JPS592908Y2 - Claws for conveying goods in cold forging - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a claw for conveying articles in cold forging.

Conventionally, when feeding a material to a cold forging press, even if the material is not in its normal position and is clamped in a fallen position, there is no proper detection device on the conveying claw, so even though it is a misgrip, it is recognized as normal feed. Continuing press operation sometimes caused problems.

The present invention aims to eliminate this drawback and provide a claw for conveying articles in cold forging that has a misgrip detection device that issues a signal indicating that press operation is OK only when a proper material is clamped in a normal posture. .

To explain the drawings of an embodiment of the present invention, a Y-shaped nozzle 6 having a first opening a, a second opening b, and a third opening C is attached to a fixed claw 4 of a claw for conveying material in cold forging. 1st
The opening a is fixed as the inside of the nail, the second opening b and the third opening C are fixed as the outside, the second opening is used as the air supply port, the third opening C is used as the exhaust port, and the first opening a is in the normal posture. When material 2 is held in the mouth, the air is closed and the air that enters through the second opening is exhausted through the third opening C without any pressure drop. However, if there is a misgrip, the first opening a As shown in Fig. 1, a float 7 is provided to detect the differential pressure, and the differential pressure can be detected electrically. This is used to replace the signal and issue a press operation stop signal to stop the press.

When the material 2 is clamped in the normal posture, the first opening a is blocked by the material 2 and almost no differential pressure is generated, so the press operation can be continued without issuing a press operation stop signal. There is.

The variable orifice 8 is provided to adjust in advance the pressure on the f side during normal clamping so that it becomes the same as the pressure on the e side when the supply pressure p from the air source 9 is exhausted through the nozzle 6. It is.

According to the present invention, if the material to be clamped is not clamped in a normal posture, it will not block the first opening a of the nozzle 6, so it can also be detected that the material is clamped in a fallen position, unlike the conventional method. Since the press is stopped, incorrect conveyance and press accidents can be prevented.

[Brief explanation of the drawing]

Figure 1 is for explaining one embodiment of the present invention. Figure 1 is a chute, 2 is a material, 3 is a plate, 4 is a fixed claw, 5 is a movable claw, 6 is a nozzle, 7 is a float, 8 is a variable orifice, 9 is a It is an air source.

Claims (1)

[Scope of utility model registration request] A claw for transporting a material in cold forging includes a fixed claw that positions the material and a movable claw that presses and holds the material on the fixed claw, and the inner position of the fixed claw where the material is positioned by the movable claw. a nozzle having a first opening, a nozzle communicating with the first opening and having a second opening and a third opening on the outside of the fixed claw, the second opening being connected to an air source, and a third opening; An article conveying claw in cold forging, characterized in that the claw is connected to a float that detects the differential pressure between the exhaust pressure of the third opening and the supply pressure of the air source and outputs it as an electric signal.