JPH07192839A - Press-fitting tool for coaxial cable and its press-fitting method - Google Patents

Abstract

PURPOSE:To prevent slipping-out of a cable from a connector, and enhance workability by forming press-fitting parts to fasten a coaxial cable in two dies, and arranging a guide to slidingly move the coaxial cable in the press fitting direction in one die. CONSTITUTION:When a pin 19 is moved downward by opening operation levers 17, a die 20 slidingly moves downward, and a die 6 is also situated downward. Thereby, a die 11 separates from a fixed die 10 by a spring 13, and a central conductor 24 of a coaxial cable 23 is put in a condition of being insertable in a press-fitting part 12. In this condition, the central conductor 24 is inserted from a central conductor inserting port 1b, and is arranged in the pressfitting part 12. Afterwards, when the levers 17 are closed, the die 20 moves upward, and moves the die 6 upward. Next, the die 6 comes into contact with the die 11, and pushes the die 11 upward against the spring 13, and the conductor 24 is press-fitted by press-fitting recessed parts 10a and 11a. Thereby, prescribed fastening force is obtained, and workability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimping tool for a coaxial cable and a crimping method for connecting a coaxial cable used in communication equipment and a connector.

[0002]

2. Description of the Related Art FIG. 2 is a front view of a conventional coaxial cable crimping tool. In the figure, reference numeral 31 indicates
A pair of dies are supported at a substantially central portion by a pin 33 so as to face each other so as to be swingable, and crimping portions 32 having a trapezoidal concave shape formed at a tip end thereof are opposed to each other and can be opened and closed. Three
Reference numeral 4 denotes a pair of handles, the tip side of which is pivotally supported by the pin 35 at the other end of the die, and which is supported by the pin 36 to be swingable so as to close the operation portion 37 on the rear end side. The crimp portion 32 is closed, the connector and the coaxial cable are clamped in a hexagonal cross section from two directions, and the connector is crimped to the coaxial cable.

[0003]

However, the above-mentioned conventional crimping tool for coaxial cables has a pair of dies 31.
Since it is a method of crimping from two directions, the tightening force acts only at two points, and therefore, there are drawbacks that the tightening torque is reduced, the holding force of the connector with respect to the cable is low, and the cable is easily pulled out. Also, since the dies are tightened from two directions, the meat of the aluminum pipe, which is the outer conductor, may stick out from between the tightening dies,
Therefore, there is a problem that the connector cannot be inserted into the connector shell. Further, because of the structure, the distance between the pin 33, which is the swinging fulcrum of the die 31, and the crimping portion 32, which is the point of action, and the distance between the pin 35, which is the force point, and the pin 33, are substantially the same. There is also a problem that the workability is poor because the required load on the handle 34 is large and the opening angle of the operating portion 37 must be large.

Therefore, the present invention has been made in view of the above-mentioned conventional drawbacks or problems, and an object of the present invention is to prevent the cable from coming off from the connector and to provide a load necessary for crimping while the tightening torque is strong. It is an object of the present invention to provide a crimping tool and a crimping method for a coaxial cable, in which the workability is improved by reducing the size and the amount of movement of the operating portion.

[0005]

In order to achieve this object, a coaxial cable crimping tool according to the present invention includes a pair of opposed first dies slidably guided in a frame and a frame. A pair of arms pivotally supported at one end, a pair of operation levers pivotally supported at the other end of the arms, one end side of which is swingably supported by a common shaft, and a frame supported by the common shaft of the operation lever. The second guide slidably inside
A die for forming a crimp portion for fastening the coaxial cable to the first and second dies, and a guide for sliding the coaxial cable in the crimping direction between the first die and the frame. Is provided.
In addition, the coaxial cable crimping tool according to the present invention is provided with a third die that the second die engages with and slides on, and a fixed die that is disposed so as to face the third die. Further, the method for crimping a coaxial cable according to the present invention is such that another pair of dies is slid by operating the lever to tighten the coaxial cable, and at the same time, the dies are slid in two directions substantially orthogonal to the sliding direction of the dies. The coaxial cable is tightened with a die.

[0006]

According to the present invention, the coaxial cable is fastened from three directions by three dies. Further, since the third die that the second die engages with and slides and the fixed die that is arranged so as to face the third die are provided, the crimping is performed at two locations.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a partially cutaway front view of a coaxial cable crimping tool according to the present invention, and FIG. 1B is a partially cutaway front view showing the same crimping operation. In these figures, reference numeral 1
Indicated by is a frame, which is provided with a hollow portion 3 in which an opening 2 is formed, and on both side walls of the hollow portion 3 facing each other,
A tapered guide 4 is formed. Also, the hollow part 3
A recess 5 is provided at the upper end of the. Reference numeral 6 denotes a pair of first dies facing each other, and a tapered surface 7 having the same inclination as that of the guide 4 and a crimp portion 8 formed at an opening angle of 120 ° are formed. It is slidably guided up and down along. A compression spring 6a is interposed between the pair of dies 6 and presses the first die 6 against the guide 4 of the frame 1.

Reference numeral 10 is a fixed die having a pressure-bonding concave portion 10a fixed to the upper end of the concave portion 5, and 11 is a fixed die 1.
No. 0, a third die which is guided slidably up and down in the concave portion 5 and has a pressure-bonding concave portion 11a and a flange portion 11b for retaining, and 12 is a fixed die 10 and a third die 1.
The second pressure-bonding portion 13 formed by the pressure-bonding recesses 10a and 11a facing each other is fitted between the fixed die 10 and the third die 11 to separate the third die 11 from the fixed die 10. It is a spring that urges in the direction of. The front and back of the frame 1 at the portion corresponding to the second crimping portion 12,
A long hole-shaped center conductor insertion hole 1b indicated by a chain double-dashed line in the drawing, into which a center conductor 24 of a coaxial cable 23 described later is inserted, penetrates.

Reference numeral 15 denotes a pair of opposing arms, one end of which is pivotally supported by a pin 16 on both sides of the lower end of the frame 1, and the other end of which is pivotally supported by a pin 18 to each of a pair of operating levers 17. The operation levers 17 are connected to each other at their upper ends by a pin 19, which is a common rotation shaft, so as to be swingable about the pin 19. 20
Is a second die connected to the pin 19 and is slidably guided up and down along the opening 2. A crimp portion 21 having an opening angle of 120 ° is formed on the upper end surface.

The pressure-bonding portion 21 and the pair of pressure-bonding portions 8 form a first pressure-bonding portion 22. A slotted coaxial cable insertion hole 1a indicated by a chain double-dashed line in the drawing, into which the coaxial cable 23 is inserted, penetrates through the front and back of the frame 1 at a portion corresponding to the first crimping portion 22. Reference numeral 23 denotes a coaxial cable, which is concentrically formed from the center to a center conductor 24, an insulator 23, and an aluminum pipe as an outer conductor. Two
A connector 7 is crimped onto the coaxial cable 23.

Next, a crimping operation for crimping the connector to the coaxial cable by the coaxial cable tool having such a configuration will be described. First, as shown in FIG. 1A, the operation levers 17 are opened so as to separate from each other around the pin 19, and the pin 19 is moved downward. As a result, the second die 20 slides downward, and a gap into which the coaxial cable 23 can be inserted is formed in the first crimp portion 22. In this state, the coaxial cable 23 is inserted through the coaxial cable insertion hole 1a of the frame 1 and placed on the first crimping portion 22.

Thereafter, as shown in FIG. 2B, when the operating levers 17 are pivotally moved about the pins 19 so as to be close to each other, the pins 19 move upward and the second die 20 also moves upward. Move to. When the second die 20 moves upward, the first die 6 also starts moving upward via the coaxial cable 23, and when the second die 20 moves upward, the taper surface 7 is attached to the guide 4 by the guide 4. The dies 6 slide on each other by the guide 4, and slide in a direction in which the dies 6 approach each other against the biasing force of the compression spring 6a, that is, in the horizontal direction orthogonal to the sliding direction of the second die 20. First crimping portion 22
Is formed into a hexagonal shape by the second die 20 that slides upward and the pair of first dies 6 that are adjacent to each other in the horizontal direction and the crimping portions 8 and 21.

Therefore, the connector 27 is plastically deformed into a hexagonal cross section by the first crimping portion 22 and crimped to the coaxial cable 23. Thus, the coaxial cable 2
Since 3 is crimped from the three directions by the pair of first die 6 and second die 20, the tightening torque is sufficiently generated, the connector 27 is not loosened, and the coaxial cable 23 does not come off. To be prevented. Further, the crimping in three directions can prevent the meat of the aluminum pipe 26 from protruding from the connector 27.

Further, the pin 1 serving as a fulcrum of the operating lever 17
Since the distance between 6 and the pin 18 which is the force point is larger than the distance to the pin 19 which is the point of action, an extra load is applied to the second die 20 than the load applied to the operation lever 17 by the lever principle. Therefore, the tightening force of the second die 20 is increased. Furthermore, since the first die 6 is slid in the horizontal direction by the slanted guide 4, the taper surface 7 also increases the tightening force of the first die 6. Since the tightening force by both dies 6 and 20 is increased in this way, a sufficient tightening force can be obtained even if the moving amount of both dies 6 and 20 is small, and as a result, the opening amount of the operating lever 17 can be reduced. For,
Workability is improved.

Next, the crimping operation of the center conductor will be described. First, as shown in FIG. 1A, the operation levers 17 are opened so as to separate from each other around the pin 19, and the pin 19 is moved downward. As a result, the second die 20
Slides downward, the upper end surface of the second die 20 and the lower end surface of the first die 6 are disengaged, and the first die 6 is also located downward. Therefore, the third
The die 11 of the fixed die 10 by the spring 13.
And the central conductor 24 of the coaxial cable 23 can be inserted into the second crimping portion 12.

In this state, the center conductor 24 is inserted from the center conductor insertion hole 1b of the frame 1 and placed in the second crimp portion 12. After that, when the operation levers 17 are brought close to each other and rotated about the pin 19, the pin 19 moves upward, and accordingly, the second die 20 moves.
Also moves upwards. When the second die 20 moves to some extent, the second die 20 comes into contact with the first die 6,
The first die 6 also moves upward. When the first die 6 moves to some extent, the first die 6 moves to the third die 11
And presses the third die 11 upward against the spring 13 so that the pressure-bonding recess 11a approaches the pressure-bonding recess 10a, and the center conductor 24 is tightened and pressure-bonded by the pressure-bonding recesses 10a and 11a. .

Thus, with one tool, two crimp parts 1
2 and 22, the connector 27 and the coaxial cable 23 and the central conductor 24 of the coaxial cable 23 can be used for both crimping.

[0018]

As described above, according to the present invention, a pair of opposed first dies slidably guided in a frame, a pair of arms pivotally supported at one end by the frame, A pair of operation levers pivotally supported at the other end of the arm and one end side of which is swingably supported by a common shaft, and a second slide lever which is slidably guided in a frame supported by the common shaft of the operation levers. A die, and a crimping portion for fastening the coaxial cable is formed on the first and second dies, and a guide for sliding the coaxial cable in the crimping direction is provided between the first die and the frame. Since the coaxial cable is tightened from three directions by operating the operation lever with three dies, it is possible to prevent the tightening torque from decreasing and to prevent the coaxial cable from being disconnected from the connector. Protrusion of the meat of the conductor can be prevented. Further, the first die can obtain a large tightening force by the lever principle of the operation lever and the arm, and the second die can obtain a large tightening force by the action of the tapered portion by the guide. A predetermined tightening force can be obtained without increasing the amount of movement, which improves the workability of crimping work.

Further, according to the present invention, a third die, with which the second die engages and slides, and a fixed die, which is disposed so as to face the third die, are provided. Since the center conductor of the cable can also be used for crimping,
Two tools can be crimped with one tool, eliminating the need to replace or search for tools, improving workability and reducing the number of tools in half.
Tool management work is reduced.

[Brief description of drawings]

FIG. 1A is a partially cutaway front view of a coaxial cable crimping tool according to the present invention, and FIG. 1B is a diagram showing a crimping operation.

FIG. 2 is a front view of a conventional coaxial cable crimping tool.

[Explanation of symbols]

 1 frame 1a coaxial cable insertion hole 1b center conductor insertion hole 3 hollow part 4 guide 5 recessed part 6 first die 7 taper surface 8 crimping part 10 fixed die 11 third die 12 second crimping part 15 arm 17 operation lever 20 Second die 21 Crimp portion 22 First crimp portion 23 Coaxial cable 24 Center conductor 26 Outer conductor 27 Connector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sueo Sugano 1-3-5 Higashi Ikuta, Tama-ku, Kawasaki City, Kanagawa Prefecture Kawashima Manufacturing Co., Ltd.

Claims (3)

[Claims] 1. A pair of opposing first dies slidably guided in a frame, a pair of arms whose one end is pivotally supported by the frame, and one end of which is pivotally supported by the other end of the arms. It comprises a pair of operating levers that are swingably supported by a common shaft, and a second die that is slidably guided in a frame that is supported by the common shaft of the operating levers. The die is provided with a crimp portion for fastening the coaxial cable, and a guide for sliding the coaxial cable in the crimping direction is provided between the first die and the frame. Crimping tool. 2. The coaxial cable crimping tool according to claim 1, wherein a third die in which the second die engages and slides, and a fixed die arranged to face the third die. A crimping tool for coaxial cables characterized by being provided. 3. The lever is operated to slide the die to tighten the coaxial cable, and at the same time, the coaxial cable is tightened using another pair of dies that slide from two directions substantially orthogonal to the sliding direction of the die. How to crimp a coaxial cable.