JP2008238523A - Press plate clamping device of plate cylinder for rotary press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To install press plates having even their bent forms and sizes different from one another. <P>SOLUTION: In the press plate clamping device of a plate cylinder for a rotary press, in which the gripping tail 22a of the press plate 22 with its gripping side hooked to one edge 7b of a groove hole 3 axially provided near the surface of a plate cylinder 1 is hooked to the grippers of a gripper bar 8 protrusively provided with the grippers on its side normal to its axis by inserting the gripper bar 8 in the groove hole 3 so as to pivotingly fix the gripper bar towards a direction for pulling in the gripping tail, both the end parts of the gripper bar 8 is supported by an eccentric bearing 9, which is made pivotable towards the plate cylinder 1 side and, at the same time, fixable towards the pivoting direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a plate clamping device for a plate cylinder for a rotary press.

  This type of printing plate clamping device for a printing press cylinder is configured as shown in FIG. 6, and a clamp bar c inserted into a slot b of the printing drum a is formed into a bowl shape by a leaf spring. The claw d is fixed and the holding edge g of the printing plate f inserted from the groove e is hooked by the clamp claw d, and then the clamp bar c is clamped by a clamp operating device (not shown) using a toggle mechanism (see FIG. It can be clamped by turning in the middle left rotation direction. At this time, the holding portion h of the printing plate f is pressed against the holding side wall surface of the groove e by a part of the clamp bar c. The clamp pawl d may be formed integrally with the clamp bar c.

  In order to stably mount the printing plate f on the plate cylinder a, the holding portion h of the printing plate f is pressed so as not to float on the holding side wall surface of the groove e, and the printing plate f is clamped by the clamping claw d. It is an important condition that the pull-in amount is set appropriately.

  Therefore, in the conventional plate clamping device, the clamp operating device for rotating the clamp bar c has a stopper for setting the rotation range on both sides in the operation direction of the clamp arm of the toggle mechanism. It is provided as possible (see, for example, Patent Document 1).

JP-A-9-66599

  In the conventional printing plate clamping device, when the length of the gripping edge g of the printing plate f is longer than that shown in FIG. 6 as shown in FIG. 7, the above-described stopper in the clamping direction is adjusted. Then, when the clamp bar c is rotated so that the gripping edge g of the printing plate f is sufficiently pulled, the rotation angle of the clamp bar c is large, so that the clamping bar c can press the holding portion h of the printing plate f. This results in a problem that it is out of the range, and it is not possible to hold down this portion by the clamp bar c.

  Further, in the above-described conventional technique, the adjustment of the rotation range in the clamp operation direction is performed by adjusting the protruding length of the stopper that determines the stroke in the rotation direction of the toggle mechanism. The adjustment stroke could not be made too large, and the adjustment range in the operating direction was inevitably narrowed.

  The present invention has been made in view of the above, and even if the bending shape and dimensions of the printing plate are different, the printing plate can be mounted without hindering printing, and the shape and size of the gripper can be changed. Even so, it is an object of the present invention to provide a printing plate clamping device for a rotary press capable of pressing the gripping portion together with the gripping butt.

  In order to achieve the above object, the device of the present invention inserts a clamp bar having a clamp claw projecting on the side surface perpendicular to the axis into a slot provided in the axial direction near the surface of the plate cylinder. A press plate of a plate cylinder for a rotary press in which a holding end of a printing plate hooked on an edge is hooked on a clamp claw of the clamp bar and the clamp bar is rotated and fixed in a direction in which the holding end is pulled. In the clamp device, both ends of the clamp bar are supported by eccentric bearings that can be rotated to the plate cylinder side and can be fixed in the rotation direction.

  In the above configuration, the gripper edge and the gripper portion of the printing plate are placed along the one side wall surface of the slot, and the gripper buttocks and the gripper portion are pressed against the gripper side wall surface by a clamp claw that pulls the gripper bottom. .

  Further, a worm wheel is provided concentrically with the rotational axis O of the eccentric bearing in the above configuration, a worm meshing with the worm wheel is provided on the plate cylinder so as to be rotatable from the outside, and the worm is rotated. The eccentric bearing is rotated through the worm wheel, and the axis of the clamp bar supported by the eccentric bearing is changed.

  According to the present invention, the rotational axis of the clamp bar can be changed in the slot by rotating the eccentric bearing, and the clamp operation locus of the clamp pawl fixed to the clamp bar can be changed. In addition, by changing the rotation axis of the clamp bar, it is possible to mount a printing plate having a different bending shape or size of the gripper butto the plate cylinder without any trouble in printing.

  From the above, it is possible to cope with the specifications of a plurality of printing plate bending apparatuses with a printing plate clamping apparatus having a standard structure over a wide range, and it is possible to improve cost reduction effect and maintainability by standardization.

  In the configuration according to claim 2 of the present invention, the clamp claw that clamps the gripping butt having different bending shapes and dimensions as described above can overlap the gripping part together with the gripping butt and press the gripping part on the side wall surface. As a result, it is possible to perform clamping without releasing the pressing into the holding portion in spite of a change in the shape and size of the holding edge of the printing plate.

  According to the third aspect of the present invention, the rotation axis of the clamp bar can be changed by the worm mechanism, so that the rotation axis can be easily displaced over a minute range. it can. Even if there is a minute precision deflection characteristic that the individual plate bending machines have, this deflection characteristic can be offset by adjusting the winding position with the worm mechanism, and printing can be performed in a stable state with high precision. A plate can be installed.

  In addition, even if there is a change in the amount of penetration of the plate bottom end into the slot when changing the cylinder tailoring, it can be adjusted by minutely changing the axis of the clamp bar, resulting in high accuracy. A stable plate can be mounted.

  Further, according to the present invention, the adjustment of the rotation range of the clamp bar in the crank operating direction can be performed by the fluctuation of the rotation axis of the clamp bar, thereby adjusting the rotation range over a wide range. it can.

  An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, 1 is a plate cylinder, and 2 is a bearer fixed to both ends of the plate cylinder 1. Reference numeral 3 denotes a slot provided in the axial direction near the surface of the plate cylinder 1. The cross-sectional shape of the slot 3 is a groove 4 opening on the surface of the plate cylinder 1 as shown in FIG. A clamp bar receiving portion 5 having a circular arc bottom, and a side wall surface 7a in which both sides from the both sides of the clamp bar receiving portion 5 to the edge portions 6a and 6b which are the edges of the groove 4 are symmetrically tapered. , 7b.

  Reference numeral 8 denotes a clamp bar that is inserted into the slot 3, and both ends of the clamp bar 8 are supported by the bearer 2 via eccentric bearings 9, and the tip of the clamp bar 8 that protrudes from the bearer 2 A clamp operating device 10 provided on the outer surface of the bearer 2 is connected.

  Since the configuration of both ends of the clamp bar 8 is the same configuration symmetrical in the axial direction, one side (the prime mover side) will be described.

The eccentric bearing 9 is rotatably fitted to the bearer 2. The center O ₁ of the eccentric bearing hole 9 a that rotatably supports the end of the clamp bar 8 is eccentric by R with respect to the rotation center O. The eccentric bearing 9 is integrally provided with a worm wheel 11 through which the end of the clamp bar 8 penetrates in the axial direction. The outer diameter portion of the worm wheel 11 is concentric with the rotational axis O of the eccentric bearing 9.

The eccentric direction of the axis O ₁ of the bearing hole 9a for turning axis O of the eccentric bearing 9, Figure 2, as shown in FIG. 3, one of the added side slots 3 relative to pivot axis O It is on the side of the wall surface 7b, and on the side of the holding action by the claw portion 21a of the clamp claw 21 described later.

  The worm wheel 11 is positioned inside the bearer 2, and the worm 12 meshing with the worm wheel 11 is embedded in the plate cylinder 1 as shown in FIG. The worm 12 is rotatably inserted into a hole 13 provided in the plate cylinder 1 and is supported by a retaining ring member 14 in the removal direction. The end face of the worm 12 is provided with a hexagonal hole 15 so that the hexagonal hole wrench can be engaged with the hexagonal hole 15 and rotated. A cover 16 is detachably mounted on the outer end face side of the worm 12 with a bolt 17. Normally, the cover 16 is mounted to prevent intrusion of ink or the like into this portion.

  The clamp bar actuating device 10 that rotates the clamp bar 8 is a known one that is substantially the same as that described in the above-mentioned Patent Document 1. As shown in FIGS. The clamp arm 18 is fixed to the tip, and a toggle device 19 that rotates the clamp arm 18 against a clamping position and an unclamping position against a spring force. The toggle device 19 is rotated by engaging the tip of the lever 20 in an engagement hole provided in the clamp arm 18 and rotating the lever 20. A stopper 18a for determining a rotation range in the clamping direction is provided on the clamp operating side of the clamp arm 18. The stopper 18a is a screw and can be adjusted. This stopper 18a may also be provided on the unclamp side.

  Clamps 21 claws are fixed to a plurality of positions of the clamp bar 8 in the axial direction. In FIG. 2, the clamp bar 8 is clamped (rotated in the clockwise direction). The gripper 22a is engaged and pulled in the clamping direction, and the gripper 22b is pressed against the gripper side wall surface 7b so as to overlap with the gripper 22a.

  The operation of mounting the printing plate 22 on the plate cylinder 1 using the printing plate clamping apparatus having the above configuration will be described below.

  The plate 22 is inserted into the slot 3 with the neck portion 22b and hooked on one edge 6b along the side surface 7b. Thereafter, the plate cylinder 1 is rotated once to bring the printing plate 22 along the surface of the plate cylinder 1, and this wedge edge 22 a is inserted into the slot 3. At this time, the holding butt 22a is inserted in a direction along the holding portion 22b, as in the conventional example shown in FIG. At this time, the clamp actuating device 10 is rotated counterclockwise in FIG. 4 to keep the clamp bar 8 in an unclamped state. The clamp operating device 10 is rotated by a lever 20 whose tip is engaged with an engagement hole provided in the clamp arm 18. The unclamping posture of the clamp arm 18 is held by the toggle device 19.

In the state described above, the lever 20 is rotated in the direction opposite to the unclamping operation direction, and the clamp arm 18 is rotated to the clamped state. As a result, the clamp bar 8 rotates in the clamping direction, that is, in the clockwise rotation direction in FIG. 2, and the gripping butt 22a is pulled in by the claw portion 21a of the clamping claw 21 fixed to the clamping bar 8. This clamped state is held by the toggle device 19. At this time, the clamp bar 8 rotates around the eccentric axis O ₁ of the eccentric bearing 9.

Clamping bar 8 and the clamping claw 21 shown by the solid line in FIG. 2, although this rotational center as described above is a case where a position axis O ₁ is shown in FIG. 2 of the eccentric bearing hole 9a, If the state indicated by the solid line is, for example, a clamped state in the operation of the clamp operating device 10, the claw portion 21a of the gripper claw 21 is formed on the gripper buttocks 22a in spite of the clamped state as shown in the figure. It is not engaged and this is not a clamped state. This is due to the length of the holding edge 22b of the printing plate 22 being long with respect to the clamp rotation angle of the clamp bar 8.

In such a case, the eccentric bearing 9 is rotated clockwise in FIG. 2, and the axis O ₁ of the eccentric bearing hole 9 a is moved to the back side of the slot 3. As a result, the axial center of the clamp bar 8 is moved to the back side of the slot 3, and the clamp pawl 22 fixed thereto is also moved to the back side of the slot 3.

The state indicated by the chain line in FIG. 2 is the above state, and the axis of the clamp bar 8 is moved from O ₁ to O ₂ . Clamp bar 8 by clamping operation of the clamp actuator 10 again in this state is rotated around the axis O _2, the claw portion 21a of the clamp jaws 21 is engaged with the butt 22a added. In this state, the gripping butt 22 and the gripping portion 22a are overlapped at the tip of the clamp claw 21, and the gripper is pressed onto one gripping side wall surface 7b.

  The axial center of the clamp bar 8 is moved by rotating the worm 12 and rotating the eccentric bearing 9 via the worm wheel 11 meshed therewith.

That is, the cover 1b fixed to the end face of the worm 12 is removed, the worm 12 is rotated by a hexagonal bar wrench engaged with the hexagon hole 15 of the worm 12, and the worm wheel 11 is rotated clockwise in FIG. To do. As a result, the axis O ₁ of the clamp bar 8 in FIG. 3 is moved along the eccentric radius of the eccentric bearing 9 to the back side of the slot 3, for example, to the position O ₂ shown in FIG. The amount of rotation of the worm wheel 11 by the worm 12 at this time is set in accordance with the positional relationship between the clamp pawl 21 and the gripper butt 22a. When the worm wheel 11 is rotated at a predetermined angle, the cover 16 is fixed to the worm 12 and the hole 13 in which the worm 12 is fitted is closed. Although not particularly shown in this setting, the worm 12 and / or the worm wheel 11 may be fixed with a push screw or the like.

  In the above embodiment, the gripping butt 22a is longer than the standard, but when this is shorter than the standard, the eccentric bearing 9 is rotated in the opposite direction to the above, and the clamp position of the clamp claw 21 of the clamp bar 8 is reached. Is adjusted to the holding butt 22a at this time.

As described above, the clamp bar 8 is supported by the eccentric bearing 9, and by rotating the eccentric bearing 9, the axis O ₁ of the eccentric shaft hole 9 a of the clamp bar 8 becomes the rotation axis O of the eccentric bearing 9. On the other hand, the clamp claw 21 moves in a circular arc shape in the radial direction of the plate cylinder 1 on the claw portion 21a side. In the above-described embodiment, the example in which the worm mechanism including the worm wheel 11 and the worm 12 is used as the means for rotating the eccentric bearing 9, but the means for rotating the eccentric bearing 9 is not limited thereto. For example, a tool engaging portion for engaging a tool such as a spanner is provided on the outer peripheral portion of the eccentric bearing 9, and a tool such as a spanner is engaged with the eccentric bearing 9 to rotate over a predetermined angle. May be fixed.

In the above configuration, the operating length of the toggle device 19 in the clamp operating device 10 is changed by the movement of the axis O ₁ of the clamp bar 8 by the eccentric bearing 9, but this is absorbed by the toggle device 19.

It is a partially broken sectional view showing an embodiment of the present invention. It is an expanded sectional view which follows the AA line of FIG. It is an expanded sectional view which follows the BB line of FIG. It is a front view which shows a clamp actuator part. It is a partially broken top view which shows a clamp actuator part. It is sectional drawing which shows a prior art example. It is sectional drawing which shows the malfunction state of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Plate cylinder, 2 ... Bearer, 3 ... Shaft hole, 4 ... Groove, 5 ... Clamp bar receiving part, 6a, 6b ... Edge part, 7a, 7b ... Mouth side wall surface, 8 ... Clamp bar, 9 ... Eccentric bearing, 9a ... bearing hole, 10 ... clamp actuator, 11 ... worm wheel, 12 ... worm, 13 ... hole, 14 ... retaining ring member, 15 ... hexagonal hole, 16 ... cover, 17 ... bolt, 18 ... clamp arm, 18a ... Stopper, 19 ... Toggle device, 20 ... Lever, 21 ... Clamp claw, 21a ... Claw part, 22 ... Printing plate, 22a ... Mouth end, 22b ... Mouth part.

Claims (3)

Insert a clamp bar with a clamp claw projecting from the side perpendicular to the axis into the slot provided in the axial direction near the surface of the plate cylinder, and hold the holding edge of the printing plate with the holding side hooked on one edge of the slot In the plate clamping device of the plate cylinder for a rotary press, which is hooked on the clamp claw of the clamp bar, and the clamp bar is rotated and fixed in the direction in which the gripper is pulled.
A plate clamping device for a plate cylinder for a rotary press, characterized in that both ends of the clamp bar are supported by eccentric bearings that are rotatable to the plate cylinder side and fixed in the rotation direction.   The holding edge and the holding part of the printing plate are aligned with the side wall surface of one of the slots, and the holding edge and the holding part are pressed against the side wall surface by a clamp claw that pulls the holding edge. 2. A plate clamping device for a plate cylinder for a rotary press according to claim 1.   A worm wheel is provided on the eccentric bearing so as to be concentric with the rotational axis O, and a worm meshing with the worm wheel is provided on the plate cylinder so as to be rotatable from the outside. 3. The printing plate for a rotary cylinder according to claim 1, wherein the eccentric bearing is rotated to change the axis of the clamp bar supported by the eccentric bearing. Clamping device.

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