JPS6110432Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an intermediate support portion for vertically installed insulated wires.

Low-voltage main lines installed vertically along the walls and through the floors of high-rise buildings and condominiums are insulated by providing an insulating layer of rubber, plastic, etc. on a high tensile strength conductor, such as an aluminum stranded conductor. Electric wires are often used.

In order to intermediately support such a vertically laid insulated wire for a main line, the insulating layer of the portion of the wire to be supported is locally removed to expose the conductor, and a sleeve fitting is fixed to the exposed conductor, and the exposed conductor portion is is placed in a metal case with an opening at the lower end, a hardening resin such as epoxy resin is injected into the case through the opening, and the sleeve fitting is bitten into the hardening resin body (the above processing is done in a factory); The metal case may be fixed and supported in a wire passage hole on the floor of a high-rise building. (For example, see Utility Model Publication No. 53-40718.) In this vertical support structure for electric wires, the metal case and the curable resin body are firmly connected, and the conductor, which is the tension member of the electric wire, is made of the curable resin body. Since the wire is firmly connected to the wire, the wire can be stably suspended as long as the hardening resin remains in the hardened state.

According to the above electric wire support structure, the protective case body of the electric wire connection portion can be used as a support member for the electric wire, which is advantageous in terms of cost.

However, when the above-mentioned support structure is applied to vertically support insulated wires for main lines in skyscrapers, etc. that require large size and long lengths, the interface between the lower end of the sleeve fitting and the hardening resin body increases due to the increase in the wire's own weight. There is a concern that creep distortion may occur, and in this case, the loss of the support function of the wire is unavoidable, which is extremely dangerous.

The vertical support part for an insulated wire according to the present invention was devised to solve the above-mentioned difficulties, and is a vertical support part for an insulated wire installed on a vertically installed insulated wire on an exposed conductor from which the coating layer is locally removed at the point where the wire should be supported. , a cylindrical insulating spacer having a tapered outer periphery at the lower end thereof is connected to the lower end of the sleeve fitting, and a metal case is provided, the case surrounding the exposed conductor portion; The above insulating spacer is installed so as to lock the tapered outer surface thereof and with the lower end closed, and the case is filled with a curable resin and cured, and the above insulated spacer is placed on the wire supporting floor surface through which the insulated wire is passed. This structure is characterized by supporting the case.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of the vertical support part according to the present invention. In FIG. 1, reference numeral 1 indicates a trunk insulated wire that is laid vertically, and the insulating coating layer 11 at the portions to be supported has been locally removed.
12 is a conductor portion exposed by removing the insulating coating layer 11. Reference numeral 2 denotes a sleeve fitting fixed to the exposed conductor portion 12, for example, a C-shaped sleeve having a groove for inserting the conductor over its entire length is compressed onto the conductor. Reference numeral 3 denotes a heat-resistant cylindrical insulating spacer attached to the exposed conductor portion 12 and connected to the lower end of the sleeve metal fitting 2, and has good heat resistance, causing thermal deformation even at high temperatures of, for example, 90°C. It is made of an insulating material, such as a hard plastic material such as polyester premixes or Bakelite, which is free from heat and has lower thermal conductivity than the sleeve fitting 2. This spacer 3 is split into two pieces, and its outer diameter is larger than the outer diameter of the sleeve metal fitting 2, and a tapered outer surface 31 whose diameter decreases downward is formed on the outer periphery of its lower end. There is.

Reference numeral 32 denotes a groove for inflowing a curable resin, which will be described later, which is recessed in the tapered outer surface 31.

Reference numeral 4 denotes a metal case that surrounds the exposed conductor portion 12, the upper end 41 of which is used as a curable resin injection port, and its inner diameter is such that the curable resin described below can be smoothly filled between the insulating coating layer 11 and the insulating coating layer 11. The inner diameter is set to provide sufficient clearance. On the other hand, the lower end 42
has a tapered shape whose diameter decreases downward to lock the tapered outer surface 31 of the insulating spacer 3, and its tip has an inner diameter equal to or slightly larger than the outer diameter of the insulating coating layer 11. . Furthermore, a locking ring groove 43 is provided on the outer peripheral surface of the metal case 4. The metal case 4 is made of, for example, non-magnetic aluminum alloy casting, and can be either integrated or split into two parts depending on the location where the electric wires are to be supported. This metal case 4 may also be used as a pooling fitting when lifting electric wires.

Reference numeral 5 denotes a hardening resin such as an epoxy resin that is filled and hardened in the metal case 4, and the metal case 4, the exposed conductor 12, the sleeve fitting 2, and the insulating spacer 3 are firmly and integrally connected by the resin body 5. obtain. Reference numeral 6 indicates a bifurcated support fitting fitted into the locking groove 43 of the metal case 4, such as a non-magnetic aluminum alloy casting metal fitting; 7 indicates a floor surface in a multi-story building such as a skyscraper; The metal fitting 6 is supported around the electric wire through hole 71 in the floor surface 7. 8 is a waterproof sealing tape wound between the lower end 42 of the metal case 4 and the insulation coating layer 11; 9 is a waterproof sealing tape wound between the upper end 41 of the metal case 4 and the insulation coating layer 11; Needless to say, the seal tape 8 is applied before the resin filling, and the seal tape 9 is applied after the resin filling is completed.

Although the above embodiments have been described with respect to intermediate support for one insulated wire, the present invention is of course applicable to the case where a plurality of insulated wires, for example three wires, are intermediately supported at once. In this case, as shown in FIGS. 2 and 3, an insulating spacer 30 having a three-part structure is used. In FIGS. 2 and 3, 301 is a divided piece, 302 is a tapered outer surface, 303 is a groove, and 304 is an exposed conductor holding hole. When attaching the insulating spacer 30 to the exposed conductor, the insulating spacer 30 is fixed by wrapping it with tape or the like from its outer periphery.

As described above, in the intermediate support portion of the vertically installed insulated wire according to the present invention, when supporting the vertically installed insulated wire on the floor, the covering layer at the support location is removed to expose the conductor, and this exposed conductor portion is removed. After attaching the sleeve fitting and the insulating spacer to the conductor part, it is surrounded by a metal case, and the tapered outer surface of the spacer is locked with the tapered inner surface provided in the case, and a hardening resin is placed in the case. This is a structure in which a curable resin is filled and hardened, and the curable resin firmly integrates the exposed conductor portion and the metal case via a sleeve fitting, making the insulated wire sufficiently strong. Therefore, even a large-sized and long vertically installed insulated wire that is subject to an excessive weight of the wire can be properly supported in the middle without any trouble.

In addition, in the present invention, since the insulating spacer and the metal case supporting it are in contact with each other at their tapered inner and outer surfaces, the wire supporting force applied to the insulating spacer can be effectively dispersed, and the insulated wire can be It can always be placed on the axis of the metal case and does not require alignment, which has a great practical effect.

In addition, the intermediate support part of the present invention can be pre-processed at a factory, which has the advantage that on-site processing can be omitted, simplifying work and improving quality.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the intermediate support part of a vertically installed insulated wire according to the present invention, FIG. 2 is a front view showing another embodiment of the insulating spacer used in the present invention, and FIG. FIG. 3 is a view taken along the line A--I in FIG. 2; In the figure, 1 is an insulated wire, 11 is an insulating coating layer, 12 is an exposed conductor, 2 is a sleeve metal fitting, 3 is an insulating spacer, 31 is a tapered outer surface, 4 is a metal case, 41 is a tapered inner surface, and 5 is a hardening material Resin, 7 is the floor surface.

Claims (1)

[Scope of utility model registration request] A sleeve fitting is fixed onto the exposed conductor from which the covering layer has been locally removed at the point where the vertically installed insulated wire is to be supported, and a cylindrical insulating spacer with a tapered outer periphery at the lower end is attached to the sleeve fitting. A metal case is attached to the lower end so as to surround the exposed conductor portion and lock the tapered outer surface of the insulating spacer, and the lower end is closed at one end, An intermediate support part for a vertically installed insulated wire, characterized in that the case is supported on a wire support floor surface through which the insulated wire is penetrated, the inside of which is filled with a curable resin and cured.