JPH0511422Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a penetrating structure for wiring or piping cables, insulated pipes, etc., through partition walls, floors, etc. installed in buildings. .

(Prior Art) Large buildings are required to have partition walls. When wiring or piping cable B etc. through this partition wall, floor, or normal wall (hereinafter referred to as fire protection compartment A), the metal sleeve C fixed through the fire protection compartment A is installed in the same compartment. The Building Law stipulates that cables, insulated pipes, etc. must be routed or piped within the sleeve C so that they protrude at least 1 m from both outside surfaces of section A.

However, when explaining the cable penetration structure, in reality, there are various other wiring and ducts on or under the floor surrounded by fire protection compartment A, or inside the hollow fire protection compartment wall, so metal sleeves are used. C
It is extremely difficult to project more than 1 m from both sides of the outside of the fire protection compartment A.

Therefore, penetrating structures such as cables have been developed that have sufficient fire resistance even if the protruding length of the metal sleeve is short. As an example, a penetrating structure as shown in FIG. 4 is often used.

As shown in Figure 5a, this is inserted into a metal sleeve C that is penetrated through the fireproof compartment A and fixed with mortar K so as to protrude from both outer surfaces of the fireproof compartment A such as a partition wall or floor. Wire cable B, wrap a thin band-shaped heat insulating sealant (putty) E around the outer circumference of cable B until it has approximately the same diameter as bushing F, as shown in Figure 5b, and then wrap it around the outer circumference of cable B, as shown in Figure 5c. Wrap a wide band-shaped heat insulating sealant (putty) G over the bushing F and putty E as shown in FIG. H is tightened and fixed with bolt J, and the protruding putties E and G are shaped with fingers.

(Problems to be solved by the invention) However, the through-wiring structure of this cable had the following problems.

Since the putties E and G are soft and difficult to maintain their shape as they are, it is necessary to attach a presser metal fitting H to the outside thereof, which increases the number of parts, increases the cost, and has poor workability.

Moreover, the work of wrapping the putty G requires relatively skill, and the protruding putties E and G must be shaped by hand, which requires even more skill and poor workability.

Furthermore, since the putties E and G must be wrapped around both the bushing F and the cable B, a large amount of the relatively expensive putty materials E and G is required, which further increases costs.

(Purpose of the invention) The purpose of the invention is to provide an inexpensive penetrating structure for cables, etc. in fireproof compartments that is easy to construct, has good workability, has excellent heat insulation and fire prevention effects even if the protruding length of the metal sleeve is short, and is inexpensive. It's about doing.

(Means for Solving the Problems) The penetrating structure for cables, etc. in the fire protection compartment of the present invention is as shown in Figure 1a, in which cables B and heat insulating pipes pass through the fire protection compartment A such as a partition wall or floor. In a cable penetration structure in a fire protection compartment where M is wired or piped, a metal sleeve C is fixed through the fire protection compartment A so as to protrude from the fire protection compartment A, and the cable B or heat insulating pipe is inserted into the sleeve C. A cover 2 is formed by inserting the metal sleeve C from the outer periphery D of the protruding part of the metal sleeve C to the cable B, the heat insulating pipe M, etc. using flame-resistant foam 1.
It is characterized by being coated with.

(Function) The penetrating structure of the cable B of the present invention in the fireproof compartment A is constructed as shown in FIG.

First, as shown in Fig. 2a, a metal sleeve C is penetrated in advance into the part of the building's fireproof compartment A where cables B and heat insulating pipes M (Fig. 6) are to be passed, and the sleeve C is inserted into It is fixed to the fireproof compartment A with mortar K, etc., and the cable B, heat-insulating pipe M, etc. are inserted inside the sleeve C.

Next, as shown in FIG. 2b, a two-part cover 2 made of flame-resistant foam 1 is placed over the outer periphery D of the protruding portion of the metal sleeve C over the cable B, heat insulating pipe M, and the like.

Furthermore, as shown in FIG. 2c, a tape-shaped clip 3 is wrapped around the outer periphery of the cover 2, and the two-part cover 2 is fixed as shown in FIG. 2d, and also fixed to the metal sleeve C. do.

In the penetrating structure for the cable B etc. in the fire protection compartment A constructed as described above, in the event of a fire, the insulating effect of the flame-resistant foam, which is the material of the cover 2, will prevent the penetrating member from burning. In addition, the area where cables and piping materials may fall off or become deformed due to heat is filled to prevent the spread of fire.
In this case, especially if heat-foamable flame-resistant foam is used as the material for the cover 2, the heat-foamable flame-resistant foam 1 will foam as shown in Figure 1b due to heat radiation from a fire. It fills the gaps between the cables B and the heat insulating pipes M, and forms a foamable heat insulating layer 4 to maintain heat insulation and flame resistance effects.

(Embodiment) FIGS. 1 to 3 are explanatory diagrams of an embodiment of the cable through-wiring structure in the fireproof compartment of the present invention.

In these figures, 1 is a heat-foamable flame-resistant foam, and 2 is a cover formed by molding the heat-foamable flame-resistant foam 1. This cover 2 is a sleeve covering part 2a that covers the outer periphery D of a protruding part of a metal sleeve C that is penetrated and fixed to a fire protection compartment A of a building.
and a cable sheathing portion 2b that covers the cable B protruding from the sleeve C. The inner diameter of the sleeve covering portion 2a is set to a size that allows the bushing F attached to the end surface of the sleeve C to be wrapped from the outside. Further, the length of the sleeve covering portion a is set so as to cover the entire length of the outer periphery D of the protruding portion of the metal sleeve C.

The cover 2 shown in FIG. 3 is not completely divided into two parts like the cover 2 shown in FIG. At times, the notch 5 is opened laterally as shown by the imaginary line in the same figure so that it can be worn. Furthermore, the cover 2 shown in FIG. 3 has a glass cloth layer 5 provided on the outside of the heat-foamable flame-resistant foam 1 to improve the strength of the cover 2.

the foaming state of the heat-foamable flame-resistant foam 1;
That is, the density and hardness of the foam 1 may be appropriately set depending on the use of the cover 2, the required amount of deformation, the clamping force of the clamping tool 3, which will be described later, and the like. This flame-resistant foam (manufactured by Furukawa Electric Co., Ltd.)
SEF1900 (flame-retardant silicone foam) or heat-foamable flame-resistant foam 1 foams when heated to form a foamable heat-insulating layer 4, as shown in Figure 1b, and when heated further. If this continues, the previously formed heat insulating layer will peel off and the next heat insulating layer will be formed, and this operation will be repeated to maintain the heat insulating effect for a long time. Examples of the heat-foamable flame-resistant foam 1 include Fuomox (product name: Bayer AG, West Germany) and Firestop (product name: Dow Corning Company, USA).
and so on.

Reference numeral 3 shown in FIGS. 1 and 2 is a band-shaped clip that is wrapped around the outer periphery of the cover 2. As shown in FIG. In this embodiment, a band-shaped clip 3 with shapeability (ability to maintain a given shape), such as aluminum tape, is used, but any material that does not deform due to heat may be used. It may have the same structure, shape, and material.

1 to 3 show examples in which the cable B is wired inside the metal sleeve C, while FIGS. 6 and 7 show an example in which a heat insulating pipe M is inserted into the metal sleeve C,
This is an example of piping.

In Figures 6 and 7, P is a refrigerant pipe such as a copper pipe, Q is a heat insulating material such as foamed polyethylene,
R is an electric wire, 2 is a cover molded from a heat-foamable flame-resistant foam 1, and 3 is a tape-shaped clip wrapped around the outer periphery of the cover 2.

(Effects of the invention) The penetrating structure for cables and the like in the fireproof compartment of the invention has the following effects.

In addition to the conventional metal sleeve C and bushing F, only two parts, the cover 2 and the clamping tool 3, are required, so the structure is simple and inexpensive, and the workability during construction is also good.

In addition, since the cover 2 is made of a flame-resistant foam, preferably a heat-foamable flame-resistant foam 1, when the cover 2 is heated due to a fire or the like, it will foam and form a foamable heat insulating layer. 4 is formed, so it has an excellent heat insulating effect. Moreover, as the heating continues, the first heat insulating layer peels off and the next heat insulating layer is formed, so the heat insulating effect can be maintained for a long time.

Even if the cable A or the heat insulating pipe M installed in the penetrating structure of the present invention is repaired or changed, it can be handled by removing the clamping tool 3 and the cover 2. It is economical because it can be re-constructed using 2.

There is no need for a metal holding device as in the conventional case, and the cover 2 is lightweight, so it is easy to carry and handle, and has good workability.

[Brief explanation of the drawing]

Fig. 1 shows an example of the penetrating structure of the present invention, in which Fig. 1a is a vertical cross-sectional view during normal times, Fig. 2b is a vertical cross-sectional view during a fire outbreak, Fig. 2 a to d are construction explanatory diagrams of the penetrating structure,
Fig. 3 is a usage explanatory diagram showing another example of the cover used in the same penetrating structure, Fig. 4 is a longitudinal cross-sectional view of a conventional penetrating structure, and Figs. 5 a to d are construction explanatory diagrams of a conventional penetrating structure. , FIG. 6 is a longitudinal cross-sectional view showing another example of the penetrating structure of the present invention, and FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6. 1 is a flame-resistant foam, 2 is a cover, 3 is a clamping tool,
A is the fireproof compartment, B is the cable, C is the metal sleeve, D is the outer periphery of the protrusion of the metal sleeve, F is the bushing, and M is the insulation pipe.

Claims (1)

[Scope of utility model registration request] In a penetrating structure for a cable or the like in a fireproof compartment where a cable B or the like is routed or piped through a fireproof compartment A such as a partition wall or floor, the metal sleeve C is arranged so as to protrude from the fireproof compartment A. Cable B, etc. is inserted into the same sleeve C, and the outer periphery D of the protruding part of this sleeve C is fixed.
From cable B etc., flame resistant foam 1
A penetrating structure for cables, etc. in a fireproof compartment, characterized by being covered with a cover 2 formed by molding.