JPH0217713Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a clamping device for a moving bolster in a press.

(Conventional techniques and their problems) Conventional techniques for tightening a moving bolster to a press include a manual tightening method, a direct-acting cylinder method, and a rotary cylinder method. The method is suitable for automation and is used in practice. In both of these methods, the cylinder head is hooked into a T-groove provided on the lower surface of the bolster and tightened.

Figure 4 shows a direct acting cylinder system, in which a bolster 2 installed on the bed 1 is movable by wheels 3, and a clamp installed at the tip of a piston rod 5 of a clamp cylinder 4 attached to the bed 1. Insert the head 6 into the T-groove 7 formed on the bottom surface of the bolster. When the bolster 2 reaches a predetermined position, a cylinder for lowering the wheel 3 is provided at that position, so the bolster is lowered at the predetermined position and the clamp cylinder 4 is activated to pull the clamp head 6 downward. A bolster 2 is fixedly pressed onto the bed 1.

In the above-mentioned conventional system, when running on the bolster, it is necessary to lower the T-groove into the groove that runs through the entire width of the bolster in order to release the clamp head. However, due to the dictation device installed inside the bolster, T
If the groove cannot be machined through, or depending on the structure of the moving bolster, to avoid interference,
There were problems such as the mounting position of the clamper was restricted and furthermore, the strength of the bolster was reduced by machining it through the T-groove.

In addition, the rotary cylinder method in the conventional technology is
The clamp head in FIG. 4 is formed into a rod shape,
This allows the piston rod to come out of the T-slot when rotated 90 degrees. Although the above method has the advantage of not requiring threading of the T-slot, it requires an additional action to rotate the piston rod, which makes the rotary clamper expensive, and requires electrical interlocking (for example, a limit switch) to check. There were problems such as an increase in the amount of time required and a long setup time.

The present invention is an attempt to solve these problems of the prior art, and to provide a device that can automatically clamp using a cylinder method without having to machine a T-groove formed for clamping on the lower surface of the bolster. It is something to do.

(Means for Solving the Problems) The specific means for solving the problems of the prior art with the present invention is to provide openings on both sides of the lower surface of the moving bolster provided with wheels for running, and A T-groove is provided in the mold, and the T-groove that opens on at least one side forms a relief hole for the clamp head toward the back of the bolster, and the pressbed is also provided with a T-groove at a position corresponding to the mounting position of the wheel at the normal position of the bolster. In addition to providing a lift cylinder, the T of the bolster
A clamp cylinder is provided at a position corresponding to the groove, and a piston rod with a clamp head provided at the tip protrudes from the clamp cylinder.

(Example) Figure 1 is the overall plan view, Figure 2 is Figure 1 A-A
FIG.

The moving bolster 10 has wheels 11 at the four corners,
11, and is carried into the press bed 12 by running rails 13,13. Presbed 1
2, the wheels 1 of the bolster are placed at the installation position of the bolster.
Lift cylinders 14, 14 are provided on which the wheels 1, 11 are placed, and when it is confirmed that the wheels 11, 11 have reached the top of the lift cylinders 14, 14, the pistons descend to lower the bolster 10, and the 10 is placed directly on the pressbed 12.

At the four corners of the lower surface of the moving bolster 10, there are T-grooves 15, 15, 16, 16 which are open in a direction parallel to the running direction of the bolster and are non-through type.
are provided, and at least one of the T-slots is connected to the relief hole 17 of the clamp head toward the back of the bolster.
17 are provided. In addition, when the press bed 12 reaches the fixed position, the T-groove 15,
Clamp cylinders 18, 18, 19, 19 are provided at positions corresponding to 15, 16, 16,
The clamp cylinders 18, 19 have piston rods 20, which have clamp heads 22, 23 at their upper ends.
21 protrudes upward.

FIG. 1 shows a state in which the moving bolster 10 is installed at a predetermined position on the bed. The T grooves 16, 16 and the clamp cylinders 19, 19 correspond to each other.

The moving bolster 10 is introduced into the pressbed 12 from the front side in FIG. 1 and from the left side in FIG. 2. On the other hand, the clamp cylinder 18,1
Clamp heads 22 and 23 of No. 9 are both lowered. Then, the bolster 10 is carried into the bed 12, and the bolster 10 is stopped just before the home position, that is, when the relief holes 17, 17 reach the tops of the clamp cylinders 18, 18.

Next, when the clamp cylinders 18 and 19 are actuated to raise the clamp heads 22 and 23, the second
The clamp head 22 of the left cylinder in the figure is inserted into the relief hole 17, and the clamp head 22 of the right cylinder is inserted into the relief hole 17.
3 protrudes from the side of the bolster. Then, when the bolster 10 is further moved, both clamp heads 22 and 23 are installed in the T grooves 15 and 16,
This position (the position shown) becomes the normal position of the bolster.

After confirming the proper position of the bolster, the lift cylinders 14, 14 are operated to lower the bolster 10 together with the wheels 11, 11, and at the same time the clamp heads 22, 23 are moved down by the clamp cylinders 18, 19.
Force the bolster downward and set the bolster in place.

Carrying out the bolster 10 is the reverse of the above-mentioned operation, and after releasing the clamp cylinders 18 and 19 and raising the bolster by operating the lift cylinders 14 and 14, the bolster 10 is moved slightly and the clamp head 22 is moved. When guided into the relief hole 17, the bolster is temporarily stopped. After lowering the clamp heads 22 and 23, the bolster is carried out and a new bolster is prepared.

In the example, one T of the relief hole of the clamp head is
Although the holes are formed only in the groove, it is also possible to provide relief holes in both T grooves, and in this case, the holes may be carried in from either direction.

(Effects of the invention) The present invention allows the T-groove to be made into a non-through type by providing T-grooves that open on both sides of the bolster and providing a relief hole for the clamp head in at least one of the T-grooves. As a result, there is an effect that there is no problem in assembling various devices such as a dictation device on the bottom surface of the bolster.

[Brief explanation of the drawing]

Figure 1 is the overall plan view, Figure 2 is Figure 1 A-A
The sectional view and FIG. 3 are side views showing details of the clamp cylinder portion. FIG. 4 is a sectional view showing a clamping situation according to the prior art. 10...Moving bolster, 11...Wheel,
12...Press bed, 13...Traveling rail, 1
4...Lift cylinder, 15, 16...T groove, 1
7... Relief hole, 18, 19... Clamp cylinder, 20, 21... Piston rod, 22, 23
...Clamp head.

Claims (1)

[Scope of utility model registration request] A T-groove that is open on both sides and does not pass through is provided on the lower surface of the moving bolster equipped with wheels for running, and the T-groove that is open on at least one side is connected to the relief hole of the clamp head toward the back of the bolster. In addition, a lift cylinder is provided on the pressbed at a position corresponding to the mounting position of the wheel in the fixed position of the bolster, and a clamp cylinder is provided at a position corresponding to the T groove of the bolster, and a clamp head is attached to the tip of the clamp cylinder. A moving bolster clamping device characterized by a protruding piston rod.