JPS6366085A - Smoke device for elevator - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a device for preventing smoke from entering through an elevator hall entrance.

[Conventional technology]

The landing door opens and closes the elevator landing entrance.

It is well known that jin are generally equipped with sliding doors.

In order to open and close this landing door, a gap is required between the entrance frame and the landing door. Therefore, if a fire breaks out in the building, smoke may enter the hoistway through the gap and flow out to other floors.

In order to prevent such disasters, some buildings are required to prevent smoke from flowing out from the first landing entrance through the hoistway to other floors. However, the above-mentioned elevator landing door cannot meet the above-mentioned smoke prevention requirements, and a smoke prevention shutter as shown in FIG. 1 is provided.

Figure 7 is a cross-sectional view of a building showing a conventional elevator smoke prevention system. In Figure 9, (1) is the hoistway, (2) is the hoistway (
Elevator car located inside, (3) is the elevator landing, (4) is the landing entrance leading from the landing (3) to the hoistway (1), (5) is installed at the entrance/exit (4) The landing entrance/exit frame, (6) is a landing door placed with a gap in the landing entrance/exit frame (5) and opens and closes the entrance/exit (4), (7) is a pillar erected around the landing (3), (8) ) is a smoke-proof 7-layer that goes up and down along the pillar (7) and surrounds the landing (3).

Conventional smoke prevention equipment for elevators is constructed as described above, and when necessary, the smoke prevention device (8) is lowered to shield the landing (3) and prevent smoke from entering the hoistway (11).
This prevents water from leaking from the l.

[Problem that the invention seeks to solve]

In the conventional elevator smoke prevention system as described above, the second boarding area is surrounded by a smoke prevention shutter (8), which increases the cost and requires changes to the building structure to install the smoke prevention shutter (8). There are also problems such as restrictions, which impede the use of the second boarding space, and spoil the aesthetics.

This invention was made to solve the above problems, and eliminates the need for a smoke-proof shutter that was conventionally installed separately.
To provide a smoke prevention device for an elevator which can have a smoke prevention function with a simple configuration.

Another object of the present invention is to provide a smoke prevention device for an elevator that can improve the reliability of the smoke prevention function in addition to the above object.

[Means for solving problems]

In the smoke prevention device for an elevator according to the present invention, a driver made of a shape memory alloy is fixed to one of the first landing doorway frame and the first landing door, a shielding plate is attached to this driver, and the tip of the driver is attached to the first landing doorway frame and the first landing door. The shield plate is placed on the other side of the landing door with a gap maintained, and when necessary, the drive element is heated to a predetermined temperature with a heating element to transform the drive element into its memorized shape, and the shield plate is tightly attached to the other side of the landing doorway frame and the landing door. It was designed to let you do so.

Moreover, in the elevator smoke prevention device according to another aspect of the present invention, when the shielding plate is operated, the shielding plate is held at the above-mentioned operating position by a holding device.

[Effect]

In this invention, when the driver fixed to one of the landing entrance/exit frame and the landing door is heated to a predetermined temperature, the driver is deformed into a memorized shape, and accordingly, the shielding plate is fixed to the other of the landing entrance/exit frame and the landing door. Closely closes the gap between the landing entrance frame and the landing door.

In another aspect of the present invention, when the driver is deformed into a memorized shape and comes into close contact with one side of the shield plate, the hall entrance/exit frame, or the landing door, the shield plate is maintained at the operating position even if the driver returns. be done.

〔Example〕

Figures 1 to 6 are diagrams showing one embodiment of the present invention.
The figure is a cross-sectional view of the landing entrance, Figure 2 is a vertical cross-sectional view, Figure 3 is an enlarged view of the part ■ in Figure 1, and Figure 4 is ff-f of Figure 3.
5 is a longitudinal sectional view of the holding device portion of FIG. 4, and FIG. 6 is a circuit diagram.

(1), (3) to (6) are similar to the conventional device described above.

In Figures 1 to 5, (6) is a landing door, the upper end of which is suspended via rollers aυ from the door rail α1 fixed to the landing doorway frame (5), and the lower end of which is suspended from the floor of the landing doorway (4). It is guided to the threshold α■ which is installed and forms part of the landing entrance/exit frame (5). (13 is a driver whose one end is fixed to the side of the landing door (6), and is made of a shape memory alloy that remembers a predetermined shape at a predetermined temperature.The α core is made of rubber, synthetic resin, thin metal plate, or a shielding plate 1 formed of a flexible plate made of a composite material thereof, whose rear end is attached to the other end of the drive element (13), and whose tip is arranged so as to maintain a gap G at all times with respect to the hall entrance/exit frame (5). At the time, a heating element αe, which is provided in the driver element 0 and heats the driver element Q3 to the predetermined temperature when energized,
αη is a similar drive element and shielding plate (the heating element is not shown) provided on the upper surface of the landing door (6), QI, (11 is a similar driver element and shielding plate provided on the lower surface of the landing door (6), It is a shielding plate (the heating element is not shown), and the other end of the shielding plate α wound faces the surface of the sill α. A shaped frame, Qυ is a tube fixed to the frame member, and @ is housed in the cylindrical shape υ so as to be freely movable in the axial direction, and its tip protrudes and constitutes a holding device that engages with the side edge of the shielding plate I. The pawl (C) is a push spring that is housed in the tube Qυ and presses the pawl ■ in the above-mentioned projecting direction, and 34 is an electromagnet that is fixed to the frame (to) and attracts the pawl (2) when it is energized. Similarly, for the upper and lower shielding plates q7) and α] of (6),
, electromagnets (goods), etc. are installed.

In Figure 6, (+) and (-) are DC power supplies, (C) is a fire detector that closes when a fire occurs, and (E) is a reset switch.

In the elevator smoke prevention device constructed as described above, the tips of the shielding plates α1-η and aI are always as follows.

In both cases, a gap is maintained with respect to the landing entrance/exit frame (5) (including the first threshold), so there is no problem in opening and closing the first landing door (6).

When a fire occurs and the fire detector (c) closes, the heating element a9 is energized and the driver element (13) is heated.
When the temperature of No. 3 reaches a predetermined temperature, the drive element α deforms into a memorized shape, and the shielding plate No. 0 moves to the position (14 people), and its tip comes into close contact with the hall entrance/exit frame (5). At the same time, the side edge of the shielding plate I engages with the tip of the claw @.

Reverse movement is prevented. The gap between the side of the hall entrance/exit frame (5) and the hall door (6) is now closed by the shielding plate α, and this state is maintained. After that, even if the driver unit returns to its normal temperature shape, the shield plate 0 is blocked by the pawl Q2, and is elastically deformed to remain in close contact with the hall entrance/exit frame (5). Therefore, even if there is a difference in the amount of deformation of the drive element (13), this is absorbed and the shielding plate α is reliably brought into close contact with the hall entrance/exit frame (5). Child US
Even if the circuit is broken.

Smoke prevention function is maintained.

To reset shielding plate a4, press the reset switch (
When E) is closed, the electromagnet (goods) is energized, the claw @ is attracted against the force of the pressing spring (c), and the connection between the tip of the claw 4 and the shielding plate α is released. . As a result, the shielding plate I returns to its normal state of elastic deformation and returns to its initial position. When the reset switch (to) is released, the pawl @ protrudes again under the force of the push spring, and comes into contact with the side edge of the shielding plate I and stops. This will return everything to its initial state and allow it to operate again.

In addition, the shielding plates aη on the upper and lower surfaces of the second landing door (6).

The operation of α9 is exactly the same.

In the embodiment, the heating element a9 is linked to the fire detector (c), but it is clear that a two-manual switch operation may be used.

Further, in the embodiment, the driver α3, (ls, as
, shielding plates 0, (Iη, α9, etc.) were installed on the landing door (6), but it is not possible to install these on the landing entrance frame (5) and make the tip of the shielding plate α4 come into close contact with the landing door (6). good.

Furthermore, as shown in Japanese Utility Model Application Publication No. 52-108757, the gap between the landing entrance/exit frame (5) and the landing door (6) may be closed with a usable smoke shield. It is possible. That is, the smoke prevention device shown in the above embodiment is suitable for closing gaps where structurally sufficient space cannot be obtained by other means.

〔Effect of the invention〕

As explained above, in this invention, a driver made of a shape memory alloy is fixed to one of the second landing doorway frame and the landing door,
A shielding plate is attached to this drive element, and its tip is placed on the other side of the hall entrance/exit frame and the hall door with a gap maintained, and when required gM:
By heating the J element with a heating element, the driver element is transformed into its memorized shape, and the shielding plate is brought into close contact with the other side of the hall entrance/exit frame and the landing door, so the shielding plate can be driven with a simple configuration and reliably. It has the effect of providing a smoke-proofing function and being able to be easily assembled into existing landing doors.

Further, in another aspect of the present invention, when the shielding plate operates, it is held by the holding device, so even if the control system fails, the smoke prevention function can be maintained, improving reliability. There are young fruits that can grow.

[Brief explanation of the drawing]

1 to 6 are views showing an embodiment of the elevator smoke prevention device according to the present invention, in which FIG. 1 is a cross-sectional view of the hall entrance, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a vertical sectional view. Figure 1 is an enlarged view of a part of Figure 1, Figure 4 is a view taken along the ff-■ line in Figure 3, Figure 5 is a view of Figure 4.
FIG. 6 is a circuit diagram, and FIG. 7 is a cross-sectional view of a building showing a conventional elevator smoke prevention device. In the figure, (4) is the landing entrance/exit, (5) is the landing entrance/exit frame, (
6) is the landing door, +12 is the landing entrance/exit frame (sill), (13
is the driver, α◆ is the shield plate, (1!9 is the heating element, αQ
is a drive element, αD. Note that the same reference numerals in the figure indicate the same parts.

Claims (3)

[Claims] (1) A landing doorway frame provided at the landing doorway, a landing door arranged with a gap in the landing doorway frame and opening and closing the landing doorway, and one end of which is fixed to one of the landing doorway frame and the landing door, and is fixed to a predetermined position. A drive element made of a shape memory alloy that remembers its shape at different temperatures, and a flexible element whose rear end is attached to the other end of the drive element and whose tip is arranged with a gap between the other of the landing entrance/exit frame and the landing door. and a shielding plate provided on the drive element to apply the predetermined temperature to the drive element at necessary times to transform the drive element into its memorized shape and bring the tip of the shield plate into close contact with the other of the landing entrance/exit frame and the landing door. A smoke prevention device for an elevator, comprising a heating element. (2) A landing doorway frame provided at the landing doorway, a landing door arranged with a gap between the landing doorway frame and opening and closing the landing doorway, and one end of which is fixed to one of the landing doorway frame and the landing door, and is fixed to a predetermined position. A drive element made of a shape memory alloy that remembers its shape at different temperatures, and a flexible element whose rear end is attached to the other end of the drive element and whose tip is arranged with a gap between the other of the landing entrance/exit frame and the landing door. and a shielding plate provided on the drive element to apply the predetermined temperature to the drive element at necessary times to transform the drive element into its memorized shape and bring the tip of the shield plate into close contact with the other of the landing entrance/exit frame and the landing door. A smoke prevention device for an elevator, comprising: a heating element that causes the shielding plate to move; and a holding device that holds the shielding plate in its position when the shielding plate is operated. (3) A smoke prevention device for an elevator according to claim 2, wherein the holding device has a release function of releasing the holding of the shield plate by electromagnetic force.