JPS63145032A - Plate setting device in printing cylinder - Google Patents

Abstract

PURPOSE:To firmly fix one end of a plate between a long cam and a pawl mount bar by a simple action, by a method wherein a chamfered plane of the long cam is opposed to the pawl mount bar, and the bending end of the plate is inserted between the pawl mount bar and a cutout wall, and the long cam is rotated from the outside of a cylinder end plate. CONSTITUTION:In the state that a pawl mount bar 39 is set to a cutout wall 25b, a bending end 50a of a plate 50 is inserted into a gap (t), which is formed between the pawl mount bar 39 and the cutout wall 25b. At this time, if a chamfered plane 54a of a long cam 54 is opposed to the pawl mount bar 39, the bending end 50a is inserted along the plane 54a. After the insert of the bending end 50a, a tool is engaged with a hexagon head 59 of the long cam 54 to rotate the long cam 54 until a pin 61 abutting against a stopper 63 reaches to a stopper 65. In this manner, a circular surface 54b of the long cam 54 is opposed to the bending end 50a and the long cam 54 is pressed toward the pawl mount bar 39 by the elastic force of a belleville spring 57 and, therefore, the bending end 50a is securely fixed by being held surface of the pawl mount bar 39.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applied to a printing cylinder having a paper gripping claw installed in a notch around the cylinder, for protecting the cylinder peripheral surface and preventing paper stains. The present invention relates to a plate mounting device for a printing cylinder on which a plate is wound.

[Conventional technology]

Printing cylinders such as impression cylinders and transfer cylinders in rotary printing presses are equipped with metal plates on their circumferential surfaces to protect them from damage or to prevent paper from getting dirty during reverse printing. It may be wrapped. In this case, insert and fix the bent end of the plate between the claw in the notch around the body and the wall of the notch, which holds the paper in its mouth, and then attach this plate to the surface of the body. Conventionally, a structure has been generally used in which, after winding, the other end is fixed to a winding rod in a notch and tightened by rotating the winding rod.

5 to 7 are diagrams shown to explain the conventional method of attaching the plate on the notch wall side, in which FIG. 5 is a cross-sectional view of the plate fixing part, and FIG. 6 is a cross-sectional view of the nail base fixing part. FIG. 7 is a perspective view of the bent end of the plate. In the figure, the cutout wall fixing side end 1& of the plate 1 is bent in advance, and this end 1a is provided with a plurality of U-shaped fixing bolt holes 1a. . On the other hand, for example, the impression cylinder 2 is provided with a notch 2a over the entire length of the cylinder 2 for attaching a claw (not shown), and one end of the plate 1 is provided with the notch 2a as described above.
After being fixed to the winding rod in a and wrapped around the torso,
The end 1a is guided to the end of the notch 2a on the side opposite to the winding rod. A nail rest bar 3 extending the entire length of the body is fixed to the stepped wall surface 2b on this side with a plurality of bolts 4, and a plurality of notches 4 are provided in parallel to this nail rest bar 3. In, L
A nail base 5 formed in a letter shape is fixed with a bolt 6.

Note that a gap T is formed between the upper half of the nail rest bar 3 and the wall surface 2b, and the bolt 6 ends before the gap 7 and does not reach the wall surface 2b. Further, a plurality of screw holes 8 are provided in the wall surface 2b at positions that do not correspond to the nail rests 5.

Due to this structure, when fixing the end 1a of the plate 1, the end 1a is inserted into the gap T of the wall surface 2b to which the nail rest bar 3 with the nail rest 5 attached is fixed. is inserted to match the bolt hole 1 with the screw hole 8, and the bolt 9 is inserted from the hole 3b side provided in the nail base bar 3 to screw into the screw hole 8.
By screwing into the spacer 10 and the washer 11, the end portion 1a is fixed with the bolt 9.

[Problem that the invention seeks to solve]

However, in such a conventional plate mounting device, when mounting or removing the plate 1, it is necessary to loosen and tighten a large number of ports 9, etc. that fix the end portion 1&, which requires a lot of effort. It is labor-intensive and time-consuming, and the bolt holes 1b of the plate 1 have to be machined, resulting in a large number of holes 3.
Since the machining of b and the screw hole 8 is dangerous, there is a problem in that it is troublesome and the machining cost increases.

[Failure to solve the problem]

In order to solve these problems, the present invention provides a gap between the notch wall surface on which the nail rest bar is attached and the nail rest bar, in which the bent end of the plate can be inserted after the nail rest bar is attached. A recessed hole that opens toward the bent end and extends in the axial direction of the body is provided on the side opposite to the claw base bar of the bent end that is formed and inserted into this gap, and the bent end is inserted into the recessed hole. A rod-shaped cam for fixing the bent end having a multi-faceted chamfer that allows for the bending is supported by both end plates so that it can rotate freely and extend freely in the direction of distance from and near the claw rest bar, and the opposite claw rest bar of this rod-shaped cam A compression spring member was inserted on the side.

[Effect]

With the chamfered multi-plane surface of the rod-shaped cam facing the claw rest bar side, insert the bent end of the plate between the claw rest bar and the notch wall surface, and rotate the rod-shaped cam from outside the body end plate. Then, the arcuate surface of the rod-shaped cam faces the insertion bent end, so the bent end is connected to the arcuate surface of the rod-shaped cam that moves in one direction of the claw rest bar in the recessed hole by the elastic force of the compression spring member. It is firmly clamped and fixed between the

〔Example〕

1 to 4 show an example in which the printing cylinder plate mounting device according to the present invention is implemented on an impression cylinder of a printing press, and FIG. 1 is a partially cutaway perspective view of the impression cylinder in which this is implemented, and 3 is a side view of the driving side, and FIG. 4 is a side view of the operating side. In the figure, the impression cylinder 20 includes a cylindrical cylinder main body 21 which is appropriately cast, bearers 22 and 23 as cylinder end plates at both ends formed in a disc shape, and shafts 24 at both ends supported by a frame. A notch 25 is provided on the outer circumference of the barrel body 21 over the entire length of the barrel. Bearings 26 and 27 are fixed concentrically to the portions of the bearers 22 and 23 corresponding to the notches 25, respectively.
A plurality of bearings 28 are fixed in parallel at predetermined intervals. A hollow pawl shaft 29 is rotatably supported on these bearings 26, 27, and 28.
A plurality of claws 30 are fixedly fixed on the top 9 at predetermined intervals. Note that the claw 30 is composed of a holder, a claw body, etc., but the entire claw will be referred to as a claw, and a detailed explanation thereof will be omitted. A cam lever 32 with a cam follower 31 pivotally attached to its free end is fixed to the protruding end of the pawl shaft 29 from the bearing 26, and the cam follower 31 is attached to the cam surface of a cam 33 fixed to the frame side. are facing each other. Furthermore, the claw shaft 29
A bushing 34 having a hexagonal recessed hole is integrally fitted into the side end of the cam lever 32, and a torsion bushing 34 provided through the hollow hole of the pawl shaft 29 is inserted into the hexagonal recessed hole. The hexagonal head of the bar 35 is fitted. Further, a torsion bar holder 36 is fixed to the outer surface of the bearer 23 by fitting a boss portion into a circular hole of the bearer 23 and engaging a bolt 37 and an elongated hole 38.
The other hexagonal head of the torsion bar 35 is fitted into the hexagonal hole 6 and fixed by split tightening. Then, by rotating and fixing the torsion bar holder 36 to the torsion bar 35, the cam follower 31 is attached to the cam 33.
A spring force is accumulated in the direction of pressing the pawl 30 against the cam surface of the pawl 30, and a counterclockwise rotating force in FIG. 2 is applied to the pawl 30. With this configuration, when the impression cylinder 20 rotates and the cam follower 31 climbs the upper inclined surface of the cam 33, the pawl shaft 29 resists the screw spring force of the torsion bar 35 and moves as shown in FIG. When the cam follower 31 moves down the lower inclined surface of the cam 33, the claw 3a closes against a claw base 41, which will be described later. Opens with 35 spring force.

On the other hand, a nail rest bar 39 extending almost the entire length of the notch 25 is fixed to the wall surface 25b with bolts 40, and a plurality of nail rests 41 formed in an L-shape are attached to the stepped part. winter melon 3
It is fixed with a bolt 42 corresponding to 0. As a result of fixing the nail rest bar 39 with the bolt 40, the nail rest bar 39
A gap for inserting a plate is formed between the cutout wall surface 25b and the notch wall surface 25b, which is indicated by the symbol t in FIG.

Therefore, the plate mounting device will be explained. The plate 50 attached to the circumferential surface of the impression cylinder 20 has a bent end 50m at one end, which is bent approximately at right angles, and this bent end 50a has a cylindrical shape as shown by the reference numeral 1b in FIG. There are no proper bolt holes. This bent end 50a is inserted into the gap t, and on the opposite side of the inserted bent end 5010 to the claw rest bar 39, there is a recessed hole 51 with a square cross section that opens toward the claw rest bar 39 side. The bearers 22, 23 on both sides are provided along the entire length of the bearing 21, and shaft holes 52, 53 corresponding to the recessed holes 51 are bored therein, respectively. 5
Reference numeral 4 denotes a rod-shaped cam which penetrates the entire length of the concave hole 51 and is rotatably supported at both ends in shaft holes 52 and 53 so as to be slightly movable in the distance direction with respect to the pawl base bar 39. A chamfered flat surface 54a is formed over the entire length of the recessed hole 51 to allow insertion of the bent end 50a. Then, the rod-shaped cam 54 is rotated approximately 900 times from the state shown in FIG. 2 so that the arcuate surface 54b faces the bent end.
The bent end 50m is configured to be pressed between the claw base bar and the arcuate surface 54b. Furthermore, a circular hole 55 is bored at the bottom side of the concave hole 51 to communicate with the concave hole 51.
A washer 56 and a plurality of disc springs 57 are loaded inside, and a plate 58 made of a spring and extending in the axial direction of the cylinder is provided at the boundary between the circular hole 55 and the recessed hole 51. . As a result, the rod-shaped cam 54 is moved to the claw base bar 39 by the disc spring 5T.
direction, the bent end 50m is clamped and fixed even more firmly, and the rod-shaped cam 54 is pressed by the plate 58.
wear is prevented. The rod-shaped cam 54 has a hexagonal head 59.60 for holding a tool as a rotating means for the rod-shaped cam 54.
are formed on the protrusions from the bearers 22 and 23, respectively. 81.62 is a pin protruding from the hexagonal head 59°60, and 63.64 and 65°66 are the bearers 22, 2.
3 is a stopper which is provided in a protruding manner to restrict both ends of rotation of the rod-shaped cam 54 by abutting the pins 61 and 62 at the solid line position and the chain line position, respectively.

The plate 5 with its bent end 50m fixed in this way
0 is wound around the impression cylinder 20 and led to the notch 25, and then the other end is fixed, so this fixing device will be explained below. A bearing 7 is provided on the outer surface of each bearer 22 and 23 on both sides.
0.71 are fixed concentrically to each other corresponding to the ends of the notches 25 on the bar shaft side, and a winding rod 72 is rotatably supported on these bearings 70 and 71. There is. and,
A chamfered flat surface 72& is formed on a part of the circumferential surface of the winding rod 72, and one end of the plate 50 is inserted into the bolt hole 73 and screwed into the screw hole of the chamfered multi-plane 72m. Fixed by A worm wheel 74 is mounted on the protruding end of the winding rod 72 from the bearing 71 and fixed with a key and bolts 75 (not shown), and a bearing portion of a bracket T6 bolted to the outer surface of the bearer 23. A worm 7 which engages with the worm wheel T4 is rotatably supported on both end shaft portions. On the end shaft of the worm 76,
A hexagonal head 77 for holding the tool is integrally formed, and a click spring member 78 that engages and elastically holds each side of the hexagonal head 7T is screwed to the bracket 7h. .

With this configuration, when the plate 50 is fixed to the winding rod 72 and then the tool is engaged with the hexagonal head 77 and rotated, the winding rod is moved by the engagement between the worm 76 and the worm wheel 74. γ2 rotates and the plate 50 is tightened so as to come into close contact with the circumferential surface of the torso.

The operation of the plate mounting device configured as above will be explained. When the nail rest bar 39 is attached to the notch wall surface 25b, a gap t is formed between the nail rest bar 39 and the notch wall surface 25b. Insert. At this time, if the chamfered multi-plane 54m of the rod-shaped cam 54 is opposed to the claw base bar 39, the bent end 50& is inserted along the plane 54m. After inserting the bent end 50a in this way,
When a tool is engaged with the square head 59 or 60 of the rod-shaped cam 5406 and rotated until the pin 61.62 that was in contact with the stopper 63.64 comes into contact with the stopper 65.66, the rod-shaped cam 5
4 is opposed to the bent end 50a, and the rod-shaped cam 54 is urged toward the claw base bar 39 by the elastic force of the disc spring 57, so the bent end 50m is opposed to the arced face 54b and the claw rest. It is firmly fixed by being pinched with the surface of the bar 39. Therefore, the plate 50 is wrapped around the circumferential surface of the impression cylinder 20 and the notch 25 is formed.
After guiding the winding rod 720 to the chamfered surface 72m and fixing it with the bolt 73, a tool is engaged with the hexagonal head 75 and rotated, and the winding rod 72 is engaged with the worm 76 and the worm wheel 74. rotates, so that the plate 50 is tightened in close contact with the circumferential surface of the torso. Worm 76 and Worm foil T
Because it meshes with plate 4, it does not reverse, and plate 5
0 does not slacken.

When the impression cylinder 20 on which the plate 50 is attached rotates in this manner, the cam follower 31 passes over the peak of the cam 33, and the pawl 30 opens and closes in cooperation with the torsion bar 35, and the pawl 30 opens and closes between the pawl base 41 and the cam follower 31. I put a piece of paper in my mouth and release it. When the plate 50 is to be removed, it can be easily removed by performing a reverse operation during installation. When attaching and detaching the plate 50 like this, the nail rest 41 and the nail rest bar 3 are
9 is up to the attached t, so accuracy is maintained.

When inserting the bent end 50m, hold it by pressing the bent corner of the plate 50 by screwing a bar-shaped holding jig to the sides of the bearers 22 and 23 on both sides, and then It is desirable to carry out this work. Also,
A conventional plate bending machine can be used to bend the plate 50, and there is no need to provide bolt holes at the bent end SOA K of the plate 50.

Although this embodiment shows an example in which the present invention is applied to an impression cylinder, any printing cylinder equipped with a pawl and a pawl stand in a notch, such as a transfer cylinder or a blanket cylinder of a double-sided printing press, may be used. All can be implemented in the same way.

〔Effect of the invention〕

As is clear from the above description, in the printing cylinder plate mounting device according to the present invention, the nail rest bar is mounted between the nail rest bar and the cylinder peripheral notch wall surface on which the nail rest bar is mounted. A gap is formed into which the bent end of the plate can be inserted later, and a concave hole is provided on the bar side of the bent end to be inserted into the gap, and opens toward the bent end side and extends in the axial direction of the body. A rod-shaped cam for fixing the bent end, which has a chamfered multi-plane surface that allows insertion of the bent end into the recessed hole, is supported by both end plates, and is rotatably extended so as to be freely movable in the distance direction relative to the claw base bar. In particular, the plate can be removed by simply inserting the bent end of the plate between the claw base bar and the chamfered multi-plane and rotating the bar-shaped cam to a position where the arcuate surface faces the inserted bent end. Since the leakage can be firmly fixed between the rod-shaped cam and the claw base bar by the action of the circular arc surface of the rod-shaped cam and the compression spring member, the labor for attaching the plate is greatly reduced and work efficiency is improved. In addition, there is no need to provide bolt holes at the bent end of the plate, reducing processing costs. In addition, since the plate can be attached and removed while the nail rest and the nail rest bar are attached, gripping accuracy can be maintained regardless of whether the plate is attached or removed.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the printing cylinder plate mounting device according to the present invention, FIG. 1 is a partially cutaway perspective view of an impression cylinder in which this is implemented, FIG. 2 is a side sectional view, Figure 3 is a side view of the driving side, Figure 4 is a side view of the operating side,
5 to 7 are diagrams shown to explain the conventional method of attaching the plate on the notch wall side, in which FIG. 5 is a cross-sectional view of the plate fixing part, and FIG. 6 is a cross-sectional view of the nail base fixing part. FIG. 7 is a perspective view of the bent end of the plate. 20...impression cylinder, 21...-cylinder body, 22°23.
・・Exposed bearer, 25・・Notch, 25b・・Wall surface, 39・Work/counter nail stand bar, 40・・War bolt, 41
...Claw base, 42...Port, 50h--Plate, 50Jl...Bent end, 51...Concave hole,
54...rod-shaped cam, 54m...chamfered plane, 5
4b... Arc surface, 55... - same hole, 57...
Disc spring, t...gap.

Claims (1)

[Claims] In a plate mounting device for a printing cylinder that inserts and fixes a bent end of a plate between an outer circumferential notch wall surface of a printing cylinder and a nail rest bar attached to this wall surface, the space between the wall surface and the nail rest bar is fixed. After installing this nail rest bar, a gap is formed into which the bent end can be inserted, and the bent end inserted into this gap is opened on the side opposite to the nail rest bar, and is opened on the bent end side and extends in the axial direction of the body. An extending concave hole is provided, and in this concave hole, a rod-shaped cam for fixing the bent end having a chamfered plane that allows the insertion of the bent end is supported by both end plates so as to be rotatable in the distance direction with respect to the nail rest bar. A plate mounting device for a printing cylinder, characterized in that the plate mounting device is movably extended, and a compression spring member is interposed on the opposite side of the rod-shaped cam from the claw base bar.