JPH07279554A - Ventilating device with fireproof damper - Google Patents

Abstract

PURPOSE:To provide a ventilating device with a fireproof damper which is not closed erroneously and facilitates reset. CONSTITUTION:A fireproof damper 20 is connected in a turnable manner on a body having a ventilating hole 13. On the room inside surface of the fireproof damper 20, a hook 41 (engagement part) which is formed by cut-erecting a plate member 40 is formed. On the supporting mechanism 50 of the body 10, a shaft 60 (stopper member), first spring 65, and the second spring 68 made of shape memory alloy are installed. The shaft 60 is shiftable in parallel to the turning shaft of the fireproof damper 20, and is projected by the force of the first spring 65, and engages the hook 41, and holds the fireproof damper 20 at an opening position. When the environmental temperature rises up to the abnormal level, the second spring 68 is compressed, and retreats the shaft 60 from the engagement position. Accordingly, the fireproof damper 20 is shifted toward the body 10, by the spring 35 for damper and the gravitational force, and closes a ventilating hole 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device with a fire damper installed on the eaves of a house.

[0002]

2. Description of the Related Art A ventilation device for ventilating a house is installed on the eaves of a house. This ventilation device includes a plate-shaped main body having a large number of ventilation holes, and a fireproof damper arranged on the house side of the main body. This fire-damping damper is for closing the ventilation hole and avoiding burning in the event of a fire in the next house, and it is necessary to automatically close it when the environmental temperature rises abnormally. The conventional fire damper consists of a plate with a large number of ventilation holes of the same shape as the main body, and it is in contact with the main body and is slidable. The fire damper is biased by a spring toward a closed position (that is, a position where the ventilation hole of the main body does not coincide with the ventilation hole of the fire damper). The fire damper and the body are connected by a fuse, and the fuse opens the fire damper against the spring (that is, the ventilation hole of the body and the ventilation hole of the fire damper are aligned). To maintain. Then, when the environmental temperature becomes abnormally high due to the fire of the neighboring house, the fuse is blown and the spring force closes the fire-proof damper. As another conventional ventilation device, there is one in which a fire damper is rotatably connected to a main body having a ventilation hole. This ventilator also uses the above spring and fuse.

[0003]

In the above ventilation device with a fire damper, the force of the spring is constantly applied to the fuse, so that the fuse is fatigued and cut, and there is no abnormal rise in the environmental temperature, but the fire The damper sometimes closed. Further, when the fuse is blown due to fatigue or is blown due to an abnormal rise in environmental temperature, it cannot be reused and must be replaced, which is troublesome.

[0004]

In order to solve the above problems, in the ventilator with a fire damper according to claim 1, (a) a main body having a ventilation hole, and (b) an indoor side of the main body. A fire damper having one side edge rotatably connected to the body and having a locking portion, (c) a damper spring for urging the fire damper toward the body, and (d) the body. A stopper member that is movably supported by the locking member and that keeps the fire damper at an open position away from the main body by locking the locking portion, and (e) the stopper member as described above. A first spring that urges toward the locking position,
(F) When the environmental temperature rises to an abnormal level, it overcomes the first spring and urges the stopper member in a direction away from the locking position, whereby the main body of the fireproof damper is pressed by the force of the damper spring. The second shape memory alloy that moves toward and closes the ventilation hole of the main body.
And a spring. In claim 2, the damper spring of claim 1 is omitted,
The fire damper is biased in the closing direction by gravity. According to a third aspect of the present invention, the locking portion has an inclined surface that retracts the stopper member from the locking position against the first spring when the fire damper is opened, and the stopper member is provided at the end of the inclined surface. It is characterized by locking. In claim 4,
The locking portion is formed on the indoor side surface of the fireproof damper,
The main body is provided with a support mechanism arranged on the indoor side, and the support member supports the stopper member and the first and second springs. Claim 5
Then, a plate material extending in a direction intersecting with the surface is provided on the indoor side surface of the fireproof damper, and a claw formed by cutting and raising the plate material is provided as a locking portion having the inclined surface. A shaft serving as a stopper member is supported by the support mechanism so as to be movable in a direction parallel to the rotation axis of the fireproof damper.

[0005]

In the ventilation device according to the first aspect of the present invention, the stopper member biased by the first spring locks the locking portion of the fireproof damper, so that the fireproof damper is opened in opposition to the force of the damper spring. Maintained. When the environmental temperature rises abnormally due to a fire in a neighbor's house, the force of the second spring made of shape memory alloy is strengthened to overcome the force of the first spring, and the stopper member is released from the locking portion. As a result, the fire damper rotates toward the main body by the force of the damper spring, and closes the ventilation hole of the main body. Since the second spring made of a shape memory alloy is used to release the open state of the fireproof damper and no fuse is used, it is possible to prevent the damper from closing due to the fatigue cutting of the fuse when the environmental temperature does not rise abnormally. . Furthermore, after the closing operation of the fireproof damper, the fireproof damper can be reset without replacing the parts, in other words, the fireproof damper can be opened again. That is, when the ambient temperature decreases, the elastic force of the second spring made of shape memory alloy weakens, and the stopper member moves to the first position.
It returns to the original locked position by the force of the spring. Therefore, if the stopper member is once separated from the locking position against the first spring and the fire damper is opened and then the stopper member is released, the stopper member can be locked to the locking portion. As a result, the open position of the fire damper can be maintained. In Claim 2, the fire damper is closed by gravity, and other operations are the same as those in Claim 1. In claim 3, resetting can be performed simply by opening the fire damper. That is, as the fire damper moves in the opening direction, the inclined surface of the locking portion retracts the stopper member, and the stopper member returns to the original locking position at the end of this inclined surface. In the fourth aspect, since the locking portion of the fireproof damper, the stopper member, and the first and second springs are arranged on the indoor side, the appearance from the outside is good. in this case,
It can be reset by pushing the fire damper with a thin rod from the ventilation hole of the main body. According to the fifth aspect, since the locking portion having the inclined surface is formed by the cut and raised plate material and the stopper member is formed by the shaft, the manufacturing cost is low.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the opening 1a is provided in the eaves of the house 1.
Is formed, and the ventilation device A is installed so as to close the opening 1a. The ventilation device A includes a horizontal main body 10 and a fire damper 20. The fireproof damper 20 is arranged above the main body 10, that is, on the indoor side, and is connected to the main body 10 in a vertically rotatable state.

As best shown in FIG. 1, the main body 10 is formed by pressing a rectangular plate, and has a peripheral edge portion 11 and a protruding portion 12 protruding downward from the peripheral edge portion 11. And have. The flat plate portion 1 of the protruding portion 12
A large number of ventilation holes 13 are formed in 2a. Since the fire damper 20 is of a rotating type, the total opening area of the ventilation holes 13 can exceed 50% of the area of the bottom plate portion 12a. It should be noted that the amount may be less than 50% if the required ventilation of the house is small. The protruding portion 12 of the main body 10 is fitted into the opening 1 a, and the peripheral portion 11 is fixed to the upper surface of the eaves roof 1.

As shown in FIG. 1, the fireproof damper 20 is formed by pressing a rectangular plate, and has a rectangular flat plate portion 21 and a peripheral edge portion standing upright from the peripheral edge of the flat plate portion 21. 22 and 22. This fire damper 2
One side edge of 0 is rotatably connected to one side edge of the main body 10. More specifically, a pin 30 projects from both ends of one side edge of the fire damper 20 in the extension direction of the one side edge, and the pin 30 is supported by a bearing plate 31 fixed to the main body 10. The center of one side edge of the fire damper 20 and the center of one side edge of the main body 10 are connected via a hinge 32.

A spiral spring 3 is attached to the pin of the hinge 32.
5 (spring for damper) is wound, and the fire damper 20 is urged downward by the spiral spring 35, that is, toward the main body 10.

A plate member 40 is fixed to the upper surface (indoor surface) of the fire damper 20 and extends in a direction orthogonal to the upper surface and away from the main body 10. The upper end portion of the plate member 40 is cut and raised to form a claw 41 (locking portion). The claw 41 is inclined with respect to the plate member 40, and one surface thereof is an inclined surface 41a (see FIG. 3) that functions as described later.

A support mechanism 50 is provided above the main body 10 (inside the room). This support mechanism 5
0 is one plane U-shaped support plate 51 and two planes L
It is provided with character-shaped support plates 52 and 53. The support plate 51 is closest to the plate member 40, and the support plate 53 is the plate member 40.
Farthest away from. The support plate 51 is a fireproof damper 20.
It has a pair of flat plate-shaped support portions 51a extending toward the direction and orthogonal to the fire damper 20. Each of the support plates 52 and 53 also has a flat plate-shaped support portion 52a and 53a extending in the same direction as the support portion 51a.

A shaft 60 (stopper member) is supported on the support plate 51 in parallel with the rotation axis of the fire damper 20. More specifically, as best shown in FIG. 3, the shaft 60 is inserted into the holes 51x formed in the pair of support portions 51a of the support plate 51 and is movable in the axial direction. There is. A bush 61 is fitted on the shaft 60 between the pair of support portions 51a.
As shown in FIG. 1 and FIG. 3A, the right end of the shaft 60 projects from the right support portion 51 a and faces the plate member 40.

A spring receiver 62 is provided at the left end of the shaft 60.
Is attached. The spring receiver 62 and the support plate 52
A first spring 65 made of normal stainless steel in a compressed state is interposed between the first spring 65 and the supporting portion 52a. Further, hooking tools 66 and 67 are attached to the spring receiver 62 and the support portion 53a of the support plate 53, and the hooking tools 66 and 67 have a shape memory alloy smaller in diameter than the first spring 65. Second spring 6
Both ends of 8 are hooked. Second spring 68
Is coaxial with the first spring 65, and
2a through the hole 52x, the right side of which is the first spring 6
It is housed in 5. The second spring 68 has a natural length in this hooked state at normal temperature, but when the environmental temperature rises to an abnormal level, the natural length becomes shorter and a tensile force is generated.

In the above structure, the fireproof damper 20, the plate member 40, the support mechanism 50, the shaft 60, the first and second members.
Since the springs 65 and 68 are arranged on the indoor side and only the main body 10 can be seen from the outside, the appearance is good.

As shown in FIGS. 1 and 3 (A), at normal temperature, the shaft 60 is urged by the first spring 65, and the right end portion of the shaft 60 projects from the right side support portion 51a to prevent the fire damper 20. Since the claws 41 of the fire protection damper 20 are locked, the open position of the fire protection damper 20 is maintained against the force of the spiral spring 35 and the gravity of the fire protection damper 20. As a result, the house can be ventilated through the ventilation hole 13 of the main body 10. The spring receiver 62 attached to the shaft 60 hits the left support portion 51a, so that the protrusion amount of the right end portion of the shaft 60 is regulated, and the shaft 60 is
The locking position of is determined.

When the environmental temperature rises to an abnormal level due to a fire in the neighbor's house, as shown in FIG. 3B, the second spring 68 made of a shape memory alloy contracts, and the pulling force of the second spring 68 is the force of the first spring 65. To move the shaft 60 to the left. In other words, the shaft 60 is attached to the claw 4
1 is retracted from the locked position locked by 1. As a result, the fireproof damper 20 rotates toward the main body 10, that is, downward due to the gravity of the spiral spring 35 and the fireproof damper 20, and closes the ventilation hole 13 of the main body 10.
The retracted position of the shaft 60 is regulated by the bush 61 hitting the left support portion 51a of the support plate 51.

As shown in FIG. 3C, when the environmental temperature decreases after the closing operation of the fireproof damper 20, the elastic force of the second spring made of the shape memory alloy weakens to almost zero, and the shaft 60 becomes The force of the first spring 65 causes the protrusion to the original locking position. When the fire damper 20 is closed, the fire damper 20 can be reset by pushing it up from the ventilation hole 13 of the main body 10 through a thin rod. More specifically, the push-up of the fire protection damper 20 causes the pawl 41 to move upward, and eventually the pawl 4
The first inclined surface 41a contacts the right end of the shaft 60 at the locking position. When the claw 41 moves further upward, the claw 4
The inclined surface 41a of 1 moves the shaft 60 backward to the left,
At the end of this inclined surface 41a (the lower end of the claw 41), the shaft 6
0 is returned by the force of the first spring 65 to the original locking position shown in FIG. In this way, without replacing parts,
The fire damper 20 can be easily reset to the open position.

In the ventilator of the present embodiment, since no fuse is used, it is possible to prevent the damper closing operation due to the fatigue cutting of the fuse when the environmental temperature does not rise abnormally. Further, since the engaging portion having the inclined surface is formed by the cut and raised plate material and the stopper member is formed by the shaft, the manufacturing cost is low.

Instead of the support mechanism 50 of the above embodiment, FIG.
You may use the support mechanism 150 shown in FIG. This support mechanism 1
The reference numeral 50 has a pair of flat plate-shaped support portions 151 and 152. Holes 1 formed in these supporting portions 151, 152
A shaft 160 is inserted through 51x and 152x so as to be supported in parallel with the rotation axis of the fireproof damper and movable in the axial direction. A spring receiver 162 is fixed to an intermediate portion of the shaft 160. This spring receiver 162
The first spring 1 in a compressed state between the support and the support portion 152.
65 is interposed, and the second spring 168 made of a shape memory alloy is interposed between the spring 161 and the support portion 151. The second spring 168 is in a tightly wound state at room temperature, and is pressed by the first spring 165 so that adjacent wound portions are in contact with each other. This second spring 16
8 regulates the rightward movement of the spring receiver 162, the shaft 160 is pushed by the first spring 165, and the claw 41 is pressed.
The locking position with respect to is maintained. When the environmental temperature rises to an abnormal level, the natural length of the second spring 168 extends and overcomes the first spring 165 to move the shaft 160 to the left and retract the shaft 160 from the locking position. As a result, the fire damper is closed.

The supporting mechanism 250 shown in FIG. 5 has a pair of flat plate-shaped supporting portions 251 and 252. A shaft 260 is inserted into holes 251x and 252x formed in the support portions 251, 252, is supported in parallel with the rotation axis of the fire protection damper, and is movable in the axial direction. A spring receiver 262 is fixed to the shaft 260. A first spring 265 in a compressed state is interposed between the spring receiver 262 and the support portion 252. The second spring 268 made of a shape memory alloy is arranged in parallel with the first spring 265, and both ends thereof have spring receivers 262.
And hooks 26 fixed to the support portion 252, respectively.
It is hooked on 6,267. Second spring 26
The natural length of 8 at room temperature is almost equal to the length shown in FIG.
When the environmental temperature rises to an abnormal level, the second spring 268 contracts and overcomes the first spring 265 to retract the shaft 260 from the locked position.

In the above embodiment, the fireproof damper 20
May be closed by gravity without the damper spring 35. Further, the main body 10 may be installed almost vertically on a wall of a house or the like.

[0022]

According to the first and second aspects of the present invention, the first and second springs, the stopper member and the engaging portion cooperate to maintain the open position of the fireproof damper and perform the closing operation at an abnormally high temperature. Since no fuse is used, it is possible to prevent the fire damper from closing due to a malfunction. Also,
When the fireproof damper is set to the open position again after the closing operation, the parts need not be replaced, and the resetting work is easy. According to the third aspect, the resetting of the fireproof damper is linked with the opening operation of the fireproof damper, so that the resetting work becomes easier. In the fourth aspect, since the locking portion of the fireproof damper, the stopper member, and the first and second springs are arranged on the indoor side, the appearance from the outside is good. According to claim 5, the manufacturing cost of the ventilation device is low.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a ventilation device with a fire damper according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which the ventilation device is installed on the eaves.

FIG. 3 is a cross-sectional view of an essential part for explaining the operation of the ventilation device, in which (A) shows a state in which the pawl is locked to the shaft and the open position of the fire damper is maintained, and (B) shows the shaft. Shows the state when the fire damper is closed by retracting from the claw, and (C) shows how to reset the fire damper.

FIG. 4 is a cross-sectional view of essential parts showing another embodiment of the present invention.

FIG. 5 is a sectional view of an essential part showing still another embodiment of the present invention.

[Explanation of symbols]

 10 ... Main body 13 ... Ventilation hole 20 ... Fireproof damper 35 ... Spiral spring (damper spring) 40 ... Plate material 41 ... Claw (locking part) 41a ... Inclined surface 50, 150, 250 ... Support mechanism 60, 160, 260 ... Shaft (stopper member) 65,165,265 ... 1st spring 68,168,268 ... 2nd spring

Claims (5)

[Claims] Claims: 1. A fire protection having a main body having (a) a ventilation hole, and (b) an indoor side of the main body, one side edge being rotatably connected to the main body, and having a locking portion. A damper, (c) a damper spring for urging the fireproof damper toward the main body, and (d) a damper spring movably supported by the main body, and by locking the locking portion, the damper spring Against the heat, the stopper member that keeps the fire damper at the open position away from the main body, (e) The first spring that biases the stopper member toward the locking position, and (f) the environmental temperature is abnormal. When it reaches a level, it overcomes the first spring and urges the stopper member in a direction away from the locking position, thereby moving the fireproof damper toward the main body by the force of the damper spring. It is allowed to with fire dampers ventilator, characterized in that it comprises a second spring made of causing the shape memory alloy closing the vent of the body, the. 2. (a) A main body having a ventilation hole, and (b) one side edge rotatably connected to the main body so that the main body is arranged on the indoor side of the main body and gravity acts toward the main body. Is
And (c) a movably supported by the main body and a fireproof damper having a locking part, and by locking the locking part, the fireproof damper is maintained at an open position apart from the main body against gravity. A stopper member; (d) a first spring for urging the stopper member toward the locking position; and (e) a stopper member that overcomes the first spring when the environmental temperature rises to an abnormal level. A second spring made of a shape memory alloy that urges the fireproof damper in a direction away from the locking position, thereby moving the fireproof damper toward the main body by the action of gravity and closing the ventilation opening of the main body. Ventilation device with fire damper characterized by 3. The locking portion has an inclined surface that retracts the stopper member from the locking position against the first spring when the fire damper is opened, and the stopper member is provided at the end of the inclined surface. Locking, characterized in that it is locked.
Ventilation device with a fire damper according to any one of 1. 4. The locking portion is formed on an indoor surface of a fire damper, and the main body is provided with a support mechanism arranged on the indoor side. The support mechanism includes the stopper member and the first member. The second ventilation is supported, and the ventilation device with a fire damper according to claim 3, wherein the second spring is supported. 5. A plate member extending in a direction intersecting with the surface is provided on an indoor surface of the fireproof damper, and a claw formed by cutting and raising the plate member serves as a locking portion having the inclined surface. A shaft serving as a stopper member is supported by the support mechanism so as to be movable in a direction parallel to the rotation axis of the fire protection damper.
Ventilation device with fire damper described in.