JPH07288912A - Cable twister - Google Patents

Abstract

PURPOSE:To facilitate the setting and change of twisting condition, concerning a cable twister for removing the fray of a core at the time of pressure bonding of a terminal. CONSTITUTION:A pair of twisting bars 10 and 10' in opposition shift with each other in reverse direction while catching a cable W Twisting bar holders 11 and 11' for supporting the twisting bars 10 and 10' ascend and descend by a cam plate 27 reciprocating at a specified angle. The twisting bar holders 11 and 11' are held capable of sliding up and down by a pair of holding members 17 and 17', and the holding, members 17 and 17' are free of contact and separation in the direction orthogonal to the twisting bars 10 and 10' by an air chuck 19. Accordingly, the setting and change of the twisting conditions will do merely by changing the catching force of the cable W by the twisting bars 10 and 10' by, for example, air pressure, so the adjustment can be made easily and quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire twisting device for preliminarily twisting a core wire to eliminate fraying and facilitate crimping when crimping a terminal to an end of an electric wire.

[0002]

2. Description of the Related Art To twist an electric wire, a pair of twisting rods are arranged between a wire cutter and an insulator cutter, and the wire is peeled (insulation coating is removed) and at the same time the twisting rods are moved by a driving mechanism. The core wire is twisted by moving it in the opposite direction to rotate the coating.

FIG. 7 shows a conventional wire twisting device (Japanese Utility Model Laid-Open No. 1-146709). In this device, the base ends of a pair of twisted rods 50, 50 'are attached to mounting members 52, 52' with a spacer 51 arranged around them, and the mounting members 52, 52 'are a twisted rod driving mechanism. It is connected to 53. By replacing the spacer 51, the position of the electric wire W is adjusted in the axial direction (that is, the electric wire feeding direction and the opposite direction) and the direction orthogonal thereto. Further, of the pair of twisted rods 50 and 50 ', one twisted rod 50 has its electric wire clamped position adjusted by the micrometer 54 and the push rod 55, and the other twisted rod 50' has an adjustable biasing force. The means 56 (spring 57, push rod 55 ') is urged in the wire holding direction, and the urging force is confirmed by, for example, a pressing force indicating needle 58.

[0004]

In the conventional wire twisting device, the mounting members 52, 5 having the spacer 51 arranged for adjusting the positions of the twisting rods 50, 50 'with respect to the wires W and adjusting the holding position.
2 ', the micrometer 54, and the biasing means 56, that is, a total of four means. Therefore, since these adjusting means are related to each other and the adjusting mechanism is complicated, it takes time to adjust when the twisting condition is changed depending on the type of electric wire,
It required a high degree of experience and skill. The present invention has been made in view of the above problems, and provides an electric wire twisting device capable of easily and quickly setting and changing the twisting condition of an electric wire depending on the type of the electric wire without requiring special skill. This is an issue.

[0005]

In order to achieve the above object, an electric wire twisting device of the present invention, as set forth in claim 1, holds an electric wire between a pair of opposing twisting rods, and twists the pair of twisting wires. A wire twisting device for twisting electric wires by moving rods in opposite directions by a drive mechanism, wherein one end supports the pair of twisting rods, and the other end is provided with a long hole in a direction orthogonal to the twisting rods. A rod holder; a pair of holding members for holding the pair of twisted rod holders in a vertically slidable manner; and an electric wire chuck means for moving the pair of holding members so that they can be contacted and separated in a direction orthogonal to the twisted rod, The reverse driving means includes a rotary actuator that reciprocally rotates at a predetermined rotation angle, and a cam plate that rotates coaxially with the rotary actuator and that has a cam pin provided at a symmetrical position with respect to the rotation axis. Pair a pair of cam pins with a pair of twists Each is loosely fitted in the elongated hole of the rod holder, characterized by comprising. The electric wire chuck means is pneumatically operated as described in claim 2, and the force applied to the pair of twisted rods is pneumatically adjusted.

[0006]

In the apparatus of the present invention, the pair of twisted rods move up and down in opposite directions by the reciprocating rotation of the rotary actuator (cam plate), that is, a simple vertical movement. Then, the pair of twisted rods move freely in the direction orthogonal to the axial direction of the twisted rod holder via the holding member of the twisted rod holder constituting the electric wire chuck means to clamp and release the electric wire. Therefore, when changing or setting the twisting condition of the electric wire, it is sufficient to adjust only the electric wire chuck means and to control the clamping pressure of the electric wire by the pair of twisted rods, which allows easy and quick adjustment. it can. Further, by operating the electric wire chuck means, that is, clamping the electric wire by a pair of twisted rods by air pressure, the structure and equipment are simple unlike the hydraulic type, and the device can be downsized.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-mentioned structure and operation of the present invention will be described with reference to the drawings showing the embodiments. FIG. 1 is a front view of an electric wire twisting device of the present invention, and FIG. 2 is a right side view thereof. 1 and 2
As shown in FIG. 3, the electric wire twisting device is configured by combining a cutter unit A and an electric wire twisting unit B. Cutter unit A
Is, as shown in FIG. 6, a pair of left and right wire cutters 1,
1'and a pair of insulator cutters 2 for cutting the insulating coating
2 ', and both cutters 1, 1'and 2, 2'are provided as described above.
A pair of twisted rods 10 and 10 'are arranged between them. Three
Reference numerals 3'denotes support members for the wire cutters 1 and 1'and the insulation cutters 2 and 2 ', respectively. The structure of the cutter unit A is known (actual fairness 3-
No. 47385, etc.) and detailed description is omitted. Reference numeral 6 is a mount for setting the cutter unit A.

The wire twisting unit B comprises a pair of twisting rods 10 and 10 'facing each other, twisting rod holders 11 and 11', holding members 17 and 17 'thereof, an air chuck 19, a rotary actuator 24, a cam plate 27 and the like. The pair of twisted rods 10 and 10 'are configured so as to move up and down in opposite directions and can be contacted and separated from each other in the left and right directions. In addition, a pair of twisted rods 10, 1
Regarding the left and right symmetrical component members such as 0 ', mainly one of them will be described as a representative.

As shown in FIG. 6, the twisted rod 10 is preferably provided with an anti-slip serration 10a on its inner surface.
The twisted rod holder 11 that supports the twisted rod 10 has a cam engaging piece 12 that projects outward at the upper end and an L-shaped mounting piece 14 that projects inward at the lower end, and has a vertical guide in the center. The rail 15 is fixed by screws 16. A long hole 13 perpendicular to the axial direction of the twist bar holder 11 is formed in the cam engaging piece 12 at the upper end, and the twist bar 1 is provided in the mounting piece 14 at the lower end.
0 is likewise fixed by means of screws 16.

The twisted rod holder 11 is held by a holding member 17 so as to be vertically movable. That is, the linear motion bearing 18 is fixed to the lower end portion of the holding member 17, and by the engagement of the linear motion bearing 18 and the guide rail 15,
The twisted rod holder 11 is held so as to be vertically slidable. On the other hand, the pair of holding members 17, 17 ′ is fixed to the pair of leg pieces 20, 20 ′ of the air chuck 19. The air chuck 19 has a built-in link opening / closing mechanism that is actuated by air pressure. When the supply pressure changes, the leg pieces 20 and 20 'are moved in parallel so that the leg pieces 20 and 20' can be moved in and out of parallel with each other, and the clamping pressure of the wire by the twist rods 10 and 10 'can be reduced. Can be adjusted. The air chuck 19 may be a commercially available product having a known configuration, and a detailed description thereof will be omitted. However, the air chuck 19 is connected to a regulator (not shown), and the twisting condition is adjusted by changing the air pressure. It is designed so that it can be read accurately with a meter.

Reference numeral 21 is a mounting plate to which the air chuck 19 is fixed, 22 is a decorative plate on the front surface thereof, and the mounting plate 21 is formed so as to project from the fixing plate 23 of the rotary actuator 24 to the front surface. The rotary actuator 24 is configured so as to reciprocate left and right around a rotation shaft 25 thereof at a predetermined rotation angle, and the rotation shaft 25 is provided with a pair of cam pins 26, 26 'which are axially symmetrical with each other. 27 is fixed, and the pair of cam pins 26, 26 'are loosely fitted in the long holes 13, 13 of the twisted rod holders 11, 11', respectively. Therefore, when the rotary actuator 24, that is, the cam plate 27 is reciprocally rotated as shown by the arrow P, the twist bar 10,
10 'moves up and down in opposite directions.

Further, the fixed plate 23 of the rotary actuator 24 is provided with an upper plate 28 at the upper end on the back side thereof and fixed linear motion bearings 29 on both sides of the lower part. The linear motion bearing 29 is engaged with guide columns 32 standing upright on both front sides of the base block 31 in the wire twisting unit B, and between the stopper 33 fixed to the upper end of the guide column 32 and the base block 31. A cylinder barrel 35 and a piston mount 36, which form a pneumatic rodless cylinder 34, are provided. By the operation of the rodless cylinder 34, as shown in FIG. 3, the wire twisting unit B such as the twisting rods 10 and 10 ′, the air chuck 19, the rotary actuator 24 and the like are connected to the cutter unit A via the fixing plate 23 and the mounting plate 21.
Can be moved above. In addition, 37,3
Reference numeral 8 denotes a supply / discharge port of compressed air for the cylinder barrel 35. Further, 39 is a front and rear position lock lever of the wire twisting unit B with respect to the cutter unit A, and 40 is a front and rear position adjusting screw. Reference numeral 41 is a mount of the wire twisting unit B, and 42 is a fixing bolt thereof.

Next, the operation of the above wire twisting device will be described. 2 shows that the wire cutters 1 and 1'and the insulation cutters 2 and 2 '(see FIG. 6) are open respectively, and the end of the electric wire W is fed between the open twist bars 10 and 10'. Indicates.

FIG. 4 shows the twisting start state of the electric wire. That is,
Open wire cutters 1 and 1'and insulation cutters 2 and 2 '
Approach each other and cut the coating w ₂ on the end portion of the electric wire W by the insulator cutters 2 and 2 ′ as shown in FIG. 6. At the same time, the operation of the air chuck 19 causes the leg pieces 20, 2 to move.
0 ', holding members 17, 17', twist bar holders 11, 1
The pair of twisted rods 10 and 10 'are closed via 1'to hold the electric wire W therebetween. Thus, the air chuck 19 having the leg pieces 20, the holding members 17 and 17 ', and the twist bar holder 1
1, 11 'constitute an electric wire chuck means.

FIG. 5 shows a state where the twisting of the electric wire is completed. That is,
From the twisting start state of FIG. 4, the rotary actuator 2
When the cam plate 27 rotates counterclockwise by a predetermined angle by the rotation of 4, the twisting rod holders 11 and 11 'engaging with the cam pins 26 and 26', while holding the electric wire W, one twisting rod 10 Goes up and the other twisted rod 10 'goes down. Ascending and descending positions (top dead center and bottom dead center) of the twisted rods 10 and 10 'are determined by the rotary actuator 24 (cam plate 27).
Is determined by the rotation angle of. Thus, the cam plate 2 having the rotary actuator 24 and the cam pins 26, 26 '
7. Strand rod holders 11 and 1 having long holes 13 and 13 '
1'constitutes a reverse drive means.

In FIG. 6, while the electric wire W is sandwiched between the twisted rods 10 and 10 ', the twisted rod 10 moves up as shown by an arrow S, and the twisted rod 1
It shows a state in which 0 ′ descends as shown by arrow S ′ and the cut coating w ₂ is rotated as shown by arrow Q to start twisting the inner core wire w ₁ . At the same time when the twisting in FIG. 5 is completed, the wire w is pulled backward as indicated by the arrow R, so that the coating w ₂ is separated and removed from the wire.

As described above, the twist bar 10 for twisting the electric wire W,
Since 10 'makes a simple vertical movement by the reciprocating rotation of the cam plate 27, the twisting condition can be set or changed only by changing the air pressure of the air chuck 19 and changing only the holding force by the twisting rods 10, 10'. Well, the adjustment is very easy. Then, if the optimum conditions are determined according to the wire diameter of the insulation-coated wire, the material of the insulation coating, etc., the air pressure is read by the pressure gauge and recorded, so that the subsequent adjustment can be made more quickly and easily. It can be carried out. When the cutter unit A needs to be inspected or replaced, the work can be easily performed by moving the wire twisting unit B to the upper portion as shown in FIG.

[0018]

As described above, according to the present invention, an electric wire twisting device for holding an electric wire between a pair of opposing twisting rods and moving the pair of twisting rods in opposite directions by a drive mechanism to twist the electric wire. And a pair of twisted rod holders that support the pair of twisted rods at one end and a long hole is provided at the other end in a direction orthogonal to the twisted rods, and a pair of slidable rod holders that slidably hold the pair of twisted rod holders. A holding member; and a means for moving the pair of holding members in a direction orthogonal to the twisting rod so that the holding member can move toward and away from the twisting rod. A cam plate which rotates coaxially with the actuator and which is provided with a cam pin at a symmetrical position with respect to the rotation axis, wherein the pair of cam pins are loosely fitted in the elongated holes of the pair of twist bar holders, respectively. Therefore, a pair of twisted rods A pure vertical movement is performed, and the twisting conditions can be set and changed simply by changing the clamping force of the wire between a pair of twisted rods by air pressure at the electric wire chuck means. It can be carried out.

[Brief description of drawings]

FIG. 1 is a front view of an electric wire twisting device showing an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a right side view showing a state in which an air chuck or the like is raised in FIG.

FIG. 4 is a front view showing a twisting start state in which the wire cutter and the twist bar approach each other in the front view of FIG. 1;

5 is a front view showing the next twisted state of FIG. 4;

FIG. 6 is a perspective view of an essential part showing a twisted start state of an electric wire.

FIG. 7 is an explanatory view of a conventional wire twisting device.

[Explanation of symbols]

A cutter unit B electric wire twisting unit W electric wire w ₁ core wire w ₂ coating 10, 10 'twist bar 11, 11' twist bar holder 13, 13 'long hole 15, 15' guide rail 17, 17 'holding member 18, 18' Linear motion bearing 19 Air chuck 20, 20 'Leg piece 24 Rotary actuator 26, 26' Cam pin 27 Cam plate 34 Rodless cylinder 35 Cylinder barrel 36 Piston mount

Claims (2)

[Claims] 1. An electric wire is sandwiched between a pair of opposing twisted bars,
An electric wire twisting device for twisting an electric wire by moving the pair of twisted rods in opposite directions by a driving mechanism, the pair of twisted rods being supported at one end and being elongated in a direction orthogonal to the twisted rod at the other end. And a pair of holding members for holding the pair of twisted bar holders in a vertically slidable manner,
An electric wire chuck means for moving the pair of holding members in a direction orthogonal to the twist bar so that the holding members can be separated from each other, and the reverse direction drive means reciprocally rotates at a predetermined rotation angle; and the rotary actuator. A cam plate that rotates coaxially and that is provided with a cam pin at a symmetrical position with respect to the rotation axis, wherein the pair of cam pins are loosely fitted in the elongated holes of the pair of twist bar holders, respectively. Wire twisting device. 2. The electric wire twisting device according to claim 1, wherein the electric wire chuck means is operated by air pressure, and the force applied to the pair of twist bars is adjusted by air pressure.