JPS63283417A - Cable protective cover - Google Patents

Abstract

PURPOSE:To obtain a cable protection cover which is not easily damaged by arranging a hard cutting metal line in the longitudinal direction of a tubular body. CONSTITUTION:Metal wirings 6, 10, such as piano wirings, stainless steel wirings are buried longitudinally of a protection cover like a pipeline conduit 1 or a trough made of upper and lower coves 4, 5. The diameter of the wire is varied according to the thickness of the cover, and normally approx. 0.1-1.0mm to perform its object. The narrower the interval between the wirings is, the better it is, but in view of the weight, 3-10mm are preferable. Further, the wirings may be buried in multilayers of two or more layers with respect to the thickness of the cover, and the depth is set to 0.5mm or more from the surface up to 1/2 of the thickness of the plate. Thus, since the wirings 2, 6 are buried in the longitudinal direction of the cover, cables 3 7 can be protected against intentional damage to cut the cables 3, 7 contained in the cover.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cable protection cover that is not easily destroyed.

[Prior art] When cables are laid underground, in tunnels, or along railroads or roads, steel or synthetic resin protective covers made of tubular bodies such as conduits and troughs are used to protect the cables. ing.

[Problems to be solved by the invention] Conventional steel protective covers are heavy, difficult to work in high places or in narrow spaces, and have poor durability due to corrosion and electrolytic corrosion. . On the other hand, as a way to compensate for these shortcomings, FR
A cover made of P (fiber-reinforced synthetic resin) is used, but since FRP can be easily cut with a hacksaw, it is vulnerable to deliberate attempts to destroy the cover, and communication cables such as those for internal telegraph and telephone equipment may be damaged. It has the disadvantage that it can be easily cut.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems. This provides a cable protection cover.

The cable protection cover made of a tubular body made of fiber-reinforced synthetic resin in the present invention may be a vibrator-shaped conduit as shown in FIG. It may also be a trough. In the case of a trough, the upper and lower lids are tightened using a metal belt or the like that cannot be easily cut. As shown in FIG. 3, the cable rack 9 and the channel-shaped trough 8 may be fastened together with a metal belt.

As long as the cable rack 9 is in contact with the wall surface, metal wires are not required for this rack.

Metal wires such as piano wire or stainless steel wire (2 in Figure 1, 6 in Figure 2, 1 in Figure 3) are placed in the longitudinal direction of such a protective cover.
By embedding the protective cover 0), it is possible to prevent the protective cover from being easily destroyed even if an attempt is made to destroy it intentionally. The diameter of the metal wire varies depending on the thickness of the protective cover, etc., but is usually 0.1-1. Omm is enough to achieve the purpose. The narrower the distance between the metal wires, the better, but considering that the weight does not increase, the distance between the metal wires should be approximately 3
An interval of about 10 mrr is preferable. As shown in FIGS. 1 and 2, the metal wires may be arranged in one layer with respect to the thickness of the protective cover, or may be arranged and buried in multiple layers of two or more. The depth of embedding the metal wire in the protective cover is approximately 0.5 from the surface.
It is sufficient if the thickness is not less than mm and is up to the thickness of the plate.

The method for manufacturing the FRP protective cover containing metal wires of the present invention involves using continuous fibers such as glass roving or matte fibers as reinforcing fibers, impregnating them with a matrix such as vinyl ester resin or unsaturated ester resin, and then It can be manufactured by drawing out from a mold having a cross-sectional shape, so-called pultrusion molding. The metal wires can be introduced into the mold and pulled out in the same way as continuous fibers such as glass roving, and the metal wires can be buried at required intervals in the longitudinal direction (pulling direction) inside the protective cover. In addition to pultrusion molding, when producing an FRP pipe by filament wind molding, metal wires can be wound around a mandrel in the same way as continuous fibers such as glass roving, and the protective cover can also be embedded in a spiral shape in the longitudinal direction.

In addition to the above-mentioned pultrusion molding, continuous press molding can also be used for the trough-shaped protective cover. This molding method introduces a synthetic resin material containing continuous reinforcing fibers into a press mold and presses it to form the trough lid (upper lid and lower lid).
is formed, then the press mold is opened, the lid is pulled out, and at the same time the molding material connected to the lid is introduced into the press mold, the mold is closed again, and the pressing is repeated. By introducing the metal wires in the same manner as the continuous reinforcing fibers, the metal wires can be buried at required intervals in the longitudinal direction (extraction direction) within the protective cover.

FRP materials include thermosetting resins such as vinyl ester resins, unsaturated polyester resins, epoxy resins, and phenol resins, thermoplastic resins such as polyamide resins, and polyolefin resins, glass fibers, carbon fibers, aramid fibers,
It is reinforced with various ceramic fibers, etc., and the reinforcing fibers can be in the form of continuous fibers in the form of glass rovings, fibers woven in a cross-shape, glass chopped strands, or fibers woven into mats. These are things that I have collected.

The material of the metal wire may be magnetic or non-magnetic if the cable is an optical fiber (non-magnetic is preferable if it is a power or communication cable that uses electricity as a medium. Examples of magnetic metal include piano wire, steel wire). Examples of the non-magnetic metal include stainless steel wire, titanium wire, etc.

[Effects of the Invention] Since the cable protection cover of the present invention has metal wires buried in the longitudinal direction of the cover, even if an attempt is made to intentionally destroy the cover in order to cut the cable housed inside the cover, the cable protection cover will not be destroyed. It is useful to protect cables from deliberate sabotage, as they are difficult to destroy and take a long time to destroy.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view perpendicular to the longitudinal direction of the cable protection cover in the form of a vibrator. FIG. 2 is a schematic cross-sectional view perpendicular to the longitudinal direction of the cover, showing a trough-shaped cable protection cover. Figure 3 shows a channel-shaped cable protection cover;
A schematic sectional view perpendicular to the longitudinal direction of the cover. 2.6. 10... Metal wire 3, 7. 11... Cable i1 diagram leaf 3 diagram

Claims (1)

[Scope of Claims] 1. A cable protection cover made of a fiber-reinforced synthetic resin tubular body in which difficult-to-cut metal wires are arranged in the longitudinal direction of the tubular body.