JPH0640419Y2 - Undercarpet cable protection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a protection structure for an undercarpet cable including a lower protector laid on a concrete floor and an upper protector overlaid on a flat cable.

[Conventional technology]

The under carpet cable was developed as a cable to be routed under a carpet on a concrete floor, and a lower protective body such as a plastic sheet is provided on the concrete floor and a flat cable body is placed on the lower protective body. The floor was covered with an upper protector made of a metal strip material such as a steel strip.

Here, the lower protector serves as a buffer layer that protects the flat cable body from contact with the surface of the concrete floor so that it will not be damaged, while the upper protector protects the sharp objects that pierce the carpet from mechanical damage as a barrier. And is electrically grounded to ensure safety.

By the way, the conventional upper protector is made sufficiently larger than the width of the flat cable body, and both side edges are fixed to the concrete floor with double-sided adhesive tape or the like.

[Problems to be solved by the invention]

The concrete floor contains salt, which evaporates, causing rust on the metal strip in the upper protector exposed on the concrete floor, which causes electrical continuity with the grounding conductor on the flat cable body. It was bad and impaired the role of the upper protective body as a ground layer, and the thickness increased, which adversely affected the flat cable. Further, since the surface of the upper protection body is made of conductive plating, there is a risk of electric shock to the human body if electric current leaks from the flat cable and grounding is incomplete.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a protection structure for an undercarpet cable that is free from the above-mentioned drawbacks of the prior art and is resistant to rust and electrically safer.

[Means for solving problems]

In order to achieve the above-mentioned purpose, the plastic lower protector laid on the concrete floor has a width sufficiently larger than the width of the flat cable body, and one upper protector is larger than the width of the flat cable body and the lower protector. A metal strip having a width less than or equal to the width of the body is used as a base body to cover the front surface with an insulating layer and the back surface with a conductive layer, and adhesive tape is adhered to both side edges of the back surface of the metal strip covered with the conductive layer. The adhesive tape is adhered to the upper surfaces of both side edges of the lower protector to separate the conductive layer on the back surface from the concrete floor by the adhesive tape on both sides and the lower protector.

The insulating layer that covers the front surface can be formed by an electrically insulating coating such as PVC coating, epoxy coating, or enamel, and the conductive layer that covers the back surface is made of epoxy-based or polyester-based coating containing conductive carbon. It can be formed by conductive coating.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 show an example of an upper protective body, and 1 is a metal strip material made of a steel strip, which has a width larger than the width of the flat cable and is not more than the width of the lower protective body described later. Then, the metal strip 1 is provided with the insulating layer 2 by the insulating coating on its surface and the conductive layer 3 by the conductive coating on its back surface,
Further, the upper protective body 5 is configured by providing double-sided adhesive tapes 4 which are continuously adhered in the longitudinal direction on both side edges of the conductive layer 3 on the back surface. In addition, double-sided adhesive tape 4
The surface of is covered with release paper.

FIG. 3 shows an example in which the above-mentioned upper protector 5 is used. On the surface of the concrete floor 9, a lower protective member 8 having a width sufficiently wider than that of the flat cable main body 7 is laid as a plastic tape, the flat cable main body 7 is laid on the upper surface thereof, and the flat cable main body 7 The upper protector 5 is arranged on the upper side, and at that time, the double-sided adhesive tapes 4 on both side edges of the back surface peel off the release paper and are adhered to the upper side edge parts of the lower protector 8, so that both side edge parts of the upper protector 5 are provided. Are fixed to both side edges of the upper surface of the lower protector 8 so as to be sealed.
By fixing the upper surface protective member 5, the conductive layer 3 on the back surface of the upper protective member 5 adheres to the ground layer 6 made of copper tape or the like disposed on the flat cable body 7 so that the metal strip 1 and the ground layer 6 are electrically conductive. It is electrically conductive through the layer 3.

The surface of the back side conductive layer 3 of the upper protective body 5 is sealed with the adhesive tapes 4 and the lower protective body 8 on both sides, and is isolated without being directly exposed to the concrete floor 9.

Although not particularly shown, the upper protector 5 is covered with carpet.

[Function and effect of device]

According to the protection structure of the under carpet cable of the present invention as described above, the lower protection body for protecting the lower side of the flat cable body is sufficiently larger than the width of the cable body, and the upper protection body is provided on the upper surface thereof. Since both side edges are fixed with adhesive tape, both side edges of the upper protective body float up from the concrete floor surface by the thickness of the lower protective body and are covered with the lower surface of the upper protective body or the conductive layer. There is no risk of rust due to salt contained in the concrete floor in the metal strip as the base, and the conductive layer on the back surface is sealed with adhesive tape on both side edges of the upper surface of the lower protective body, Since it can be contacted on the flat cable in a state where it is isolated from the concrete floor by the lower protection body, the conductive layer concerned will be damaged by the surface due to the adherence of salt and floating dust. Hakare electrically conductive to the grounding conductor to the teeth, thus grounding the metal strip serving as base of the upper protective member is ensured.

Furthermore, since the surface is covered with an insulating layer, even if one person touches it, there is no electric shock and it is electrically safer.

And the like, and the intended purpose is sufficiently achieved.

[Brief description of drawings]

The attached drawings show a preferred embodiment of a protector for an undercarpet cable of the present invention. Fig. 1 is a cross-sectional view of an upper protector, Fig. 2 is a rear view of the same, and Fig. 3 is the same. FIG. 6 is a transverse cross-sectional view showing a state in which a flat body is protected by applying a protective body and connecting the lower protective body. In the reference numeral, 1 is a metal strip, 2 is an insulating layer, 3 is a conductive layer, 4 is a double-sided adhesive tape, 5 is an upper protective body, 6 is a ground layer, 7 is a flat cable body, 8 is a lower protective body, and 9 is It is a concrete floor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeaki Yoneyama 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Hitachi Cable Co., Ltd. Hidaka factory (56) References JP-A-60-62811 (JP, A) JP-A-58-157314 (JP, A) Jikkou 49-31419 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A lower protective body made of plastic laid on a concrete floor and an upper protective body covered from above the flat cable, the lower protective body having a width sufficiently larger than the width of the flat cable main body. One of the upper protectors is a metal strip whose width is larger than the width of the flat cable and equal to or less than the width of the lower protector as a base body, the front surface is covered with an insulating layer, the back surface is covered with a conductive layer, and the back surface is covered with the conductive layer. Adhesive adhesive tape on both edges of the back of the metal strip,
A protective structure for an undercarpet cable, characterized in that the adhesive tape is adhered to the upper surfaces of both side edges of the lower protector to separate the conductive layer on the back surface from the concrete floor by the adhesive tape on both sides and the lower protector.