JP6475951B2 - Damper device having pressure adjusting function and fire door provided with damper device having pressure adjusting function - Google Patents

Description

  The present invention relates to a damper device having a pressure adjustment function provided in a fire prevention section between an adjoining room adjacent to a special evacuation staircase or an emergency elevator boarding / exiting lobby and an adjoining room such as a hallway, and pressure adjustment The present invention relates to a fire door equipped with a damper device having a function.

In various buildings, in order to secure an evacuation route in the event of a fire, an auxiliary room is provided between a special evacuation staircase or an emergency elevator and an adjacent room such as a corridor. Here, in the case of an emergency elevator, the attached room also serves as an emergency elevator entry / exit lobby. When a fire occurs in a room facing an adjacent room such as a corridor, the pressure in the attached room is increased from the outside to the corridor by sending air from outside air into the attached room with a fan and pressurizing it. The leaked smoke is prevented from entering the attached room.
In addition, a fire door is provided between the attached room and the hallway, and when a fire breaks out, the fire door is opened and evacuated from the hallway through the attached room using a special escape staircase or an emergency elevator.

  The fire door opens from the corridor side to the attached room side according to the evacuation direction of the evacuees. At the time of evacuation, as described above, the pressure in the attached room is higher than the pressure in the corridor, so that the pressure that presses the fire door against the corridor acts due to the differential pressure. As a result, if the differential pressure between the attached room and the corridor is excessive, a large force is required to open the fire door, making it difficult to open the fire door.

Therefore, in order to prevent the differential pressure between the attached room and the hallway from becoming excessive, the air volume of the fan supplied to the attached room is controlled, or the differential pressure damper is installed on the wall facing the hallway in the attached room and supplied. Part of the air is released to the corridor.
However, in the former method, since the differential pressure between the attached room and the hallway must be detected by a sensor to control the operation of the fan, the control system becomes complicated. In the latter method, it is necessary to secure an installation space for the differential pressure damper, and it is necessary to reinforce the wall in order to support the weight of the differential pressure damper.

On the other hand, Patent Document 1 discloses a configuration in which a door includes a damper that can be opened and closed and a panic bar that opens and closes the damper. In this configuration, by pushing down the panic bar, the damper opens and an opening is formed in the door. When air flows out from the attached room side to the corridor side through the opening, the differential pressure between the attached room side and the corridor side is reduced, and the fire door can be easily opened.
By adopting such a configuration, a complicated system for detecting and controlling the differential pressure between the attached room and the corridor becomes unnecessary. Moreover, since the fire door is equipped with a damper, it is not necessary to install it on the wall.

JP-A-8-93346

However, in the configuration described in Patent Document 1 described above, the pressure in the attached room is higher than that in the hallway until the damper is opened and the fire door is opened.
Therefore, it is necessary to configure the walls and ceilings constituting the attached rooms so as to be able to withstand high pressure, and the member cost and construction cost constituting the attached rooms are increased. Further, when the emergency elevator is provided facing the attached room, if the pressure in the attached room is increased, excessive pressure is also applied to the door of the emergency elevator, so that the open / close door is difficult to slide.

  Further, in the configuration described in Patent Document 1, if the operation of pushing down the panic bar is insufficient, the opening is not fully opened, and the differential pressure between the attached room and the corridor cannot be sufficiently reduced. is there. Then, it becomes difficult to open the fire door.

  An object of the present invention made therefor is a damper device having a pressure adjustment function capable of reliably and easily opening a fire door while suppressing an excessive increase in the pressure in the chamber while having a simple configuration, and a pressure It is providing the fire door provided with the damper apparatus which has an adjustment function.

The present invention employs the following means in order to solve the above problems.
That is, the present invention is a damper device having a pressure adjusting function provided between an attached chamber and an adjacent chamber adjacent to the attached chamber, and is opened and closed by a differential pressure between the attached chamber and the adjacent chamber. A blade, a connecting member connected to the opening and closing blade, and a driven blade connected to the opening and closing blade via the connecting member and driven to open and close in conjunction with opening and closing of the opening and closing blade. To do.
According to such a configuration, in the event of a fire, if the pressure in the special evacuation staircase that forms the attached room or the attached room of the emergency elevator is increased, there is a difference between the adjacent room such as a corridor outside the attached room. Pressure is generated. When this differential pressure increases, the opening / closing blade is pressed and the opening / closing blade opens. Then, the opening / closing blade opening operation is transmitted to the driven blade via the connecting member, and the driven blade opens in conjunction with the opening / closing blade. When the differential pressure is reduced, the opening / closing blade rotates in the closing direction, and the driven blade is closed in conjunction with this.
In this way, it is possible to configure a damper device that opens and closes with a simple configuration without using a motor or a control unit.
Then, by opening the opening / closing blade and the driven blade of such a damper device, it is possible to reduce the differential pressure between the attached chamber and the adjacent chamber, and to suppress the pressure in the attached chamber from becoming excessively high.

The opening / closing blade may include a torque adjustment mechanism that applies a resistance force in a direction against a pressure due to a differential pressure between the attached chamber and the adjacent chamber.
According to such a configuration, when the rotational moment acting on the open / close blade due to the differential pressure between the attached chamber and the adjacent chamber becomes larger than the rotational moment acting on the open / close blade due to the resistance force provided by the torque adjustment mechanism, the open / close blade Opens. In this way, the opening timing (pressure) of the opening / closing blade and the driven blade can be set.

The resistance force of the torque adjusting mechanism may be set so that the driven blade is fully opened when the pressure in the chamber reaches a predetermined set pressure.
Thereby, when the pressure in the attached chamber reaches the set pressure, the amount of ventilation from the attached chamber to the adjacent chamber can be effectively secured by fully opening the driven blade.

The first connecting arm extending from the opening / closing blade and the connecting member are rotatably connected by pin connection, and the driven blade and the connecting member are respectively connected to both ends of the second connecting arm by pin connection. The follower blades may be fully opened when the pressure in the attached chamber reaches a preset pressure that is pivotally connected.
With such a configuration, the driven blade opens in conjunction with the open / close blade, and when the pressure in the attached chamber increases and reaches the set pressure, the driven blade is fully opened.

The opening / closing blade and the driven blade may be provided so as to be rotatable around a rotation axis extending in the vertical direction.
When the rotation shaft is provided so as to extend in the horizontal direction, the weights of the opening / closing blades and the driven blades act on the rotation shaft, so that the rotation operations of the opening / closing blades and the driven blades become heavy. On the other hand, by providing the rotation shaft so as to extend in the vertical direction, the load is supported at the lower ends of the opening and closing blades and the driven blades. Thereby, the rotation operation of the opening / closing blade and the driven blade can be lightened, and the opening / closing blade and the driven chamber can be reliably opened / closed by the differential pressure between the attached chamber and the adjacent chamber.

The driven blade may include symmetrical blade bodies on both sides of a rotating shaft that rotatably supports the driven blade.
In this way, even if the differential pressure between the attached chamber and the adjacent chamber acts on the driven blade, the differential pressure is applied to the blade body on one side of the rotating shaft and the blade body on the other side of the rotating shaft. Therefore, the force for rotating the driven blade is not generated by this differential pressure. As a result, the driven blade is reliably rotated in conjunction with the rotating operation of the opening / closing blade.

The fire door of the present invention is characterized in that it includes a damper device that partitions the attached chamber and the adjacent chamber and has the pressure adjusting function as described above.
By providing the damper device having the pressure adjusting function as described above in the fire door, it is not necessary to provide the damper device separately from the fire door. When the damper device is provided separately from the fire door, the installation space is required, and the wall or the like on which the damper device is provided needs to be reinforced in order to support the weight of the damper device. However, if a damper device having a pressure adjusting function is provided on the fire door, installation space and reinforcement are not required.

The fire door of the present invention may be composed of a plurality of door bodies having different areas, and the damper device may be provided on the door body having a small area.
Thus, if a damper apparatus is provided in a door body with a small area, a door body with a large area can be lightened and this big door body can be opened easily. Thereby, it becomes possible for an evacuee to evacuate easily by opening a large door.

  ADVANTAGE OF THE INVENTION According to this invention, although it is a simple structure, it can suppress that the pressure in a chamber becomes high too much, and it becomes possible to open a fire door reliably and easily.

It is a top view which shows the condition where the fire door provided with the damper apparatus which has a pressure adjustment function which concerns on this embodiment was arrange | positioned in the building. It is a front view of a fire door. It is a figure which shows the damper apparatus with which the fire door was equipped, and is a plane sectional view which shows the fully closed state of a damper apparatus. It is a figure which shows the damper apparatus with which the fire door was equipped, and is a plane sectional view which shows the fully open state of a damper apparatus.

DESCRIPTION OF EMBODIMENTS Hereinafter, a damper device having a pressure adjusting function according to the present invention and a fire door provided with a damper device having a pressure adjusting function according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a plan view showing a state in which a fire door provided with a damper device having a pressure adjusting function according to the present embodiment is arranged in a building. FIG. 2 is a front view of the fire door. FIG. 3 is a diagram showing the damper device provided in the fire door, and is a cross-sectional plan view showing the fully closed state of the damper device. FIG. 4 is a view showing the damper device provided in the fire door, and is a cross-sectional plan view showing the fully opened state of the damper device.
As shown in FIG. 1, the fire door 10 is provided between the adjoining room 2 and the adjoining room 2 such as a corridor facing the plural rooms 1 and the adjoining room 3. It has been.
Here, a special evacuation staircase 4 and an emergency elevator 5 are provided in the attached room 3.
Further, the auxiliary chamber 3 is provided with an air supply port 6 connected to an air supply fan (not shown) through a duct (not shown), and outside air can be taken into the auxiliary chamber 3 through the air supply port 6. It can be done.

  As shown in FIGS. 1 and 2, the fire door 10 includes a main door (door body) 11 and a child door (door body) 12. The main door 11 and the child door 12 are juxtaposed in the horizontal direction, and one side end portion 11a of the main door 11 and one side end portion 12a of the child door 12 are provided to face each other. The other side end portion 11b of the main door 11 and the other side end portion 12b of the child door 12 are supported so as to be rotatable around a vertical axis via hinges (not shown). Thereby, the main door 11 and the child door 12 can be opened and closed in a so-called double door.

  The main door 11 has a larger width dimension than the child door 12, and the refugee ensures the evacuation route mainly by opening the main door 11.

As shown in FIG. 3, the child door 12 is provided with a damper device 20. The damper device 20 includes a plurality of blades 21 provided side by side along one width direction of the child door 12, a connecting member 22 that connects the plurality of blades 21, and a torque adjustment mechanism 23.
The damper device 20 is provided inside the outer frame portion 13 that forms the outer peripheral portion of the child door 12. Further, the blade 21, the connecting member 22, and the torque adjustment mechanism 23 constituting the damper device 20 are configured such that the side facing the adjacent chamber 2 and the side facing the auxiliary chamber 3 in the child door 12 are the ventilation cover 17. Covered by. The ventilation cover 17 is formed with a number of slits, holes, openings, and the like large enough to prevent a finger from entering, so that the finger does not touch the damper device 20 while ensuring air permeability. The ventilation cover 17 is provided with an outer peripheral portion fixed to the outer frame portion 13.

  Among the plurality of blades 21, for example, blades (rotary blades) 21A provided on one side end 12a side of the child door 12 have the same blade cross-sectional shape continuously formed in the vertical direction. This blade | wing 21A is rotatably provided around the rotating shaft 24 extended in a perpendicular direction. The blade 21A is integrally provided with a blade portion (blade body) 25 extending along the horizontal direction from the rotating shaft 24 side.

  A torque adjusting mechanism 23 is connected to the rotating shaft 24 of the blade 21A. The torque adjustment mechanism 23 includes a hydraulic damper, a spring, and the like, and exhibits a resistance force in the opposite rotation direction when the rotation shaft 24 rotates in one rotation direction. As will be described later, the torque adjusting mechanism 23 urges the blade 21A in a direction to close the blade 21A in the opposite direction when the blade 21A rotates in the opening direction.

  Of the plurality of blades 21, blades (driven blades) 21 </ b> B other than the blades 21 </ b> A are provided so as to be rotatable around a rotation shaft 27 extending in the vertical direction. Each blade 21B has the same blade cross-sectional shape in the vertical direction, and includes blade portions (blade bodies) 28 extending from the rotation shaft 27 side along both sides in the horizontal direction.

The blade 21 </ b> A and the other blade 21 </ b> B are connected via the connecting member 22 as follows.
A connecting arm 30 extending toward the connecting member 22 is fixed to the base of the tip blade portion 26 of the blade 21A. A distal end portion of the connecting arm 30 is rotatably connected to the connecting member 22 via a pin 31.
In each blade 21 </ b> B, one end of a connecting arm 32 is rotatably connected to the end of the blade portion 28 on the side away from the blade 21 </ b> A via a pin 33. The other end of the connecting arm 32 is rotatably connected to the connecting member 22 via a pin 34. The connecting member 22 extends in the width direction of the child door 12, and the plurality of blades 21 </ b> B are connected via the connecting arm 32 at intervals in the horizontal direction.

  As shown in FIG. 4, when the blade 21 </ b> A rotates around the rotation shaft 24, the connection arm 30 provided integrally with the blade 21 </ b> A rotates about the rotation shaft 24, thereby rotating to the connection arm 30. The connecting member 22 connected to is moved in parallel. By the movement of the connecting member 22, the blade portion 28 of the blade 21 </ b> B that is rotatably connected to the connecting member 22 via the connecting arm 32 is pulled, and each blade 21 </ b> B rotates around the rotation shaft 27.

In this way, the damper device 20 opens and closes by rotating the other blades 21B in conjunction with the rotation of the blades 21A. At this time, as shown in FIG. 3, when the damper device 20 is in the closed state, the tip end portion of the blade portion 28 of the blade 21 </ b> B adjacent to the tip blade portion 26 of the blade 21 </ b> A, and the blade portions of the blades 21 </ b> B and 21 </ b> B adjacent to each other. When the front end portions of 28 are close to each other, one side (adjacent chamber 2 side) and the other side (attached chamber 3 side) of the child door 12 are partitioned. Thereby, the differential pressure | voltage between the adjacent chamber 2 side and the attached room 3 side is maintained, and the penetration | invasion of the smoke to the attached room 3 is prevented.
As shown in FIG. 4, when the damper device 20 is in the open state, the blades 21A rotate from the closed state to the adjacent chamber 2 side. When the blades 21 </ b> A are in the open state, the other blades 21 </ b> B that are linked via the connecting member 22 have the tip portions of the one blade portions 28 positioned on the adjacent chamber 2 side, and the other blade portions 28. The distal end is located on the side of the attached chamber 3 and is fully opened.
The blade 21A is in a balanced state while maintaining a certain angle by the torque adjusting mechanism 23. In this balanced state, the blade 21B connected to the blade 21A via the connecting member 22 and the connecting arms 30 and 32 is fully opened in conjunction with the blade 21A, so that the opening area of the damper device 20 is widened. It becomes possible to take.

In such a fire door 10, the main door 11 and the child door 12 are closed in a normal state, and the adjacent room 2 side and the auxiliary room 3 side are partitioned. When the fire door 10 is normally opened, the main door 11 and the child door 12 are closed when the fire detection system detects the occurrence of a fire through the smoke detector or the heat detector.
Further, in the normal state, as shown in FIG. 3, the damper device 20 has the blades 21 </ b> A and the other blades 21 </ b> B fully closed to partition the adjacent chamber 2 side and the auxiliary chamber 3 side.

As shown in FIG. 1, when the fire detection system detects that a fire has occurred due to the operation of a smoke detector or a heat detector, outside air is discharged from the air inlet 6 to the auxiliary room 3 through a duct connected to the air supply fan. Send it in. Then, the inside of the attached chamber 3 is pressurized, and a differential pressure is generated between the adjacent chamber 2 side and the attached chamber 3 side. As shown in FIG. 4, the pressure P <b> 1 from the side of the attached chamber 3 to the side of the adjacent chamber 2 acts on the blade 21 </ b> A of the damper device 20 due to this differential pressure. Due to the pressure P1, a moment to open the blade 21A toward the adjacent chamber 2 is applied to the blade 21A. A resistance force R <b> 1 that urges the blade 21 </ b> A in the closing direction by the torque adjusting mechanism 23 acts. As long as the moment in the direction of closing the blade 21A due to the resistance R1 does not exceed the moment for opening the blade 21A, the blade 21A remains closed.
In this state, the other blade 21B has a differential pressure between the adjacent chamber 2 side and the auxiliary chamber 3 side on one side blade portion 28 and the other side blade portion 28 across the rotation shaft 27, respectively. A pressure P1 due to the above acts. Therefore, the force which rotates this other blade | wing 21B does not arise.
Thus, when the damper device 20 is in the fully closed state, the differential pressure between the adjacent chamber 2 side and the attached chamber 3 side is maintained, and the intrusion of smoke into the attached chamber 3 is prevented.

As shown in FIG. 4, the differential pressure between the adjacent chamber 2 side and the attached chamber 3 side increases, and the moment due to the pressure P1 from the attached chamber 3 side acting on the blades 21A toward the adjacent chamber 2 side is the torque adjustment. When the moment due to the resistance force R1 of the mechanism 23 increases, the blade 21A rotates in the opening direction. Here, the resistance force R1 of the torque adjusting mechanism 23 is set so that the blade 21A starts to open when the differential pressure between the adjacent chamber 2 side and the attached chamber 3 side exceeds the first set pressure (for example, 30 Pa). It is preferable to set.
Then, the other blade 21 </ b> B rotates in a direction to open around the rotation shaft 27 by the connecting member 22 moved by the blade 21 </ b> A.

  When the pressure in the attached chamber 3 further increases and reaches a preset second set pressure (for example, 50 Pa), the resistance of the torque adjusting mechanism 23 is such that the blade 21A opens to a predetermined angle and the blade 21B is fully opened. R1 is preferably set.

  In this way, the damper device 20 opens, air flows from the side of the attached chamber 3 to the adjacent chamber 2 side, and the differential pressure between the attached chamber 3 and the adjacent chamber 2 side is suppressed. Thereby, the main door 11 and the child door 12 can be easily opened.

  When the blade 21A and the blade 21B are opened as described above, when the moment due to the pressure P1 generated by the differential pressure acting on the blade 21A and the moment due to the resistance force R1 of the torque adjusting mechanism 23 are balanced, the blade 21A and the blade 21B. Stops opening. And if the differential pressure which acts on the blade | wing 21A raises / lowers from the state, according to the magnitude relationship of a moment, the blade | wing 21A, 21B will rotate further in the direction which opens or closes.

As described above, the damper device 20 is connected via the connecting member 22 to the blade 21A that opens and closes by the differential pressure between the attached chamber 3 and the adjacent chamber 2, the connecting member 22 connected to the blade 21A, and the blade 21A. The blade 21B is driven to open and close in conjunction with the opening and closing of the blade 21A.
According to such a configuration, it is possible to configure the damper device 20 that opens and closes with a simple configuration without using a motor or a control unit.
And the blade | wing 21A and the blade | wing 21B of such a damper apparatus 20 open / close automatically according to the pressure of the chamber 3 irrespective of the opening / closing operation | movement of the fire door 10, and the pressure of the chamber 3 becomes excessively high. Can be suppressed. Thereby, although it is a simple structure, there is no need to increase the strength in the attached chamber 3 in particular, it is possible to suppress the pressure in the attached chamber 3 from becoming excessively high, and to open the fire door 10 reliably and easily. It becomes.

Further, the blade 21 </ b> A includes a torque adjusting mechanism 23 that applies a resistance force R <b> 1 in a direction against the pressure P <b> 1 due to the differential pressure between the attached chamber 3 and the adjacent chamber 2. Accordingly, when the moment acting on the blade 21A due to the differential pressure between the attached chamber 3 and the adjacent chamber 2 becomes larger than the moment acting on the blade 21A due to the resistance force R1 applied by the torque adjusting mechanism 23, the blade 21A opens. In this way, the timing (pressure) at which the blades 21A and 21B open can be set.
When the pressure in the attached chamber 3 reaches a preset first set pressure (for example, 30 Pa), the blade 21A starts to open, and when the pressure reaches the second set pressure, the blade 21A and the blade 21B are fully opened. In this manner, the damper device 20 can be set so as to be surely opened at a predetermined pressure.

The resistance force of the torque adjusting mechanism 23 is set so that the blade 21B is fully opened when the pressure in the attached chamber 3 reaches a predetermined second set pressure.
Thereby, it can prevent reliably that the pressure in the attached chamber 3 becomes high too much. Moreover, by ensuring that the blades 21B are fully opened, the area of the damper device 20 can be kept small while ensuring the required airflow.

  Further, the blade 21A and the blade 21B are provided so as to be rotatable around rotary shafts 24 and 27 extending in the vertical direction. When the rotary shafts 24 and 27 are provided so as to extend in the horizontal direction, the own weights of the blades 21A and 21B act on the rotary shafts 24 and 27, so that the rotating operation of the blades 21A and 21B becomes heavy. On the other hand, by providing the rotary shafts 24 and 27 so as to extend in the vertical direction, the load is supported at the lower ends of the blades 21A and 21B. Thereby, rotation operation of the blades 21A and the blades 21B can be lightened, and can be reliably opened and closed by the differential pressure between the attached chamber 3 and the adjacent chamber 2.

  Further, the blade 21 </ b> B is provided with symmetrical blade portions 28 on both sides of the rotation shaft 27. In this way, even if the differential pressure between the attached chamber 3 and the adjacent chamber 2 acts on the blade 21 </ b> B, the blade portion 28 on one side of the rotating shaft 27 and the blade portion 28 on the other side of the rotating shaft 27. In addition, since a differential pressure acts on each of them, a force for rotating the blade 21B is not generated by this differential pressure. Thereby, the blade | wing 21B rotates in response to a rotation operation | movement of the blade | wing 21A reliably.

  Furthermore, the fire door 10 described above divides the auxiliary room 3 and the adjacent room 2 and includes the damper device 20 as described above. Thereby, it is not necessary to provide the damper device 20 separately from the fire door 10. When the damper device 20 is provided separately from the fire door 10, the installation space is required, and a wall or the like on which the damper device 20 is provided needs to be reinforced in order to support the weight of the damper device 20. However, if the damper device 20 is provided on the fire door 10, no installation space or reinforcement is required.

  Moreover, the fire door 10 is comprised from the main door 11 and the child door 12 from which an area mutually differs, and the damper apparatus 20 is provided in the child door 12 with a small area. Thus, if the damper apparatus 20 is provided in the small door 12 with a small area, the main door 11 with a large area can be lightened, and this large main door 11 can be opened easily. Thereby, an evacuee can open the large main door 11 and evacuate easily.

(Other embodiments)
Note that the damper device having the pressure adjusting function and the fire door provided with the damper device having the pressure adjusting function of the present invention are not limited to the above-described embodiment described with reference to the drawings, and technically. Various modifications in the range are conceivable.
For example, the number of blades 21B constituting the damper device 20 is not limited at all. Further, a plurality of blades 21A including the torque adjusting mechanism 23 and blades 21B connected to the blades 21A via the connecting members 22 may be provided.

  Further, although the blades 21A and 20B are provided so as to be rotatable around the rotation shafts 24 and 27 extending in the vertical direction, the blades 21A and 20B may be rotated around the horizontal axis.

Moreover, although the fire door 10 is provided with the main door 11 and the child door 12, it is good also as a structure provided with three or more door bodies. Also in that case, it is preferable to provide the damper device 20 in the door body having the smallest area.
Furthermore, the damper device 20 can be provided on a wall other than the fire door 10.
The attached room 3 taken up as a place where the damper device 20 is installed is not limited to the attached room defined by the Building Standard Law, and may be a pressurized room.
In addition to this, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate without departing from the gist of the present invention.

1 room 2 adjoining room 3 ancillary room 4 special escape stairs 5 emergency elevator 10 fire door 11 parent door (door)
12 Child door (door)
20 damper device 21 blade 21A blade (rotary blade)
21B blade (driven blade)
22 Connecting member 23 Torque adjustment mechanism 24, 27 Rotating shaft 26 Tip blade portion 25, 28 Blade portion (blade body)
30 connection arm 31 pin 32 connection arm 33, 34 pin

Claims (7)

A damper device having a pressure adjusting function provided between an attached chamber and an adjacent chamber adjacent to the attached chamber,
An opening and closing blade that opens and closes due to a differential pressure between the attached chamber and the adjacent chamber;
A connecting member connected to the opening / closing blade;
A driven blade connected to the open / close blade via the connecting member and driven to open and close only in conjunction with opening / closing of the open / close blade;
A damper device having a pressure adjusting function.   The pressure adjusting function according to claim 1, wherein the opening / closing blade includes a torque adjusting mechanism that applies a resistance force in a direction against a pressure due to a differential pressure between the attached chamber and the adjacent chamber. Damper device having.   The resistance force of the torque adjusting mechanism is set so that the driven blade is fully opened when the pressure in the chamber reaches a predetermined set pressure. Damper device having a pressure adjusting function. The first connecting arm extending from the opening / closing blade and the connecting member are rotatably connected by pin connection,
The driven blade and the connecting member are connected to both ends of the second connecting arm so as to be rotatable by pin connection,
The damper device having a pressure adjusting function according to claim 3, wherein the driven blade is fully opened when the pressure in the chamber reaches a predetermined set pressure.   The damper device having a pressure adjusting function according to claim 4, wherein the driven blade is provided with symmetrical blade bodies on both sides of a rotating shaft that rotatably supports the driven blade.   A fire door comprising the damper device having the pressure adjusting function according to any one of claims 1 to 5, wherein the attached chamber and the adjacent chamber are partitioned. The fire door according to claim 6, wherein the damper device including a plurality of door bodies having different areas and having the pressure adjusting function is provided on the door body having a small area.

Images