JPH1139956A - Mouse-proof cable having projected part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mouse-proof cable having projected parts which is provided with excellent mouse-proofing performance and which does not cause any effect on human being. SOLUTION: In a mouse-proof cable 10 comprising a cable 12 and a mouse- proof layer 14 coating on the outer circumference of the cable 12, a contact preventing layer 18 comprising a large number of projected straps to prevent the mouse-proof layer 14 from direct contact a finger and skin of a human being is formed on the outer circumference of the mouse-proof layer 14. Consequently, dermatitis probably caused by direct contact of a finger or the skin of a human being to the mouse-proof layer 14 can be prevented and since the mouse-proof layer 14 is exposed between neighboring projected straps, a mouse- proof cable provided with an effect of preventing troubles by mice together with an effect of preventing direct contact to the skin can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rat-proof cable in which the outer periphery of the cable is covered with a rat-proof layer, and more particularly to a rat-proof cable with projections provided with a contact-preventive measure so that the bare hands and skin of an operator do not come into contact. Things.

[0002]

2. Description of the Related Art Conventionally, in a rat-proof cable in which a cable core is provided with a rat-proof measure, a first sheath for insulating and protecting the cable core is extrusion-coated on the cable core, and a second sheath as a rat-proof layer is formed. Has a double structure.

[0003] The second sheath is made of a rat-proof layer containing a rat-proof agent having excellent properties for preventing rat damage, and plays a role of protecting the surface of the first sheath.

[0004]

However, in the conventional rat-proof cable, since the material component (rat-control agent) of the rat-proof layer is effective for preventing rat harm, it is harmful to humans even if touched directly. It turned out that there is.

More specifically, if a worker touches the rat-proof cable with his or her bare hands when wiring or laying the rat-proof cable, symptoms such as dermatitis may occur. The more sensitive the skin is, the more likely it is to have itchy skin, rough skin, and other symptoms, and many of these symptoms have been reported.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rat-proof cable with projections which solves the above-mentioned drawbacks of the prior art, eliminates the influence on humans, and has excellent rat-proof performance.

[0007]

According to a first aspect of the present invention, there is provided a rodent-proof cable in which the outer periphery of the cable is covered with a rod-proof layer. It is provided with a contact prevention layer composed of a number of ridges and the like that is partially exposed to prevent direct contact with the bare hands and skin of the worker.

According to a second aspect of the present invention, the contact-preventing layer is made of a material that does not contain a rat-proofing agent, and is formed by forming a large number of protrusions having a convex cross section in a straight line or spiral shape along the axial direction. It is.

According to a third aspect of the present invention, the projections are formed at a height and at an interval such that they do not touch the rat-proof layer even if the worker directly grasps them.

[0010] That is, the gist of the present invention is that a rod-shaped cable having a structure in which the outer periphery of the cable is covered with a sheath containing a preservative is provided with a protrusion having a convex cross-section made of a material containing no rodent. (Contact prevention layer).

[0011] According to the above configuration, even when a human (operator) lays or lays a cable, even if the rat-proof cable is grasped with bare hands, the contact prevention layer does not directly touch the rat-proof layer on the cable surface. Therefore, the effect on the skin of humans (workers), that is, dermatitis can be eliminated.

On the other hand, in the groove (below the protrusion) which cannot be directly touched by a human (worker), the original rat-proof layer containing the rat-proof agent is exposed. The cable can have both a rat harm prevention effect and a contact prevention effect.

[0013]

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a rat-proof cable with a protrusion according to the present invention, and FIG. 2 is a partial cross-sectional view of the rat-proof cable with a protrusion of FIG.

As shown in FIG.
0 denotes a large number of protrusions 18t having a convex cross section on the outer periphery of the rat-proof cable 10 in which the cable core 12 is provided with a rat-proof measure.
This is covered with a contact prevention layer 18 made of.

The rat-proof cable 10 has a first cable core 12 for insulating and protecting the cable core 12.
The sheath 14 has a double structure in which the sheath 14 is extrusion-coated, and the first sheath 14 is covered with a second sheath 16 as a rat-proof layer.

The second sheath 16 is made of a rat-proof layer having excellent properties for preventing rat damage, and plays a role of protecting the surface of the first sheath 14.

The contact-preventing layer 18 is provided on the outer periphery of the rat-proof cable 10 at appropriate intervals so that a protrusion 18t having a convex cross section partially exposes the second sheath (rat-proof layer) 16. The protrusions 18t are formed linearly along the axial direction of the rat-proof cable 10, as shown in FIG.

The projecting body 18t has a height h so that the worker does not touch the exposed second sheath (rat proof layer) 16 even when the worker directly grips the rat proof cable 10 when laying and laying the cable. They are formed at intervals d.

The contact preventing layer 18 is formed of a material that does not contain a rodent-proofing agent and that does not affect the human body even when it comes into direct contact.

Next, the operation will be described.

When laying or laying the rat-proof cable with projections shown in FIG.
Even if the user grips with his bare hand, the height h and the distance d of the projection 18t prevent the human skin from contacting the second sheath (rat proof layer) 16. Thus, the contact prevention layer 18
Prevents the bare hands and skin of the worker from directly touching the rat-proof layer on the cable surface, so that the effect on the worker's skin, ie, dermatitis, does not occur. Thereby, the handleability of the rat-proof cable can be improved.

In addition, in the groove (below the protrusion) which cannot be directly touched by the worker, the original rat-proof layer containing the rat-proof agent is exposed, so that the rat-proof property is not impaired. This allows
The rat-proof cable 20 with projections can have both a rat harm prevention effect and a worker's contact prevention effect.

Further, when the cable is drawn, the contact preventing layer 18
Because of the large number of protrusions 18t, the coefficient of friction of the cable surface is reduced, so that the cable is easily pulled in and workability is improved.

Next, a modification of this embodiment is shown in FIG.

As shown in FIG. 3, a contact preventing layer 22 according to a modification is formed by a protrusion 22 forming the contact preventing layer 22.
t is formed in a spiral shape along the axial direction of the rat-proof cable 10.

As described above, the protrusions 22 of the contact prevention layer 22
When t is formed in a spiral shape, the rat-proof cable with projections is more functionally superior in flexibility and cable graspability than a linearly formed projection.

In the present embodiment, the contact preventing layer 18 is formed of a projection 18t having a rectangular (convex) cross section, but the projection 18t has a trapezoidal, semicircular, and It may be formed in a triangle or the like.

Further, the projection 1 constituting the contact preventing layer 18
8t can of course be variously modified without departing from the gist of the present invention of preventing the bare hands and skin of the worker from directly touching the rat-proof layer on the cable surface.
For example, it may be formed in a mesh shape or a lumpy shape.

[0030]

In summary, according to the present invention, when laying or laying a cable, an operator can extend the wire without directly touching the rat-proof layer, and furthermore, the protrusion reduces the friction coefficient of the cable surface. Therefore, pulling in at the time of wire drawing becomes easy.

Further, according to the present invention, since the worker does not need to directly touch the rat-proof layer, cable wiring can be performed with peace of mind, and excellent rat-proof property which is gentle to humans and effective for rats is provided. Thus, the practical value of the present invention is great.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a rat-proof cable with projections according to the present invention.

FIG. 2 is a partial sectional view of FIG.

FIG. 3 is a partial sectional view showing a modification of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rat-proof cable 12 Cable core 14 1st sheath 16 2nd sheath (rat-proof layer) 18 Contact prevention layer 20 Rat-proof cable with projection

Claims (3)

[Claims] 1. A rat-proof cable in which the outer periphery of the cable is covered with a rat-proof layer, wherein a part of the rat-proof layer is exposed to the outer periphery of the rat-proof layer to prevent the bare hands and skin of the worker from directly touching. A rat-proof cable with projections provided with a contact prevention layer comprising a large number of ridges and the like. 2. The contact-preventing layer is made of a material that does not contain a rat-proofing agent, and is formed by forming a large number of protrusions having a convex cross section in a straight line or spiral shape along the axial direction. Rat-proof cable with protrusion. 3. The rat-proof cable with protrusions according to claim 2, wherein the protrusions are formed at a height and at a distance so as to prevent the worker from touching the rat-proof layer even when grasped by bare hands.