JPS624346Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a feed bar joint for a press machine.

Conventionally, various types of feed bar joints have been devised.

The feed bar is divided into the feed bar on the take-out side, which is replaced together with the mold, and the feed bar on the remaining side, which is left in the press machine section.The feed bar on the take-out side is attached to a pin installed on the feed bar on the remaining side, and the lifting operation of the bolster is performed. Many devices are used that can be attached and detached using the . In this case, since the amount of attachment depends on the lifting stroke of the moving bolster, the lifting stroke must be large in order to achieve a sufficient connection.

The present invention provides a feed bar joint that can be completely installed even when the lifting amount is small.

That is, a joint that is not affected by the amount of elevation of the moving bolster can be obtained.

The present invention will be explained based on the drawings of one embodiment.

In the feed bar of a press machine, the feed bar is replaced with the mold 1 at the take-out side feed bar 2, and the remaining side feed bar 3 is left in the press machine section.
The connection surface 4 of the feed bar 3 on the remaining side and the feed bar 2 on the take-out side is inclined outwardly, and the feed bar 2 on the take-out side is latched to the feed bar 3 on the leave side at the connection surface 4. A hooking part 5 is provided, a clamping piston 6 is provided in the first cylinder part 3a of the feed bar 3 on the remaining side, and a clamping head 7 is fixedly installed at the tip of the piston rod 6a of the clamping piston 6. A tunnel 2a, which is a horizontal cutout of the feed bar 2 on the take-out side, for accommodating the head 7 is provided in the feed bar 2 on the take-out side.

On the other hand, the second cylinder portion 3b of the remaining feed bar 3 is provided with a positioning piston 8, and the piston rod 8a of the positioning piston 8 is connected to the clamping piston 6 and its piston rod 6.
a, and can be inserted into a hole 2b provided in the take-out feed bar 2, and the clamp is inserted into each cylinder portion 3a, 3b in which the clamping piston 6 and the positioning piston 8 are housed. Ports 9 are provided on the remaining feed bar 3 for supplying pressure oil for urging the positioning piston 6 in the unclamping direction and the positioning piston rod 8a in the direction of coming out of the take-out feed bar 2, respectively. This is a feed bar joint for a press machine, characterized in that springs 10 and 11 are provided for biasing 8 in a direction opposite to the direction in which the pressure oil is biased.

Next, the operation of the present invention will be explained.

When fluid pressure is supplied through port 9, spring 10 is compressed, and then spring 11 is compressed. That is, the clamp piston 6 moves to the right in the figure, and the clamp head 7 separates from the clamp surface 2c of the feed bar 2 on the take-out side, resulting in an unclamped state. Next, the positioning piston 8 moves to the left in the figure and comes out of the hole 2b of the feed bar 2 on the take-out side. In this state, the feed bar 2 on the take-out side can freely move in the longitudinal direction of the lower surface of FIG.

When positioning and clamping, place the center of the feed bar 2 on the take-out side almost on the center of the positioning piston 8, and when fluid pressure is extracted from the port 9, the spring 1
0 is extended, the clamping piston 2 is pushed into the hole 2b of the feed bar 2 on the take-out side, and then the spring 11
extends and clamps the feed bar 2 on the take-out side.

The strengths of the springs 10 and 11 are selected so as to achieve the above movement.

According to the present invention having the above-described configuration and operation,
Since it does not utilize the raising and lowering motion of a moving bolster like the conventional one, even when the amount of raising and lowering is small, the feed bar on the take-out side can be completely attached and detached from the feed bar on the remaining side.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of a press machine showing a state in which the feed bar on the remaining side and the feed bar on the take-out side are connected according to the present invention, and the feed bar is about to be taken out together with the mold. A simplified side view for explaining the state in which the feed bar and the feed bar on the take-out side are connected, Figure 3 is A of Figure 2.
4 is a sectional view taken along the line B-B in FIG. 3, 1 is the mold, 2 is the feed bar on the take-out side, 3 is the feed bar on the remaining side, 4 is the connecting surface, and 5 is the latch. , 6 is a clamping piston, 7 is a clamp head, 8 is a positioning piston, 9 is a port, 10 is a spring,
11 is a spring.

Claims (1)

[Scope of utility model registration request] The feed bar of the press machine is divided into the feed bar on the take-out side, which is replaced together with the mold, and the feed bar on the remaining side, which is left in the press machine, and the connecting surface of the feed bar on the remaining side and the feed bar on the take-out side is oriented outward. A latching part for latching the take-out side feed bar to the leaving side feed bar is provided on the inclined surface part, a clamping piston is provided on the cylinder part of the leaving side feed bar, and a piston rod tip of the clamping piston is provided with a latching part for latching the takeout side feed bar to the leaving side feed bar. A clamp head is fixedly installed, and a tunnel, which is a horizontal notch for accommodating the clamp head, is provided in the feed bar on the take-out side.On the other hand, a positioning piston is provided in the cylinder portion of the feed bar on the remaining side, and a piston rod of the positioning piston is provided. slidably passes through the clamping piston and its rod;
Further, the positioning piston rod can be freely inserted into a hole provided in the feed bar on the take-out side, and the positioning piston rod is brought out with the clamp piston oriented in an unclamping direction into the respective cylinder portions in which the clamp piston and positioning piston are housed. A port is provided on the remaining side feed bar for supplying pressure oil that urges the pressure oil to exit from the side feed bar, and a spring is provided that urges both pistons in a direction opposite to the direction in which the pressure oil is urged. A feed bar joint for a press machine featuring the following.