JPH051982Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention adheres tapes of the same type on both the front and back sides by applying pressure, but in particular, it adheres to metal materials only by heating and not by applying pressure. Wrap an appropriate length of resin-based insulating tape such as silicone rubber in a pipe shape around the lead wire protruding from the carbon brush up to the other end connected to the power supply terminal, and pressurize it. It is bonded and has an insulating coating that maintains the shape of the insulated pipe.

(Prior art) The lead wires that protrude from carbon brushes for electric motors by being embedded at one end are bare twisted wires because of the need for embedding, so the carbon brushes with lead wires are heated using a mold. After pressing and manufacturing, it is necessary to apply an insulating coating to the lead wire. Conventionally, as shown in Figure 7, the lead wire was woven into a tube shape using materials such as cotton thread or glass fiber, and then an insulating varnish was applied as needed. The lead wire a is coated, or a silicone rubber tube b is cut to an appropriate size and fitted into the lead wire a, which has the drawback of poor fitting efficiency and an impact on manufacturing costs.

(Problems to be solved by the present invention) In view of the above, the present invention provides a technology to solve the problem by applying an insulating coating formed into a pipe shape with tape to the carbon brush lead wire, and fixing it in the pipe shape after coating. This is a major issue.

(Means for solving the problem) The purpose of this invention is to solve the technical problem mentioned in the previous section. Resin-based insulation tape such as silicone rubber 3
, the lead wire 2 protruding from the carbon brush 1
This invention relates to an insulating coating for a carbon brush lead wire, characterized in that the pipe shape 4 is coated with one or more turns to form a winding overlap 4a, and the winding overlap 4a is bonded by applying pressure. .

A preferred embodiment of the invention is described in the following section.

(Example) Figures 1 and 2 show the present invention, in which one end is embedded in a carbon brush 1 and a lead wire 2 protrudes.
However, when the same tape is used, it adheres under pressure.
A silicone rubber tape 3, which has the property of not adhering to a metal material only by pressure, is wound one or more times to cover the pipe shape 4 with an overlapping winding 4a.

The silicone rubber tape, which is the insulating tape material to be formed into the pipe shape 4, adheres when the front or back sides or the front and back sides are joined, and when pressure is applied, the adhesive strength increases and it does not separate. The lead wire made of stranded copper wire has a characteristic that it does not adhere only by pressure, and the present invention can use not only silicone rubber tape but also a resin-based insulating tape having the same characteristics. The presence or absence of the above characteristics can be confirmed by experiment.

3 to 5 show an apparatus for applying an insulating coating according to the present invention, in which the tape 3 has a cover tape 5 made of a tape other than a silicone resin film attached to one side and is wound in a spiral shape.

Reference numeral 6 denotes the above-mentioned tape feeding table, in which a lower feeding roll 7 is provided, an upper feeding roll 8 is provided opposite to the upper feeding roll 8, and guide rolls 9, 9 are provided above the upper feeding roll 8. and a cover tape take-up roll 10 are provided on the feed table 6,
Lower guide 11 and punch/cutter 1 above it
An A guide 13 and a B guide 14 are provided in the front and rear for reversible movement.
A is provided according to the thickness of the lead wire 2 as shown in FIG. Punch and cutter 12 is on table 6
A fixed cutter 15 is used at the corner of the insulating tape 3, and the structure is such that the fixed cutter 15 is rubbed to shear the insulating tape _3.As shown in FIG. It may be made smaller and a movable cutter _12-2 may be provided on the side of the lower end surface.

In the above-described device, both or one of the lower feed roll 7 and the feed roll 8 are driven by a step motor, and the take-up roll 10 is interlocked so as to be able to slip.
The lower feed roll 7 and the upper feed roll 8 feed the insulating tape 3 onto the feed table 6 by fixed lengths with the cover tape 5 facing upward, and the cover tape 5 is wound around the take-up roll 10 via the guide roll 9, and then Guide 11, punch/cutter 12, A guide 1
3. Each arcuate surface 11a, 12a, 1 of the B guide 14
The lead wire 2 is pushed into the circular part surrounded by the spaces 3a and 14a, and the insulating tape 3 having the above characteristics is fed out and wrapped as shown in FIGS. 3 and 4. After the insulating tape 3 reaches the state shown in FIG. 3, it is adhered to the upper surface of the tape 3, so it is easy to wrap it more than one turn as shown in FIG. By this winding, the lead wire 2 is covered with the pipe shape 4 with a winding overlap 4a, and when this winding is completed, the A guide 13 and the B guide are moved away in the opposite direction as shown in FIG. Then, the lower feed roll 7 and the upper feed roll 8 are automatically stopped, and the punch/cutter 12 is lowered as shown in FIG. 5 to cut the insulating tape 3 in cooperation with the fixed cutter 15.
At the same time as the above-mentioned pressing down, the wound layer 4a of the insulating tape 3 is pressed to cause adhesion by pressure, and from this state, the punch/cutter 12 is moved back to the position shown in FIG. 3 to extract the lead wire 2.

By repeating the above operations, the insulating tape 3 is wound one after another around a large number of lead wires 2, and the wound overlaps 4a of the pipe shape 4 are adhered.

Pressure bonding can also be performed manually when the lead wire 2 is extracted as described above.

(Functions and Effects) The present invention selects resin-based insulating tape 3 such as silicone rubber, which has the property of adhering to similar tapes under pressure (pressure sensitivity) but not adhering to metal materials under pressure, and using a carbon brush. 1 lead wire 2
is coated with a pipe-shaped 4 having one or more windings and a winding overlap 4a, and the above-mentioned winding overlap 4a is applied.
The pipe shape 4 is held by bonding the pipe shape 4 under pressure, and the insulating tape 3 that has become the pipe shape 4 does not come off even if the pipe shape is pulled forcefully over time, and the adhesive tape 3 does not peel off even if the pipe shape is pulled forcefully over time. Since metal has the property of not causing adhesion, since it is attached to the motor, there is no risk of adhesion to the metal, and bending can be easily adjusted with fingers, and the insulated pipe shape of the outer periphery of the lead wire 2 can be maintained for a long time. It has the effect that it can.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the present invention, Figure 2 is a lead wire 2
FIG. 3 to 5 are sectional views showing the coating molding apparatus of the present invention, and explain the working order. FIG. 6 shows the punch/cutter _12-1 shown in FIGS. 3 to 5. FIG. 7 is a perspective view showing the conventional insulation coating of the lead wire a. 1...Carbon brush, 2...Lead wire, 3...
...Insulating tape, 4...Pipe shape, 4a...Overlapping windings.

Claims (1)

[Scope of utility model claims] A resin-based insulating tape 3 made of silicone rubber or the like, which adheres to similar tapes under pressure but does not adhere to metal materials under pressure, is wound one or more turns around the lead wire 2 protruding from the carbon brush 1. Coating the pipe shape 4 with the winding overlap 4a,
An insulating coating for a carbon brush lead wire, characterized in that the winding overlap 4a is bonded by applying pressure.