JPS6147042B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable sheath tearing method for tearing a cable sheath.

When connecting various cables, it is necessary to peel off the sheath at the cable end. In this case, prior to peeling off the sheath, it is necessary to tear the sheath in the longitudinal direction to make it easier to peel off.

Conventionally, a knife or the like was used to cut the sheath of a cable such as a cab tire cable, and the sheath was stabbed into the sheath and pulled toward the front.However, the sheath was made of chloroprene rubber and was hard and Because of its high elasticity, even if the blade were to bite into the sheath, the high elasticity would act to pinch the blade from both sides, making it extremely difficult to cut into pieces.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for tearing a cable sheath, which makes it possible to tear the sheath relatively easily by reducing the elastic force of the sheath that acts to tighten the blade.

Hereinafter, specific examples of the present invention will be explained in detail with reference to FIGS. 1 and 2. The drawings show an example of a flat cable as the cable whose sheath is to be cut. The flat cable 1 has three cable cores housed in parallel in a flat cable sheath 2. The cable sheath 2 is made of chloroprene rubber or the like. In each cable core 3, a rubber insulation coating 3b is provided around the outer periphery of the cable conductor 3a, and insulation is achieved between the cable cores.
In order to cut the sheath 2 of such a flat cable 1, a push cutter 4 is used in this embodiment. This press-cutting machine 4 has a plurality of disk-shaped slitters 5, each of which has press rollers 6 disposed on both sides as a pressing means, each of which is rotatably supported on a common shaft 7, and whose upper part is covered with a frame 8. It has a structure. The diameter of each slitter 5 is the diameter of the presser roller 6.
The difference in diameter is one of the factors that determines the depth of cut. Each presser roller 6 is made of a material harder than the cable sheath 2 (for example, cemented carbide steel). Note that 9 is a liner.

In carrying out the cable sheath cutting method of the present invention, the push cutter 4 is pressed against the surface of the cable sheath 2 in the longitudinal direction while rolling in the longitudinal direction. When the push cutter 4 is pressed against the surface of the cable sheath 2, both sides of the cable sheath 2 to be cut by the slitter 5 are pressed by the press rollers 6 and are forcibly recessed. At this time, the surface of the cable sheath 2 around the recessed portions is pulled toward each recessed portion. Therefore, a tensile force is applied to the sheath surface portion that the slitter 5 contacts from both sides in a direction perpendicular to the tearing direction. When the blade of the slitter 5 penetrates into such a state, the cable sheath 2 exerts only a slight elastic force that pinches the blade of the slitter 5 from both sides, and the sheath 2 is relatively easily pulled along the longitudinal direction. It can be torn apart.

Once one long-diameter surface of the sheath 2 is torn in this manner, the opposite long-diameter surface is similarly torn, and then the sheath 2 is stripped off.

Note that the push-cutting machines 4 are arranged on both sides of the sheath 2 in the long-diameter direction, and the two are connected with bolts, etc., and by tightening the bolts, the sheath 2 is pressed from both sides with both push-cut machines 4, and the sheath 2 is pushed in the long-diameter direction of the sheath 2. It is also possible to cut through both surfaces at the same time.

Furthermore, if the cable sheath is relatively thin, only one surface of the sheath may be cut.

Furthermore, the slitter 5 can also be rotated by a driving source.

The cutting thickness of the sheath 2 can be changed by changing the diameter of the slitter 5 or the presser roller 6.

The slitter 5 may be of a non-rotating type.

Of course, the present invention can be applied not only to tearing the sheath of a flat cable, but also to tearing the sheath of a normal round cable.

The means for pressing the long-diameter surface of the cable sheath is not limited to rollers, and may be one that simply slides without rotating.

As explained above, the method for tearing a cable sheath according to the present invention involves pressing and indenting both sides of the portion of the cable sheath surface to be cut, so that the portion of the cable sheath to be cut is directed outward from the direction crossing the cutting direction. Since a pulling force is applied to the sheath, the elastic force of the sheath that pinches the sheath from both sides is reduced, making it easier to tear the sheath than in the past.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the state in which the method of the present invention is carried out, and FIG. 2 is an explanatory diagram showing the state of the force acting on the cable sheath when the method of the present invention is carried out. 1... Cable, 2... Cable sheath, 3...
... cable core, 5 ... slitter, 6 ... presser roller as pressing means.

Claims (1)

[Claims] 1. By pressing both sides of the part of the cable sheath surface to be cut with a pressing means and indenting the cable sheath surface, a tensile force is applied to the part of the cable sheath to be cut outward from a direction intersecting the tearing direction. A cable sheath tearing method characterized by cutting the cable sheath with a blade while acting.