JPS644231Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a die fixing device for a hydraulic compressor used for compressing and connecting electric wires, etc.

In a hydraulic compressor, one of the dies that clamps and compresses an electric wire or the like is fixed, and the other is attached to a ram. At the bottom of the die that is conventionally attached to the ram,
A small diameter cylindrical part with an annular groove is provided on the outer periphery of the tip, which is inserted into an insertion hole drilled in the axial direction of the ram, and then an engagement pin is inserted into a pin hole drilled in the ram perpendicular to this insertion hole. is inserted, and its tip is engaged with the annular groove of the cylindrical part of the die to prevent the die from coming off. In order to facilitate attachment and detachment, the engagement pin is always urged in the insertion direction by a spring, and when the die is removed, the pin is pulled out against the spring force and disengaged from the die. However, such conventional devices have a problem in that the structure of the engaging pin is complicated and manufacturing is not easy. This invention was created by focusing on the above-mentioned problems with conventional die fixing devices.
The purpose is to simplify the structure and facilitate manufacturing by winding the spiral spring for biasing the pin around the outer circumference of the ram.

Embodiments of the present invention will be described below with reference to the figures. A small-diameter cylindrical portion 2 is protruded from the bottom of the die 1.
An annular groove 3 is formed on the outer periphery of the cylindrical portion 2 .

An insertion hole 5 is bored in the tip of the ram 4 in the axial direction so that it can be inserted into the cylindrical portion 2 of the die, and a pin hole 6 is bored in the side surface of the ram 4 perpendicular to the insertion hole 5. Furthermore, a spring locking hole 7 is provided in the opposite part of the pin hole 6.
is formed. One end of the spiral spring 8 is locked in the spring locking hole 7 and wound around the outer circumference of the ram, and a through hole 1 bored in the head of the pin 9 is inserted in the middle of the spiral spring 8.
It passes through 0.

The pin 9 can be inserted into and removed from the pin hole 6 of the ram 4, and its tip can be engaged with the annular groove 3 of the die cylindrical portion 2 when inserted. The pin 9 is always urged in the insertion direction by the spring force of the spiral spring 8.

In this die fixing device, when fixing the die 1, pick up the pin 9 and pull it out from the pin hole 6 against the spring force of the spiral spring 8, and then insert the die cylindrical part 2 into the ram 4. The pin 9 is inserted into the hole 5, and then the pin 9 is released and inserted into the pin hole 6 again, and the tip of the pin 9 is engaged with the annular groove 3 of the die cylindrical portion 2 to prevent it from coming out. The die 1 that has been prevented from coming out in this way has no risk of falling out depending on the attitude of the compressor, and even if the ram 4 is returned with the die 1 biting into the object to be compressed such as an electric wire during compression, the die 1 will not fall out. will not be taken out.

In other embodiments shown in FIGS. 3 and 4, an annular groove 11 that passes over the pin hole 6 is formed on the outer periphery of the tip of the ram 4, and the spring 18 is formed into a flat plate and is engaged with the groove 11. There is. The operation in this case is similar to that of the previous embodiment.

As explained above, in the present invention, the cylindrical part 2 of the die 1 is inserted into the insertion hole 5 bored in the ram 4, and engaged with the pin hole 6 perpendicular to the insertion hole 5 bored in the ram 4. In a die fixing device in which a pin 9 is inserted and the tip of the engagement pin 9 is engaged with an annular groove 3 formed on the outer periphery of the cylindrical portion 2 of the die 1, spiral springs 8 and 18 are provided on the outer periphery of the ram 4. rolled,
The intermediate portions of the spiral springs 8 and 18 are locked to the head of the engagement pin 9, and the engagement pin 9 is always urged in the insertion direction by the spring force, so that the pin 9
It is extremely easy to insert and remove the die 1, and the pin 9 reliably engages with the annular groove 3 of the die cylindrical portion 2.
It has the advantage of being simple in structure, easy to manufacture, and inexpensive.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view, Figure 2 is a front view of the
Figure - sectional view, Figure 3 is a front view of another embodiment,
FIG. 4 is a sectional view of FIG. 3. 1...Dice, 2...Cylindrical part, 3...Annular groove,
4... Ram, 5... Insertion hole, 6... Pin hole, 8,
18... spiral spring, 9... pin.

Claims (1)

[Scope of utility model registration request] Insert the cylindrical part of the die into the insertion hole bored in the ram, removably insert the engagement pin into the pin hole perpendicular to the insertion hole bored in the ram, and insert the tip of the engagement pin into the die cylindrical part. In a die fixing device that engages with an annular groove formed on the outer periphery, a spiral spring is wound around the outer periphery of the ram, and the middle part of the spiral spring is locked to the head of the engagement pin, and the spring force is A die fixing device for a hydraulic compressor, characterized in that the engaging pin is always biased in the insertion direction.