JPS6119793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a smoke-proof shutter with a built-in smoke sensor that closes the smoke-proof shutter in an analog manner according to the amount of smoke generated in the event of a fire.

The smoke shutter of conventional automatic fire alarm equipment is
As shown in FIG. 4, a line operation signal is sent from the receiver A to the shutter control panel B to completely close the shutter at once.

As shown in Fig. 5, in such a smoke-proof shutter, even when smoke generated by a fire spreads while creeping to the ceiling surface A and has not yet reached the floor surface B, the smoke detector S is activated and the smoke-proof shutter is activated. D is completely closed from the ceiling surface A to the floor surface B at once. Therefore, since the entire shutter is closed in the early stages of a fire, there is a risk that evacuation will be delayed.

In view of these problems, the smoke-proof shutter according to the present invention is equipped with a smoke detector at the opening/closing end of the shutter body, and the shutter is controlled via a switch element based on the operation signal of the smoke detector. The purpose is to gradually lower and close the opening/closing end of the shutter body according to its height from the floor.

That is, in the present invention, a smoke detector with a fast response speed installed at the opening/closing end of the shutter body is connected to a switch element section that is turned on and off by an operation signal from the smoke detector, and the switch element section This invention relates to a smoke-proof shutter, characterized in that an electric opening/closing part that opens and closes by is provided in the drive circuit of the shutter body, and the shutter body is lowered when the electric opening/closing part is closed.

The smoke-proof shutter according to the present invention will be specifically explained below with reference to the drawings.

FIG. 1 shows a first example of a smoke-proof shutter according to the present invention.
This is an example. In the figure, 1 is a bellows-shaped shutter body that is driven by a motor M along the rails 3, 3 on both side edges.The opening/closing end 2 of the shutter body 1 is equipped with a transmitted light type shutter with a fast response speed. A smoke detector 4 is installed. Reference numeral 5 denotes a switch element section 5 that performs a shutter control operation in response to an operation signal from the smoke detector 4, and is electrically connected to the smoke detector 4, and an electric switch section 6 that is opened and closed by the switch element section 5. It is installed in a drive circuit 8 that connects the power supply 7 and the shutter main body drive motor M. Reference numeral 9 denotes a receiver relay that opens and closes the electric switch 10 in the drive circuit 8 in response to an operation signal from a smoke detector (not shown) installed at another location.

Next, the operating state of the smoke-proof shutter shown in this first embodiment will be explained.

When a fire occurs and the smoke detector 4 detects the smoke and sends an operating signal to the switch element section 5, the switch element section 5 closes the electrical switch section 6 and detects smoke installed elsewhere. The drive circuit 8 is configured by operating the receiver relay 9 in response to the operation signal from the sensor 4 and closing the electrical switching section 10 . Therefore, the operating signal of the switch element section 5 and the receiver relay 9
The electric switching parts 6 and 10 form an OR circuit with the operation signal, and the motor M is rotationally driven by the power supply 7.
After the shutter body 1 descends a little, if the amount of smoke at that height decreases, the shutter body 1 stops descending, and if the amount of smoke at that height increases, it descends again. Therefore, the shutter body 1 gradually moves downward and closes.

In other words, the smoke detector 4 installed at the opening/closing end 2 of the shutter body 1 detects the amount of smoke at the height of the opening/closing end 2 of the shutter body 1 from the floor. Then, the closing operation is gradually performed.

FIG. 2 shows the second smoke-proof shutter according to the present invention.
This is an example of the following.

A transmitted light type smoke detector 4 with a fast response speed is installed at the opening/closing end 2 of the bellows-shaped shutter body 1 which is driven by a motor M, and a switch element part 5 is activated by the operation signal of the smoke detector 4. It is similar to the embodiment in FIG. 1 in that it is operated and the electrical switching section 6 of the drive circuit 8 is opened and closed by the operation.

However, an electromagnetic magnet 11 is installed at both ends of the opening/closing end 2 of the shutter body 1, and the coil of the electromagnetic magnet 11 is connected to the drive circuit 8.
It is inserted inside. A stopper 12 that is attracted and detached faces the electromagnet 11, and a tension spring 13 is installed between the stopper 12 and the inside of the track body 3, and a fulcrum 14
The shutter body 1 is rotatably supported by the shutter body 1, and a pulley 15 attached to a protrusion formed on the stopper 12 engages with a plurality of recessed steps 16 formed inside the rail body 3. It has become freely possible.

The operating state of this second embodiment will be explained.

The operating signal from the smoke detector 4 is transferred to the switch element section 5.
When the signal is sent to , the electrical switching section 6 is closed, and the electrical switching section 10 is closed by the operation of the receiver relay 9 which receives the operation signal from the smoke detector installed at another location.

Since the drive circuit 8 is configured by the closing of the electric switching parts 6 and 10, the electromagnetic magnet 11 is excited by the power source 7, and the stopper 12 is attracted against the force of the tension spring 13. The pulley 15 of the protruding part of the stopper 12, which had been in the engaged state until now, disengages from the recessed step 16 of the rail body 3, and the shutter body 1 descends due to its own weight and stops at a certain height. be.

That is, as in the case of the first embodiment, depending on the amount of smoke in the room, the shutter body 1 is lowered and closed while occupying a position at the height from the floor of the opening/closing end of the shutter body 1.

The smoke-proof shutter according to the present invention connects a switch element part that is turned on and off in response to an operation signal from the smoke detector to a smoke detector with a fast response speed installed at the opening/closing end of the shutter body, Since the electric switching section that opens and closes using the switch element section is provided in the drive circuit of the shutter body,
Even if a fire occurs, the shutter body can be lowered and closed while occupying a height corresponding to the amount of smoke, so the effect is that the descent of the shutter body can be controlled in an analog manner according to the amount of smoke.

[Brief explanation of the drawing]

The drawings show an embodiment of the smoke-proof shutter according to the present invention, and FIG. 1 is a perspective view showing the principle of the first embodiment, FIG. 2 is a front view showing the principle of the second embodiment, and FIG. 3 is a perspective view showing the principle of the second embodiment. Fig. 4 is a block diagram of a conventional automatic fire alarm system, and Fig. 5 is a sectional view of a room equipped with a smoke-proof shutter. 1 is the shutter body, 2 is the opening/closing end of the shutter body, 3 is the rail body, 4 is the smoke detector, 5 is the switch element part, 6 and 10 are the electrical switching parts of the drive circuit 8, 9
is the receiver relay, and 7 is the power supply.

Claims (1)

[Claims] 1. A switch element that turns on and off according to the operation signal from the smoke detector is connected to a fast-response smoke detector installed at the opening/closing end of the shutter body, and electricity is turned on and off by the switch element. A smoke-proof shutter characterized in that an opening/closing part is provided in a drive circuit of the shutter main body, and the shutter main body is lowered when the electric opening/closing part is closed.