JPH09262305A - Sheet for fire preventive treatment of sections penetrating enclosure and fire preventive treatment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To subject the sections where metallic pipes penetrate the holes of floors (enclosures) to a fire preventive treatment good in fire preventive, waterproof and soundproof properties. SOLUTION: A combination of a fire retardant foamed plastic sheet 13 and a thermally expandable refractory material sheet 15 is used as an internal packing material 17. A sheet 11 for the fire preventive treatment formed by covering this internal packing material with a cover sheet 19 formed by sticking metallic foil and refractory fabric to each other is used. This sheet 11 is wrapped around the metallic pipe 29 and the gap between the outer peripheral surface of the sheet 11 for the fire preventive treatment and the inner peripheral surface of the hole 27 is filled up with mortar 31. The waterproofness of the penetrating section is assured by the cushion property of the fire retardant foamed plastic sheet 13 and the waterproofness of the cover sheet 19. The soundproofness is assured by the cushion property. The volumetric decrease of the fire retardant foamed plastic sheet 13 at the time of heating is made up by the volumetric expansion of the thermally expandable refractory material sheet 15, by which the fire preventiveness is assured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof sheet used for a portion such as a floor or a wall of a building where a metal pipe or the like penetrates a fireproof partition, and a fireproof structure using the sheet. .

[0002]

2. Description of the Related Art A hole that is sufficiently larger than the outer diameter of a metal pipe used as a water supply pipe or a drain pipe (usually a steel pipe or an iron pipe) is formed in a floor or wall of a building. ing. If the floor or wall is a fire compartment,
It is necessary to close the holes around the metal tube to create a fireproof structure.

Conventionally, the following structure is known as a fireproofing structure for such a portion. Mortar is filled between the outer peripheral surface of the metal tube and the inner peripheral surface of the hole to be solidified. Rock wool is filled between the outer peripheral surface of the metal tube and the inner peripheral surface of the hole.

[0004]

However, the conventional fire protection structure has the following problems. The structure of the fireproof,
Water resistance is sufficient, but sound insulation is insufficient. That is, since the metal pipe and the floor or wall are integrated by hardening with mortar, the drainage noise and the water supply noise in the metal pipe are easily transmitted to the floor or wall. In the structure (1), rock wool functions as a fireproof material and a cushioning material, and thus has good fireproofing and soundproofing properties, but rockwool is insufficient in waterproofness because it has water permeability.

In view of the above-mentioned problems, an object of the present invention is to provide a fireproof sheet for a penetrating portion of a fireproof partition, which has good fireproofness, waterproofness, and soundproofness, and a fireproofing structure using the same. To provide.

[0006]

A fireproofing sheet according to the present invention which achieves this object comprises a composite of a flame-retardant foamed plastic sheet and a heat-expandable refractory sheet as an internal filler. The whole is covered with a cover sheet made by laminating a metal foil and a fireproof cloth (Claim 1).

Further, the fireproofing sheet of the present invention is a cover sheet in which a fire-resistant foam sheet whose volume does not decrease even when heated is used as an internal filler, and the entire internal filler is laminated with a metal foil and a fire-resistant cloth. A covered structure can also be adopted (Claim 2).

Further, according to the fireproofing structure of the penetration portion of the fireproof compartment of the present invention, in the portion where the metal pipe penetrates the hole formed in the fireproof compartment, the above-mentioned fireproofing treatment is applied to the outer periphery of the metal pipe. It is characterized in that a sheet is wound (Claim 3).

The reason why the fireproof section penetrating portion can be subjected to fireproof treatment with good fireproofness, waterproofness, and soundproofing with the above-mentioned structure will be described in the following embodiments.

[0010]

Embodiment

[Embodiment 1] FIG. 1 shows an embodiment of a fireproofing sheet according to the present invention. The fireproof sheet 11 has a structure in which a composite of a flame-retardant foamed plastic sheet 13 and a heat-expandable fireproof material sheet 15 is used as an internal filler 17, and the entire internal filler 17 is covered with a cover sheet 19. .
An adhesive 21 is applied to one surface of the cover sheet 19 covering the internal filler 17.

A flame-retardant foamed polyethylene sheet or the like is used as the flame-retardant foamed plastic sheet 13. The flame-retardant foamed plastic sheet 13 has cushioning properties and flexibility. The heat-expandable fire-resistant material sheet 15 foams when heated by the heat of a fire, expands 3 to 50 times, and maintains fire resistance in the expanded state. As such, Danseal D (trade name) manufactured by Furukawa Techno Material Co., Ltd. is commercially available. Since the heat-expandable refractory material sheet 15 has flexibility, an internal filler 17 obtained by combining the heat-expandable refractory material sheet 15 with the heat-expandable fire-resistant material sheet 15 is provided.
Has cushioning properties and flexibility.

The cover sheet 19 is made by laminating a metal foil and a fire resistant cloth with an acrylic adhesive. Aluminum foil or the like is used as the metal foil, and glass fiber woven cloth, carbon fiber woven cloth or carbon fiber non-woven cloth is used as the fire resistant cloth. The cover sheet 19 having such a structure has excellent flexibility, is not easily broken, and has excellent fire resistance and waterproofness. The seams on the periphery of the cover sheet 19 are sewn together with the fire resistant thread 23, and the inner filler 17 is in a state of being confined inside the cover sheet 19.

In this embodiment, the heat-expandable refractory material sheet 15 has a width and thickness smaller than that of the flame-retardant foam plastic sheet 13, and the heat-expandable refractory material sheet 15 is made of flame-retardant foam plastic. The sheet 13 is arranged toward one side edge of the sheet 13 while being offset.

FIG. 2 shows the fireproof sheet 11 as described above.
2 shows a fireproof structure of a penetration portion of a fireproof partition using. FIG.
In the above, 25 is a concrete floor constituting a fireproof partition of a building, 27 is a hole formed in the floor 25, and 29 is a metal pipe for water supply or drainage that is pierced through the hole 27. . In this fireproof structure, the fireproof sheet 11 of FIG. 1 is wound around the outer circumference of the metal tube 29 in the hole 27, and a gap is provided between the outer peripheral surface of the wound fireproof sheet 11 and the inner peripheral surface of the hole 27. Is filled with mortar 31. The fireproofing sheet 11 is wound with the surface on the side of the adhesive 21 inside and the side edge on the side having the heat-expandable fireproof material sheet 15 downward.

When the holes are filled with the mortar 31, the fireproof sheet 11 receives a compressive force in the thickness direction. Since the flame-retardant foamed plastic sheet 13 inside the fireproof sheet 11 has a cushioning property, it repels when compressed and functions to bring the surface of the cover sheet 19 into close contact with the other party. Since the cover sheet 19 itself is waterproof, this ensures the waterproof property. Therefore, the water accumulated on the floor 25 can be prevented from leaking out below the floor 25.

The fireproofing sheet 11 has a function of absorbing vibration because the flame-retardant foamed plastic sheet 13 inside has a cushioning property. As a result, the metal tube 2
The sound of drainage and water supply in 9 is not transmitted to the floor 25, and soundproofness is secured.

When a fire occurs under the floor 25, fireproofness is secured as follows. That is, when the fire-prevention treatment sheet 11 is heated by the heat of a fire, the flame-retardant foamed plastic sheet 13 loses its volume by breaking bubbles when the temperature exceeds a certain level. 15 foams and expands. Therefore, the volume of the inner filler 17 in the cover sheet 19 does not decrease as a whole, but rather the expansion of the heat-expandable refractory material sheet 15 acts to inflate the cover sheet 19.
As a result, the situation when there is a fire is as shown in FIG. That is, the volume expansion of the heat-expandable refractory material sheet 15 compensates for the decrease in the volume of the flame-retardant foamed plastic sheet 13, and the volume of the fire protection sheet 11 as a whole does not decrease. Therefore, there is no gap between the metal tube 29 and the fireproofing sheet 11, between the fireproofing sheets 11 and between the fireproofing sheet 11 and the mortar 31, and the fireproofness is ensured.

As shown in FIG. 2, the fireproof sheet 11 is
The heat-expandable fire-resistant material sheet 15 is wound around with its side edge facing downward so that heat during a fire can be easily transferred to the heat-expandable fire-resistant material sheet 15.

[Second Embodiment] FIG. 4 shows another embodiment of the fireproofing sheet according to the present invention. This fireproofing treatment sheet 11 is different from the fireproofing treatment sheet 11 shown in FIG. 1 in that the width of the heat-expandable fireproof material sheet 15 is made the same as the width of the flame-retardant foamed plastic sheet 13. The other parts are the same as those of the fireproofing sheet of FIG. 1, and therefore, the same parts are designated by the same reference numerals. With such a structure, there is a drawback that the amount of the heat-expandable refractory material sheet 15 used increases, but since the flat flame-retardant foamed plastic sheet 13 can be used, the production is facilitated. This fireproofing treatment sheet 11 can be used in the same manner as the fireproofing treatment sheet of FIG. 1 and exhibits the same effect.

[Third Embodiment] FIG. 5 shows still another embodiment of the present invention. Fire protection sheet 11 used here
Uses a refractory foam sheet 33 whose volume does not decrease even when heated as the internal filler 17.
The entire sheet 7 is covered with a cover sheet 19. A silicone foam or the like can be used as the refractory foam sheet 33 whose volume does not decrease even when heated. The silicone foam has a cushioning property, and when heated, it does not decrease in volume and is made into a ceramic to be a refractory material. The structure of the cover sheet 19 is the same as that of the cover sheet of the first embodiment.

The width of the fireproofing sheet 11 is made larger than the thickness of the floor 25. When the fireproofing sheet 11 is wound around the metal tube 29, the upper side edge of the fireproofing sheet 11 projects from the upper surface of the floor 25. To do so. As shown in FIG. 2, when the upper side edge of the fire prevention sheet 11 is made to be at the same level as the upper surface of the floor 25, the upper side edge of the fire prevention sheet 11 becomes lower than the upper surface of the floor 25 due to a construction error. Water may be accumulated there and the waterproofness may be deteriorated. However, if the side edge on the upper side of the fire protection sheet 11 is projected from the upper surface of the floor 25 as shown in FIG. 5, such a problem may occur. It won't happen.

The fireproof structure shown in FIG. 5 can provide the same fireproofness, waterproofness, and soundproofing as the fireproof structure shown in FIG. Also, when the fireproofing sheet of FIG. 1 is used, it is desirable that its width is made larger than the thickness of the floor so that the upper side edge of the fireproofing sheet projects from the upper surface of the floor.

[0023]

The fireproofing sheet according to the present invention comprises an internal filler and a cover sheet, and the internal filler has cushioning properties and flexibility, and is flame retardant or fire resistant and is heated. However, the volume of the cover sheet does not decrease, and the cover sheet has fireproof and waterproof properties and is resistant to tearing. Therefore, this fireproofing sheet can be easily wrapped around the outer periphery of the metal pipe, and if this fireproofing sheet is wrapped around the outer periphery of the metal pipe and the outer periphery is filled with mortar, the cushioning property of the internal filler is improved. The waterproof property of the cover sheet can ensure the waterproof property of the penetrating portion. Further, the cushioning property of the internal filler can ensure soundproofing. Furthermore, the fire resistance of the cover sheet, the flame retardance or fire resistance of the internal filler, and the volume of the cover sheet that does not decrease even when heated can ensure the fire resistance of the through portion.

[Brief description of drawings]

FIG. 1 shows an embodiment of a sheet for fire protection treatment according to the present invention, (A) is a partially cutaway front view, and (B) is B of (A).
-B line sectional drawing.

FIG. 2 is a sectional view showing an embodiment of a fireproofing structure according to the present invention using the fireproofing sheet of FIG.

FIG. 3 is a cross-sectional view showing a state when the fire protection structure of FIG. 2 is in a fire.

FIG. 4 shows another embodiment of the fireproofing sheet according to the present invention, (A) is a partially cutaway front view, and (B) is a sectional view taken along line BB of (A).

FIG. 5 is a sectional view showing another embodiment of the fire protection structure according to the present invention.

[Explanation of symbols]

 11: Fireproofing sheet 13: Flame-retardant foamed plastic sheet 15: Thermally expandable fireproof sheet 17: Internal filler 19: Cover sheet 21: Adhesive 25: Floor 27: Hole 29: Metal tube 31: Mortar 33: Fire resistant foam sheet

Claims (3)

[Claims] 1. A composite of a flame-retardant foamed plastic sheet (13) and a heat-expandable refractory sheet (15) is used as an internal filler (17), and the entire internal filler (17) is a metal foil. A sheet for fireproof treatment of a penetration portion of a fireproof compartment, characterized by being covered with a cover sheet (19) laminated with a fireproof cloth. 2. A cover sheet in which a fire-resistant foam sheet (33) whose volume does not decrease even when heated is used as an inner filler (17), and the entire inner filler (17) is laminated with a metal foil and a fire-resistant cloth. (19) Covered with (19), a sheet for fireproof treatment of a penetration portion of a fireproof partition. 3. A sheet for fire protection treatment according to claim 1, wherein the metal pipe (29) is provided at the outer periphery of the metal pipe (29) at a portion where the metal pipe (29) penetrates the hole (27) formed in the fire protection compartment. (11) is wrapped around, a fireproof structure for a penetration portion of a fireproof partition.