JPS6331864Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hydraulic device for compression connection of power transmission lines, distribution lines, etc., and cutting of various branch line rods, bolts, stranded wires, etc.

The die 11 for cutting rods, electric wires, etc. is the third die.
As shown in the figure, it has a roughly semi-cylindrical shape and has a blade 12.
and an arcuate back surface 13. Step portions 14 are formed at both end edges of the back surface 13. The cutting device 18 to which this is attached is as shown in FIG.
A pair of dies 11 are held vertically facing each other, and the lower die 11 is raised to cut power lines, rods, etc. between the upper and lower dies. Cutting device 18
The upper and lower die holding recesses 19 have the same circular arc shape corresponding to the die 11, and are provided with engaging protrusions 20 on both edges to engage with the step portions 14 on both sides of the die. Note that the lower holding recess 19 is provided in a ram 21 inserted into the hydraulic cylinder of the cutter 18 so as to be able to move up and down, and the upper holding recess 19 is provided in the frame 22 of the cutter 18. In such a cutter 18, when cutting an object to be cut such as a rod W, if the rod W is placed in a position offset from the center of the cutting blade of the die 11, the pressure between the upper and lower dies will be reduced during cutting. As a result, a rotational force F is applied to the dice 11 as shown by the arrows. However, dice 11
Since the stepped portion 14 only contacts and engages one side of the engagement protrusion 20, all the rotational force generated by compression is applied to one engagement protrusion 20 (on the left side in the figure). becomes. For this reason, the engaging protrusion 2
There is a problem that the zero is easily damaged by a force exceeding its strength, and cannot withstand long-term use.

The present invention was developed by focusing on these conventional problems, and aims to solve the above problems by forming an engaging groove on the die that fits with the engaging protrusion 20. There is.

Embodiments of the present invention will be described below with reference to the figures. FIG. 1 shows a die 1 for a cutter according to the present invention.
The die 1 has a blade 2 and an arcuate back surface 3.
has. At both end edges of the back surface 3 on the tip side of the blade 2, engagement grooves 4 extending in the insertion direction of the die 1 are formed. As shown in FIG.
0 can be fitted.

Next, the effect will be explained. As shown in Figure 2, Rod W
When cutting is performed while the die 1 is placed at a biased position with respect to the die 1, a rotational force F as shown by the arrow is applied to the die 1. One-half of this rotational force is received by the left engagement protrusion 20, and the other half is received by the edge of the die 1. Therefore, the strength of the engagement protrusion 20 is 1/ of the expected die rotation force F.
It is sufficient that it can withstand the force of 2.

The same applies to the compression die.

As described above, the present invention includes a ram 21 that reciprocates within a cylinder using hydraulic pressure, and a frame 22 that is provided to face the ram 21. Each die 1 has an arcuate back surface 3 corresponding to the holding recess 19 on the side opposite to the direction of cutting or compression operation, and the die 1 is 21 or the frame 22 in a direction perpendicular to the direction of the cutting or compression operation, on both sides of the holding recess 19 of the ram 21 and the frame 22 near the ends in the direction of the cutting or compression operation. form engagement protrusions 20, 20 extending in the insertion direction of the die 1, and engagement protrusions 20 of the ram 21 or the frame 22 are formed on both sides near the end of the die 1 in the direction of cutting or compression operation. Since we adopted a structure in which engaging grooves 4, 4 extending in the insertion direction of the die 1 are formed to slidably receive the die 1, even if rotational force is applied to the die 1 due to cutting or compression operations, it will not be engaged. The engaging protrusions 20 and the edge of the die will receive the engaging protrusions in a distributed manner, thus reducing the risk of breakage of the engaging protrusions 20 by half, resulting in an effect that the engagement protrusions 20 can withstand long-term use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the die of the present invention, FIG. 2 is a front view of the die in an attached state, FIG. 3 is a perspective view of a conventional die, and FIG. 4 is a front view of the die in an attached state. 1...Dice, 3...Back surface, 4...Engagement groove,
18... Cutting device, 19... Holding recess, 20... Engaging protrusion.

Claims (1)

[Claims for Utility Model Registration] The device is equipped with a ram 21 that reciprocates by hydraulic pressure and a frame 22 provided to face the ram 21, and the die 1 is held in the mutually opposing portion of the ram 21 and frame 22. Each die 1 has a holding recess 19 on the side opposite to the cutting or compressing direction.
An arcuate back surface 3 corresponding to 9 is formed, and the die 1
In a hydraulic device in which the ram 21 or the frame 22 is inserted into or extracted from the ram 21 or the frame 22 in a direction perpendicular to the cutting or compression operation direction, the holding recess 19 of the ram 21 and the frame 22
Engagement protrusions 20, 20 extending in the inserting direction of the die 1 are provided on both sides near the end in the direction of the cutting or compression operation, and on both sides near the end in the direction of the cutting or compression operation of the die 1. , the ram 21 or the frame 2
A hydraulic device for cutting or compression, characterized in that it is provided with engagement grooves 4, 4 extending in the insertion direction of the die 1 to slidably receive the engagement protrusions 20 of the die 1.