JPH043537Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention mainly involves inserting and crimping a plurality of bare conductor parts from which the end coating of a covered electric wire has been peeled off into the sleeve of a sleeve-type crimp terminal. It is used to twist and bundle multiple bare conductor wires before electrically and physically connecting the wires together.In addition, it is used to bundle multiple bare conductor wires by soldering, brazing, welding, It is used for twisting and binding parts and elements of various electrical equipment when connecting them by screwing, wrapping, etc. At multiple locations spaced apart or approximately equally spaced,
an arm that is swingable around an axis substantially orthogonal to the rotational axis of the rotating member; A wire clamping piece that swings in the wire clamping direction against the biasing force due to the rotational centrifugal force of the rotating member is provided at the tip of each of these arms, and the wire clamping pieces that are clamped by the wire clamping pieces move in the longitudinal direction. A cylindrical cap is provided to surround the drive rotating member, the arm, and the wire clamping piece group, and a cylindrical cap is provided at the tip of the cylindrical cap. The present invention relates to a wire twisting machine in which a wire group insertion guide opening is formed to be connected to the wire insertion opening surrounded by the wire clamping piece group.

<Prior Art> The wire twisting machine having the structure described in detail above was developed by the inventors of the present invention and has already filed a patent application such as Japanese Patent Application No. 40844 of 1988. Compared to the previously known wire twisting machines of this type, the wire twisting machine of the earlier application has a larger wire clamping force and excellent twisting and bundling performance. It has achieved the advantage of being able to be made smaller and smaller in diameter, making it extremely easy to handle, especially when it is a hand-held type.

However, in the prior application, the turning on/off operation of the rotary drive source required for each twisting operation of one unit of electric wire group was of a manual type.

<Problems to be solved by the invention> Therefore, in the above-mentioned earlier application machine, when twisting operations are performed almost continuously one after another, hundreds to thousands of times a day, the operator must , it is necessary to turn on and off with one hand, which is complicated and troublesome, and not only causes a large amount of work loss, but also causes great work fatigue. Particularly in the case of a hand-held type, in which the device is held in one hand and the wires are held in the other hand, work loss and
Work fatigue is even more pronounced. Furthermore, in this twisting machine, since it is necessary to perform the insertion operation after inserting the wire group, the operation is difficult as a practical matter, and it is easy to cause an excess or deficiency in the insertion length and eventually the twisting length. It is also possible to construct a hood switch type without using hands, but using feet in addition to both hands reduces work efficiency and increases fatigue, which is impractical.

<Means for solving the problem> In view of the above circumstances, the purpose of the present invention is to provide a device that can perform continuous twisting work rationally and efficiently without requiring special operations. In order to achieve the object, the hand-held electric wire twisting machine according to the present invention has the configuration described in detail at the beginning, in which the end portions of the wire group to be twisted are placed within the opening to a set length on the front end surface of the driving rotating member. A control mechanism is provided in which a proximity switch is installed as a sensor switch that detects the insertion of the drive member, and a control mechanism is provided that automatically and reversibly operates an air motor as a rotational drive source of the drive rotation member based on the detection operation of the sensor switch. The operation control mechanism has a configuration in which the detection length by the sensor switch can be set and changed, and a timer for setting and changing the operating time length of the air motor starting from the detection operation time point. It is characterized by its configuration.

<Function> According to the electric wire twisting machine according to the present invention having the characteristic configuration as described above, in the non-detection state of the sensor switch where the twisted end portion of the electric wire group is not inserted into the electric wire insertion opening, the rotational drive source and the rotating member stops operating, and the plurality of line clamping pieces group is oscillated in a direction away from the axis of the rotating member,
Since the wire insertion opening formed by the wire clamping piece group is in an open state, the plurality of bare conductor wires to be twisted and bundled are passed through the tapered insertion guide opening at the tip of the cylindrical cap and their uncoated peeled ends are inserted. By inserting the wire from the front of the device to a depth where the wire clamping piece reaches the position where the wire clamping piece exists, the bare conductor wire can be easily and smoothly inserted into the insertion opening while converging and guiding the wire toward the center of rotation. Then, when the bare conductor portion is inserted into the opening for a set length, the sensor switch detects this,
Based on the detection operation of this sensor switch, the rotation drive source is automatically started to operate, the drive rotation member rotates, and the rotational centrifugal force causes each wire clamping piece to swing toward the rotation extension axis, as described above. The vicinity of the proximal end portions of the plurality of bare conductor portions inserted and held as shown in FIG.
By pulling out and moving the plurality of electric wires in the direction opposite to the insertion direction described above in this sandwiched state, it is possible to apply a twisting force to the plurality of bare conductor portions and twist and bind them. be.

Furthermore, since the sensor switch is a proximity switch, it detects only when the ends of the wires come close to each other.Therefore, there is no risk of the ends of the wires being strongly pressed against the sensor surface and being "squeezed", making the twisting process smoother. and can be carried out accurately and quickly.

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

In FIGS. 1 to 8, reference numeral 1 denotes a drive rotor that is rotatably supported via a bearing 10 that is fitted into a bottomed cylindrical holder 15 that is fitted into the tip of a cylindrical grip cover 8. This shaft is an example of a rotational drive source, and is directly connected to and interlocked with the air motor 6 built into the base end of the grip cover 8. The grip cover 8 has an outer diameter of about 30 mm and can be firmly gripped with one hand. It is configured in a hand-held format that can be held. Reference numeral 11 denotes an arm holder, which is an example of a drive rotating member configured to be fixedly connected concentrically to the tip of the rotating shaft 1 via a bearing 16 and a lock bolt 12 so as to be able to rotate integrally with the rotating shaft 1. An annular member 11 having different wall thicknesses is provided near the tip in the direction of the cylinder axis and at a position a suitable distance behind the tip.
A, 11B are integrally connected, and three locations on the circumferential walls of these annular members 11A, 11B are spaced at equal intervals of 120 degrees at a center angle in the circumferential direction of rotation, as viewed from the front (as viewed in the direction of the axis of rotation). Approximately square U-shaped cuts 11a and 11b are formed in the holes. 2
are three arms disposed at equal intervals in the circumferential direction of rotation, and are fitted into and held in each of the notches 11a on the distal end side of the holder 11, and each of these arms 2
The distal end portions thereof have a relatively long protruding length toward the axial extension direction of the rotating shaft 1 from the distal end surface of the holder 11, and the proximal end portions are fitted into the respective notches 11a, Each of the arms 2 is configured to be swingable around the axis of the pin 13. Then,
The detailed structure of each arm 2 will be explained as follows.
As clearly shown in FIGS. 6 and 7, the distal end portion of each arm 2 is moved away from the axis of the rotating shaft 1 by the centrifugal force of rotation of the rotating shaft 1 to the proximal end side. A weight part 3 that acts so as to swing in the direction of the extension axis of the arm 2 is integrally connected in a straight line in a direction opposite to the tip side of the arm 2. 11b, and the distal end portions of each arm 2 are in contact with each other as shown in FIG. At all times (when the rotation is stopped), the stranded electric wires are kept biased in the open state as shown in FIG. As shown in Fig. 5, wire clamping pieces 5 are arranged in series to close the insertion opening 4, and this structure is made of a material such as carbon tool steel so that it can be made in one piece and generally in a straight line. It is structured like this. Each of the wire clamping pieces 5 has a relatively wide rectangular plate shape along the direction of the swing axis of the arm 2, and has an inclined position such that the closer to one end it approaches the swing axis in the width direction. It is composed of Reference numeral 9 denotes a cylindrical cap that is removably attached to the tip of the grip cover 8 via a threaded portion 17 so as to house the holder 11 and the second group of arms; An electric wire insertion guide port 9A is formed in the opening 4 so as to be concentrically connected to the opening 4, and the guide port 9A is formed in a tapered shape with an inner diameter gradually decreasing toward the side closer to the opening 4. At the same time, a portion of the peripheral wall of the cap 9 near the position of the group of wire clamping pieces 5 is provided to allow high-pressure air, which is bled into the cap 9 from the air motor 6 during operation, to escape to the outer periphery of the cap 9. A slit-like hole 20 is formed to discharge and remove so-called scum, such as broken wire ends, generated during twisting on the escape air flow to the outside of the cap 9. Reference numeral 7 denotes a sensor switch using a proximity switch (reed switch) attached to the distal end surface of the arm holder 11, and detects when the bare conductor part b is inserted into the opening 4 to a set length. A control mechanism 24 automatically and reversibly operates the air motor 6 based on the detection operation of the sensor switch 7.
As shown in FIG.
A timer that controls the electromagnetic valve 24A interposed in the air supply path 23 to the air motor 6, and can change the setting of the operating time length of the air motor 6 starting from the detection operation of the sensor switch 7 according to the skill level, etc. 2
5, and a solenoid valve in which a sensitivity adjuster 26 is installed in series with the contact 7a of the sensor switch 7 to enable the sensor switch 7 to change the detection length (twisted binding length) of the bare conductor portion b. It is equipped with a control circuit. 21 is air motor 6
18 is an air compressor, and 19 is an air bleed valve.

The electric wire twisting machine configured as a hand-held type as described above is used by an operator who grasps the grip cover 8 with one hand, grasps the covering part a of the electric wire A with the other hand, and twists the bare conductor parts b of the plurality of ends. The opening 4 is inserted into the opening 4 through the center guiding action of the tip insertion guide port 9A of the cylindrical cap 9.
When the insertion length reaches the set value, the sensor switch 7 is activated, the air motor 6 starts operating via the control mechanism 24, and the timer 2 is activated.
5 for a preset length of time. As the air motor 6 operates, the rotating shaft 1 and the holder 11 are driven and rotated to perform the twisting operation as explained in the section of the above-mentioned function. Most of the air that bleeds into the cap 9 escapes to the outside side from the hole 20 formed in the peripheral wall of the cap 9, and the residue generated inside the cap 9 is discharged to the outside together with the escaped air. Information gate 9
At the same time, the blowback from A is suppressed, and the air density inside the cap 9 is maintained at a relatively low state, so that the so-called wind blowing caused by the high speed rotation of the wire clamping piece 5, the arm 2, and the group of weight parts 3 is suppressed. When the sound decreases, the sound deadening effect is exerted.

The sensor switch 7 is attached to the tip of a screw member 27 that is screwed and connected to the tip of the holder 11 so that its position can be changed and fixed, so the position of the switch 7 can be adjusted at will according to the required length of the twisted bundle. .

<Effects of the invention> As is clear from the detailed description above, when the present invention is used, all that is required is to grasp the ends of the group of wires to be twisted and bundled with fingers and insert them into the wire insertion opening.
When it is inserted to the set length, it automatically enters the rotational drive source and starts the twisting action, so no special manual operation is required, and therefore the twisting work is very efficient with less work loss. In addition to being able to perform tasks easily, with less mental and physical fatigue. As mentioned above, since the sensor switch is a proximity switch, it detects the proximity of the wire end before it comes into contact with it, and therefore the wire end is strongly pressed against the sensor surface and the wires are aligned. Twisted wire processing can be performed accurately and with high efficiency without fear of disturbing the state. Furthermore, since the sensor switch is located deep within the cylindrical cap for safe use, the sensor switch can be protected and the occurrence of defective products due to malfunction can be minimized. In addition, it has become possible to expect effects such as making it easier to keep the timing of the operation constant, and being able to reliably and accurately twist and tie the desired length.
Further, since the sensor switch is adjustable in position and the timer can be used to arbitrarily change the time from the point of detection by the switch to the point in time when the air motor stops operating, it is possible to easily adapt to various twisting specifications including twisting length. It has become possible to avoid inconveniences such as excessive twisting or insufficient twisting.

[Brief explanation of the drawing]

1 to 8 show one embodiment of the present invention, and FIGS. 1 and 2 are partially cutaway perspective views of the main parts, FIG. 3 is a partially cutaway side view, and FIGS. 5 is an enlarged longitudinal sectional front view of the main parts corresponding to FIGS. 1 and 2, FIGS. 6 and 7 are enlarged side views and plan views of the components, FIG. 8 is a control system diagram, and FIG. The figure is an enlarged vertical cross-sectional view of main parts showing another embodiment. 11 is a drive rotation member, 2 is an arm, 3 is a weight part, 5 is a wire clamping piece, 6 is a rotational drive source (air motor), 7 is a sensor switch, 9 is a cylindrical cap,
23 is an air supply path, 24 is an operation control mechanism, 24
A is a solenoid valve, and 25 is a timer.

Claims (1)

[Scope of utility model registration request] At a plurality of locations on the circumference of the drive rotating member 11 at equal or approximately equal intervals in the rotational circumferential direction, the rotating member 1
An arm 2 that is swingable around an axis substantially orthogonal to the rotation axis of the rotation member 1 is connected to the rotation member 11 at its tip end.
The arms 2 are pivotally supported in such a manner that they protrude relatively longer in the direction of the rotational axis than the end surfaces of the arms 2, and the ends of the arms 2 are pivoted in the wire clamping direction against the biasing force due to the rotational centrifugal force of the rotating member 11. The wire clamping pieces 5 are provided so that the electric wires clamped by the wire clamping pieces 5 can be twisted and bundled as the group of electric wires is pulled out along the longitudinal direction. A cylindrical cap 9 surrounding the 5 groups of wire clamping pieces is provided, and a wire group insertion guide is provided at the tip of the cylindrical cap 9 to connect to the wire insertion opening 4 surrounded by the 5 groups of wire clamping pieces. A sensor switch 7 having an opening 9A formed therein and detecting that the twisted end portion of the wire group has been inserted into the opening 4 for a set length is provided on the distal end surface of the driving rotating member 11.
In the hand-held electric wire twisting machine that is installed so that the setting of the insertion detection length can be changed, the sensor switch 7 is a proximity switch, and when the proximity of the end portion of the wire group to be twisted is detected, the drive rotating member 1
An operation control mechanism 24 that automatically and reversibly operates the air motor as the rotational drive source 6 of the first embodiment controls the solenoid valve 24A of the air supply path 23,
The electric wire twisting machine characterized in that the operation control mechanism 24 includes a timer 25 that can set and change the length of operation time starting from the detection operation of the sensor switch 7 of the rotational drive source 6.