JPS5941267A - Device for clamping gravure plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for clamping a plate to a plate cylinder of a sheet-fed gravure printing machine, the first end of the plate being wrapped around the edge of the cylinder groove so as to and in which the second end of the plate is crimped onto the end of said vein line 1 by means of a pivotable clamping member within the body groove.

This type of device is described in U.S. Patent No. 2157.
However, such a device as known from No. 621 is not suitable for clamping plates of different thicknesses and, moreover, is not suitable for clamping plates of different thicknesses, and also does not require the use of inclined cylinders, as is common in gravure printing presses. Not suitable for use in grooves.

Furthermore, the fact that the bell crank is used to operate the plate clamping device is disclosed in German Patent Application No. 280,430.
No. 4 is known.

The object of the present invention is to provide a device for clamping plates on the plate cylinder of a sheet-fed gravure printing machine in such a way that plates of different thicknesses can be clamped smoothly even in the case of inclined cylinder grooves. The goal is to improve.

In order to solve this problem, the present invention provides that the tightening member is pivotable by a bell crank supported in the body groove, and that the tightening member is guided in the member by a connecting rod of the bell crank. A bolt is connected in each case, which bolt is supported on the clamping member via a spring guided by these bolts, and furthermore, the connecting line between the two bearing points of the member is also connected to the shell. The surface of the clamping member is slightly deviated from parallel to the axis, so that the clamping member is positioned on the circumferential surface of the plate cylinder at both end positions of the pivoting movement of the member. . Tightening is achieved by arranging axes that rotate both ends of the member at different locations. Protruding from the circumferential surface or being undesirably located below the trunk circumferential surface is avoided. In particular, an open clamping means that the member protrudes over its length when viewed from one side, whereas the clamping means that the member protrudes below the trunk circumferential surface on the other side. The remaining problems can be avoided. Tightening is required when one side of the member protrudes from the body circumferential surface and the other side is located below the body circumferential surface.

A hollow space is formed between the plate and the clamping member, so that the plate cannot be clamped flatly and smoothly onto the plate cylinder. The arrangement of the bellcrank transmission with the connected connecting rod and spring element allows a reliable clamping and positioning of the plate.

The invention will be explained below with reference to the exemplary embodiments shown.

The partially shown plate cylinder 1 of a gravure printing press has a cylinder groove 2.
is provided, in which a device for tightening the plate 3 is arranged. Crank levers 5, 6 each with one bell crank 7.8 at each end of the shaft 4
is fixed. The shaft 4 is rotated by means of a hexagonal head 9 provided at the shaft end, and thereby the bell cranks 1, 8 are brought into the easily bridged position corresponding to FIG. Connecting rod 10, 1 of Velcla/ri 7, 8
1 in each case is connected to one bolt 12.13, the bolt extending over its entire width being guided in a bore 14.15 of the part 16. A bellows 17 is guided on each bolt 12, 13 and is supported on the one hand by a clamping member 16K and on the other hand by a bolt 12.13 connected to the connecting rods 1o, ii.

The ends of the part 16 are journalled by ball joints 18, 19, so that the connecting lines 20 are parallel to the greens 21 of the part 16, i.e. respectively relative to the plate cylinder axis. It can be arranged at an angle to the axis 22 of the shaft 4 lying parallel. Ball joint 18,1
The spatial arrangement of 9 is indicated in FIG. 1 by the center point 23.24. The tightening is apparent from FIG. 2 compared to FIG. 6 by the inclined position of the edge 21 of the member 16 and the corner 25° 26 of the member 16.

When tightening the plate 3, first make sure that the end 27 of the plate is in the body groove 2.
is placed wrapped around the left side edge 28 of the holder, and in some cases the slats are tightened by a rail 29.

The plate is then guided around the plate cylinder 1 to the other end 3
0 is similarly placed around the edge 21 of the member 16. For temporary fixation, a clamping rail 29 may be provided on the clamping member 16. In order to clamp the printing form 3, the shaft 4 is rotated, so that a clamping device position corresponding to FIG. 2 is obtained. In this case surface 31
are located precisely on the circumference of the form cylinder 1 in the two end positions corresponding to FIGS. 1 and 2, so that the form is positioned almost without space.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the device in a partially cutaway manner with the clamp shown in the open position; FIG. 2 is a schematic diagram showing the device in the closed position with the clamp corresponding to FIG. 1; 1 is a partially cut-away plan view of the clamping device shown in FIG. 1; FIG. 1... plate cylinder, 2... cylinder groove, 3... plate, 4 - shaft,
5, 6... Crank lever, 7, 8... Bell crank, 9... Hex head, 10, 11... Connecting rod, 12
・13... Bolt, 14, 15... Hole, 16... Tightening member, 17... Belleville spring, 18, 19... Ball joint, 20... Joining line, 21... Edge , 22... axis line,
23, 24... Center point, 25, 26... Corner, 27...
End, 28...Left side edge, 29...Tighten rail, 3
0 ・End, 31...Front, Procedural amendment (method) September 29, 1980 Mr. Commissioner of the Patent Office 1 Indication of case Patent Application No. 94208 of 1988 2,
Title of the invention Device for tightening gravure plates 3 Relationship with the case of the person making the amendment Patent applicant 4 Sub-agent 6 Drawings subject to amendment

Claims (1)

[Claims] Apparatus for clamping a plate onto a plate cylinder of a sheet-fed gravure printing machine, the first end of the plate being positioned wrapped around the edge of the cylinder groove, and the second end of the plate comprising: The clamp that can pivot within the torso groove is crimped onto the end of the vein line 1 by a member, and the clamp that grips the end of the vein line 2 is arranged such that the edge of the member is pressed against the end of the vein line 1 by means of a member. Corresponding to the inclined position, it is also arranged at an angle to the trunk axis and the vein line 2
In those of the type in which the ends are correspondingly bent and the said clamping is applied to the edge of the part, the clamping is carried out by means of bell cranks (7, 8) in which the part (16) is supported in the body groove (2). The connecting rod (10, 1
1), the tightening is performed in each case 1 guided in the member (16).
Two bolts (12, 13) are connected, and the bolts are supported by a member (16) for tightening via springs (17) guided by these bolts, and furthermore, the bolts are supported by a member (16) for tightening. ) of both bearing points (18, 19) connecting line (20
) again slightly deviates from parallel to the cylinder axis, so that the clamping is performed so that the surface (31) of the member (16) is clamped at both ends of the pivoting movement of the plate cylinder (1). A device for tightening a gravure plate, characterized in that it is positioned on the circumferential surface of the gravure plate.