JPH04173687A - Entrance door of elevator - Google Patents

Abstract

PURPOSE:To operate an elevator even in case of a fire by melting the shaft of an unlocking device whose central part is formed of a metal of a low melting point lower than the material of both sides, at the central part, when a fire breaks out, so as to cut off the transmission of heat from the entrance side to the elevator shaft side. CONSTITUTION:The central part 20a of the shaft 20 of an unlocking device 9 pivoted to an outer tube 9a is formed of an aluminum material, while both sides expect the central part 20a, that is, the part 20c furnishing an engaging piece 20b at the entrance side, and the part 20d furnishing an operating piece 9d at the elevator shaft side are formed of a steel material. When a fire breaks out at the entrance side of the elevator, the engaging piece 20b of the shaft 20 of the unlocking device 9 is exposed in a high temperature heat, and when its temperature reaches the melting point of the aluminum, the central part 20a is melted and removed, and the transmission of the heat from the entrance side to the elevator shaft side is cut off, and thereby the temperature rise of the rear side plate 2c of a door 2 is stopped. Since a damage or a burning of the apparatuses of the cage can be prevented when a fire breaks out at the entrance side, in such a way, the elevator can be operated even in case of a fire.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevator landing door, and more particularly to an elevator landing door with an improved fireproof structure.

[Prior Art] Figures 5 to 10 are shown in, for example, Japanese Utility Model Publication No. 1-17578. This shows a conventional elevator landing door. In Figure 9, (1) is the elevator landing doorway, (2) is the landing door that opens and closes the doorway (1), and there is a frame (2a) facing the landing side. The top plate (2b) and the back plate facing the hoistway side (
2C) are fixed facing each other across a space. (2d) is the hanger + of the door (2), (3) is the hanger case fixed to the upper edge of the doorway (1) and supported the hanger (2d), (4) is the back plate of the door (2) ( 2C) is a fixed roller pivotally attached to the door (2C), (5) is a movable roller that is placed on the back plate (2b) of the door (2) facing the fixed roller (4), and (6) is the back side of the door (2). An arm pivotally supported by a plate (2C) and having a movable roller (5) pivotally supported on one side.

(7) is a locking device, and (7a) has a hanger in the middle (2d
) is the hook bar of the locking device, (7b) is the hook bar (7a
), (7c) is a link connecting the other end of hook bar (7a) and arm (6), (7d) is fixed to hanger case (3) and faces hook (7b). (8) When the car (not shown) faces the landing,
A drive plate (9) is an unlocking device provided on the door (2), and (9) is provided on the car door (not shown) and is disposed between the fixed roller (4) and the movable roller (5). (9a) is an outer cylinder that is fixed to the front plate (2b) of the landing door (2) and is a part of the front plate (2b).

(9b) is a steel shaft made of a round bar and pivotally supported by the outer cylinder (9a); (9c) is a C that engages with the shaft (9b) and prevents the shaft (9b) from moving in the axial direction. The ring (9dl) is an operating piece fixed to the hoistway side end of the shaft (9b) with a nut (9e) and is arranged so as to be engageable with the arm (6).

(9f) is an engagement piece formed at the end of the shaft (9b) on the landing side, and (9g) is a keyhole. (10) is a box spanner-like key with a shape corresponding to the engagement piece (9f) at one end.

An engagement hole (LOA) is provided that loosely fits into the engagement piece (9f).

Next, the operation of a conventional elevator landing door will be explained.

First, when the door (2) of landing 9 is fully closed, the hook (7b) engages with the engaging element (7d) as shown in Fig. 8, and the door (2) is closed.
Door (2) is locked, making it impossible to open the door (2) manually from the elevator landing side. Next, when the car stops at the landing and the car door begins to open, the movable roller (5) is pressed and displaced by the drive plate (8), and the eighth The hook bar (7a) shown in the figure rotates clockwise, the key (7b) comes off the engagement piece (7d), and the locking device (7) is unlocked. The door (2) is then opened in conjunction with the drive plate (8).

After this, the door (2) is closed by an operation opposite to that described above,
At the fully closed position, the hook (7b) rides on and engages the engaging member (7d), thereby locking the two doors (2).

On the other hand, it is necessary to open the door (2) from the landing side to inspect the inside of the elevator hoistway.
), the key (
By fitting and rotating the engagement hole (10a) of 10), the arm (6) is interlocked through the displacement of the first actuating piece (9d), and the one-lock device (7) is unlocked.

[Problems to be solved by the invention] The landing doors of such conventional elevators have a framework of nine doors (two
A top plate (2b) and a back plate (2c) are fixed to the top plate (2b) and the back plate (2c) so as to face each other with a space in between, and the shaft (9b) of the unlocking device (9) is fixed to the top plate (2b) and the back plate (2c). ).

Therefore, even if a fire occurs on the landing side, the high heat caused by the fire (for example, high heat of 1000℃ to 1500℃) will be removed from the door (2).
The air layer (2) between the front plate (2b) and the back plate (2c) of
e) is blocked.

However, at the location where the unlocking device (9) is provided.

The high heat caused by the fire is transmitted from the landing side to the hoistway side through the shaft (9b) of the unlocking device (9), raising the temperature of the back plate (2C) of the first door (2). When the car faces the back plate (2C) of the door (2), which has become hot, the equipment and wiring installed in the car are damaged or burnt out by the radiant heat from the back plate (2C).

When a fire broke out on the 9th platform side, elevator operations were immediately stopped to prevent cars from passing through the floor where the fire occurred.

Therefore, when a fire breaks out, there is a problem in that people inside the building cannot be evacuated from the building using the elevator.

This invention was made in order to solve this problem. Even if a fire occurs on the first landing side, the temperature rise of the back plate of the door is suppressed, so that the elevator can continue to operate even in the event of a fire. The purpose is to provide a landing door.

[Means to solve the problem] An elevator landing door according to this invention.

A door that opens and closes an entrance/exit of an elevator hall, which has a front plate and a back plate that are arranged facing each other and separated from each other.

A locking device installed on the back plate side of the door to lock the door.

It has a shaft that penetrates the back plate and is movably supported on the door, and the center portion is made of a material with a lower melting point than both ends.

An unlocking device is provided which unlocks the locking device by moving a shaft through a lockhole in the top plate.

Further, the unlocking device for an elevator landing door according to the present invention has a locking mechanism movably pivoted on a nine front plate, one end of which is disposed on the landing side, and the other end of which is extended between the front plate and the back plate. 1 shaft, and a second shaft penetrating the back plate and movably pivoted on the back plate, with one end facing the hoistway and the other end facing the other end of the first shaft with a space between them. The lock device is unlocked by engaging the first shaft and the second shaft by moving the first shaft from the landing side.

[Effect] The elevator landing door is configured like this.

The locking device is unlocked by movably operating the shaft of the unlocking device, whose center portion is made of a material with a lower melting point than both end portions, through the lock hole in the top plate.

Further, the first shaft of the unlocking device is movably operated from the hall side to engage the first shaft and the second shaft to unlock the locking device.

[Embodiment] Blood 51 Figure 1 is a cross-sectional view showing an embodiment of the present invention, and shows the same part as in Figure 7 of the conventional device.
) have different axis structures.

Note that the same or corresponding parts as in FIGS. 5 to 10 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, (201 is the shaft of the unlocking device (9) pivotally supported by the outer cylinder (9a), the center part (20a) is made of aluminum material (melting point, about 660°C); Excluding both ends, that is, the part having the engagement piece (20b) on the landing side (
20c) and the hoistway side actuating piece (9d) [2
0dl is made of steel (melting point, approximately 1530°C). That is, the central portion (20a) is made of a material with a lower melting point than both end portions. In addition, as a matter of course, the axis (20)
has the necessary strength.

Next, the operation of this embodiment will be explained.

If a fire breaks out on the landing side of the elevator, the unlocking device (9
) is exposed to high heat. Then, when the temperature of the shaft (20) rises and reaches 660°C, which is the melting point of the aluminum material, the central part (20a) melts and falls off, and the shaft (20) has an engagement piece (20b) on the landing side. It is separated into a portion (20c) and a portion (20d) to which the hoistway side operating piece (9d) is fixed. As a result, the transfer of heat from the landing side to the hoistway side by the shaft (20) of the unlocking device (9) is blocked, so the temperature rise of the back plate (2c) of the nine doors (2) is suppressed.

Therefore, the elevator landing door according to the first embodiment can prevent car equipment from being damaged or burnt out when a fire occurs on the 9th landing side, so that the elevator can be operated even in the event of a fire.

In addition, in this embodiment, the outer shape of the shaft (20) of the unlocking device (9) can be made the same as that of the conventional product, so most of the components of the conventional device can be used for the unlocking device (9). There is also the effect that it can be done.

Figures 2 to 4 show a second embodiment of the present invention, which differs from the conventional example in the structure of the shaft of the unlocking device (9).

In the figure, (21) is the first shaft of the unlocking device (9), one end is placed on the landing side and the other end is placed between the front plate (2b) and the back plate (2C). The outer cylinder (
22) so as to be rotatably and axially movable. Then, the end face of the flange part (
21a) and the inner bottom surface (22a) of the outer cylinder (22).

A compression spring (23) is inserted and the first shaft (21)
is held in the predetermined position shown in FIG. 2 by this compression spring (23) and C-ring (21b). Further, at one end of the first shaft (21), that is, at the end on the landing side
0) is provided, and furthermore, the first
The other end of the shaft (21) has an engagement hole (21d) shown in FIG.
is the provision. (25) is the second shaft of the unlocking device (9), one end of which is placed on the hoistway side, and the other end of which is located on the first shaft (21).
Opposite the other end, pass through the back plate (2C) of one unit and insert the back plate (2C).
c) is rotatably supported. (25c) is.

This is a C ring that restricts movement of the second shaft (25) in the axial direction. Further, an actuating piece (9d) is fixed to one end of the second shaft (25), that is, the end on the hoistway side, with a nut (9e), and is engaged with the other end of the second shaft (25). A goko (25a) is provided. The engaging element (25a) has the shape shown in FIG. 4, and faces the engaging hole (21d) of the first shaft (21) with a gap A shown in FIG. . Then, the first axis (21) is connected to the second axis (25).
When pressed in the direction of , the engagement hole (21
d), the engaging element (25a) of the second shaft (25) is arranged to loosely fit therein.

In this embodiment, when unlocking the single lock device (7), first insert the engaging hole (LOA) of the key (IO) into the first lock device (9).
the engagement piece (21c) of the shaft (21). Next, when the key (lO) is pressed and rotated in the direction of the second shaft (25), the compression spring (23) is compressed and the first shaft (21) moves in the direction of the hoistway. The engagement hole (21) of the shaft (21) of
d) and the engager (25a) of the second shaft (25) are loosely fitted, and the rotational force of the first shaft (21) is transmitted to the second shaft (25).

The rotation of the second shaft (25) causes the first actuating piece (9d
) is displaced and the two-lock device (7) is unlocked.

However, except when performing the above-mentioned unlocking operation, the unlocking device (
9) A space, that is, a gap A shown in FIG. 2, is maintained between the engagement hole (21d) of the first shaft (21) and the engagement element (25a) of the second shaft (25). There is. Therefore, when a fire occurs on the 1st landing side, the high heat caused by the fire will not be transmitted from the 9th landing side to the hoistway side via the first shaft (21)J and the second shaft (25).

The temperature rise of the back plate (2c) of the door (2) is suppressed.

Therefore, in this embodiment as well, the elevator can be operated in the same manner as in the first embodiment.

[Effects of the Invention] As explained above, the elevator landing door according to the present invention has a front plate and a back plate that are spaced apart from each other and are arranged opposite to each other, and is a door that opens and closes the entrance and exit of the elevator landing.

A locking device installed on the back plate side of the door to lock the door.

It has a shaft that penetrates the back plate and is movably supported on the door, and the center portion is made of a material with a lower melting point than both ends.

It has an unlocking device that unlocks the locking device by moving the shaft from the lock hole in the top plate.

When a fire broke out, the shaft of the unlocking device melted in the middle, resulting in 9
Transfer of heat from the landing side to the hoistway side can be blocked.

Also, the elevator landing door according to the present invention.

A first shaft movably supported on the top plate, with one end disposed on the landing side and the other end extending between the top plate and the back plate.

and a second shaft penetrating the back plate and movably pivoted on the back plate, with one end facing the hoistway and the other end facing the other end of the first shaft with a space therebetween; It has an unlocking device that engages the first shaft and the second shaft and unlocks the locking device by movable operation of the shaft from the landing side, and when a fire occurs, the first shaft and the second shaft are The space provided between the shafts 2 and 2 can block the transfer of heat from the hall 9 side to the hoistway side.

Therefore, in the event of a fire on the 9th landing side, the transfer of heat from the 9th landing side to the hoistway side can be cut off, thereby suppressing the temperature rise of the back plate of the 1st door, and preventing damage or burnout of car equipment. This has the effect of allowing the elevator to operate even in the event of a fire.

[Brief explanation of drawings]

FIG. 1 is a partial vertical sectional view showing a first embodiment of an elevator landing door according to the present invention, and FIG.
Figure 3 is a diagram corresponding to Figure 1 showing an example of the embodiment of Figure 2.
4 is a sectional view taken along the TV-rV arrow in FIG. 2,
Fig. 5 is a front view of the elevator landing, Fig. 6 is an enlarged view of the section ■ in Fig. 5, Fig. 7 is a sectional view taken along the -■ arrow in Fig. 6 showing the conventional elevator landing door, and Fig. 8 is a front view of the elevator landing. 9 is a diagram conceptually showing the back side of the elevator hall, FIG. 9 is a front view of the key of the unlocking device, and FIG. 10 is a view taken along the X arrow in FIG. 9. In the figure. (2) ---Door, (2b) ---Top plate, (2c
)... Back plate, (7) - Locking device, (9)... Unlocking device, (9g)... Keyhole, (9b) (20) -
...Axis, (20a)...Central part, (21)...
First axis, (25)...Second axis Note that the same reference numerals in each figure indicate the same or equivalent parts. Fig. 1 2p 9b20 Axis 20a: '? Smell @ψ 21寥1o Eclipse 2522n# Fig. 2 Fig. 3 Fig. 4 Fig. 51!1 Fig. 6 1■ Fig. 711 Fig. 8 Fig. 9

Claims (2)

[Claims] (1) A door that has a front plate and a back plate arranged facing each other at a distance from each other and opens and closes the entrance/exit of an elevator hall, a locking device provided on the back plate side of the door to lock the door, and the back side of the door. It has a shaft that penetrates the plate and is movably pivoted on the door, the central part of which is made of a material with a lower melting point than both ends, and the locking device is operated by moving the shaft through the lock hole of the top plate. An elevator landing door characterized by being equipped with an unlocking device for unlocking. (2) A door that has a front plate and a back plate arranged facing each other at a distance from each other and opens and closes the entrance/exit of an elevator landing, and a locking device provided on the back plate side of the door to lock the door; a first shaft movably pivoted on the plate, having one end disposed on the landing side and the other end extending between the front plate and the back plate; a second shaft movably pivoted on the shaft, with one end facing the hoistway and the other end facing the other end of the first shaft with a space therebetween, the second shaft facing the landing of the first shaft; An elevator landing door comprising: an unlocking device that engages the first shaft and the second shaft and unlocks the locking device by a movable operation from .