JPS6110433Y2 - - 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 installed insulated wire for main lines, the insulating layer of the part 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 is The part is placed in a metal case with an opening at the bottom end, and a hardening resin such as epoxy resin is injected into the case through the above opening, and the sleeve fitting is bitten into the hardening resin body (the above processing is done in a factory). In some cases, the metal case is 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 electric wire support structure, the metal case and the curable resin body are firmly connected, and the conductor that becomes the tension member of the electric wire is connected to the curable resin body. Since the wires are firmly connected, the electric wire can be stably suspended as long as the hardening resin is maintained in a 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 intermediate support part of the vertically installed insulated wire according to the present invention was devised to solve the above-mentioned difficulties, and is an exposed conductor in which the coating layer is locally removed at the point where the vertically installed insulated wire should be supported. A cylindrical insulating spacer that fixes the sleeve fitting and has heat resistance is provided on the top, and is connected to the lower end of the sleeve fitting, and a metal case surrounds the exposed conductor portion and the insulating spacer The case is mounted so as to support it, and the bottom end is closed at one end, and the inside of the case is filled with hardening resin and hardened.
This structure is characterized in that the above-mentioned case is supported on a wire support floor surface through which insulated wires are passed.

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

FIG. 1 is a longitudinal sectional view showing an embodiment of an intermediate support portion of a vertically installed insulated wire 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 metal fitting fixed to the exposed conductor portion 12, for example, a C-shaped sleeve having conductor insertion grooves along 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 and does not cause thermal deformation even at a high temperature of, for example, 90°C. It is made of an insulating material that has no heat conductivity and has lower thermal conductivity than the sleeve metal fitting 2, such as a hard plastic material such as polyester premix or Bakelite. This spacer 3 is split into two parts, and its outer diameter is preferably larger than the outer diameter of the sleeve metal fitting 2, and the inner surface of its lower end is provided with the end of the insulating coating layer 11 located at a lower position. A hole 31 for gripping 11a is provided. When the spacer 3 is attached to the exposed conductor portion 12 and the end 11a of the insulating coating layer, the spacer 3 is fixed by wrapping the outer periphery with tape or tightening with a suitable fastener.

4 is a metal case that surrounds the exposed conductor portion 12 and supports the lower end of the spacer 3; the upper end 41 is used as a curable resin inlet; The inner diameter is designed to create a sufficient gap to allow smooth filling. On the other hand, the lower end 42 has an inner diameter that is 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. 44 is a flat bottom formed near the lower end of the metal case 4, and supports the lower end of the spacer 3. 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 wires are to be supported. This metal case 4 may also be used as a pooling fitting when lifting electric wires.

5 is a hardening resin such as an epoxy resin filled and hardened in the metal case 4, and the resin body 5 allows
Metal case 4, exposed conductor 12, sleeve metal fitting 2
and the insulating spacer 3 can be firmly and integrally connected. 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.

FIG. 2 shows another embodiment of the intermediate support part of the present invention,
The embodiment shown in FIG. 1 is a metal case 4 using a support fitting 6.
The metal case 4 is supported by engaging the support fitting 6 with a ring groove 43 provided on the outer peripheral surface of the case 4, whereas in the embodiment shown in FIG. 2, the metal case 4 is supported without providing a ring groove. The flat bottom portion 44 is supported by a support fitting 60 provided with a radial projection 601 and a vertical projection 602.

In the above embodiments, explanations have been given regarding the intermediate support of a single insulated wire, but 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.

As described above, in the intermediate support part 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 a sleeve fitting and an insulating spacer are attached to the conductor part, it is surrounded by a metal case, the lower end of the insulating spacer is supported by the case, and a curable resin is filled in the case and hardened. The exposed conductor part and the metal case are firmly integrated using a sleeve metal fitting made of synthetic resin, so the insulated wire can be supported firmly and stably, making it suitable for large-sized and long vertical installations where excessive wire weight is applied. Even insulated wires can be well supported in the middle without any problems.

In addition, in the intermediate support part shown in the embodiment of the present invention, a hole for gripping the end of the insulation coating layer is formed on the inner surface of the lower end of the insulation spacer, so that a sufficient insulation distance between the exposed conductor and the metal case is ensured. There is no risk of short circuit.

Furthermore, 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 portion of a vertically installed insulated wire according to the present invention, and FIG. 2 is a longitudinal sectional view showing another embodiment of the intermediate support portion of the present invention. 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, 4 is a metal case, 44 is a flat bottom,
5 is a curable resin, and 7 is a 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 heat-resistant cylindrical insulating spacer is connected to the lower end of the sleeve fitting. and a metal case is attached such that the case surrounds the exposed conductor portion and supports the insulating spacer, and the lower end is closed at one end,
An intermediate support portion for a vertically laid insulated wire, characterized in that the case is filled with a curable resin and cured, and the case is supported on a wire support floor surface through which the insulated wire is passed.