JPH0813379B2 - 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 press-fixing by the press-fixing member is configured such that the press-fixing member is tightened and fixed by a plurality of tightening bolts screwed to the holder plate, or the press-fixing is performed by an air cylinder or the like mounted on the holder plate. This is a configuration for operating the member.

[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 conventional problems as described above, the invention according to claim 1 provides a holder plate mounted on an upper table of a press brake with an upper mold between the holder plate and the holder plate. A press-fixing member that can be clamped and fixed is provided so as to be swingable, and the press-fixing member is used to move the press-fixing member relative to the relative movement of the upper mold between the holder plate and the press-fixing member. A pressing biasing device for gradually increasing the pressing force applied to the holder plate is provided.

According to a second aspect of the invention, in the invention according to the first aspect, the pressing biasing device is caused by the relative intrusion of the upper mold between the holder plate and the pressing fixing member. A person is provided with an elastic member that gradually increases the stored force by expanding the space between the holder plate and the pressing and fixing member.

[0008]

With the above structure, when the upper mold is relatively advanced between the holder plate and the pressing and fixing member, the pressing and fixing member moves the upper mold to the holder plate in relation to the relative moving operation of the upper mold. The pressing force gradually increases, and the pressing force becomes maximum when the upper die is mounted and fixed to the holder plate, so that the upper die can be securely fixed easily.

[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 part of an upper table 3 of a press brake (not shown) via a mounting tool 5 so as to be vertically adjustable. There is.

More specifically, a support plate 7 is mounted on the front surface of the upper table 3 through the fixture 5 so as to be vertically adjustable, and a holder plate 9 is provided on the lower rear surface of the support plate 7 with a plurality of bolts 11. It is attached integrally by. Between the upper surface of the holder plate 9 and the lower surface of the upper table 3, a wedge member 1 for vertically adjusting the mold holder 1 is provided.
3 is interposed.

The holder plate 9 has a mounting bolt 1
A plate-shaped pressing and fixing member 17 is swingably attached via 5. A spherical washer 19 is interposed between the pressure fixing member 17 and the head portion 15H of the mounting bolt 15, and
Between the holder plate 9 and the pressure fixing member 17,
A spring 21 that acts to separate the two is mounted.

At the lower end of the pressing and fixing member 17, an abutting member 23 that abuts the inclined surface PS formed on the upper die P is attached by a bolt 25. And this contact member 23
In order to urge the holder plate 9 against the inclined surface PS of the upper mold P, the holder plate 9 is provided with a pressing urging device 27. The pressing and urging device 27 is configured to press the upper mold P against the holder plate 9 by the pressing and fixing member 17 in association with the relative movement of the upper mold P between the holder plate 9 and the pressing and fixing member 17. Function to increase gradually.

More specifically, a large-diameter hole 9H is formed in the upper part of the holder plate 9 on the front side (left side in FIG. 1).
Is formed in the hole 9H, and an elastic body supporting member 2 such as a bolt whose disk-shaped head is in contact with the bottom of the hole 9H.
There are 9 interiors. Then, the elastic seat member 31 is slidably penetrated between the spring seat 31 and the spring seat 31 to gradually increase the stored force by being compressed. For example, a strong force such as a coil spring, a disc spring, and a urethane rubber. A flexible elastic member 33 is mounted.

A nut 35 for preventing the spring seat 31 from coming off is screwed and fixed to the tip of the elastic member support member 29.

The spring seat 31 has the nut 35.
Is attached to a cylindrical movable block 37 that accommodates the above. The distal end portion of an adjusting screw 39 as an urging adjusting member that is screwed onto the upper portion of the pressure fixing member 17 is in contact with the movable block 37. An operating lever 41 for bias adjustment is fixed to the adjusting screw 39, and a restricting pin 43 for restricting the rotation range of the operating lever 41 is planted in the support plate 7. Further, at a plurality of positions of the holder plate 9, restriction members 45 for restricting upward movement of the pressure fixing member 17 are attached by bolts 47.

In the structure as described above, the operation lever 4
When 1 is rotated to the right side in FIG. 2 and the adjusting screw 39 is screwed in, the movable block 37 is pressed by the adjusting screw 39 to compress the elastic member 33, so that the accumulating force of the elastic member 33 increases.

As described above, when the elastic force of the elastic member 33 is increased and the lower end of the pressing and fixing member 17 and the holder plate 9 are opened by the action of the spring 21, The upper part of the upper mold P is inserted between the pressure fixing member 17 and the holder plate 9 in the left-right direction of FIG. Then, the hook portion PF provided on the upper end portion of the upper mold P is locked and supported by the lower protruding portion 17P of the pressing and fixing member 17.

As described above, after the upper part of the upper mold P is inserted between the pressure fixing member 17 and the holder plate 9, the upper table 3 is lowered or the lower table (not shown) is raised. The lower part of the upper mold P is engaged with a lower mold (not shown) mounted on the lower table to raise the upper mold P relative to the holder plate 9 and the like.

As described above, when the upper mold P is raised relative to the holder plate 9 and the like, the inclined surface P of the upper mold P is raised.
The contact member 23 provided at the lower end portion of the pressing and fixing member 17 contacts S and is gradually pressed to the left in FIG. As described above, when the lower portion of the pressing and fixing member 17 is pressed and the space between the holder plate 9 and the pressing and fixing member 17 is gradually expanded, the pressing and fixing member 17 is gradually swung clockwise in FIG. , Adjusting screw 39
Gradually presses the movable block 37 largely.

When the movable block 37 is gradually pressed,
The elastic member 33 is gradually compressed to a small size. Therefore, the abutting member 23 provided under the pressing and fixing member 17 is moved to the upper mold P by the reaction force of the elastic member 33.
Is gradually and strongly pressed against the holder plate 9, and the upper mold P is firmly pressed and fixed.

That is, according to this embodiment, the upper die P can be easily and surely and firmly attached to the die holder 1 without using a tool or the like.

When the upper die P mounted on the die holder 1 is removed, the urging adjusting operation lever 41 is rotated to the left side in FIG. When the operation lever 41 is rotated as described above, the adjustment screw 39 is retracted to move the movable block 3
The pressing force of 7 is released, and the reaction force of the elastic force of the elastic member 33 is weakened.

Therefore, the pressing force of the upper die P by the contact member 23 is reduced, and the upper die P can be easily removed.

FIGS. 3, 4 and 5 show another embodiment which replaces FIGS. 1 and 2. 3, 4, and 5
In the figure, the same reference numerals are given to the constituent members having the same functions as those of the constituent members in FIGS. 1 and 2, and the description thereof will be omitted.

That is, in FIG. 3, FIG. 4 and FIG. 5, the structure, action and effect of inserting the upper mold P into the front side of the holder plate 9 (left side in FIG. 3 and FIG. 4) and pressing it are as follows.
Since it is almost the same as the embodiment of FIGS. 1 and 2 described above, detailed description will be omitted. In this embodiment, the upper mold P can be inserted and fixed on the rear side of the holder plate 9 (right side in FIGS. 3 and 4).

In FIGS. 3, 4, and 5, a second pressing fixing member 53 is swingably mounted on the rear side of the holder plate 9 by a plurality of mounting bolts 49 and nuts 51. Each of the mounting bolts 49 is inserted into a hole 117H formed through the first pressing and fixing member 17 in the front-rear direction and attached to the holder plate 9. In addition, as shown in FIG. 3, the nut 51 has a hole 53H formed in the second pressure fixing member 53.
And is screwed into the mounting bolt 49. A pin 55 is driven into the nut 51,
Moreover, since the pin 55 is in the groove 53G formed in the second pressing and fixing member 53, the nut 51 is screwed to the mounting bolt 49 without rotating.

Further, the hole 53 of the second pressure fixing member 53.
A spherical seat 51Q for supporting the nut 51 on the H portion is formed on the nut 51, and the holder plate 9 and the second
A spring 57, which acts to separate the pressing and fixing member 53 from each other, is elastically mounted.

At the lower end of the second pressure fixing member 53,
A plurality of contact members 59 that contact the inclined surface PS formed on the upper mold P are attached by bolts 61. Further, an abutting member 63 such as a bolt that abuts a rear portion of the elastic supporting member 29 of the pressing biasing device 27 is attached to an upper end portion of the second pressing fixing member 53.

With the above structure, the upper part of the upper die P is inserted from the side with the mounting bolt 49 loosened, and then the mounting bolt 49 is tightened. At this time, since the pin 55 is driven into the nut 51, the nut 51 is tightened without rotating. After tightening the mounting bolts 49, the upper table 3
Or the lower table (not shown) is raised to engage the lower part of the upper mold P with the lower mold (not shown) on the lower table, and the upper mold P is held by the holder plate 9
And so on relative to the above.

When the upper mold P is raised relative to the holder plate 9 and the like, the contact member 59 provided at the lower end of the second pressing fixing member 53 contacts the inclined surface PS of the upper mold P, At 3, the pressure is gradually pushed to the right. Second
When the lower portion of the press fixing member 53 is pressed, the second press fixing member 53 is swung counterclockwise around the spherical seat 51Q of the nut 51 as a fulcrum, and the elastic member 33 is compressed via the contact member 63. It The force generated at that time presses the upper mold P, and as a result, the upper mold P is pressed and fixed.

When removing the upper mold P mounted on the mold holder 1, it can be easily removed by loosening the mounting bolt 49.

When the upper die P is attached to the rear side of the holder plate 9 (right side in FIG. 3), there is no upper die P on the front side of the holder plate 9 (left side in FIG. 3), and the front side of the holder plate 9 is not attached. When the upper mold P is mounted on the holder plate 9, there is no upper mold P on the rear side of the holder plate 9, so that they do not collide with each other and do not interfere with each other.

The present invention is not limited to the above embodiment, but can be implemented in other modes by making appropriate changes.

[0034]

As can be understood from the above description of the embodiments, the invention according to claim 1 is characterized in that the holder plate (9) mounted on the upper table (3) of the press brake is attached to the holder plate (9). A press fixing member (17), which is capable of sandwiching and fixing the upper die (P), is swingably mounted between the holder plate (9) and the press fixing member (17). A pressing biasing device for gradually increasing the pressing force applied to the holder plate (9) of the upper mold (P) by the pressing fixing member (17) in relation to the relative movement of the upper mold (P). Be prepared.

According to a second aspect of the present invention, in the first aspect of the present invention, the pressing and urging device includes an upper die (P) between the holder plate (9) and the pressing and fixing member (17). The elastic member (33) is provided to gradually increase the stored force by expanding the space between the holder plate (9) and the pressure fixing member (17) due to the relative approach.

As is apparent from the above structure, in the invention according to claim 1, the pressing fixing member is associated with the relative advancing operation of the upper mold P between the holder plate 9 and the pressing fixing member 17. This is a configuration including a pressing biasing device for gradually increasing the pressing force of the upper mold P on the holder plate 9 by 17.

Therefore, according to the first aspect of the present invention, when the upper die P is relatively advanced between the holder plate 9 and the pressing fixing member 17 so as to be mounted on the holder plate 9, the pressing fixing member 17 is pressed. The pressing force due to gradually increases,
When the relative approach is stopped and the holder plate 9 is mounted, the pressing force of the pressing fixing member 17 becomes maximum,
The upper die P can be reliably fixed to the holder plate 9.

That is, the upper mold P can be fixed only by the operation of relatively moving the upper mold P between the holder plate 9 and the pressing and fixing member 17, and the upper mold P can be attached to the holder plate 9. It can be performed easily and surely.

In the second aspect of the invention, the upper mold P is relatively advanced between the holder plate 9 and the pressing and fixing member 17 so that the space between the holder plate 9 and the pressing and fixing member 17 is gradually enlarged. Then, since the elastic member 33 that gradually increases the stored force is provided, the relative entry of the upper mold P between the holder plate 9 and the pressing and fixing member 17 progresses, and the elastic member 33 moves. As the stored force increases, the upper mold P can be more reliably and firmly fixed by the pressing and fixing member 17, and the upper mold P can be easily mounted.

[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 explanatory view of the mold holder of the above.

3 is a sectional view taken along line III-III in FIG.

4 is a cross-sectional view taken along line IV-IV in FIG.

FIG. 5 is a front explanatory view of a mold holder according to another embodiment.

[Explanation of symbols]

 3 Upper Table 9 Holder Plate 17 Press Fixing Member 33 Elastic Member 49 Mounting Bolt 51 Nut 53 Second Press Fixing Member P Upper Mold

Claims (2)

[Claims] 1. A holder plate (9) mounted on an upper table (3) of a press brake is provided with a pressing and fixing member (17) capable of sandwiching and fixing an upper die (P) between the holder plate (9) and the holder plate (9). The pressure fixing member (17) is mounted so as to be swingable, and is related to the relative movement of the upper mold (P) between the holder plate (9) and the pressure fixing member (17). A mold holder for a press brake, comprising a pressing biasing device for gradually increasing the pressing force of the upper mold (P) on the holder plate (9). 2. The pressing biasing device comprises a holder plate (9).
Energy is accumulated by expanding the space between the holder plate (9) and the pressure fixing member (17) due to the relative entry of the upper mold (P) between the pressure fixing member (17) and the pressure fixing member (17). The press brake mold holder according to claim 1, further comprising an elastic member (33) that gradually increases the force.