JP2583388B2 - Fire protection structure at the penetration of a long object in a fire protection compartment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The fire protection structure for a long object penetrating portion in a fire protection compartment according to the present invention is constructed in a penetration portion in which a long object such as a cable or a pipe penetrates a fire protection compartment such as a floor or a wall. Things.

[0002]

2. Description of the Related Art In a building such as a factory or a building, when a through hole is opened in a fire protection section such as a floor or a wall and a long object such as a cable or a pipe is made to penetrate, a gap between the through hole and the long object. Fire protection measures must be taken, such as by backfilling with a refractory material.

FIG. 6 shows a typical example of such a fire prevention structure. In this case, a non-combustible fiber D such as rock wool is filled in a gap in a through hole B of a fire protection compartment (wall) A through which a long object C penetrates, and a fire resistant material such as a calcium silicate plate is provided on both surfaces of the through hole B. A plate E is attached, and a gap between the fire-resistant plate E and the long object C is filled with a heat-resistant sealing material F. This fire protection structure is highly evaluated as having a fire resistance of two hours.

[0004] This fire-prevention measure structure is a long object C other than the above.
For example, it is also adopted when a flexible conduit made of synthetic resin in which an electric wire is routed inside, a heat-insulating material-coated metal tube in which a heat insulating material is coated on the outside of a metal tube, and the like are to be penetrated into the fire protection compartment A. .

[0005]

However, the fire protection structure shown in FIG. 6 has the following problems. a. Since the fireproof plate E must be attached to the fireproof compartment A and the noncombustible fibers D must be packed, the construction is troublesome and the cost is high. In addition, it was not preferable in terms of work environment, such as the worker inhaling the scattered incombustible fibers D during construction. b. When the long object C is a flexible conduit made of synthetic resin, an extra space is provided in the flexible conduit for adding wires, and in the case of a spare flexible conduit, the interior is completely Or a cavity. In addition, in the conventional fire protection structure, these spaces and cavities are kept as they are when a fire occurs, so that they become a flame path, and there is a drawback that the fire prevention measures at the corner are hardly useful. Moreover, since the synthetic resin flexible conduit itself and the outer sheath of the electric wire are made of a material such as flammable polyethylene or polyvinyl chloride, the flame in the flexible conduit is fast and spreads in a short time. Sometimes it happened.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive fire protection structure which is easy to construct, has a sufficient fire protection effect, and is inexpensive.

[0007]

FIG. 1 is a perspective view showing the structure of a fire prevention measure for a long object penetrating portion in a fire prevention compartment according to the present invention.
As shown in the figure, a long object C in a fire protection compartment, in which a long object C such as a cable or a pipe is passed through a through hole B formed in a fire protection compartment A such as a floor or a wall, is divided in a circumferential direction. Fixing having a possible cylindrical portion 10 at both ends, and connecting the cylindrical portions 10 by connecting portions 5 provided at intervals in the axial direction, and forming a through hole 2 between the connecting portions 5. Tool 1
To the elongated object C such that the through hole 2 is located in the through hole B.
Of the same long object C with a cylindrical portion 10
A heat-foamable flameproof material 3 is disposed between the heat-resistant material 4 and the long object C, the refractory material 4 is buried from the through hole B to the inside of the through hole 2, and the through hole B is closed with the refractory material 4 and the through hole is closed. The gap between the long object C and the through hole B is closed at the portion 2.

[0008]

According to the fire prevention structure of the long object penetrating portion in the fire protection compartment according to the present invention, as shown in FIGS. 1 and 2, the through hole B is closed by the refilled refractory material 4 and this refilled. Since the refractory material 4 enters the inside of the through hole 2 and the gap between the long object C and the through hole B is closed at the portion of the through hole 2, the type of the long object and the shape of the through hole are different. Also refilled refractory material 4
Accordingly, the gap between the long object C and the through hole B can be simply and reliably closed. As a result, in the fire prevention structure of the present invention, the first
In addition, since the long object C is in close contact with the refractory material 4 at the center of the through hole B and is fixed in an airtight manner,
That is, before the thermally foamable flame-resistant material 3 foams, the passage of smoke and flame from the minute gap between the long object C and the thermally foamable flame-resistant material 3 can be blocked. Further, the long object C is hardly burnt due to the close contact with the refractory material 4, and the long object C takes a considerable time until the thermally foamable flame-resistant material 3 exhibits a sufficient effect.
Can delay the spread of fire. Secondly, even in a normal state other than a fire, the above-mentioned airtightness can prevent the infiltration of rainwater or the like or the invasion of pests or the like to the dwelling side when piping is performed from outside the dwelling to penetrate the outer wall. . Third,
Since the thermally foamable flameproof material 3, the fixture 1, and the long object C are integrally fixed by the backfilled refractory material 4 that has penetrated through the through hole 2, the thermally foamable flameproof material due to an earthquake or other vibration. 3
Alternatively, there is no possibility that the fixing tool 1 falls off easily and the fire prevention function is impaired.

Further, in the fire prevention measure structure of the present invention, the opening 2
The long object C is supported by the refractory material filled between the long object C and the through hole B through the hole, so that the entire load of the long object C is directly applied to the thermally foamable flameproof material 3. Is prevented. As a result, it is possible to prevent a gap from being formed between the upper portion of the long object C and the thermally foamable flame-resistant material 3, and it is possible to avoid a decrease in fire prevention performance.

Furthermore, the refractory material 4 filled in the through hole B
Is in direct contact with the long object C, and when the long object C burns, its heat is transmitted to the refractory material 4 and escapes, thereby suppressing the temperature rise of the long object C. Moreover, since the fixing tool 1 has a structure in which the cylindrical portions 10 at both ends are connected by the connecting portion 5, heat transfer from one end to the other end is suppressed. Therefore, according to the fire prevention measure structure of the present invention, fire prevention performance can be improved.

Further, in the fire protection structure of the present invention, since the refractory material 4 is filled up to the long object C, smoke and water flow to the opposite side of the fire protection compartment A along the outer surface of the long object C. Can be prevented. Therefore, according to the fire protection structure of the present invention, a smoke prevention function and a water stop function can be obtained.

In addition, since the fire protection device used in the fire protection structure of the present invention is provided with the opening 2, the fireproof material 4 is used when the fire protection structure of the present invention is constructed. From the inside of the fixture 1, and the construction of the fire prevention structure can be easily performed.

[0013]

1 to 3 show an embodiment of a fire protection structure for a long object penetrating portion in a fire protection compartment according to the present invention.

A shown in these figures is a fire protection compartment such as a wall,
B is a through hole opened in the partition A, and C is a long object such as a cable, a pipe, a synthetic resin flexible electric conduit inserted into the through hole B.

Reference numeral 1 shown in FIGS. 1 to 3 denotes a split fixing tool which is put on the outside of the long object C. This fixture 1 has cylindrical portions 10 formed at the both ends of a semi-cylindrical shape of the same shape by metal, and these cylindrical portions 10 are connected by connecting portions 5 provided at intervals in the axial direction. In addition, the through-hole 2 is formed between the connecting portions 5. The through-hole 2 is for filling a refractory material 4 such as mortar, which is filled outside the fixing device 1, into the fixing device 1 to close a gap between the long object C and the through hole B. Therefore, it is desirable that the refractory material 4 has a shape that allows the refractory material 4 to flow easily. In this embodiment, as shown in FIG. 3a, connecting portions 5 are formed on both sides in the width direction of each fixture 1, and locking claws 6 projecting in opposite directions to one longitudinal end of each connecting portion 5 are provided. Is formed.
After the fixing tool 1 is put on the outside of the long object C so that the connecting portions 5 are overlapped with each other, the locking claws 6 are folded back to the outside of the other connecting portion 5 as shown in FIG. Thus, both fixtures 1 are fixed. The length of the fixture 1 is at least the thickness T of the penetration part of the fire protection compartment A (FIG. 2).
It is necessary to be above.

The fixing device 1 may have a shape other than those described above. For example, as shown in FIG. 4, the fixing device 1 of FIG. The material is not limited to metal, but may be any material having fire resistance.

Reference numeral 3 shown in FIGS. 1 and 2 denotes a thermally foamable flame-resistant material filled between the half-cylindrical portion 10 at both ends of the fixture 1 and the elongated object C. The thermally foamable flame-resistant material 3 foams when heated to form a foamed heat insulating layer, and when heating is further continued, the previously formed foamed heat insulating layer is peeled off to form a new foamed heat insulating layer. This operation is repeated to maintain the heat insulating effect for a long time.

For example, "Danseal F" (trade name: manufactured by Furukawa Electric Co., Ltd.) or the like is used as the thermally foamable flameproof material 3. This Danseal F is a foam that has already been foamed to some extent, and has a small heat capacity and a high volume expansion rate.
Therefore, the heat inside is quickly transmitted and rapidly expanded greatly, so that the space and the cavity in the elongated object C such as a flexible conduit made of synthetic resin are securely closed. Moreover, since it is a foam, it is soft and easily conforms to the surface of the long object C, and after foaming, it changes into an insulated product having a high heat insulating property, so that there is an advantage that the heat insulating effect is extremely high.

As the thermally foamable flame-resistant material 3, "Danseal D" (trade name, manufactured by Furukawa Electric Co., Ltd.) or the like may be used. This Danseal D is a non-foamed clay-like composition, and has a large heat capacity and a high density.
Accordingly, the long object C such as the synthetic resin flexible conduit can be crushed with a relatively low but strong pressing force, and the inside of the long object C is completely closed. In addition, as in the case of the Danseal F, after the foaming, it changes into an insulated product having a high heat insulating property, so that the heat insulating effect is very high.

As the heat-expandable flame-resistant material 3, besides the above, for example, Phomox (trade name: Bayer AG, West Germany)
And Firestop (product name: Dow Corning, USA) can be used.

If the heat-foamable flame-resistant material 3 is filled as shown in FIG. 1 when a fire occurs, the heat-foamable flame-resistant material 3 flows from the through-hole 2 before the foam / expansion occurs in the early stage of the fire. The smoke or flame that has been passed through the gap between the thermally foamable flame-resistant material 3 and the long object C due to the refractory material 4 closing the long object C and the through hole B does not pass beyond that point. . Furthermore, long object C
Is maintained in an oxygen-deficient state.
The burning of the long object C can be delayed until the self-combustion is delayed and the flame-retardant thermally foamable material 3 continues to foam and expand.

When the fire becomes large, the thermally foamable flame-resistant material 3 expands by foaming due to the flame or heat. However, the outer periphery of the thermally foamable flame-resistant material 3 is covered by the fixture 1. Then, the inside of the fixture 1 is completely closed and the long object C is pressed so as to be crushed from the outside. For example, when the long object C is a synthetic resin flexible conduit tube or the like, the long object C is The cavity formed by melting or burning is closed, and the spread of fire from that location is prevented. Further, since the foamed and expanded thermally foamable flameproof material 3 is finally transformed into an incinerated substance having a high heat insulating effect, the propagation of heat to the adjacent room is interrupted.

In each of these embodiments, the fire protection compartment A
Is a wall only, but the fire protection compartment A
May be a floor or the like, in which case, before filling the refractory material 4, the lower end of the gap between the fixture 1 and the through hole B is closed by a refractory material support plate 7 or the like, It is desirable that the refractory material 4 filled in the gap does not leak downward.

FIG. 4 shows another embodiment of the two-part fixing tool 1 to be put on the outside of the long object C. As shown in FIG. The fixture 1 is formed of metal, and two semi-cylindrical cylindrical portions 10 of the same shape are formed at each longitudinal end of the plate-shaped connecting portion 5, and the longitudinal center portion of the connecting portion 5 is formed. An opening 2 into which a refractory material 4 (4 in FIGS. 1 and 2) flows is formed in
Further, as shown in FIG. 4 (a), a locking claw 6 is attached to one longitudinal end of the central portion of the connecting portion 5 and the other longitudinal opposite ends of the connecting portion 5 (an end opposite to the longitudinal end). Is protruded.

This fixture 1 is a long object C as shown in FIGS.
After covering the outside of the fixing tool 1, the locking claws 6 of each fixing tool 1 are folded back to the outside of the connecting portion 5 of the other fixing tool 1, so that
The two fixtures 1 are connected and fixed outside the long object C.
It is necessary that the length of the fixture 1 is also at least equal to or greater than the thickness T (FIG. 2) of the penetrating portion of the fire protection compartment A.

[0026]

According to the present invention, the structure of the fire protection device for the long object penetration portion in the fire protection compartment has the following effects. a. Even if smoke or flame passes through the gap between the long object C and the thermo-foamable flame-resistant material 3 in the fixture 1 at the early stage of the fire, that is, before the thermo-foamable flame-resistant material 3 foams, Since the refractory material 4 that closes the gap between the long object C and the through hole B at the through hole 2 of the fixture 1 is in close contact with the long object C, the passage of smoke and flame is blocked. Since the long object C after the opening 2 does not spread to the adjacent room and is kept in an oxygen-deficient state, the burning of the long object C itself is delayed.

B. Since the long object C is in close contact with the refractory material 4, it becomes difficult to burn, and the spread of the long object C is delayed for a considerable time until the thermally foamable flame-resistant material 3 foams and exhibits a sufficient effect. . In addition, it is possible to exhibit a water stopping function of preventing rainwater or the like from entering the dwelling side along the outer surface of the long object C, thereby preventing pests from entering.

C. Since the thermally foamable flameproof material 3, the fixture 1, and the long object C are integrally fixed by the backfilling refractory material 4 that has entered through the through hole 2, the thermally foamable flameproof material is subjected to earthquakes or other vibrations. The flame member 3 or the fixture 1 is hard to fall off, and there is no possibility that the fire prevention function is impaired.

D. The heat-expandable flame-resistant material 3 is attached, and the divided fixture 1 is covered by covering the outer periphery of the long object C,
Since it is only necessary to refill the through-hole B with the refractory material 4, the construction is easy, the workability is good, the structure is simple and the cost is reduced. Further, since the non-combustible fibers D do not scatter as in the related art, the working environment is also improved.

E. Since the elongate object C itself is supported in the through hole B by the refractory material 4, it is possible to prevent the thermally foamable flame-resistant material 3 from being deformed by the load of the elongate object C. It is difficult to form a gap with the thermally foamable flameproof material 3. Therefore,
It is possible to avoid a decrease in fire protection performance.

F. Thermal foaming flame-resistant material 3 when fire gets bigger
, The inside of the fixture 1 is sealed, the long object C is crushed, and the cavity formed by melting or burning of the long object C is closed,
The spread of fire from the location is prevented. Further, since the foamed and expanded thermally foamable flameproof material 3 is finally transformed into an incinerated substance having a high heat insulating effect, the propagation of heat to the adjacent room is interrupted, and a sufficient fireproof effect is exhibited.

G. Further, since the refractory material 4 filled in the through hole B is in direct contact with the long material C, when the long material C burns, the heat is transmitted to the refractory material 4 and escapes, and the long material C is discharged. Temperature rise is suppressed. In addition, the fixing device 1 includes the cylindrical portions 1 at both ends.
Since the space between 0 is connected by the connecting portion 5, the heat transfer from one end to the other end is suppressed. Therefore, according to the fire prevention measure structure of the present invention, fire prevention performance can be improved.

I. Further, in the fire protection structure of the present invention, since the refractory material 4 is filled up to the long object C, the long object C
And the flow of smoke and water to the opposite side of the fire prevention compartment A along the outer surface of the fire prevention compartment A. Therefore, according to the fire protection structure of the present invention, a smoke prevention function and a water stop function can be obtained.

J. Since the fire protection device used in the fire protection structure of the present invention is provided with the through-hole 2, the fire-resistant material 4 can be put into the fixture 2 from the through-hole 2 when the fire protection structure is constructed. . Therefore, the fire protection structure can be easily constructed.

[Brief description of the drawings]

FIG. 1 is a perspective view, partly in section, showing an example of a fire protection structure of a long object penetration portion in a fire protection compartment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state of the fire prevention structure of FIG. 1 at the time of fire.

FIG. 3 (a) is an explanatory view of a state in which a fixing tool is put on a long object in the fire prevention structure, and FIG. 3 (b) is an explanatory view of using a locking claw of the fixing tool.

FIG. 4 is another example of a fixture, and FIG. 4 (a) is a front view,
FIG. 2B is a side view, and FIG. 2C is a bottom view.

FIG. 5 is a vertical sectional view showing another example of the fire prevention measure structure of the long object penetrating portion in the fire prevention compartment of the present invention.

FIG. 6 is a vertical cross-sectional view of a structure for preventing fire from passing through a long object in a conventional fire protection compartment.

[Explanation of symbols]

 1 is a fixture 2 is a through hole 3 is a heat-expandable flame-resistant material 4 is a refractory material A is a fire-resistant compartment B is a through hole C is a long object

Claims (1)

(57) [Claims] 1. A long object (C) such as a cable or a pipe is inserted into a through hole (B) opened in a fire protection section (A) such as a floor or a wall.
Has a tubular portion (10) that can be divided in the circumferential direction at both ends,
Further, a fixing device (1) in which the cylindrical portions (10) are connected by a connecting portion (5) with an interval in the axial direction and a through-hole (2) is formed between the connecting portions (5), The elongate object (C) is covered with an outer periphery of the elongate object (C) so that the through-hole (2) is located in the through hole (B), and the elongate object (C) is surrounded by a cylindrical portion ( 10).
Between the part (10) and the long object (C)
(3) is disposed, the refractory material (4) is buried back from the through hole (B) to the inside of the through hole (2), the through hole (B) is closed with the refractory material, and the length of the through hole (2) is increased. A fire prevention measure structure for a long object penetrating portion in a fire protection compartment, wherein a gap between a long object (C) and a through hole (B) is closed.