JPS6016437Y2 - Misfeed detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device used in a press for detecting misfeed of a plate material fed to the press.

As a conventional detection device, as shown in FIG.
The structure is such that the movement of the pilot pin 1 is detected by a detection pin 3 whose end face is in contact with the side recess of the pilot pin 1, which is provided to be able to rise and fall freely, and the movement of the detection pin 3 is detected by a detection micro switch. Ta.

That is, if the pilot pin 1 cannot enter a hole previously provided in the plate material (in the case of misfeed), the pilot pin 1 moves relative to the upper die 15.

This movement was detected by a detection microswitch 14 via a detection pin 3, and the press was stopped.

The problem with the conventional device described above is that since the detection microswitch 14 is attached to the upper die, it may malfunction due to vibrations of the press slide.

This was especially noticeable in high-speed presses.

The present invention has been made to solve this problem.

Hereinafter, the present invention will be explained based on the drawings, which are one embodiment.

The present invention has a structure in which the movement of the pilot pin 1 provided on the upper mold is detected through a wire member, and the detection microswitch 14 is mounted in a place with little vibration.

In FIG. 1, an upper mold 15 and a lower mold 17 face each other and are fixed to a press slide 16 and a press bolster 18, respectively.

The pilot pin 1 is provided on the upper mold 15 so as to be movable up and down, and is urged by a spring 2 so that the tip of the pilot pin 1 protrudes from the upper mold.

A hole corresponding to this pilot pin 1 is provided in the lower die 17.

The detection pin 3 is slidably held by the upper mold 15, and its end surface is shaped to contact a recess provided in the side surface of the pilot pin 1.

The hose 9 is connected to the upper mold 15 by joints 7, 6.4, and likewise to the main body 12 by joints.

The wire 8 has its end surface in contact with the end surface of the detection pin 3,
The other end surface is in contact with one end surface of the piston 13 built into the main body 12.

For the wire 8, a wire with as little expansion and contraction as possible is used.

The detection microswitch 14 is fixedly installed in a place with little vibration, for example, on the frame of the press, and its tentacles are attached to the piston 1.
It is in contact with the end surface of No.3.

The detection microswitch 14 only needs to be a detector, and a proximity switch or the like may be used.

The float 11 is built into the main body 12 so as to be able to move up and down, and oil at the bottom of the float 11 communicates with an oil chamber on the right side of the piston 13.

Pressure air is supplied to the chamber above the float 11.

A coil spring may be used as the means for biasing the wire member toward the detection pin 3.

The effect will be explained below.

(a) Condition before operation The float 11 is pushed downward by pressurized air, and the oil pushed by the float 11 urges the piston 13 toward the wire.

Detection pin 3 is passed through a wire, and pilot pin 1
It is in contact with the recess of.

Since the detection microswitch 14 is not pressed by the piston 13, it is in the "OFF" state.

(b) If the pilot pin 1 cannot enter the hole in the plate material 19 in the case of misfeed (
When the plate is not fed the correct length), the pilot pin 1 is pushed by the plate and remains in place.

Since the upper mold 15 descends leaving the pilot pin 1 behind, the pilot pin 1 appears as if it had been raised relative to the upper mold 15, so the detection pin 3 comes out of the recess of the pilot pin 1 and Moves by being pushed laterally by the sides.

As the detection pin 3 moves, the wire 8 and the piston 13 move, and as a result, the detection microswitch 14 turns rON.
It becomes yo.

This signal causes the press to stop.

Since the present invention has the above-described configuration, the detection microswitch 14 is not fixedly installed in a place with a lot of vibration as in the past, so it does not malfunction and misfeed can be detected stably. Become.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view, Figure 2 is a front view of the conventional device, 1 is a pilot pin, 2 is a spring, 3 is a detection pin,
4 is joint, 5 is wire cover, 6 is joint,
7 is a joint, 8 is a wire, 9 is a hose, 10 is a lid, 11 is a float, 12 is a main body, 13 is a piston, 14
15 is an upper mold, 16 is a slide, 17 is a lower mold, 18 is a bolster, and 19 is a plate material.

Claims (1)

[Claim for Utility Model Registration] In a device used in a press to detect misfeed of a plate material, (a) detection of movement as the pilot pin 1 moves up and down when attached to a recess provided on the side surface of the pilot pin 1; Pin 3 (b) A wire member that is slidably housed in the hose 9, contacts the end face of the detection pin 3, and moves in the longitudinal direction as the detection pin 3 moves (c) One end face of the wire member a piston 13 that is in contact with the piston 1 and moves as the wire member moves;
A misfeed detection device characterized in that it has the above-mentioned (a), (b), (c), and (4) means for biasing the piston 13 toward the wire member.