JP3995196B2 - Ventilation structure of eaves ceiling - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ventilation structure for an eaves ceiling that attaches an eaves top plate to a space between a front end of a roof eave and a building outer wall in a building or on a backside of a balcony.
[0002]
[Prior art]
Conventionally, as this type of eaves-behind ceiling ventilation structure, for example, one disclosed in JP-A-6-73828 is known. The support fitting used in this ventilation structure is provided with an insertion recess having a substantially U-shaped cross section so that the end of the ceiling plate can be inserted. Thus, a ventilation hole provided with a large number of slits is provided, and ventilation between the outside and the eaves space portion is possible through the ventilation hole and the ventilation vent.
[0003]
In addition, the support bracket is provided with a non-combustible volume expansion material (hereinafter also referred to as “thermal expansion material”) near the ventilation hole, which expands in the event of a fire and closes the ventilation vent. It is configured not to invade or sparks.
[0004]
[Problems to be solved by the invention]
By the way, these noncombustible volume expansion materials are conventionally pasted and fixed at a position where the ventilation passage on the inner surface of the ventilation fitting is closed using a double-sided tape or an adhesive.
[0005]
However, when fixing these noncombustible volume expansion materials using double-sided tape or adhesive, this noncombustible volume expansion material is treated with double-sided tape or adhesive, and then aligned with the mounting position in the support bracket. However, it must be fixed.
[0006]
Since these non-combustible volume expansion materials are generally attached at a deep position on the inner surface portion of the support metal, the position is easily shifted during the pasting, which is a very troublesome operation for alignment. In particular, if the non-combustible volume expansion material is attached in a misaligned state, it will not foam at the specified position in the event of a fire. There was a possibility not to show. In addition, the work of treating the volume expansion material with a double-sided tape or an adhesive is time-consuming and causes labor and cost increase.
[0007]
On the other hand, it is generally necessary to close the vent hole with a volume expansion material etc. in the fire prevention area, and it is not necessary to close it in the non-fire prevention area. There is a possibility that the storage is cumbersome, and both are confused and mistakenly constructed.
[0008]
Furthermore, in the conventional support metal fitting, since the ventilation hole is on the lower surface of the support metal fitting, the ventilation hole can be easily seen from the lower side, and the appearance may be poor.
[0009]
The present invention has been made in view of the above circumstances, and can greatly reduce the labor and cost at the time of manufacture, stabilize the fireproof performance in the event of a fire, and further use a good-looking ventilation fitting. The purpose is to provide a back ceiling ventilation structure.
[0010]
According to a first aspect of the present invention, there is provided a ventilating ceiling ventilation structure in which a nonflammable ceiling plate is supported and fixed by using a support fitting. The support fitting is provided for ventilation through the ventilation hole from the outside through the ceiling. A ventilation passage is provided, and an attachment locking piece is provided in the ventilation ventilation passage, and the attachment locking piece expands without burning by heat and closes the ventilation ventilation passage. It is characterized in that the material is stored in such a way that it can be inserted and removed freely.
[0011]
According to a second aspect of the present invention, an insertion recess for inserting a ceiling plate is provided on one side of the support bracket, a ventilation hole is provided on the other side, and the other side is attached and fixed to the outer wall of the building. It is characterized by being.
[0012]
According to a third aspect of the present invention, there is provided a ventilation passage provided between the other side surface and the outer wall on the other side surface by a thermal expansion material housed in an attachment locking piece provided on the other side surface of the support fitting. It is characterized by closing.
[0013]
[Action]
According to the first aspect of the present invention, since the thermal expansion material that closes the ventilation ventilation path is housed in the support fitting so as to be freely inserted into and removed from the attachment locking piece provided in the ventilation ventilation path, Easy storage, saving labor and labor, and cost reduction.
[0014]
According to the second invention, since the insertion recess for inserting the ceiling plate is provided on one side of the support metal fitting, the ventilation hole is provided on the other side, and the other side is attached and fixed to the outer wall. The structure is simple, the cost can be reduced, and the appearance is improved because the ventilation hole is located on the other side surface and cannot be easily seen from the lower side.
[0015]
According to the third invention, the mounting locking piece is provided on the other side surface of the support bracket, and can close the ventilation air passage provided between the other side surface and the outer wall on the other side surface. The structure can be made strong, the cost can be reduced, and the appearance is improved.
[0016]
[Embodiment]
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a first example of a support fitting 1 according to the present invention, FIG. 2 is a cross-sectional view showing an example of use of the first example, and FIG. 3 is a perspective view showing the second example. 4 is a cross-sectional view showing a usage example of the second example, FIG. 5 is a perspective view showing the third example, and FIG. 6 is a cross-sectional view showing a usage example of the third example.
[0017]
A first example shown in FIGS. 1 and 2 will be described. The support fitting 1 includes an insertion recess 3 into which a nonflammable ceiling plate can be inserted using a single long metal plate 2 having a predetermined width, a ventilation passage 4 through which outside air passes, and a thermal expansion material that expands by heat. And a support piece 6 provided with a plurality of ventilation holes and attachment holes in a row.
[0018]
The insertion recess 3 is formed in a mountain shape with an upward plate 20 projecting diagonally forward and upward and a downward plate 21 projecting diagonally downward and forward at the front end of a single long metal plate 2 having a predetermined width. An extending piece 23 is formed that extends forward and horizontally extends through a first hanging piece 22 that hangs down from the rear end of the metal plate 2, and extends upward and downward from the upper and lower plates 20 and 21 and the hanging piece 22. The insertion recess 3 is constituted by the protruding piece 23.
[0019]
The rear end portion of the metal plate 2 following the extending piece 23 is folded back backward through the second hanging piece 24 extending horizontally and extends horizontally, and is slightly longer than the extending piece 23. Further, a support piece 6 is formed at the rear end portion between the vertical pieces 26 and 27 extending vertically upward via a bent piece 28. The support piece 6 has a plurality of ventilation holes 60, 60,... In a row and a plurality of mounting holes 61, 61,.
[0020]
In the illustrated example, the mounting locking piece 5 has a plurality of narrow, substantially L-shaped projecting pieces 50 formed on the rear side surface of the first vertical piece 22 at predetermined intervals. It is good also as an approximately L-shaped protrusion piece. Further, a ventilation passage 4 is formed between the first vertical piece 22 and the support piece 6 through the ventilation holes 60, 60,.
[0021]
The said thermal expansion material 9 should just have the performance which can expand without burning with heat and can block the ventilation path 4 for ventilation. For example, there is an expanded graphite-based flameproof / smokeproof sealant, and an expandable material that expands about 10 times at a passing hot air temperature of 150 to 170 ° C. can be mentioned. Other examples include vermiculite and ceramic fiber sealing materials, expanded graphite and alumina trihydrate sealing materials, and rubber sealing materials. A moderate amount can be used as appropriate. For example, Sekisui Chemical Co., Ltd. trade name Fibro, Sumitomo 3M Co. trade name Ultra GS, Nichias Co., Ltd. trade name Vermoflex, etc. can be used.
[0022]
Next, the usage method of the said support metal fitting 1 is demonstrated. First, the thermal expansion material 9 is accommodated in the mounting locking piece 5, and the support fitting 1 is placed in the mounting holes 61, 61,... The fastening material 62 is used for fixing. And the ventilation structure of a back-and-back ceiling can be comprised by inserting the edge part of the ceiling board 7 in the insertion recessed part 2 of the support metal fitting 1. FIG. Of course, the thermal expansion material 9 may be attached after the ceiling plate 7 is attached to the support fitting 1.
[0023]
Accordingly, when a fire occurs, the thermal expansion material 9 starts to expand when the hot air passes through the ventilation passage 4 and comes into contact with the thermal expansion material 9, and the expanded thermal expansion material 9a. Can completely block the ventilation passage 4. Therefore, it is possible to prevent a flame or spark from entering through the ventilation hole from the outside.
[0024]
In the second example of the support fitting 1a shown in FIGS. 3 and 4, a long and substantially L-shaped protruding piece 51 is formed on the attachment locking piece 5a, and the vertical support piece 6a at the rear end is formed on the vertical support piece 6a. A plurality of bent portions 65a, 65b,... Are formed in a zigzag shape between the vertical portion 63 at the base end and the vertical portion 64 at the upper end, and the other configurations are the same as those of the support bracket 1 of the first example. Therefore, description of the configuration is omitted.
[0025]
By adopting such a configuration, the thermal expansion material 9 expanded in the event of a fire or the like is pressed by the bent portion 65a, so that the thermal expansion material 9 can be prevented from being scattered and the fireproof performance is improved.
[0026]
5 and 6, the support bracket 1 b of the third example is provided with a mounting locking piece 5 a formed of a long, substantially L-shaped protruding piece 51 on the rear side surface of the support piece 6. The other configuration is the same as that of the support bracket 1 of the first example, and thus the description of the configuration is omitted.
[0027]
With the above configuration, since the thermal expansion material 9 is attached to the outer peripheral surface of the support metal 1b, the thermal expansion material 9 can be replaced even after the support metal 1b and the ceiling plate 7 are installed, and maintenance during long-term use is possible. Improves.
[0028]
【The invention's effect】
Since this invention is the said structure, there exists the following effect.
(1) The thermal expansion material only needs to be stored in the mounting locking piece, and there is no need to perform operations such as attaching an adhesive or double-sided tape. In addition, if it can be freely inserted into and withdrawn from the mounting locking piece, the mounting operation is simple, so that the number of work steps and labor can be saved and the cost can be reduced.
{Circle around (2)} The thermal expansion material can be taken in and out, and it is extremely simple. It is possible to respond to the necessity of the thermal expansion material even at the work site, and the correspondence is simple. In addition, even if there is a need for two types of ventilation brackets that have both fire-proof and non-fire-proof zones, only one type can be prepared and handled on-site, so the workability is greatly improved.
(3) Since the mounting operation is completed simply by storing the thermal expansion material in the mounting locking piece, the positioning is extremely simple and the positional deviation is small, and the desired fire-proof performance is always exhibited stably. can do.
(4) The ventilation passage is provided on the outer wall side of the support fitting and is not easily visible from the lower surface, so that the appearance is improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first example of a support fitting 1 according to the present invention.
FIG. 2 is a sectional view showing a usage example of the first example.
FIG. 3 is a perspective view showing the second example.
FIG. 4 is a sectional view showing an example of use of the second example.
FIG. 5 is a perspective view showing the third example.
FIG. 6 is a sectional view showing a usage example of the third example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support metal fitting 4 Ventilation ventilation path 5 Mounting latch piece 7 Ceiling board 9 Thermal expansion material

Claims (3)

In the ventilation structure of the eaves-and-ceiling ceiling in which a nonflammable ceiling plate is supported and fixed using a support bracket, the support bracket is provided with a ventilation vent for passing through a ventilation hole from the outside to the back of the ceiling. In the air passage, there is provided an attachment locking piece that is formed from a substantially L-shaped protruding piece that extends from the lower end side of the ventilation hole and is opposed to the ventilation hole, and the attachment locking piece is combusted by heat. A ventilation structure for eaves-and-ceilings, wherein a thermal expansion material that expands and closes the ventilation passage is sandwiched without using double-sided tape or adhesive . 2. The eaves-in-ceiling ceiling according to claim 1, wherein the attachment locking piece is composed of a plurality of substantially L-shaped projecting pieces formed at a predetermined interval or a substantially L-shaped projecting piece formed in a long length. Ventilation structure. The eaves back according to claim 1 or 2 , wherein a vertical support piece attached and fixed to an outer wall of the building is provided on the other side surface of the support fitting, and a plurality of bent portions are provided on the support piece. Ceiling ventilation structure.

Images