JPH06182448A - Upper die holder for press brake - Google Patents

Abstract

PURPOSE:To improve workability and safety by putting an upper die on a lower die to assemble into an upper die holder and moving the upper die or the lower die vertically to automatically tighten the upper die with the upper die holder. CONSTITUTION:A holder plate 13 is attached to an upper table 3 in a press brake 1; a movable lock member 41 is provided by which a brace 15 for fixing the upper die P on this holder plate 13 is pressed or released; and a pressing member 37, by which the brace 15 is pressed in a pressing direction by means of the upper die P and the pressing by the movable lock member 41 is made possible at the time of moving the upper die P in the vertical direction for inserting, is provided in the brace 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an upper die holder in a press brake.

[0002]

2. Description of the Related Art Conventionally, when attaching an upper die to 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 upper die holders. There is.

As a conventional technique, for example, Japanese Patent Application Laid-Open No. 2-280.
No. 927 is known. In this prior example, when inserting the upper mold, hold the upper mold with one hand or both hands,
A tool, which is an upper mold, is inserted from below between the lower end surface of the intermediate tool holder and the tightening member, and the tool is fixed by the tightening member.

[0004]

By the way, in the above-mentioned prior art, when the upper die is mounted on the upper table of the press brake, the upper die is manually supported and mounted, but the upper die is usually 10 kg. The booth neck mold weighs about 25 kg. Therefore, when inserting the upper mold, you need to put your hand between the upper mold and the lower mold,
Due to the weight, a hand could be caught between the lower mold and the upper mold, resulting in injury, which was dangerous.

In order to solve the above problems, an object of the present invention is to place an upper die on a lower die and incorporate it into a upper die holder from the side, and automatically move the upper die or the lower die up and down. Another object of the present invention is to provide an upper mold holder for a press brake, which improves workability and safety by tightening the upper mold with the upper mold holder.

[0006]

In order to achieve the above-mentioned object, the present invention has a movable structure for attaching a holder plate to an upper table in a press brake, and pressing or releasing a clamp for fixing an upper die to the holder plate. A lock member is provided, and when the upper die is moved vertically and inserted, the upper die urges the clamp in the pressing direction, and the movable lock member enables the urging member to be pushed to the clamp. The upper mold holder for the press brake was provided.

[0007]

By adopting the upper die holder for the press brake of the present invention, when the upper die is inserted into the upper die holder and moved in the vertical direction, the urging member attached to the clamp by the upper die is Pressed. When the biasing member is pressed, the clamp is rotated and the clamp comes into contact with the upper mold. In this state, the clamp can be pressed by the movable lock member, and the upper mold is pressed and fixed to the holder plate via the clamp by the rotation of the movable lock member.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. Since the press brake has a known structure, its illustration and description are omitted.

Referring to FIGS. 1 and 2, the press brake 1 is provided with an upper table 3 which is long in the longitudinal direction and is fixed above a frame (not shown) which stands upright and left. Lower mold D provided on the lower table 5 while raising and lowering the lower table 5 with a cylinder.
And the upper die P fixed to the upper die holder 7 arranged in plural on the upper table 3, the material is bent.

More specifically, the upper mold holder 7 includes a support plate 1 on the lower front surface of the upper table 3 via a fixture 9.
1 is mounted so that it can be adjusted up and down, and this support plate 1
The holder plate 13 is integrally attached to the lower rear surface of the unit 1 by a plurality of bolts. A bracket 17 that rotatably supports a clamp 15 on the holder plate 13.
Are provided on the left and right sides in FIG.

More specifically, each of the brackets 17 and the holder plate 13 are fixed to each other by fastening bolts 19, and a pin 23 provided integrally with the clamp 15 in an engaging hole 21 formed in the bracket 17. Is inserted and clamp 15
Is rotatable.

As shown in FIG. 2, the clamp 15 is provided with a tightening member 25 on the left and right sides. Details of the tightening member 25 are shown in FIG.
That is, a bolt 27, which is one member of the fastening member 25, penetrates the clamp 15 and is screwed into the holder plate 13, and the hole 29 into which the bolt 27 formed in the clamp 15 is inserted.
An ammunition 33 such as a coil spring is interposed between the bottom portion 29A and the head portion 31 of the bolt 27. A spacer 35 is inserted between the clamp 15 and the holder plate 13, and the spacer 35 is
Due to the resilience of the ammunition machine 33, the clamp 15 is rotated clockwise around the pin 23 in FIGS. 1 and 3, and the upper mold P is inserted between the clamp 15 and the holder plate 13. This is for maintaining the optimum gap S when inserting.

Further, an urging member 37 is fixed to the upper portion of the back surface of the clamp 15 with a screw 39. Biasing member 37
For example, a V-shaped leaf spring may be used, but a convex block or the like may be used. In short, when the upper die P is lifted by a predetermined amount (K amount shown in the drawing of FIG. 1). , The pressing member 37 is pressed on the upper part of the upper mold P, and the clamp 15 is rotated counterclockwise about the pin 23 in FIGS. Against this, the tip of the clamp 15 is brought into contact with the upper mold P.

As shown in FIG. 2, the movable lock member 41 is provided on the center line of the clamp 15 in the left-right direction. More specifically, referring to FIG. 4, the rotary locking cam 43, which is a member of the movable lock member 41, is integrally provided on a shaft 45 penetrating the support plate 11 and is rotatable. ing. The rotary locking cam 43 has an inclined surface 47 that is eccentric with respect to the shaft 45 and is in sliding contact with the upper back surface of the clamp 15. The shaft 45 is the support plate 11
It is rotatably supported by a bearing member 49 provided on the. A lever 51 is fixed to the tip of the shaft 45.

With the above construction, as its function, the lever 51 is in the position shown by the chain double-dashed line in the drawing of FIG. 2 before the upper die P is inserted. That is, the long part of the rotary locking cam 43 is at the position indicated by the chain double-dashed line in the drawing of FIG. From this state, the upper die P is placed on the lower die D while being laterally inserted into the gap S between the clamp 15 and the holder plate 13 and the upper die P is further raised, and the upper die P is urged at the upper end. Since the member 37 is pressed, the clamp 15 rotates, and the tip of the clamp 15 contacts the upper mold P. Then, when the lever 51 is rotated to the position shown by the solid line in the drawing of FIG. 2, the movable locking cam 43 is rotated, and the movable locking cam 43 is tightened by the inclined surface 47 formed in the long portion. The upper back surface of the gold 15 is pressed, the clamp 15 rotates counterclockwise in FIG. 4,
The upper die P can be pressed.

When the upper die P is detached, it is possible to detach it by reversing the above operation.

Thus, the upper die P can be automatically inserted into and removed from the upper die holder 7 without requiring a great deal of manpower, and it is necessary to support the upper die P manually. Since it does not exist, workability and safety can be improved.

FIG. 5 shows another embodiment. The second embodiment differs from the first embodiment in the shape of the upper die P and the shape of the clamp, and all the other members are the same members as in the first embodiment. The same reference numerals are given and the description is omitted.

The clamp 53 is provided with a protruding portion 53P at the lower portion, and the upper die P has a protruding portion 5P of the clamp 53.
The recess P _H into which 3P is inserted, and the hook P at the upper end of the upper mold P
_F is formed.

With the above structure, when the upper die P is inserted and attached, the hook portion P _F formed at the upper end of the upper die P can be hooked on the protrusion 53P provided on the clamp 53, and the upper die P can be hooked. The workability when assembling and dismounting the upper mold holder 7 is improved. The biasing member 37 is the same member as in the first embodiment. Thus, the effect can be the same as that of the first embodiment.

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

[0022]

As can be understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, it is provided on the clamp when the upper mold is attached. By pressing the biasing member, the clamp is rotated and brought into contact with the upper mold, and the movable lock member presses the clamp to firmly attach the upper mold to the upper mold holder.

Thus, the upper die can be automatically attached to and detached from the upper die holder without requiring a lot of manpower, and the upper die can be detached or mounted while being manually supported. Since it is not necessary, workability and safety can be improved.

[Brief description of drawings]

FIG. 1 shows an upper mold holder which is a main part of the present invention,
It is sectional drawing which followed the II line in FIG.

FIG. 2 is a front view of FIG.

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

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

FIG. 5 is a cross-sectional view of an upper mold holder that is a second embodiment of the present invention.

[Explanation of symbols]

 1 Press Brake 3 Upper Table 7 Upper Die Holder 13 Holder Plate 15, 53 Tightening 37 Biasing Member 41 Movable Locking Member P Upper Die

Claims (1)

[Claims] 1. A holder plate is attached to an upper table of a press brake, and a movable lock member for pressing or releasing a clamp for fixing an upper die is provided on the holder plate, and the upper die is vertically moved for insertion. An upper mold holder for a press brake, wherein an urging member for urging a clamp in a pressing direction by an upper mold when being worn and enabling the movable lock member to press the clamp is provided on the clamp.