JP3477185B2 - Peripheral structure for ventilation of ceiling - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation structure capable of providing ventilation at a peripheral edge of a ceiling such as the back of a hut of a building, and more particularly to a ventilation air passage for a ceiling in the event of a fire. The present invention relates to a peripheral structure for ventilation of a ceiling, which can automatically shield the ceiling. 2. Description of the Related Art Conventionally, a structure in which a ceiling plate is attached to 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] 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 using this technique has a problem that ventilation is 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 which fundamentally improves the above-mentioned conventional problems, and the gist of the first invention is to provide a ceiling plate. A ventilation air passage is provided between the fore-edge surface and the wall plate, a non-combustible inflatable material is attached to the fore-edge surface of the ceiling plate, and a ceiling slit having a continuous slit formed in a central inclined surface is provided in the ventilation air passage. At the lower entrance portion, one side edge of the peripheral edge of the ceiling supports the lower surface of the ceiling plate, and the other side edge is in contact with the upright surface of the wall plate and fixed via screws. It is a rim structure for ventilation of the ceiling. In the present invention, as described above, a ventilation air passage is formed between the small face of the ceiling plate and the wall plate, and the nonflammable inflatable material is directly attached to the small face. With this configuration, the configuration of the ventilation air passage and the configuration that can close the ventilation air passage in the event of a fire can be made extremely simple, and at the same time, can be configured with good workability and at low cost. I have. Further, in the present invention, the lower entrance of the ventilation air passage formed between the small edge surface of the ceiling plate and the wall plate is closed by a central inclined surface having a continuous slit at the periphery of the ceiling, And by supporting the lower surface of the ceiling plate with one side edge of the ceiling peripheral edge, and fixing the other side edge against the vertical surface of the wall panel, the ceiling panel is stably attached to the wall panel via the ceiling peripheral edge. Mounting, which allows for installation around the ceiling rim,
The structure of the ventilation structure can be simplified, and workability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of a ceiling ventilation structure according to the present invention; FIG. 1 is a perspective view showing an example of a ceiling ventilation structure according to the invention; 2, FIG. 2 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.
(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 end of the ceiling plate 1 is attached to a wall plate 5 via a ridge 4. A spacer 6 is interposed between the ridge 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, 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 ceiling rim A ventilation air passage 9 is formed between the members 7 and communicates with the space above the ceiling. A 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 groove 7a. The non-combustible volume expander 10 is an expandable graphite-based flame-proof and smoke-proof seal material generally used as a non-combustible volume expander, and has a passing hot air temperature of 150 to 170 ° C. Has the property of expanding about 10 times. As the non-combustible volume expansion material, for example,
"Intzmex" manufactured by Austrian Chemie Linz
In addition, products and techniques described in JP-B-63-132968 (name of the invention, fire protection composition) and JP-A-3-235 (name of the invention, fire protection / fireproof mat) are used. Therefore, when the space of the ventilation air passage 9 is about 3 to 4 times the space of the non-combustible volume expansion material 10 when the non-combustible volume expansion material 10 expands, the high density state With this, the ventilation air passage 9 can be closed. Further, this graphite-based substance has nonflammability, 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 expander 10 does not expand, but contracts 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. Expanding material 1
Thus, the ventilation air passage 9 can be completely closed and blocked by the non-combustible volume expansion 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 the incombustible volume expansion 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
Is mounted on the small edge surface of the ceiling plate 1 facing the ventilation air passage 9. According to the present invention, as described above, a ventilation air passage is formed between the small surface of the ceiling plate and the wall plate, and the noncombustible inflatable material is formed in the small surface. The structure of the ventilation air passage and the structure that can close the ventilation air passage in the event of fire can be made extremely simple by directly attaching and configuring, and at the same time, with good workability and low cost. It has the effect of being able to. Further, in the present invention, the lower entrance of the ventilation air passage formed between the small face of the ceiling plate and the wall plate is closed at the center inclined surface having a continuous slit at the periphery of the ceiling, And by supporting the lower surface of the ceiling plate with one side edge of the ceiling peripheral edge, and fixing the other side edge against the vertical surface of the wall panel, the ceiling panel is stably attached to the wall panel via the ceiling peripheral edge. Mounting, which allows for installation around the ceiling rim,
This has the effect of simplifying the configuration of the ventilation structure and improving workability.

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 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 Signs] 1 ... ceiling plate 2 ... roof 3 ... nose cover plate 4 ... field edge 5 ... wall plate 6 ... spacer 7 ... ceiling edge 7a ... concave groove 7b ... tip bent portion 7c ... continuous slit 7d ... lower end portion 8 Screw 9 Ventilation air passage 10 Non-combustible volume expansion material

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04B 9/00 E04F 19/04 102 E04B 1/62

Claims (1)

(57) [Claims 1] A ventilation air passage is provided between a small face of a ceiling plate and a wall plate, and a non-combustible inflatable material is attached to the small face of the ceiling plate, and the center is inclined. A ceiling peripheral edge having a continuous slit formed in the surface is disposed at a lower entrance portion of the ventilation air passage, and one side edge of the ceiling peripheral edge supports a lower surface of the ceiling plate, and the other side edge stands on the wall plate. A circumscribing structure for ventilation of the ceiling, characterized in that it is fixed to the surface via screws in contact with the surface.