JPH06193927A - Outdoor hood with fire damper - Google Patents

Abstract

PURPOSE:To prevent failure in operation of a pressure plate accurately as caused by dust adhering to and rust or the like generated at a support part of the pressure plate of an outdoor hood with a fire damper. CONSTITUTION:This device is provided with a damper mounting frame 1 which is set at an opening 3 of a room wall 2 and has a ventilation path 5 inside, a damper plate 9 which has an upper end part thereof supported at an upper part of the damper mounting frame 1 free to turn to open or close a ventilation path 5, an outdoor hood 10 mounted on the damper mounting frame 1 covering the damper plate 9 and a temperature fuse 18 to keep the damper plate 9 opened. A pressure plate 12 which has one end thereof supported free to turn to be a base end part is provided on the internal wall of the outdoor hood 10 to press the damper plate 9 in the direction of closing it making the tip part of the base end part abut the damper plate 9 when it is closed. The tip part of the pressure plate 12 is engaged with a guide part 13 provided on the damper 9 free to slide vertically.

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 it at an opening such as a ventilation port provided in a room wall. It's about food.

[0002]

2. Description of the Related Art In recent years, an outdoor hood with a fireproof damper has been in increasing demand due to its safety as a ventilation member for preventing the spread of fire due to fire.

Conventionally, this type of outdoor hood with a fire damper has generally been constructed as shown in Japanese Utility Model Laid-Open No. 2-17148. The configuration will be described below with reference to FIGS.

As shown in the drawing, the outdoor 103 inside the damper mounting frame 105 which is installed on the outdoor 103 side of the opening 102 opened in the indoor wall 101 and has the ventilation passage 104 therein.
An outdoor hood that covers the damper plate 107 from the outside 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 unit 106 provided at the side upper end portion. 108 is attached to the damper mounting frame 105, and the ventilation passage 1 of the outdoor hood 108 is further attached.
04, a support portion 108a provided on the inner wall surface is rotatably supported at one end thereof to form a base end portion. When the damper plate 107 is closed, the tip end portion thereof has a damper plate 107a.
The pressing plate 109 for pressing the damper plate 107 and the damper plate 107 are held in an open state so as not to open the damper plate 107, and the ventilation path 104 and the outdoor hood 10 are held.
8. When there is an abnormally high temperature ventilation inside, a temperature fuse 110 is provided to melt and blow the damper plate 107 to release the holding of the damper plate 107. A fire occurs, the temperature fuse 110 is melted and the damper plate 107 is held. When it is further opened, the damper plate 107 and the pressing plate 109 rotate by their own weight, and the tip 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 plate 104 is closed and the damper plate 107 is pressed against the locking plate 111 by the pressing plate 109, the pressure inside the room 112 rises due to a fire, and the damper plate 107 tries to open. To prevent the fire from spreading.

[0005]

In such a conventional outdoor hood with a fireproof damper, dust is attached to the supporting portion 108a of the pressing plate 109 or rust occurs when it is used for a long period of time, so There is a problem that the damper plate 107 cannot be pressed when the rotation operation of the plate 109 is hindered and the pressing plate 109 does not rotate due to its own weight.

Further, one end of a damper plate 107 is rotatably supported by a damper supporting portion 106 provided at the upper end inside the damper mounting frame 105, and the tip end thereof is supported by a locking plate 111 of the damper mounting frame 105. Since the ventilation passage 104 is closed by bringing them into contact with each other, the ventilation passage 104 is closed.
When the damper plate 107 is closed, the damper plate 107 is housed inside the ventilation passage 104, and in order to perform a favorable pivoting operation of the damper plate 107, there is a certain amount of clearance 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.

Further, 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 fireproof damper, the returning work of the damper portion is performed from the inside 112 side without turning to the outside 103 side. For ease of operation, the pressing plate 109 is formed so that its tip portion is located above the supporting portion 108a when the damper plate is closed, and the lower portion of the damper plate 107 is strongly urged from the room 112 side to the outdoor 103 side. By pushing and rotating,
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. Therefore, when the pressure on the room 112 side abnormally rises due to a fire. There is a ventilation path 1
There was a risk that 04 would be opened.

The present invention is intended to solve the above problems. While the outdoor hood with a fireproof damper is used for a long period of time, dust or rust is generated on the support portion of the pressing plate. A first object of the present invention is to provide an outdoor hood with a fireproof damper that can surely prevent it from not operating.

A second object is to improve the shut-off 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 ensure that the fire damper is kept closed in the event of a fire without impairing the workability of the fire damper of the outdoor hood with the fire damper.

[0011]

A first means for achieving the first object of the present invention is to install a damper mounting frame which is installed in an opening opened in a chamber wall and has a ventilation passage therein. A damper plate that opens and closes the ventilation passage by rotatably supporting the upper end of the damper mounting frame on the upper side of the outdoor side; 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, which holds the damper plate in an open state, and one end of the outdoor hood, which is rotatably supported by the inner wall of the outdoor hood, serving as a base end, and a tip end thereof. And a pressing plate that abuts against the damper plate when the damper plate is closed and presses the damper plate in the closing direction, and the tip end of the pressing plate is vertically slidable on a guide portion provided on the damper plate. Fire damper engaged with It is obtained by the outdoor hood configuration.

A second means for achieving the second object is that the damper mounting frame integrally includes a flange portion formed by bending an outer peripheral end portion inward by drawing, and the flange portion is integrally formed. An outdoor hood with a fire-damping damper is configured to close a ventilation path of the damper mounting frame by abutting a damper plate on the hood.

A third means for achieving the third object is to lock the damper plate in the closing direction by arranging the tip of the pressing plate and the support portion substantially horizontally when the damper plate is closed. An outdoor hood with a fire damper is provided, in which the damper plate is provided with a lock releasing device for releasing the pressure lock of the pressing plate from the indoor side.

[0014]

According to the present invention, the structure of the above-mentioned first means makes it possible to prevent dust from adhering to the support portion of the pressing plate or rust or the like during use of the outdoor hood with the fireproof damper for a long period of time, so Even if the turning operation is hindered, there is abnormally high temperature ventilation in the ventilation passage and inside the outdoor hood during a fire.
When the thermal fuse is blown, the damper plate rotates downward by its own weight, and the pressing plate is forcedly interlocked with the damper plate to rotate downward, and when the damper plate is closed, the damper plate is pressed. It will be surely pressed so as not to open.

Further, according to the structure of the second means, the outer peripheral edge of the damper mounting frame is drawn, whereby the damper plate is brought into contact with the integrally provided flange portion to close the ventilation passage. 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 significantly improved. Therefore, when the damper plate is closed, the gap generated between the damper plate and the flange portion can be reduced.

Further, according to the structure of the third means, when the damper plate is closed, the tip end portion of the pressing plate and the support portion are positioned horizontally, and by locking the damper plate, the pressure inside the room rises abnormally. It is possible to reliably prevent the damper plate from being opened, and after the damper plate is closed, the lock plate can be easily unlocked from the indoor side by the lock release device to restore the fire damper part. It will be possible.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to.

As shown in the drawing, reference numeral 1 denotes a damper plate mounting frame, which is a frame-like shape that surrounds the outer periphery of the opening 3 opened in the chamber wall 2 on the outdoor 4 side, and opens a ventilation passage 5 formed therein. It is fixed to the chamber wall 2 by a mounting flange portion 6 provided on the outer circumference of one end portion so as to communicate with the portion 3. Further, a flange portion 7 formed by bending a peripheral end portion of the damper plate mounting frame 1 inwardly by drawing is integrally provided at an end portion of the damper plate mounting frame 1 on the outdoor 4 side. A plate-shaped damper plate 9 that opens and closes the ventilation passage 5 by rotatably supporting the upper end of the damper support portion 8 provided on the upper portion of the portion 7.
Is provided. 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. Then, inside the outdoor hood 10, a bar material is formed into a substantially rectangular shape, and one end on the long axis side is used as a support portion 12a. This support portion 12a is used as an inner wall surface on the outdoor 4 side of the outdoor hood 10. The pressing plate supporting part 11 provided is rotatably supported, and the other end, that is, the tip part is used as an engaging part 12b, and the engaging part 12b is placed outside the damper plate 9 in the closed state. By vertically slidably engaging a guide portion 13 provided in an upward direction from a position substantially horizontal to the support portion 12a on the fourth side, the rotational movement of the pressing plate 12 itself is performed by the damper plate 9. When the damper plate 9 is closed, the support part 12a and the engaging part 12b are positioned substantially horizontally, and the damper plate 9 is locked in the closing direction.

Further, the entire length of the pressing plate 12 is formed so as to press the damper plate 9 against the flange portion 7 when the support plate 12a and the engaging portion 12b are positioned substantially horizontally when the damper plate 9 is closed. ing. Further, inside the outdoor hood 10, a spring engagement portion 14 provided above the pressing plate support portion 11 is provided.
Is provided with a coil spring 16 whose one end is connected via a connecting rod 15 to the interior 2 of the damper plate 9.
The other end of the thermal fuse 18, which has one end engaged with the fuse engaging portion 17 provided on the 0 side, rotates the damper plate 9 upward to open it, and also presses the pressing plate 1.
2 at the position where the coil spring 16 is rotated upward.
Is connected to the other end of the damper plate 9, and the connecting rod 15 is brought into contact with the lower end of 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 to the room 20 side from an engagement hole 19 provided near the lower end of the guide part 13 of the damper plate 9, and the room 20 side end part is provided. The rotary handle portion 21 is formed on the other end of the outdoor side 4, and when the damper plate 9 is closed in conjunction with the rotation operation of the rotary handle portion 21, the pressing plate 12 that press-locks the damper plate 9 is formed. An unlocking device 23 is provided, which is provided with an arm 22 that unlocks the pressing plate 12 by pushing up the vicinity of the engaging portion 12b.

In the above structure, when a fire occurs on the room 20 side and there is an abnormally high temperature ventilation in the ventilation passage 5 and the inside of the outdoor hood 10, and the temperature fuse 18 is blown, the damper plate 9 is rotated downward by its own weight. Start moving. Then, as the damper plate 9 rotates, the pressing plate 1
2 starts to rotate downward due to its own weight, and the engaging portion 12b of the pressing plate 12 slides downward while being guided by the guide portion 13, and the pressing plate 12 is forcibly rotated. start. Further, as the damper plate 9 rotates in the direction of closing the ventilation path 5, the pressing plate 12 is guided by the guide portion 13 while the engaging portion 12b thereof is guided downward.
As the damper plate 9 is rotated, the damper plate 9 abuts the flange portion 7 of the damper mounting frame 1 to close the ventilation passage 5, and at the same time, the tip end of the engaging portion 12b of the pressing plate 12 is exposed outside the damper plate 9. The damper plate 9 is pressed against the flange portion 7 by coming into contact with the surface on the fourth side. At this time, the engaging portion 12b and the supporting portion 12a are positioned substantially horizontally, so that the damper plate 9 is reliably locked when it is about to rotate in the opening direction.

Then, after the fire is extinguished and plays a role as a fire damper, the handle portion 21 of the unlocking device 23 is turned from the inside of the room 20 to rotate the arm portion 22 to engage the pressing plate 12. The joint plate 12b is pushed upward to release the pressure lock of the pressure plate 12, and the damper plate 9 is released.
It is possible to complete the restoration work of the fire damper part by opening the vicinity of the lower end of the fuse while pushing it to the outdoor side 4 and replacing the blown thermal fuse 18 with a new one.

As described above, according to the outdoor hood with the fireproof damper of the embodiment of the present invention, dust is adhered to the support portion 12a of the pressing plate 12 or rust is generated during long-term use and the pressing plate is pressed. The rotational movement of 12 is hindered and the pressing plate 12
Even when it does not rotate only by its own weight, when there is an abnormally high temperature ventilation inside the ventilation passage 5 and the outdoor hood 10 at the time of a fire and the temperature fuse 18 is blown, the damper plate 9 is pressed against the rotation operation. Since the plate 12 is forcibly interlocked, when the damper plate 9 is closed, the pressing plate 13 can surely press the damper plate 9 so as not to open it.

Further, by drawing the peripheral end portion of the damper plate mounting frame 1 on the outdoor 4 side, the damper plate 9 is brought into contact with the integrally provided flange portion 7, whereby the ventilation passage 5 is formed.
Since it is closed, it is not necessary 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 the purpose of favorably rotating the damper plate 9. Since the flatness is significantly improved, 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 a fire damper of the present invention, when the damper plate 9 is closed, the space 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 lock the damper plate 9 in a closed state. It is possible to reliably prevent an abnormal increase in pressure from opening the damper plate 9. Further, after the fire is extinguished, the lock release device 23 does not move to the outside 4 side and the lock release device 23 does not rotate to the outside 4 side. Handle part 2
By releasing the pressure lock of the pressure plate 12 by a simple operation of operating the operation 1, the return operation of the fire damper part can be performed from the room 20 side.

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

[0027]

As is apparent from the above embodiments, according to the present invention, when the damper plate that closes the ventilation passage in the event of a fire is rotated, the pressing plate that presses the damper plate in the closing direction is rotated. Since the operation is forcibly interlocked, while the outdoor hood with a fire damper is used for a long period of time, dust and rust etc. will adhere to the support part of the pressure plate and the rotation of the pressure plate will be hindered. Thus, it is possible to provide an outdoor hood with a fire damper capable of reliably preventing the pressing plate from becoming inoperative.

Further, the outer peripheral edge of the damper mounting frame is
When the damper plate is closed, the damper plate is brought into contact with the flange part that is integrally formed with this damper plate mounting frame to close the ventilation passages by the drawing process, without damaging the rotational operability of the damper plate. It is possible to improve the effect of blocking the ventilation passage.

Further, when the damper plate is closed, the tip of the pressing plate and the support are positioned substantially horizontally to press and lock the damper plate, and after playing a role as a fireproof damper, the lock is released from the inside of the room. Since the pressing lock state of the pressing plate can be released by operating the device, the damper plate can be reliably held in the closed state at the time of a fire without impairing the returning workability of the fireproof damper part.

[Brief description of 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 an embodiment of the present invention.

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

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

FIG. 4 is a side sectional view showing an open state of a damper plate of a conventional outdoor hood with a fire damper.

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

FIG. 6 is a front view showing an open state of the damper plate of the outdoor hood with the fireproof damper.

[Explanation of symbols]

 1 Damper Mounting Frame 2 Chamber Wall 3 Opening 4 Outdoor 5 Ventilation Path 7 Flange 9 Damper Plate 10 Outdoor Hood 12 Pressing Plate 12a Support 12b Engagement 13 Guide 18 Thermal Fuse 20 Indoor 23 Lock Release Device

Claims (3)

[Claims] 1. A damper mounting frame which is installed in an opening opened in a chamber wall and has a ventilation passage therein, and an upper end of the damper mounting frame which is rotatably supported by an upper portion of an outer side of the damper mounting frame. A damper plate that opens and closes the ventilation passage, an outdoor hood that covers the damper plate and is attached to the damper mounting frame, and a thermal fuse that is provided inside the outdoor hood and that holds the damper plate in an open state, One end of the outdoor hood 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 outdoor hood with a fire damper in which a tip portion of the pressing plate is vertically slidably engaged with a guide portion provided on the damper plate. 2. The damper mounting frame integrally includes a flange portion which is formed by bending an outer peripheral end portion inward by drawing, and a damper plate is brought into contact with the flange portion to ventilate the damper mounting frame. The outdoor hood with a fire damper according to claim 1, which closes the road. 3. When the damper plate is closed, the tip end portion of the pressing plate and the support portion are positioned substantially horizontally to press-lock the damper plate in the closing direction, and the damper plate is press-locked to the pressing plate from the indoor side. The outdoor hood with a fireproof damper according to claim 1 or 2, further comprising a lock release device for releasing the lock.