JPH0338958Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pressure welding cutting tool used for terminal processing of electric wires, and more particularly to a wire pressure welding cutting tool having a hammer body built into a tool grip.

[Conventional technology]

Conventionally, as this type of pressure welding cutting tool, a tool as shown in FIG. 8 has been known. That is, it has a structure in which a tool body 25, which has a punch 23 for pressure welding and a cutter 24 for cutting integrally fixed to the tip thereof, is inserted and fixed into a grip body 26.

[Problem that the invention attempts to solve]

Normally, terminal processing work for connecting electric wires to terminal blocks is generally performed using the conventional tools described above. However, when performing terminal processing work using the above tool, it is necessary to hold the grip and press the entire tool until pressure welding and cutting, which is inefficient and has poor workability when performing many tasks at once. , which also required a lot of effort. Furthermore, depending on the location where the terminal block is installed, there are cases where the terminal block cannot be pressed with sufficient force, and there is a risk that connection errors may occur due to insufficient pressing force.

[Means for solving problems]

The present invention was created with the aim of solving the above-mentioned problems and providing a pressure welding cutting tool that has excellent workability and efficiency and can reduce labor. A hammer body biased forward by an elastic member is movably housed, and the tip end of the hammer body in the biasing direction has the other side end of a tool body with one side protruding from the tip end of the gripping body. The tool body is urged in the direction of the hammer body by an elastic member fitted into the shaft of the tool body and is movable by a predetermined stroke by a guide groove formed in the grip body. , a trigger is slidably provided below the gripping body, and the trigger is provided with a locking piece that engages with a locking groove formed in the hammer body, and
The electric wire pressure welding and cutting tool is characterized in that the gripping body facing the locking piece is provided with a release means for releasing the engagement with the hammer body when the locking piece comes into contact with the holding piece.

[Effect]

According to the pressure welding cutting tool having the above configuration, when the tool body is lightly placed on the electric wire on the terminal block and the trigger is operated, the tool comes into contact with the hammer body due to the impact force of the hammer body built in the grip body. The body is struck and pressed for a predetermined stroke to perform the desired pressing and cutting operation.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a vertical sectional view of the main parts of the entire pressure welding cutting tool of the present invention. In the figure, the grip body 1 is formed by left and right housings that can be vertically divided into two parts from the center, and the right end in the figure is integrated with a handle part 1A having a large area to facilitate gripping operation. It is formed. From the approximate center of the gripping body 1 to the rear (right side) is a storage chamber 2 for a hammer body, which will be described later.
Further, near the front (left side), a guide groove 3 in which one side of a tool body to be described later is accommodated is formed in communication with the hammer body storage chamber 2. Hammer body storage chamber 2
A cylindrical hammer body 4 whose left side has a narrow diameter over a predetermined length is housed in the chamber so as to be movable from side to side, and the hammer body 4 is inserted into the right side of the hammer body storage chamber 2. It is biased leftward (forward) by a spring 5 with a relatively strong force. and hammer body 4
The large-diameter end portion contacts the stopper 6, and the small-diameter portion 4A passes through the communication hole 7 and projects into the guide groove 3. Further, a slider 8 is integrally fixed to the lower part of the hammer body 4, and a locking groove on the front side of the slider 8 engages with a locking piece provided on a trigger to be described later. 8A is formed.

On the other hand, a tool body 9 is provided protruding from the left end of the gripping body 1, and this tool body 9 has a punch 10 for press-welding the electric wire at the front end, and a cutter 11 for cutting the wire.
It is a rod-shaped pressing rod having a right side end portion formed with a flange portion 9A having a large diameter, and is housed in a guide groove 3 formed in the grip body 1. The tool body 9 is urged toward the right hammer body 4 by a return spring 12 having a low spring constant and inserted into a groove portion 3A of the guide groove 3 having a slightly smaller diameter. Therefore, when not in use, the narrow diameter portion 4A of the hammer body 4 and the tool body 9 protruding into the guide groove 3
is in contact with the flange 9A. Note that the stroke S within which the collar portion 9A of the tool body 9 can move within the guide groove 3 is set to the minimum stroke necessary for press-fitting and cutting the electric wire.

By the way, there is a trigger 1 below the grip body 1.
3 is slidably provided while being sandwiched between the left and right housings forming the grip body 1. This trigger 13 has a spring 15 inserted into a spring chamber 14 formed in the grip body 1 at the rear of the trigger 13.
is biased forward (to the left) by Further, the sliding portion 13A of the trigger 13 is partially housed in the spring chamber 14 while compressing the spring 15 during operation.

As shown in the partially broken part of the trigger 13,
A recess 16 is formed, and a locking piece 18 having a protrusion on the upper part is fitted into the recess 16 via a spring 17. The locking groove 8A is biased and locked. . As shown in FIGS. 3 and 4, the locking piece 18 is formed with cylindrical protrusions 18A, 18A protruding left and right, and the protrusions 18A, 18 are provided at the rear of the grip body 1 facing the protrusions 18A, 18A. an inclined cam surface 19 for releasing the engagement with the locking groove 8A by contacting the locking groove 8A;
is formed.

Next, the operation of the above embodiment will be explained.

When the trigger 13 is pulled rearward (to the right), the locking piece 18 fitted in the recess 16 of the trigger 13 also moves to the right, and the projection formed on the upper part of the locking piece 18 locks the slider 8. The hammer body 4 integrated with the slider 8 is pulled rearward while compressing the spring 5. This hammer body 4
With the movement of the tool body 9, which had been in contact with the narrow diameter portion 4 of the hammer body 4 within the guide groove 3,
Then, the flange 9A moves back together with the tool body 9 by a stroke S by the biasing force of the return spring 12, that is, until it comes into contact with the right end surface of the guide groove 3. (See Fig. 2) When the trigger 13 is still pulled to the right, the hammer body 4 strongly compresses the spring 5 and retreats further, and as shown in Fig. 3, the locking piece 18
When the position shown by the dotted chain line is reached, that is, the protrusions 18A, 18A of the locking piece 18 come into contact with the inclined cam surface 19 formed on the grip body 1, and the locking piece 18 pushes the spring 17 by the cam surface 19 and moves downward. When pressed, the protrusions 18A, 18A of the locking piece 18 are released from the locking groove 8A of the slider 8 that is integrated with the hammer body 4, and the hammer body 4 is moved by the elastic force of the spring 5 as shown by the two-dot chain line in the figure. The hammer body 4 instantly slides forward (to the left) from the position until the large diameter end of the hammer body 4 comes into contact with the stopper 6.

Further, as the gripping force is loosened, the trigger 13 returns to its original state due to the urging force of the spring 15, and at the same time, the locking piece 18 also slides on the lower surface of the slider 8 and returns to its original state, and is fitted into the locking groove 8A of the slider 8 again. I come to do it.

On the other hand, the impact force accompanying the sliding of the hammer body 4 is
It acts on the flange 9A of the tool body 9 located at the right end of the guide groove 3 and strikes this head, pushing the tool body 9 out by the stroke S formed in the guide groove 3. The pressure welding and cutting operation is performed by this pressing force.

Next, an example of work using the tool of the present invention will be explained with reference to FIGS. 5 to 7. As shown in FIG. 5, the electric wire 22 is first placed on the pressure fitting 21 of the terminal block 20, and then the electric wire 22 is lightly held by the punch 10 of the tool body 9. In this state, when the aforementioned trigger 13 is pulled to operate the hammer body 4, the impact force of the hammer body 4 acts on the entire tool body 9, whereby the tool body 9 is moved by the minimum stroke S necessary for the pressure cutting. The electric wire 22 is pressed into the punch 10 as shown in FIG.
Then, the cutter 11 performs pressing and cutting at the same time. After pressure contact, the sheath of the electric wire 22 is torn as shown in the cross-sectional view of FIG. 7, and the core wire 22A and the pressure contact fitting 21 come into contact with each other and are electrically connected.

As described above, pressing and cutting can be easily and reliably performed only by operating the trigger 13. It should be noted that the present invention is not limited to the above-mentioned pressure welding cutting tool, but can be applied to, for example, an automatic punch or the like by making modifications within the scope of the idea of the invention.

[Effect of idea]

As is clear from the above description, the pressure welding cutting tool of the present invention provides the following effects.

(1) Pressure cutting of electric wires is carried out by the impact force of the hammer body when the trigger is operated, so there is no need to apply force to the entire tool as in conventional methods, and therefore it can be done regardless of the location where the terminal block is installed. Since a uniform pressing force is always applied, reliable pressure cutting is possible.

(2) In addition to reducing labor, work efficiency and work efficiency are greatly improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of the main parts showing the whole pressure welding cutting tool according to the present invention, Fig. 2 is a longitudinal sectional front view of the same with the trigger slightly pulled, and Fig. 3 is the engagement of the locking piece and the hammer body. and an enlarged sectional view showing the released state, No. 4
The figure is a sectional view taken along the line X--X in FIG. 3, FIGS. 5 to 7 are explanatory diagrams showing examples of pressure welding and cutting of electric wires, and FIG. 8 is a conventional tool. 1... Gripping body, 3... Guide groove, 4... Hammer body, 5, 12, 15, 17... Spring, 8...
...Slider, 9...Tool body, 10...Punch, 1
1... Cutter, 13... Trigger, 18... Locking piece, 19... Inclined cam surface.

Claims (1)

[Scope of utility model registration request] A hammer body biased forward by an elastic member is movably stored in the grip body, and a tool body having one side protruding from the tip of the grip body is provided at the tip end of the hammer body in the biasing direction. With the side ends in contact with each other, the tool body is urged in the direction of the hammer body by an elastic member fitted into the shaft of the tool body, and is movable by a predetermined stroke by a guide groove formed in the grip body. On the other hand, a trigger is slidably provided below the gripping body, and the trigger is provided with a locking piece that engages with a locking groove formed in the hammer body, and a gripping piece facing the locking piece is provided on the trigger. An electric wire pressure welding and cutting tool, characterized in that the body is provided with a release means for releasing the engagement with the hammer body when a locking piece comes into contact with the body.