JPH0617181U - Movable die attachment / detachment structure for compression head - Google Patents

Abstract

(57) [Summary] [Purpose] Even if you wear thick safety gloves, you can easily and reliably replace the gloves. [Structure] An insertion hole 9 for inserting a connecting pin 8 projecting from the movable die 3 and a locking hole 10 penetrating outward from the insertion hole 9 are formed at a tip end portion 7 of the piston rod 5. An operating tool 12 is slidably provided on the outer periphery of the distal end portion 7 and has a doughnut-shaped wide locking portion 11 for locking a finger to the outside, and the operating tool 12 projects inward and has a locking hole 10.
An insertion / removal pin 13 that locks the connecting pin 8 is attached through the hole, and the insertion / removal pin 13 of the operation tool 12 is drawn into the locking hole 10 between the operation tool 12 and the tip portion 7. An elastic body 14 that pushes in the direction is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a movable die attaching / detaching structure of a compression head used when a bare electric wire such as a copper wire or an aluminum wire is inserted into a sleeve made of the same material as the electric wire and connected. It is designed to be easy.

[0002]

[Prior art]

 One of the connection methods often used to connect bare wires is called compression connection. As shown in FIG. 4 (a), this is an electric wire (main wire) A that is aerial-wired, and is inserted into an upper groove S of a metal sleeve B made of the same material as that of the electric wire A. (Branching line) C is inserted into the lower groove T of the metal sleeve B, and in this state, the metal sleeve B is compressed from the outside and crushed to connect the electric wires A and C with the metal sleeve B. And what is shown in the same figure (b) is an example of the compression head D of the automatic compression tool used for compression of the metal sleeve B.

In the compression head D of FIG. 4B, a U-shaped fixed die G that encloses the metal sleeve B is attached to the upper portion of the C-shaped clamp die head F, and is attached to the lower portion of the clamp die head F. A movable die H is attached to the front end of the piston rod L of the hydraulic cylinder E.

In this compression head D, when an operator grips an air balloon J extending from a hydraulic pump I arranged on the ground, air is sent from the air balloon J to an air switch U of the hydraulic pump I, The air pushes the air switch U to send a signal to the electric circuit V, and when the motor W rotates, oil is sent from the hydraulic pump I through the insulating hose K to the hydraulic cylinder E of the compression head D. The movable die H is pushed up by the piston rod L with a strong force, and the metal sleeve B arranged between the dies G and H can be compressed.

By the way, various metal sleeves B used for compression connection are prepared according to the application as shown in FIGS. 5 to 7, and for example, electric wires as shown in FIGS. 5 (a) to 5 (f). There are a branch sleeve for connecting the branch electric wire C to A, a linear sleeve for linearly connecting the two electric wires A and C as shown in FIG. 6, and a device sleeve as shown in FIG.

The fixed die G and the movable die H of the compression head D for compressing these various sleeves can be detached and replaced according to the shape of the metal sleeve B to be used. FIG. 8 shows the structure for attaching and detaching the fixed die G of the compression head D. This is because when the fixed die G is pushed in the X direction in the figure and the connecting pin M of the same die G is inserted into the insertion hole N as shown in FIG. Although the tip of the insertion / extraction pin P protruding by is once pushed out by the connecting pin M, when the fixed die G is further pushed in, the engaging recess O formed in the middle of the connecting pin M is pushed. The fixed die G is fixed to the clamp die head F by fitting the tip of the insertion / extraction pin P. Further, as shown in FIG. 8 (b), when the insertion / extraction pin P is pulled in the Y direction in the figure, the connecting pin M fixed by the insertion / extraction pin P comes out in the X direction in the figure. The fixed die G can be removed.

FIG. 9 shows a structure for attaching and detaching the movable die H. As shown in (a) of the figure, when the movable die H is pushed in the X direction in the figure and the connecting pin M of the die D is inserted into the insertion hole N of the piston rod L, the inside of the insertion hole N The tip of the insertion / extraction pin P protruding by the force of the spring is once pushed out by the connecting pin M, but when the movable die H is further pushed in, the locking recess O formed in the middle of the connecting pin M The movable die H is fixed to the piston rod L by fitting the tip of the insertion / extraction pin P into the. Further, as shown in FIG. 9B, when the insertion / extraction pin P is pulled in the Y direction in the drawing, the connecting pin M fixed by the insertion / extraction pin P is pulled out in the X direction in the drawing. The movable die H can be removed.

By the way, the compression work of the metal sleeve B is often performed in a live-line state in which a high-voltage current is flowing through the electric wire A. Therefore, the compression die head F and the cylinder E of the compression head D are illustrated. Not covered with insulating cover. For safety, the worker who operates the compression head D wears thick rubber safety gloves for the work.

[0009]

[Problems to be solved by the device]

 However, in the structure for attaching and detaching the die of the compression head shown in FIGS. 8 and 9, in order to remove the fixed die G and the movable die H, the insertion / extraction pin P must be pinched with a finger and pulled out. Further, since the worker wears thick rubber safety gloves, it is difficult to pinch the insertion / extraction pin P with his / her finger, and the workability is poor. Moreover, at this time, if you drop the die from a high place where detachment work is done, it may be dangerous to hit the person working on the ground, so hold it with your fingers so that you do not drop it and replace it. I had to do this, but this was also very difficult because I wore safety gloves.

An object of the present invention is to provide a movable die attachment / detachment structure for a compression head, which enables easy and reliable exchange of the movable die even while wearing thick safety gloves.

[0011]

[Means for Solving the Problems]

 As shown in FIGS. 1 to 3, the movable head attaching / detaching structure of the compression head of the present invention is such that a fixed die 2 and a movable die 3 are attached to a clamp die head 1 so as to face each other. In the compression head in which the metal sleeve 6 disposed between the dies 2 and 3 is compressed when pushed out by the piston rod 5 of the hydraulic cylinder 4 on the base side, the movable die 3 is attached to the tip portion 7 of the piston rod 5. An insertion hole 9 for inserting the connecting pin 8 protruding from the insertion hole and a locking hole 10 penetrating outward from the insertion hole 9 are formed. An operation tool 12 provided with a wide locking portion 11 that can be stopped is slidably provided, and the operation tool 12 projects into the operation tool 12 and penetrates the locking hole 10 to lock the connecting pin 8. Take An elastic body 14 is provided between the operation tool 12 and the tip portion 7 to push the operation tool 12 in a direction in which the insertion pin 13 is pulled into the locking hole 10. Is.

[0012]

[Action]

 In the structure for attaching and detaching the movable die of the compression head of the present invention, as shown in FIG. 3 (b), a wide engaging portion 11 for easily engaging a finger is provided on the outside of the operation tool 12 for detaching the movable die 3. Since it is formed, it is possible to press the locking portion 11 securely and slide the operation tool 12 in the Y direction in the figure even with thick rubber safety gloves. As a result, the movable die 3 can be removed. Will be easier.

[0013]

[Embodiment 1] An embodiment of a movable die attaching / detaching structure for a compression head according to the present invention will be described in detail with reference to FIGS. The compression head is composed of a substantially C-shaped clamp die head 1 and a hydraulic cylinder 4 provided at the base (lower part) of the clamp die head 1. An insulating hose is connected to the lower part of the hydraulic cylinder 4. The connector 30 is provided so as to project. An insulating hose cover 31 is covered around the hydraulic cylinder 4 of the clamp die head 1, and an insulating resin is also coated around the clamp die head 1 (not shown).

A fixed die 2 and a movable die 3 each having a substantially U-shape are attached to the upper and lower portions of the clamp die head 1 so as to face each other. In the upper part of the clamp die head 1, there are formed an insertion hole 21 into which the rod-shaped connecting pin 20 projecting from the fixed die 2 is inserted, and a hole 41 so as to be orthogonal to the insertion hole 21. . The insertion / removal pin 22 having a button type knob 40 is inserted into the hole 41, and the tip of the insertion / removal pin 22 is projected into the insertion hole 21 by the force of a spring (not shown). There is.

When the connecting pin 20 of the fixed die 2 is inserted into the insertion hole 21, the insertion / extraction pin 22 is fitted in the locking recess 23 formed in the ring shape on the outer periphery of the connecting pin 20, and the fixed die is inserted. 2 is fixed to the clamp die head 1. When the insertion / extraction pin 22 is pulled in the X direction in FIG. 1, the tip of the insertion / extraction pin 22 comes out of the locking recess 23, whereby the fixed die 2 comes out of the clamp die head 1.

An insertion hole 9 for inserting a rod-shaped connecting pin 8 projecting from the movable die 3 is formed in the tip portion 7 of the piston rod 5 of the hydraulic cylinder 4 of the clamp die head 1. A doughnut-shaped operation tool 12 having an elliptical inner circumference larger than the outer circumference is attached to the outer circumference of the tip portion 7, and the operation tool 12 is provided between the operation tool 12 and the tip portion 7. The arranged elastic body (spring) 14 is pushed out in the direction of the arrow in FIG. Then, the insertion / extraction pin 13 projecting inside the operation tool 12 penetrates through the locking hole 10 formed in the tip end portion 7 of the piston rod 5, and is inserted in the insertion hole 9 in the arrow direction in FIG. 2 (a). It is designed to project inward.

Then, as shown in FIG. 3 (a), when the connecting pin 8 of the movable die 3 is inserted into the insertion hole 9 in the X direction in the figure, the connecting pin 8 is formed in a ring shape on the outer periphery thereof. The insertion / extraction pin 13 is fitted into the locking recess 15 so that the movable die 3 is fixed to the piston rod 5. Further, as shown in FIG. 3B, when the operating tool 12 is pulled in the Y direction in the figure, the inserting / extracting pin 13 is pulled out from the engaging recess 15 of the connecting pin 8, and the movable die 3 is moved to the piston rod. It can be removed from 5.

[0018]

[Effect of device]

 According to the movable die attaching / detaching structure of the compression head of the present invention, it is possible to easily remove the movable die 3 even while wearing thick work gloves, thereby improving work efficiency.

[Brief description of drawings]

1A is a side view showing an embodiment of a movable die attaching / detaching structure of a compression head of the present invention, and FIG. 1B is a front view of FIG. 1A.

2A and 2B are cross-sectional views taken along the line AA of FIG. 1A, and FIG. 2A shows a state in which an insertion / extraction pin of an operating tool is projecting into an insertion hole. (B) shows the state when the insertion / extraction pin is pulled out from the insertion hole by pulling the operating tool.

3A is a perspective view showing a mounted state of the movable die, and FIG. 3B is a perspective view showing a detached state of the movable die.

4A is a perspective view showing an example of attaching a metal sleeve to an electric wire, and FIG. 4B is a schematic view showing a conventional example of a compression head used for compressing the metal sleeve shown in FIG. 4A.

5A to 5F are perspective views showing various examples of a branch sleeve.

FIG. 6 is a perspective view showing an example of a linear sleeve.

FIG. 7 is a perspective view showing an example of a device sleeve.

8A and 8B are perspective views showing a structure for attaching and detaching a fixed die in the compression head of FIG. 4B,
(A) shows a fixed die attached state, and (b) shows a fixed die detached state.

9 (a) and 9 (b) are perspective views showing a detachable structure of a movable die in the compression head of FIG. 4 (b),
(A) shows the attached state of the movable die, and (b) shows the detached state of the movable die.

[Explanation of symbols]

 1 Clamp Die Head 2 Fixed Die 3 Movable Die 4 Hydraulic Cylinder 5 Piston Rod 6 Metal Sleeve 7 Tip 8 Link Pin 9 Insertion Hole 10 Locking Hole 11 Locking Part 12 Operation Tool 13 Insertion / Extraction Pin 14 Elastic Body

Claims (1)

[Scope of utility model registration request] 1. A fixed die 2 and a movable die 3 are attached to a clamp die head 1 so as to face each other. In a compression head in which a metal sleeve 6 arranged between the dies 2 and 3 is compressed, an insertion hole 9 for inserting a connecting pin 8 projecting from the movable die 3 into a tip end portion 7 of the piston rod 5, Locking hole 1 penetrating outward from the insertion hole 9
An operating tool 12 which is formed with 0 and is provided with a wide locking portion 11 on the outer periphery of the distal end portion 7 that has a donut shape and can lock a finger outward.
Is provided slidably, and an insertion / extraction pin 13 that protrudes inward and penetrates the locking hole 10 and locks the connecting pin 8 is attached to the operation tool 12, and the operation tool 12 is provided between the operation tool 12 and the tip portion 7. , The operation tool 12 has the insertion / removal pin 13 with the locking hole 1
A movable die attachment / detachment structure for a compression head, characterized in that an elastic body (14) for pushing in the direction of being pulled in is provided.