JP2001020408A - Ventilating and fire-preventive structure of eave soffit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilating and fire-preventive structure of an eave soffit necessitating no replacement of a component of a fire damper, but permitting reuse thereof. SOLUTION: In a ventilating and fire-preventive structure of an eave soffit 21 for ventilation and fire-preventive shielding of the back side 29 of eaves by a fire damper 10, the fire damper 10 is provided with a fixed plate 102 and a slide plate 11 put on each other and the slide plate 11 is positioned by a spring 13 and a shape memory alloy spring 12 provided in the opposite end parts in the sliding direction. The respective ventilation holes 103 and 111 of the fixed plate 102 and the slide plate 11 are positioned normally at the same positions, and when a fire breaks out, the shape memory alloy spring 12 operates to make the slide plate 11 shield the ventilation holes 103 of the fixed plate 102, at a temperature of 90 deg.C, while the slide plate 11 is made to return to the normal position at a temperature of 50 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fire protection structure for eaves.

[0002]

2. Description of the Related Art The eaves of buildings in a semi-fire prevention area are required to be finished to a fire prevention specification. Conventionally, as shown in FIG. 4, normal eaves ventilation is performed by using a gap 4 between the eaves 21b and the outer wall 20.
It is ventilated using 0. In the semi-fire prevention area, the gap 40 is closed by preparing a spacer 33. As for the ventilation, a part of the eaves 21b is cut out, and a fuse type fire damper 30 provided with a ventilation hole is separately attached to perform the eaves ventilation.

[0005] As shown in FIG.
Is mounted on the eaves 21b at predetermined intervals by processing a steel plate having a thickness of a fireproof specification and forming an outer periphery into a flange shape. A slide plate 31 whose one end is supported by a bias spring 32 is provided on the outer surface of the bottom of the fire prevention damper 30. The other end of the slide plate 31 is provided with a fuse 33 operating at 90 ° C. Ventilation holes 301 and 311 are formed in the bottom of the fire damper 30 and the slide plate 31, respectively. In a normal state, the ventilation holes 301 and 311 of the bottom of the fire protection damper 30 and the slide plate 31 are set so that the hole positions thereof coincide with each other, and the eaves 21b are ventilated.

At the time of a fire, the fuse 33 is melted at 90 ° C., the bias spring 32 operates, and the slide plate 31 moves to shield the ventilation hole 301 at the bottom of the fire prevention damper 30. In addition, the operation standard of the fire prevention damper 30 is Ministry of Construction Notification No. 2563, which is closed at 90 ° C within one minute.
The standard is such that it will not operate for more than 5 minutes at 50 ° C.

[0005] As a conventional fire protection structure for eaves, Japanese Patent Application Laid-Open
No. -4157 is described. The above publication discloses a structure in which a ventilation fire prevention member is attached and fixed around the nose cover at the eaves. The ventilation fire prevention member is horizontally fixed to the lower end of the nose cover and has a ventilation opening behind the nose cover. A lower member having a ventilation opening in front of the ventilation opening of the upper member and a thermo-foaming material behind the ventilation opening. As a result of the provision of refractory material between the bottom and the upper member, construction can be performed easily and inexpensively, and in the event of a fire, the eaves vent is reliably shut off and fire is prevented by heat conduction to the eaves structure A highly reliable eaves ventilation fire protection structure is provided.

[0006] Japanese Patent Application Laid-Open No. 9-60226 discloses a fire damper for a ventilation building. In the above-mentioned publication, a base portion in which a plate surface provided with a ventilation hole is arranged so as to span a ventilation interval of a house, and the ventilation hole of the base portion is shieldably opposed to and parallel to the base portion at a ventilation interval. And a cover plate portion disposed above the cover plate portion, the cover plate portion being held by a leg connected to a projecting piece protruding from the cover plate portion and a receiving frame attached to the base portion by a heat-fusible fuse. In addition, it is supported downward by a spring to prevent the fire in the event of a fire from leaking out of the house through the ventilation space. It is structurally simple and does not hinder air exchange, and the roof slope varies depending on the construction site. It is a fire damper that can be easily handled even if it is.

[0007]

In each of the above publications, there is a problem that once the fuse of the fire prevention damper or the foam material has been activated, it cannot be used again unless parts such as the fuse are replaced. The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a ventilation fire protection structure for eaves that can be reused without replacing parts of the fire protection damper.

[0008]

According to a first aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky, wherein a ventilation damper provided on the eaves sky provides ventilation and fire protection for the back of the eaves. In the fire damper, a fixed plate and a slide plate each having a ventilation hole are provided so as to overlap each other, and the slide plate is positioned by a shape memory alloy actuator provided at at least one end in the slide direction. Normally, the ventilation holes of the fixed plate and the slide plate are positioned at the same position to ventilate the eaves from the eaves, and in case of fire, the shape memory alloy actuator operates to move the slide plate. Thus, the ventilation holes of the fixing plate are shielded.

According to a second aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky, wherein the fire protection damper provided on the eaves sky provides ventilation and fire protection for the back of the eaves. The damper is provided with a fixed plate and a slide plate in which ventilation holes are drilled, and the slide plate is positioned by springs and shape memory alloy springs provided at both ends in the sliding direction. By this, the ventilation holes of the fixed plate and the slide plate are positioned at the same position, and the back of the eaves is ventilated from the eaves. In the event of a fire, the shape memory alloy spring operates at 90 ° C to slide the slide plate. It is moved to block the ventilation holes of the fixed plate and returned to the normal position of the slide plate at 50 ° C.

According to a third aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky, wherein a fireproof damper is provided at a corner between a ceiling surface and an outer wall of the eaves sky.

According to a fourth aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky, wherein a fireproof damper is provided at a corner between a ceiling surface and an outer wall of the eaves sky, and the eaves sky is covered with fire protection without gaps. .

[0012]

According to a first aspect of the present invention, there is provided a ventilation fire protection structure for eaves heavens, wherein the fire prevention damper is provided with a fixing plate and a slide plate each having a ventilation hole superimposed thereon, and the slide plate is provided in the slide direction. It is positioned by the shape memory alloy actuator provided at least at one end.In normal times, the ventilation holes of the fixed plate and the slide plate are positioned at the same position, and the back of the eaves is ventilated from the eaves in case of fire. Since the shape memory alloy actuator operates to move the slide plate and block the ventilation holes of the fixed plate, the fire damper can be reused even after operation, eliminating the cost of replacing parts .

According to a second aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky according to the present invention, wherein the fire damper is provided with a fixing plate and a slide plate which are each provided with a ventilation hole, and the slide plate is provided in the slide direction. It is positioned by the springs provided at both ends and the shape memory alloy spring.In normal times, the positions of the ventilation holes of the fixed plate and the slide plate are positioned at the same position by the spring, and the back of the eaves is ventilated from the eaves. Then, in the event of a fire, the shape memory alloy spring operates at 90 ° C. to move the slide plate to cover the ventilation holes of the fixed plate and return to the normal slide plate position at 50 ° C. The fire damper can be reused even after operation, and the cost of replacing parts can be eliminated.

According to the third aspect of the present invention, since the fire damper is provided at a corner between the ceiling surface and the outer wall of the eaves, the fireproof damper is separately provided between the ceiling and the outer walls of the eaves. There is no need to provide a plate material for closing the corner, and the number of components of the plate material can be reduced.

According to a fourth aspect of the present invention, the fireproof damper is provided at the corner between the ceiling surface and the outer wall of the eaves, and the eaves are fireproofly covered with no gap. Fireproof finish with no gaps on the entire ceiling, and fireproof dampers can be installed in the semi-fireproof area just by adding fireproof dampers to the standard parts instead of spacers in the gap between the eaves and the outer wall. .

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an eaves section in which a fire damper of the present invention is provided on an eaves sky. FIG. 2 is a cross-sectional view showing an enlarged main part of eaves mounting of the fire protection damper.
FIGS. 3A and 3B are cross-sectional views of the fireproof damper for explaining the operation of the fireproof damper. FIG. 4 is a cross-sectional view showing an eaves portion where a conventional fuse-type fire protection damper is provided on an eaves sky. FIGS. 5A and 5B are cross-sectional views showing a conventional fuse-type fire protection damper. It is a top view.

As shown in FIG. 1, the fire protection damper 10 of the present invention is provided so as to close the eaves of a gap 40 between the eaves 21 and the outer wall 20 of the building. The eave heaven 21 is formed on the ceiling surface of the eave where the roof surface supported and formed by the inclined barb 28 protrudes from the outer wall 20. The roof surface is supported by a roof beam 26 provided above the outer wall 20 of the building, and an eaves gutter 25 is provided at the eaves. The eaves 21 are connected and supported to the building by eaves hanger 23, 24 and eaves 27.
The eaves top 21 is finished with an eaves top surface material 21a, and is formed by covering the back surface with a fireproof covering material 22.

FIG. 2 shows an enlarged view of a main part of a mounting portion of the fireproof damper 10. The fire damper 10 provided so as to close the eaves at the corners 40 of the eaves 21 and the outer wall 20 is formed by processing a steel plate into a box 101, and is attached to the eaves hanging bracket 24 and the outer wall 20. . The bottom surface of the box 101 is formed by a fixing plate 102, and a plurality of ventilation holes 103 are formed in the fixing plate 102 at equal intervals.

A slide plate 11 is provided on the inner surface of the box 101 so as to be inserted into a fixed plate guide 105. The slide plate 11 is configured to be able to slide on the fixed plate 102 so as to overlap with the fixed plate 102. A ventilation opening 104 is provided in the upper part of the box 101, and is opened to the upper part of the eaves back 29 so that outside air can flow in.

FIGS. 3A and 3B are longitudinal sectional views of the fire damper 10. FIG. Slide plate 11
As shown in FIGS. 3A and 3B, a shape memory alloy spring 12 and a spring 13 functioning as actuators are provided at both ends thereof, supported by shaft cores 12a and 13a. The shaft cores 12 a and 13 a are configured to be able to slide through end pieces of the slide plate 11.

FIG. 3A shows a normal state in which the fire damper 10 operates as a ventilation port. That is, the ventilation holes 103 of the fixed plate 102 and the ventilation holes 111 of the slide plate 11
Holes are located at the same position, and the outside air is ventilated.
The outside air can flow into the eaves back 29 from the upper ventilation port 104 via 11. In this state, since the temperature is normal, the slide plate 11 is pressed by the spring force of the spring 13.

FIG. 3B shows a state in which the slide plate 11 shields the ventilation holes 103 of the fixed plate 102 in the event of a fire. When the shape memory alloy spring 12 reaches 90 ° C., it expands and overcomes the spring force of the spring 13 to move the slide plate 11, and the plate surface of the slide plate 11
03 slides to the position where it is shielded. The moving distance of the slide plate 11 is a preset spring 13
And the length of expansion and contraction of the shape memory alloy spring 12.

Further, the temperature of the shape memory alloy spring 12 decreases and returns to its original state at 50 ° C. That is, the state returns to the state shown in FIG. The shape memory alloy spring 12 has an N type manufactured by Furukawa Electric Co., Ltd.
iTi shape memory alloys are preferred. Shape memory alloy spring 1
The compounding ratio of the alloy No. 2 can be determined by the set temperature.

As described above, the ventilation fire protection structure for eaves of the present invention has the ventilation holes 103,
A fixed plate 102 having a perforated hole 111 and a slide plate 11 are provided so as to overlap with each other. The slide plate 11 is provided with springs 13 provided at both ends in the sliding direction and a shape memory alloy spring 1.
2 and the ventilation holes 103 of the fixed plate 102 and the slide plate 11 by the spring 13 at normal times.
The holes 111 are positioned at the same position, and the eaves 21 are ventilated from the eaves 21 to the eaves back 29.
Operates at 90 ° C. to move the slide plate 11 to cover the ventilation holes 103 of the fixed plate 102 and to return to the normal position of the slide plate 11 at 50 ° C., so that the fire damper 10 can be operated even after the operation. Can be reused, and the cost of replacing parts can be eliminated.

In the vented fire protection structure for the eaves, the fire damper 10 is provided at the corner 40 between the ceiling of the eaves 21 and the outer wall 20, so that the corner of the eaves between the ceiling and the outer wall is separately provided. 40
There is no need to provide a plate member for closing the plate, and the number of parts of the plate member can be reduced.

Further, in the ventilation fire protection structure for the eaves, the fire damper 10 is provided at the corner 40 between the ceiling surface of the eaves 21 and the outer wall 20 and the eaves 21 are covered with the fire without any gap. Fireproof finish with no gap in the whole heaven,
An eaves structure that can be built in a quasi-fire prevention area can be obtained simply by attaching the fire protection damper 10 to the standard parts.

According to a first aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky according to the present invention, wherein the fire prevention damper is provided with a fixed plate having ventilation holes and a slide plate superimposed on each other, and wherein the slide plate is a slide plate. Positioned by a shape memory alloy actuator provided at at least one end in the direction,
Normally, the ventilation holes of the fixed plate and the slide plate are positioned at the same position, and the back of the eaves is ventilated from the eaves,
In the event of a fire, the actuator made of shape memory alloy operates to move the slide plate and block the ventilation holes in the fixed plate, so that the fire damper can be reused even after operation,
The cost of replacing parts can be eliminated.

According to a second aspect of the present invention, there is provided a ventilation fire protection structure for an eaves sky, wherein the fire damper is provided with a fixing plate having a ventilation hole and a slide plate superimposed on each other. It is positioned by the springs provided at both ends and the shape memory alloy spring.In normal times, the positions of the ventilation holes of the fixed plate and the slide plate are positioned at the same position by the spring, and the back of the eaves is ventilated from the eaves. Then, in the event of a fire, the shape memory alloy spring operates at 90 ° C. to move the slide plate to cover the ventilation holes of the fixed plate and return to the normal slide plate position at 50 ° C. The fire damper can be reused even after operation, and the cost of replacing parts can be eliminated.

According to the third aspect of the present invention, since the fireproof damper is provided at the corner between the ceiling surface and the outer wall of the eaves, the fireproof damper is separately provided between the ceiling and the outer walls of the eaves. There is no need to provide a plate material for closing the corner, and the number of components of the plate material can be reduced.

According to the fourth aspect of the present invention, the fireproof damper is provided at the corner between the ceiling surface and the outer wall of the eaves and the eaves are covered with the fire without any gap. Fireproof finish with no gaps on the entire ceiling, and fireproof dampers can be installed in the semi-fireproof area just by adding fireproof dampers to the standard parts instead of spacers in the gap between the eaves and the outer wall. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an eaves portion where a fire damper of the present invention is provided on the eaves.

FIG. 2 is a cross-sectional view showing an enlarged main part of mounting a fireproof damper on an eaves ceiling.

FIGS. 3 (a) and 3 (b) are cross-sectional views of the fire protection damper for explaining the operation of the fire protection damper.

FIG. 4 is a cross-sectional view showing an eaves sky where a conventional fuse-type fire damper is provided on the eaves sky.

FIGS. 5A and 5B are a cross-sectional view and a plan view showing a conventional fire damper.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 fire prevention damper 11 slide plate 12 shape memory alloy spring 13 spring 20 outer wall 21 eaves 21 a eaves top panel material 22 fireproof covering material 23 eaves hanging bracket 24 eaves ceiling fixture 25 eaves 26 roof beam 27 eaves beam 28 bark 29 Back of eave 30 Conventional fire damper 31 Conventional slide plate 32 Bias spring 33 Fuse 34 Ventilation hole

Claims (4)

[Claims] 1. A ventilation fire protection structure for an eaves sky, wherein ventilation of the eaves is performed and a fire shield is provided by a fire protection damper provided on the eaves sky, wherein the fire damper has a fixed plate and a slide, each having a ventilation hole perforated. The slide plates are provided in an overlapping manner. The slide plate is positioned by a shape memory alloy actuator provided at at least one end in the slide direction. Normally, the positions of the ventilation holes of the fixed plate and the slide plate are the same. Vented from the eaves to the back of the eaves, and in the event of a fire, the shape memory alloy actuator is activated to move the slide plate and block the ventilation holes in the fixed plate. Construction. 2. A ventilation fire protection structure for an eaves sky, wherein ventilation of a back of the eaves and a fire protection are performed by a fire protection damper provided on the eaves sky, wherein the fire prevention damper has a fixed plate and a slide each having a ventilation hole. The slide plates are provided by being overlapped with each other, and the slide plate is positioned by springs provided at both ends in the slide direction and a shape memory alloy spring. The position is positioned at the same position, venting the eaves from the eaves to the back of the eaves. In the event of a fire, the shape memory alloy spring operates at 90 ° C to move the slide plate and shield the ventilation holes in the fixed plate. ° C
The vented fire protection structure of the eaves sky, which is returned to the normal slide plate position. 3. The ventilation fire protection structure according to claim 1, wherein the fire prevention damper is provided at a corner between the ceiling surface and the outer wall of the eaves. 4. The ventilation fire protection structure according to claim 1, wherein the fire prevention damper is provided at a corner between the ceiling surface and the outer wall of the eaves.