JPH03114163A - Manufacture of slide brush - Google Patents

Abstract

PURPOSE:To provide a slide brush of good quality by furnishing a touch sensor to sense the over and under sides of an extra-thin wire in the position where the wire is fed horizontally, thereby optimally controlling the feed amount of the wire, and stabilizing the welding strength. CONSTITUTION:Twenty bobbins 2 on which an extra-thin wire 1 is wound are placed in sideways alignment and supported on the output shaft 12 of a motor 11, and each extra-thin wire 1 dangling at the bobbin 2 is positioned so as to be fed horizontally, where the over and under sides of the extra-thin wire 1 are sensed for eventual abnormality by the upper and lower parts 13, 13' of a touch sensor. After putting such wires 1 having passed the touch sensor in alignment and into a bundle by an aligning and bundling tool 14, they are passed through a guide 15. The foremost part of the bundle 5 of wires 1 is pressure welded by an upper and a lower electrode 14, 14' onto a base 6 made of phosphor bronze through a projection 6a while the bundle 5 is clamped by a holding jig 15a. this is followed bycutting of the bundle 5 using cutters 8, 8'. Then the foremost of bundle 5' welded to the base 6 is bent into an arc of a circle to form a contacting part 9. Thus a slide brush 10' is accomplished.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing a sliding brush.

(Prior Art) In recent years, with the development of electrical and electronic devices, a high degree of reliability is required of the contact parts, and they are incorporated and used in potentiometers, encoders, trimmers, and many other devices. In order to improve the reliability of sliding brushes, the contact stability is improved by using a sliding brush made of a bundle of wires arranged in parallel, that is, by making multi-point contact in point or surface contact. A sliding brush is used to increase the

As one method of manufacturing such a sliding brush, Fig. 2a
As shown in the figure, a predetermined number of bobbins 2 wound with ultra-fine wires 1 are arranged horizontally and rotatably supported, and the ultra-fine wires 1 are aligned from each bobbin 2 to a feeder 3 via an alignment and focusing jig 4. By moving the feeder 3 forward while pressing the wire bundle 5 with the wire holding jig 3a of the feeder 3, the wire bundle 5 is transferred to the position where it will be welded to the base material 6, and after welding to the base material 6 using the electrode 7.7'. As shown in FIG. 2, the wire holding jig 3a of the feeder 3 is slightly raised to move the feeder 3 backward, and then, as shown in FIG. Then, as shown in FIG.
There is a method of obtaining the sliding brush 10.

(Problem to be Solved by the Invention) By the way, in the above manufacturing method, since the ultra-fine wire l is forcibly pulled when being transferred by the feeder 3, the ultra-fine wire l wound on the bobbin 2 is pulled out. If it breaks,
It was something that could be deformed.

For this reason, there was a problem that the welding strength of the wire bundle 5' was unstable and a sliding brush of poor quality was produced.

Therefore, an object of the present invention is to provide a manufacturing method that can produce a sliding brush that does not get tangled, cut, or deformed when it is pulled out from the bobbin (therefore, the welding strength is stable and the sliding brush is of good quality). It is something to do.

(Means for Solving the Problems) In order to solve the above problems, the method for manufacturing a sliding brush of the present invention involves arranging a predetermined number of bobbins wound with ultra-fine wire horizontally and supporting them on the output shaft of a motor. At the position where the ultra-fine wire hanging down from each bobbin is fed horizontally, the motor is driven and stopped by a touch sensor that senses both the upper and lower sides of the ultra-fine wire, and the ultra-fine wire is intermittently fed out, passing the touch sensor. After sending the ultra-fine wire in the horizontal direction and aligning and focusing it with an alignment and focusing jig, the tip of the ultra-fine wire bundle is welded on the composite material using upper and lower electrodes, and then the wire bundle is cut to a predetermined length. The device is characterized in that a contact portion is formed at the tip.

(Function) According to the above method for manufacturing a sliding brush, the predetermined number of ultra-fine wires are not forcibly pulled (the bobbin is moved by a motor that is driven and stopped by sensing both the upper and lower sides of the ultra-fine wire by a touch sensor). Because it is rotated intermittently and the ultra-fine wire is drawn out by its own weight, it will not get tangled, break, or become deformed.

(Example) An example of the method for manufacturing a sliding brush of the present invention will be described together with a conventional example. First, one embodiment will be described. As shown in Figure 1a, <A g -P d 35wt% -P t
10wt%-A u 10wt%-Cu 14wt%
- 20 bobbins 2 wound with ultra-fine wire l of wire diameter Q and 09 mm made of 1wt% Zn are arranged horizontally and supported on the output shaft I2 of the motor 11, and the ultra-fine wire l hanging from each bobbin 2 is The motor 11 is driven and stopped by the touch sensor upper part 13 and lower part 13' which sense both upper and lower sides of the ultra-fine wire I at the position where the ultra-fine wire I is sent in the horizontal direction.
The ultra-fine wire I that has passed through the upper and lower parts 13 and 13' of the touch sensor is sent in the horizontal direction, and after being aligned and focused by the alignment and focusing jig 14, the wire bundle 5 is passed through the guide 15 while being clamped by the holding jig 15a. The tip of the wire bundle 5 of the ultra-fine wire 1 is made of phosphor bronze with a diameter of 5 mm and a width of 2.4 mm.
, a width of 0.2 mm and a height of 0.05 on a base material 6 with a length of 7 mm.
Upper and lower electrodes I4.1 through the projection 6a of mm
4', and then the electrode 14.1 is welded as shown in FIG.
4' is 4. with the base material 6 and the welded wire bundle 5 sandwiched between them.
The wire bundle 5 was moved 6 mm, and then the wire bundle 5 was cut into a length of 4.6 mm using a cutter 8.8' as shown in FIG. 1C. Thereafter, as shown in FIG.
A contact portion 9 was formed by bending the tip of the brush 10' into an arc shape to obtain a sliding brush 10'.

Next, a conventional example will be explained. As shown in FIG. 2a, 20 bobbins 2 wound with the same ultra-fine wires 1 as in the embodiment are arranged horizontally and rotatably supported, and the ultra-fine wires 1 are aligned from each bobbin 2 by a feeder 3. The wire bundle 5 aligned via the focusing jig 4 is held down by the wire holding jig 3a of the feeder 3, and the feeder 3 is moved forward to a position where it is welded to the same base material 6 as in the example, Upper electrode 7, lower electrode 7
After welding with the base material 6 at 8', the presser jig 3a of the feeder 3 is slightly raised to move the feeder backward as shown in FIG. The wire bundle 5 was cut into a length of 4.6 mm.

Thereafter, as shown in Fig. 2 d, the ultra-thin wire l
The tip of the wire bundle 5' was bent into an arc shape to form a contact portion 9, and a sliding brush 10 was obtained.

100 each of the sliding brushes of the example and the conventional example thus obtained.
Measure the welding strength of the wire bundle 5' of the ultrafine wire 1 for 0 pieces,
In addition, the appearance was inspected and the results shown in the table below were obtained.

In addition, defective products include dirt, scratches, and deformation of the ultra-fine wire.

In addition, the welding strength is 20% of the peel strength of each of the 20 ultra-fine wires.
These are the measurement results for my duty.

As is clear from the above table, the sliding brush of the example has higher welding strength of the ultra-fine wire bundle than the conventional sliding brush.
It can be seen that there is little variation and it is stable. In addition, while there were 31 defective products out of 1000 in the conventional sliding brush that had dirt, scratches, deformation, etc. on the fine wires, there were no such defects in the sliding brush of the embodiment. Ta.

Incidentally, in the above embodiment, the wire bundle is extracted by moving the electrode left and right, but the present invention is not limited to this, but the electrode is fixed and a feeder that can be moved left and right is used instead of the guide. But it's a good one.

(Effects of the Invention) As can be seen from the above explanation, according to the method of manufacturing a sliding brush of the present invention, the ultra-fine wires are intermittently transferred, and the number of ultra-fine wires between the bobbin and the alignment and focusing jig is reduced. touches the upper touch sensor, the motor is driven, and the ultra-fine wire is fed out. When the ultra-fine wire touches the lower touch sensor, the motor stops and the ultra-fine wire stops feeding out. The amount of the ultra-fine wire that is fed out is controlled, and the ultra-fine wire Since it is fed out by its own weight, it does not get tangled, break or deform, and therefore the welding strength is stable and a sliding brush of good quality can be obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a method for manufacturing a sliding brush according to the present invention, and FIG. 2 is a diagram showing a conventional method for manufacturing a sliding brush.

Claims (1)

[Claims] 1. A touch sensor detects both upper and lower sides of the ultra-fine wire at a position where a predetermined number of bobbins wound with ultra-fine wire are aligned horizontally and supported on the output shaft of a motor, and the ultra-fine wire hanging from each bobbin is sent horizontally. The motor is driven and stopped to feed out the ultra-fine wire intermittently, and the ultra-fine wire that has passed through the touch sensor is sent horizontally, and after being aligned and focused using an alignment and focusing jig, the tip of the ultra-fine wire bundle is A method for manufacturing a sliding brush, which comprises welding the wire bundle with upper and lower electrodes on a base material, and then cutting the wire bundle into a predetermined length to form a contact portion at the tip.