JP2604955B2 - Outdoor hood with fire damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor with a fire damper for preventing a fire from spreading to another house when a fire occurs by providing the opening in a ventilation hole or the like provided in a room wall. It's about food.

[0002]

2. Description of the Related Art In recent years, outdoor hoods with fireproof dampers have been increasingly demanded as ventilation members for preventing the spread of fire due to fire, due to their safety.

Heretofore, this type of outdoor hood with a fireproof damper has generally been configured as shown in Japanese Utility Model Laid-Open No. 2-17148. Hereinafter, the configuration will be described with reference to FIGS.

[0004] As shown in the figure, the outside 103 inside a damper mounting frame 105 which is installed on the outside 103 side of an opening 102 opened to a room wall 101 and has an air passage 104 therein.
An outdoor hood that covers the damper plate 107 from the outdoor 103 side while providing a damper plate 107 that opens and closes the ventilation passage 104 by rotatably supporting one end of the damper support portion 106 provided at the upper end of the side. 108 is mounted on the damper mounting frame 105, and
One end is rotatably supported by a supporting portion 108a provided on the inner wall surface facing the inner wall 04 and serves as a base end, and when the damper plate 107 is closed, the front end thereof becomes the damper plate 107.
, And the damper plate 107 is pressed so that the damper plate 107 does not open, and the damper plate 107 is held in an open state.
8, when an abnormally high temperature of air is blown inside, a thermal fuse 110 is provided to blow the fuse and release the holding of the damper plate 107. A fire occurs, the thermal fuse 110 blows, and the damper plate 107 is held. When the damper plate 107 is released further, the damper plate 107 and the pressing plate 109 rotate by their own weight, and the leading end of the damper plate 107 comes into contact with the locking plate 111 projecting from the lower surface of the inner wall of the damper mounting frame 105. When the ventilation passage 104 is closed and the damper plate 107 is pressed against the locking plate 111 by the pressing plate 109, the pressure in the room 112 increases due to the fire, and the damper plate 107 is opened. To prevent the fire from spreading.

[0005]

In such a conventional outdoor hood with a fire damper, dust adheres to the support portion 108a of the pressing plate 109 and rust or the like is generated during use for a long period of time. When the rotation of the plate 109 is hindered and the pressing plate 109 does not rotate due to its own weight, there is a problem that the damper plate 107 cannot be pressed.

Further, one end of a damper plate 107 is rotatably supported by a damper support portion 106 provided at an upper end inside the damper mounting frame 105, and a front end portion is supported by a locking plate 111 of the damper mounting frame 105. Since the ventilation passage 104 is closed by being brought into contact, the ventilation passage 104 is closed.
When the damper plate 107 is closed, the damper plate 107 is accommodated in the ventilation passage 104. To make the rotation of the damper plate 107 satisfactory, a certain gap is provided between the inner wall of the damper mounting frame 105 and the outer periphery of the damper plate 107. Therefore, there is a problem that the blocking effect of the ventilation passage 104 is deteriorated.

Also, as shown in FIG. 5, a fire occurs,
After the damper plate 107 is closed and the pressing plate presses the damper plate 107 to serve as a fire damper, the return operation of the damper portion does not turn to the outdoor 103 side, but from the indoor 112 side. To facilitate the operation, the shape of the pressing plate 109 is formed such that the tip portion is located above the support portion 108a when the damper plate is closed, and the lower portion of the damper plate 107 is strongly pushed from the room 112 side to the outdoor 103 side. By pushing and turning,
When the pressure on the room 112 side abnormally rises due to a fire, since the tip of the pressing plate 109 is rotated while sliding upward, the damper plate 107 cannot be pressed and locked in the closed state. Has a ventilation path 1
04 could be opened.

The present invention has been made to solve the above-mentioned problems, and while the outdoor hood with a fireproof damper has been used for a long period of time, dust adheres to the support portion of the pressing plate or rust is generated. It is a first object of the present invention to provide an outdoor hood with a fireproof damper that can reliably prevent operation from stopping.

A second object is to improve the blocking effect when the damper plate is closed as much as possible without impairing the rotational operability of the damper plate.

A third object of the present invention is to surely keep the fire damper closed in the event of a fire without impairing the return workability of the fire damper portion of the outdoor hood with the fire damper.

[0011]

A first means for achieving the first object of the present invention is a damper mounting frame installed in an opening formed in a chamber wall and having a ventilation passage therein. A damper plate that opens and closes the ventilation passage by rotatably supporting an upper end of the damper mounting frame at an outdoor upper portion, and an outdoor hood that covers the damper plate and is attached to the damper mounting frame. A temperature fuse provided inside the outdoor hood and holding the damper plate in an open state; and an inner wall of the outdoor hood having one end rotatably supported as a base end, and a tip end thereof. A pressure plate which is brought into contact with the damper plate when the damper plate is closed, and presses the damper plate in a closing direction; and a tip end of the pressure plate is vertically slidable on a guide provided on the damper plate. Fire damper engaged with It is obtained by the outdoor hood configuration.

A second means for attaining the second object is that the damper mounting frame integrally has a flange portion formed by drawing inward the outer peripheral end portion by drawing, and this flange portion is provided. And an outdoor hood with a fireproof damper for closing a ventilation path of the damper mounting frame by contacting a damper plate with the damper plate.

A third means for attaining the third object is that, when the damper plate is closed, the distal end portion of the pressing plate and the support portion are positioned substantially horizontally to press-lock the damper plate in the closing direction. An outdoor hood with a fire damper is provided, wherein the damper plate is provided with an unlocking device for unlocking the pressing plate from the indoor side.

[0014]

According to the first aspect of the present invention, when the outdoor hood with the fire damper is used for a long period of time, dust adheres to the support portion of the pressing plate or rust or the like is generated, so that the pressing plate can be rusted. Even if the rotation operation is hindered, there is abnormally high temperature ventilation in the ventilation path and inside the outdoor hood at the time of fire,
When the thermal fuse is blown, the damper plate pivots downward by its own weight, and the pressing plate is forcibly linked to the damper plate and pivots downward. When the damper plate is closed, the damper plate moves downward. Is surely pressed so as not to open.

According to the second means, the outer peripheral end of the damper mounting frame is drawn so that the damper plate is brought into contact with the integrally provided flange to close the ventilation passage. Therefore, it is not necessary to provide a gap between the inner wall surface of the damper plate mounting frame and the outer periphery of the damper plate so as to favorably rotate the damper plate, and the flatness of the flange portion is greatly improved. That is, the gap generated between the damper plate and the flange when the damper plate is closed can be reduced.

According to the configuration of the third means, when the damper plate is closed, the distal end of the pressing plate and the support portion are positioned horizontally, and by locking the damper plate, the pressure inside the room rises abnormally. After the damper plate is closed, the lock plate can be easily unlocked by the lock release device from the indoor side, and the fire protection damper can be returned after the damper plate is closed. You can do it.

[0017]

1 to 3 show an embodiment of the present invention.
This will be described with reference to FIG.

As shown in FIG. 1, reference numeral 1 denotes a damper plate mounting frame, which has a frame shape surrounding an outer periphery of an opening 3 opened in the chamber wall 2 on the outdoor 4 side, and has a ventilation passage 5 formed therein. It is fixed to the chamber wall 2 by a mounting flange portion 6 provided on the outer periphery of one end so as to communicate with the portion 3. Further, a flange portion 7 is formed integrally with the damper plate mounting frame 1 at an end on the outdoor 4 side, which is formed by bending a peripheral end portion of the damper plate mounting frame 1 inward by drawing. A plate-shaped damper plate 9 for opening and closing the ventilation passage 5 by rotatably supporting the upper end of a damper support 8 provided on the upper part of the section 7
Is provided. Further, an outdoor hood 10 that covers the damper plate mounting frame 1 and the damper plate 9 from the outdoor 4 side is mounted on the damper mounting frame 1 to prevent rainwater from entering from the outdoor 4 side. In the interior of the outdoor hood 10, a bar is formed in a substantially rectangular shape, and one end on the long side of the axial length is used as a support portion 12 a, and this support portion 12 a is attached to the inner wall surface of the outdoor hood 10 on the outdoor 4 side. The other end, that is, the tip, is made to be an engaging portion 12b while being rotatably supported by the provided pressing plate supporting portion 11, and this engaging portion 12b is placed outside the damper plate 9 in the closed state of the damper plate 9. The pivoting operation of the pressing plate 12 itself is performed by engaging the supporting portion 12a on the fourth side with a guide portion 13 provided upward from a substantially horizontal position so as to be slidable in the vertical direction. When the damper plate 9 is closed, the supporting portion 12a and the engaging portion 12b are positioned substantially horizontally when the damper plate 9 is closed, and the closing direction of the damper plate 9 is locked.

Further, the entire length of the pressing plate 12 is formed to a length that presses the damper plate 9 against the flange portion 7 when the support portion 12a and the engaging portion 12b are substantially horizontal when the damper plate 9 is closed. ing. A spring engagement portion 14 provided above the pressing plate support portion 11 is provided inside the outdoor hood 10.
A coil spring 16 whose one end is connected via a connecting rod 15 is provided in the room 2 of the damper plate 9.
The other end of the thermal fuse 18 having one end engaged with the fuse engaging portion 17 provided on the surface on the 0 side is opened by rotating the damper plate 9 upward, and the pressing plate 1 is opened.
2 is rotated upward, and the coil spring 16 is
The other end of the damper plate 9 is connected to the lower end of the damper plate 9 so that the connecting rod 15 is in contact with the damper plate 9 to hold the damper plate 9 in an open state. Further, one end of the damper plate 9 is rotatably faced toward the room 20 from an engagement hole 19 provided near the lower end of the guide portion 13 of the damper plate 9. When the damper plate 9 is closed at the other outdoor 4 side end in conjunction with the rotation of the rotary handle portion 21 at the other end of the outdoor 4, the pressing plate 12 which presses and locks the damper plate 9 is formed. An unlocking device 23 provided with an arm portion 22 for lifting the vicinity of the engaging portion 12b upward to unlock the pressing plate 12 is provided.

In the above configuration, when a fire occurs in the room 20 and abnormally high temperature air flows inside the ventilation path 5 and the outside hood 10 and the temperature fuse 18 is blown, the damper plate 9 is turned downward by its own weight. Start moving. The pressing plate 1 is rotated by the rotation of the damper plate 9.
2 starts rotating downward by its own weight, and the engaging portion 12b of the pressing plate 12 slides downward by being guided by the guide portion 13, whereby the pressing plate 12 is forcibly rotated. start. Further, as the damper plate 9 rotates in the direction to close the ventilation passage 5, the guide plate 13 pushes the engaging plate 12b while guiding the engaging portion 12b downward.
Is rotated, and the damper plate 9 contacts the flange portion 7 of the damper mounting frame 1 to close the ventilation passage 5, and at the same time, the front end of the engaging portion 12 b of the pressing plate 12 moves outside the damper plate 9. The damper plate 9 is pressed against the flange portion 7 by abutting on the surface on the fourth side. At this time, since the engaging portion 12b and the support portion 12a are positioned substantially horizontally, the damper plate 9 is reliably locked from rotating in the opening direction.

After the fire has been extinguished and has served as a fire prevention damper, the arm 22 is turned by turning the handle 21 of the lock release device 23 from the room 20 side, and the pressing plate 12 is engaged. The joint 12b is pushed upward to release the pressing lock of the pressing plate 12, and the damper plate 9
By pressing the lower end portion of the airbag 1 toward the outside 4 while opening it, and replacing the blown thermal fuse 18 with a new one, the return operation of the fireproof damper unit can be completed.

As described above, according to the outdoor hood with the fireproof damper according to the embodiment of the present invention, dust adheres to the support portion 12a of the pressing plate 12 and rust or the like is generated during use for a long period of time. The rotation of the pressure plate 12 is hindered.
When the fire does not rotate by its own weight alone, there is an abnormally high temperature in the ventilation path 5 and the inside of the outdoor hood 10 at the time of a fire, and when the temperature fuse 18 is blown, the rotation of the damper plate 9 is pressed. Since the plate 12 is forcibly linked, when the damper plate 9 is closed, the pressing plate 13 can reliably press the damper plate 9 so as not to open.

Further, by drawing the peripheral end of the damper plate mounting frame 1 on the outdoor 4 side, the damper plate 9 is brought into contact with the integrally formed flange portion 7 to thereby form the ventilation passage 5.
Is closed, there is no need to provide a gap between the inner wall surface of the damper plate mounting frame 1 and the outer periphery of the damper plate 9 for favorably rotating the damper plate 9. The flatness is greatly improved, and the gap generated between the damper plate 9 and the flange portion 7 when the damper plate 9 is closed can be greatly reduced.

As described above, according to the outdoor hood with the fireproof damper of the present invention, when the damper plate 9 is closed, the gap between the damper plate 9 and the flange portion 7 is maintained without impairing the rotational operability of the damper plate 9. The generated gap can be reduced.

When the damper plate 9 is closed, the pressing plate 1
The second engaging portion 12b and the supporting portion 12a are positioned substantially horizontally to press the damper plate 9 against the flange portion 7 and to lock the damper plate 9 in a closed state. It is possible to reliably prevent the pressure from rising abnormally and to attempt to open the damper plate 9, and after the fire has been extinguished, the lock release device 23 does not turn to the outdoor 4 side but from the indoor 20 side. Handle part 2
By simply releasing the pressing lock of the pressing plate 12 with a simple operation of operating the device 1, the returning operation of the fire prevention damper unit can be performed from the room 20 side.

As described above, according to the outdoor hood with a fireproof damper of the present invention, in the event of a fire, the damper plate 9 is securely held in the closed state, and the work of returning the fireproof damper portion does not go to the outside 4 side. It can be performed only on the room 20 side.

[0027]

As is clear from the above embodiments, according to the present invention, the rotation of the damper plate for closing the ventilation path in the event of a fire occurs by the rotation of the pressing plate for pressing the damper plate in the closing direction. Because the operation is forcibly linked, dust or rust etc. adheres to the support of the pressing plate while using the outdoor hood with fire damper for a long period of time, which hinders the rotation of the pressing plate Thus, it is possible to provide an outdoor hood with a fireproof damper that can reliably prevent the pressing plate from becoming inoperative.

The outer peripheral end of the damper mounting frame is
By drawing, the damper plate is brought into contact with a flange portion provided integrally with the damper plate mounting frame to close the ventilation path, so that the damper plate can be rotated without impairing its rotational operability. The effect of blocking the ventilation path can be improved.

When the damper plate is closed, the distal end of the pressing plate and the support are positioned substantially horizontally to press-lock the damper plate and, after serving as a fire damper, release the lock from the indoor side. Since the pressing lock state of the pressing plate can be released by operating the device, the damper plate can be securely held in the closed state when a fire occurs without impairing the return workability of the fire prevention damper unit.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an open state of a damper plate of an outdoor hood with a fire damper according to one embodiment of the present invention.

FIG. 2 is a side cross-sectional view showing a closed state of a damper plate of the outdoor hood with a fireproof damper.

FIG. 3 is a partially cutaway front view showing a closed state of a damper plate of the outdoor hood with the fireproof damper.

FIG. 4 is a side sectional view showing a state in which a damper plate of a conventional outdoor hood with a fireproof damper is opened.

FIG. 5 is a side cross-sectional view showing a closed state of the damper plate of the outdoor hood with the fireproof damper.

FIG. 6 is a front view of the outdoor hood with the fireproof damper in a state where a damper plate is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Damper mounting frame 2 Room wall 3 Opening 4 Outdoor 5 Ventilation path 7 Flange part 9 Damper plate 10 Outdoor hood 12 Press plate 12a Support part 12b Engagement part 13 Guide part 18 Temperature fuse 20 Indoor 23 Lock release device

Claims (3)

(57) [Claims] 1. A damper mounting frame which is installed in an opening formed in a room wall and has an air passage therein, and an upper end portion of the damper mounting frame is rotatably supported at an upper portion on the outside of the room. A damper plate that opens and closes the ventilation path, an outdoor hood that covers the damper plate and is attached to the damper mounting frame, and a temperature fuse that is provided inside the outdoor hood and holds the damper plate in an open state. On the inner wall of the outdoor hood, one end is rotatably supported as a base end, and the tip end is brought into contact with the damper plate when the damper plate is closed, and the damper plate is pressed in the closing direction. An outer hood with a fire damper in which a front end of the pressing plate is slidably engaged with a guide provided on the damper plate in a vertical direction. 2. The damper mounting frame is integrally provided with a flange portion formed by bending an outer peripheral end portion inward by drawing, and a damper plate is brought into contact with the flange portion to allow ventilation of the damper mounting frame. The outdoor hood with a fire damper according to claim 1, which closes a road. 3. When the damper plate is closed, the distal end portion of the pressing plate and the support portion are positioned substantially horizontally to lock the damper plate in the closing direction and lock the pressing plate to the damper plate from the indoor side. The outdoor hood with a fireproof damper according to claim 1 or 2, further comprising a lock release device that releases the lock.