JPS6320414Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mold attaching/detaching device in a press machine, and more specifically, a locking member for fixing the mold is provided on one side wall for fixing the mold, and a locking member for fixing the mold is provided. A sliding member for separating the locking member from the mold is provided in the longitudinal direction of the mold, and the locking member and the sliding member are brought into contact with a guide surface provided correspondingly to the guide surface member. Therefore, the present invention relates to a mold attaching/detaching device for fixing and releasing a mold.

Conventionally, among press machines, for example, in a press brake equipped with a die that is long in the direction of the bending line, a stepped part is provided in the die as a means for fixing the die to an upper frame or a lower frame. It was fixed with bolts or other fasteners in the width direction perpendicular to the

Therefore, when replacing a mold, it was necessary to loosen the fasteners and then move the mold in its longitudinal direction to remove it, which was a difficult and dangerous task since the mold was a heavy object. It is.

The present invention has been made for the purpose of solving the above-mentioned disadvantages of the conventional apparatus, and preferred embodiments thereof will be described in detail below with reference to the drawings.

FIG. 1 shows a press brake 1 as an example of a press machine.

The press brake 1 has a lower mold 5, which is one of the molds, fixed above the machine base 3, and is guided by the side walls 7, 7 provided on the left and right sides in FIG. A connecting board device 1 is mounted on the lower surface of the upper frame 11, which moves up and down by being driven by the provided fluid pressure cylinders 9.
A mold holder 15 is held through 3 and 13.

Furthermore, as is clear from FIG. 2, an upper mold 17 corresponding to the lower mold 5 described above is detachably attached to the lower end of the mold holder 15 described above.

The second section showing the embodiment device of the present invention in more detail.
In Figures 3, 4, and 5, the upper mold 17 is the mold holder 1.
Side wall 19 of the clevis-shaped groove provided at the lower end of 5.
In this embodiment, two movable locking members 21 are provided on one side of the mold holder 19 on the left and right sides in FIG. 3 for each divided mold holder 15.

The locking member 21 compresses and holds the bullet 23 between it and the side wall 19, and has a projection provided at a position to engage with a longitudinal groove 25 provided in the upper die 17 of the locking member 21. 27 positions the upper die 17.

At the end of the locking member 21 opposite to the end where the protrusion 27 is provided, a guide surface 29 is provided which is inclined in one direction at an α angle of less than 45 degrees, as shown in FIG.

In addition, in this embodiment, the divided mold holder 15
A round hole 31 parallel to the longitudinal direction of the upper mold 17 is provided at the position of the guide surface 29 described above, and a sliding member 33 is provided within this round hole 31 to be able to slide freely in the left-right direction in FIG. There is.

This sliding member 33 has a knob 35 screwed therein approximately in the center thereof, which protrudes outward through the side wall 19, and a horizontal elongated hole 37 is provided in the side wall 19.

Furthermore, guide surface members 39 are provided at both ends of the above-mentioned sliding member 33 and come into contact with the above-mentioned guide surface 29, and the guide surface members 39 are manually inserted into the elongated hole 37 using the above-mentioned knob 35 as shown in FIG. When it moves to the right, it comes into contact with the guide surface 29 and pushes the locking member 21 upward in FIG. be.

A blind cover 41 that also serves as a spring seat is provided at one end of the round hole 31 (the right end in FIG. 3), and a bullet 43 is placed between the blind cover 41 and the guide surface member 39 at the right end. It is compressed and installed.

Therefore, if you stop manually moving the knob 35 to the right, the sliding member 33 will move to the left by the biasing force of the bullet 43, and the knob 35 will move to the elongated hole 37.
It comes into contact with the left end of , stops, and returns to the state shown in FIG. 3.

The implementation device of the present invention described in detail above operates the fluid pressure cylinders 9, 9, brings the upper mold 17 close to the lower mold 5 and stops the upper mold 17 with no plate material placed between the upper and lower molds,
The upper mold 17 can be released as described above by simply moving the knob 35 from the front through the elongated hole 37 manually, so the upper mold 17 can be lowered a short distance onto the lower mold 5, which is extremely easy and safe. The mold can be removed and a new mold can be installed in the same way.
This made it possible to overcome the inconveniences of the conventional method.

In addition, since the biasing force of the bullet is used to secure the mold to the mold holder, there is no risk of the mold loosening or falling even if a power outage occurs while the press is in operation. Since the angle α between the guide surface and the horizontal direction was set to 45 degrees or less, it was also possible to easily move the knob manually.

It should be noted that although this device is limited to the upper mold in the embodiment, it can also be applied to the lower mold.

[Brief explanation of the drawing]

Fig. 1 is a front view of a press brake implementing an embodiment of the present invention, Fig. 2 is a sectional view around the upper die of this embodiment, Fig. 3 is a cross-sectional view taken along the - sectional arrow in Fig. 2, and Fig. 4. is an enlarged view of the left locking member 33 in FIG.
The figure is a cross-sectional view taken along the - arrow in FIG. 4. Explanatory diagram of symbols representing main parts of the drawings, 1...Press brake, 17...Upper die, 19...Side wall, 2
9... Guide surface, 33... Sliding member, 39... Guide surface member.

Claims (1)

[Claims for Utility Model Registration] 1. A movable member that is parallel to the longitudinal direction of the mold and is slidable in the longitudinal direction is provided on one side wall in the front and back direction of the mold, and a movable member that is slidable in the longitudinal direction is provided in a direction perpendicular to the longitudinal direction of the sliding member. A press machine characterized in that a movable locking member is provided, the locking member is provided with a guide surface, and the sliding member is provided with a guide surface member that is slidable in contact with the guide surface. Mold attachment/detachment device. 2. A mold attaching/detaching device for a press machine as set forth in claim 1 of the registered utility model, characterized in that a bullet is provided for biasing the above-mentioned locking member toward the mold.