JPH09322353A - Cable intertwisting method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatize the intertwisting work for intertwisting the fellow cables by inserting a plurality of cables into the cable insertion holes of a die having cable insertion holes, and restricting them so that they may be impossible of relative rotation to this die, and rotating this die around the cable insertion holes, in this condition. SOLUTION: At a body case 12 and a cover 14, shafts 17 equivalent to a shaft 16 are provided in the positions 120 deg. separate each in circumferential direction from the shaft 16, and these three shafts 16 are provided with severally rotatable die holding rollers 18. Then, a die 20 is retained in the position inscribed with all die holding rollers 18 in condition that the cover 14 is closed. This die 20 is provided with a cable insertion hole 21 at the center, and the cable insertion hole 21 restricts two cables D arranged side by side in parallel, and restricts both cables D incapably of relative rotation in this insertion state. The die 20 is rotated around the cable insertion hole 21 as it is in this restriction state. Hereby, the intertwisting work can be automated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire twisting method and apparatus for twisting a plurality of electric wires laid in appropriate places.

[0002]

2. Description of the Related Art When a plurality of electric wires are laid in parallel, the electric wires are twisted with each other for the purpose of reducing the slack of these electric wires or constructing a cable having a shielding function. Work may be done. Conventionally, such twisting of electric wires has been performed by manually twisting the electric wires while gripping all the electric wires with a finger or the like, that is, by hand.

[0003]

In the above manual work, the fingertips are easily tired, and continuous work for a long time cannot be expected. In particular, when the number of electric wires is large or when each electric wire has a large diameter, the force required for twisting becomes extremely large, which not only increases the burden on the worker but also makes the work itself impossible. Occurs.

Further, in the above-mentioned manual work, the twist pitch is likely to be nonuniform, which may impair the appearance of the cable or cause electrical interference with other electric wires. is there.

In view of such circumstances, it is an object of the present invention to provide an electric wire twisting method and apparatus capable of automatically and stably performing a twisting operation for twisting wires. .

[0006]

As a means for solving the above problems, the present invention is an electric wire twisting method for twisting a plurality of electric wires collectively in a bundled state, A die having an electric wire insertion hole is inserted into the electric wire insertion hole and constrained so that it cannot rotate relative to the die. In this state, the die is rotationally driven around the electric wire insertion hole.

According to this structure, all the wires can be automatically twisted only by rotating the die in which all the wires are inserted into the wire insertion holes, and a stable twist pitch can be obtained. it can.

Further, the present invention is an electric wire twisting device for carrying out the above method, wherein all the electric wires can be inserted all at once, and in the inserted state, all the electric wires are constrained to be relatively non-rotatable. A die having an insertion hole, and a die holding means for rotatably holding the die around the electric wire insertion hole;
And a die driving means for rotationally driving the die.

The die holding means may be constituted by, for example, a bearing fixed to the outer peripheral surface of the die. The die holding means holds the die in a rotatable state and releases the die. If it is configured to be switchable to the open state, the wire holding work can be easily carried out by switching the die holding means to the open state and taking out the die from the die holding means.

More specifically, the total number of the main body case, the cover which is openably and closably attached to the main body case, and the total number of which are attached to both the main body case and the cover so as to be rotatable about an axis parallel to the rotation axis of the die are as follows. According to the present invention, which has three or more die holding rollers and arranges these die holding rollers so that all the die holding rollers come into contact with the outer peripheral surface of the dice with the cover closed, the cover is opened. The dies can be taken out and set in this state, and after this setting, the cover can be closed to hold all the dies holding rollers stably. Further, the space between the die holding rollers can be used to connect the die and the die driving means with a simple layout.

The die may be integrally formed as a whole, but in this case, since the electric wire can be inserted only into the electric wire insertion hole from the axial direction, the electric wire can be inserted in the middle portion of the electric wire already laid. If you want to set the dice,
It is necessary to perform a troublesome work such as cutting the electric wire once and inserting the electric wire into the electric wire insertion hole of the die, and then connecting the cut ends again. On the other hand, the die is divided in the circumferential direction, and the wire can be inserted into the wire insertion hole from the radial direction when the die is disassembled, and the assembled state is maintained when the die is assembled. If the assembling state holding means is provided, the die can be disassembled to insert it in the wire insertion hole from the radial direction without cutting it even in the middle of the wire, and then the die is assembled and the assembled state is maintained. By holding it, the die can be set in the middle of the wire.

As the die driving means, a die gear provided on the outer peripheral portion of the die, a power transmission gear meshed with the die gear, and a gear driving means for driving the power transmission gear are preferable. Is. Especially,
A worm wheel is used as the die gear, and a worm that meshes with the worm wheel is provided on a rotary shaft extending in a direction orthogonal to the rotation center axis direction of the die, and the rotary shaft is rotationally driven at a position apart from the die on the rotary shaft. If the gear driving means is connected, the gear driving means can be easily arranged at a position outside the wire laying area, that is, at a position where it does not interfere with the electric wire. Further, even if a reduction mechanism is not provided, sufficient reduction can be achieved by combining the worm wheel and the worm, and the die can be rotationally driven at a low rotation speed suitable for twisting the wire.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a preferred embodiment of the present invention will be described with reference to the drawings.

The wire twisting device 10 shown here is provided with a main body case 12 extending in one direction and opening upward, and the front portion of the main body case 12 (the end portion shown in FIGS. 3 and 4; FIG. 2).
The cover 14 is attached to the left side). The cover 14 has a substantially semicircular side surface shape that opens downward, and its rear end (right end in FIG. 2) has a horizontal shaft 16 that penetrates the body case 12 in the width direction. It is connected to the front part of the main body case 12 via the. This allows
The cover 14 is rotatable (that is, openable / closable) between a closed position shown by a solid line in FIG. 2 and an open position shown by a two-dot chain line in FIG.

Hooks 1 are provided at the front ends of both side walls of the cover 14.
4a is formed, while lock pins 15 projecting laterally are provided on both side walls of the front end portion of the main body case 12.
The cover 14 is held at the closed position by the engagement of the lock pin 15 and the hook 14a.

In FIG. 1A and the like, reference numeral 19 is a stopper for determining the open position of the cover 14.

A shaft 17 equivalent to the shaft 16 is provided in the body case 12 and the cover 14 at positions spaced 120 ° from the shaft 16 in the circumferential direction, and the three dies 16 and 17 are rotatably dies. Holding roller 1
8 are provided. Then, with the cover 14 closed, the dice 20 are placed at a position inscribed with all the die holding rollers 18.
Is held.

Incidentally, regardless of the specific number of the die holding rollers 18, if the number is 3 or more, stable die holding is possible. However, if the rotation center shaft 16 of the cover 14 is used as the rotation center shaft of one of the die holding rollers 18, the number of parts can be reduced, and the positioning of the die holding roller 18 is easier. There is an advantage.

The die 20 has a cylindrical shape having an electric wire insertion hole 21 in the center thereof. The wire insertion hole 21 is 2
The electric wires D can be inserted in a state where they are arranged side by side in parallel, and in the inserted state, the electric wires D are constrained to be relatively non-rotatable, specifically, a substantially oval shape. Of the outer peripheral surface of the die 20, both widthwise ends thereof are cylindrical surfaces 23, and the worm wheel 22 is formed between the cylindrical surfaces 23. On one side surface of the die 20, a short columnar ring mounting portion 24 is provided so as to project laterally, and a flange portion 26 having a larger diameter than that is formed at an end portion of the ring mounting portion 24.

This die 20 is characterized by a first
Is divided in the circumferential direction into a die piece 20A and a second die piece 20B.
It is possible to disassemble and combine (assemble) B. First
The die piece 20A occupies a region having a central angle of approximately 270 ° around the wire insertion hole 21, and the second die piece 20B occupies the remaining region, that is, a region having a central angle of approximately 90 °.

In the present invention, both die pieces 20A,
The distribution of the size of 20B is not particularly limited, and may be appropriately set within a range in which the electric wire can be inserted into the electric wire insertion hole 21 from the outside in the radial direction in a state where both the die pieces 20A and 20B are disassembled as described later.

A die lock ring (assembly state holding means) 28 can be mounted around the ring mounting portion 24 formed by combining the two die pieces 20A and 20B. Both ends of the die lock ring 28 in the circumferential direction are separated from each other and elastically deformable in the radial direction, and the inner diameter in a non-deformed state is set to be slightly smaller than the outer diameter of the ring mounting portion 24. For this die lock ring 28, a retaining ring or the like conventionally used can be applied as it is. At both ends of the die lock ring 28 in the circumferential direction, operation knobs 29 for expanding the diameter of the die lock ring 28 are laterally projected.

As shown in FIG. 2, a rotary shaft 30 extending in the front-rear direction along the main body case 12 is rotatably accommodated in the main body case 12. A worm 32 is formed on the front end of the rotary shaft 30, and the worm 32 is arranged at a position where it can mesh with the worm wheel 22 of the die 20 held by the die holding roller 18. A gear 34 is fixed to the rear end of the rotary shaft 30, while a gear drive motor (gear drive means) is provided at the rear of the body case 12.
36 is stored, and the output shaft 37 of this gear drive motor 36
A gear 38 fixed to the above is meshed with the gear 34. Therefore, due to the operation of the gear driving motor 36, the driving force thereof is passed through the gear 38, the gear 34, the rotary shaft 30, the worm 32, and the worm wheel 22 in order, and the die 2 is driven.
0, so that the die 20 is driven to rotate around the electric wire insertion hole 21.

Further, semicircular cutouts 12b, 14b for securing a transport passage for the electric wire D are formed at the upper ends of the front sides of both side walls of the main body case 12 and the lower ends of both side walls of the cover 14, respectively.

Next, an electric wire twisting method using this device will be described.

At the initial stage, the cover 14 is opened, the die 20 is taken out from the main body case 12, and the die 20 is disassembled into the first die piece 20A and the second die piece 20B.

For the two electric wires D arranged in parallel with each other, the dice 20 is set in the middle thereof. Specifically, the middle part of the both electric wires D is connected to the first die piece 20.
Insert it from the side into the wire insertion hole 21 on the A side,
Then, the first die piece 20A and the second die piece 2
0B and the electric wire D is restrained in the electric wire insertion hole 21 and the die lock ring 2 is attached to the outside of the ring mounting portion 24.
8 is attached. By mounting the die lock ring 28, the state in which both the die pieces 20A and 20B are united around the both electric wires D (that is, the state where the dice 20 is assembled) is held.

The die 20 is set at a predetermined position in the body case 12. For details, take the main body case 12 to the place where the die 20 is placed, and
2, both cylindrical surfaces 23 on the outer peripheral portion of the die 20 come into contact with the two die holding rollers 18 on the body case 12 side,
In addition, the die 20 is set at a position where the worm wheel 22 meshes with the worm 32. After setting, cover 14
Is closed, and the hook 14a is engaged with the lock pin 15 on the main body case 12 side. As a result, the cover 14 is held in the closed position, and the die holding roller 18 on the side of the cover 14 is also held on the body case 12 side.
Similarly, the outer peripheral cylindrical surface 23 of the die 20 is contacted, and the die holding roller 18 holds the die 20 rotatably around the wire insertion hole 21.

With the rotation of both ends of both electric wires D being restricted, the gear drive motor 36 is operated to rotationally drive the die 20, and the both electric wires D are twisted together. As a result, both electric wires D are automatically twisted together as shown in FIG. 7, and it becomes possible to reduce the slack and to construct a cable having a shield function.

According to the method and apparatus as described above, unlike the conventional manual work, the electric wires D can be continuously and efficiently twisted together, and a stable twist pitch can be obtained. it can.

In addition to the above, the present invention can take the following forms.

(1) In the present invention, the number of electric wires twisted at one time is not particularly limited, and the dice 20 can be used in accordance with the number.
The shape of the wire insertion hole 21 may be set. For example, in order to twist three electric wires having the same diameter, the electric wire insertion hole 21
May be set to a substantially triangular shape, and the four wire wires may be twisted by setting the wire insertion hole 21 to a substantially square shape.

(2) The die 20 can be twisted even if it is integrally formed as a whole. In this case, the wire D may be inserted into the wire insertion hole 21 of the die 20 from the axial direction. . However, in this case, when it is desired to insert the electric wire D into the electric wire insertion hole 21 from the middle portion thereof, the electric wire D is once cut and inserted into the electric wire insertion hole 21, and then the connection ends are reconnected. While there is an inconvenience to be made, in the case of the split type die 20 as shown in FIGS. 5 and 6, by disassembling the die 20,
Even in the middle of the electric wire D, the electric wire D can be inserted into the electric wire insertion hole 21 from the side without being cut, and the advantage that the die 20 easily comes into contact with the knot can be obtained.

(3) In the present invention, the electric wire can be twisted even if the die is rotatably held in the case via a bearing, for example. However, in this case, it is very difficult to take out the die from the case, and the wire must be inserted in a narrow space inside the case while the die is set in the case, as shown in FIG. The die holding roller 18 is attached to both the main body case 12 and the openable / closable cover 14, and the die 20 is held from the outside in the radial direction by these die holding rollers 18, so that the die 14 can be opened with the cover 14 open. 20 is easily taken out, and there is an advantage that the electric wire setting work to the die 20 can be easily performed outside the case. There is also an advantage that the die 20 and its driving means (the worm 32 in the example of FIG. 1) can be connected with a simple layout by utilizing the space between the die holding rollers 18.

(4) In the present invention, the means for rotationally driving the die 20 is not particularly limited, and for example, a combination of spur gears, a combination of helical gears, a winding transmission mechanism or the like may be used. However, the worm wheel 2 as described above
2 and the worm 32 are used, the worm 32
Axis 30 extending in a direction orthogonal to the transport direction of the electric wire D
If the gear driving means such as a motor is connected to the rotary shaft 30 at this position, the gear driving means can be provided at a position outside the transport area of the electric wire D, and the layout is easy and There is an advantage that the die 20 can be driven to rotate at a low speed at a desired rotation speed without providing a reduction mechanism.

[0036]

As described above, according to the present invention, a plurality of electric wires are bundled and inserted into the electric wire insertion hole of a die having an electric wire insertion hole so that the electric wire cannot be rotated relative to the die. In this state, the die is rotated around the wire insertion hole, and the die, a die holding means for holding the die rotatably around the wire insertion hole, and the die are rotated. Since the device is equipped with a driving die driving means, the electric wires can be twisted automatically and continuously efficiently, and a stable twist pitch can be obtained.

According to the above apparatus, the die holding means can be switched between a holding state in which the die is rotatably held and a release state in which the die is released. By switching and taking out the dice from the die holding means, the effect of easily inserting the electric wire into the electric wire insertion hole can be obtained.

More specifically, the main body case, the cover which is openably and closably attached to the main body case, and the total number of which are attached to both the main body case and the cover so as to be rotatable around an axis parallel to the rotation axis of the die. According to the present invention, which comprises three or more die holding rollers and arranges these die holding rollers so that all the die holding rollers come into contact with the outer peripheral surface of the dice with the cover closed, It is possible to easily switch between the holding state and the releasing state by only the operation, and in the holding state, the dies can be stably held by three or more die holding rollers.
There is also an advantage that the dies and the die driving means can be connected with a simple layout by utilizing the space between the die holding rollers.

The die is divided in the circumferential direction, and an electric wire can be inserted into the wire insertion hole from the radial direction in the disassembled state of the die, and the assembled state is maintained in the assembled state of the die. According to the one provided with the assembling state holding means, it is possible to easily set the dies around the electric wires without cutting the electric wires even in the middle thereof.

According to the above-mentioned die driving means, a die gear provided on an outer peripheral portion of the die, a power transmission gear meshed with the die gear, and a gear driving means for driving the power transmission gear are provided. Dies can be driven and rotated with a simple structure.

In particular, the die gear is used as a worm wheel, and a worm that meshes with the worm wheel is provided on a rotary shaft extending in a direction orthogonal to the direction of the rotation center axis of the die, and a portion of the rotary shaft separated from the die is provided. According to the structure in which the gear driving means for rotationally driving the rotary shaft is connected, the gear driving means can be easily arranged at a position where it does not interfere with the electric wire, and the combination of the worm wheel and the worm can be achieved without providing a reduction mechanism. With this, an effect that sufficient deceleration can be obtained is obtained.

[Brief description of drawings]

FIG. 1A is a sectional front view showing a main part of an electric wire twisting device according to the present invention, and FIG. 1B is a sectional view taken along line AA of FIG.

FIG. 2 is an overall front view of the electric wire twisting device.

FIG. 3 is a plan view showing a main part of the electric wire twisting device.

FIG. 4 is a side view showing a main part of the electric wire twisting device.

FIG. 5 is a perspective view of a die and a die lock ring provided in the wire twisting device.

FIG. 6 is a sectional front view of the die.

FIG. 7 is a perspective view showing a usage state of the electric wire twisting device.

[Explanation of symbols]

 10 Electric Wire Twisting Device 12 Body Case 14 Cover 18 Die Holding Roller 20 Die 20A First Die Piece 20B Second Die Piece 21 Electric Wire Insertion Hole 22 Worm Wheel 28 Die Lock Ring (Assembled State Holding Means) 30 Rotating Shaft 32 Worm 36 Gear Drive motor

Claims (7)

[Claims] 1. A wire twisting method for twisting a plurality of wires together in a bundle, wherein all the wires are inserted into the wire insertion holes of a die having wire insertion holes. The electric wire twisting method is characterized in that the electric wire is constrained so that it cannot rotate relative to the electric wire, and the die is rotated around the electric wire insertion hole in this state. 2. An electric wire twisting device for collectively twisting a plurality of electric wires in a bundled state, wherein all the electric wires can be inserted together and all the electric wires cannot be relatively rotated in this insertion state. A die having an electric wire insertion hole having a shape to be restrained, a die holding means for rotatably holding the die around the electric wire insertion hole, and a die driving means for rotationally driving the die. Electric wire twisting device. 3. The electric wire twisting device according to claim 2,
An electric wire twisting device, wherein the die holding means is configured to be switchable between a holding state in which the die is rotatably held and a release state in which the die is released. 4. The electric wire twisting device according to claim 3,
As the die holding means, a main body case, a cover which is openably and closably attached to the main body case, and a total of three pieces which are attached to both the main body case and the cover so as to be rotatable around an axis parallel to the rotation axis of the die. An electric wire twisting device comprising the above-mentioned die holding rollers, wherein the die holding rollers are arranged so that all the die holding rollers come into contact with the outer peripheral surface of the dice with the cover closed. 5. The wire twisting device according to any one of claims 2 to 4, wherein the die is circumferentially divided, and the wire is inserted into the wire insertion hole from the radial direction in a state where the die is disassembled. An electric wire twisting device, which is configured so as to be capable of being equipped with an assembled state holding means for holding the assembled state in a state where the die is assembled. 6. The wire twisting device according to any one of claims 2 to 5, wherein the die driving means includes a die gear provided on an outer peripheral portion of the die, and a power transmission gear meshed with the die gear. An electric wire twisting device comprising: a gear driving means for driving the power transmission gear. 7. The electric wire twisting device according to claim 6,
A worm wheel is used as the die gear, and a worm that meshes with the worm wheel is provided as a power transmission gear on a rotary shaft extending in a direction orthogonal to the direction of the rotation center axis of the die. An electric wire twisting device, characterized in that a gear driving means for rotationally driving a rotary shaft is connected.