JPH11341649A - Member and method for fireproof treatment for flammable long object penetrating in fireproof partition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finish a fireproof treatment for the part of a fireproof partition through which a flammable long object penetrates in a short time, and eliminate a protruding part from the fireproof partition. SOLUTION: A fireproof treatment member 11 composed of a cylindrical unit 12 which is made of plastic, has a flange 14 on its one end and is divided into two, and a heat-expandable fire-resistant material sheet 13 applied to the inner surface of the cylindrical unit 12 is employed. Two fireproof treatment members 11 are inserted into the hole 2 of a fireproof partition through which a flammable long object 5 penetrates from both the ends of the hole 2 so as to surround the flammable long object 5 and positioned with an interval between their inner ends. If a fire occurs on one side of the fireproof partition 1 and the flames spread along the cable 5, the heat-expandable fire-resistant material- sheet 13 is expanded to close the hole 2 and the spread of fire is blocked at that position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire protection member at a portion where a combustible long object such as an electric wire or a cable penetrates a fire protection compartment such as a wall or a floor of a building, and a fire protection method using the same. It is about.

[0002]

2. Description of the Related Art In the case where a combustible long object is wired and piped through a fire protection compartment in a building, the spread of the fire due to the spread of the combustible long object is prevented when a fire occurs. Therefore, it is necessary to make the portion where the combustible long object penetrates the fire protection compartment into a fire prevention structure.

FIG. 6 shows a typical fire prevention treatment method which has been put to practical use. In this fire prevention method, a metal pipe 3 (an electric wire pipe) is passed through a hole 2 formed in a fire protection compartment 1 and fixed with a mortar 4, and then a cable 5 is passed through the metal pipe 3. A heat-resistant sealing material 6 is wound around 5, and a holding metal fitting 7 is attached to the outer periphery thereof.

[0004]

However, the conventional fire protection method has the following problems. It takes time and effort to seal around the metal tube with a mortar, wind a heat-resistant sealing material, attach a holding metal fitting, and the like, which increases the construction time. Since the metal tube and the retainer have good thermal conductivity, make the metal tube longer and protrude sufficiently from the fire prevention compartment so that the heat conduction by the metal tube and the retainer does not cause burnout on the non-fire side. (A section is provided), so that not only the protruding portion gets in the way, but also the construction location is restricted.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fire protection member in which a portion of a combustible long object that penetrates a fire protection compartment can be easily and quickly performed, and has little projection from the fire protection compartment. And to provide a fire prevention method using the same.

[0006]

A fire protection member according to the present invention is made of a material (such as plastic or paper) which softens or burns down due to the heat of a fire, and has a flammable long object penetrating therethrough. It is characterized by comprising a tubular body that can be inserted into a hole of the body so as to surround the combustible long object, and a thermally expandable refractory sheet attached to the tubular body.

The fire prevention member according to the present invention preferably has a configuration in which a tubular body is divided into two and a heat-expandable refractory sheet is attached to the inner surface of each. Further, the fire prevention treatment member according to the present invention preferably has a configuration in which a flange portion having an outer diameter larger than the inner diameter of the hole of the fire protection compartment is formed at one end of the two-part cylinder. Further, it is preferable that the fire prevention member according to the present invention has a configuration in which an elastic claw piece for retaining is formed on the outer peripheral surface of the two-part cylindrical body. Further, it is preferable that the fire prevention treatment member according to the present invention has a configuration in which a holding piece for holding the heat-expandable refractory material sheet is formed on the inner surface side of the split tubular body.

Further, according to the fire protection method of the present invention, two fire protection members having a total length shorter than the length of the hole of the fire protection compartment are prepared, and the two fire protection members are flammable long members. Characterized in that it is inserted from both ends into the hole of the fire protection compartment through which the object penetrates so as to surround the flammable long object, and two fire protection members are arranged at an interval between their inner ends. It is.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. [Embodiment 1] FIG. 1 shows an embodiment of a fire prevention member according to the present invention. The fire prevention member 11 includes a two-part cylinder 12 made of a plastic (for example, polyethylene, acrylonitrile, butadiene, styrene resin, etc.) softened by the heat of a fire, and a heat-expandable fire-resistant material attached to the inner surface of the cylinder 12. And a material sheet 13. A flange portion 14 is formed at one end of the split cylinder 12. An elastic claw piece 15 is formed on the outer peripheral surface of the split cylindrical body 12 so as to rise obliquely outward toward the flange portion 14 side.

FIGS. 2 (a) to 2 (e) show in detail one member of the split fire protection member 11 (the other member has exactly the same structure). At both ends in the axial direction of the split surface of the split cylindrical body 12, a positioning recess 16 is formed on one side.
However, a positioning projection 17 is formed on the other side. In addition, a coupling projection 18 is formed on one side and a coupling recess 19 is formed on the other side at an intermediate portion of the split surface of the cylindrical body 12 in the axial direction.
The connecting projection 18 has a hook-like shape with the tip facing outward (FIG. 2).
(See (b) and (c)). Inside the coupling recess 19, a step is formed in which the hook of the coupling projection 18 of the other party is hooked.

At one end of the inner surface of the split cylinder 12,
A rib that determines the axial position of the heat-expandable refractory sheet 13
20 are formed. The height of the rib 20 is substantially the same as the thickness of the thermally expandable refractory sheet 13. A pressing piece 21 is provided at an intermediate portion in the circumferential direction of the rib 20 so as to be folded toward the other end of the cylindrical body 12. The pressing piece 21 presses the heat-expandable refractory sheet 13 against the inner surface of the tubular body 12 to stabilize its position. It is preferable that the pressing piece 21 has a form as shown in FIG. 3 in order to enhance the effect of pressing the thermally expandable refractory sheet 13. That is, the holding piece 21
Is preferably formed so that the distance from the inner surface of the cylindrical body 12 becomes narrower toward the tip, and a triangular projection 22 and a knurl 23 are formed at the tip. The triangular projections 22 facilitate the insertion of the heat-expandable refractory material sheet 13 at the tip-side inclined surface, and cut into the heat-expandable refractory material sheet 13 to prevent the heat-expandable refractory material sheet 13 from moving. Note that since the split cylinder 12 is manufactured by an injection molding method, a holding piece is attached to the cylinder 12.
A hole 21a for forming 21 is provided.

As the heat-expandable refractory sheet 13, a rubber-like thin plate obtained by kneading a heat-expandable material such as heat-expandable graphite, pearlite or sodium silicate, an inorganic fiber and a binder (rubber or thermoplastic elastomer) can be used. it can. When heated, the heat-expandable refractory material sheet rapidly expands in volume like a snake ball, which is a kind of fireworks, to form a good fire-resistant heat-insulating layer. In particular, a heat-expandable refractory sheet in which thin heat-expandable graphite flakes and inorganic fibers are oriented in a direction parallel to the sheet surface to form a layer is a preferable material. The components of the heat-expandable refractory sheet are about 10 to 20% by weight of heat-expandable graphite, 40 to 70% by weight of inorganic fibers, and about 5 to 20% by weight of an organic binder, a filler and others. The refractory material sheet using this heat-expandable graphite is obtained by orienting the heat-expandable graphite in the same direction as the sheet surface by the action of the inorganic fibers that are oriented by extrusion, roller pressing, or the like during production.

Since the heat-expandable graphite is oriented in the same direction as the sheet surface, the heat-expandable refractory material sheet has a very large coefficient of thermal expansion in the thickness direction (10 times or more). Therefore, the thickness is small, and the heat capacity is small, so that heat is quickly transmitted to the inside and expands quickly. Also, after expansion, it changes into an insulated product rich in heat insulation, so that it has very high heat insulation.

Next, a fire prevention method using the above fire prevention member 11 will be described with reference to FIGS. In order to perform a fire protection process on a portion where the cable 5 penetrates the hole 2 of the fire protection compartment 1, first, two fire protection members 11 as described above are prepared for each location. The length of the fire protection member 11 is 2
The total length is set to be shorter than the length of the hole 2 of the fire protection compartment 1 (thickness of the fire protection compartment 1). The outer diameter of the cylinder 12 is slightly smaller than the inner diameter of the hole 2 of the fire protection compartment 1. The outer diameter of the flange portion 14 is set to be larger than the inner diameter of the hole 2.

Since the fire prevention member 11 is divided into two parts, the cable member 5 having already been laid is divided into two parts.
And are joined so as to surround. The joining method is such that the split surfaces of the two members are opposed to each other, and the positioning protrusion 17
(See FIG. 2) only need to be pressed against each other so as to fit into the positioning recess 16 of the other member. Then, the connecting protrusion 18 enters the connecting recess 19, and the hook of the connecting protrusion 18 is hooked on the step in the connecting recess 19, so that the two members are connected and cannot be separated. This joining operation is performed on both sides of the fire protection compartment 1.

Thereafter, the cylindrical body 12 is inserted into the hole 2 of the fire protection compartment 1 from both ends. Insertion is performed until the flange portion 14 comes into contact with the wall surface of the fire protection compartment 1. Then, the two fire prevention treatment members 11 inserted from both ends are arranged with a space between the inner ends. When the cylinder 12 is inserted into the hole 2, the elastic claw piece
15 is elastically deformed and pressed against the inner surface of the hole 2. For this reason, it becomes difficult for the fire prevention member 11 to be pulled out of the hole 2. In addition, rattling of the fire prevention treatment member 11 can be prevented. This is the end of the fire prevention processing. Therefore, the work for the fire prevention treatment is very simple and can be performed in a short time.

Next, a description will be given of the fire prevention function of the place where the above fire prevention processing is performed. Now, for example, fire protection compartment 1
Assuming that a fire has occurred on the right side of the cable and the cable 5 has spread, first, the heat-expandable refractory material sheet of the fire protection member 11 on the right
13 expands when exposed to the flame, blocking smoke and flame.
After expansion, it changes into an insulated product rich in heat insulation and exhibits high heat insulation. At the same time, a plastic cylinder 12
Is softened by heat and pressed against the inner surface of the hole 2 by the expansion pressure of the heat-expandable refractory sheet 13. Or cylindrical body 12
Are burned off by heat, and the expanded thermal expandable refractory sheet 13 reaches the inner surface of the hole 2. For this reason, the gap between the cylindrical body 12 and the inner surface of the hole 2 is also closed, and it is possible to prevent smoke from entering through the gap.

If the heat-expandable refractory sheet 13 on the right side is fully expanded and still high heat or hot air is transmitted through the conductors of the cable 5 and enters the hole 2, the heat is applied to the fire-resistant treatment member 11 on the left side. The heat-expandable refractory material sheet 13 expands and closes the gap inside the cylindrical body 12. As a result, the space in the hole 2 is shut off from the outside, so that an oxygen-deficient state is reached and the spread of the cable 5 is stopped. At the same time, smoke penetration is also blocked. Thereafter, when heat is further transmitted, the cylindrical body 12 is softened and pressed against the inner surface of the hole 2 by the expansion pressure of the heat-expandable refractory sheet 13. For this reason, the gap between the cylindrical body 12 and the inner surface of the hole 2 is also closed, and the effect of preventing fire spread is more reliable.

When a fire occurs on one side of the fire protection compartment 1, the spread of the cable 5 is stopped in the hole 2 of the fire protection compartment 1 by the above-described process.
Can be prevented from spreading to the opposite side of the According to the fire prevention treatment tool and the fire prevention treatment method, since the gap between the fire prevention treatment tool and the inner surface of the hole is closed at the time of the fire as described above, it is not necessary to seal the gap with mortar or the like. . Therefore, there is an advantage that the fire prevention treatment can be easily performed in a short time. Further, in this fire prevention treatment method, the fact that heat is not easily transmitted because the cylindrical body 12 is made of plastic also greatly contributes to the spread of fire and the cutoff of smoke. In addition, a space is provided between the inner ends of the two fire prevention members 11, and the fact that heat is not directly transmitted to the other through the fire prevention member 11 also contributes to the prevention of fire spread.

[Other Embodiments] The flange portion 14 has a function of ensuring the positioning of the fire prevention treatment member 11 and preventing the leakage of smoke to the non-fire side. Is also good. Even if it is omitted, the fire spread prevention function is not significantly impaired. The holding piece 21 may be formed so as to extend in the circumferential direction from the edge of the split surface instead of the end of the cylindrical body 12. The heat-expandable refractory sheet 13 can be attached to the inner surface of the cylindrical body 12 with an adhesive or a double-sided adhesive tape. In that case, the holding piece 21 can be omitted. The elastic claw pieces 15 are very convenient for preventing the fire prevention treatment member 11 from coming off and preventing rattling, but may be omitted if, for example, the flange portion 14 is fixed to the wall surface of the fire prevention section 11 with an adhesive. It is possible.

[0021]

As described above, according to the present invention, the fire protection can be performed simply by inserting the fire protection member into the hole of the fire protection compartment, so that the fire protection work can be performed very easily and in a short time. it can. Further, since there is almost no portion protruding outside the hole of the fire prevention compartment, there is no portion that becomes an obstacle after construction, and there is an advantage that the construction location is not restricted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a fire prevention treatment member according to the present invention.

FIG. 2 shows a half member of the fire prevention treatment member of FIG. 1,
(A) is a plan view, (b) is a front view, (c) is a rear view,
(D) is a side view, and (e) is a cross-sectional view taken along line ee in (a).

FIG. 3 is a sectional view showing a preferred embodiment of a holding piece in the fire prevention treatment member of FIG. 1;

FIG. 4 is a partially cutaway perspective view showing one embodiment of a fire prevention method of the present invention using the fire prevention member of FIG. 1;

FIG. 5 is a sectional view of the same.

FIG. 6 is a cross-sectional view showing an example of a conventional fire prevention treatment method.

[Explanation of symbols]

 1: Fire protection compartment 2: Hole 11: Fire prevention treatment member 12: Cylindrical body 13: Thermal expansion resistant refractory material sheet 14: Flange 15: Elastic claw piece

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norihiro Hamasaki 5-18-8 Higashi-Hachiman, Hiratsuka-shi, Kanagawa Prefecture Inside Furukawa Techno Material Co., Ltd. (72) Inventor Seiki Takeda 7-10-7 Akasaka, Minato-ku, Tokyo Super Communications Inc.

Claims (3)

[Claims] 1. A flammable long object is made of a material which is softened or burned off by the heat of a fire, and is inserted into a hole (2) of a fireproof compartment (1) through which a flammable long object (5) penetrates. (5) A tubular body (12) that can be inserted around the tubular body (12), and a heat-expandable refractory sheet (13) attached to the tubular body (12). Of fire prevention treatment. 2. A flange (1) having an outer diameter larger than the inner diameter of the hole (2) of the fire protection compartment (1) at one end of the cylinder (12).
The fire protection member according to claim 1, wherein 4) is formed. 3. The fire protection member according to claim 1, wherein the total length is shorter than the length of the hole of the fire protection compartment.
The two combustible treatment members (11) are inserted into the holes (2) of the fireproof compartment through which the combustible long objects (5) penetrate. A method for treating fire in a flammable long object through-hole, wherein the method is carried out so as to surround and insert two fire-treating members (11) at an interval between their inner ends.