JPH06264553A - Ceiling cornice structure for ventilation - Google Patents

Abstract

PURPOSE:To efficiently perform ventilation by providing a ventilating air passage communicating with the inner part of the ceiling between a ceiling board and a ceiling cornice and providing an incombustible volume expanding material in the inner part of the ventilating air passage over the whole length in a band form. CONSTITUTION:One edge of a ceiling board 1 is mounted on and fixed to a tip shielding plate 3 suspended from a roof, and the other edge of the ceiling board 1 is mounted on a wall plate 5 through a backing timber 4. A spacer 6 is interposed with keeping a specific clearance between the backing timber 4 and the wall plate 5, and a L-shaped sectional ceiling border 7 is mounted on the wall plate 5 by small screw 8. A ventilating air passage 9 communicating with the inner part of the ceiling is formed among the ceiling plate 1, the ceiling border 7 and the wall surface 5, and an incombustible volume expanding material 10 is buried in the recessed groove 7a of the ceiling border 7. Thus, at a conflagration, the incombustible volume expanding material can be expanded by the heat to automatically close the ventilating air passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation structure capable of ventilating around a ceiling of a roof of a building or the like, and particularly to a ceiling capable of automatically shielding a ventilation air passage in the ceiling in case of fire. The present invention relates to a ventilation rim structure for ventilation.

[0002]

2. Description of the Related Art As a conventional structure for attaching a ceiling plate to a ceiling via a ceiling plate support, for example, Japanese Patent Laid-Open No. 63-25 is available.
Japanese Patent No. 5442 is known. This technique is a technique in which a ceiling plate supporter having a U-shaped cross section is attached to a wall surface of a building, and an end portion of the ceiling plate is inserted into the ceiling plate supporter to form a ceiling.

As a structure in which a ventilation hole is provided on the parting edge of the ceiling, for example, Japanese Utility Model Laid-Open No. 2-68923 is known. This technique is a technique in which a mesh interposing material is integrally provided on a part of the parting edge that can support the ceiling plate, and thereby the ceiling is ventilated by the parting edge.

[0004]

However, although the ceiling having a structure in which the ceiling board is supported by using the former ceiling board supporter having a U-shaped cross section has a simple structure and good workability, this technique is used. The ceiling of the structure used had the problem that ventilation was difficult. Also, when the ceiling is constructed by using the ceiling parting edge with mesh interposing material in the latter part, it is extremely convenient because ventilation can be done with the parting edge supporting the ceiling plate, but in the event of a fire There was a problem that the ventilation holes could not be closed automatically.

Therefore, conventionally, when it is necessary to prevent fire in the event of a fire, it is common to attach a ventilation opening with a damper that can be automatically closed at the heating temperature in the fire to a part of the ceiling. It was

However, the ventilation port with the damper is relatively complicated and expensive, and in order to mount it on the ceiling, a part of the ceiling plate is cut and incorporated,
There is a problem that it takes much time and cost to assemble the base of the mounting portion.

The ventilation rim structure for a ceiling according to the present invention is
This is a completely new technology developed in view of the above-mentioned conventional problems, in which a ventilation air passage communicating with the ceiling is provided between the ceiling plate, the ceiling peripheral edge and the wall surface, and the non-combustible volume expansion is provided in this passage. By providing the material, it is possible to expand the noncombustible volume expanding material in the event of a fire to provide a completely new technique for closing the passage.

[0008]

A ventilation structure for a ceiling according to the present invention is a technique which has fundamentally improved the above-mentioned conventional problems, and its gist is to provide a structure between a ceiling plate, a ceiling edge and a wall surface. A ventilation air passage communicating with the back of the ceiling is provided, and a non-combustible volume expansion material that expands due to heat is provided in a band shape over the entire length in the ventilation air passage. Is.

[0009]

As described above, the ceiling ventilation rim structure according to the present invention has the ventilation air passage communicating between the ceiling plate and the ceiling rim and the wall surface, which communicates with the back of the ceiling. The ceiling can be ventilated by.

The ceiling plate is made of non-combustible material,
In addition, since the non-combustible volume expansion material that expands due to heat is provided in a strip shape over the entire length in the ventilation air passage formed around the ceiling plate, at the time of fire, the non-combustible volume expansion material expands due to heat and is used for ventilation. The air passage can be automatically closed.

[0011]

1 is a perspective view showing an example of a ceiling rim structure for ventilation of a ceiling according to the present invention. FIG. 2 is a perspective explanatory view showing an example of a rim structure for ventilation of a ceiling according to the present invention. 1 is a cross-sectional view of FIG. 1, FIG. 3 is an enlarged explanatory view of an essential part of FIG. 1, FIG. 4 is an enlarged explanatory view of an essential part of FIG. 2, FIG.
FIGS. 6B and 6C are cross-sectional explanatory views showing a state in which the noncombustible volume expansion material closes the ventilation air passage, and FIG.
7B is an explanatory view showing the structure of the second embodiment, and FIG.
(A) and (B) are explanatory views showing the structure of the third embodiment, respectively.
8A and 8B are explanatory views showing the structure of the fourth embodiment, and FIGS. 9A and 9B are explanatory drawings showing the structure of the fifth embodiment, respectively.

In FIGS. 1 to 5 (A), (B), and (C), reference numeral 1 is a ceiling plate, one edge of which is attached and fixed to a nose tip concealing plate 3 suspended from a roof 2. ing.
The other end edge of the ceiling board 1 is attached to the wall board 5 via the field edge 4. A spacer 6 is interposed between the field edge 4 and the wall panel 5 with a predetermined space therebetween, and the wall panel 5 and the field edge 4 are inserted.
A gap is formed between the edge of the ceiling plate 1 and the edge surface of the ceiling plate 1.

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

Therefore, due to the above-mentioned gap between the wall plate 5, the field edge 4 and the ceiling plate 1, and the gap between the ceiling edge 7 and the ceiling plate 1, the wall plate 5, the field edge 4, the ceiling plate 1 and the ceiling edge 1. Ventilation air passages 9 are formed between 7 and communicate with the ceiling above the ceiling. The ceiling edge 7 is provided with a groove 7a in the shape of a strip, and the groove 7a has a nonflammable volume expansion material 10a.
Is buried.

The non-combustible volume expansion material 10 is an expansive graphite-based flameproof and smokeproof sealing material generally used as a noncombustible volume expansion material, and has a hot air temperature of 1 at a maximum.
It has the property of expanding about 10 times at 50 to 170 ° C.

Examples of this non-combustible volume expansion material include:
Austria "Intumex" manufactured by Chemie Linz, and Japanese Patent Publication No. 63-132968 (fireproof composition of the invention), Dohei 3-235 (fireproof / fireproof mat of the invention), etc. Or technology is used.

Therefore, when the space of the ventilation air passage 9 is about 3 to 4 times that of the noncombustible volume expandable material 10 when the noncombustible volume expandable material 10 expands, a high density state is obtained. The ventilation air passage 9 can be closed with. Also,
This graphite-based substance is nonflammable and has the property of not burning or melting even when the heating temperature reaches 850 ° C.

Since the ceiling ventilation structure according to the present invention has the above-mentioned structure, in a normal state, as shown in FIG. 5 (A), the non-combustible volume expandable material 10 does not expand and remains in a contracted state. It is embedded inside the concave groove 7a of the ceiling edge 7. Therefore, the ventilation air passage 9 is kept in a fully opened state.

Next, when a fire occurs and hot air of about 150 degrees or more begins to enter the ventilation air passage 9, as shown in FIGS. Expansive material 10
Expands, and the non-combustible volume expansion material 10 can completely close and block the ventilation air passage 9.

In the ceiling edge 7 in the above-mentioned embodiment, the tip bent portion 7b is formed by bending the tip upward slightly, but as shown in FIGS. 6 (A) and 6 (B), the tip bent portion 7b is formed. It is also possible to form a long grid-like shape with a constant space and to abut this long part on the lower surface of the ceiling plate 1.

Further, as shown in FIGS. 7 (A) and 7 (B), the tip bent portion 7b of the ceiling rim 7 is lengthened as a whole, and the entire length of the tip is in contact with the ceiling plate 1 and the ceiling rim 7 is provided. It is also possible to form a continuous slit 7c in a strip shape on the lower surface of the tip side of the. In the above embodiment, the ceiling edge 7
8 is attached to the wall plate 5, the ceiling edge 7 is attached to the lower surface of the ceiling plate 1 as shown in FIGS.
It is also possible to form the ventilation air passage 9 between the ceiling edge 7, the edge of the ceiling plate 1 and the field edge 4.

In the case of this embodiment, the lower end portion 7d of the ceiling edge 7 can be bent into an arbitrary shape, and the noncombustible volume expansion material 10 can be attached to the bent lower end portion 7d.

Further, a ceiling edge 7 having a shape as shown in FIGS. 9A and 9B can also be used. Both ends of the ceiling 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 strip shape on the central inclined surface. Further, the non-combustible volume expansion material 10,
It is attached to the front surface of the ceiling plate 1 facing the ventilation air passage 9.

[0024]

Since the ceiling ventilation rim structure according to the present invention has the above-described structure and function, a fire vent for ventilation can be easily formed at the ceiling rim. Therefore, since it is not necessary to attach the ventilation opening with the fireproof damper as in the conventional case, it is possible to completely omit the work such as cutting the eaves ceiling board and assembling the foundation. In addition, since the ceiling ventilation ventilation rim structure of the present invention can continuously provide ventilation holes around the ceiling, it is possible to perform a sufficient amount of ideal ventilation.

Further, since the ceiling rim structure for ventilation of the ceiling according to the present invention has the above-mentioned structure, at the same time as a fire occurs and hot air begins to be blown from the ventilation holes, the ventilation air passage is completely closed in a short time. Can be shut off. Moreover,
The ventilation rim structure for ventilation of the ceiling of the present invention can be attached to the back of the eaves as a parting line, and thus has a feature that it can be an extremely excellent structure in terms of design.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of FIG.

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

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

5 (A), (B), and (C) are cross-sectional explanatory views showing a state in which a noncombustible volume expansion material closes a ventilation air passage.

6 (A) and 6 (B) are explanatory views showing a structure of a second embodiment.

7 (A) and 7 (B) are explanatory views showing the structure of a third embodiment.

FIGS. 8A and 8B are explanatory views showing the structure of the fourth embodiment.

9 (A) and 9 (B) are explanatory views showing a structure of a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ceiling board 2 ... Roof 3 ... Nose tip hiding board 4 ... Wild edge 5 ... Wall board 6 ... Spacer 7 ... Ceiling edge 7a ... Recessed groove 7b ... Tip bending part 7c ... Continuous slit 7d ... Lower end part 8 ... Screw 9 ... Ventilation air passage 10 ... Nonflammable volume expansion material

Claims (1)

[Claims] 1. A ventilation air passage communicating with the back of the ceiling is provided between a ceiling plate, a peripheral wall of a ceiling, and a wall surface, and a noncombustible volume expansion material that expands due to heat is formed into a strip shape over the entire length in the ventilation air passage. Ventilation structure for ventilation of the ceiling characterized by being provided.