JPH04336080A - Safety device for fire door - Google Patents

Abstract

PURPOSE:To prevent the opening of an all-time closed type fire door for a long time. CONSTITUTION:A safety device for a fire door is equipped with an opening detecting means 2 for detecting the opening of an all-time closed type fire door 1 and an information means 3 which is operated when the detection of opening continues for several hours.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a normally closed fire door.

0002

[Prior Art] For a permanently closed fire door, it is necessary to open it only when passing by and keep it closed at all times in order to reliably perform its intended function of preventing smoke from flowing out and spreading fires. It has become. However, currently, due to the inconvenience of traffic and the use of nearby areas as a place to store luggage, people are forced to insert wedges between the floor and store their luggage.
They are often left open for long periods of time, sometimes all day long. Conventionally, no countermeasures have been taken against such long-term opening.

0003

SUMMARY OF THE INVENTION It is an object of the present invention to provide a safety measure which helps to prevent a permanently closed fire door from being opened for an extended period of time.

0004

[Means for Solving the Problems] The characteristic configuration of the safety device for a normally closed fire door according to the present invention includes an open detecting means for detecting the opening of a normally closed fire door, and an open detecting means for detecting the opening of a normally closed fire door that continues for a set time. The point is that a notification means that is activated when the vehicle is activated is provided.

[0005]

[Operation] If a normally closed fire door remains open for a set time, the open detection means will detect this and the alarm will be activated. By selecting a set time that is sufficient to determine whether or not the vehicle is being opened due to traffic, the alarm means will not activate unnecessarily when the vehicle is opened due to traffic, thereby preventing the vehicle from being opened unreasonably. The notification means can only be activated when the

[0006]

[Effects of the Invention] As a result, when the door is not opened due to traffic, that is, when it is left open for an unreasonable length of time, the notification means is activated to notify this and close the always-closed fire door. I am now able to call out what is needed.

[0007]

[Example] As shown in Fig. 2, the safety device notifies the fire door 1 when the normally closed fire door 1 (hereinafter simply referred to as the fire door) is continuously opened for a set time.
As shown in FIG. 1, this device includes an open detection means 2 for detecting the opening of the fire door 1, and an alarm that is activated when the open detection of the open detection means 2 continues for a set time. It consists of means 3. The opening detecting means 2 is configured by attaching a magnet 2A to the free end side of the upper part of the fire door 1 away from the swing fulcrum R via a bracket 4 in such a manner that it projects in the opening direction. When the fire door 1 is closed and the magnet 2A is close to the magnet 2A, it is turned off, and when the fire door 1 is open, the magnet 2A is located away from the magnet 2A. A magnetic sensor 2B that is turned on when the magnetic sensor 2B is turned on is installed, and a sensor circuit 2C that outputs an open signal a when the magnetic sensor 2B is turned on is provided.

As shown in FIG. 4, the notification means 3 includes a timer circuit 3A that starts counting every time the open signal a from the sensor circuit 2C is input, and is reset when the input stops, and a speaker. 3B, and a voice synthesis circuit 3C that outputs a ringing signal to the speaker 3B in accordance with the output from the timer circuit 3A. The timer circuit 3A outputs the voice message signal b1 after counting the first set time T1 until counting the second set time T2.
After measuring the set time T2, the buzzer signal b2 is output. The voice synthesis circuit 3C outputs a message voice drive signal in response to an input of a voice message signal b1, and outputs a continuous buzzer sound signal in response to an input of a buzzer signal b2.

Reference numeral 5 indicates a power supply circuit to which AC 100V is supplied, and reference numeral 6 indicates a power supply circuit that supplies the sensor circuit 2C and the timer circuit 3 in place of the power supply circuit 5 when the power supply to the power supply circuit 5 is cut off.
A is an auxiliary power supply that supplies power to the speech synthesis circuit 3C. Then, a sensor circuit 2C, a timer circuit 3A, a voice synthesis circuit 3
C. The power supply circuit 5 is configured as one circuit unit 7, and as shown in FIG. 3, this circuit unit 7 and
The magnetic sensor 2B is housed in one box 8 with a door 8A. 9 is a power switch, 10 is a knob for changing (setting) the first set time T1 of the timer circuit 3A, and 11 is an LED (
12 is a warning light using an LED (red) that lights up in response to the open signal a, and 13 is an external contact for taking out the output of the timer circuit 3A to the outside of the monitoring room, etc. be. Note that the door 8A has a lock 14 that can be opened and closed with a key. In other words, if you do not open the lock 14 with the key,
The door 8A is opened and the power switch 9 is turned off to prevent operation. Examples of actual values of the first set time T1 and the second set time T2 are 15 seconds to 3 minutes and 1 to 3 minutes.
It's 5 minutes.

The operation will be briefly explained based on FIG. [1] When the fire door 1 is opened, the magnetic sensor 2B is turned on and an open signal a is output. [2] Then, with that fire door 1 open,
When the set time T1 has elapsed, the voice message signal b1
is output and a voice message is output. [3] When the second set time T2 elapses with the fire door 1 remaining open from the start of output of the voice message, the buzzer signal b2 is output and a buzzer sound is output. [4] When the fire door 1 is closed after the buzzer sound is output, the magnetic switch 2B is turned off and the timer circuit 3A is reset. After the above [1], if the fire door 1 is closed before the first set time T1 has elapsed, the magnetic sensor 2B is turned off, the timer circuit 3A is reset, and [2] and [3] are performed. When the fire door 1 is closed in [2],
Similarly, the magnetic sensor 2B is turned off, the timer circuit 3A is reset, and [3] is not performed. According to the above embodiment, the magnetic sensor 2B is turned on when the fire door 1 is opened, so even if the magnet 2A is removed, the magnetic sensor 2B is turned on in the same way and a voice message or buzzer sounds. will be output, which will tell you this.

[Another Example] ■ In the above example,
As shown by the two-dot chain line in the figure, an external power switch 15 that is turned off, such as a push-button switch that is turned off when pressed, is provided near the fire door 1. In this case, while the external power switch 15 is turned off, no notification is given even if the fire door 1 is opened, and it is desirable or required to keep the fire door 1 open for a long time, such as when loading or unloading cargo. Moreover, since the external power switch 15 is turned on when the operation is released, there is no need to forget the operation to return to the original state. ■ In the above embodiment, the magnetic sensor 2B is used as the opening detection means 2, but the opening detection means 2 is one that detects the opening of the fire door 1 using a limit switch, an infrared sensor, or an ultrasonic sensor. It may be. ■ In the above embodiment, the notification means 3 is one that provides notification in two stages using a voice message and a buzzer sound.
The notification means 3 may be one that notifies the user only with a voice message or only with a buzzer sound when the set time has elapsed. Of course, the notification may be made using light instead of sound, or may be made using both sound and light. (2) In the above embodiment, an emergency power source is used as the power source. In this case, since emergency lighting and evacuation exit guide lights are generally provided near the fire door 1, a power source can be easily secured. (2) In the above embodiment, the power switch 9 is a push-button type switch that is energized. In this case, it is possible to prevent the power switch 9 from remaining off due to forgetting or erroneous operation. ■ In the above embodiment, the device is installed in an exposed state, but the device may be installed in a wall-embedded type or a ceiling-embedded type, or it can be installed in a device such as an evacuation exit guide light. Also good.

[0012]Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Block diagram

[Figure 2] Perspective view

[Figure 3] Front view of main parts

[Figure 4] Time chart

[Explanation of symbols]

1. Always-closed fire door 2 Open detection means 3 Notification means

Claims (1)

[Claims] Claim 1: A fire prevention device comprising an open detection means (2) for detecting the opening of a normally closed fire door (1), and an alarm means (3) that operates when the open detection continues for a set time. Door safety device.