JPH0244884Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an upper die clamping fitting for a press brake, and in particular, a press brake upper die fall prevention mechanism suitable for preventing the upper die from falling when the upper die is removed. The present invention relates to an upper mold clamp having the following.

[Technical background of the invention and problems with conventional technology]

In a press brake, the upper mold is fixed by pressing it against the ram using an upper mold clamp.

Further, in a press brake having a plurality of upper molds, the plurality of upper molds are fixed with a plurality of upper mold fasteners.

Conventionally, the upper mold clamp was not provided with an upper mold drop prevention mechanism. Therefore, when removing the upper mold, the ram is lowered and the distance between the upper mold and the lower mold is 1.
Position the upper mold so that it is about 5mm from the inside, loosen the upper mold clamp, and drop the upper mold down to the V of the lower mold.
The upper mold was removed from the side of the machine by sliding laterally within the groove. Also, when attaching the upper mold, the distance between the upper mold and the lower mold was set and positioned in the same manner as described above, and the upper mold was inserted into the lower groove from outside the side of the machine and moved to a predetermined position.

In addition, when multiple upper molds are used, when removing the central upper mold, it is necessary to remove the adjacent outer upper mold that is not intended, and then take the central upper mold out of the machine. .

As mentioned above, with conventional upper mold clamps, if the upper mold clamp is loosened in order to remove the upper mold, the upper mold will fall and damage the lower mold or create a danger. Set the distance by lowering the
In addition, since the upper mold is removed by moving it laterally, there is a problem that it is time-consuming and reduces work efficiency. In addition, when multiple upper molds are attached, it is necessary to remove adjacent upper molds in order to remove the central upper mold, which requires extra work and reduces work efficiency. Ta.

[Purpose of invention]

The present invention is an attempt to solve the above-mentioned problems.The purpose of the present invention is to prevent the upper mold from falling when loosening the fixing of the upper mold clamping fitting to remove the upper mold, and to A press spray plate that eliminates the need to set the distance between molds, and also eliminates the need to remove adjacent upper molds when attaching and removing the central upper mold of multiple upper molds, improving work efficiency and reducing work risks. An object of the present invention is to provide an upper mold clamp having an upper mold fall prevention mechanism.

[Summary of the idea]

The claw part that is slidably attached to the upper mold clamp is moved using a lever and inserted into the groove provided in the upper mold to support the upper mold and prevent the upper mold from falling, and the upper mold is inserted. Slide it on the claw to remove it. Or detach it from the bottom of the machine. The lever is rotatably attached to the upper mold clamp and is fixed or unfixed by an attachment/detachment means.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, a plurality of upper molds 1 of the press brake press and fix upper mold clamping fittings 3 to a ram 7 by means of tightening bolts 5. As shown in FIGS. A groove 9 is provided in the upper die 1 along the left-right direction of the machine.

The lever 11 is supported by the upper mold clamp 3 by pins 13 at support portions near the center of both sides.
It can be rotated as shown by the arrow using the fulcrum as the fulcrum. The upper side of the lever 11 is positioned so as to engage with a stopper 17 of an attachment/detachment means 15, which will be described later. Lever 11
Connecting pins 19 driven into the claw portions 21 are fitted near the terminals of both sides. (Left reference diagram)
Connecting pins 19 at both ends of the lever 11 are positioned to move the claw portion 21 in the longitudinal direction of the machine.
A stop pin 23 for setting the pivoting position of the lever 11 is mounted on the side surface of the upper mold clamp 3.

The attachment/detachment means 15 is formed mainly of a stopper 17 and a stopper lock 33.

As shown in FIGS. 3 and 4, the stopper 17 has a disk portion 27 and a shaft portion 29 integrally formed. The shaft portion 29 is supported within the upper mold clamp 3 so as to be slidable in the vertical direction. A compression spring 31 is provided to engage with the shaft portion 29 and urge the shaft portion 29 upwardly to move it.

As shown in FIGS. 5 and 6, the disk portion 27 is formed by cutting one side of its circumference into a straight line.
A stopper lock 33 is disposed within the upper mold clamp 3 at a position where it engages with the disk portion 27. The stopper lock 33 is separated from the disk portion 27 and does not engage when the disk portion 27 is rotated and faces the straight portion on the circumference. The stopper lock 33 engages the disc part 27 when the disc part 27 is rotated and faces the circumferential part,
The disk portion 27, ie, the stopper 17, is formed to prevent upward movement.

As shown in FIGS. 7 and 8, the upper mold clamp 3 is attached to the surface of the upper mold clamp 3 in which the claw portion 21 is in contact with the upper mold 1.
It is slidably supported within the machine along the front-rear direction.

In this embodiment, one claw portion 21 is provided for each upper mold. Further, four compression springs 35 are provided for each claw portion 21.

The claw portion 21 is positioned such that it can be removably inserted into the groove portion 9 of the upper mold 1. The claw portion 21 is formed to engage with and bias a compression spring 35 to slide along the longitudinal direction of the machine. A connecting pin 19 whose both ends are supported by both ends of the lever 11 is driven into the claw portion 21 . By rotating the lever 11, the connecting pin 19 can change the sliding length of the claw portion 21 inside the upper mold clamp 3 along the machine longitudinal direction.

As shown in FIG. 2, in order to remove the upper mold 1 from the state in which the upper mold 1 is pressed and fixed to the ram 7 side by the upper mold clamp 3, the tightening bolts 5 are loosened. At this time, the stop pin 37 provided on the surface of the tightening bolt 5 engages with the ram 7 and cannot be loosened beyond the set length. The upper mold 1 is released from the pressure of the upper mold clamp 3, but the claw 21 is pressed into the groove 9 of the upper mold 1 by the compression spring 35, so the upper mold 1 is supported by the claw 21. Don't fall. Since the upper mold 1 is movable in the horizontal direction while being supported by the claws 21, the upper mold 1 can be removed from the side of the machine by sliding it.

When multiple upper molds 1 are attached to the ram 7, in order to remove the upper mold 1 attached to the center from the machine without removing the adjacent upper molds 1, tighten the mounting bolts 5 as described above. Loosen. At this time, the distance between the upper mold 1 and the lower mold 39 is kept large enough to allow the upper mold 1 to be removed. As described above, since the claw portion 21 is pressed into the groove portion 9 of the upper mold 1, the connecting pin 19 driven into the claw portion 21 is drawn toward the upper mold 1 side together with the claw portion 21.
The lever 11 supporting the connecting pin 19 is the pin 1
3 as a fulcrum, and the upper side of the lever 11 rotates in a direction away from the ram 7, as shown in FIG.
As shown in FIG. 4, the lever 11 is placed on the stopper 17. At this time, the disc portion 27 is locked to the stopper lock 33 as shown in FIG. The disc part 27 is rotated so that the cut straight part of the disc part 27 is positioned opposite to the stopper lock 33 as shown in FIG. 6, and the lever 11 is pushed to rotate it in the direction of the ram 7. The stopper 17 pressed by the lever 11 is projected upward by the compression spring 31 and moved, and the upper side of the lever 11 is pressed against the ram 7 by the projected stopper 17 as shown in FIG. The other end of the lever 11 that rotates around the pin 13 is the ram 7.
Since the connecting pin 19 rotates away from the side, the connecting pin 19 moves away from the upper mold 1, and the connecting claw portion 21 slides along the moving direction of the connecting pin 19 against the bias of the compression spring 35. let The claw portion 21 escapes from the groove 9 of the upper mold 1, and the upper mold 1 supported by the claw portion 21 becomes detached from the support of the claw portion 21 and can fall, and the upper mold 1 is removed to the lower side of the upper mold clamp 3. . Therefore, the central upper mold 1 can be removed without removing the adjacent upper mold 1.

When the upper mold 1 is installed from the side of the machine and the claw part 21 is retracted into the upper mold clamp 3, the upper mold 1 is attached with the claw part 21 in the protruding state as shown in FIG. The groove part 9 is supported by the claw part 21, and the upper mold 1 is slid on the claw part 21 and attached to a predetermined position. At this time, in order to make the claw portion 21 protrude, the stopper 17 protruding upward is pressed and lowered downward. The upper part of the lever 11 can be rotated away from the ram 7, and the claw part 21 connected to the connecting pin 19 at the other end of the lever 11 is connected to the compression spring 35.
It is biased by and protrudes. For this reason, lever 11
The upper part rotates and rests on the stopper 17. Rotate the disc part 27 and use the stopper lock 33 to lock the disc part 27.
is locked and the upper mold 1 is slid on the claw portion 21.

In order to attach the upper mold 1 from the lower side of the upper mold clamp 3, it is sufficient to attach the upper mold 1 with the claw portion 21 retracted into the upper mold clamp 3.

As described above, when the upper die is attached and detached from the side of the machine, the upper die is supported by the claws 21 and does not fall, so the distance setting work of bringing the upper die closer to the lower die is no longer necessary. becomes unnecessary. When removing the central upper mold among the plurality of upper molds, no distance setting work is performed, so only the desired upper mold is removed below the upper mold clamp, and there is no need to remove adjacent upper molds. As described above, it is possible to shorten the time required for attaching and detaching the upper mold and improve work efficiency.

[Effect of idea]

As is clear from the above explanation, according to the present invention, the work of attaching and detaching the upper mold eliminates the need to set the distance between the upper mold and the lower mold, and also eliminates the need to remove the upper mold other than the upper mold to be removed. It is possible to shorten the time and improve work efficiency. Furthermore, it is possible to prevent the upper mold from falling, thereby preventing damage to the lower mold and increasing the effect of preventing work hazards.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a left side view of Fig. 1, Figs. 3 and 4 are explanatory diagrams showing the positional relationship between the lever and the detachable means, and Fig. 5 , 6th
7 is an enlarged explanatory view of the connecting portion between the upper mold clamp and the upper mold, and FIG. 8 is a cross-sectional view taken along the line shown in FIG. 7. 1... Upper die, 3... Upper die clamp, 5... Tightening bolt, 7... Ram, 9... Groove, 11... Lever, 13, 23, 37... Pin, 15... Attaching/detaching means, 17...stopper, 19...connection pin, 21
...Claw part, 27...Disc part, 29...Shaft part, 3
1, 35...Compression spring, 33...Stopper lock, 39...Lower mold.

Claims (1)

[Scope of utility model registration request] The press brake has an upper mold clamp that presses and fixes the upper mold to the ram, and a lever that is rotatable with its both side support parts supported by the upper mold clamp, and one end of the lever that rotates is attached to the upper mold clamp. an attachment/detachment means for fixing to or releasing the fixation to the upper mold clamp; and a claw portion slidably supported within the upper mold clamp;
The lever engages with the rotation of the lever and an elastic member supported within the lever to be removably inserted into a groove provided in the upper mold, thereby supporting or releasing the upper mold. An upper mold clamp having a mechanism for preventing the upper mold from falling of a press brake, characterized by comprising a claw part.