JPH036107Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention mainly involves inserting and crimping a plurality of thin wires, which are bare conductor portions from which the end coating of a covered electric wire has been peeled off, into the sleeve of a crimp terminal and crimping the electric wire. It is used to twist and bundle the bare conductor parts of electric wires before physically connecting them, and also to solder, braze, weld, screw, wrap, etc. the bare conductor parts of multiple thin wires. Therefore, it is used for twisting and binding parts and elements of various electrical equipment when connecting them, and more specifically, it is used to twist and bundle the parts and elements of various electrical devices.More specifically, it is used to twist and bind the parts and elements of various electrical devices. Wire clamping pieces that swing in the direction of clamping the plurality of thin electric wires against the biasing force due to the centrifugal force of the rotation of the holder, that is, in the centripetal direction, are provided at a plurality of separated locations, and the wires are clamped by these wire clamping pieces. The present invention relates to an electric wire twisting machine configured to twist and bundle groups of fine wires as the electric wires are pulled out and moved in the longitudinal direction.

<Prior art> Generally, in this type of electric wire twisting machine, as shown in Fig. 7 of the attached drawings, a wire clamping piece is applied to a position near the base end of a bare electric wire portion to achieve sufficient twisting action. The coated tip of the coated wire is inserted through the wire insertion port so that the Therefore, the conventional electric wire insertion port is suitable for twisting when the bare wire portions of the ends of multiple covered wires are inserted into the sleeve of one crimp terminal and connected by crimp. The wire insertion port has a large diameter because the tip of the sheath needs to be inserted into the wire insertion port and the air from the air motor needs to be discharged forward and outward from the wire insertion port. It was formed into something.

<Problems to be solved by the invention> However, when twisting and binding thin wires with small wire diameters, a large gap is created between the inner periphery of the wire insertion opening and the outer periphery of the wire, making it difficult to position the thin wires at the rotation axis of the holder. As a result, part of the wire may be cut off during twisting, or uneven twisting may occur, resulting in deterioration in twisting performance. Therefore, it is conceivable to make the electric wire insertion port small in diameter so that the cover body can be attached and removed so that thin wires can be twisted and bundled. It is difficult for air to be discharged to the outside, so the inside of the cover body is under high pressure and air density, and the air discharged from the wire insertion port becomes high pressure and rapid, disrupting the parallelism of the bare thin wires and spreading them in the radial direction. The disadvantage was that it was not possible to give a proper twisting effect. In addition, since the holder is rotated at high speed under such conditions, the twisting machine heats up and generates a large amount of noise, which worsens the working environment.

The object of the present invention is to provide an electric wire twisting machine for thin wires that can solve all of these drawbacks.

<Means for Solving the Problems> In order to achieve the above object, the structure of the present invention will be explained using FIGS. 1 to 5, which correspond to embodiments. A rotatable arm holder 7 linked to the motor 2
The swinging arms 10 are arranged at approximately equal intervals on the peripheral wall of the arm holder 7, and are connected to the tips of a plurality of swinging arms 10, which are swingably supported by pins on the arm holder 7.
It has a plurality of wire clamping pieces 14 that are configured to move in the centripetal direction due to rotational centrifugal force of the arm holder 7, and these wire clamping pieces 14...
In a wire twisting machine configured to twist and bundle naked wires a held between them, a cover that covers the outer periphery of the wire clamping pieces 14 and has a wire insertion opening 17a on one end side. The electric wire insertion opening 17a of the body 17 has a small diameter, and an exhaust opening 15 for discharging air from the air motor 2 to the outside is formed in the outer peripheral portion 13 of the electric wire insertion opening 17a.

<Function> According to the wire twisting machine according to the present invention having such a configuration, even when twisting and bundling thin wires, the wire insertion opening 17a having a small diameter corresponding to the wire diameter allows the thin wires to be tied to the rotation axis of the holder 7. The insertion position can be accurately positioned almost coaxially with the

In addition, most of the air discharged from the air motor is discharged to the front from the discharge port 15 formed on the outer periphery 13 of the wire insertion port 17a, so the amount of air discharged from the wire insertion port can be significantly reduced. Even if the bare wire is thin, it can provide good twisting action while maintaining parallelism.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings.

Figures 1 to 5 show an embodiment of the present invention, in which the main structure of the wire twisting machine is driven by an air motor 2 housed inside a cylindrical case 1 having an air outlet 1' at one end. A rotary shaft 3 is rotatably supported via a shaft fixing body 4 and a bearing 5,
An operating lever 6 for rotating and stopping the air motor 2 is provided at the base end of the cover 1, and an arm holder 7, which is an example of a driving rotation member, is attached to the tip of the rotating shaft 3 so as to be integrally rotatable with a bearing 8. It is fixedly connected coaxially with the rotating shaft 3 via a lock bolt 9. The arm holder 7 has a substantially square U-shaped notch 7a when viewed from the front (in the direction of the rotational axis) at a position near the tip and at an intermediate position.
. . , 7b . . . are fixed at equidistant positions with a phase angle of approximately 120 degrees, respectively, and a wire clamping piece 14 is connected to the distal end and a weight portion 10a is connected to the proximal end. The provided arm 10 is connected to each of the U-shaped notches 7a of the distal annular member 7A.
It is structured such that it is swingably supported by a pivot pin 11.

The arm 10 has a spring 12 interposed between the arm 10 and the arm holder 7.
The wire clamping piece 14 side is always urged to be in an open position. In order to accommodate these arm holders 7... and arms 10..., a tapered small-diameter electric wire insertion opening 17a is formed, and the diameter becomes smaller toward the inner side of the central portion of one end, and the outer circumferential portion 13 of the electric wire insertion opening 17a is formed with a small diameter. , a threaded portion formed on the outer peripheral surface of the distal end side of the cylindrical casing 1, in which a cylindrical cap 17 having a plurality of exhaust ports 15 for discharging the air discharged from the air motor 2 forward and outward; It is removably screwed onto the.

In the wire twisting machine configured as described above, an operator grasps the cylindrical casing 1 with one hand, and holds the wire A with the other hand (or holds the wire twisting machine fixed to a fixed base).
After grasping the covering portion b of the wire and inserting the tip of the bare wire portion a through the guide port 17A, the air motor 2 is rotated by operating the lever 6 to drive and rotate the arm holder 7. In this case, the air discharged from the air motor 2 passes through the circumferential portion of the holder 7 as shown by arrow A, and is discharged straight from the discharge port 15 in a substantially straight line. (See Figure 3.) (If multiple wires are to be twisted and bundled, a conventional large-diameter wire insertion opening 16a may be formed in place of the cylindrical cap 17 as shown in Figure 7.) The cylindrical cap 16 can be replaced and attached to the casing 1. In this case, the air discharged from the air motor 2 is discharged to the outside from the wire insertion port 16a as shown by arrow B.) In this state, pull out the wire and move it. In particular, the twisting work is performed.

<Another embodiment> In the embodiment shown in FIG. 6, a cylindrical casing 1A is formed with a threaded portion 1a formed on the outer peripheral surface of the tip side, and is extended to a position covering the wire clamping pieces 14... A screw having a large-diameter wire insertion port 16a similar to that shown in FIG. 7 and a tapered insertion guide port 16b connected to the insertion port 16a, and screwed into the threaded portion 1a. A guide body 16A having a portion 16c formed therein, a tapered small-diameter insertion guide port 17b connected to the thin wire insertion port 17a, and an outlet 15 for discharging air from the air motor 2 on its outer periphery. The thin wire guide body 17A is formed with a threaded portion 17c for screwing into the threaded portion 1a, and is configured to be replaceable with respect to the casing 1A.

<Effects of the invention> As is already clear from the detailed description above, the wire twisting machine according to the invention can easily align wires almost concentrically with the rotational axis of the holder even when twisting and binding thin wires. Fine lines can be positioned accurately,
Moreover, it is possible to maintain the parallelism of the thin wires and provide a good twisting effect, thereby making it possible to dramatically improve work efficiency.

Moreover, the air discharged from the air motor can be quickly discharged to the outside of the casing almost straight from the air outlet formed separately from the wire insertion port, which prevents the twisting machine from overheating and suppresses noise. This made it possible to significantly improve the working environment.

[Brief explanation of the drawing]

Figures 1 and 2 are partially cutaway perspective views of the main parts, Figure 3 is a partially longitudinal side view of the center, Figures 4 and 5 are enlarged cross-sectional views of the main parts, and Figure 6 is a separate view of the main parts. FIG. 7 is a vertical cross-sectional view of a part of a conventional electric wire twisting machine having a large-diameter electric wire insertion port. In the figure, 2 is the motor, 7 is the arm holder, and 10
13 is a swing arm, 13 is an outer circumferential portion, 14 is an electric wire clamping piece, 17 is a cover body, 17a is an electric wire insertion opening, and a is a bare electric wire.

Claims (1)

[Claims for Utility Model Registration] The air motor 2 is arranged at approximately equal intervals on the peripheral wall of a rotatable arm holder 7 that is interlocked with the air motor 2, and is pivotally supported by pins to the arm holder 7 so as to be swingable. The arm holder 7 is connected to the tip of a plurality of swinging arms 10, respectively.
It has a plurality of wire clamping pieces 14 configured to move in the centripetal direction by rotational centrifugal force, and twists the bare wire a held between these wire clamping pieces 14. In a wire twisting machine that is formed to bundle wires, the wire insertion opening 17a of a cover body 17 that covers the outer periphery of the wire clamping pieces 14 and has a wire insertion opening 17a on one end side is connected to a small diameter wire twisting machine. An electric wire twisting machine having an outer circumference 13 formed with an outlet 15 for discharging the air discharged from the air motor 2 to the outside. The electric wire twisting machine according to claim 1, wherein there is one outlet 15 for discharging air to the outside. The electric wire twisting machine according to claim 1, wherein a plurality of exhaust ports 15 for discharging air to the outside are formed. The wire twisting machine according to claim 1, wherein a plurality of discharge ports 15 for discharging air to the outside are arranged around the wire insertion port 17a at equal intervals.