JPH10205874A - Fireproof damper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof damper device which is simple in structure. SOLUTION: A fireproof damper device, which is provided with an air duct 2 having an inspection opening 22 with a cover 4 designed for inside inspection, a blade pivoted turnably inside this air duct 2 and energized in the closing direction inside the air duct 2 with an elastic force and a holding mechanism 9 which keeps the air duct 2 in an open state and includes a temperature fuse which releases the holding of the blade with the sensibility of heat is arranged to be operated at an axial part 4 which pulls out the blade 4 outside the air duct 2. The inspection opening 22 is provided at the position which can check out the state of the blade on the placement side of the holding mechanism 9 so that the holding mechanism 9 may be removed at this inspection opening 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for fire protection which is provided in the middle of a ventilation system and closes the ventilation system at a relevant portion in the event of a fire or the like.

[0002]

2. Description of the Related Art Most of ventilation systems of buildings and apartment houses are formed by ventilation ducts, and it is mandatory to provide a fire prevention damper device for closing the ventilation system in the event of a fire or the like. There are two types of this type of fire protection damper: one at the end of the ventilation system and one at the middle of the ventilation system. The configuration is adopted in which the blades provided in the open state are kept open. The blades are rotatably supported, and a spring force is always applied in a direction to close the ventilation path.

[0003] In a fire damper device attached to the end of the ventilation system, the state of the blades inside can be checked from one open end, and the blades can be rotated from the open end. As shown in JP-A-62-189755, a simple configuration may be used. On the other hand, a fire damper device to be installed in the middle of the ventilation system, once installed, cannot check whether the state of the internal blades is appropriate and can only return the closed blades from the outside. An inspection port is provided on the outer shell so that the state of the internal blades can be checked, so that the replacement of the thermal fuse and the return of the blades can be performed from the outside. FIG. 6 shows a conventional fire damper of this type, which is disclosed in Japanese Utility Model Laid-Open Publication No. 61-85247.

[0004] That is, the shaft of the blade 101 is drawn out of the wind tunnel 102, and an arm 103 is provided at the shaft end. The axis of the blade 101 is urged toward the closing side by a spring, and a stop pin 104 is provided in a rotation plane of an arm 103 provided on the axis. The stop pin 104 regulates the rotation of the shaft against the bias of the spring, and maintains the blade 101 in an open state. The stop pin 104 constitutes a part of the damper operating mechanism 105 and the damper operating mechanism 1
05 is inserted into the wind tunnel 102 through a mounting hole provided in the wind tunnel 102. Damper operating mechanism 105
Is attached to a sleeve-shaped case 106, and a thermal fuse 107 is provided inside the case 106 facing the ventilation hole. The stop pin 104 is urged by a spring in a direction to be retracted, and the thermal fuse 107 projects the stop pin 104 against the urging of the spring. An inspection port 108 is provided outside the wind tunnel 102 at a position where the state of the blade 101 inside can be visually recognized.

[0005]

In the above-mentioned conventional fire-damping device provided in the middle of the ventilation system, the wind tunnel 10
2 requires a mounting hole and an inspection port 108 for mounting the damper operating mechanism 105, which has a problem that the configuration is complicated and the cost is high, and there are many configurations that project outside the wind tunnel 102, For example, when a heat insulating material or the like is adhered to the outer peripheral surface of the wind tunnel 102, there is a problem that the workability is low and a good-looking finish is hardly obtained. In addition, since the thermal fuse 107 is housed in the case 106, the response to heat tends to be slowed, and the return after the operation has to be performed by replacing the entire damper operating mechanism 105, which is complicated and expensive. There is also a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. An object of the present invention is to provide a fire-damping device having a simple structure, and to provide a fire-protection damper device having a small uneven portion on the outer surface. The object of the present invention is to obtain a damper device for fire prevention, to obtain a damper device for fire prevention in which the assembling and returning operation after operation are easy, and to obtain a damper device for fire prevention that can make a thermal fuse function well with a simple configuration. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of the present invention provides a wind tunnel having an inspection port with a lid for inspecting the inside thereof, and a rotatably supported pivot inside the wind tunnel. The blade is biased in the direction to close the inside of the wind tunnel by the elastic force, and the blade is held inside the wind tunnel against the bias of the elastic force to keep the inside of the wind tunnel open and heat sensitive. With respect to a fire damper device having a holding mechanism including a thermal fuse for releasing holding of the blade by the above, the blade can be rotated on a shaft portion drawn out of the wind tunnel, and the inspection port is provided with a holding mechanism. Means are provided at a position on the deployment side where the state of the blade can be checked, and the holding mechanism can be attached and detached at the inspection port.

In order to achieve the above object, a second aspect of the present invention employs means for connecting the lid of the inspection port and the holding mechanism with a heat-resistant cable in the first aspect of the present invention.

In order to achieve the above object, the invention according to claim 3 provides an inspection port in the vicinity of a shaft portion of a blade drawn out of the wind tunnel in the means according to claim 1 or 2. Means for providing a cover that covers the shaft portion of the blade and the inspection port in a lump is adopted.

In order to achieve the above object, the invention according to claim 4 provides an inspection port in the vicinity of a shaft portion of a blade drawn out of the wind tunnel in the means according to claim 1 or 2. A cover is provided for covering the shaft portion of the blade and the inspection port at a time, and means for detachably supporting the holding mechanism with respect to the cover is adopted.

In order to achieve the above object, a fifth aspect of the present invention is directed to a holding mechanism in the means according to any one of the first to fourth aspects, wherein the holding mechanism in the means has a structure in which the entire thermal fuse is exposed in a wind tunnel. The means to do is adopted.

According to a sixth aspect of the present invention, in order to achieve the above object, there is provided an attachment arm for projecting the holding mechanism in the means according to any one of the first to fourth aspects into the wind tunnel from outside the wind tunnel. A fuse locking portion provided inside the wind tunnel of the mounting arm; a swing arm rotatably mounted on the mounting arm with a space between the fuse locking portion; and a swing arm and a fuse locking portion. A temperature fuse for holding the swing arm at a position where the blade is kept open is detachably attached to the swing arm, and the pivot of the swing arm is allowed to rotate from a position where the blade can be held. The swing arm is provided with a play that allows a spring force to reduce the play.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 5 show a fire damper device according to this embodiment. This fire-prevention damper device is installed in the middle of the ventilation duct that constitutes the ventilation system. In the event of a fire, etc., this part of the ventilation system is closed to prevent the spread of fire or to the place where the fire occurs. This is a device that has a function of shutting off the supply of air. The outer shell of the fireproof damper is constituted by a straight tubular wind tunnel 2 having connection ports 1 at both ends for connecting a ventilation duct (not shown). The cross section of the wind tunnel 2 has substantially the same shape as the cross section of the wind tunnel 2 which closes the relevant portion of the wind tunnel 2 when the wind tunnel 2 is crossed and opens the wind tunnel 2 when the wind tunnel 2 is located along the center of the wind tunnel 2. The formed blade 3 is rotatably supported by a shaft 4.

One end of the shaft portion 4 of the blade 3 is drawn out of the wind tunnel 2, and a blade operating lever 5 is provided at the shaft end. The blade 3 includes a spring 6 wound around a shaft 4.
In the free state, the spring 6 is in contact with the stopper wall 7 projecting to a position facing the inner wall of the wind tunnel 2 to close the wind tunnel 2 in the free state. I do. A holding mechanism including a temperature fuse 8 that holds the blade 3 in an open position inside the wind tunnel 2 against the bias of the spring 6 and keeps the inside of the wind tunnel 2 normally open. 9 are incorporated.

As shown in FIG. 2, the holding mechanism 9 has a mounting arm 10 projecting from the outside of the wind tunnel 2 to a center portion of the inside of the wind tunnel 2, and is formed at an inner end of the mounting arm 10 inside the wind tunnel 2. A fuse hooking section 11 and a swing arm 12 mounted on the fuse hooking section 11 at intervals.
The swing arm 12 is attached to the mounting arm 10 by a pin 13 so as to rotate in a plane substantially perpendicular to the mounting arm 10, and one end of the swing arm 12 is configured as a fuse hooking part 14 in parallel with the fuse hooking part 11. At the free ends of the two fuse hooking portions 11 and 14, a hooking structure 15 is provided, respectively.
The temperature fuse 8 is detachably mounted between the fourteen by hooking long holes 16 formed at both ends thereof. The rotation of the oscillating arm 12 is restricted by the mounting of the thermal fuse 8, and the opposite side of the latching structure 15 projects as a holding portion 17 in a direction substantially perpendicular to the mounting arm 10, so that the blade 3 is kept open. Has become.

The holding portion 17 of the swing arm 12 has an upper surface formed as a blade contact surface 18 and an opposing surface formed on a tapered slope 19. A slot 20 is provided in the pivotal support portion of the swing arm 12 with the pin 13 to allow the blade 3 to retreat from a position where the blade 3 can be held to a position where the rotation of the blade 3 is allowed. This play of the swing arm 12 is normally reduced by the spring force of the coil spring 21 mounted between the tip of the swing arm 12 and the vicinity of the fuse hooking section 11 on the mounting arm 10 side. The holding mechanism 9 is attached by an attachment arm 10 so as to be detachable at an inspection port 22 opened near the shaft portion 4 of the blade 3 drawn out of the wind tunnel 2.

The inspection port 22 is provided side by side with the shaft portion 4 of the blade 3 that is drawn out at a position where the state of the blade 3 can be confirmed near the position where the outer end of the blade 3 in the open state is located. . The shaft portion 4 of the blade 3 and the inspection port 22 are
Are collectively covered by a cover 23 attached to the outer peripheral portion of. However, the lever 5 provided at the shaft end is disposed on the surface of the cover 23 and is provided outside the cover 23. An opening is formed in a portion corresponding to the inspection port 22 on the surface of the cover 23, and a lid 24 that can be attached and detached from the outside with a screw is mounted on the opening and closed. The holding mechanism 9 is cantileverly mounted on the side wall of the cover 23 by screwing the base of the mounting arm 10, and the swinging arm 1 protrudes from the inspection port 22 to the inside.
As shown in FIG. 5, the outer end of the blade 3 contacts the blade contact surface 18 on the tip side of the second holding portion 17, and the blade 3 is held in an open state. The base side of the mounting arm 10 of the holding mechanism 9 and the back surface of the lid 24 of the cover 23 are connected by a heat-resistant cable such as a ball chain 25.

The fire damper device having such a configuration is
Even if it is installed in the middle of the ventilation system by the ventilation duct, the state of the inside from the outside, in particular, the state of the blade 3 and the state of the holding mechanism 9 can be visually confirmed through the inspection port 22. Even if the closing operation is performed, it can be restored by an external operation. Since the thermal fuse 8 of the holding mechanism 9 is not housed in a case or the like and is entirely exposed in the wind tunnel 2, the responsiveness to heat functions well. When the thermal fuse 8 of the holding mechanism 9 is blown by heat, the restraint of the swing arm 12 is instantaneously released. As a result, the swing arm 12 is immediately rotated by the spring force urging the blade 3, and loses the function of keeping the blade 3 open. The blades 3 rotate as they are by the bias of the springs 6 and hit the stopper walls 7 so as to cross the inside of the wind tunnel 2 to cut off the flow of air in the relevant portion of the wind tunnel 2 to prevent the spread of fire or a fire spot. It has a fire protection function that shuts off air supply to the vehicle.

To return after the fire prevention operation, the cover 24 of the cover 23 is removed, the inspection port 22 is opened, the screw of the mounting arm 10 is removed, and the entire holding mechanism 9 is pulled out. After replacing the thermal fuse 8 with a new one, the holding mechanism 9 may be replaced by screws as before. Even if the hand is detached from the holding mechanism 9 during the attachment / detachment operation of the holding mechanism 9, the holding mechanism 9 and the lid 24
Are connected by the ball chain 25 and stopped by being caught by the opening of the lid 24, so that the holding mechanism 9 does not fall into the wind tunnel 2 and the returning operation can be performed with confidence. Can be. After the holding mechanism 9 is attached, the blade 3 in the closed state is rotated in the direction indicated by the dashed arrow in FIG. If you let the holding part 17 of the arm 12 slip through,
The blade 3 is maintained in the open state and can be easily returned to the initial state. The state of the blade 3 and the state of the holding mechanism 9 are as follows.
It can be confirmed visually from the inspection port 22.

That is, the swing arm 12 receives the rotating force of the blade 3 when the outer end of the blade 3 hits the slope 19 of the holding portion 17, and moves in the direction of retreating the play by the elongated hole 20. When the force from the blade 3 is no longer received by the passage of the blade 3, the play is reduced by the spring force of the coil spring 21 and the blade 3 can be held. These return operations are also assembly operations at the time of assembly, but can be easily performed as described above. The actuated holding mechanism 9 has the disadvantage that fragments of the thermal fuse 8 remain inside the wind tunnel 2 because the blown thermal fuse 8 is still caught by the fuse hooking portions 11 and 14. Instead, the function can be restored by replacing only the thermal fuse 8, so that the cost required for restoration can be reduced. Further, since there is no need to provide a structure for attaching the holding mechanism 9 separately from the inspection port 22, the wind tunnel 2
Is simplified, and the structure of the holding mechanism 9 itself is also simple, so that reduction in manufacturing cost can be promoted. Further, the outer surface can have only one protruding portion by the cover 23, and since there is no complicated unevenness, even when the wind tunnel 2 is covered with a heat insulating material or the like, the operation of attaching the heat insulating material or the like is easy and good. Can be finished.

The lid 24 may be provided directly on the inspection port 22 of the wind tunnel 2. In this case, the cover 23 may be omitted, and the mounting arm 10 of the holding mechanism 9 may be directly mounted on the outer surface of the wind tunnel 2.

[0022]

As apparent from the above description of the embodiment, according to the first aspect of the present invention, it is possible to obtain a fire protection damper device having a simple structure.

According to the second aspect of the present invention, it is possible to easily perform the assembling and the returning operation after the operation together with the effect according to the first aspect.

According to the third aspect of the present invention, in addition to the effect according to the first or second aspect, a fire damper device having a configuration in which the outer surface has few irregularities can be obtained.

According to the fifth aspect of the present invention, the thermal fuse can function satisfactorily with a simple configuration in addition to the effects according to any one of the first to fourth aspects.

According to the sixth aspect of the present invention, the effect of any one of the first to fourth aspects together with the effect of the assembling and the returning operation after the operation is further facilitated.

[Brief description of the drawings]

FIG. 1 is a front view showing a damper device for fire prevention according to an embodiment.

FIG. 2 is a perspective view showing a holding mechanism of the fire prevention damper device according to the embodiment.

FIG. 3 is a sectional view of a main part taken along line AA in FIG. 1;

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is a sectional view taken along line CC in FIG.

FIG. 6 is a sectional view of a conventional fire damper device.

[Explanation of symbols]

2 wind tunnel, 3 blades, 4 shaft, 6 spring, 8
Thermal fuse, 9 holding mechanism, 10 mounting arm,
11 Fuse latching part, 17 holding part, 20 long hole, 21 coil spring, 22 inspection port, 2
3 covers, 24 covers, 25 ball chains.

Claims (6)

[Claims] 1. A wind tunnel having an inspection port with a lid for inspecting the inside, and rotatably supported in the wind tunnel, and urged by an elastic force in a direction to close the inside of the wind tunnel. A blade, a holding mechanism including a temperature fuse that holds the blade in the wind tunnel against the bias of its elastic force, leaves the wind tunnel open, and releases the holding of the blade by heat. Wherein the blade can be operated to rotate on a shaft portion pulled out of the wind tunnel, and the state of the blade on the side where the holding mechanism is provided with the inspection port can be confirmed. A fire damper device provided at a position, wherein the holding mechanism is detachable at the inspection opening. 2. The damper device for fire prevention according to claim 1, wherein the lid of the inspection port and the holding mechanism are connected by a heat-resistant cable. 3. The fire damper device according to claim 1, wherein an inspection port is provided in the vicinity of a shaft portion of the blade drawn out of the wind tunnel, and the shaft portion of the blade is provided. A fire damper device provided with a cover that covers both the inspection port and the inspection port. 4. The fire damper device according to claim 1, wherein an inspection port is provided in the vicinity of a shaft of the blade drawn out of the wind tunnel, and the shaft of the blade is provided. And a cover for covering the inspection port and the inspection port collectively, and a holding mechanism is detachably supported on the cover. 5. The fire protection damper device according to claim 1, wherein the holding mechanism has a structure in which the entire temperature fuse is exposed in a wind tunnel. 6. A fire damper device according to claim 1, wherein the holding mechanism includes a mounting arm that projects into the wind tunnel from outside the wind tunnel, and the mounting arm includes A fuse hooking portion provided inside the wind tunnel, a swing arm rotatably mounted on the mounting arm at a distance from the fuse hooking portion, and between the swing arm and the fuse hooking portion. A temperature fuse that holds the swing arm at a position where the blade is kept open is detachably mounted, and a pivotal support of the swing arm is moved from a position where the blade can be held to a position where rotation of the blade is allowed. A fireproof damper device in which a play that can be separated is set, and a spring force is applied to the swing arm so as to reduce the play.