JP3247758B2 - Peripheral structure for ventilation of ceiling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation structure in which ventilation can be performed at a peripheral edge of a ceiling such as the back of a hut of a building, and in particular, a ceiling which can automatically shield a ventilation air passage in a ceiling in a fire. Perimeter structure for ventilation.

[0002]

2. Description of the Related Art A conventional structure for mounting a ceiling plate on a ceiling via a ceiling plate support is disclosed in, for example, JP-A-63-25 / 1988.
No. 5442 is known. In this technology, a ceiling plate support having a U-shaped cross section is attached to a wall surface of a building, and an end of the ceiling plate is inserted into the ceiling plate support to form a ceiling.

Further, as a structure in which a ventilation hole is provided at a parting edge of a ceiling, for example, Japanese Utility Model Laid-Open No. 2-68923 is known. This technique is a technique in which a mesh interposer is integrally provided at a part of a parting edge capable of supporting a ceiling plate, thereby ventilating the ceiling at the parting edge of the ceiling.

[0004]

However, the ceiling of the former structure, in which the ceiling plate is supported by using the ceiling plate support having a U-shaped cross section, is simple in structure and has good workability. The ceiling of the structure used had a problem that ventilation was difficult. In the case where the ceiling is constructed using a ceiling parting edge having a mesh interposer in part of the latter, ventilation is possible with the parting edge supporting the ceiling plate, which is extremely convenient. There was a problem that the ventilation holes could not be closed automatically.

Therefore, conventionally, when fire protection is required in the past, it is common to install a ventilation port with a damper at a part of the ceiling, which can be automatically closed at the heating temperature at the time of the fire. Was.

[0006] However, the ventilation port with the damper is relatively complicated and expensive, and in order to attach it to the ceiling, a part of the ceiling plate is cut and assembled.
There has been a problem that assembling the base of the mounting portion requires much time and cost.

The peripheral structure for ventilation of a ceiling according to the present invention comprises:
A completely new technology developed in view of the above-mentioned conventional problems, a ventilation air passage communicating between the ceiling plate, the periphery of the ceiling and the wall surface is provided in the passage above and below the ceiling, and a non-combustible volume expansion is provided in this passage. By providing a material, it is possible to provide a completely new technology capable of expanding the non-combustible volume expanding material in the event of a fire so as to close the passage.

[0008]

The ceiling ventilation structure according to the present invention is a technique for fundamentally improving the above-mentioned conventional problems, and the gist of the invention is that a vertical piece at the periphery of the L-shaped ceiling is formed on the wall surface. And a front bent portion provided at the front edge of the horizontal piece around the ceiling abuts against the lower surface of the ceiling plate, and a plurality of continuous slits are provided at predetermined positions of the horizontal piece to provide the ceiling plate, the ceiling circumference edge and the wall surface. And a non-combustible volume expansion material which expands by heat is provided between the continuous slit on the ceiling plate side upper surface of the horizontal piece and the wall contact portion in a belt shape. It is a rim structure for ventilation of the ceiling characterized by the following.

[0009]

According to the present invention, as described above, the ceiling peripheral structure for ventilation of the ceiling is provided between the L-shaped ceiling peripheral edge composed of a horizontal plate and a vertical plate provided with a ceiling plate and a plurality of slits continuously and a wall surface. Since a ventilation air passage communicating with the underside of the ceiling is provided, the ceiling can be ventilated by the ventilation air passage. Further, a bent end portion is erected at the end edge of the horizontal piece, and the bent end portion abuts on the lower surface of the ceiling plate, so that the ceiling plate can be firmly supported in a stable state by the edge around the ceiling. I can do it. Further, since the bent end portion is in contact with the lower surface of the ceiling plate, it is possible to prevent insects and dust from entering the ventilation air passage formed around the ceiling plate.

[0010] The ceiling plate is made of a non-combustible material,
And, between the slit of the horizontal piece of the ceiling perimeter of the ventilation air passage formed on the ceiling perimeter and the wall abutting portion, a non-combustible volume expansion material that expands due to heat is provided in a strip shape over the entire length, so in the event of a fire, The non-combustible volume expansion material provided near the slit serving as the air intake is immediately expanded by heat, and the ventilation air passage can be automatically closed. Therefore, it was possible to close the ventilation passage by expanding at a very early stage when the fire occurred.

[0011]

FIG. 1 is a perspective explanatory view showing one example of a ceiling ventilation peripheral structure according to the present invention. FIG. 1 is a perspective view showing an example of a ceiling ventilation peripheral structure according to the present invention. 1 is a sectional view of FIG. 1, FIG. 3 is an enlarged explanatory view of a main part of FIG. 1, FIG. 4 is an enlarged explanatory view of a main part of FIG. 2, FIG.
(B), (C) is a cross-sectional explanatory view showing a state in which the non-combustible volume expansion material closes the ventilation air passage, respectively, FIG.
(B) is an explanatory view showing the structure of the second embodiment, and FIG.
(A), (B) is an explanatory view showing the structure of the third embodiment, respectively,
FIGS. 8A and 8B are explanatory diagrams each showing the structure of the fourth embodiment, and FIGS. 9A and 9B are explanatory diagrams each showing the structure of the fifth embodiment.

1 to 5 (A), (B) and (C), reference numeral 1 denotes a ceiling plate, one end of which is attached and fixed to a nose cover plate 3 suspended from a roof 2. ing.
The other edge of the ceiling panel 1 is attached to a wall panel 5 via a ridge 4. A spacer 6 is interposed between the edge plate 4 and the wall plate 5 at a predetermined interval.
A gap is formed between the ceiling plate 1 and the fore-edge surface.

Reference numeral 7 denotes a peripheral edge of the ceiling, which has an L-shaped cross section with a vertical piece and a horizontal piece, and one side of which is attached to the wall plate 5 via screws 8. A gap is also formed between the ceiling peripheral edge 7 and the lower surface of the ceiling plate 1.

Therefore, the gap between the wall plate 5 and the ridge 4 and the ceiling plate 1 and the gap between the ceiling rim 7 and the ceiling plate 1 and the wall plate 5, the ridge 4, the ceiling plate 1 and the rim of the ceiling A ventilation air passage 9 is formed between the members 7 and communicates with the space above the ceiling. A concave groove 7a is provided in a strip shape on the horizontal piece of the ceiling peripheral edge 7, and a nonflammable volume expanding material 10 is embedded in the concave groove 7a.

The non-combustible volume expanding material 10 is an expandable graphite-based flame-proof and smoke-proof sealing material which is generally used as a non-combustible volume expanding material.
It has the property of expanding about 10 times at 50 to 170 ° C.

As the non-combustible volume expansion material, for example,
Products shown in "Intzmex" manufactured by Austrian Chemie Linz Co., Ltd., Japanese Patent Publication No. 63-132968 (name of fire protection composition of the invention), and Japanese Patent Publication No. Hei 3-235 (name of fire prevention / fireproof coating mat of the invention). Or technology is used.

Therefore, when the space of the ventilation air passage 9 is about three to four times as large as that of the non-combustible volume expanding material 10 when the non-combustible volume expanding material 10 expands, the high-density state is maintained. With this, the ventilation air passage 9 can be closed. Also,
This graphite-based material is nonflammable, and does not burn or melt even when the heating temperature reaches 850 ° C.

Since the ceiling ventilation structure according to the present invention has the above-described structure, in a normal state, as shown in FIG. 5A, the non-combustible volume expansion material 10 does not expand, but is contracted as it is. It is buried inside the concave groove 7 a of the ceiling peripheral edge 7. Accordingly, the ventilation air passage 9 is kept fully open.

Next, when a hot air of about 150 degrees or more starts to enter the ventilation air passage 9 due to a fire, as shown in FIGS. Intumescent material 10
Is expanded, and the ventilation air passage 9 can be completely closed and blocked by the non-combustible volume expanding material 10.

In the above-described embodiment, the bent edge portion 7b is formed by bending the tip bent portion 7b short and upward, but as shown in FIGS. 6A and 6B, the bent tip portion 7b is formed. Can be formed in a lattice shape with a certain interval, and this elongated portion can be brought into contact with the lower surface of the ceiling plate 1.

Further, as shown in FIGS. 7 (A) and 7 (B), a bent front end 7 is formed on the front end of the horizontal piece of the peripheral edge 7 of the ceiling.
b, the entire length thereof is abutted on the lower surface of the ceiling plate 1 to support the ceiling plate 1, and a continuous slit 7 c is formed in a strip shape at the tip side of a horizontal piece of the ceiling peripheral edge 7. It is also possible to configure. In the above embodiment, the ceiling peripheral edge 7 is attached to the wall plate 5, but as shown in FIGS. 8A and 8B, the ceiling peripheral edge 7 is attached to the lower surface of the ceiling panel 1, and It is also possible to form a ventilation air passage 9 between the peripheral edge 7 of the ceiling, the front face of the ceiling plate 1 and the edge 4.

In the case of this embodiment, the lower end 7d of the ceiling peripheral edge 7 can be bent into an arbitrary shape, and a nonflammable volume expanding material 10 can be attached to the bent lower end 7d.

Further, a ceiling peripheral edge 7 having a shape as shown in FIGS. 9A and 9B can also be used. Both ends of the ceiling peripheral edge 7 are in contact with the lower surface of the ceiling plate 1 and the wall plate 5, respectively, and a continuous slit 7c is formed in a belt-like shape in the center inclined surface. In addition, the non-combustible volume expansion material 10
It is attached to a small edge surface of the ceiling plate 1 facing the ventilation air passage 9.

[0024]

As described above, the peripheral structure for ventilation of the ceiling according to the present invention has an L-shaped ceiling peripheral edge and a wall surface which are composed of a ceiling plate and a horizontal piece and a vertical piece provided with a plurality of slits continuously. The ventilation air passage communicating between the ceiling and the ceiling is provided, so that the ventilation air passage can be constructed with an extremely simple structure, and the ceiling air can be ventilated with this ventilation air passage. ing.

Further, a bent end portion is erected at the end edge of the horizontal piece, and the bent end portion abuts on the lower surface of the ceiling plate, so that the ceiling plate is firmly supported by the periphery of the ceiling in a stable state. You can do it. In addition, since the bent end portion is in contact with the lower surface of the ceiling plate, it has an effect of preventing insects, dust, and the like from entering the ventilation air passage formed around the ceiling plate.

Further, the ceiling plate is made of a non-combustible material, and a non-combustible material that expands due to heat is provided between a slit of a horizontal piece around the ceiling of the ventilation air passage formed at the periphery of the ceiling and a wall contact portion. Since the non-combustible volume expander is provided in a strip shape over the entire length, in the event of a fire, the non-combustible volume expander provided near the slit serving as the air intake expands immediately due to heat and automatically opens the ventilation air passage. Can be closed. Therefore, it has an enormous effect, such as being able to expand at a very early time when a fire has occurred and to close the ventilation passage.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing an example of a peripheral structure for ventilation of a ceiling according to the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is an enlarged explanatory view of a main part of FIG. 1;

FIG. 4 is an enlarged explanatory view of a main part of FIG. 2;

FIG. 5 is an explanatory cross-sectional view showing a state in which a nonflammable volume expanding material closes a ventilation air passage.

FIG. 6 is an explanatory diagram showing a structure of a second embodiment.

FIG. 7 is an explanatory diagram showing a structure of a third embodiment.

FIG. 8 is an explanatory diagram showing a structure of a fourth embodiment.

FIG. 9 is an explanatory diagram showing a structure of a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ceiling board 2 ... Roof 3 ... Nose concealing board 4 ... Field edge 5 ... Wall board 6 ... Spacer 7 ... Ceiling circumference edge 7a ... Depression groove 7b ... Tip bent part 7c ... Continuous slit 7d ... Lower end part 8 ... Screw 9 ... Air passage for ventilation 10: non-combustible volume expansion material

Continuation of the front page (56) References JP-A 56-143314 (JP, U) JP-A 1-61309 (JP, U) JP-A 60-137040 (JP, U) JP-A 64-29441 (JP) , U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04B 9/02 E04F 19/04 102

Claims (1)

(57) [Claims] 1. A vertical piece of an L-shaped ceiling peripheral edge is attached to a wall surface, and a tip bent portion provided at a distal end edge of a horizontal piece of the ceiling peripheral edge is brought into contact with a lower surface of a ceiling plate, and a predetermined position of the horizontal piece is provided. A plurality of continuous slits are provided to provide a ventilation air passage between the ceiling plate, the ceiling peripheral edge and the wall surface, and furthermore, heat is applied between the continuous slit and the wall contact portion on the ceiling plate side upper surface of the horizontal piece. A rim structure for ventilation of a ceiling, wherein a non-combustible volume expanding material that expands is provided in a belt shape.