JPS5812505Y2 - Insulated wire separator removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a separator removing device for removing a separator bonded to the inner surface of the insulation coating of an insulated wire from which the conductor has been removed from within the insulation coating.

Generally, the insulated wire □ is as shown in Figure 1 a, l).
It is composed of a conductor 1 and an insulating sheath 2 that covers the conductor. When an insulating material such as rubber or polyethylene is used as the insulating sheath 2, a separator 3 made of cotton tape, plastic tape, etc. is used to cover the conductor 1. It is coated horizontally or vertically.

In such insulated wires, as part of quality inspection, a test piece is taken out from the manufactured insulated wire, the conductor 1 is extracted from this test piece, and then the separator 3 bonded to the inner surface of the insulation coating 2 is taken out. The tensile strength of the insulation coating 2 itself is measured.

Conventionally, a method as shown in FIG. 2 has been used to remove the separator 3 which is wound around a conductor and adhered to the inner surface of the insulating coating 2.

In other words, the ironing rod 5 is pressed at a substantially right angle to the longitudinal direction of the test piece 4 from which the conductor 1 has been extracted, and the ironing rod 5 is rotated in the longitudinal direction of the test piece 4 to peel off the separator 3 and the insulation coating 2. The conventional method was to allow the separator 3 to open and then pull out the end of the separator 3 with one's fingers.

However, in such a method, if the separation between the separator 3 and the insulation coating 2 is insufficient, the separator 3 may be cut due to the shearing force acting perpendicularly to the longitudinal direction of the separator 3, and a part of the separator 3 may be damaged. There was a problem that the test piece was left behind in the insulating coating 2, and the test piece was deformed during peeling and the test piece was damaged by the ironing rod 5, resulting in a loss of reliability of the tensile test data.

Furthermore, such a method requires a skilled worker and has the disadvantage that it takes a long time to prepare the test piece.

The present invention has been made to eliminate such conventional drawbacks, and includes a separator winding rod that is inserted into the cylindrical insulation coating of an insulated wire from which the conductor has been removed, and winds up the separator adhered to the inner surface of the insulation coating. An object of the present invention is to provide a separator removing device for an insulated wire, which is characterized by comprising a motor having one end of the separator winding rod fixed to a drive shaft, and a control device for controlling the rotation speed of the motor. .

The details of the present invention will be described below with reference to an embodiment shown in the drawings.

Note that parts common to those in FIG. 1 are indicated by the same reference numerals.

The separator removing device shown in FIG. 3 includes a winding rod 6 inserted into the insulation coating 2 of the test piece 4 from which the conductor 1 has been removed;
It is composed of a variable speed motor 11 that fixes one end of this winding rod to a chuck 10 fixed to one end of a drive shaft 7, and a control device (not shown) that controls the rotation speed of this variable speed motor. .

In the separator removing apparatus configured as described above, the separator 3 is removed from the insulation coating 2 by the method described below.

That is, the test piece 4 is inserted into the winding rod 6 whose one end is inserted into and fixed to the chuck 10 of the variable speed motor 11 until the winding rod 6 protrudes from the test piece, and then the variable speed motor 1
The end of the separator 3 of the test piece 4 located on the first side is fixed at an appropriate position on the winding rod 6 protruding from the test piece 4 toward the variable speed motor 11 side.

For fixing, if the winding rod 6 is a single wire, fix it directly with adhesive.
If the winding rod 6 is made of Nico stranded wire, this is done by inserting it into the gap between the strands.

Next, while holding the test piece 4 by hand, the variable speed motor 11 is rotated in the direction in which the separator 3 is unraveled, that is, in the same direction as the separator 3 wound around the conductor 1.

As a result, the separator 3 is wound around the winding rod 6 in a spiral shape in order from the variable speed motor 11 side toward the tip of the winding rod 6.

Note that it is preferable that the rotational speed of the variable speed motor 11 be appropriately controlled using an adjustment dial of the control device so that the separator 3 is not cut midway.

According to the separator removal device described above, the shearing force in the direction perpendicular to the longitudinal direction of the separator 3 hardly acts as in the case of the conventional method, so the separator 3 is cut in the middle by this shearing force. This will no longer happen, and the separator 3 will be completely removed from the test piece 4.

In addition, since the peeling work with the ironing rod 5 is unnecessary,
The test piece 4 is no longer scratched, and the reliability of the tensile test device is improved.

Furthermore, in the conventional method, the time required to prepare one test piece was approximately 10 minutes in the case of EP-FN electric wire, but with the separator removal device of this embodiment, it takes several tens of minutes. This can significantly shorten the test piece preparation time.

As described above, according to the separator removal device of the present invention, the separator will not be cut midway and left behind inside the test piece, and the test piece will not be damaged, so it can be used for tensile testing. Evening reliability will improve.

Furthermore, anyone can easily remove the separator regardless of skill level, and the time required to prepare the test piece can be significantly shortened.

[Brief explanation of drawings]

Fig. 1a is a vertical cross-sectional view showing an example of an insulated wire to which the device of the present invention is applied, b is a side view of the insulated wire with the insulation coating partially removed, and Fig. 2 is a conventional insulated wire. FIG. 3 is an explanatory diagram showing a method for removing a separator from an insulated wire, and FIG. 3 is a schematic diagram schematically showing a separator removing device according to an embodiment of the present invention. 1...Conductor, 2...Insulating coating, 3...
...Separator, 4...Test piece, 5...
...Stretching rod, 6... Winding rod, 11...
...Variable speed motor.

Claims (1)

[Scope of utility model registration request] 1. A separator winding rod that is inserted into the cylindrical insulation coating of an insulated wire from which the conductor has been removed and winds up the separator that is adhered to the inner surface of this insulation coating, and a motor that has one end of this separator winding rod fixed to a drive shaft. and a control device for controlling the rotation speed of the motor. 2. The separator removing device for an insulated wire as claimed in claim 1, wherein the motor is a variable speed motor. 3. The separator removing device for an insulated wire as claimed in claim 1 or 2, wherein the insulation coating is made of rubber.