JP3497350B2 - 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 a fireproof damper used at the outdoor end of a duct for air conditioning equipment.

[0002]

2. Description of the Related Art In recent years, as a ventilation member for a duct for preventing backflow of smoke due to a fire, the demand for the fireproof damper is increasing more and more. Conventionally, this type of fire damper generally has a structure as disclosed in Japanese Patent Laid-Open No. 2-307485. The configuration will be described below with reference to FIGS. 11 and 12.
Will be described with reference to.

As shown in the drawing, an air passage 101 is provided inside, and a ventilation pipe 102 having a cylindrical shape with both ends opened and having a convex portion facing toward the center of the air passage 101 is provided. Ring 1 with recesses at opposite positions on the outer circumference
03 is attached to the ring 103 so that the holes 1
04 are provided in two places, and the support pin 10 is provided in the hole 104.
Two 5 are inserted in parallel, and a semi-disk shaped damper 106 is inserted in the support pin 105.

A disk-shaped frame 107 is provided around one end of the ventilation tube 102, and the ventilation tube 10 is attached to the frame 107.
The hood mounting plate 108 is welded so as to be opposed to 2 in parallel, and the metal fitting 109 is welded to the side facing the other end of the ventilation tube 102.

A coil spring 11 is provided between the metal fittings 109.
0, stopper 111 and thermal fuse 112 are arranged,
The stopper 111 is U-shaped so as to stop the damper 106 from closing. And the support pin 1
A coil spring 110 was screwed onto the shaft 05 to close the damper 106.

[0006]

In such a conventional fireproof damper, when a fire or the like occurs, the thermal fuse 112 is melted by the heat of the fire and the damper 106 is closed to serve as a fireproof. However, in order to use it again as a fireproof damper, it was necessary to replace the thermal fuse 112, the damper 106 and the like.

However, the damper 106 is the ventilation tube 1
Since it is attached to the ring 103 attached to the No. 02 via the support pin 105, the whole ventilation tube 102 was removed and the damper 106 was disassembled and replaced with a new damper, so it takes a lot of time to replace the parts. There were challenges.

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and it is a first object of the present invention to provide a fireproof damper in which the damper body and the damper portion can be freely attached and detached to facilitate the replacement of parts.
The purpose of.

A second object is to increase the contact area between the support portion of the damper ring and the support shaft for stable support.

A third object is to make the partition plate detachable and remove the partition plate without removing the frame fixed to the wall to facilitate the replacement of parts.

A fourth object is to facilitate the return of the damper by being guided by the guide piece of the damper ring.

A fifth object of the present invention is to make the hook metal fitting of the thermal fuse easy to grip, to eliminate the need for a metal fitting for return, and to manufacture it at low cost.

A sixth object is to provide an insertion groove in the partition plate so that two positions on the outer periphery of the damper ring are brought into contact with each other so that the damper ring does not come out to the outside of the room and the positioning of the damper ring is facilitated. It is in.

[0014]

In the fireproof damper of the present invention, a tubular mounting frame is provided outside one end,
Partitioning the center in the partition plate, and a damper body formed with air passage on both sides of the partition plate, a shape for opening and closing each of the air passage formed on both sides of the partition plate, it closed freely coil spring and the support acts provided the shaft to be freely opened and closed through the
A damper part formed by a damper plate and a damper ring mounted on the damper body, and a temperature fuse provided between the damper plate and the partition plate are provided, and the damper part is detachably provided on the damper body. It is a thing.

According to the present invention, it is possible to provide a fireproof damper in which the damper body and the damper portion can be freely attached and detached, and the parts can be easily replaced.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is tubular and provided with a mounting frame on the outside of one end, the center is partitioned by partition plates, and ventilation paths are formed on both sides of the partition plate. Damper body and each ventilation passage formed on both sides of the partition plate
Damper shape for opening and closing, respectively, provided to freely open and close via the coil spring and the support shaft acting closure without permission of
A damper unit which is formed by the damper ring mounted on the damper body and over plates, and a thermal fuse provided in the damper plate and the partition plates, detachably provided on the damper unit to the damper body This is a structure of a fireproof damper, and when a fireproof damper installed on a wall or the like receives the heat of a fire to replace a deformed damper plate, etc., remove the damper part from the damper body. The damper plate provided on the damper portion can be replaced, and the damper body does not have to be removed from the wall portion, so that the parts can be easily replaced.

FIG. 1 is a block diagram of an embodiment of the present invention.
-It demonstrates, referring FIG. (Embodiment 1) As shown in FIGS. 1 and 2, a mounting frame 1 is provided in a tubular shape outside one end, and a partition plate 2 is provided at the center.
A damper main body 4 having a semicircular ventilation passage 3 formed on both sides of the partition plate 2 is formed. The support plate 7 is provided to form the damper plate 8, and the support shaft 5 is passed through the insertion hole 6 provided in the coil spring 9 and the support plate 7 of the damper plate 8 which act on the damper plate 8 arbitrarily. Damper ring 1 in which both ends of the damper ring are mounted inside the damper body 4
The damper portion 12 is formed by supporting the same through the support portion 11.

The damper plate 8 has a thermal fuse 1
A hook metal fitting 14 for hooking one end of 3 is provided, a damper portion 12 formed by a damper ring 10 having a damper plate 8 mounted therein is mounted in the damper main body 4, and the damper main body 4 is detachably attached with a screw 15. The other side of the temperature fuse 13 hooked on the hooking metal fitting 14 provided on the No. 8 is attached to the metal fitting 16 provided on the partition plate 2.

In the above-mentioned structure, when a fire or the like is generated in the fire damper mounted at a predetermined position through the mounting frame 1 and the heat of the temperature fuse 13 melts, the coil spring 9 acts as a closure. The damper plate 8 is closed and the ventilation passage 3 is closed, so that the adjacent chamber and the like are prevented from being burnt.

Then, when replacing the member of the fireproof damper in a state where the thermal fuse 13 is melted and the damper plate 8 is damaged, the screw 15 is loosened to remove the damper portion 12 from the damper body 4, and the damper portion is removed. Damper plate 8 and thermal fuse 13 incorporated in 12
And the damper part 12 is mounted and attached to the damper body 4, and the other part of the thermal fuse 13 is attached and held to the metal fitting 16 provided on the partition plate 2 with the damper plate 8 opened, thereby completing the replacement of the parts. Becomes

As described above, according to the fireproof damper of the first embodiment of the present invention, the damper ring 1 provided with the damper plate 8 is provided.
Since the damper unit 12 made of 0 is detachably provided in the damper body 4 forming the ventilation passage 3, the damper unit 12 can be easily detached from the damper body 4 when replacing the component. You can

(Second Embodiment) As shown in FIGS. 3 and 4, the support portion 11A of the support shaft 5 inserted into the insertion hole 6 of the support piece 7 provided on the damper plate 8 is attached to the damper ring 10A.
It is formed into a cylindrical shape that protrudes inward by burring or the like.

In the above-mentioned structure, the support shaft 11 for supporting the damper plate 8 so as to be openable and closable is formed into a cylindrical support portion 11A.
It will be retained in a state of being inserted inside.

As described above, according to the fireproof damper of the second embodiment of the present invention, since the support portion 11A of the support shaft 5 provided on the damper ring 10A is formed into a cylindrical shape by burring or the like, the contact area with the support shaft 5 is increased. Is increased, and the damper plate 8 provided on the support shaft 5 is held in a stable state.

(Embodiment 3) As shown in FIG. 5, an L-shaped portion 17 is formed at the end of the partition plate 2A, and is detachably attached to the attachment frame 1A with a screw 18.

In the above structure, when the fire damper is mounted on the wall or the like through the mounting frame 1A, when the damper plate 8 and the thermal fuse 13 are replaced, the screw 18 is loosened and removed. As a result, the partition plate 2A is removed from the damper body 4, and the screw 15
The damper portion 12 is removed from the damper main body 4 by loosening and removing.

As described above, according to the fireproof damper of the third embodiment of the present invention, since the partition plate 2A is detachably provided on the mounting frame 1A, the damper plate 8 incorporated in the fireproof damper and the thermal fuse. When the parts such as 13 are to be replaced, the partition plate 2A and the damper part 12 can be removed while the damper body 4 is attached to the wall part or the like, and the parts can be easily replaced.

(Embodiment 4) As shown in FIGS. 6 and 7, the damper plate 8 which faces the damper plate 8A when it is closed.
The damper ring 1 is provided with a guide piece 20 corresponding to both end portions 19 of the facing surface of A and serving as a guide when the damper plate 8A is returned.
Bend inside 0B.

In the above structure, when the damper plate 8A is returned to the open state at the time of replacing parts, the guide piece 20 provided on the damper ring 10B has the damper plate 8A.
Corresponding to both ends 19 of A, both ends 19 can be guided to open the damper plate 8A.

As described above, according to the fireproof damper of the fourth embodiment of the present invention, the damper plate 8A is used at the time of parts replacement or the like.
When returning to the open state, both ends 19 of the damper plate 8A are guided by the guide pieces 20 provided on the damper ring 10B, and the damper plate 8A can be smoothly moved in a stable state.

(Fifth Embodiment) As shown in FIGS. 8 and 9, the shape of a hook metal 14A provided on the damper plate 8B so that one end of the thermal fuse 13 is hooked is pinched with a finger to restore the damper plate 8B. The configuration is such that it is possible.

In the above structure, after the thermal fuse 13 is replaced with a new one, when the damper plate 8B is returned to the open state, the hook metal fitting 14A provided on the damper plate 8B is held by the finger and opened. Fuse 1
The other side of 3 is connected to the partition plate 2 and the damper plate 8B is held in an open state via the thermal fuse 13.

As described above, according to the fireproof damper of the fifth embodiment of the present invention, since the hook metal fitting 14A of the temperature fuse 13 provided on the damper plate 8B is shaped so that the finger grip can be used to move the damper plate 8B. It is not necessary to separately provide a return fitting or the like for returning the damper plate 8B to the open state when replacing the parts of the fuse 13, so that the cost can be reduced.

(Embodiment 6) As shown in FIG. 10, the partition plate 2B is provided with an engaging groove 21 for positioning the damper ring 10 for positioning.

In the above structure, the partition plate 2B and the damper ring 10 can be positioned relative to each other via the engaging groove 21.

As described above, according to the fireproof damper of the sixth embodiment of the present invention, since the engaging groove 21 with which the damper ring 10 is engaged is provided in the partition plate 2B, the partition plate 2B and the damper ring 10 are fixed. Can be set in position.

[0037]

As is apparent from the above embodiments,
According to the present invention, a tubular body is provided with a mounting frame on the outside of one end, the center is partitioned by partition plates, and a damper main body is formed on both sides of the partition plate, and a damper body is formed on both sides of the partition plate.
In shape for opening and closing each of the air passage, it closed freely through the coil spring and the support shaft acting freely opened and closed is provided et al
A damper part formed by a damper plate and a damper ring attached to the damper body, and a temperature fuse provided between the damper plate and the partition plate, and the damper part is detachably provided on the damper body. Therefore, it is possible to provide a fireproof damper that can facilitate replacement of parts.

Further, since the support portion of the support shaft is formed into a cylindrical shape by a burring process or the like on the damper ring in which the damper plate is openably and closably provided via the support shaft, the contact area with the support portion supporting the support shaft is formed. Therefore, the damper plate can be supported in a stable state via the support shaft.

Further, since the partition plate provided on the damper main body is detachably provided, the parts can be easily replaced without removing the damper main body attached to the wall or the like.

Further, since the damper ring is provided with the guide pieces corresponding to both ends of the facing surfaces of the damper plate facing each other when the damper plate is closed, the damper plate at the time of returning the damper plate is provided. Can be easily moved.

Further, since the shape of the hook metal provided on the damper plate so that one end of the thermal fuse can be hooked is such that the damper plate can be returned by pinching it with a finger, a separate metal plate for returning the damper plate is provided. It is not necessary and can be made at low cost.

Further, since the partition plate is provided with the engagement groove for positioning the damper ring, it is possible to prevent the damper ring from coming out and to position the damper ring.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a fire protection damper according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the configuration of the fire protection damper.

FIG. 3 is a perspective view showing a configuration of a damper ring of the fire protection damper according to the second embodiment of the present invention.

FIG. 4 is a partially cutaway front view showing a structure of a damper portion of the fire protection damper.

FIG. 5 is a perspective view showing a structure of a fire protection damper according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing a relationship between a damper ring and a damper plate according to a fourth embodiment of the present invention.

FIG. 7 is a front view showing the relationship between the damper ring and the damper plate.

FIG. 8 is a perspective view showing a configuration of a damper plate according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view showing the configuration of the fire protection damper.

FIG. 10 is a sectional view showing a relationship between a damper ring and a partition plate according to a sixth embodiment of the present invention.

FIG. 11 is a perspective view of a conventional fire damper.

FIG. 12 is a perspective view showing a state when the damper plate of the fire protection damper is returned to the open state.

[Explanation of symbols]

1 Mounting frame 2 partition boards 2A partition board 2B partition board 3 Ventilation path 4 damper body 5 Support shaft 8 damper plate 8A damper plate 8B damper plate 9 coil spring 10 damper ring 10A damper ring 11A support 12 Damper part 13 Thermal fuse 14A Hook bracket 19 both ends 20 guide pieces 21 engagement groove

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A62C 2/14 F24F 13/15

Claims (6)

(57) [Claims] 1. A damper main body, which is tubular and has a mounting frame provided outside one end, is partitioned by a partition plate at the center, and has ventilation passages formed on both sides of the partition plate, and is formed on both sides of the partition plate.
In shape for opening and closing each of the air passage, it closed freely through the coil spring and the support shaft acting freely opened and closed is provided et al
A damper part formed by a damper plate and a damper ring attached to the damper body, and a temperature fuse provided between the damper plate and the partition plate, and the damper part is detachably provided on the damper body. Fireproof damper. 2. A damper plate provided with a damper plate which can be opened and closed via a support shaft by burring or the like,
The fire protection damper according to claim 1, wherein the support portion of the support shaft is formed in a tubular shape. 3. The fire damper according to claim 1, wherein a partition plate provided on the damper body is detachably provided. 4. The damper ring is provided with guide pieces corresponding to both ends of the facing surfaces of the damper plate facing each other when the damper plate is closed, and provided on the damper ring. Fire damper. 5. The damper according to claim 1, 2, 3 or 4, wherein the shape of the hook metal provided on the damper plate so that one end of the thermal fuse is hooked is such that the damper plate can be restored by pinching with a finger. Fire damper. 6. The fireproof damper according to claim 1, 2, 3, 4, or 5, wherein the partition plate is provided with an engagement groove for engagement with a damper ring for positioning.