JPH11264603A - Fireproof damper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable it to be installed without needing large space, and surely shut a ventilation port at occurrence of fire. SOLUTION: A flat base board 1 is provided with a guide means 6, and this guide means 6 holds a shut-off plate which can shut off the ventilation port 1a made at the board 1 freely of sliding along the face of the board 1, between the open position to open the ventilation port 1a and the shut off position to shut it off. A lock member 4 made of shape memory alloy is fixed, which locks the shut-off plate, by being transformed in condition that the shut- off plate is shifted to open position and restores the shape of releasing the lock of the shut-off plate by being heated to the specified temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire damper device that normally closes a ventilation opening to allow ventilation when a fire occurs but delays the spread of fire in the event of a fire.

[0002]

2. Description of the Related Art Ventilation holes and ventilation ducts (hereinafter, typically referred to as ventilation holes) are always open, and ventilation and ventilation must be freely performed at any time. Otherwise, hot air or flames may travel to other locations through the ventilation holes, which may promote fire spread or combustion. Therefore, in the event of a fire, close the ventilation holes,
A fire damper device capable of preventing the spread of fire to other places through a ventilation hole is disclosed in, for example, JP-A-60-14859.
Various proposals have been made in JP-A-61-14054, JP-A-61-21238, JP-A-62-72527, JP-A-62-72531, and JP-A-62-72656.

However, in the conventional fire damper device, the shielding plate is rotatably supported at one end or an intermediate portion by a horizontal shaft, and the locking means holds the shielding plate at a position where the ventilation hole is opened. However, it is made of a shape memory alloy whose shape is memorized at high temperature, and it is deformed at room temperature to hold or lock the shielding plate at the open position, and when heated to a predetermined temperature due to fire or the like, locked. When the means recovers the memory shape, the closing plate rotates around the horizontal axis by its own weight to close the ventilation hole.

[0004]

As described above, each of the conventional fire dampers has a shut-off plate rotatably provided in the ventilation hole, and shuts off by restoring the shape of the locking means when a fire occurs. First, since the plate is configured to rotate by its own weight to block the ventilation hole, firstly, it cannot be installed unless it is a place where the rotational movement range of the blocking plate can be secured. Secondly, since the shielding plate is exposed to the ventilation holes in a standby state, oily smoke, soot and other sticky foreign substances adhere to the inner wall surfaces of the ventilation holes, which become obstacles and cause a fire. Even if the locking means is sometimes heated to a predetermined temperature, a situation may occur in which the closing plate cannot be reliably rotated to the closing position only by its own weight. An object of the present invention is to provide a fire damper device that eliminates the above-mentioned conventional disadvantages.

[0005]

In order to solve the above problems, a fire damper device according to the present invention is provided with guide means extending on a flat substrate in parallel with the plane thereof, and the guide means is formed on the substrate. A shielding plate capable of closing the vent, slidably held between an open position for opening the vent and a closing position for closing the vent, formed of a shape memory alloy, and A member that locks the shielding plate by being deformed while the shielding plate is moved to the open position, and recovers the shape in which the locking of the shielding plate is released by being heated to a predetermined temperature. A stop member is fixed to the substrate. According to the above configuration, it is possible to lock the shielding plate at the open position by deforming the locking member with the shielding plate moved to the open position. When the locking member is heated to a predetermined temperature due to a fire in a state where the blocking plate is locked at the open position, the memory shape is restored and the locking of the blocking plate is released. Thereby, the shielding plate slides to the shielding position along the surface of the substrate by its own weight. The blocking plate is slidable between the open position and the blocking position independently of the locking member. Therefore, an opening / closing test of the shielding plate can be optionally performed. The shielding plate is slidable between the open position and the shielding position along a plane parallel to the surface of the substrate. Accordingly, since the shielding plate does not require a large space to move from the open position to the shielding position, the fire damper device can be installed in a small space.

[0006] A cover material extending substantially parallel to the substrate and having a ventilation hole that matches the ventilation hole formed in the substrate is fixed to one of the front and rear surfaces of the substrate, and a cover material is provided between the substrate and the cover material. And a guide means for slidably guiding both ends of the shielding plate by grooves formed at both ends of the shielding plate accommodation portion, wherein the shielding plate accommodation portion is formed. It is also possible to adopt a configuration in which the shielding plate is slidably housed between the opening position and the shielding position in the portion. According to the above configuration, the shielding plate is housed in the shielding plate housing portion while the vent is open, so that foreign substances such as oily smoke, soot, steam, and the like hardly adhere. Therefore, it is possible to prevent the foreign matter from hindering the smooth opening and closing of the shielding plate. In the event of a fire, the vents can be reliably closed and the spread of fire is highly reliable.

The guide means is constituted by a groove formed along a straight line parallel to both sides of the ventilation hole of the substrate, and the closing plate slides both ends of the closing plate between the open position and the closing position. It is desirable to hold it movably. With such a holding structure of the shielding plate, the sliding of the shielding plate along the substrate can be stably and reliably performed with a simple and inexpensive configuration.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described based on the illustrated embodiment. FIG. 1 is a perspective view of the fireproof damper device according to the present invention in a state in which a closing plate is held at an open position, FIG. 2 is a front view of the fireproof damper device, FIG. It is a rear view.

A fire damper device D includes a steel base plate 1 formed in a rectangular flat plate shape, a steel cover member 2 having substantially the same shape and size as the base plate 1, and a steel shield formed in a rectangular flat plate shape. It comprises a closing plate (damper) 3 and a locking member 4 made of a shape memory alloy and attached to a predetermined position on the substrate. Hereinafter, each of the members 1 to 4 will be described in detail.

The substrate 1 has a rectangular vent 1a formed in the lower half thereof. The cover member 2 has a fixing portion 2a around the periphery, and by punching out a portion surrounded by the fixing portion 2a to the front side, a front rectangular recess 2b is formed with a uniform depth on the back side. A vent 2c having substantially the same shape and size as the vent 1a of the substrate is formed in the lower half of the recess 2b. Then, the cover member 2 is formed by spot welding or the like with the concave side of the concave portion 2b facing the substrate 1 and the fixing portion 2a being brought into close contact with the substrate 1 with the peripheral edge of the substrate 1 and the peripheral edge of the cover member 2 aligned. It is fixed to 1. As a result, a flat shielding plate accommodating portion 5 is formed between the substrate and the cover material by the concave portion 2b of the cover material 2, and the cover material 2 is provided at both left and right ends of the shielding plate accommodating portion.
And the substrate 1 form grooves 6 extending in parallel with each other on both sides of the ventilation ports 1a and 2c. Shield plate 3
Before the cover member 2 is fixed to the substrate 1, the cover plate 2 is housed in the concave portion 2 b of the cover member. Vent 1
a and 2c are slidably accommodated between an open position for opening the air vents 1a and 2c and a closing position for closing the air vents 1a and 2c. You will be guided. That is, the grooves 6 on both sides constitute guide means for guiding the shielding plate 3 slidably in the vertical direction. 1 and 2, reference numeral 7 denotes a hole that penetrates the substrate 1 and the cover member 2, and is used to pass a nail or a wood screw for fixing the fire prevention damper device D to a building. The number and positions of the holes 7 are determined as necessary.

The locking member 4 is formed in a strip shape from a shape memory alloy storing a linear shape at a predetermined temperature at which a fire can be reliably detected, for example, at about 70 ° C. Is fixed to the cover member 2 in a state of being suspended down to the upper portion of the ventilation port 2c. The mounting structure of the locking member 4 to the cover member 2 is not particularly limited. The example shown in the drawing will be described in detail. The upper end of the locking member 4 is attached to a positioning projection 2d formed by cutting and raising substantially at the center of the upper half of the cover member 2 in the width direction or formed and fixed by a separate member. The part is abutted and stopped, and is fixed by caulking one or more fastening members 2e similarly formed or fixed to the cover member 2 below the projection 2d. The lower portion of the locking member 4 can be bent inward of the ventilation holes 2c, 1a with a fingertip or the like.

Then, the lower part of the locking member 4 is moved in a state in which the shielding plate 3 is pushed up and accommodated in the shielding plate accommodation part 5 by hand, that is, as shown in FIG. By pressing and bending in the direction of the ventilation holes 2c, 1a, the shielding plate 3 can be locked at its open position.
1 to 3 show this state. Cover material 2
When the protrusion 2f projecting to the front side is provided at the upper end of the ventilation hole 2c, the radius of curvature of the locking member 4 at the time of bending becomes large, so that the locking member 4 formed of a shape memory alloy is broken. Can be prevented, and it is possible to prevent the closing plate 3 from being deformed due to excessive force.
A situation in which a smooth fall due to the weight of the shielding plate is not hindered does not occur.

In the above-described fire damper device, the substrate 1 and the cover member 2 are attached to the outer wall or indoor partition wall of a building so as to be along a vertical plane, and are used as ventilation holes of a ventilation device or a heat exhaust device. Then, when hot air, high-temperature gas or flame approaches or blows due to a fire or the like, and the locking member 4 is heated to a predetermined temperature, the locking member 4 recovers the memory shape and the dotted line in FIG. As shown by, it returns to a straight line and retracts outward from the ventilation ports 1a and 2c. For this reason, the locking member 4 which has been holding the blocking plate 3 at the open position until then releases the locking, and the blocking plate 3 is moved to the blocking position along the guide means (groove 6) by its own weight. Fall. Therefore, the ventilation holes 1a, 2c of the substrate 1 and the cover member 2 are blocked, so that hot air, high-temperature gas or flame cannot pass through the ventilation holes 1a, 2c.

In the above-mentioned embodiment, the shielding plate 3 is usually formed by the substrate 1 and the cover member 2.
, So that sticky foreign substances such as steam, oil smoke, soot and the like contained in the air passing through the ventilation ports 1a and 2c are prevented from adhering to the shielding plate 3. When the stop member 4 is restored to the shape in which the lock is released, the closing plate 3 is under its own weight only, without being obstructed by foreign matter.
There is an advantage that it falls to the shielding position smoothly and reliably.

However, if the air passing through the vents 1a and 2c does not contain a highly sticky substance due to the place where the fireproof damper device is installed or the object to be mounted, the board 1 contains a shielding plate housing. It is not necessary to provide the guide plate 5 and a simple structure in which only the guide means for slidably guiding the closing plate 3 from the open position to the closing position, for example, only grooves or protrusions are provided on the substrate 1. Can be. In that case, the locking member 4
Is mounted directly on the surface of the substrate 1 opposite to the shielding plate 3.

Next, an example in which the above-described fire damper device D is applied to a ventilation device attached to an outer wall for attic ventilation of a building will be described with reference to FIGS. 5 and 6. In this case, the fire damper device D is applied to the outdoor side surface of the outer wall 101 in a state where the ventilation holes 1a and 2c are aligned with the openings 102 serving as ventilation holes formed near the eaves of the outer wall 101. Then, screws or nails are screwed or driven into the outer wall 101 from the holes 7 formed on the right and left sides of the cover member 2 and the substrate 1 to be fixed to the building. In this case, as shown in FIG. 3 and FIG. 5, as shown in FIG. 3 and FIG. By attaching the upper and lower ridges 1b and 1c to the upper and lower sides of the opening 102 of the outer wall when attaching the fire damper device to the outer wall 101, the fire damper device can be easily positioned. Can be stably and reliably performed, and therefore, the mounting strength of the fireproof damper device can be remarkably improved.

When the fireproof damper device D is installed near the eaves on the outer wall of the building for ventilation in the attic, a plurality of fireproof dampers D are installed at regular intervals in the left-right direction as shown in FIG. In FIG. 5, reference numeral 103 denotes a roof material, 104 denotes a nose lumbar, and a first water return plate 105 formed of a thin metal plate is fixed to the outdoor side surface thereof.
5 is bent toward the outer wall 101 below the second water return plate 106 extending from the lower side of the opening 102 to the outdoor direction of the outer wall 101 below the lower end of the fire damper device D. And the second return plate 106
Above the first water return plate 105, a third water return plate 107 extending toward the outer wall 101 is fixed to the back surface of the first water return plate 105, and is bent into a substantially S shape by these water return plates 105a, 106, and 107. The ventilation path 108 is formed. This prevents outdoor rainwater from entering through the opening 102 and prevents outdoor hot air or flame from easily reaching the opening 102. Note that an eaves gutter is usually attached below the lower end of the roofing material 103, but is omitted in FIG.

In the above-described embodiment, the substrate 2 is mounted along a vertical plane.
When the substrate 1 is unlocked by the locking member 4,
The initial object can also be achieved when the shielding plate 3 in the open position is mounted along an inclined surface that can move to the shielding position along the guide means by its own weight. Also,
In the present invention, since the biggest feature is that the shielding plate moves along the plane to block the opening or the vent, the direction in which the shielding plate moves to the shielding position is the vertical direction, the inclination. Not only in the direction but also in the horizontal direction, a biasing means for constantly biasing the shielding plate in the closing direction is provided, and when the locking member releases the locking, the closing means closes the shielding plate. It can also be configured to move to a position.

In the above embodiment, the cover member is fixed to the front surface of the substrate, and the locking member is attached to the cover. However, the cover member may be attached to the rear surface of the substrate.
The locking member may be attached to the substrate.

[0020]

As described above, according to the first aspect of the present invention, the shielding plate is slidable between the open position and the shielding position along a plane parallel to the surface of the substrate. Therefore, a large space is not required for moving the shielding plate. Therefore, the fire damper device according to the present invention can be installed in a small space.
Further, since the closing plate can slide between the open position and the closing position independently of the locking member, an open / close test of the closing plate can be optionally performed.

According to the second aspect of the present invention, since the shielding plate is housed in the shielding plate housing portion while the vent is open, foreign substances such as oily smoke, soot, steam, etc. are unlikely to adhere. Therefore, it is possible to prevent the foreign matter from hindering the smooth opening and closing of the shielding plate, and it is possible to reliably block the ventilation holes and the like particularly in the event of a fire, and the reliability of fire spread prevention is high.

Further, according to the third aspect of the present invention, the guide means is constituted by a groove formed along a straight line parallel to both sides of the ventilation hole of the substrate, and the shielding plate has both ends in the open position. Since the groove is slidably held between the closing position and the groove, the structure is simple, so that inexpensive manufacturing is possible, and the sliding of the closing plate along the substrate is performed stably and reliably. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a closing plate of a fire damper device according to the present invention is held at an open position.

FIG. 2 is a front view of the fire prevention damper device.

FIG. 3 is a longitudinal sectional view of the same.

FIG. 4 is a rear view of the same.

FIG. 5 is a cross-sectional view of a case where the fire prevention damper device according to the present invention is applied to a ventilation device for attic ventilation.

FIG. 6 is a front view taken along line AA of FIG. 5 before a nose tip lumbar is attached.

[Explanation of symbols]

 D Fireproof damper device 1 Substrate 1a Vent 2 Cover material 2a Fixed part 2b Depression 2c Vent 3 Sealing plate 4 Locking member 5 Sealing plate housing 6 Groove (guide means) 101 Outer wall 102 Ventilation opening 103 Roof material

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[Procedure amendment]

[Submission date] May 27, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art Ventilation holes and ventilation ducts (hereinafter, typically referred to as ventilation holes) are always open, and ventilation and ventilation must be freely performed at any time. Otherwise, hot air or flames may travel to other locations through the ventilation holes, which may promote fire spread or combustion. Therefore, in the event of a fire, close the ventilation holes,
Fire damper device is capable of preventing the spread of fire to elsewhere through the ventilation holes, for example, real HirakiAkira 60-14859,
Real HirakiAkira 61-14054, real HirakiAkira 61-21238, real <br/> HirakiAkira 62-72527, real HirakiAkira 62-72531, have been proposed in such as real HirakiAkira 62-72656.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Junichi Takahashi 2-7-23 Kiba, Koto-ku, Tokyo

Claims (3)

[Claims] 1. A flat substrate is provided with guide means extending parallel to the plane of the substrate, and said guide means is provided with a shielding plate capable of closing a ventilation hole formed in said substrate. Between the open position to open and the closing position to close the ventilation port along the surface of the substrate so as to be slidable.The substrate is formed of a shape memory alloy, and the closing plate is A locking member that locks the shielding plate by being deformed while being moved to the open position and recovers a shape that releases the locking of the shielding plate when heated to a predetermined temperature is fixedly attached. Become a fire damper device. 2. A cover material having a vent extending substantially parallel to the substrate and having a vent that matches a vent formed in the substrate is fixed to one of the front and back surfaces of the substrate. A shielding means is formed between the cover member and the cover member, and guide means for slidably guiding both end parts of the shielding plate with grooves formed at both end parts of the shielding board accommodation part are provided. 2. The fireproof damper device according to claim 1, wherein the shielding plate is slidably accommodated in the shielding plate housing between an opening position and a shielding position. 3. The guide means comprises a groove formed along a straight line parallel to both sides of a vent formed in the substrate,
The fireproof damper device according to claim 1, wherein both ends of the shielding plate are slidably held in the groove between the open position and the closed position.