JP3988135B2 - Ventilation structure of eaves ceiling - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ventilation structure for an eaves-rear ceiling that attaches a ceiling plate between a roof eave tip and a building outer wall in a building or to a void part on the back of a balcony, and a support fitting and a thermal expansion material holding member used therefor is there.
[0002]
[Prior art]
Conventionally, as this type of eaves-backed ceiling ventilation structure, for example, the one shown in Patent Document 1 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. In addition, ventilation holes with a number of slits are provided on the upper and lower surfaces of the support bracket to allow ventilation to the back of the eaves space, allowing ventilation between the outside and the eaves space through the ventilation holes and ventilation passages. It is possible.
[0003]
In addition, the support bracket is provided with a thermal expansion material that expands near the ventilation holes without burning due to heat, and expands in the event of a fire to block the ventilation vents, so that flames and sparks do not enter from the outside through the ventilation openings. It is configured as follows.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 6-73828
[Problems to be solved by the invention]
By the way, this thermal expansion material is conventionally pasted and fixed at a position where the ventilation passage in the support metal fitting is closed using a double-sided tape or an adhesive.
[0006]
However, when the thermal expansion material is fixed using double-sided tape or adhesive, the double-sided tape or adhesive is applied to the thermal expansion material and then fixed while aligning with the mounting position in the support bracket. There must be.
[0007]
Since this thermal expansion material is generally attached at a deep position in the inner part of the support metal fitting, the position thereof is likely to be shifted at the time of sticking, and this is a time-consuming operation. In particular, if the thermal expansion material is attached in a misaligned position, it will not foam at the specified position in the event of a fire. There was a possibility not to. In addition, the work of fixing the thermal expansion material by applying a double-sided tape or an adhesive is labor-intensive and causes labor and cost increase.
[0008]
Furthermore, in general, it is necessary to close the vent hole of the support fitting with a thermal expansion material or the like in the fire prevention section, but it is not necessary to close in the non-fire prevention section. For this reason, two types of support brackets must be prepared in the case of a site with both fire-proof and non-fire-proof zones, which can be cumbersome to store and can be confused and mistakenly constructed. It was.
[0009]
This invention is made | formed in view of the said situation, and it aims at providing the ventilation technique of the eaves-backed ceiling with good workability | operativity and cost efficiency, stabilizing the fireproof performance at the time of a fire.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a first invention is a ventilation structure for an eaves-ceiling, in which a ceiling plate on the eaves is supported and fixed using a support metal fitting, and the ventilation part is inserted from the insertion portion for inserting the ceiling plate and from outside. A thermal expansion material holding member that holds a thermal expansion material that expands due to heat and closes the ventilation ventilation path can be attached to the support bracket body that has a ventilation path that passes through the hole and goes through the ceiling. It is characterized by.
[0011]
Further, in the second invention, the thermal expansion material holding member includes a pressing piece that presses and holds the thermal expansion material, and an insertion piece that is inserted into an attachment hole provided in the support metal fitting body to be locked. The third invention is characterized in that the thermal expansion material holding member positions the thermal expansion material above the ventilation hole.
[0012]
[Action]
According to the first aspect of the present invention, there is a ventilation structure of the eaves ceiling where the ceiling plate of the eaves is supported and fixed using the support metal fittings, and the insertion part for inserting the ceiling plate and the ventilation hole from the outside to the ceiling back A heat expansion material holding member that holds a thermal expansion material that expands due to heat and closes the ventilation air passage can be attached to a support metal fitting body that has a ventilation air passage that comes off and is fixed to the outer wall. A thermal expansion material holding member will be used only in the location which requires an expansion material.
[0013]
According to the second invention, the thermal expansion material holding member includes a pressing piece that presses and holds the thermal expansion material, and an insertion piece that is inserted into the mounting hole provided in the support metal fitting body and locked. Thus, the thermal expansion material is reliably held by the pressing piece, and can be freely attached to the support metal fitting body by the insertion piece.
[0014]
According to the third invention, the thermal expansion material holding member positions the thermal expansion material above the ventilation hole, so that the thermal expansion material expands in a portion without the ventilation hole and reliably blocks the ventilation air passage. It will be.
[0015]
[Embodiment]
Embodiments of the present invention will be described with reference to the drawings. 1 to 4 show the first embodiment, FIGS. 5 and 6 show the second embodiment, FIG. 7 shows the third embodiment, FIG. 8 shows the fourth embodiment, and FIGS. 9 and 10 show the fifth embodiment. Each embodiment is shown.
[0016]
A first embodiment shown in FIGS. 1 to 4 will be described. As shown in FIG. 1, the support metal fitting 1a is composed of a support metal fitting body 10 and a thermal expansion material holding member 30a. The heat expansion material holding member 30a is attached to the support metal fitting body 10 as shown in FIG. . First, the support bracket body 10 is provided with an insertion recess 12 into which a non-combustible eaves ceiling 60 can be inserted, a ventilation passage 20 through which outside air passes, and a plurality of ventilation holes 26, 26,. And the support piece 25 formed.
[0017]
The insertion recess 12 is formed of a short piece 13 projecting obliquely downward and a long piece 14 projecting long, and the upper surface is formed in a substantially square shape. Thus, a lower piece 16 that is folded back to the upper surface and extends horizontally is formed, and the short piece 13, the long piece 14, the first hanging piece 15, and the lower piece 16 constitute an insertion recess 12.
[0018]
An end portion of the lower piece 16 on the side opposite to the first hanging piece 15 is folded horizontally under the lower piece 16 via a hanging second hanging piece 17, and a bottom surface 18 slightly longer than the lower piece 16 is formed. Is done. Furthermore, a support piece 25 extending vertically through a bent piece 27 is formed at the end on the side opposite to the second hanging piece 17. The support piece 25 has a plurality of ventilation holes 26, 26,... In a row and a plurality of outer wall fixing holes 28, 28,. Further, a ventilation passage 20 is formed between the first vertical piece 15 and the support piece 25 through the ventilation holes 26, 26,.
[0019]
On the other hand, the thermal expansion material holding member 30a has a substantially L-shaped cross section, and forms a contact portion 31a that contacts the support metal fitting body 10 and a holding portion 35a that holds the thermal expansion material 50. The contact portion 31a has an insertion piece 32a, and the holding portion 35a has a pressing piece 36a for pressing the thermal expansion material 50. Then, the thermal expansion material holding member 30 a is attached to the support metal fitting body 10 by inserting and locking the insertion piece 32 a into the attachment hole 141 provided in the long piece 14 of the support metal fitting 10. Further, the thermal expansion material 50 is pressed and held by the pressing piece 36a of the holding portion 35a.
[0020]
FIG. 3 is a development view of the thermal expansion material holding member 30a before bending. Several notches 37a are provided in a horizontally long rectangular metal thin plate 11a. Then, the thin metal plate 11a is folded in half in the longitudinal direction so as to have a substantially L-shaped cross section with the broken line 38a as an axis. Moreover, the pressing piece 36a and the insertion piece 32a are formed by bending the convex part 39a formed by the notches 37a and 37a.
[0021]
Here, the thermal expansion material 50 only needs to have a performance capable of expanding without being burned by heat and closing the ventilation air passage 20. 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 1a is demonstrated. First, the thermal expansion material holding member 30a that holds the thermal expansion material 50 by the pressing piece 36a is attached to the support bracket main body 10a to complete the support bracket 1a. Next, as shown in FIG. 4, the support fitting 1 a is fixed to a predetermined location on the building outer wall 70 in accordance with the position of the ceiling plate 60. The fixing method is a method of fixing the outer wall fixing holes 28, 28,... Of the support piece 25 using a fastening material 71 such as a screw or a scissors, but is not limited thereto. And the ventilation structure of an eaves back ceiling can be comprised by inserting the edge part of the ceiling board 60 in the insertion recessed part 12 of the support metal fitting 1a.
[0023]
When a fire occurs in such a state, hot air passes through the ventilation passage 20 and hits the thermal expansion material 50, and the thermal expansion material 50 starts to expand. Then, the thermally expanded material 50 expanded as shown by the one-dot chain line in FIG. 4 seals the ventilation air passage 20. For this reason, it is possible to prevent a flame or spark from entering from the outside through the ventilation hole 26.
[0024]
A second embodiment shown in FIGS. 5 and 6 will be described. 2nd embodiment changes the attachment location of the thermal expansion material holding member 30b of the support metal fitting 1b. That is, the contact portion 31 b of the thermal expansion material holding member 30 b is attached to the first hanging piece 15 that forms the insertion recess 12 of the support metal fitting body 10. The attachment method inserts the insertion piece 32b of the thermal expansion material holding member 30b into the insertion hole 151 provided in the first hanging piece 15 and locks it. Also by this, the position of the thermal expansion material 50 is not different from the case of the first embodiment. Others are the same as in the case of the first embodiment, and thus the description thereof is omitted. In addition, the location which attaches a thermal expansion material holding member is not restricted to what is shown to 1st embodiment and 2nd embodiment.
[0025]
A third embodiment shown in FIG. 7 will be described. In the third embodiment, the thermal expansion material holding member 30a of the first embodiment is separated. That is, the thermal expansion material holding members 30c, 30c,... Of the implementation metal fitting 1c are independent of each other, and a plurality of thermal expansion material holding members 30c each provided with one pressing piece 36c and one insertion piece 32c are provided. It is attached to the long piece 14c. Others are the same as in the case of the first embodiment, and the description thereof is omitted.
[0026]
A fourth embodiment shown in FIG. 8 will be described. In the fourth embodiment, the thermal expansion material holding member 30b of the second embodiment is separated. That is, the thermal expansion material holding members 30d, 30d,... Of the implementation metal fitting 1d are independent of each other, and a plurality of thermal expansion material holding members 30d each having one pressing piece 36d and one insertion piece 32d are provided in the support metal fitting body 10d. The first hanging piece 15d is attached. Others are the same as in the case of the first embodiment, and the description thereof is omitted.
[0027]
A fifth embodiment shown in FIGS. 9 and 10 will be described. In the fifth embodiment, the method of attaching the thermal expansion material holding member 30d of the fourth embodiment is modified. That is, the insertion hole 142 is provided near the first hanging piece 15 of the long piece 14 constituting the insertion recess 12 of the support fitting main body 10 of the support fitting 1e, and the contact portion 31e of the thermal expansion material holding member 30e is inserted. Then, the inserted contact portion 31 e is attached to the first hanging piece 15. Others are the same as in the case of the first embodiment, and the description thereof is omitted.
[0028]
【The invention's effect】
The present invention has the following effects.
{Circle around (1)} Since the thermal expansion material holding member holding the thermal expansion material may be attached to the place where the thermal expansion material is required, the support bracket can be made a simple structure. For this reason, it leads also to cost reduction.
(2) Since the thermal expansion material holding member can be attached by inserting the insertion piece of the thermal expansion material holding member into the mounting hole of the support metal fitting body, the efficiency of the construction work of the support metal fitting can be improved.
{Circle around (3)} Since the thermal expansion material holding member is securely attached to the support metal fitting body, it is possible to prevent the positional displacement of the thermal expansion material held by the thermal expansion material holding member and to exhibit a desired fireproof performance.
(4) Since the thermal expansion material holding member positions the thermal expansion material above the ventilation hole, the ventilation passage can be reliably closed, and the fireproof performance is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.
FIG. 2 is a partially cutaway perspective view showing a first embodiment of the present invention.
FIG. 3 is a development view showing a thermal expansion material holding member according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a first embodiment of the present invention.
FIG. 5 is a partially cutaway perspective view showing a second embodiment of the present invention.
FIG. 6 is a sectional view showing a second embodiment of the present invention.
FIG. 7 is a partially cutaway perspective view showing a third embodiment of the present invention.
FIG. 8 is a partially cutaway perspective view showing a fourth embodiment of the present invention.
FIG. 9 is a partially cutaway perspective view showing a fifth embodiment of the present invention.
FIG. 10 is a sectional view showing a fifth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a Support metal fitting 10 Support metal fitting body 12 Insertion part 141 Mounting hole 20 Ventilation air passage 26 Ventilation hole 30a Thermal expansion material holding member 32a Insertion piece 36a Pressing piece 50 Thermal expansion material 60 Ceiling plate 70 Outer wall

Claims (3)

It is a ventilation structure of the eaves back ceiling where the ceiling plate on the back of the eaves is supported and fixed using a support bracket
In the support bracket body that has an insertion part for inserting the ceiling plate and a ventilation air passage that passes through the ventilation hole from the outside to the back of the ceiling, and is fixed to the outer wall,
A ventilation structure of the eaves-behind ceiling in which a thermal expansion material holding member that holds a thermal expansion material that expands due to heat and closes a ventilation air passage can be attached. The thermal expansion material holding member is a pressing piece that presses and holds the thermal expansion material, and
The ventilation structure of the eaves-behind ceiling according to claim 1, further comprising an insertion piece that is inserted into and locked into a mounting hole provided in the support metal fitting body. The ventilation structure of the eaves-behind ceiling according to claim 1 or 2, wherein the thermal expansion material holding member positions the thermal expansion material above the ventilation hole.

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