JPS608501Y2 - Vertical support for wires - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement in vertical supports for electric wires.

As a support part for vertically suspending and supporting a power distribution main line indoors in a building, an apartment building, etc., a support part having a fireproof structure as shown in FIG. 4 is known.

This support part is assembled as follows.

First, insert the lower refractory material 2' into the metal case 1' from the upper end of the case, and insert the electric wire W'' into the through hole of the lower refractory material 2'.
is inserted, and the sleeve 3' is compressed around the conductor C' of the electric wire W'', so that the lower end 31' of the sleeve can be locked to the lower refractory material 2'.

After that, the cylindrical refractory material 6' and the upper refractory material 4 are loaded into the metal case 1' from the upper end of the case, and then,
A hanging handle M7' is screwed onto the upper end of the case, and the hanging handle of the lid 7' is suspended and supported from a ceiling or the like.

In this way, in the vertical support section for electric wires shown in FIG. 4, it is necessary to screw the lid 7' with a hanging handle onto the upper end of the metal case 1', which requires a complicated structure. There are disadvantages such as the risk of loosening.

Moreover, the entire hanging load M' of the electric wire is borne only by the lower refractory material 2', and a large shear load acts on the refractory material 2', for example, a ceramic plate, and the shear strength of the ceramic plate is too large. Therefore, there is also the disadvantage that the support part lacks long-term stability.

The vertical support part for electric wires according to the present invention was devised in order to solve the above-mentioned difficulties, and it is provided with at least one side surface of a two-piece refractory plate having a wire through hole and a funnel injection hole. The part is locked to the tapered part in the metal case whose lower end is tapered, and the vertically installed electric wire is introduced into the metal case through the fireproof plate, and the conductor of the lead-in wire is inserted into the metal case. The fixed conductor sleeve is locked to the fireproof plate at its lower end surface, and the metal case is filled with a hardening compound that integrates the case, the lead-in wire, and the split fireproof plate. , the structure is characterized in that the case is supported via a support fitting in an electric wire through hole in the floor of the building.

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

In FIG. 1, 1 is a metal case, and a groove 11 is provided on the outer surface.

This metal case 1 is also used as a pulling eye.

2 is a weather-resistant plate, and a ceramic plate can be used.

This fireproof plate 2 is split into two parts and has a wire insertion hole 21 and a compound injection hole 22.

W is a vertically laid main wire, W' is a branch wire, and both wires W and W' are inserted into the wire insertion holes 21 of the fireproof plate 2.

Reference numeral 3 denotes a conductor compression sleeve for binding the exposed conductors of the electric wires W and W', and the lower surface 31 of the sleeve is secured to the fireproof plate 2 for hanging the electric wires.

After the electric wires W and W' are connected by the conductor sleeve 3, the two-split fireproof plate 2 is joined to the electric wires W and W', and these are housed in the metal case 1, and the two-split fireproof plate 2 is attached to the metal case 1. It is locked to the tapered inner surface of the lower end of the case 1.

In this case, at least a portion (in the illustrated case, a majority portion) of the side surface of the fireproof plate 2 is engaged with the tapered inner surface of the case 1 .

4.4 is a hardening compound, which is loaded after fixing the above-mentioned fireproof board.

The work up to this compound loading is done in the factory.

Reference numeral 5 denotes a floor surface of a building, 51 an electric wire through hole provided in the floor surface 5, and 6 a supporting metal fitting split into two parts.The metal case 1 is supported on the floor surface 5 via the supporting metal fitting 6.

FIG. 2 shows another embodiment of the present invention, in which the embodiment of FIG. 1 is used for supporting the uppermost end of the wire, whereas the embodiment of FIG. 2 is used for supporting the middle of the wire.

In FIG. 2, W is a main wire that can pass through the metal case 1, and W' is a branch wire.The conductors of these wires are connected by a conductor branch sleeve 30, and the lower end surface 31 of the sleeve 30 is made of a fireproof plate. It is locked to 2.

FIG. 3 shows another embodiment of the present invention, in which a main wire W is stripped to expose a conductor C, and a conductor sleeve 300 (C-shaped sleeve) is compressed and bonded to the exposed conductor C. The lower end surface 31 of this sleeve 300 is locked to the fireproof plate 2.

In FIGS. 2 and 3, parts having the same reference numerals as those in FIG. 1 indicate the same components as in FIG. 1.

The vertical support part of the electric wire according to the present invention has the structure as described above, in which the fireproof plate that locks the lower end surface of the conductor sleeve compressed and connected to the electric wire conductor is split into two, and the lower end of the metal case is formed into a tapered shape. After squeezing, the electric wire with the conductor sleeve fixed to it is introduced into the metal case from its bottom end, then the two-split fireproof plate is delivered into the case from the bottom end, and then,
By inserting a fingertip into the case from the lower end of the case, the two-split fireproof plate can be held together with the lead-in electric wire and can be locked to the tapered portion inside the two-split fireproof plate case.

Therefore, even if the fireproof plate has a two-piece structure, it can be locked to the case without using a connecting device such as a binding wire, so a bag-like one without a lid can be used, which is advantageous for sealing the case.
A supporting portion with stable electrical characteristics and simple structure can be obtained.

In addition, the support part of the present invention has a structure in which the metal case is filled with a hardening compound and the case, the sleeve-fixed lead-in wire, and the bifurcated fireproof plate are integrated, so that the wire can be hung easily. The load can be carried by both the refractory plate and the hardening compound, and therefore the shear load acting on the refractory plate, such as the ceramic plate, can be reduced, and even if the shear strength of the ceramic is not very high, the long-term mechanical Stability can be well guaranteed.

Moreover, the compound injection hole is provided in the fireproof plate, and the hardening compound is filled into the metal case through the injection hole, so even if the metal case is a bag-like metal case without a lid, the compound can be poured into the case without any gaps. Can be completely filled without leaving any residue.

Therefore, the exposed conductor part of the wire (including the conductor compression sleeve)
can be maintained in a completely airtight state with good watertightness, and there is no problem of water, humidity, etc. entering the exposed conductor portion from the outside.

Incidentally, since the conventional example shown in Figure 4 is composed only of solid materials of metal and ceramics, it is impossible to completely seal the contact interface between them, and moisture does not enter the exposed conductor part. Infiltration can be prevented, but moisture can also easily infiltrate, especially when wires are being transported and hoisted and installed.

Of course, even if the compound softens and spills out in the event of a fire, the fireproof board can reliably support the wires for a specified period of time (the period during which the wires must be kept alive until a fire alarm is issued), providing good fire protection. It is.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the vertical support part for an electric wire according to the present invention, FIGS. 2 and 3 are explanatory diagrams showing another embodiment of the vertical support part for an electric wire according to the present invention, and FIG. The figure is an explanatory view showing a conventional vertical support section for electric wires. In the figure, W is a vertically installed electric wire, 1 is a metal case, 2 is a fireproof plate, 3 is a conductor sleeve, 31 is a lower end surface of the sleeve,
4 is a compound, and is a supporting metal fitting. 5 is the floor surface,

Claims (1)

[Scope of utility model registration request] At least a part of the side surface of a two-piece fireproof plate having an electric wire through hole and a compound injection hole is locked to the tapered part in the metal case whose lower end is tapered, and the fireproof plate is A vertically installed electric wire is introduced into the metal case by penetrating the plate, and a conductor sleeve fixed to the conductor of the lead-in wire is locked to the fireproof plate at its lower end surface. It is filled with a hardening compound that integrates the case, the above-mentioned lead-in electric wire, and the bifurcated fireproof plate.
A vertical support part for electric wires, characterized in that the case is supported in an electric wire through hole on the floor of a building via a support fitting.