JPH0435171Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a sheet-fed printing press with a reversing mechanism, which can freely adjust the phase of the paper that is held by the claws of the double-diameter cylinder and held by suction. The present invention relates to an adsorption member fixing device for fixing an adsorption member to a trunk body side after phase adjustment.

[Conventional technology]

With the diversification of printing, various types of sheet-fed printing presses with reversing mechanisms have been proposed and put into practical use, allowing one machine to be used for both single-sided and double-sided printing. There are two main types: a one-piece type with a double-diameter reversing cylinder, and a three-piece type with a transfer cylinder, a reversing cylinder, and a double-diameter cylinder between them.

4 and 5 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. 4 shows the case of single-sided printing; Figure 5 shows the case of double-sided printing. Therefore, an overview of the structure and operation of this type of printing press will be explained based on the same figure. Below the printing cylinder (not shown) and facing it diagonally below the blanket cylinder 1, there are claws 2 and a claw stand 3. An impression cylinder 5 having a gripping claw device 4 (hereinafter referred to as the claw 4) in a notch on its outer periphery is provided with its circumferential surfaces facing each other, and a printing unit on the downstream side is also provided with a printing unit facing the plate cylinder. An impression cylinder 1 includes a rubber cylinder 6, a gripping claw device 9 (hereinafter referred to as the claw 9) consisting of a claw 7 and a claw base 8, and has a peripheral surface facing the rubber cylinder 6.
0 is arranged. And both impression cylinders 5,
A reversing mechanism consisting of three rollers, a transfer cylinder 11, a double diameter cylinder 12, and a reversing cylinder 13, whose circumferential surfaces are in contact with each other is provided between the cylinders 10 and 10. Of these, the transfer drum 11 is provided with a gripping claw device 16 (hereinafter referred to as the claw 16) consisting of a claw 14 and a claw base 15 in an outer peripheral notch. Further, the double diameter cylinder 12 has a double diameter as the transfer cylinder 11, etc., and two sets of gripping claw devices 19 each consisting of a claw 17 and a claw base 18 are provided at positions dividing the outer circumferential portion into two. 20 (hereinafter referred to as pawls 19 and 20), and two rows of suction heads 21 and 22 as suction members are arranged at a position that precedes each pawl 19 and 20 by a predetermined angle in the direction of rotation of the cylinder. It is set up.
The suction heads 21 and 22 are connected to the double diameter cylinder 12.
A plurality of claws are arranged in parallel in the axial direction on the outer periphery of the claw 1 and are movable in the circumferential direction.
9 and 20 so that the phase in the circumferential direction can be adjusted. Further, in the outer circumferential notch of the reversing cylinder 13, a gripping claw device A25 (hereinafter referred to as claw A25) consisting of a claw 23 and a claw stand 24, and a gripping claw device B28 (hereinafter referred to as claw A25) consisting of a claw 26 and a claw stand 27 are provided. Claw B2 below
8) are arranged adjacent to each other in the circumferential direction. And each trunk 1, 5, 11, 12, 13, 1
0 and 6 are driven and connected to each other by gears, and among these, on the end shaft of the reversing cylinder 13, a fixed gear whose shaft is fixed and a rotating gear which is rotatable are 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.

With this configuration, in the case of single-sided printing shown in FIG. 30 further includes a transfer cylinder 11
This paper 30 is conveyed by being held in the claw 16 of
When passing between the blanket cylinder 1 and the impression cylinder 5, the first color is printed on the surface. This paper 30 is
From the claw 16 of the transfer barrel 11 to the claws 19, 2 of the double diameter barrel 12
0 in its mouth and transported, and as shown in the figure, the claw 1
9 and the claw A25 are opposed to each other, so that the paper is held in the claw A25 and conveyed. Thereafter, the impression cylinder 10 is further held in the jaw 9 and conveyed, and the rubber cylinder 6
When passing between the paper 30 and the impression cylinder 10, the second color is printed on the same surface of the paper 30 as the first color.

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. 4 is changed to the state in which the suction head 21 and claws B28 correspond to each other as shown in FIG. The rotary gear is rotated to convert the upstream cylinder group including the double diameter cylinder 12 into the reversing cylinder 13.
At the same time, the relative phase between the claws 19, 20 on the double diameter cylinder 12 and the suction heads 21, 22 is adjusted to accommodate changes in paper size. Also,
The position where the claws 19 and 20 of the double diameter cylinder 12 release the paper 30 from their grips is approximately the same as the paper 30 in single-sided printing and double-sided printing.
Since the length in the vertical direction changes, adjust the operating position of the paper release cam. After performing the switching adjustment in this way, when each cylinder is rotated, the paper 30, whose surface has been printed in the same manner as in the case of single-sided printing, is caught 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 contact point between the cylinders 12 and 13, as shown by reference numeral 30A in the figure. At this time, the opening/closing of the claw B28 and the suction head 21
As a result of suction and release, the claw 20 releases its grip at the same time as the trailing edge of the paper 30A is gripped, and the paper 30A is conveyed by the reversing cylinder 13 with the trailing edge leading. During this conveyance, both claws A25 and B28 open and close at different timings for a moment, and the paper 30A is moved from claw B28 to claw A25.
It is transferred in the mouth. And nail A25
When the claws 9 of the impression cylinder 10 face each other, the paper 30A is gripped by the claws 9 and conveyed as shown by reference numeral 30B in the figure. This paper 30B consists of a rubber cylinder 6 and an impression cylinder 1.
0, the back side comes into contact with the blanket cylinder 6, so printing is applied to the back side, and the paper is discharged as double-sided printing by printing on the front side.

As described above, the double diameter cylinder 12 of the three-type sheet-fed printing press with a reversing mechanism that operates in this manner has claws 19 and 20 that grip the leading edge of the paper and suction heads 21 and 22 that attract the tail end of the paper. It is necessary to adjust the mutual circumferential phase when switching between single-sided printing and double-sided printing or when changing paper size.
Therefore, a plurality of grooves extending in the circumferential direction are provided in parallel in the axial direction on the circumferential surface of the cylinder body, and a plurality of suction heads supported on the cylinder body side by some means are engaged in each groove. Various types of suction member phase adjusting devices have been proposed and used in the past, in which the suction head is moved circumferentially within a groove to adjust the phase and then fixed.

[Problem that the invention attempts to solve]

However, this type of device in the past,
Arms are fixed to both end shafts of a double-diameter cylinder supported by frames on both sides, and multiple suction members are fixed to the shaft connecting these arms. When adjusting the phase, the arms on both sides are fixed to the shaft end of the cylinder. The structure is such that the phase is adjusted by loosening the bolt that fixes it to the frame, and then tightening the bolt to fix it.Due to the structure, the arms must be installed inside the frames on both sides, so each time the phase is adjusted, the narrow frame There was a problem in that it was necessary to loosen and tighten two bolts on the inside and on both sides, requiring a great deal of effort and a long time to make adjustments.

[Means for solving problems]

In order to solve these problems, in the present invention, support members on both sides that support both ends of the shaft member to which suction members are attached in parallel are rotatably fitted to both end shafts of the double diameter cylinder. The inner surface thereof is attached to the end surface of the trunk body, and a shaft having a head and a threaded portion at both ends is provided passing through the central shaft hole of the trunk body and both end shafts, and the shaft bases of both ends are attached. A fixing member is provided that penetrates in the diametrical direction and is attached to the outer surface of the support member and moves by screwing the threaded member into the threaded portion of the shaft to fix the support member and the trunk body by surface pressure, and Between the joining surfaces of the fixing member and the supporting member,
A deflection deformation absorbing member for the fixing member was interposed by fitting the arcuate convex surface and the arcuate concave surface.

[Effect]

When adjusting the phase of the adsorption member, loosening the screw member outside the frame on one side releases the surface pressure from the fixing member and allows the support member to rotate. A plurality of suction members supported through the drum body gradually move in the circumferential direction of the trunk body, and the phase of the suction members is adjusted. After the adjustment, when the screw member is tightened, the support member and the trunk body are firmly fixed by surface pressure. Further, the bending deformation of the fixing member due to excessive surface pressure is absorbed by the absorbing member.

〔Example〕

1 and 3 show an embodiment of the suction member fixing device according to the present invention, FIG. 1 is a longitudinal cross-sectional view of a double diameter cylinder in which this is implemented, FIG. 2 is a cross-sectional view along AA of FIG. 1, FIG. 3 is an enlarged sectional view of the surface pressure acting part. The cylinder arrangement, general configuration of each cylinder, printing operation, etc. have been explained based on FIGS. 4 and 5, so detailed explanation thereof will be omitted, and the same figures will be used in the following explanations 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,
Both end shafts 32 and 33 are connected to frames 36 on both sides via rolling bearings 35 fitted in a bearing case 34.
It is rotatably supported on the shaft. 37 and 38 are bearing holders that press down the outer ring of the rolling bearing 35;
9 is a collar that also presses the inner ring. One end shaft 32 has the rotating gear 4 on the reversing cylinder 13 side.
A double diameter barrel gear 41 that meshes with the end shaft 3 is fixed by a bolt 42, and the double diameter barrel gear 41 and the end shaft 3
2 is fixed by a shuppan ring 44 pulled together by a bolt 43. A bearing presser 45 and a collar 46 are also provided on the other end shaft 33 side. As described above, the rotating gear 40 is fixed to an adjacent fixed gear on the inversion cylinder 13 side and rotation is transmitted thereto, and by releasing the fixation between the fixed gear and the rotation gear 40, the inversion cylinder 13
The structure is such that the phase between the double diameter barrel 12 and the double diameter barrel 12 can be adjusted.

A side plate 47 is rotatably fitted into the large diameter portions 32a, 33a of both end shafts 32, 33, and functions as a support member for supporting an intake pipe which is shaped like a bell when viewed from the front. The side plate 47 is prevented from moving inward by having its inner surface contact the end surfaces of the axial center portion 31a and the outer peripheral portion 31b of the trunk body 31. The rotatable side plate 47 is attached to the trunk body 31 by a fixing device which will be described later.
Fixed. The intake pipe 48 is fitted with a bearing 49 at a location where the outer periphery of the side plates 47 on both sides is divided into two in the circumferential direction.
The intake pipe 50 is rotatably supported via an end pipe 50, which is fitted into the side plate 47 on one side in close proximity to the end of the intake pipe 48, and the side plate 47 on the opposite side. A main pipe 51 parallel to the pipe 48 is supported.
A bracket 52 is fixed to the side of the main pipe 51 and connects the main pipe 51 and the intake pipe 48 at the center, and rotatably supports the intake pipe 48. A communication hole 53 is provided to allow the pipe 51 and the intake pipe 48 to communicate with each other. 54 is an annular fixed valve fixed to the frame 36 on one side, and is connected to a vacuum pump (not shown) to a suction air source through a hose or the like, and the end pipe 50 is connected to the end surface of the valve. An arc-shaped rotary valve 55 mounted on the rotary valve 55 is in sliding contact with the rotary valve 55 . Then, the fixed valve 54, the rotary valve 55 and the end pipe 5
0 is provided with an air passage 56 that communicates the main pipe 51 with the vacuum pump, and when the double diameter barrel 12 rotates, the air passage on the rotary valve 55 side slides into contact with the arcuate air passage on the fixed valve 54 side. Air in the intake pipe 48 is sucked through the main pipe 51 and the communication hole 53 only during a predetermined timing of communication between the main pipe 51 and the communication hole 53. A plurality of suction heads 58 as suction members each having a suction port 57 that communicates with the suction pipe 48 are fixed in parallel in the axial direction with split clamping. has been done. The suction head 58 is engaged in a groove 59 extending in the circumferential direction at a predetermined angle in the outer circumferential wall portion 31b of the trunk body 31, and the suction head 58 is inserted into a groove 59 that extends by a predetermined angle in the circumferential direction. By rotating the suction head 58, the circumferential phase of the claws 19, 20 and the suction head 58 can be adjusted. A cam follower 61 corresponding to the cam surface of a cam (not shown) on the frame 36 side is pivotally attached to a roller lever 60 that is pivotally attached to a protrusion of the intake pipe 48 on the rotary valve 55 side. When the cam follower 61 comes into contact with the cam surface of the cam, the suction pipe 48 rotates by a predetermined angle via the roller lever 60, the suction head 58 moves within the groove 59, and the end of the paper is suctioned by the suction port 57. It is constructed so that it is tensioned by pulling it vertically. In FIG. 2, the cam follower 61 is designated as a whole by 62.
The spring mechanism includes a lever 63 that is clamped and fixed to the protruding end of the intake pipe 48 on the side opposite to the rotary valve 55, and a lever 63 that is pivoted to the free end of the lever 63 and has the other end attached to the side plate 47. It is formed by a spring shaft 65 inserted into a side post 64 and a compression coil spring 66 interposed on this spring shaft 65.
The suction head is configured to rotate in cooperation with a cam. 67 is a grease nip for lubricating the rotation of the intake pipe 48.

Next, after adjusting the phase of the suction head 58, the side plate 47
The suction member fixing device that fixes the suction member to the barrel body 31 side via the shafts 32 and 3
The large diameter portions 32a and 33a, which are the bases of the 3, are provided with presser bar holes 68 passing through in the diametrical direction.
A presser bar 69, the main part of which is a round bar, is inserted into the presser bar hole 68. For assembly purposes, the presser bar 69 is formed of a main body 69a and a pair of pressers 69b detachably secured to both ends by bolts. The main body 69a has a shaft hole 69c at its center.
In addition, a shaft hole 3 is formed at the center between the central part 31a of the body 31 and the two end shafts 32, 33.
1c, 32c, 33b are drilled, and the shaft holes 33b, 69c,
A fixed shaft 70 is inserted through 31c, 69c, and 32c. The fixed shaft 70 is restricted from moving in one direction by a nut 71 and a collar 72 that are screwed into one of the threaded portions. A screw member 73 that is screwed into the threaded portion at the end has a square hole 74.
A nut 74 having a length a is fixed to the gear 41. The nut 74 is connected to a plate 75 which is bolted to the gear 41.
Axial movement is restricted by the above. A presser tube 76, a pair of washers 77, a number of disc springs 78 and a thrust bearing 79 are interposed between the screw member 73 and the presser bar 69. By doing so, when a spanner is inserted into the square hole 74a of the nut 74 and the nut 74 is tightened, the screw member 73 causes the fixed shaft 70 to rotate.
The presser 69b is pulled in, and a surface pressure is applied between the presser 69b and the end faces of the side plate 47 and the body 31.
The device is constructed so that the pressure between the presser bar 69b and the body 31 is fixed. In this device, a semi-cylindrical deflection absorbing member 80 is inserted between the presser bar 69b and the pressing surface of the side plate 47, with its arcuate convex surface fitting into the arcuate concave surface of the presser bar 69b, so that even if the presser bar 69 is deflected by the pressure, this is absorbed by the arcuate surface of the deflection absorbing member 80, and the pressure is kept constant.
is a click mechanism equipped with a ball that contacts the peripheral surface of the hexagonal head of the nut 74 and a spring member that presses this ball, and is configured to lightly stop the rotation of the nut 74 every time the nut 74 is rotated 60°. In addition, the reference numeral 82 in Fig. 2 denotes a spring member that is used when adjusting the phase of the claws 19, 20 and the suction head 58, and that lightly integrates the side plate 47 and the body body 31 so that they rotate together.

The operation of the double diameter barrel device configured as above will be explained. In the double-sided printing operation explained based on FIG.
When the trailing edge of the paper leaves the contact point between the cylinders 11 and 12, the rotary valve 55 comes into contact with the fixed valve 54, and the suction port 57 of the suction head 58 passes through the air passage 56, the main pipe 51, the communication hole 53, and the suction pipe 48. Since the atmosphere is sucked from the paper 30, the tail of the paper 30 is attracted to the suction port 57. As each cylinder further rotates, the cam follower 6
1 contacts the cam surface and rotates the roller lever 60 against the elastic force of the compression coil spring 66, so the suction pipe 48 rotates, the suction head 58 moves within the groove 59, and the paper 30 is rotated. make you nervous. In this state, when the trailing edge of the paper faces the claw B28 of the reversing cylinder 13, the claw B28 grips the trailing edge of the paper, the rotary valve 55 separates from the fixed valve 54, the suction stops, and the trailing edge of the paper is stopped by the suction head 58. Since it is solved, paper 30
is transported while being reversed. For other double-sided printing operations and single-sided printing operations, see Figures 3 and 4.
Since the above description has been made based on the figures, the explanation thereof will be omitted.

When switching between single-sided printing 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 direction of loosening, and the nut 74 will be fixed by the screw action of the screw member 73. axis 7
0 comes out of the screw member 73, so the presser foot 69b
The surface pressure caused by this is released, and the fixation between the side plate 47 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 47 becomes tangled, but the suction head When 58 reaches the predetermined position for single-sided printing or double-sided printing, the side plate 47 is stopped by a device (not shown), and only the cylinder body 31 rotates after this.
Stop at a position corresponding to the paper size. and,
When the nut 74 is rotated in the tightening direction, the fixed shaft 70 is screwed into the threaded hole of the screw member 73 due to the screw action of the screw member 73, so the presser bar 69 on the opposite side is pulled, and the presser bars on both sides are 69b is applied to the side plate 47 via the deflection deformation absorbing member 80, and the side plate 47 and the trunk body 31 are firmly fixed. In this case, by providing the deflection deformation absorbing member 80, even if the presser bar 69 bends due to excessive surface pressure, the deformation of the presser foot 69b is absorbed by the arcuate surface of the deflection deformation absorbing member 80. The presser foot 69b is not deformed and the surface pressure is always constant. Furthermore, even if the fixed shaft 70 may stretch due to a rise in temperature during operation, the provision of the disc spring 78 in this embodiment absorbs this stretch and loosens the fixation between the side plate 47 and the trunk body 31. There is no.

[Effect of idea]

As is clear from the above explanation, according to the present invention, in a sheet-fed printing press with a reversing mechanism, supporting members on both sides that support both ends of a shaft member on which a suction member is attached are attached to both end shafts of a double diameter cylinder. The shaft is rotatably fitted and its inner surface is attached to the end surface of the trunk body, and a shaft having a head and a threaded portion at both ends is provided to pass through the central shaft hole of the trunk body and both end shafts. At the same time, it diametrically penetrates the base of the shaft at both ends and is attached to the outer surface of the support member, and is moved by screwing the screw member into the threaded portion of the shaft, thereby fixing the support member and the trunk body by surface pressure. By providing the fixing member, the supporting member of the suction member can be fixed to the trunk body simply by rotating the screw member from outside the frame on one side, which is open around the frame. Workability is greatly improved compared to the old one, reducing labor and working time. Furthermore, by interposing a deflection deformation absorbing member for the fixing member by fitting the arcuate convex surface and the arcuate concave surface between the joining surfaces of the fixing member and the support member,
Since the bending deformation of the fixing member due to excessive surface pressure is absorbed by the arcuate surface, the fixing member will not be deformed and the surface pressure will always be constant.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the suction member fixing device for a sheet-fed printing press with a reversing mechanism according to the present invention,
Figure 1 is a vertical cross-sectional view of a double-diameter cylinder in which this has been implemented;
The figures are AA sectional view of Fig. 1, Fig. 3 is an enlarged sectional view of the surface pressure acting part, Fig. 4 is a cylinder arrangement diagram of a sheet-fed printing press with a reversing mechanism, shown to explain the single-sided printing operation, and Fig. 5 The figure is a cylinder layout diagram of a sheet-fed printing press with a reversing mechanism shown to explain the double-sided printing operation. 12... Double diameter barrel, 31... Torso body, 31c, 3
2c, 33b... shaft hole, 32, 33... end shaft, 3
6... Frame, 47... Side plate, 48... Intake pipe, 58... Suction head, 69... Presser bar, 69
b... Presser foot, 70... Fixed shaft, 73... Screw member, 74... Nut, 78... Belleville spring, 80...
Deflection deformation absorbing member.

Claims (1)

[Scope of utility model registration request] A torso body whose end shafts are supported by frames on both sides,
a pair of support members located inside the frame and supported by the respective end shafts; and a shaft member that axially penetrates the outer circumferential space of the trunk body and is supported between the support members on both sides. In a sheet-fed printing machine with a reversing mechanism having a plurality of suction members arranged in parallel with each other, the support members on both sides are rotatably fitted to the both end shafts, and the inner surface thereof A shaft attached to an end surface of the trunk body, having a head at one end and a threaded portion at the other end is provided so as to pass through a central shaft hole between the trunk body and both end shafts, and the shaft bases at both ends are provided. A fixing member is provided that penetrates in the diametrical direction and is attached to the outer surface of the support member, and moves when the screw member is screwed into the threaded portion to fix the support member and the trunk body by surface pressure, and the fixing member A suction member for a sheet-fed printing press with a reversing mechanism, characterized in that a deflection deformation absorbing member for the fixing member is interposed between the joining surfaces of the and the support member by fitting a convex circular surface and a concave circular surface. Fixation device.