JPH0829356B2 - Mold holder for press brake - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold holder that detachably supports an upper mold in a press brake, and more particularly to a mold holder that enables easy mounting of the upper mold.

[0002]

2. Description of the Related Art Conventionally, when mounting an upper die on an upper table in a press brake, a large number of upper die holders are attached to the lower portion of the upper table, and the upper die is supported by the large number of upper die holders.

A conventional upper die holder has a structure in which a holder plate attached to an upper table in a press brake is provided with a pressing fixing member for pressing and fixing the upper portion of the upper die to the holder plate. The upper die pressing and fixing by the pressing and fixing member is configured such that the pressing and fixing member is tightened and fixed by a plurality of tightening bolts screwed to the holder plate, or the pressing and fixing member is attached by an air cylinder or the like mounted on the holder plate. Is a configuration that operates.

[0004]

Therefore, in the structure for tightening the pressure fixing member with the tightening bolt,
When the upper die is attached / detached and replaced, the fastening bolts in a large number of upper die holders mounted on the upper table have to be operated, and there is a problem that the upper die is attached / detached and replaced.

Further, in the structure in which the pressing and fixing member is operated by an air cylinder or the like, piping is required for each cylinder in many upper die holders mounted on the upper table, and a pressure source is required, so that the entire structure is required. There is a problem that the configuration becomes expensive.

[0006]

In view of the above problems, the present invention provides a holder plate attached to an upper table of a press brake with an actuating member which is lifted in association with a relative lift of an upper die. It is provided so as to be movable up and down, and is provided with a pressing fixing member for pressing and fixing the upper die to the operating member or the holder plate side in conjunction with the raising operation of the operating member.

[0007]

With the above construction, when the upper die is brought into contact with the operating member provided on the holder plate so as to be movable up and down in order to mount the upper die on the upper table in the press brake, the operating member is raised. The pressing and fixing member that is interlocked with operates to press and fix the upper die to the operating member or the holder plate.

Therefore, the upper die can be easily attached to the upper table.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a mold holder 1 according to this embodiment is mounted on a lower portion of an upper table 3 of a press brake (not shown) so as to be vertically adjustable via a mounting tool 5. There is.

More specifically, a support plate 7 is mounted on the front surface of the upper table 3 through the attachment 5 so as to be adjustable in the vertical direction, and a holder plate 9 having an L-shaped cross section is provided on the lower rear surface of the support plate 7. Are integrally attached by a plurality of bolts 11. A wedge member 13 for vertically adjusting the mold holder 1 is interposed between the upper surface of the holder plate 9 and the lower surface of the upper table 3.

The holder plate 9 is provided with an actuating member 15 which is raised in association with the relative rise of the upper die P, and the upper die P is interlocked with the raising operation of the actuating member 15. A pressing fixing member 17 for pressing and fixing the above-mentioned to the operating member 15 or the holder plate 9 is attached.

More specifically, the operating member 15 has a plate-like shape and is arranged in front of the holder plate 9. The operating member 15 has a substantially central portion in the longitudinal direction (left-right direction). The cam surface 15C is formed so as to be inclined so that the upper side is thin. Further, vertical holes 15H are formed near the left and right sides of the operating member 15.

The pressing and fixing member 17 is the operating member 1
5 is arranged so as to face the front side (left side in FIG. 1). Then, a plurality of mounting bolts 1 fixed to the holder plate 9 by penetrating a plurality of holes 17H provided in the pressure fixing member 17 and penetrating a long hole 15H of the actuating member 15.
The actuating member 15 and the pressing fixing member 17 are supported by the holder plate 9 by means of 9.

The pressing and fixing member 17 is supported by a spherical washer 21 between it and the head portion 19H of the mounting bolt 19 so as to be slightly swingable in the front-rear direction (left-right direction in FIG. 1). There is. A coil spring 22 is wound around the mounting bolt 19 so as to separate the pressing and fixing member 17 from the actuating member 15. Therefore, the operating member 15 and the pressing fixing member 17
It is always kept open between the lower end of the and.

A projecting portion 17P projecting in the direction of the cam surface 15C is formed at a portion of the pressing and fixing member 17 facing the cam surface 15C of the actuating member 15, and the projecting portion 17P has the cam surface. A sliding piece 23 that slidably contacts 15C is slidably supported.

The sliding piece 23 is connected to the cam surface 1 of the operating member 15.
In order to press to 5C, in the large-diameter hole 17BH formed in the protruding portion 17P of the pressing fixing member 17, the pressing force urged by a strong elastic member 25 such as a coil spring, disc spring or urethane rubber is applied. A biasing member 27 is internally provided, and the pressing biasing member 27 is in contact with the sliding piece 23.

The pressing urging member 27 is composed of, for example, a bolt having a disk-shaped head, and a nut 31 is screwed and fixed to a base portion slidably passing through a spring seat 29. . The nut 31 is located inside a cylindrical movable block 33 to which the spring seat 29 is attached.

The movable block 33 has the large-diameter hole 17B.
This movable block 3 is movably installed in H
The tip end of the adjusting screw 35 is in contact with 3. The adjusting screw 35 is screwed to a bracket 37 integrally fixed to the pressing fixing member 17 via a plurality of bolts 38, and an operating lever 39 is attached to the adjusting screw 35.

Therefore, by rotating the adjusting screw 35 via the operation lever 39, the movable bracket 33 is pressed and the elastic member 25 and the pressing biasing member 2 are pressed.
The sliding piece 23 is strongly pressed against the cam surface 15C of the actuating member 15 via the shaft 7. In addition, the operation lever 3
By operating 9 in the opposite direction to the above, the adjustment screw 3
Since the pressing of the movable block 33 by 5 is released, the sliding piece 2 against the cam surface 15C of the operating member 15 is released.
The pressing force of 3 becomes weak.

The holder plate 9 is provided with a spring 41 for urging the actuating member 15 downward, and a restricting member 43 for restricting upward movement of the pressing fixing member 17. Are attached via bolts 45.

In the above structure, the operating member 15
Is lowered by the action of the spring 41, and the operation lever 39 is rotated to the right side in FIG. 1, and the adjusting screw 35 pushes the movable block 33 to strongly push the elastic member 25. At the time of, the upper end of the upper mold P is inserted between the actuating member 15 and the pressing fixing member 17 which are in the opened state by the action of the coil spring 22.

After that, by engaging the upper mold P with the lower mold (not shown) attached to the press brake and then lowering the upper table 3 or raising the lower mold,
The upper die P is raised relative to the die holder 1.

When the upper die P is relatively raised as described above, the operating member 15 is also raised integrally against the spring 41. When the operating member 15 is raised, the operating member 1
5, the sliding piece 23 slidably contacting the cam surface 15C of the elastic member 25
Will be pressed against. When the sliding piece 23 is pressed, the upper part of the pressing and fixing member 17 is pressed to the left in FIG. 1 via the elastic member 25, and swings about the mounting bolt 19 as a fulcrum.

That is, the sliding piece 23 is the actuating member 15
When pressed by the cam surface 15C in conjunction with the rise of
The lower end of the pressing and fixing member 17 is pressed to the right in FIG. 1, and the upper die P is pressed and fixed to the actuating member 15 or the holder plate 9 side. Therefore,
The upper mold P is pressed and fixed between the upper mold P and the actuating member 15 by the pressing and fixing member 17 by the urging force of the elastic member 25. When the vertical dimension of the operating member 15 is set to be small, the upper mold P can be pressed and fixed between the holder plate 9 and the pressing and fixing member 17.

That is, according to this embodiment, the upper part of the upper mold P is inserted between the actuating member 15 and the pressing and fixing member 17, and the upper mold P is relatively raised, so that no tool is used. The upper mold P can be attached to the upper part.

When removing the upper die P, the operating lever 39 is rotated to the left in FIG.
The movable block 33 is released from being pressed by the elastic member 2
By weakening the accumulating force of 5, the pressure fixing force of the upper mold P by the pressure fixing member 17 becomes weaker, and the upper mold P can be easily removed.

When the upper die P is removed, the actuating member 15 is lowered by the action of the spring 41 and returns to its original state. Then, the operation lever 39 is rotated rightward in FIG. 2 to be in the initial state.

The present invention is not limited to the embodiments described above, but can be implemented in other modes. In the above-described embodiment, the configuration in which the pressing and fixing member 17 swings has been described, but the following configuration is also possible, for example. That is, when the sliding piece 23 is moved leftward in FIG. 1 by the action of the cam surface 15C of the actuating member 15, a descending member is provided that is moved downward by the sliding piece 23 moving leftward, It is also possible to provide a pressing member that is moved to the right by the descending of the descending member, and to press and fix the upper die with this pressing member. The sliding piece, the descending member, and the pressing member can be easily interlocked by adopting a cam mechanism, a link mechanism, or the like, and it is desirable that the elastic member is arranged at an appropriate position of the case member. Is.

[0029]

As will be understood from the above description of the embodiments, according to the present invention, the upper die can be easily attached to and detached from the die holder without using a tool or the like. Is.

[Brief description of drawings]

FIG. 1 is a side cross-sectional explanatory view of a mold holder according to this embodiment.

FIG. 2 is a front view of the same die holder.

[Explanation of symbols]

 3 Upper table 9 Holder plate 15 Actuating member 17 Press fixing member P Upper mold

Claims (1)

[Claims] 1. A holder plate attached to an upper table in a press brake is provided with an actuating member that is moved up and down in association with a relative ascent of an upper die so as to be movable up and down. A mold holder for a press brake, comprising a pressing fixing member for pressing and fixing the upper mold to the actuating member or the holder plate side.