JP2002106129A - Eaves structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eaves structure of a building capable of operating a longer damper, quickly corresponding to a fire to cut off a vent hole at an initial stage, checking the spread of the fire, eliminating a bird protection net and detaching an eaves soffit panel. SOLUTION: The eaves structure of the building is so constituted that a ventilating ventiduct S2 is provided to the inside of the rear end section of the eaves soffit panel 7 along the longitudinal direction of a roof beam 2, at the same time, the rear end section of the eaves soffit panel 7 is bent to an exterior wall side in a Z-shape, a plurality of vent holes 722 are arranged to the bent rise section 721 in the longitudinal direction of the roof beam 2 at regular intervals, a fire resisting damper 53a is energized to the inside of the upper end of the rise section 721 in a rotatable manner and that the fire resisting damper 53a is pivoted to close the vent holes 722 in case of fire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating space formed between an eaves ceiling panel and an outer wall for attic ventilation of a building, which is cut off when a fire occurs to prevent or delay the spread of fire. About eaves structure with function.

[0002]

2. Description of the Related Art Generally, ventilation holes and ventilation ducts provided in a building body are provided for ventilation and ventilation, and must be kept open at all times. However, if it is left open even when a fire occurs, hot air or flame may be drawn in from the ventilation holes or ventilation ducts, causing the fire to spread and promoting fire spread.

[0003] For this reason, various damper devices have been proposed which normally function as ventilation holes and shut off the fire in case of fire. For example, in Japanese Patent Application Laid-Open No. 11-159018, a vent formed between an eave ceiling and a wall is usually opened for ventilation, and the vent can be shut off by a damper. To the spring,
The stopper is used to restrict the damper from rotating in the blocking direction, and the vent is opened.In the event of a fire, the stopper melts due to heat and the regulation is released, causing the damper to rotate and the damper to overlap the vent. There is disclosed a ventilation structure for an eaves ceiling in which a ventilation opening is closed.

By the way, in the case of the ventilation structure of the eave ceiling,
Since the melting temperature of the stopper is relatively high, the damper is difficult to operate in the early stage of the fire, and the stopper does not melt immediately even when the temperature around the stopper reaches the melting temperature. Therefore, a sufficient fire spread prevention effect cannot be expected.

[0005] To solve this problem, the applicant of the present invention has studied the following eaves structure of a building.

More specifically, as shown in FIG. 5, a grooved roof beam 2 extending horizontally below the eaves tip of a folded type roofing material 1 and supporting the eaves tip, A rear end 31 is fixed to the front surface of the beam 2 with bolts and nuts, and a support arm 3 protruding horizontally forward and an outer wall material 4 stretched vertically.
Thus, a ventilation gap S is formed at the base of the eave, and the eave structure of the building is provided with a fire damper 5 along the longitudinal direction of the roof beam 2 in the gap S. The tight frame 21 is fixed to the upper flange of the roof beam 2 with bolts.

As shown in FIG. 6, the fire damper 5 has a section L fixed to the lower surface of the support arm 3 by rivets.
Elongated damper blades 5 having an L-shaped cross section, which are rotatably attached to a long mounting bracket 51 having a L-shape via hinges 52.
3 and a stopper 54 made of a shape memory alloy for locking the front end side of the damper blade 53. The stopper 54 comes off when the temperature rises or a fire occurs, and the damper blade 53 is used for ventilation. Is configured to close the opening S1. Note that one end of the stopper 54 is also fixed to the lower surface of the support arm 3.

A parapet 6 is fixed to the tip of the support arm 3 via a bracket 32. Reference numeral 7 denotes an eaves panel, which is formed from a rock wool plate 71 and a decorative steel plate 72, and is provided substantially horizontally so as to cover the lower side of the support arm 3. In the eaves top panel 7, the front and rear ends of the decorative steel plate 72 are fixed to the lower side of the support arm 3 via long receiving brackets 8a and 8b, respectively. The eaves gutter 9 is disposed between the roof beam 2 and the parapet 6 in parallel with them, and is fixed to the upper surface of each support arm 3 via a metal fitting 91.
92 is a front cover.

[0009]

However, the eave structure of the building shown in FIG. 5 requires a mounting bracket 51 for rotatably mounting the damper wing material 53, and furthermore, a ventilation clearance at the eave base. Since the upper part of S is open,
In order to prevent a bird from entering and forming a nest, it is necessary to install a bird net S1 or the like as shown in FIG.
Costly and expensive. In addition, since the outer wall material 4, the fire damper 5 and the bird net S1 are independent members, there is a tendency that the accommodation state varies, and the fire damper 5 may not completely close the upper opening of the ventilation gap S. There is. Also, as shown in FIG.
Since the rear end side is fixed to the receiving bracket 8b by rivets in the horizontal direction, it is difficult to remove the eaves ceiling panel 7.

It is an object of the present invention to actuate a long damper, to quickly react to a fire, to shut off a vent at an early stage, and to prevent or delay the spread of a fire. It is an object of the present invention to provide an eaves structure that does not require a separate member for attaching a material and does not require installation of a bird net or the like.

[0011]

According to the first aspect of the present invention, there is provided an eaves structure in which a ventilation gap is provided between an eave ceiling and an outer wall, and a fireproof damper is provided to close the ventilation gap when a fire occurs. In the above, the support member for suspending and supporting the eaves ceiling or the end face of the eaves ceiling itself constitutes a base of the fireproof damper.

As described above, since the supporting member for suspending and supporting the eaves ceiling or the end face of the eaves ceiling itself constitutes the base of the fireproof damper, a separate member for attaching the fireproof damper as in the related art is required. No cost increase.

For example, a ventilation passage for ventilation is provided inside the rear end side of the eaves ceiling panel forming the eaves ceiling, and a plurality of ventilation openings are provided at the rising portion of the eaves ceiling panel constituting the ventilation passage. The fire protection damper is pivotally biased and held on the inner surface of the upper end of the rising part in a rotatable manner. Spreading of time can be prevented or delayed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a main part of a first embodiment of the eaves structure of a building according to the present invention, and FIG. 2 is a partial perspective view showing a main part of an eaves ceiling panel in FIG.

In the case of the first embodiment, the parts other than the mounting structure near the ventilation gap S formed by the eaves ceiling panel 7 fixed to the support arm 3 via the receiving bracket and the outer wall 4 are the same. Since the structure is basically the same as that of the eaves structure of the building shown in FIGS. 5 and 6, the same portions are denoted by the same reference numerals and description thereof will be omitted.

In the first embodiment, as shown in FIG. 1, the decorative steel plate 72 forming the eaves panel 7 extends from the rear end of the rock wool plate 71 to the outer wall material 4 side, and faces upward. Is bent at a right angle to the outer wall material 4 side again, so that a ventilation hole is provided between the rock wool plate 71 and the rising portion 721 of the decorative steel plate 72 along the longitudinal direction of the roof beam 2. Is provided. As shown in FIG. 2, a plurality of horizontally-long rectangular ventilation holes 722 are formed in the rising portion 721 in the longitudinal direction of the roof beam 2 at intervals. In this case, the rising part 721 of the decorative steel plate 72 forming the eaves panel 7 also serves as the base of the fireproof damper.

A fire damper 53a made of a long metal plate having a bent end is disposed on the inner surface of the upper end of the rising portion 721. Specifically, as shown in FIG. 2, one side end is fixed to a hinge 52 fixed at a predetermined position so as to be rotatable, and is always fixed to the lower surface of the support arm 3 with a rivet by a spring (not shown). Long bracket 8
B is locked by the stopper 54 fixed to the
Is urged to rotate in a direction to cover. And
When rotated, one side of the damper is raised 721
It is constituted so that it may contact the inner surface of. The lower surface of the other end of the receiving fitting 8B is in contact with a sheet-like watertight material attached to the upper end surface of the outer wall material 4.

In the eaves panel 7, the front and rear ends of the decorative steel plate 72 are fixed to the lower side of the support arm 3 via long receiving metal fittings 8a and 8B, respectively. In the case of the first embodiment, the horizontal portion 723 of the decorative steel plate 72 located on the outer wall material 4 side
Are fixed to the lower surface of the receiving fitting 8B upward with rivets.

The stopper 54 is made of a shape memory alloy, usually has a curved shape, and has the property of restoring to a straight shape at high temperatures. In the curved state, the stopper 54 is set so as to be engaged with the bent end portion of the fire damper 53a to hold the fire damper 53a at the rotation restricting position. In addition, the stopper 54 may be any as long as it operates between 50 and 100 ° C.

According to the above configuration, the fire prevention damper 53a, which is normally indicated by a solid line in FIG. 1, is locked to the stopper 54 and is in the rotation restricting position, so that the ventilation passage S2 for ventilation is opened. Ventilation on the back side of the cabin is performed through the ventilation path S2 and the plurality of ventilation ports 722 of the rising portion 721.

Then, when a fire occurs and the temperature inside the house rises to a certain temperature, the stopper 54 is restored to a straight shape, whereby the engagement with the fire damper 53a is released, and the fire damper 53a is released. As a result of rotation in the counterclockwise direction by the spring and its own weight, one surface of the fire prevention damper 53a abuts on the inner surface of the rising portion 721 as shown by the broken line in FIG. 1, and the ventilation passage S2 for ventilation is isolated from the outside. Is done. As a result, the ventilation part communicating with the back of the hut is reliably shut off by the fire prevention damper 53a, so that it is possible to prevent fire from spreading or delay the spread of the fire.

The rising portion 721 of the decorative steel plate 72
Constitutes a base on which the fireproof damper 53a is rotatably held, so that no separate member for holding the fireproof damper 53a is required, and the cost does not increase.

Further, the rising portion 72 of the eaves panel 7
Since the horizontal portion 723 bent from the upper end of 1 to the outer wall 4 side can be fixed to the metal fitting 8B by rivets upward, the eaves panel 7 can be removed by removing the rivet. Further, since the upper part of the ventilation gap S is covered with the long receiving metal member 8B, there is no need to install a bird net or the like above the ventilation gap S, and the cost does not increase.

The fireproof damper 53a is provided on the eaves panel 7.
Because it is arranged inside, the aesthetic appearance of the eaves part is good.

FIG. 3 is a sectional view of a main part of a second embodiment of the eaves structure of a building according to the present invention, and FIG. 4 is a partial perspective view showing a main part of a fireproof damper in FIG. The eaves structure of this embodiment is provided with a fire damper function on the back of the eaves of the roof balcony.

In FIG. 3, reference numeral 7A denotes an eaves ceiling panel made of a hard cement board containing a piece of wood, and a frame B1 having a framed structure constituting a balcony B has a field edge B2 and a fire damper function incorporated therein. Support member B3 having a U-shaped cross section
And is fixed with a screw nail. In this case, the support member B3 has a fire protection damper built therein. B4 is a balcony handrail outer wall, B5 is a cosmetic mall material,
B6 is a molding receiving bracket, and B7 is an eaves ceiling cut edge made of decorative steel plate. In addition, the eave sky view cutting edge B7 and the eave sky panel 7 on the indoor side
A ventilation gap S exists between the air gap A.

As shown in FIG. 4, the supporting member B3 is composed of a supporting member main body B31 having a U-shaped cross section and the supporting member main body B31.
L-shaped long rail member B32 fixed to the upper and lower ends of one side of the web, and a long fireproof damper 53b movably mounted between the two rail members B32 in the longitudinal direction.
And a stopper 54 and a coil-shaped spring body B33. A plurality of vertically long rectangular ventilation holes 311 and 531 are formed in the longitudinal direction at intervals in the web and the fireproof damper 53b of the support member body B31.

In a normal state, as shown in FIG. 4, the air holes 311 of the support member main body B31 and the air holes 531 of the fire prevention damper 53b correspond to the web surface of the support member main body B31. The tip of the fixed stopper 54 is locked to the inner edge of the ventilation hole 531 at one end of the fire protection damper 53b, and the other end of the fire protection damper 53b is connected to a spring B3.
3 and the locking by the stopper 54 is released, the fire damper 53b moves in the direction of the spring body B33, and the ventilation holes 311 of the support member main body B31 are closed.
It is held so as to be closed at 3b. Stop 54
Is made of a shape memory alloy, similarly to the first embodiment, and usually has a bent end, and has a property of being restored to a straight shape at high temperatures. In addition, a stopper (not shown) is provided on the web surface of the support member body B31 on the side of the spring body B33 to regulate the moving distance of the fire prevention damper 53b.

According to the above configuration, the fire damper 5 is normally used.
3a is locked to the stopper 54 and is in the movement restricting position,
Both ventilation holes 311 and 531 are opened, and ventilation is performed through the ventilation gap S and the ventilation holes 311 and 531 between the eave sky viewing edge B7 and the eave sky panel 7A.

Then, when a fire occurs and the temperature inside the house rises to a certain temperature, the stopper 54 is restored to a straight shape, the engagement with the fire damper 53a is released, and the fire damper 53a is turned off. It is pulled by the spring body B33 and moves in the direction of the arrow, and each ventilation hole 311 of the support member main body B31 is closed by the fireproof damper 53b. As a result, the ventilation through the ventilation gap S is reliably blocked, so that the spread of the fire can be prevented or the spread of the fire can be delayed.

In the second embodiment, the fire damper 53a
Although the support member B3 having the built-in structure is disposed on the indoor side, the support member B3 may be disposed on the outdoor side with the rim B2 on the indoor side.

[0032]

According to the first aspect of the present invention, since the supporting member for suspending and supporting the eaves ceiling or the end face of the eaves ceiling itself constitutes the base of the fireproof damper, the fireproof damper is attached as in the prior art. No additional member is required, and the cost does not increase.

Further, a ventilation passage for ventilation is provided inside the rear end side of the eave ceiling panel constituting the eave ceiling, and a plurality of ventilation holes are provided at a rising portion of the eave ceiling panel constituting the ventilation passage. When a fire occurs, the fire prevention damper rotates and closes the multiple vents by holding the fire prevention damper rotatably biased on the inner surface at the upper end of the rising part. Can be prevented or delayed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a first embodiment of an eaves structure of a building according to the present invention.

FIG. 2 is a partial perspective view showing a main part of the eaves panel in FIG.

FIG. 3 is a sectional view showing a main part of a second embodiment of the eaves structure of a building according to the present invention.

FIG. 4 is a partial perspective view showing a main part of the eaves panel in FIG. 3;

FIG. 5 is a partial sectional view showing a conventional eaves structure of a building.

FIG. 6 is an enlarged sectional view showing a main part of FIG.

[Explanation of symbols]

 S Ventilation gap S2 Ventilation path 1 Roof material 2 Roof beam 3 Support arm 4 Outer wall material 5, 53a Fire protection damper 52 Hinge 54 Stopper 6 Parapet 7 House top panel 71 Rock wool plate 72 Decorative steel plate 721 Rise 722 Vent 8a, 8b, 8B Long receiving bracket

Claims (1)

[Claims] An eaves structure in which a ventilation gap is provided between an eaves ceiling and an outer wall, and a fireproof damper for closing the ventilation gap when a fire occurs is provided. An eaves structure wherein the end face of the ceiling itself constitutes the base of the fire damper.