JPH0321148Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a terminal suspension device for main cables in high-rise buildings.

[Conventional technology and its problems]

In recent years, the construction of high-rise residential buildings has been actively progressing, and as shown in Figure 2, the main cable 30 is pulled up from the main cable introduction part to the top floor, and the main cable 30 is connected to the ceiling of the top floor. The cable 30 is suspended, and branch wires 32 are drawn out from the main cable 30 at each floor.

Here, various types of terminal suspension devices 31 for the trunk cable 30 have been considered, and the present inventors have also proposed the "cable suspension device" shown in Utility Application No. 52-42260 (see Publication No. 58-335). We have devised a "device" and have successfully implemented it so far. However, consumers are demanding a reduction in housing construction costs, and as part of that effort, consideration of electrical wiring is also required.

“Cable retention device” filed by the creators first
As shown in Figure 2, the trunk cable 30 is suspended from the ceiling of the top floor of a high-rise residential building;
0 must also extend to the ceiling of the top floor.

By the way, on the top floor, it is only necessary to wire wires according to the power consumed on that floor, so it is wasteful to extend the trunk cable 30 to the ceiling of the top floor. This is a length of about 2 meters per trunk line, but since the trunk cable 30 is suspended for each line of each house in the height direction, there is a great deal of waste. Furthermore, when the main cable 30 is suspended, it is placed on a ladder or stepladder, which poses a safety problem.

Here, if the trunk cable 30 is suspended at the floor position of the top floor and the branch wire 32 of the top floor is pulled out from there, the trunk cable 30 from the floor to the ceiling can be connected.
0 can be saved, and it also serves as a safety measure for work.

Therefore, based on the above-mentioned purpose, the inventors of the present invention have proposed the following:
A sleeve having a fixing means at the upper part and a conductor insertion hole for the multi-core main cable and a conductor insertion hole for the branch wire at the lower part, and the conductors are inserted into both conductor insertion holes and the respective conductors are crimped. , an insulating base for fixing these sleeves by the fixing means, a suspension member attached to the insulating base, and a protective cover having a recess for storing branch wires on the outside. Although a terminal suspension device characterized by being filled with an insulating compound was proposed, the following new problems were raised.

That is, in this proposal, the branch electric wire is drawn out to the underside of the floor, and it is necessary to pass it between the floor hole and the hanging device and pull it up above the floor.Therefore, a further improvement is desired to improve workability. In addition, if a fire breaks out in a high-rise residential building, the fire will spread rapidly through electric cable distribution shafts and ducts, so it is strongly required that the structure be fireproof and smokeproof. What was desired was something that could be buried and reburied.

[Purpose of invention]

The object of the present invention is to provide a fireproof and smokeproof end suspension device that can satisfy the above requirements.

[Means to achieve the purpose]

In order to achieve the above object, in the end suspension device of this invention, a flange is attached to the upper surface of the floor through-hole, and the upper part is attached to the cup through the receiving part formed on the inner surface of the cup. An FRP board (fiber-reinforced plastic board) fitted with a sleeve having a collector-type branch conductor connection part and a crimp-type main conductor connection part at the bottom is fitted, and a branch electric wire is introduced into the branch conductor connection part from the top surface of the cup. A conductor is inserted and tightened with a nut, and the conductor of the main cable introduced through the bottom of the cup is inserted into the main conductor connection part and crimped. The body is filled, and a time-curing resin composition is injected between the upper and lower parts of the body.

[Effect]

In the fire-resistant and smoke-proof end suspension of this invention constructed as described above, the main cable is suspended by an FRP board via a sleeve, and fire resistance is imparted by the asbestos foam on the upper and lower surfaces of the cup. The time-cured resin placed in the center acts as a smoke barrier while being protected from fire by the asbestos foam, and also supplies power to the customers on the top floor through the distribution line branch extending from the top of the compression sleeve.

〔Example〕

Next, an embodiment of the present invention will be explained along with the accompanying drawings and the construction procedure.

As shown in Figure 1, trunk cable 1 (600V,
250mm ² triplex type polyethylene insulated vinyl sheathed cable) to the top floor, and the sheath and insulator of main cable 1 to sleeve 3.
Strip the stages according to the dimensions of each trunk cable 1.
Cup 4 (outer diameter 150mmφ, inner diameter 144mmφ, depth
Pass it through the lower main line insertion hole 5 of the 300mm structural steel via the bush 5'. At this time, the bottom of the cup 4 is filled with asbestos foam 6 (100 mm thick) in which a through hole H corresponding to the main line insertion hole 5 is formed.

The sleeve 3 has a collet type branch conductor connection part 3a at the upper part and a crimp type main line conductor connection part 3b at the lower part. After inserting and crimping the conductor 7, the upper part of the sleeve 3 is
The branch conductor 1 is inserted into the FRP board 8 (thickness 20 mm) and the insulation at the end of the branch wire 20 is removed from the top surface of the cup 4 and introduced into the branch conductor connection portion 3c.
2 and screw together nut 11.
1, the branch conductor 12 is attached to the connection part 3a.
At the same time, the sleeve 3 is fixed to the FRP board 8.

Next, the cup 4 is slid back on the main cable 1 and fitted into the floor through hole 21, and the upper end flange 22 is locked and fixed on the floor surface, compressing the main conductor 7 and the branch line conductor 12. Connected sleeve 3
A hook (not shown) is screwed into the screw hole 15 at the center of the FRP board 8 to which the
The FRP board 8 is placed on the receiving part 16 in the cup 4 so as to be suspended.

Next, a hook (not shown) screwed onto the FRP board 8 is pulled out, and a time-curing resin composition 17 (LCR) is injected into the cup 4, leaving an upper part to be filled with asbestos foam 18. At this time, LCR flows into the lower part of the FRP board 8 through the screw hole 15.

Next, the upper asbestos foam 18 (thickness: 100 mm) provided with the branch wire passage hole 19 is fitted onto the upper part of the cup 4, thereby completing the fireproof and smokeproof end suspension of this invention.

Since the asbestos foams 6 and 18 are easily chipped, the outer surfaces can be protected by attaching glass fiber cloth or fire-resistant organic fiber cloth to the outer surfaces using a fire-resistant adhesive.

[Efficacy confirmation test]

The terminal hanging device A of the above embodiment was constructed into a chamber 23 (45 cm x 45 cm x 45 cm) as shown in Fig. 3, and the internal pressure was set to 400 mmAq, and the pressure drop after 60 minutes was 380
It was mmAq.

In addition, after exposing the bottom of the cup to a flame of 1050℃ for 3 hours using a burner conforming to IEEE std634, we dismantled it and observed the inside, and found that the part directly exposed to the flame had turned to ash, but the LCR17 smoke additives),
No abnormality was observed in any component such as FRP board 8.

〔effect〕

As explained above, according to this invention, the end of the trunk cable is suspended in the floor through hole on the top floor, which saves the trunk cable from reaching the ceiling.
There is no need to pull up the branch wires that are drawn out under the floor through the side of the hanging device and above the floor as in the terminal hanging device of No. 175345, and the branch wires can be drawn out straight onto the floor. In addition, asbestos foam is placed on the upper and lower surfaces of the cup, and LCR is injected between them, so the LCR fills the gaps in the hanging device and provides an airtight structure, that is, smoke resistance. The asbestos foam protects the LCR from fire and makes it fireproof.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the fireproof and smoke-proof hanging device according to the present invention, Fig. 2 is an explanatory diagram of electrical wiring in a high-rise residential building,
FIG. 3 is an explanatory diagram of the airtightness test. 1... Trunk cable, 3... Sleeve, 3a...
...Branch conductor connection part, 3b...Main conductor connection part, 4
... Cup, 6 ... Asbestos foam, 7 ... Main conductor, 8 ... FRP board, 12 ... Branch conductor, 16 ...
... Receiving part, 17... Time-curing resin composition (LCR),
18... Asbestos foam, 19... Branch line through hole, 20
... Branch electric wire, 21 ... Floor through hole, 22 ... Flange.

Claims (1)

[Scope of utility model registration request] A sleeve that has a collet type branch conductor connection part on the upper part and a crimp type main line conductor connection part on the lower part through a receiving part formed on the inner surface of the cup which is fitted with a flange on the upper surface of the floor through hole. The conductor of the branch electric wire introduced from the top surface of the cup is inserted into the branch conductor connection part and tightened with a nut, and the main conductor connection part has an FRP plate that passes through the bottom of the cup. The conductor of the trunk cable introduced in the installation is inserted and crimped.
A fire- and smoke-proof end suspension device, characterized in that the upper and lower parts of the cup are filled with asbestos foam, and a time-hardening resin composition is injected between the upper and lower parts.