JPS635733Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a smoke exhaust port that opens a door leading to a duct to exhaust smoke in the event of a fire, and in particular, the smoke exhaust port that is opened in the event of a fire is returned to its original position by driving a motor. Regarding the smoke exhaust port that can be turned back.

In the event of a fire, conventional smoke exhaust vents release the door that closes the entrance to the smoke exhaust duct using a remote-controlled electric signal or manual operation on site, and open the door using the force of a spring. , smoke from a fire is discharged to the outside, making it easier to secure evacuation routes and extinguish fires.

By the way, the above-mentioned smoke exhaust vents must operate reliably in the event of a fire, so they are normally tested for operation on a regular basis. In order to return the smoke exhaust vent to its original condition, each time a test is conducted, we go to the location where the smoke exhaust vent was installed and manually return the smoke exhaust vent to its original state. Restoring the smoke vent was a hassle.

Furthermore, even in the event of a fire, there may be cases where it is necessary to exhaust smoke in a concentrated manner using a smoke exhaust port installed at a predetermined location depending on the situation of smoke diffusion. There was a problem in that the opened smoke exhaust port could not be returned to its original position remotely, and remote control for efficient smoke exhaustion was not possible.

The present invention was developed in view of the above, and in order to configure the door of the smoke exhaust port to be able to be returned remotely once it has been opened, a wire for returning the smoke exhaust port that is rotatably attached to the motor drive shaft is wound. It consists of a rotated pulley and a clutch means which is screwed into a threaded part formed on the drive shaft when the motor is rotated, and which moves in the axial direction and meshes with the pulley to rotate together, and the wire is rotated. The door can be closed by rolling it up.

Embodiments of the present invention will be described in detail below with reference to the drawings. Figure 1 shows the overall configuration of the smoke exhaust port, where 1 is the smoke exhaust duct, 2 is the smoke exhaust door installed at the end of the smoke exhaust duct, 3 is the rotation axis of the smoke exhaust door, and 5 is the smoke exhaust door. An opening spring for biasing the door in the open state relative to the rotating shaft 3, 6 a shock absorber for buffering the rotational force when opening, 4 a locking device for locking the smoke exhaust door in the closed state, 7 1 is a motor, A is a return mechanism section to be described later, and 16 is a wire that is wound up by a pulley provided in the return mechanism section A and has one end fixed to the smoke exhaust door 2.

In the smoke exhaust port having such a configuration, when the locking device 4 is released by remote control or manual operation in the event of a fire, the smoke exhaust door 2 is moved by the rotating shaft 3 due to the urging force of the opening spring 5. The center is rotated to the position 2' shown by the two-dot chain line and released. At this time,
Since the shock absorber 6 biases the smoke exhaust door 2 in the direction of the closed state, it relieves the opening force of the opening spring 5 and the rotational force due to the door 2's own weight, and opens the smoke exhaust door 2 smoothly. . By opening the smoke exhaust door 2 in this manner, smoke in the room on the left side of FIG. 1 can be introduced into the smoke exhaust duct 1. When smoke evacuation due to fire or opening for operation test is completed, the motor 7 is rotated and the return mechanism section A disconnects the wire 1.
6 can be rolled up to close the smoke exhaust door 2.

Figures 2, 3, and 4 show an embodiment of the above-mentioned return mechanism section A with the smoke exhaust door 2 open, and the second
In the figure, 8 is a decelerator that reduces the rotational speed of the motor 7, 9 is a drive shaft, 10 is a pulley around which wire 16 is wound, 9a is a threaded part formed with a male thread on a part of the drive shaft 9, 11 is a clutch screwed into the threaded portion 9a, 12 is a clutch pawl, and 13 is a clutch pawl 12.
14 is a spring that presses the clutch 11 so as to prevent it from rotating and move toward the pulley. 15 is a support plate for the spring 14, and the case of the return mechanism section A is used.

The connection of the pulley 10 to the rotating shaft is as shown in FIG.
As shown in FIG. 4, a rectangular fitting groove 18 into which the clutch pawl 12 engages is formed in the end surface on the pulley side.

With this configuration, when the locking device 4 of the smoke exhaust door 2 shown in FIG. 1 is released, the pulley 10 rotates as the smoke exhaust door 2 moves to the release position. , the wire 16 is let out as shown in FIG. To restore the smoke exhaust door 2, when the motor 7 is rotated by remote control or the like, its rotation is decelerated by the decelerator 8 and the drive shaft 9 is driven to rotate. At this time, pulley 1
0 does not rotate, but since the clutch 11 is screwed into the threaded portion 9a of the drive shaft 9 and is pressed in the direction of the pulley 10 by the spring 14, as the threaded portion 9a of the drive shaft 9 rotates, It is moved from the state shown in FIG. 2 in the direction of the pulley 10 until the clutch pawl 12 is locked in the fitting groove 18 of the pulley 10. Therefore, the pulley 10 is connected to the clutch 11.
, and is compressed against the end face of the drive shaft 9 by the pressing force of the clutch 11 trying to move, and the clutch 1
1, the pulley 10 starts rotating, and starts winding up the wire 16 until the smoke exhaust door 2 is locked. The motor 7 is stopped by the operation of a limit switch or the like when the smoke exhaust door 2 is closed, and the pressing force when the clutch 11 and pulley 10 rotate together is due to the thrust provided on the end face of the clutch 11. The ball bearing 17 is used to cushion the clutch 11, and to facilitate the disengagement of the clutch 11, which will be described later.

In this way, when the smoke exhaust door 2 is closed by winding the wire 16, the pulley 10 and the clutch 11 are kept in mesh with each other by the clutch pawl 12 even if the motor 7 stops.

After that, when the smoke exhaust door 2 is unlocked again for smoke exhaust or operation test, the motor 7 has stopped, so the pulley 10 and the clutch 11
When the smoke exhaust door 2 is opened, the wire 16 is pulled out by the force of the opening spring 5 (see FIG. 1), and the wire 16 is rotated idly relative to the drive shaft 9, and at this time,
The clutch 11 also rotates, but at the same time as the clutch 11 rotates, the screw portion 9a moves the clutch 11 to the right to disengage the pulley 10 and move as shown in FIG. However, in reality, they are not as far apart as shown.

In addition, in the above-mentioned embodiment, the pulley 10
Although the case where there are four fitting grooves 18 has been described, engagement with the clutch pawl 12 may be facilitated by narrowing the mutual angle and providing a large number of fitting grooves 18.

As explained above, according to the present invention, the closing or opening operation of the smoke exhaust door or fire door can be performed by motor drive, so the restoration work can be automated and easily performed, and remote control is also possible. This makes it easier to test the operation of the system, and in the event of a fire, it is possible to remotely close appropriate smoke exhaust vents for fire prevention or evacuation.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a smoke exhaust port, and FIGS. 2 to 4 are sectional views of essential parts showing one embodiment of the present invention. 1...Smoke exhaust duct, 2, 2'...Smoke exhaust door, 3...
... Rotating shaft, 4 ... Locking device, 5 ... Opening spring, 6 ... Shock absorber, 7 ... Motor, 8 ... Decelerator, 9 ... Drive shaft, 9a ... Threaded part, 10 ... Pulley, 11...Clutch, 12...
...Clutch pawl, 13, 14...Spring, 15
... Support plate, 16 ... Wire, 17 ... Ball bearing, 18 ... Fitting groove, A ... Return mechanism section.

Claims (1)

[Scope of Claim for Utility Model Registration] In the case of a fire, a motor rotates a part of the smoke exhaust port that is unlatched by an electric signal or manual operation and opens the door leading to the duct. a drive shaft, a pulley rotatably and loosely fitted onto the drive shaft, a clutch facing the pulley and threadedly engaged with the threaded portion of the drive shaft; an engaging portion that engages with the clutch when the drive shaft rotates; a pressing means that suppresses rotation of the clutch and moves it toward the pulley when the drive shaft rotates; and a pressing means that has one end fixed to the pulley and the other end fixed to the door. A smoke exhaust vent characterized in that it is provided with a wire that allows a door opened by the force of an opening spring to return to a normal position by being hoisted up by the rotation of the pulley in the event of a fire.