JPS6243618Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a die clamper device used in a press.

Conventionally, a die clamper device used in a press machine has a hydraulic cylinder 2 fixedly installed in a side notch of a bolster 1, and a clamp rod 4 rotatably connected to a piston rod 3 of the hydraulic cylinder 2, as shown in Fig. 1. , as the piston rod 3 moves, the clamp rod 4 comes into contact with the side surface of the clamp rod 4.
A guide roll 5 is provided which applies a force to make the piston rod stand up, and a leaf spring 6 is provided which is fixed to the upper end of the clamp rod 4, the tip of which is in contact with the side surface of the piston rod 3, and which applies a force in the direction of tilting the clamp rod. Ta.

In this structure, since the guide roll 5 is provided outside the clamp rod 4 with respect to the bolster 1, the leaf spring 6 must be provided inside the clamp rod 4, but in order for the leaf spring 6 to exert the required biasing force, the leaf spring 6 must be provided inside the clamp rod 4. A considerable height is required from the inner side surface of the clamp rod 4, and the depths of the notch 1a of the bolster 1 that accommodates the clamp rod 4 and the notch 7a of the common plate 7 of the mold to be clamped must be made large. The large size of the notches 1a and 7a has the disadvantage that the shape and dimensions of the mold are limited.

The purpose of the present invention is to eliminate this drawback by providing a push-up pin that can be raised and lowered on the bracket protruding from the piston rod, applying a biasing force with a spring to press the lower end surface of the clamp rod, and applying a force in the direction of tilting the clamp rod. Accordingly, it is an object of the present invention to provide a die clamper device that reduces the size of the notch in the common plate of the bolster and the mold, and alleviates restrictions on the shape and dimensions of the mold. Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, a hydraulic cylinder 2 is fixedly installed in a notch 1a of a press bolster 1. As shown in FIGS. A bifurcated lower end portion of a clamp rod 4 is rotatably attached to the tip of the piston rod 3 of the hydraulic cylinder 2 by a pin 8. When the clamp rod 4 stands up, the clamp rod 4
is in contact with the outer surface of A guide roll 5 is rotatably held by a plate 9. The plate 9 is movably fitted into a bolt 11 set upright on a bracket 10 fixed on the hydraulic cylinder 2, and is fitted with a spring 12.
is pressed against the surface of the bracket 10. A stopper pin 13 is provided upright at the lower end of the clamp rod 4, and is adapted to come into contact with the side surface of the piston rod 3 when the clamp rod 4 is in the upright position.

A push-up pin 15 is provided on a bracket 14 fixed to the piston rod 3 so as to face the rear part of the lower end surface of the clamp rod 4, and a push-up pin 15 is provided so as to be able to move up and down.
is interposed between the bracket 14 and the stepped end portion of the push-up pin 15, and presses the push-up pin 15 toward the lower end surface of the clamp rod 4. The hydraulic cylinder 2 has a port 17 communicating with the upper cylinder chamber,
A port 18 communicating with the lower cylinder chamber is provided.

Next, we will discuss the effect. 2 and 3, pressure oil is supplied from the port 17 of the hydraulic cylinder 2 to the upper cylinder chamber, and the clamp rod 4 is connected to the common plate 7 of the mold (not shown) after being erected.
The figure shows the state in which it is clamped (clamped) to the bolster 1. When unclamping the clamp rod 4, oil is drained from the port 17 of the hydraulic cylinder 2, and pressure oil is supplied from the port 18 to the lower cylinder chamber.
The piston rod 3 rises and the clamp rod 4 unclamps the common plate 7. When the center of the pin 8 rises above the center position of the guide roll 5 that is in contact with the side surface of the clamp rod 4, the clamp rod 4 rotates so as to project outward from the notch 7a due to the urging force of the push-up pin 15. At the upper limit of the piston rod 3, it stops at the position shown by the one-dot chain line in FIG. Conversely, when clamping,
Drain oil from port 18, refuel from port 17,
Lower the piston rod 3.

While the side surface of the fallen clamp rod 4 is in contact with the guide roll 5, the force of the spring 12 urging the guide roll 5 is greater than the force of the coil spring 162 urging the push-up pin 15. The clamp rod 4 rotates so as to enter the notch 7a, and when the center of the pin 8 descends beyond the center position of the guide roll 5, the clamp rod 4 stands up completely and the stopper pin 13 comes into contact with the inner surface of the piston rod 3. The standing position is regulated. The piston rod 3 further descends while maintaining the same posture, and the clamp rod 4 clamps the common plate 7 and stops. The distance between the line of action of the force of the push-up pin 15 and the center of rotation of the clamp rod 4 may be small since the rotational resistance of the clamp rod 4 is small.

As is clear from the above explanation, according to the present invention, there is nothing protruding from the clamp rod toward the inside of the notches 1a and 7a, so the notches 1a and 7a are
Since the depths of a and 7a are small, and the push-up pin 15 and coil spring 16 are provided below the bifurcated portion of the clamp rod 4, there is no protrusion on both sides of the pin 8 in the axial direction. The upper surface of the bolster and common plate of the mold can be used effectively, the dimensions and shape of the mold are less restricted, and the mold can be clamped with the clamp rod 4 not fully erected for some reason. Even if the guide roll 5 is pushed outward, the guide roll 5
The practical effects and advantages are extremely large, such as the fact that it escapes due to No. 2 and is not damaged.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is a vertical sectional side view of an embodiment, and FIG. 3 is a partially sectional front view excluding a guide roll portion. 1 is a bolster, 1a is a notch, 2 is a hydraulic cylinder, 3 is a piston rod, 4 is a clamp rod,
5 is a guide roll, 6 is a leaf spring, 7 is a common plate, 7a is a notch, 8 is a pin, 9 is a plate,
10 is the bracket, 11 is the bolt, 12 is the spring,
13 is a stopper pin, 14 is a bracket, 15 is a push-up pin, 16 is a coil spring, 17 is a port,
18 is Poot.

Claims (1)

[Scope of utility model registration request] A hydraulic cylinder 2 is fixedly installed in the notch 1a of the press bolster 1, and the bifurcated portion of the base is rotatably connected to the tip of a piston rod 3 extending upward from the hydraulic cylinder 2, and the tip is connected to the mold. A clamp rod 4 is provided which can be engaged with and locked in a part of the clamp rod 4, and is movably provided so as to be in contact with the side surface of the falling side of the clamp rod 4 and biased toward this side surface by a spring 12. It also includes a guide roll 5 for raising the clamp rod 4, and a push-up pin 15, which is provided on the side surface of the piston rod 3 under the upward biasing force of a coil spring 16, and pushes up the bifurcated lower surface of the clamp rod 4 to bring it down. A die clamper device characterized by: