bent due to the surface pressure, the surface pressure is maintained. The adjustment member 80 is configured so that the arcuate surface absorbs this and keeps the surface pressure constant.

B1 is a click mechanism that includes a ball that is in contact with the hexagonal intercondylar plane of nut 1-74 and a spring member that pushes this ball. is configured to stop. In addition, in FIG. 2, the reference numeral 82 is the aforementioned claw 19 (20).
The side plate 47 is used when adjusting the phase between the suction head 58 and the suction head 58.
This is a spring member that is lightly integrated with the trunk body 31 so that they rotate together.

The operation of the double shearing cylinder device configured as above will be explained.

In the double-sided printing operation explained based on FIG.
The tail of the paper 30 held by the claw 19 (2G) of No. 2 is the inner barrel 11.
12, the rotary pulp 55 comes into contact with the stationary pulp 54, and the air passage 56, the main pipe 51, and the communication hole 5
Since air is sucked through the suction port 57 of the suction head 58 through the suction pipe 48 and the suction pipe 48, the tail of the paper 30 is attracted to the suction port 57. When the cylinder 6 further rotates, the cam follower 61 comes into contact with the cam surface and rotates the lever 60 against the elastic force of the compression coil spring 66, so the intake pipe 48 rotates and the suction head 58 moves into the groove. 59 to tension the paper 30. In this state, when the trailing edge of the paper faces the claw CB) 28 of the reversing cylinder 13, the claw CB) 28 grips the trailing edge of the paper, the -1-tally pulp 55 separates from the fixed pulp 54, the suction stops, and the trailing edge of the paper is adsorbed. Since the adsorption by the head 58 is released,
The paper 30 is conveyed while being reversed. Other double-sided printing operations and single-sided operations have been described above with reference to FIGS. 3 and 4, so their explanations will be omitted.

When switching between single-sided and double-sided printing or changing the paper size, insert a spanner into the square hole 74a of the nut 74 and rotate the nut 74 in the loosening direction. 70 is removed from the screw member 73, the surface pressure exerted by the presser foot 69b is released, and the fixation between the side plate 4T and the trunk body due to the surface pressure is released. Therefore, when the rotating gear 40 is unfixed and rotated via a gear device (not shown), the gear 41 rotates and the main body 31 rotates, and at first the side plate 4T becomes entangled and rotates, but then it is attracted When the head 58 is moved to the predetermined position for single-sided or double-sided printing, the side plate 47 is stopped by a device (not shown), and the cylinder body 31 is then stopped.
Since the chisel rotates, it is stopped at a position that corresponds to the paper size. Then, when the nut 74 is rotated in the tightening direction, the fixed shaft 70 is screwed into the screw hole of the screw member T3 by the screw action of the screw member T3, so that the presser bar 69 on the opposite side
are pulled together, surface pressure by the pressers 69b on both sides is applied to the side plate 47 via the surface pressure adjustment member 80, and the side plate 47 and the trunk body 31 are firmly fixed. In this case, because the surface pressure adjusting member 69b is provided in this embodiment, even if the presser bar 69 is bent due to excessively high surface pressure, the deformation of the presser foot 69b is caused by the surface pressure adjusting member 69b. Since the pressure is absorbed by the arcuate surface, the presser foot 69b does not deform or become trapped, and the surface pressure remains constant. Furthermore, even if the fixing shaft 70 may stretch due to an increase in temperature during operation, this stretch is absorbed by the disc spring 78 in this embodiment, and the fixation between the side plate 47 and the trunk body 31 is never slackens.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a double-diameter cylinder device for a sheet-fed printing press with a reversing mechanism, both end shafts of the cylinder body, which has a plurality of grooves extending in the circumferential direction on the outward wall, are connected to the frame. A suction pipe connected to a suction air source via a rotary pulp is supported between these left and right support members, and a suction pipe is supported between the left and right support members. a plurality of intakes on the intake pipe communicating with the inner hole; 1
Fix the members in parallel and do the above step 4! While engaging with rm,
By providing a fixing means for fixing the trunk body and the support member after phase adjustment, the structure of the trunk body is significantly simplified compared to a conventional structure in which the trunk body is divided in the axial direction. The supporting structure and fixing structure of the suction member are simplified, which reduces processing costs, and since the cylinder body and shaft are integrally formed, the processing accuracy of the cylinder circumferential surface is improved and printing defects are avoided. This improves the quality of printed matter. Furthermore, assembly becomes easier and assembly time is reduced.

[Brief explanation of drawings]

1 to 4 show an example of a double-diameter cylinder device for a sheet-fed printing press with a reversing mechanism according to the present invention, FIG. 1 is a longitudinal sectional view thereof, and FIG. Figure 3 is a cylinder arrangement diagram of a sheet-fed printing press with a reversing mechanism shown to explain the single-sided printing operation,
FIG. 4 is a cylinder arrangement diagram of a sheet-fed printing press with a reversing mechanism, shown to explain the double-sided printing operation. 12--Double diameter cylinder, 31--City body, 32.33
...M-axis, 36...Frame 47...Fist/Hai 1
Plate, 48...Intake pipe, 55...a-tali pulp, 58...Intake head, 59...Fist/groove, 69...
... Presser bar, 69b φ... Presser foot, 70 fist... Fixed shaft, 73... Screw member. Figure 2

Claims (1)

[Claims] A trunk main body having a plurality of grooves extending in the circumferential direction and parallel to each other in the axial direction on the outer peripheral wall and having both end shafts pivotally supported on the frame side, and a pair of left and right shafts rotatably fitted to the both end shafts, respectively. a support member, an intake pipe whose both ends are supported by these left and right support members, which penetrates the outer circumferential space of the body body and is connected to a suction air source via a rotary valve at the body end; A plurality of suction members are fixed in parallel to each other and communicate with the inner holes thereof and engage with the respective grooves, and a fixing means for fixing the trunk body and the left and right support members after phase adjustment. A double-diameter cylinder device for sheet-fed printing presses with a reversing mechanism.