JP2005239401A - Fire extinguishing device for elevator pit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire extinguishing device for an elevator pin in which early fire extinguishing in the elevator pit can be securely achieved. <P>SOLUTION: A fire extinguishing plate 10 is disposed to a first evacuation position along one side wall in the elevator pit 1, and a first actuation position to cover a floor surface 1a. A second fire extinguishing plate 13 is disposed to take a first evacuation position along the other side wall in the elevator pit 1, and a second actuation position to cover the first fire extinguishing plate 10 at the first actuation position. The first fire extinguishing plate 10 is held at the first evacuation position by a first lock mechanism 16A, and the second fire extinguishing plate 13 is held at the second evacuation position by a second lock mechanism 16B. Interlocked with actuation of a smoke detector 22 or a heat detector 23, holding by the first lock mechanism 16A is released, the first fire extinguishing plate 10 falls to cover the floor surface 1a, holding by the second lock mechanism 16B is released, and the second fire extinguishing plate 13 falls to cover the first fire extinguishing plate 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator pit fire extinguishing apparatus.

  A conventional elevator pit fire extinguisher is a fire extinguisher equipped with a container containing a fire extinguisher, a fire detector attached to the container and operating according to temperature, and an ejection nozzle attached to the container to eject the fire extinguishing agent The device is mounted on the lower part of the elevator car. And when the fire detector attached to the lower part of the car senses heat, the fire extinguishing agent in the container is ejected from the ejection nozzle to extinguish the fire in the pit. (For example, refer to Patent Document 1.)

JP-A-11-236174

  The conventional elevator pit fire extinguishing system is configured in this way, so when the car is located on the upper floor away from the pit, the fire detector senses the heat from the fire in the pit. I can't. Therefore, there is a problem that a person who notices a fire in the pit needs to lower the car to the lowest floor and cannot sufficiently cope with the initial fire extinguishing of the fire in the pit.

  The present invention has been made to solve such a problem, and a fire detector is installed in a pit and operates to cover the pit floor in conjunction with the operation of the fire detector. It is an object of the present invention to provide a fire extinguishing device for an elevator pit that can be installed in a pitch and reliably perform initial fire extinguishing of fire in a pit with a simple configuration.

  An elevator pit fire extinguishing apparatus according to the present invention includes a fire detector for detecting a fire in a pit, a first retraction position along a side wall in the pit, and a first operation position covering the floor of the pit. A first fire extinguishing plate attached to the pit so that a lower end thereof is rotatable about a first horizontal axis, a first lock mechanism for holding the first fire extinguishing plate in the first retracted position, A drive circuit that releases the holding of the first fire extinguishing plate by the first lock mechanism in conjunction with the fire detection operation of the fire detector.

  According to the present invention, it is possible to realize an elevator pit fire extinguishing apparatus that can reliably perform initial fire extinguishing of fire in a pit with a simple configuration.

1 is a perspective view showing the inside of a pit of an elevator to which a pit fire extinguishing apparatus according to an embodiment of the present invention is attached, and FIG. 2 is a side view showing an operating state of the pit fire extinguishing apparatus when FIG. 1 is viewed from the A direction. 3 is a partially broken side view for explaining the structure of the lock mechanism in the pit fire extinguishing apparatus according to the embodiment of the present invention, and FIG. 4 is a circuit diagram of the pit fire extinguishing apparatus according to the embodiment of the present invention. .

1 and 2, the first buffer mount 2 is attached to the floor 1a of the pit 1 at the center in the depth direction of the pit 1 of the hoistway so as to be orthogonal to the depth direction. The car buffer 3 is attached to the first buffer mounting base 2 so as to be positioned at the center of the pit 1. The second buffer mount 4 is attached to the floor 1a of the pit 1 on the rear side in the depth direction of the pit 1 of the hoistway so as to be orthogonal to the depth direction. A counterweight buffer 5 is attached to the second buffer mount 4.
A pair of car guide rails 6 are extended in the vertical direction so as to face each other in the depth direction center position of both wall surfaces of the hoistway in the direction orthogonal to the depth direction. Further, although not shown, a counterweight guide rail extends vertically on the rear wall surface in the depth direction of the hoistway. A car (not shown) is guided by the car guide rail 6 and is disposed in the hoistway so as to be movable up and down. Further, a counterweight (not shown) is guided in the counterweight guide rail and is disposed in the hoistway so as to be movable up and down. When the car and the counterweight drop abnormally, the cars 3 and 5 collide with the buffer, and the shock received by the car and the counterweight is buffered.

The first fire extinguishing plate 10 is made of a steel plate or a non-combustible material in a flat plate shape, and a plurality of holes 10a are formed. The first fixed frame 11 is attached to the floor surface 1a of the pit 1 along the one wall surface of the hoistway in the direction orthogonal to the depth direction, with the longitudinal direction being the depth direction. And the 1st fire extinguishing board 10 is attached to the 1st fixed frame 11 so that rotation around the axis | shaft (1st horizontal axis | shaft) which makes one end a depth direction with the hinge 12 is carried out, The 1st along the one wall surface of a hoistway is carried out. 1 retraction position and the 1st operation position which covers the floor 1a of pit 1 are constituted. Here, two first fire extinguishing plates 10 are installed in the depth direction with the car guide rail 6 interposed therebetween. During operation, the first fire extinguishing board 10 avoids the car guide rail 1 and the buffer mounts 5 and 6, It covers the entire area of the floor surface 1a.
The second first fire extinguishing plate 13 is made of an iron plate or a non-combustible material in a flat plate shape, and a plurality of holes 13a are formed. The second fixed frame 14 is attached to the floor surface 1a of the pit 1 along the other wall surface of the hoistway in the direction orthogonal to the depth direction, with the longitudinal direction being the depth direction. And the 2nd fire extinguishing board 13 is attached to the 2nd fixed frame 14 so that rotation around the axis | shaft (2nd horizontal axis) which makes one end a depth direction with the hinge 12, and the 2nd fire extinguishing path along the other wall surface of a hoistway is carried out. 2, and a second operating position that covers the first fire extinguishing plate 10 at the first operating position. Here, two second fire extinguishing plates 13 are installed in the depth direction with the car guide rail 6 interposed therebetween, and during operation, the first fire-extinguishing plate 13 avoids the car guide rail 1 and the buffer mounting bases 5 and 6 and performs the first operation. The first fire extinguishing plate 10 in the position is covered with almost the entire area.

  Here, when the first fire extinguishing plate 10 is located at the first operating position, the height of the first fixed frame 11 is set so that the first fire extinguishing plate 10 substantially contacts the floor surface 1a. Further, when the second fire extinguishing plate 13 is located at the second operation position, the height of the second fixed frame 14 is set so that the second fire extinguishing plate 13 substantially contacts the first fire extinguishing plate 10 at the first operation position. Is set.

As shown in FIG. 3, the first lock mechanism 16 </ b> A includes a receiving portion 17 attached to one wall surface of the hoistway so as to be located near the other end of the first fire extinguishing plate 10 in the first retraction position, and a depth. A rod 18 attached to the receiving portion 17 so as to be stretchable in a direction orthogonal to the direction, a spring 19 that biases the rod 18 in a direction in which the rod 18 extends, and a spring 18 attached to the receiving portion 17 so as to be able to extend in the vertical direction. A plunger 20 that engages with the other end of the first fire extinguishing plate 10 and holds the first fire extinguishing plate 10 in the first retracted position, and is operated so as to reduce the extension amount (extension amount) of the plunger 20. And a suction type solenoid 21 for releasing the locking of the first 20 fire extinguishing plates 10.
Similarly, the second lock mechanism 16B has a receiving portion 17 attached to the other wall surface of the hoistway so as to be positioned in the vicinity of the other end of the second fire extinguishing plate 13 in the second retracted position, and a direction orthogonal to the depth direction. A rod 18 attached to the receiving portion 17 in a telescopic manner, a spring 19 for urging the rod 18 in an extending direction, and a second fire extinguishing plate 13 which is attached to the receiving portion 17 in an up-and-down direction and is extended. The plunger 20 is engaged with the other end of the plunger 20 to hold the second fire extinguishing plate 13 in the second retracted position, and the plunger 20 is actuated to reduce the extension amount of the plunger 20 to engage the second fire extinguishing plate 13 of the plunger 20. And a suction type solenoid 21 for releasing the stop.
A smoke detector 22 as a fire detector is installed close to the upper part of the pit 1 and away from the hoistway side wall. A heat sensor 23 as a fire sensor is installed on the first buffer mount 2.
In addition, the rod 18 and the spring 19 urge the first and second fire extinguishing plates 10 and 13 in the first and second retracted positions in directions to rotate the first and second operating positions. It constitutes a biasing means. The suction type solenoid 21 is driven by a driving circuit shown in FIG.

Next, the operation of the pit fire extinguishing apparatus configured as described above will be described based on the drive circuit shown in FIG. In FIG. 4, the solenoid SO1 corresponds to the solenoid 21 of the first lock mechanism 16A, and the solenoid SO2 corresponds to the solenoid 21 of the second lock mechanism 16B. The switches SW1 and SW2 are changeover switches that operate the solenoids SO1 and SO2 independently.
First, the switches SW1 and SW2 are switched to operate the solenoids SO1 and SO2. Thereby, the extension amount of the plunger 20 of the first and second lock mechanisms 16A, 16B is reduced. Therefore, the first and second fire extinguishing plates 10 and 13 are rotated around the hinge 12 to stand up. Then, while pushing the rod 18 so that the spring 19 is contracted by the first and second fire extinguishing plates 10 and 13, the switches SW1 and SW2 are switched to stop the operation of the solenoids SO1 and SO2, and the plunger 20 is extended. Thereafter, when pressing of the first and second fire extinguishing plates 10 and 13 is stopped, the rod 18 is extended by the urging force of the spring 19, and the first and second fire extinguishing plates 10 and 13 are locked to the plunger 20. Thereby, the 1st and 2nd fire-extinguishing board 10 and 13 are prevented from rotating to the 1st and 2nd operation position side, and are set to the 1st and 2nd retreat positions, respectively.

Here, for example, it is assumed that the cigarette 9 is thrown into the pit 1 and burned into the dust collected on the floor surface 1a of the pit 1. When the smoke sensor 22 detects smoke or the heat sensor 23 detects heat, the transistor Tr1 is turned on and the solenoid SO1 is activated. Thereby, the extension amount of the plunger 20 of the first lock mechanism 16A is reduced, and the locking of the first fire extinguishing plate 10 by the plunger 20 is released. Therefore, the rod 18 is extended by the urging force of the spring 19, the first fire extinguishing plate 10 rotates around the hinge, and the first extinguishing plate 10 falls to the first operating position that covers the floor surface 1 a of the pit 1. Thereby, the 1st fire extinguishing board 10 covers the cigarette 9 and the burning dust, suppresses replenishment of air, lowers temperature, and is extinguished.
When the transistor Tr1 is turned on, the transistor Tr2 is turned from on to off, and the terminal voltage of the capacitor C increases. After a set time (for example, several seconds), when the terminal voltage of the capacitor C rises to the operating voltage of the Zener diode DZ, the transistor Tr3 is turned on and the solenoid SO2 is activated. Thereby, the extension amount of the plunger 20 of the second lock mechanism 16B is reduced, and the locking of the second fire extinguishing plate 13 by the plunger 20 is released. Therefore, the rod 18 is extended by the urging force of the spring 19, the second fire extinguishing plate 13 rotates around the hinge, and the second fire extinguishing plate 13 falls down to the second operating position that covers the first extinguishing plate 10. Thereby, the 2nd fire extinguishing board 13 covers the 1st fire extinguishing board 10, suppresses replenishment of air, and it extinguishes on the 1st fire extinguishing board 10, and what is burning is extinguished.

In this way, in this pit fire extinguishing apparatus, the first fire extinguishing plate 10 covers the floor surface 1a from the first retracted position in the standing state in conjunction with the operation of the smoke sensor 22 or the heat sensor 23. Since it is comprised so that it may fall to 1 operation position, the 1st fire extinguishing board 10 falls on the object which is burning on the floor surface 1a, the replenishment of the air to the burning object is suppressed, and it extinguishes. Therefore, the fire on the floor surface 1a can be initially extinguished with a simple configuration without using a fire extinguisher or water.
Further, since the second fire extinguishing plate 13 is configured to fall on the first fire extinguishing plate 10 after a predetermined time from the falling of the first extinguishing plate 10 to the floor surface 1a, the second fire extinguishing plate 13 is configured. As a result of the falling of the air, the first fire extinguishing plate 10 can suppress the replenishment of air to the burning object without being extinguished, and the initial fire extinguishing of the fire on the floor surface 1a can be surely performed.
Further, since the plurality of holes 10a and 13a are formed in the first and second fire extinguishing plates 10 and 13, when the first and second fire extinguishing plates 10 and 13 are collapsed, an object burning by wind pressure is removed. Blowing is suppressed.
Further, since the hole 13a is formed in the second fire extinguishing plate 13 so that the second fire extinguishing plate 13 covers the first fire extinguishing plate 10 so as not to overlap the hole 10a, the second fire extinguishing plate 13 is covered. Further, replenishment of air to the object burning in the hole 10a of the first fire extinguishing plate 10 is suppressed.

In addition, a spring 19 that urges the first and second fire extinguishing plates 10 and 13 in the direction of falling to the first and second operating positions via the rod 18 is disposed in the first and second lock mechanisms 16A and 16B. Therefore, when the locking of the first and second fire extinguishing plates 10 and 13 by the plunger 10 is released, the first and second fire extinguishing plates 10 and 13 are reliably rotated to the first and second operating position sides. be able to.
In addition, since the smoke detector 22 is located close to the upper part of the pit 1 and away from the side wall of the hoistway where the airflow is slow, smoke generated by the fire in the pit 1 can be detected quickly. Effective in terms of initial fire extinguishing.
Further, since the smoke detector 22 and the heat detector 23 are used to detect the fire in the pitch 1, the fire in the pit 1 can be detected quickly, and the initial fire extinguishing point It is effective.

In the above embodiment, the first and second fire extinguishing plates 10 and 13 are described. However, the second fire extinguishing plate 13 is omitted and only the first extinguishing plate 10 is provided. Also good.
Moreover, in the said embodiment, the 1st and 2nd fixing frames 11 and 14 which rotatably support the lower end of the 1st and 2nd fire extinguishing board 10 and 13 via the hinge 12 are attached to the floor surface 1a. The first and second fixed frames 11 and 14 may be attached to the lower end of the wall surface of the pit 1.
Moreover, in the said embodiment, although the 1st and 2nd fire extinguishing boards 10 and 13 shall be arrange | positioned along the wall surface which the pit 1 opposes, the 1st and 2nd fire extinguishing boards 10 and 13 are pits. 1 may be disposed along the same wall surface, or may be disposed along adjacent wall surfaces orthogonal to each other of the pits 1.
In the above embodiment, the first and second fire extinguishing plates 10 and 13 are described as being disposed two by two, but the number of the first and second fire extinguishing plates 10 and 13 is two. It is not limited to this, and may be set as appropriate in consideration of the arrangement of obstacles such as buffers on the floor surface 1a.

In the above embodiment, two fire detectors, smoke detector 22 and heat detector 23, are installed. However, it is not always necessary to install two fire detectors. You may make it install.
In the above embodiment, the smoke sensor and the heat sensor are used as the fire sensor. However, the fire sensor is not limited to the smoke sensor and the heat sensor. For example, the CO sensor, A luminance sensor or the like may be used.

It is a perspective view which shows the inside of the pit of the elevator with which the fire extinguishing apparatus for pits concerning embodiment of this invention was attached. It is a side view which shows the operating state of the fire extinguishing apparatus for pits which looked at FIG. 1 from the A direction. It is a partially broken side view explaining the structure of the lock mechanism in the fire extinguishing apparatus for pits concerning embodiment of this invention. It is a circuit diagram in the fire extinguishing apparatus for pits concerning embodiment of this invention.

Explanation of symbols

  1 pit, 1a floor surface, 10 first fire extinguishing plate, 10a hole, 12 hinge, 13 second fire extinguishing plate, 13a hole, 16A first locking mechanism, 16B second locking mechanism, 18 rod (biasing means), 19 spring (Biasing means), 20 plunger, 21 suction solenoid, 22 heat detector (fire detector).

Claims (6)

A fire detector that detects fire in the pit;
A lower end is attached to the pit so as to be rotatable about a first horizontal axis so as to take a first retracted position along the side wall in the pit and a first operating position covering the floor of the pit. A first fire extinguisher;
A first lock mechanism for holding the first fire extinguishing plate in the first retracted position;
An elevator pit fire extinguishing apparatus, comprising: a drive circuit that releases the holding of the first fire extinguishing plate by the first lock mechanism in conjunction with a fire sensing operation of the fire sensor.   The first lock mechanism includes a biasing unit that biases the first fire extinguishing plate held in the first retraction position to rotate around the first horizontal axis toward the first operating position. The elevator pit fire extinguishing apparatus according to claim 1.   3. The elevator pit fire extinguishing apparatus according to claim 1, wherein a plurality of holes are formed in the first fire extinguishing board. The lower end is pivotable about a second horizontal axis so as to take a second retracted position along the side wall in the pit and a second operating position covering the first fire extinguishing plate in the first operating position. A second fire plate attached to the pit;
A second locking mechanism for holding the second fire extinguishing plate in the second retracted position,
In conjunction with the fire detection operation of the fire detector, the drive circuit releases the holding of the first fire extinguishing plate by the first lock mechanism, and then the second lock mechanism by the second lock mechanism after a predetermined time has elapsed. The elevator pit fire extinguishing apparatus according to claim 1, wherein the fire extinguishing board is released from holding. The first locking mechanism is a first urging unit that urges the first fire extinguishing plate held in the first retraction position to rotate around the first horizontal axis toward the first operating position. With
The second locking mechanism is a second urging unit that urges the second fire extinguishing plate held at the second retracted position to rotate around the second horizontal axis toward the second operating position. The elevator pit fire extinguishing apparatus according to claim 4, comprising:   A plurality of holes are formed in the first and second fire extinguishing plates so as not to overlap each other when the first and second fire extinguishing plates are in the first and second operating positions. The elevator pit fire extinguishing apparatus according to claim 4 or 5.

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