JPH0379929B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for stripping off a covering over a relatively long range in the middle part of a covered electric wire.

(Prior art) Conventionally, as mentioned above, in order to strip off the coating over a relatively long range in the middle part of a covered wire, first cut in the circumferential direction with a knife at both ends of the stripped part, and then An axial cut is made manually with a knife or the like between the directional cuts, and the coating at the peeled portion is finally torn off with nippers or the like to expose the core wire.

However, since the coating at the peeled portion is manually removed, there is a problem that efficiency is low and costs are high.

(Object of the Invention) The present invention was made to solve the above-mentioned conventional problems, and its purpose is to be able to automatically peel off the peeling portion of the coating without relying on human hands,
It is an object of the present invention to provide a stripping method that can improve the productivity of a covered electric wire having a predetermined exposed core wire.

(Summary of the Invention) The present invention involves making circumferential cuts at two locations on the outer sheath wire of the covered electrical wire by sandwiching the insulated electrical wire with two pairs of stripper blades, and then making circumferential cuts at the two locations. By making at least one axial incision in the sheath between the two, and then moving the two pairs of stripper blades making the circumferential incision closer to each other along the insulated wire, the circumferential direction This is a method for stripping an electric wire coating, which comprises tearing off the coating between the cuts from other coatings, and peeling off the coating between the circumferential cuts.

(Example) The present invention will be described below based on an example shown in the drawings. FIG. 1 is a perspective view of the main parts of a stripping device for carrying out the method of the present invention. This stripping device is
Two pairs of stripper blades 2, 2a and 4, 4a are arranged at positions corresponding to both ends of the stripping portion 7a of the covered electric wire 7, and a pair of stripper blades 2, 2a and 4, 4a are arranged at positions outside of these stripper blades so as to be able to grip the covered electric wire 7. Two pairs of wire guides 1, 1a and 5, 5a arranged
Furthermore, a plurality of pairs (only one pair is shown) of clampers 6, 6a arranged outside these wire guides at positions where the covered electric wire 7 can be clamped and fixed, and the two pairs of stripper cutters 2, 2a and 4, 4a.
at least one slitting knife 3, 3 for making an axial cut into the sheath 8 of the covered wire 7 between
It is equipped with a.

Each pair of stripper blades 2, 2a or 4, 4a makes circumferential cuts A, B (see FIG. 2) in the sheath 8 of the insulated wire 7 when it is clamped therebetween. The circumferential cuts A, B usually have a depth that approximately reaches the core line 9.

The wire guides 1, 1a and 5, 5a are
Before making the circumferential cuts A and B, when closing the insulated wire 7 so as to grasp it, the insulated wire 7 is taken out and cut with the stripper blade 2,
2a, 4, 4a and the slitting blades 3, 3a.

The clampers 6, 6a serve to feed the covered wire 7 and to fix the covered wire 7 in a predetermined position during the stripping operation.

Next, an embodiment of the method of the present invention using the stripping device configured as described above will be described with reference to FIGS. 1 to 12.

In the first step, the wire guides 1, 1a and 5, 5a are each closed to grip the covered wire 7 and position it to the axis.
Next, the clampers 6, 6a clamp (fix) the covered wire 7 at a predetermined position. At the same time as the electric wire 7 is clamped, as shown in FIGS. 2 and 3, the two pairs of stripper blades 2, 2a and 4, 4a close to clamp the insulated electric wire 7, and remove the coating 8a of the peeled portion 7a. Make circumferential cuts A and B at both ends (2 locations).

Next, each stripper cutter 2, 2a, 4, 4a
As shown in FIGS. 4 to 6, the sheathing 8 is made at least one place between the circumferential cuts A and B by the at least one slit blade 3, 3a while the insulated wire 7 is still being held between the sheathed wires 7. An axial cut C is made in the. The axial cut C normally has a depth that approximately reaches or penetrates the core line 9, and has both ends connected to the circumferential cut C.
It has a length that almost reaches . Further, in this embodiment, the slitting blades 3, 3a are provided so as to operate by penetrating the grooves of the wire guides 1, 1a and the stripper blades 2, 2a, but they may be provided in other positions. Of course. In addition,
If there are multiple slitting tools 3, 3a, there is no problem because the forces applied to the covered wire 7 will be balanced by operating them at opposing positions, but if there is only one slitting tool, the covered wire 7 will be operated on the opposite side. It is desirable to balance the wire by applying the desired wire holder to the wire.
In addition, when making the linear cut C, the slit cutter 3, 3a may be made with an acute angle at the tip as shown in the figure to make the cut easier, and then drawn linearly to make the cut, or the stripper cutter 2, 2a may be used to make the cut. 4,
A flat blade heat cutter with a flat tip having a length of a predetermined interval between 4a may be used to make a cut so as to press the cut.

Next, as shown in FIGS. 7 to 9, the slitting blades 3 and 3a make a cut C in the covered wire 7, and then each pair of stripper blades 2, 2a and 4, 4a remains in a closed state. Then, they are moved toward each other along the length of the covered wire 7, thereby pressing and clamping the covering 8a of the peeling portion 7a between them. At this time, the outer skin line 8a
are each folded (flexed) as shown in the figure and torn off from the covering 8 except for the peeling portion 7a.
In the example shown in FIGS. 7 and 8, two slit knives 3 and 3a are used, so the peeling portion coating 8a is
However, if one slit knife is used, as shown in FIG.
becomes a single thing.

As described above, in the present invention, the stripper blades 2, 2a and 4, 4a tear off the peeling portion coating 8a, and then the stripper blades 2, 4 and 2a, 4a separate vertically from each other while holding the coating in their mouths, The covering 8a is separated from the core wire 9 to expose the core wire 9. Note that the stripper blades 2, 4 or 2a, 4a facing each other may move in parallel to each other as shown in FIG.
As shown in FIG. 2, they may be combined in a scissor-like manner so that their cutting edges move in an arc relative to each other. For example, a fluid cylinder 10 is used as a power source for performing such circular arc motion. By the way, since the covering 8a that has been folded and peeled off tends to return to its original straight state, it is easy to separate from each stripper blade.

Further, to explain the clampers 6, 6a in more detail, the clampers 6, 6a are connected to the wire guides 1, 1a, 5, 5a, the stripper blades 2, 2.
a, 4, 4a, and the slitting blades 3, 3a move back and forth (up and down) to clamp (grasp) the covered wire 7 by narrowing the interval, and the stripper blade compresses while tearing off the peeling part coating 8a. When inserting the cover, clamp and hold it so that the parts other than the coating to be removed do not move in the axial direction.

The clamper, wire guide, stripper cutter, slit cutter, etc. are set on one slide block and moved up and down at the same time, and the wires are fed by a wire feeder (not shown).

(Effects of the Invention) As explained above, according to the present invention, the stripper blade that makes a circumferential cut in the coating is used as it is to peel off the coating at the peeled part, so the stripping work is done manually. It is easy to automate without any hassle, and it is possible to improve work efficiency.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of a stripping device for carrying out the method of the present invention, FIGS. 2 to 10 are explanatory diagrams showing the operation of FIG. 1, and FIG. An explanatory view showing how a directional cut is made, FIG. 3 is a cross-sectional view taken along the - line in FIG. 2, FIG. 4 is an explanatory view showing how a slit knife makes an axial cut, and FIG. Line sectional view, Figure 6 is an explanatory diagram of the main part of a covered wire that has been cut in the axial direction, Figure 7 is an explanatory diagram showing how the stripper blade tears off the coating at the peeled part, and Figure 8 is FIG. 9 is an explanatory diagram of the main part of the covered wire with the coating of the peeled part completely stripped off, FIG. 10 is a cross-sectional view showing another example of FIG. 8, and FIG. , a front view showing an embodiment of the stripper cutter, 12th
The figure is a front view showing another embodiment of the stripper cutter. 1, 1a... wire guide, 2, 2a... stripper knife, 3, 3a... slit knife, 4,
4a... Stripper cutter, 5, 5a... Wire guide, 6, 6a... Clamper, 7... Covered electric wire, 7a... Stripped portion, 8... Coating, 8a... Stripped portion coating, 9... Core wire, 10...Fluid cylinder,
A, B... Circumferential cut, C... Axial cut.

Claims (1)

[Claims] 1. By holding the insulated wire with two pairs of stripper blades, make circumferential cuts in two places on the sheath of the insulated wire, and then make at least one or more cuts in the sheath between the two circumferential cuts. by making an axial cut, and then bringing the two pairs of stripper blades making the circumferential cut closer to each other along the covered wire,
A method for stripping an electric wire coating, comprising: tearing off the coating between the circumferential cuts from other coatings; and peeling off the coating between the circumferential cuts.