JPH0129004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for regenerating magnetic switches used in automobile starters and the like.

Generally, as shown in Fig. 1, a magnetic switch has a metal cylinder 1 housing a solenoid in a substantially cylindrical shape, with screw holes 2 and 3 bored in both axial end faces of the metal cylinder 1, and one A lead wire 4 is provided to protrude from the end face of. One end of this metal cylindrical body 1 is fixed to a bracket 7 of the starter body with a screw 6 via two gaskets 5 to maintain liquid tightness. Further, a reciprocating punch 8 that moves forward and backward in the metal cylindrical body 1 faces inside the bracket 7, and is always projected outward by a spring 9. A shift lever 10 is loosely fitted to the tip of the reciprocating punch 8, and the shift lever 10 is connected to a pinion or the like. Further, a cover 11 is attached to the other end surface of the metal cylinder 1 through a screw 13 via a packing 12 which also serves as insulation.
One of the lead wires 4 passes through the cover 11 and protrudes, and a connecting terminal 14 is connected to the tip thereof. Further, the other lead wire 4 is connected to a substantially L-shaped connection terminal 15, and this terminal 1
5 penetrates the cover 11 and protrudes to the outside.

In order to take such a magnetic switch out of a scrapped vehicle and recycle it, the conventional method is to first remove mud and rust from the metal cylinder body 1, cover 11, etc., apply rust prevention, and then improve the appearance by plating or painting. The cover 11 is prepared by applying new gaskets 5 and 12, which have been prepared and cut into predetermined shapes, to both end surfaces.
was fixed and attached to bracket 7 of the starter body. However, in this recycling method, many steps are required for recycling, as mud and rust are thoroughly removed, degreased and rust-prevented, and then plated or painted. Water may enter the inside of the bracket 1, deteriorating the electrical characteristics, and a new gasket 5 must be remade and installed in order to be attached to the bracket 7, which is troublesome and expensive.

The present invention was made in order to improve the above-mentioned drawbacks. After removing some mud and rust from the metal cylinder, a heat shrink tube is placed on the metal cylinder, and then heated so that the heat shrink tube becomes attached to the outer periphery of the metal cylinder. This is a method in which both end faces are brought into close contact with each other so as to cover part or all of them. By using this method, the heat-shrinkable tube can be used as an exterior coating, packing, rust prevention, and insulation, and there are fewer recycling steps, and there is no need for plating or painting, so there is no water intrusion, and installation is easy. It also becomes extremely easy.

Hereinafter, one embodiment of the method for regenerating a magnetic switch according to the present invention will be described first with reference to the method shown in FIG.

(1) Remove the magnetic switch from the car starter and disassemble it to the minimum extent necessary.

(2) Each part is treated to remove mud, degrease and prevent rust. The connection terminals 14 and 15 are removed by melting the solder portions.

(3) A tube 1 that is approximately cylindrical and slightly longer than the metal cylinder 1 is attached to the metal cylinder 1 in this state.
Place 6 on top so that it is approximately in the center. This tube 16 is heated and shrunk at approximately 200°C, for example.
It is made of a heat-shrinkable thin film that can withstand heat of 600℃ or more. Depending on the purpose of use, other materials may be used.

(4) When the tube 16 is heated to approximately 200°C by hot air or the like, the tube 16 contracts and comes into close contact with the metal cylindrical body 1, and both ends of the tube contract while bending inward at approximately right angles. closely to the cylinder body 1;
Depending on the purpose, it can become a packing part 17 or an insulating part 18.

(5) After covering the outer surface and substantially outer edge surfaces of both end surfaces of the metal cylindrical body 1 with the heat-shrinkable thin film, the third
As shown in the figure, a through hole 19 is drilled at a location corresponding to the screw hole 2 of the packing portion 17, a lead wire hole 20 is drilled at a location corresponding to the lead wire 4 of the insulating section 18, and The lead wire 4 is led out from the lead wire hole 20.

(6) An L-shaped connecting terminal 15 is fixed by adhesive to the part that serves as the packing part 17 and the insulating part 18, near one of the lead wires 4, and the one lead wire is attached to this connecting terminal 15. Connect 4 by soldering or the like. After the cover 11 is attached to the metal cylinder 1, it is attached to the bracket 7.

Figure 4 shows another embodiment in which a jig 2 is installed in the screw hole 2 in advance.
After the tube 16 is fitted, the tube 16 is heated and shrunk to prevent the packing portion 17 from blocking the screw hole 2.

FIG. 5 shows still another embodiment, in which the packing part 17
A through hole 19, a lead wire hole 20, and a terminal hole 22 are drilled in advance at predetermined positions of the insulating portion 18 in anticipation of the degree of heat shrinkage, and the tube 16 is placed over the metal cylinder 1 and each lead wire 4 is inserted. The tube 16 is made to pass through the lead wire hole 20 and then heat-shrinked to be tightly fixed around the metal cylindrical body 1.

The present invention employs the method described above, so that when remanufacturing a magnetic switch that has been used once, the appearance can be improved by simply covering the metal cylinder surrounding the solenoid with a thin heat-shrinkable tube and then heating it. Moreover, it is very easy to work with, and there is no risk of water getting inside due to plating or the like and damaging the electrical characteristics, and the work of mounting it on the bracket is easy. Furthermore, since the film that is folded and adhered to the end face serves as a packing or insulating film, there is no need for additional packing or insulating plates, making assembly easy and reducing the number of parts.

[Brief explanation of drawings]

Fig. 1 shows the installation state of a general magnetic switch, and Fig. 2 and the following show an embodiment of the method for regenerating a magnetic switch according to the present invention.
Figure 2 is a diagram showing the state before heat shrinking the tube, Figure 3 is a diagram showing the state after heat shrinking the tube,
Figure 4 is a diagram showing another embodiment in which the tube is heated and shrunk after fitting the same jig into the screw hole;
The figure shows still another embodiment in which the tube is heat-shrinked after previously forming through-holes and the like. 1...Metal cylindrical body, 2, 3...Screw hole, 4...Lead wire, 5, 12...Packing, 7...Bracket, 11
…Cover, 16…Tube, 17…Packing part,
18... Insulating section, 19... Through hole, 20... Lead wire hole, 21... Jig, 22... Terminal hole.

Claims (1)

[Claims] 1. A heat-shrinkable tube that is slightly longer than the metal cylinder is placed over the metal cylinder that surrounds the solenoid and serves as the main body of the magnetic switch, and the tube is heat-shrinked to tightly coat the outer periphery and both end faces of the metal cylinder. The covered part is an exterior part, and the part that covers both end surfaces of the metal cylinder is a packing part, and one packing part is sandwiched between the metal cylinders, and this metal cylinder is used for an automobile chassis or a starter motor. A method for remanufacturing a magnetic switch, characterized in that a bracket for mounting is attached, and a cover for protecting an end face of the metal cylinder is attached to the metal cylinder so as to sandwich the other packing part.