JP2007176641A - Fire protection/smoke-prevention shutter device for elevator and elevator device provided therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fire protection/smoke-prevention shutter device for an elevator descending a screen to a height position below a height position of the smoke by an arbitrary dimension and stop it there by controlling descending of the fire protection/smoke-prevention screen in fire. <P>SOLUTION: The fire protection/smoke-prevention shutter device for the elevator provided on an upper part of a landing doorway of the elevator and constituted so as to close the landing doorway by descending the fire protection/smoke-prevention screen 7 in generation of fire is provided with a smoke sensor provided on a lower end of the fire protection/smoke-prevention screen; and a stopping means for stopping the fire protection/smoke-prevention screen at a midway of descending. In generation of fire, the height position of the smoke filling and descending from a ceiling part of the elevator landing is detected by the smoke sensor while gradually descending the fire protection/smoke-prevention screen. After the fire protection/smoke-prevention shutter is descended to below the detected height by an arbitrary dimension, the fire protection/smoke-prevention shutter is stopped by the stopping means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an elevator fire / smoke / shutter device provided at a hall entrance / exit of an elevator and an elevator apparatus including the same.

The most scary thing at the time of a fire is smoke, and the diffused smoke gradually descends from the ceiling. A conventional fire and smoke prevention shutter device for an elevator starts to descend automatically by a signal from a fire detector installed on a ceiling portion of the elevator hall (see, for example, Patent Document 1).
In addition, if the elevator has a fire control function, for example, as shown in JEAS-A408 “Standard for Linked Control Operation with Fire Protection Equipment”, the elevator goes directly to the evacuation floor immediately after the fire detection. Stop driving.

JP 2002-306622 A

  In a conventional fire and smoke prevention shutter device for elevators, fire control is performed in the event of a fire, and the shutter (screen) completely descends to the floor of the landing, so it is not possible to evacuate using the elevator. Therefore, there is a problem that the elevator cannot be operated for evacuation even if the evacuees are left on the fire floor and can still be evacuated by the elevator, for example, in the early stage when smoke has entered the ceiling part of the landing was there.

  The present invention has been made to solve the above-described problems, and in order to make a system that can operate as an evacuation elevator in the event of a fire to the maximum extent, smoke that has fallen after being filled from the ceiling can be arbitrarily transmitted from the landing floor. If it is above the height of the elevator, the fire prevention smoke prevention shutter device for the elevator that controls the lowering of the fire prevention smoke prevention screen and lowers the screen to a height position lower than the smoke height position to an arbitrary dimension is stopped. It is to provide.

  Further, the present invention provides an elevator fire / smoke / shutter device that lifts the screen and gets into the car when the fire / smoke screen stops.

  In addition, when smoke that has fallen after being filled from the ceiling is below a certain height from the floor of the landing, the elevator switches to fire control operation, and the fire and smoke screen is lowered to the floor of the landing. A device is provided.

  The fire and smoke prevention shutter device for an elevator according to the present invention is provided at the elevator entrance and exit upper part of the elevator, and is configured so that the fire and smoke prevention screen descends and closes the entrance and exit when a fire occurs. Equipped with a smoke detector provided at the lower end and a stop means for stopping the fire and smoke screen in the middle of lowering, and in the event of a fire, gradually lowering the fire and smoke screen while lowering the ceiling of the elevator hall The smoke detector detects the height of the smoke that is filled and descends with a smoke detector, lowers the fire and smoke shutter to an arbitrary dimension below the detected height, and then stops the fire and smoke shutter with the stop means It is comprised as follows.

  In addition, the elevator apparatus according to the present invention is configured such that when the smoke height position from the landing floor is below a predetermined height, the elevator is switched to a fire-fighting control operation, and the fire-proof smoke-proof screen is connected to the landing floor. It is intended to be lowered.

  According to this invention, since the time until the elevator enters the control operation at the time of fire can be delayed as much as possible, rescue by the elevator is possible if there are refugees in the initial stage of the fire.

Embodiment 1.
1 is a side sectional view showing a fire and smoke prevention shutter device for an elevator according to Embodiment 1 of the present invention, FIG. 2 is a front view of a landing as seen from the direction of arrow A in FIG. 1, and FIG. 4 is a cross-sectional view taken along line B, FIG. 4 is a view corresponding to FIG. 1 showing a state where the fire and smoke screen is lowered, FIG. 5 is a view corresponding to FIG. 2 showing a state where the fire and smoke screen is lowered, and FIG. FIG. 7 is a plan view of the structure inside the fireproof and smokeproof screen box as viewed from above, FIG. 8 is a cross-sectional view taken along line EE in FIG. 7, and FIG. 9 is fireproof. FIG. 8 is a view corresponding to FIG. 8 showing the state when the smoke screen is lowered, FIG. 10 is a cross-sectional view taken along the line PP in FIG. 7, and FIG. 11 is a view corresponding to FIG. 10 showing the state when the fire and smoke screen is lowered. FIG. 12, FIG. 12 is a view corresponding to FIG. 8 showing the state when the fireproof smoke screen is lifted, and FIG. Figure 10 corresponds view showing a state in which smoke screen is lifted, Fig. 14 is a flowchart showing the operation of the elevator fire smoke shutter device according to the first embodiment of the present invention.

  1 to 6, 1 is an elevator car, 2 is a car door, 3 is a landing door, 4 is a vertical frame of a landing three-way frame constituting the landing entrance, 5 is a curtain plate of a landing three-way frame, Fire and smoke screen box installed on the back of the curtain 5, 7 is a fire and smoke screen, 8 is a screen weight attached to the lower end of the fire and smoke screen 7, and 9 is a smoke detector attached to the screen weight 8. 10 is a screen guide provided facing the vertical frame 4, 11 is a manual closing device, 12 is a winding shaft, 13 is a screen control box, 14 is a ceiling part of the elevator hall, and 20 is a floor surface of the elevator hall. , 21 is smoke gradually descending from the ceiling surface 14 of the hall during a fire.

Next, a schematic configuration of the fireproof and smokeproof screen box 6 will be described with reference to FIG.
The fireproof and smokeproof screen 7 is wound around a screen winding roll 31. Shafts 32 protrude from both ends of the screen take-up roll 31. Screen winding roll 31
The shaft 32 projecting from both ends of the shaft is supported by a support metal 33. A screen lowering speed control device 34, a ratchet device 40, and a rotation detection device 60 are provided directly connected to shafts 32 protruding from both ends of the screen winding roll 31. The fire-proof and smoke-proof screen 7 is equipped with a screen lowering speed adjusting device 34 so as to descend at a constant speed. Generally, since it is equipped with the fire-proof flame-proof screen 7, detailed description is abbreviate | omitted. When the fireproof and smokeproof screen 7 is lifted, it is wound around the screen winding roll 31 by the winding mechanism.
Generally, since it is equipped with the fireproof and smokeproof screen 7, detailed description is abbreviate | omitted. Also,
A ratchet mechanism 40 is provided so that the fireproof and smokeproof screen 7 does not fall down without permission.
Note that, generally, a ratchet mechanism is provided in a fire and smoke shutter in an elevator, and in the event of a fire, the ratchet is opened and the screen is lowered. Further, the ratchet can be engaged and released via a wire or the like from a manual closing device 11 installed at a landing or the like during maintenance and inspection. One of the shafts 32 protruding from the screen take-up roll 31 is equipped with a screen lowering speed adjusting device 34 (details of the mechanism are omitted). Similarly,
One of the shafts 32 is equipped with a ratchet device 40. Similarly, the shaft 32
One of them is equipped with a rotation detection device 60.

Next, a schematic configuration of the ratchet device 40 will be described with reference to FIG.
The operation and the like of the fire and smoke / shutter device of the present invention can be achieved by using the ratchet device 40 as described below. The fire and smoke screen 7 is pulled in the direction of arrow F by the screen weight 8 at the lower end of the fire and smoke screen 7, and the ratchet 41 is always applied with a rotational force in the direction of arrow G. Thus, as shown in FIG. 8, the ratchet 41 is normally engaged with the lever 42, and the fire and smoke screen 7 cannot be lowered in the arrow F direction. This state is either a state where the fireproof smoke screen 7 is not lowered at all, a state where the screen is stopped halfway, or a state where the screen is completely lowered to the landing floor 20 It is. A ratchet 41 is fitted to the shaft 32. The lever 42 engaged with the ratchet 41 is rotatable about the fixed shaft 43 as a rotation center. A connector 44 is connected by a pin 45 to the side of the lever 42 opposite to the ratchet 43 of the fixed shaft 43. The connector 44 and the electromagnetic actuator 46 are connected by a wire 47. An end portion of the electromagnetic actuator 46 is rotatably connected to a fixing bracket 49 by a pin 48. In the electromagnetic actuator 46, the rod 46a is expanded and contracted by an operating power source based on control from a control device (not shown). FIG. 8 shows a state in which the rod 46a is extended. Reference numeral 50 denotes a cable connected to the electromagnetic actuator 46. Further, the tension spring 52 is locked in the hole 51 provided in the lever 42 between the fixed shaft 43 of the lever 42 and the coupling tool 44, and the opposite side of the tension spring 52 is locked in the fixing tool 53. The lever 42 is always biased by the pulling force of the tension spring 52 so that the tip of the lever 42 is engaged with the ratchet 41.

FIG. 9 shows a case where the fire and smoke / clean screen 7 is lowered. In the event of a fire, maintenance or inspection, the lever 42 engaged with the ratchet 41 is disengaged and the fire and smoke screen 7 is lowered. Indicates the state of the hour.
When a fire occurs (see step S1 in FIG. 14), the rod 46a of the electromagnetic actuator 46 is sucked (retracted) by an operating power source from a control device (not shown). When the rod 46a of the electromagnetic actuator 46 is attracted and the connected wire 47 is pulled up in the direction of arrow H, the pin 45 side of the lever 42 is pulled up with the fixed shaft 43 as the center of rotation against the pulling force of the tension spring 52. . The lever 42 is disengaged from the ratchet 41 at the tip of the ratchet 41, and the fire and smoke screen 7 wound around the screen take-up roll 31 is lowered in the direction of arrow F by the weight of the screen weight 8 at the lower end of the screen 7. (See step S2 in FIG. 14). Note that the fire and smoke proof screen 7 has a screen lowering speed control device 34 (not shown)
As a result, the vehicle descends at a substantially constant speed. As shown in FIG. 4, the fire-proof smoke-proof screen 7 is lowered while detecting smoke 21 that is filled and descends from the ceiling portion 14 of the hall as shown in FIG. 4 by the smoke detector 9 attached to the screen weight 8 (FIG. 14). Steps S3 and S4). As shown in FIG. 4, after the smoke detector 9 is further lowered by a predetermined D dimension from the height position at which the smoke detector 9 no longer detects smoke, the fire smoke screen 7 is moved to the height position. Stop halfway (
(See steps S5 and S6 in FIG. 14). The predetermined D dimension lowering means will be described later.
As shown in FIG. 4, when it is detected that the refugee lifted the fire and smoke screen 7 by hand while the fire and smoke screen 7 is stopped halfway, the elevator car call is registered and the elevator car is It can be made to drive for evacuation toward the floor (see steps S7 and S8 in FIG. 14). Further, the fire and smoke screen 7 is lowered again, and the smoke detector 9 is further lowered by a predetermined D dimension from the height position at which the smoke detector 9 no longer senses smoke. Stop at the height position (steps S7 and S9 in FIG. 14)
reference). When the smoke height from the landing floor 20 falls below a predetermined height, the elevator is switched to fire control operation, and the fire and smoke screen 7 is completely lowered to the landing floor 20 and the elevator is lowered. It cannot be used (see step S10 in FIG. 14).

Next, a schematic configuration of the rotation detection device 60 will be described with reference to FIGS.
A cam 61 of the rotation detector 60 is fitted to the shaft 32. The engagement between the switch 62 and the cam 61 is arranged as shown in FIG. When the switch lever 62a rotates in the direction of the arrow L (forward direction), the contact L of the switch 62 is “on” when the switch L rotates in the direction of the arrow M (reverse direction). It is comprised so that it may become.
FIG. 11 shows a case where the fire prevention smoke prevention screen 7 is lowered. When the fire prevention smoke prevention screen 7 is lowered, the cam 61 rotates in the arrow G direction, and the convex portion 61a of the cam 61 is the switch lever 62a of the switch 62. Is shown in a state where it is kicked up and rotated in the direction of the arrow L. When the switch lever 62a rotates in the direction of the arrow L, the switch contact L is “ON”. Here, in the event of a fire, the smoke-proof screen 7 descends and the smoke sensor 9 attached to the screen weight 8 senses the smoke that has fallen down from the ceiling 14, but the smoke sensor 9 senses the smoke. If it stops, it will be judged that the height position of the smoke which filled and descended from the ceiling part 14 will be to the position where "the smoke detector 9 stops detecting smoke". For example, when the switch lever 62a by the convex portion 61a of the cam 61 rotates six times in the direction of the arrow L from the position where the smoke detector 9 no longer detects smoke, that is, the switch contact L is turned “ON” six times. (When the screen take-up roll 31 is rotated approximately once), the rod 46a of the electromagnetic actuator 46 is pushed out and the lever 42 is engaged with the ratchet 41 as shown in FIG. The rotation is prevented and the descending of the fire and smoke screen 7 is stopped halfway. And this is a stop means for stopping the fireproof and smokeproof clean 7 in the middle of descending.

Next, a case where there is a user who evacuates from the floor by an elevator during a fire will be described.
The user who intends to evacuate by the elevator lifts the weight part of the fireproof and smokeproof screen 7 stopped on the way upward (see step S7 in FIG. 14). When the fireproof and smokeproof screen 7 is lifted, the winding mechanism (generally, since it is equipped with the screen, a detailed description thereof is omitted. For example, a cord winding mechanism of a vacuum cleaner), the screen It is wound around a winding roll 31. At this time, the ratchet 41 rotates in the arrow K direction as shown in FIG. The lever 42 rotates in the direction of arrow J against the tension of the tension spring 52 and escapes. At this time, even if the rod 46a of the electromagnetic actuator 46 is pushed out, the wire 47 is flexible and can be "relieved" by bending as shown in FIG. The rotation detection device 60 at this time is in a state as shown in FIG. That is, the cam 61 rotates in the direction of the arrow K by lifting the fireproof and smokeproof screen 7. Convex part 61a of cam 61
Kicks up the switch lever 62a and rotates it in the direction of arrow M (reverse direction). When the switch lever 62a rotates in the direction of arrow M, the contact M of the switch is “ON”. Therefore, when the contact point M of the switch 62 is “ON”, it is determined that the user lifts the fire and smoke screen 7 and evacuates by the elevator, registers the elevator car call, and moves the car to the floor. (See step S8 in FIG. 14). After the user gets into the car and the elevator door is closed, the fireproof and smokeproof screen 7 stops again at a certain height according to the smoke height (see steps S5 and S6 in FIG. 14). When smoke further falls, fire prevention smoke prevention screen 7
Stops after a predetermined D dimension is lowered from a height position where smoke is not sensed. The above-described screen descending is repeated until the smoke height from the landing floor 20 reaches a predetermined position (for example, a height of 1 m from the landing floor 20) (see step S9 in FIG. 14). And if the height position of the smoke which fills and descends from the ceiling part 14 of the hall becomes a height of, for example, 1 m or less from the hall floor 20, the elevator switches to the fire control operation, and the fire and smoke screen 7 is lowered to the landing floor 20 to make evacuation by an elevator impossible (see step S10 in FIG. 14).
As a method of the above control, for example, FIG. 1 from the normal state where the fireproof smoke screen 7 is not lowered to when it is lowered to an arbitrary height position (when the C dimension in FIG. 4 is 1 m, for example).
If the switch lever 62a is kicked 30 times in the direction of arrow L by the convex portion 61a of the cam 61 shown in FIG. 1 (that is, if the contact L of the switch 62 is "ON" 30 times), the ceiling of the hall The height position of the smoke that fills and descends from the section 14 is the landing floor 20.
Therefore, the elevator switches to fire control operation, lowers the fire and smoke screen 7 to the landing floor 20 and makes it impossible to evacuate by the elevator.
For example, when the user lifts the fire and smoke screen 7 (eg, there is a user trying to evacuate by an elevator), the operation state of the fire and smoke shutter can be confirmed on the elevator monitoring panel. Constitute. Of course, the fire and smoke screen 7 is not stopped, and the same operation is performed if the fire and smoke screen 7 is lifted even when the fire and smoke screen 7 is being lowered.

Embodiment 2.
In the first embodiment, the smoke detector 9 is attached to the screen weight 8 at the lower end of the fireproof and smokeproof screen 7, but a heat detector may be attached separately from this, or a heat detector may be used instead of the smoke detector 9. A sensor may be attached. Thereby, not only the detection of the smoke height position, but instead of the detection of the smoke height position, it is possible to determine whether the elevator can be operated by detecting the temperature of the elevator hall.

Embodiment 3.
In the event of a fire, if the user approaches the elevator hall when the fire and smoke screen 7 is stopped on the way, for example, an announcement may be made such as “If you lift the screen, the elevator will come”. This makes it possible for the user to recognize that the elevator car will be registered when the screen is lifted, so that the user can easily escape from the landing by the elevator.

Embodiment 4.
In the event of a fire, if the fire and smoke screen 7 is lowered and then lifted manually, the elevator will not only automatically generate a landing call, but will also send a signal to the elevator monitoring panel indicating that there are refugees It can also be transmitted. This makes it possible for the user to recognize that the elevator car will be registered when the screen is lifted, so that the user can easily escape from the landing by the elevator.

BRIEF DESCRIPTION OF THE DRAWINGS It is a sectional side view which shows the fire-proof smoke-proof shutter apparatus for elevators in Embodiment 1 of this invention. FIG. 2 is a front view of a hall viewed from the direction of arrow A in FIG. 1. It is sectional drawing along the BB line of FIG. FIG. 2 is a view corresponding to FIG. 1 showing a state in which a fireproof and smokeproof screen is lowered. FIG. 3 is a view corresponding to FIG. 2 showing a state in which a fireproof and smokeproof screen is lowered. It is a perspective view which shows the principal part structure of a fire prevention smoke-proof screen apparatus. It is the top view which looked at the structure in a fire prevention smoke prevention screen box from upper direction. It is sectional drawing along the EE line of FIG. FIG. 9 is a view corresponding to FIG. 8 illustrating a state when the fireproof and smokeproof screen is lowered. It is sectional drawing along the PP line of FIG. FIG. 11 is a view corresponding to FIG. 10 showing a state when the fireproof smokeproof screen is lowered. FIG. 9 is a view corresponding to FIG. 8 showing a state when the fireproof smoke screen is lifted. FIG. 11 is a view corresponding to FIG. 10 showing a state when the fireproof and smokeproof screen is lifted. It is a flowchart which shows operation | movement of the fire prevention smoke-proof shutter apparatus for elevators in Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Car door 3 Platform door 4 Vertical frame of the landing three-sided frame 5 Board screen of the three-way frame 6 Fire prevention smoke prevention screen box 7 Fire prevention smoke prevention screen 8 Screen weight 9 Smoke detector 10 Screen guide 11 Manual closing device 12 Winding shaft 13 Screen control box
14 Platform Ceiling 20 Platform Floor 21 Smoke 31 Screen Winding Roll 32 Shaft 33 Support Metal 34 Screen Lowering Control Device 40 Ratchet Device 41 Ratchet 42 Lever 43 Fixed Shaft 44 Connector 45, 48 Pin 46 Electromagnetic Actuator 46a Rod 47 Wire 49, 53 Fixing bracket 50 Cable 51 Hole 52 Tension spring 60 Rotation detection device 61 Cam 62 Switch 62a Switch lever

Claims (9)

In the fire and smoke prevention shutter device for elevators, which is provided at the upper part of the elevator entrance and exit of the elevator and is configured such that the fire and smoke screen is lowered to close the entrance and exit in the event of a fire,
A smoke detector provided at the lower end of the fire and smoke screen;
Stop means for stopping the fire and smoke screen in the middle of lowering,
In the event of a fire, while gradually lowering the fire and smoke screen, the smoke detector detects the height of smoke that fills and descends from the ceiling of the elevator hall, and has an arbitrary dimension from the detected height. An elevator fire / smoke / shutter device, wherein the fire / smoke / shutter shutter is stopped by the stop means after the fire / smoke / shutter shutter is lowered.   The stop means includes a rotation detection device, and when the rotation detection device detects that the fire and smoke screen has been lowered by a predetermined dimension from a position where the smoke detector stops detecting smoke, the fire and smoke screen is detected. 2. The fire prevention and smoke prevention shutter device for an elevator according to claim 1, wherein the descent of the elevator is stopped.   3. The elevator car call of the elevator is registered when the fire and smoke screen stopped during the descent is lifted, and the car is driven toward the landing floor. The fire-proof smoke-proof shutter device for elevators as described.   When the fire and smoke screen stopped during the descent is lifted, it detects the reverse rotation of the rotation detection device of the stopping means, registers the elevator car call, and drives the car toward the landing floor The elevator fire and smoke / shutter device according to claim 2, wherein:   5. The fire and smoke prevention shutter device for an elevator according to any one of claims 1 to 4, wherein the smoke detector is mounted on a screen weight at a lower end portion of the fire and smoke prevention screen.   6. The fire-proof smoke-proof shutter device for an elevator according to claim 5, wherein in addition to the smoke sensor, a heat sensor is provided on the screen weight at the lower end of the fire-proof smoke-proof screen.   The fire prevention smoke control apparatus for elevators in any one of Claims 1-6 WHEREIN: When the height position of the smoke from a landing floor surface becomes lower than predetermined | prescribed height, an elevator is a fire control operation. The elevator apparatus is characterized in that the fire and smoke screen is lowered to the landing floor.   In the fire-proof smoke-proof shutter device for elevators in any one of Claims 1-6, when a fire-proof smoke-proof screen stops in the middle of a descent and a user approaches an elevator hall, screen lifting operation is carried out. An elevator apparatus characterized by making a prompt announcement.   In the fire-proof smoke-proof shutter device for elevators in any one of Claims 1-6, when the fire-proof smoke-proof screen stopped in the middle of the descent is lifted, there is an evacuee in the monitoring board of an elevator. An elevator apparatus characterized by transmitting a signal for transmission.

Images