JPH0790283B2 - Upper die holder device 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 an upper die holder device for a press brake for holding an upper die for a press brake, and more specifically, attachment / detachment exchange of an upper die to an upper table in the press brake. The present invention relates to an upper die holder device for a press brake that can easily perform the above.

[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 lower mold of the upper mold, thereby bending the work positioned between the upper mold and the lower mold.

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 by the tightening bolts to fix the holder body and the upper die pressing and fixing member. It is a structure in which the upper part of the upper mold is strongly clamped and fixed by a 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.

In order to solve the above-mentioned problems, an object of the present invention is that the upper die can be easily attached / detached and exchanged not only from the lateral direction but also from below, and 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 which does not fall even when the upper die is released from being fixed.

[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. Clamping force output device provided with an elastic member capable of adjusting the clamping force, a clamp releasing device capable of releasing the upper die clamp by the upper die pressing and fixing member, and swinging back and forth in the clamp releasing device. A lever attached to the clamp release device, an urging member that is provided in the clamp release device and always pushes the lever backward, and a restricting member that restricts the rotation of the lever that is installed on the front surface of the holder body. An upper die holder device for a press brake was constructed.

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 the press brake of the present invention, in order to mount the upper die on the holder body from the lateral direction, the lever is counterclockwise with the regulating member attached to the front surface of the body plate. When rotated in the direction, the upper die pressing and fixing member swings to create a space between the support plate and the tightening member provided on the upper die pressing and fixing member. When the upper die is inserted from the side while being engaged with the member and the lever is rotated clockwise, the fastening member and the support plate surface sandwich the upper die lightly.

In this state, the lower mold is lifted to contact the lower surface of the upper mold, and when it is further lifted, the engaging member of the upper mold causes the tightening member to move up while sliding on the sloped surface, thereby pressing and fixing the upper mold. 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 performing the above-described operation in reverse. Further, the mounted upper mold is attached to the upper mold. Since the joint portion engages the tightening member, the upper die does not drop.

When the upper die is attached to the holder body from below, the lever is rotated forward against the urging force of the urging member to bypass the regulating member, and then the lever is rotated counterclockwise.
When the upper die is mounted from below by rotating it by 5 degrees or more, and then the lever is rotated clockwise by 225 degrees or more, the upper die is clamped to the holder body in the above-described manner.

[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-rear direction (left-right direction in FIG. 1).
In the lower part of B, the thin support plate 7 is integrally provided. On the front surface (left side surface in FIG. 1) 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. 2).
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 lower table 3.
5 is interposed.

With the above structure, the holder jaws 5 can be slightly lowered by holding the clamp jaws 23 in a lightly tightened state to the extent that the holder body 5 does not drop and then slightly driving the wedge member 25. The vertical position of the holder body 5 can be adjusted slightly.

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. Can be done easily. In addition, a weak coil spring 29 is mounted between the upper die pressing and fixing member 11 and the support plate 7 so as to separate them from each other.

A sloped surface 11T and a projection 11C are formed in the lower portion of the upper die pressing and fixing member 11, and the tightening member 31 is integrated by engaging with the sloped surface 11T and the projection 11C. There is. Further, the tightening member 31 is formed with a protruding engaging portion 31K 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 31 provided on the upper die pressing and fixing member 11 is provided on the upper portion of the upper die pressing and fixing member 11.

The clamp releasing device 15 is composed of a tightening screw 33 screwed onto the upper die pressing and fixing member 11, and a supporting block 35 is attached to the tightening screw 33. A lever 39 is attached to the block 35 via a hinge pin 37. For example, a leaf spring 43 as an urging member is constantly urged rearward (rightward in FIG. 1) on the support block 35 by a tightening screw 41 to push the lever 39 rearward. The tightening screw 33 is attached by being tightened with a bolt 45.

Therefore, by operating the lever 39, the tightening screw 33 is tightened and the tightening screw 3 is tightened.
3 can be loosened. In order to regulate the operation range (rotation range) of the lever 39, for example, a regulation stopper 4 as a left and right regulation member is provided on the front surface of the mounting plate 19.
7 is attached.

As shown in FIG. 1, the clamping force output device 13 has an adjusting screw 51 in which a nut member 49 is screwed to adjust its position, and a ring member 53 fitted to the adjusting screw 51 so as to be movable in the axial direction. And the head 51 of the adjusting screw 51
A horizontal hole provided in the upper block portion 5B of the holder main body 5, which is made of a strong elastic member 55 such as a coil spring, a disc spring, or urethane rubber elastically mounted between the H and the ring member 53. It is installed inside 5H.

With the above configuration, the accumulating force of the elastic member 55 can be adjusted by adjusting the screwing position of the nut member 49 with respect to the adjusting screw 51 to adjust the compression of the elastic member 55.

The tightening screw 33 is attached to the ring member 53.
The abutment member 57 that abuts against the tip of the hole is attached integrally, and the head 51H of the adjusting screw 51 abuts against the inner wall of the hole 5H.

In FIG. 1, in order to mount the upper mold 9 on the rear surface side of the support plate 7 (the right surface side in FIG. 1), a rear upper mold pressing fixing member 59 is mounted on the rear surface of the support plate 7. .

More specifically, a head 61H is horizontally mounted on the rear surface of the support plate 7 of the holder body 5 by means of a mounting bolt 61 having a hemispherical shape, and the upper die pressing and fixing member 55 is swingable. Supported by.

In order to share the clamping force output device 13 with the front upper die pressing fixing member 11 and the rear upper die pressing fixing member 59, the hole 5H of the holder main body 5 in which the clamping force outputting device 13 is installed is formed. A small hole 63 is formed in the back wall portion. Then, the abutting member 65 attached to the upper portion of the rear upper die pressing and fixing member 59 penetrates the small hole 63, and the adjusting screw 51.
It is in contact with the head 51H of the.

A ring nut 67 for restricting the contact portion 57 of the clamping force output device 13 is screwed on the inlet side of the hole 5H.

In the above structure, as shown in FIG. 1, the upper mold 9 is inserted from the lateral direction between the support plate 7 of the holder body 5 and the upper mold pressing and fixing member 11.
When the clamp is in the clamped state, the clamp release device 1
The lever 39 in FIG.
When the elastic member 55 is further compressed by turning to the stopper 47 on the right side and tightening the tightening screw 33, the elastic force of the elastic member 55 increases, and the upper mold 9 is pushed further. It will be strongly tightened and fixed.

On the contrary, when the lever 39 is rotated 90 degrees to the leftward position L in FIG. 2 and hits the left stopper 47 to loosen the tightening screw 33, the upper die 9 is released from the tightening fixation. It will be.

When the upper mold pressing and fixing member 11 is tightened and fixed and the fixing is released by operating the lever 39 as described above, the upper mold pressing and fixing member 11 is centered on the mounting bolt 27. At 1, it swings to the left.

As shown in FIG. 1, the upper mold 9 which is detachably and replaceably supported by the upper mold holder device 1 having the above-described structure has a contact surface 9F which contacts the lower end surface 7E of the support plate 7. Is equipped with. Further, the upper die 9 has a sliding contact surface 9S slidably contacting the front surface 7F of the support plate 7 and a clamp surface 9C pressed by the tightening member 31 of the upper die pressing and fixing member 11. . Further, a concave engagement portion 9K into which the engagement portion 31K provided on the tightening member 31 is inserted is formed on the clamp surface 9C, and the lower surface of the engagement portion 31K provided on the tightening member 31 is abutted. The surface 31D and the contact surface of the lower surface of the engaging portion 9K provided on the clamp surface 9C are provided in contact with each other. The upper surface 31U of the engaging portion 31K of the tightening member 31 and the clamp surface 9
There is a slight clearance from the upper surface 9U of the engaging portion 9K provided on C.

Further, the upper die 9 is provided at its lower end with a work processing portion 9W for folding and lowering the work W in cooperation with a lower die 71 mounted on the lower table 69 of the press brake.

In the above construction, 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 from the lateral direction.

First, the lever 39 of the clamp releasing device 15 is rotated to the position R to hold the tightening screw 33 in the tightened state. Even when the tightening screw 33 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 lower portion 1 and the tightening portion 31.

Therefore, the thin portion of the upper portion of the workpiece processing portion 9W in the upper die 9 is inserted from the left and right between the support plate 7 and the upper die pressing and fixing member 11 so that the engaging portion 9K of the upper die 9 is provided. Engagement part 3 whose upper surface is provided on the fastening member 31
Place it on the upper surface 31U of 1K. In this state, the tightening member 3
1 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 69 in the press brake are moved up and down to engage the upper die 9 and the lower die 71, so that 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 of the engaging portion 9K formed on the upper die 9 comes into contact with the lower surface of the engaging portion 31K of the tightening member 31 and the tightening member. Three
1, the clamp member 31 presses the clamp surface 9C of the upper mold 9 by the slope surface 31T provided on the clamp member 31, and presses and slides on the slope surface 11T of the upper mold pressing fixing member 11. The upper die pressing and fixing member 11 rotates in the clockwise direction in FIG. 1, and the elastic member 55 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 tightening member 31 due to the action of the elastic force of the elastic member 55. 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 33 is loosened, and the upper mold 9 is released from the fixed fixation by the upper mold pressing and fixing member 11.

The upper die 9 is released from the tightening fixation, and the upper die 9
Is lowered by its own weight, the engaging portion 9K of the upper die 9 is locked by the engaging portion 31K of the fastening member 31, and the fastening member 31
Since the protrusion provided on the upper mold 9 is hooked on the protrusion 11C provided on the upper mold pressing and fixing member 11, the upper mold 9 does not drop and is safe.

As described above, by moving the upper mold 9 in the left-right direction when the upper mold 9 is in the state where the upper mold 9 is released from the fastening fixation, the upper mold 9 can be easily removed from the upper mold holder device 1.

That is, according to the above 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.

Next, when the upper die 9 is inserted from below the upper die holder device 1 and attached, the lever 39 is urged against the urging force of the leaf spring 43 with the hinge pin 37 serving as a fulcrum.
In the case where the lever 39 is tilted counterclockwise by about 30 degrees from the position indicated by the solid line to the position indicated by the chain double-dashed line in FIG.
Dodge from 7. In this state, when the tightening member 31 is rotated counterclockwise in FIG. 2 by 225 degrees (position D in FIG. 2) or more, the tightening member 31 swings from the position shown by the solid line in FIG. Attached member 31 and support plate 7
A sufficient gap is formed between the upper mold 9 and the front face (the left side face in FIG. 1) of the upper mold 9, and the upper mold 9 is inserted into the gap from below the upper mold holder device 1.

Then, as described above, the lever 39 is pulled forward by about 30 degrees and rotated clockwise, the left side stopper 47 in FIG. 2 is evaded, and the right side stopper 47 is contacted (position R). , The upper die 9 is lifted by bringing some force, for example, the die 67 into contact with the work processing portion 9W of the upper die 9 to raise the upper die 9, and the upper die 9 is automatically moved in the same manner as the lateral operation described above. The upper mold 9 will be clamped.

Further, when the upper die 9 is removed below the upper die holder device 1, the lever 39 is pulled about 30 degrees toward the front side, as shown in FIG.
At ∘, it is automatically unclamped by rotating it from the R position to the D position counterclockwise by 225 ° or more.

Thus, in the upper die holder device 1,
Since the lever 39 can be rotated toward the front with the hinge pin 37 as a fulcrum, the stopper 47 is avoided.
The upper die 9 can be automatically clamped and unclamped not only from the lateral direction but also from the downward direction.

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

[0056]

As can be understood from the above description of the embodiments, according to the present invention, since the constitution is as described in the claims, the attachment / detachment exchange of the upper die with respect to the upper die holder device is carried out. With a simple structure, it can be performed not only from the lateral direction but also from below, and the upper mold does not drop when the upper mold is not fixed by the upper mold holder device. This improves the sex.

[Brief description of drawings]

FIG. 1 shows a main part of the present invention and is taken along line II in FIG.
It is sectional drawing which followed the line.

FIG. 2 is a front view of the upper die holder device of the present invention.

[Explanation of symbols]

 1 Upper Die Holder Device 3 Upper Table 5 Holder Main Body 7 Support Plate 9 Upper Die 9K, 31K Engaging Part 11 Upper Die Pressing Fixing Member 11T, 31T Gradient Surface 13 Clamping Force Output Device 15 Clamp Release Device 31 Tightening Member 33, 41 Tightening screw 35 Support block 37 Hinge pin 39 Lever 43 Leaf spring (biasing 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, 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 apparatus, a clamp releasing device capable of releasing the upper mold clamp by the upper die pressing and fixing member, a lever attached to the clamp releasing device so as to be swingable in the front-rear direction, and a clamp releasing device. An upper die holder device for a press brake, comprising: a biasing member that constantly pushes the lever rearward; and a restricting member that is mounted on the front surface of the holder body and restricts the rotation of the lever. 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.