JPH06328135A - Upper die holder device for press brake - Google Patents

Abstract

PURPOSE:To easily attach, detach and exchange an upper die and to prevent the upper die from falling even when the fixing of the upper die is released by a fixedly pressing member. CONSTITUTION:This device consists of a holder body 5 mounted on an upper table 3, a support plate 7 mounted on the lower part of the holder body 5, an upper die fixedly pressing member 11 mounted on the holder body 5 to clamp and fix the upper part of the upper die 9 to the support plate 7, an inclined surface 33T in sliding contact with the upper die fixedly pressing member 11 mounted between this upper die fixedly pressing member 11 and a clamping member 33 provided with an engaging part 33K engaged with the upper die 9. Further, it is provided with a clasping force outputting device 13 fitted with an elastic member 49 which can adjust the clamping force of the upper die fixedly pressing member 11 and a clamp releasing device 15 which can release the clamp of the upper die 9 through the upper die fixedly pressing member 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press brake upper die holder device for holding an upper die for a press brake, and more particularly, to easily attach / detach to / from an upper table of the press brake. The present invention relates to a press brake upper die holder device.

[0002]

2. Description of the Related Art As is well known, a press brake is provided with an upper table (sometimes called an upper apron) and a lower table (sometimes called a lower apron) which are vertically opposed to each other. Also, one of the upper table and the lower table is provided as a ram that can move up and down.

In order to bend a plate-like work, an upper die is attached to the lower portion of the upper table, and a lower die is attached to the upper portion of the lower table. Then, the movable table is moved up and down to engage the upper die and the lower die, thereby bending the workpiece positioned between the upper die and the lower die.

In order to replace the upper mold according to the bent shape of the work and the like, a large number of upper mold holders are mounted on the lower portion of the upper table, and the upper molds are detachably supported by the large number of upper mold holders.

In the conventional upper die holder, the upper die pressing and fixing member is attached to the holder body attached to the lower portion of the upper table, and the upper die pressing and fixing member is fastened with a tightening bolt to push the holder body and the upper die pressing member. This is a structure in which the upper part of the upper die is strongly tightened and fixed by the fixing member.

[0006]

By the way, in the conventional press brake upper die holder device, in order to attach and detach the upper die, a large number of tightening bolts having a large number of upper die holders must be operated. However, there is a problem that the operation is extremely troublesome and troublesome.

Therefore, a structure has been developed in which an air cylinder is attached to the upper die holder, and the upper die pressing and fixing member is tightened and released by the air cylinder.

In the above structure, there is a problem that a large number of upper mold holders must be provided with air cylinders, respectively, and an air source is required, which makes the structure complicated and expensive.

Further, in the conventional structure, there is a risk that the upper mold may drop if the upper mold is not clamped by the upper mold pressing and fixing member. In addition, when mounting the upper mold on the upper mold holder, lightly tighten the upper mold pressing and fixing member so that the upper mold does not drop, and then tighten the upper mold pressing and fixing member with the lower mold and the upper mold aligned. There is a problem that the operation is troublesome because it must be tightened.

An object of the present invention is, in order to improve the above-mentioned problems, that the upper die can be easily attached / detached and replaced, and the upper die is released from being fixed by the pressing fixing member of the upper die holder. An object of the present invention is to provide an upper die holder device for a press brake that does not fall.

[0011]

In order to achieve the above object, the present invention is an upper die holder device for detachably mounting and supporting an upper die on an upper table in a press brake, which is attached to the upper table. A holder main body, a support plate provided at a lower portion of the holder main body, an upper mold pressing fixing member mounted on the holder main body to clamp and fix an upper part of the upper mold between the support plate and the upper mold pressing member. A tightening member provided between the fixing member and the upper mold and having a sloped surface that engages with and slides on the upper mold pressing and fixing member, and an engaging portion that engages with the upper mold, and the upper mold pressing and fixing member. A clamping force output device including an elastic member capable of adjusting the clamping force and a clamping release device capable of releasing the upper die clamp by the upper die pressing and fixing member to provide an upper die holder device for a press brake. Form was.

In the press brake upper die holder device, upper die pressing and fixing members are swingably supported on both front and rear sides of the holder body, and the clamping force output device is shared by both upper die pressing and fixing members. Is desirable.

[0013]

By adopting the upper die holder for press brake of the present invention, when the upper die is mounted on the holder body, when the lever is rotated in the counterclockwise direction, the upper die pressing and fixing member swings to support plate. There is a space between the upper die pressing and fixing member and the tightening member.

From this state, the upper die is inserted from the side while engaging the engaging portion provided on the upper die with the fastening member, and the lever is rotated clockwise, the fastening member and the support plate surface move the upper die. Lightly sandwiched.

In this state, the lower die is raised to contact the lower surface of the upper die, and when it is further raised, the engaging member of the upper die causes the tightening member to rise while sliding on the sloped surface, and to press and fix the upper die. The member is rotated against the elastic force of the elastic member of the clamping force output device, so that the upper die can be securely mounted and held.

Further, in order to separate the upper mold from the support plate, the upper mold can be separated by reversing the above-mentioned operation. Further, the mounted upper mold is provided with the upper mold. Since the joint portion engages the tightening member, the upper die does not drop.

[0017]

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

Referring to FIGS. 1 and 2, an upper die holder device 1 according to the present embodiment has a press brake (not shown).
A holder main body 5 detachably attached to the lower part of the upper table 3, a support plate 7 integrally provided on the lower part of the holder main body 5, and an upper mold 9 for fastening and fixing between the support plate 7. Upper die pressing fixing member 11
And a clamping force output device 13 capable of adjusting the clamping force of the upper die pressing and fixing member 11, and the upper die pressing and fixing member 1
It is provided with a clamp releasing device 15 capable of releasing the fastening fixation of the upper mold 9 by 1.

More specifically, the holder body 5 has a thick upper block portion 5 in the front-back direction (left-right direction in FIG. 2).
In the lower part of B, the thin support plate 7 is integrally provided. On the front surface (the left side surface in FIG. 2) of the upper block portion 5B of the holder body 5, the mounting plate 1 protruding upward through a plurality of bolts 17 (see FIG. 1).
9 is attached.

By contacting the upper mounting plate 19 with the lower front surface of the upper table 3 and tightening the clamp jaws 23 with the tightening bolts 21 screwed to the upper table 3,
The holder body 5 can be attached to the upper table 3. In order to adjust the vertical position of the holder body 5, the wedge member 2 is provided between the upper surface of the holder body 5 and the upper table 3.
5 is present.

With the above structure, the holder jaws 5 are slightly clamped so that the holder body 5 does not fall, and the wedge member 25 is slightly driven, whereby the holder jaws 5 can be lowered by a small amount. Therefore, the vertical position of the holder body 5 can be slightly adjusted.

The upper die pressing and fixing member 11 is made of a plate-shaped member having a width substantially equal to the width of the holder body 5 in the left-right direction, and the upper die 9 is clamped and fixed between the upper die 9 and the support plate 7. Therefore, the holder body 5 is swingably supported.

More specifically, the upper die pressing fixing member 11 is
The upper die pressing and fixing member 11 is swingably supported by a plurality of mounting bolts 27 penetrating through a through hole 11H provided at a substantially central portion in the vertical direction and horizontally fixed to the support plate 7 by screwing. In order to facilitate the above, a spherical seat 29 is interposed between the head portion 27H of each mounting bolt 27 and the upper die pressing and fixing member 11. Further, a weak coil spring 31 that acts to separate them from each other is mounted between the upper die pressing fixing member 11 and the support plate 7.

A sloped surface 11T, a projection 11C and an elongated hole 11A are provided on the lower portion of the upper die pressing and fixing member 11, and a tightening member 33 is attached to the upper pressing and fixing member 11. That is, the protrusion 33C formed on the tightening member 33
Engages with the projection 11C provided on the upper pressing and fixing member 11, and the sloped surface 33T formed on the tightening member 33 makes sliding contact with the sloped surface 11T provided on the upper pressing and fixing member 11, and by the tightening bolt 35. Installed. A collar 35K is fitted to the tightening bolt 35 so as to be movable in the elongated hole 11A. Further, the tightening member 33 is formed with a protruding engaging portion 33K that engages with the engaging portion 9K provided on the upper die 9.

The clamp releasing device 15 capable of releasing the clamp of the upper die 9 by the tightening member 33 provided on the upper die pressing and fixing member 11 is provided on the upper die pressing and fixing member 11.

The clamp releasing device 15 comprises a tightening screw 37 screwed onto the upper part of the upper die pressing and fixing member 11, and a lever 39 is attached to the tightening screw 37.

Therefore, by operating the lever 39, the tightening screw 37 is tightened and the tightening screw 3 is tightened.
7 can be loosened. Incidentally, in order to regulate the operation range (rotation range) of the lever 39, left and right regulation pins 41 are attached to the attachment plate 19.

As shown in FIG. 2, the clamping force output device 13 has an adjusting screw 45 in which a nut member 43 is screwed to adjust its position, and a ring member 47 fitted in the adjusting screw 45 so as to be movable in the axial direction. And the head 45 of the adjusting screw 45
A horizontal hole provided in the upper block portion 5B of the holder main body 5, which is made of a strong elastic member 49 such as a coil spring, a disc spring, or urethane rubber elastically mounted between the H and the ring member 47. It is installed inside 5H.

With the above construction, the accumulating force of the elastic member 49 can be adjusted by adjusting the screwing position of the nut member 43 with respect to the adjusting screw 45 to adjust the compression of the elastic member 49.

The tightening screw 37 is attached to the ring member 47.
The abutting member 51 that abuts the tip of the adjusting screw 45 is integrally attached, and the head portion 45H of the adjusting screw 45 abuts on the back wall portion of the hole 5H.

In the above-described structure, as shown in FIG. 2, when the upper die 9 is clamped between the support plate 7 of the holder body 5 and the upper die pressing and fixing member 11, the unclamping device 15 is released. When the lever 39 is rotated to the position R in the right direction in FIG. 1 and the shutoff screw 37 is tightened, the elastic member 49 is further compressed, so that the accumulating force of the elastic member 49 increases. , The upper mold 9 is more strongly tightened and fixed.

On the contrary, when the lever 39 is rotated to the position L in the left direction in FIG. 1 to loosen the shutoff screw 37, the fastening fixation of the upper die 9 is released.

When the lever 39 is operated to clamp and release the upper mold 9 by the upper mold pressing and fixing member 11 as described above, the upper mold pressing and fixing member 11 is centered on the mounting bolt 27. At 2, it swings to the left.

In order to guide the swing of the upper die pressing and fixing member 11 and regulate the upward movement of the upper die pressing and fixing member 11, as shown in FIG. The plurality of restriction pieces 53 contacting the upper surface are bolts 55
It is attached to the holder body 5 by.

Therefore, the upper die pressing and fixing member 11 clamps and fixes the upper die 9 at a fixed position without moving up and down.

The upper mold 9 which is detachably and replaceably supported by the upper mold holder device 1 having the above-mentioned structure has a lower end surface 7E of the support plate 7 as shown in detail in FIG.
Is provided with a contact surface 9F. Furthermore, the upper mold 9 is
The upper die pressing fixing member 11 is provided with a sliding contact surface 9S slidably contacting the front surface 7F of the support plate 7.
The clamp surface 9C pressed by the tightening member 33 of FIG. In addition, the clamping member 33 is attached to the clamp surface 9C.
Concave engaging portion 9K into which the engaging portion 33K provided in the
And the contact surface 33D on the lower surface of the engaging portion 33K provided on the tightening member 33 and the engaging portion 9K provided on the clamp surface 9C.
It is provided so as to contact the contact surface 9D on the lower surface of the. There is a slight gap between the upper surface 33U of the engaging portion 33K of the tightening member 33 and the upper surface 9U of the engaging portion 9K provided on the clamp surface 9C.

Further, the upper die 9 is provided with a work processing portion 9W for bending the work W in cooperation with the lower die 59 mounted on the lower table 57 of the press brake at the lower end portion.

In the above structure, when the upper die 9 is removed from the upper die holder device 1, the following operation is performed to mount the upper die 9 on the upper die holder device 1.

First, the lever 39 of the clamp releasing device 15 is rotated to the position R to hold the shut-off screw 37 in the tightened state. Even when the tightening screw 37 is tightened as described above, the support plate 7 and the upper die pressing fixing member 1
It is in an open state between the fastening member 33 at the lower part of No. 1.

Therefore, as shown by the imaginary line in FIG.
The upper thin portion of the work processing portion 9W of the upper die 9 is inserted between the support plate 7 and the upper die pressing fixing member 11 in the left-right direction, and the upper surface 9U of the engaging portion 9K provided in the upper die 9
Is placed on the upper surface 33U of the engaging portion 33K provided on the tightening member 33. In this state, the fastening member 33 and the front surface 7F of the support plate 7 are in a state of lightly sandwiching the mounting portion of the upper mold 9.

Thereafter, the movable sides of the upper and lower tables 3 and 57 in the press brake are moved up and down to engage the upper die 9 and the lower die 59, whereby the upper die 9 rises relative to the holder body 5. Will be done.

When the upper die 9 gradually rises relative to the holder body 5, the lower surface 9 of the engaging portion 9K formed on the upper die 9
D contacts the lower surface 33D of the engaging portion 33 of the tightening member 33, the tightening member 33 rises, and the sloped surface 3 provided on the tightening member 33.
The tightening member 33 presses the clamp surface 9C of the upper mold 9 by 3T and presses and slides on the sloped surface 11T of the upper mold pressing fixing member 11, so that the upper mold pressing fixing member 11 rotates clockwise in FIG. As a result, the elastic member 49 of the clamping force output device 13 is gradually compressed.

Therefore, when the abutment surface 9F of the upper die 9 abuts the lower end surface 7E of the support plate 7, the upper die pressing and fixing member 11 is tightened by the fastening member 33 by the action of the elastic force of the elastic member 49. The clamp surface 9C of the upper mold 9 is firmly clamped and fixed via the.

Therefore, the upper die 9 can be easily attached to the upper die holder device 1.

After mounting the upper die 9 on the upper die holder device 1 as described above, in order to remove the upper die 9 from the upper die holder device 1, the lever 39 is rotated to the left position L. Position L
When the lever 39 is rotated, as described above, the tightening by the tightening screw 37 is loosened, and the upper mold pressing and fixing member 11 releases the tightening and fixing of the upper mold 9.

The upper mold 9 is released from the tightening and fixing, and the upper mold 9 is released.
Is lowered by its own weight, the engaging portion 9K of the upper die 9 is locked by the engaging portion 33K of the fastening member 33, and the fastening member 33
Since the projection 33C provided on the upper mold 9 is hooked on the projection 11C provided on the upper mold pressing and fixing member 11, the upper mold 9 does not drop and is safe.

As described above, the upper die 9 can be easily removed from the upper die holder device 1 by moving the upper die 9 in the left-right direction when the upper die 9 is released from the tightening and fixing state.

That is, according to the above-described embodiment, the upper die 9 can be easily attached to and detached from the upper die holder device 1 with a simple structure without using any tool or the like.

FIGS. 4 to 6 show a second embodiment of the upper die holder device 1 according to the present invention. In this second embodiment, the front and rear of the upper die 9 are reversed to the rear surface side of the support plate 7. In addition, the upper mold 9 can be mounted.

Therefore, parts having the same functions as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted, and only the differences from the first embodiment will be described.

In order to mount the upper mold 9 on the rear surface side of the support plate 7, a rear upper mold pressing fixing member 61 is mounted on the rear surface of the support plate 7.

More specifically, a stud 63 having a hemispherical head portion 63H is horizontally mounted by a mounting bolt 65 on the rear surface of the support plate 7 of the holder body 5, and the stud 63 is pressed by the upper die. Fixing member 6
1 is swingably supported.

In order to operate the mounting bolt 65, a tool hole 11K is formed in the front upper die pressing and fixing member 11, and a head 63H of the stud 63 has a rear upper die pressing and fixing member. A pin 67 for preventing rotation, which engages with a groove 61G formed in 61, is attached. Therefore, when the mounting bolt 65 rotates, the stud 63 does not rotate.

In order to share the clamping force output device 13 with the front upper die pressing and fixing member 11 and the rear upper die pressing and fixing member 61, the hole 5H of the holder body 5 in which the clamping force output device 13 is installed is formed. A small hole 69 is formed in the back wall portion. Then, the abutting member 71 attached to the upper portion of the rear upper die pressing and fixing member 61 penetrates the small hole 69 and adjust screw 45.
Is in contact with the head 45H of the.

A ring nut 73 for restricting the contact portion 51 of the clamping force output device 13 is screwed on the inlet side of the hole 5H.

In the structure of the second embodiment, by tightening the mounting bolt 65, the upper mold 9 is firmly clamped and fixed to the rear side of the support plate 7 by the rear upper mold pressing and fixing member 61. . By loosening the tightening of the mounting bolt 65, the tightening and fixing of the upper mold 9 by the rear upper mold pressing and fixing member 61 is released.

It is to be noted that an appropriate inclusion is held between the support plate 7 and the front upper die pressing and fixing member 11 so that the front upper die pressing and fixing member 11 is immovable. By holding the upper die 9, the lever 39 can be operated to fix and release the upper die 9 by the rear upper die pressing and fixing member 61.

Therefore, in this second embodiment,
Corresponding to the bent shape of the work W, the front and back of the upper mold 9 can be reversed and mounted on the front side and the rear side of the support plate 7 in the holder main body 5, and like the first embodiment, the upper mold 9 can be mounted. It can be easily attached and detached and replaced.

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

[0060]

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, the upper mold is attached to and detached from the upper mold holder device. With a simple structure, the upper mold does not drop when the upper mold holder device releases the fixation of the upper mold, and the safety is further improved.

[Brief description of drawings]

FIG. 1 is a front view of an upper die holder device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view of a III arrow part in FIG.

FIG. 4 is a front view of an upper die holder device according to a second embodiment of the present invention.

5 is a cross-sectional view taken along line VV in FIG.

6 is a cross-sectional view taken along line VI-VI in FIG. 4, showing a case where the upper mold is mounted on the rear side.

[Explanation of symbols]

 1 Upper Die Holder Device 3 Upper Table 5 Holder Body 7 Support Plate 9 Upper Die 9K Engaging Part 11 Upper Die Pressing Fixing Member 11T Gradient Diagram 13 Clamping Force Output Device 15 Clamp Release Device 33 Tightening Member 33T Gradient Surface 33K Engaging Part 37 Tightening screw 39 Lever 43 Nut member 45 Adjustment screw 45H Head 47 Ring member 49 Elastic member 61 Rear upper die pressing fixing member

Claims (2)

[Claims] 1. An upper die holder device for detachably mounting and supporting an upper die on an upper table in a press brake, a holder main body attached to the upper table, a support plate provided at a lower portion of the holder main body, and An upper mold pressing and fixing member mounted on the holder body to clamp and fix the upper part of the upper mold between the support plate and the upper mold pressing and fixing member provided between the upper mold pressing and fixing member and the upper mold. Clamping force output including a tightening member having a sloped surface that engages with the member and is in sliding contact and an engaging portion that engages with the upper die, and an elastic member that can adjust the clamping force of the upper die pressing and fixing member. An upper mold holder device for a press brake, comprising: a device; and a clamp releasing device capable of releasing the upper mold clamped by the upper mold pressing and fixing member. 2. The upper die pressing and fixing member is swingably supported on both front and rear sides of the holder body, and the clamping force output device is shared by both upper die pressing and fixing members. An upper die holder device for a press brake according to range 1.