CN102910517B - Double deck elevator and control method thereof - Google Patents

Abstract

The present invention provides a double deck elevator, comprising: a car external frame (1) traveling in a vertical direction; a plurality of elevator cars (4,5) mounted in the car external frame, with adjustable interval between each other; relative movement restraining portion (9 to 12) restraining the rise of the elevator car with respect to the car external frame; and a control portion (16) enabling the relative movement restraining portion (9 to 12) to restrain the rise of the elevator car with respect to the car external frame when the car external frame is stopped in emergence in the rise period, preventing the up-going of the elevator car when the double deck elevator with a floor height automatic correction mechanism is in emergency stop.

Description

Double-deck elevator and control method thereof

technical field

The invention relates to a double-deck elevator with two elevator cars installed in a car outer frame and the two elevator cars go up and down together, especially relates to the control technology when the double-deck elevator has an abnormal action.

Background technique

A double-deck elevator, which is a kind of elevator, has two elevator cars, an upper car and a lower car, mounted on one outer frame of the car, and the two elevator cars run together with the outer frame of the car. Improve the transport capacity of the elevator.

In the original double-deck elevators, the space between the upper and lower cars was fixed. However, when this structure is adopted, there is a limitation that the intervals between the respective floors must be set to be the same. Therefore, thereafter, a double-deck elevator having an automatic floor height correction mechanism capable of adjusting the distance between the upper car and the lower car has been developed. The automatic floor height correction mechanism is a mechanism that can automatically adjust the distance between the upper car and the lower car. With this automatic floor height correction mechanism, it is possible to use the double car even in buildings with different distances between floors. elevator.

Examples of the floor height automatic correction mechanism include pantograph type and suspension type automatic floor height correction mechanisms.

In the floor height automatic correction mechanism of the telescopic frame system, for example, a telescopic frame is provided between the upper car and the lower car, and the distance between the upper car and the lower car is adjusted by extending and contracting the telescopic frame.

On the other hand, in the floor height automatic correction mechanism of the sling system, the upper car and the lower car are suspended in the outer frame of the car by the sling, and the upper car and the lower car are adjusted by winding the sling. Space between cars.

In the above-mentioned double-deck elevator with the automatic floor height correction mechanism, as countermeasures against abnormal operations, in addition to the countermeasures for abnormal operations required by ordinary elevators that have only one elevator car running alone, it is necessary to take measures against abnormal operations in terms of control , but also need to take double-deck elevator-specific countermeasures.

Technologies related to countermeasures when a double-deck elevator has an abnormality are listed below.

Patent Document 1 discloses a technology capable of rescuing passengers when a double-deck elevator breaks down so that the passengers are not locked in the upper car or the lower car. In the double-deck elevator disclosed in Patent Document 1, when a serious failure is detected, the upper car and the lower car are made to stop urgently, and then the elevator is driven at a low speed to the point where passengers in one elevator car can be rescued. Nearest floor, after the passenger in the elevator car of one side is rescued, make elevator travel to the floor that can rescue the passenger in the other side's elevator car with low speed to rescue the passenger in the other side's elevator car.

Patent Document 2 discloses a technique for temporarily continuing the operation of an elevator even when a floor height automatic correction mechanism fails. In the double-deck elevator disclosed in Patent Document 2, when the floor height automatic correction mechanism fails to work normally, the interval between the upper car and the lower car is fixed, and the interval between the upper car and the lower car cannot be adjusted. When the lower and lower floors are stopped at the same time, the upper car and the lower car are made to stop one by one.

prior art literature

patent documents

Patent Document 1 Japanese Patent Laid-Open No. 7-41267

Patent Document 2 Japanese Patent Laid-Open No. 2001-287874

Patent Document 1 and Patent Document 2 each disclose countermeasures that should be considered in advance as a double-deck elevator specially used when an abnormality occurs. However, in addition to the above-mentioned aspects, there are other phenomena in double-deck elevators that require special countermeasures to be considered in advance.

As one of these phenomena, in a double-deck elevator with an automatic floor height correction mechanism, when the elevator stops suddenly due to an abnormality in the elevator, the elevator car may jump up inside the outer frame of the car due to inertia. moving phenomenon.

Especially in the double-deck elevator adopting the floor height automatic correction mechanism of the sling method, due to its structure, its ability to restrain the elevator car from moving upwards is weaker than that of the double-deck elevator adopting the floor height automatic correction mechanism of the telescopic frame method. , so when upward movement has taken place in the double-deck elevator of the floor height automatic correction mechanism of the sling mode, the impact produced will be greater than that of the double-deck elevator of the floor height automatic correction mechanism of the telescopic frame mode.

Contents of the invention

The object of the present invention is to provide a technology capable of preventing the elevator from moving upwards when the double-deck elevator with the floor height automatic correction mechanism stops in an emergency.

A double-deck elevator according to one aspect of the present invention has: a car outer frame traveling in an up and down direction; a plurality of elevator cars installed in the car outer frame with intervals between It can be adjusted; a relative movement restraining part that restrains the elevator car from rising relative to the car outer frame; and a control part that when the car outer frame makes an emergency stop during ascent, the The control section causes the relative movement suppressing section to suppress the elevator car from rising relative to the car outer frame.

In addition, the double-deck elevator may be arranged so that the control unit, when it is estimated that the car outer frame will rise to a predetermined abnormal position where the emergency stop occurs, will raise the outer frame of the car to the predetermined abnormal position. Before the abnormal position is reached, the relative movement suppressing portion is caused to suppress the elevator car from rising relative to the car outer frame.

In addition, the double-deck elevator may be further provided with a car outer frame position detection section for detecting the position of the car outer frame and a car outer frame for detecting the moving speed of the car outer frame a speed detection section, the control section based on the position of the car outer frame detected by the car outer frame position detection section and the car outer frame detected by the car outer frame speed detection section The moving speed of the car predicts whether the outer frame of the car will rise to the abnormal position.

In addition, the double-deck elevator may be further provided with: a processing start position arrival detection part for detecting whether the car outer frame has risen to the near side of the abnormal position A processing start position that is a predetermined distance away from the abnormal position, and when the processing start position arrival detection portion detects that the car outer frame has risen to the processing start position, the control portion starts a process for suppressing the abnormal position. The process of raising the elevator car relative to the outer frame of the car.

In addition, the process start position may also be such that the control section can suppress the lift of the elevator car relative to the car outer frame before the car outer frame reaches the abnormal position. The location at which to start the processing.

In addition, the double-deck elevator may be provided such that the car outer frame has guide rails extending in the vertical direction and fixed to the car outer frame, and the relative movement restraining portion has a stop mechanism attached to the car outer frame. on the elevator car and in contact with the guide rails according to instructions from the control section.

In addition, the double-deck elevator may also be configured such that the stop mechanism clamps the guide rail according to an instruction from the control section.

Invention effect

According to the present invention, when a double-deck elevator with an automatic floor height correction mechanism stops in an emergency, the elevator car can be prevented from moving upwards.

Description of drawings

Fig. 1 is an overall configuration diagram of a double-deck elevator according to the present embodiment.

Fig. 2 is a flowchart showing the operation of the double-deck elevator in this embodiment.

Fig. 3 is a graph of a speed pattern of an emergency braking operation in the upward direction.

Symbol Description

1 car outer frame

2 Control panel for the outer frame of the car

3 Hoist for the outer frame of the car

4 upper car

5 lower car

6 Control panel for floor height automatic correction mechanism

7 Hoist for floor height automatic correction mechanism

8 Sling for floor height correction

9～12 Upward direction emergency braking device

13 counterweight

14 buffer

15 End floor car position detection switch

16 Control panel for emergency braking device in upward direction

17, 18 guide rail

Detailed ways

Embodiments of the present invention will be described below.

Fig. 1 is an overall configuration diagram of a double-deck elevator according to the present embodiment. The double-deck elevator according to the present embodiment has an automatic floor height correction mechanism of a cable system.

The double-deck elevator of this embodiment has a car outer frame 1, a control panel 2 for the car outer frame, a hoist 3 for the car outer frame, an upper car 4, a lower car 5, and a control panel 6 for an automatic floor height correction mechanism. , Hoist for automatic floor height correction mechanism 7, sling for floor height correction 8, emergency braking device for upward direction 9-12, counterweight 13, buffer 14, end floor car position detection switch 15, emergency braking device for upward direction The control panel 16 and the guide rails 17 and 18 are used for the moving device. The control panel 2 for the car outer frame and the control panel 16 for the emergency braking device in the upward direction are arranged in the machine room, and the control panel 6 for the automatic floor height correction mechanism is arranged on the car outer frame 1 . An upper car 4 and a lower car 5 serving as elevator cars are installed in the car outer frame 1 .

The car outer frame 1 and the balance weight 13 are connected at the two ends of the same sling. The weight of the counterweight 13 is a weight that is balanced with the car outer frame 1 when a predetermined weight equivalent to the total weight of a predetermined number of passengers is carried in the upper car 4 and the lower car 5 . The hoist 3 for the car outer frame drives the sling to move the car outer frame 1 upward or downward. The car outer frame control panel 2 sends an operation command signal to the car outer frame hoist 3 to drive the car outer frame 1 to a predetermined position.

When the car outer frame 1 is abnormal during the upward running process, so that the car outer frame 1 moves upward at an abnormal speed or travels to an abnormal position in the upward direction, the car outer frame uses the control panel 2 to make the car outer frame 1 move upward. Frame 1 slows down or stops. When the car outer frame 1 cannot be decelerated in time or the deceleration function or the stop function cannot work normally, the car outer frame 1 travels upwards to the abnormal position, and at the same time, the counterweight 13 descends to the abnormal position. At this time, the balance weight 13 collides with the shock absorber 14, and the shock absorber 14 absorbs the balance weight 13 while alleviating the impact force. At this time, the car outer frame 1 performs emergency braking (emergency stop).

The upper car 4 and the lower car 5 are suspended in the car outer frame 1 by the sling 8 for floor height correction. 4 and the interval between the lower car 5 changes. The control panel 6 for the automatic floor height correction mechanism and the control panel 2 for the outer frame of the car cooperate to send an operation command signal to the hoist 7 for the automatic floor height correction mechanism to adjust the distance between the upper car 4 and the lower car 5 , so that at the stop position of the car outer frame 1, the floor heights of the upper car 4 and the lower car 5 are respectively consistent with the floor heights of the floors they stop at.

The guide rails 17, 18 extending in the up and down direction are fixed in the outer frame 1 of the car. The guide rails 17, 18 are used to fix the upper car 4 and the lower car 5 to the car outer frame 1 during an emergency stop. The guide rails 17, 18 can be set as special guide rails for emergency stop, or can be set to have the function of restricting the movement of the upper car 4 and the lower car 5 in the car outer frame 1 only in the up-down direction.

The upper car 4 is provided with upward direction emergency braking devices 9 , 10 , and the lower car 5 is provided with upward direction emergency braking devices 11 , 12 . The upward direction emergency braking devices 9 to 12 are relative movement suppressing parts that suppress the upward movement of the upper car 4 and the lower car 5 with respect to the car outer frame 1 .

The emergency braking device 9 in the upward direction is arranged near the guide rail 17, and contacts with the guide rail 17 according to the operation instruction signal from the control panel 16 for the emergency braking device in the upward direction, so as to restrain the movement of the upper car 4 relative to the outer frame 1 of the car. . Specifically, the emergency braking device 9 in the upward direction performs an emergency braking operation, and clamps the guide rail 17 by a clamping mechanism (not shown) as a stop mechanism, thereby restraining the movement of the upper car 4 relative to the outer frame 1 of the car. Inhibition of movement.

The emergency braking device 10 in the upward direction is arranged near the guide rail 18, and contacts with the guide rail 18 according to the operation command signal from the control panel 16 for the emergency braking device in the upward direction, and restrains the movement of the upper car 4 relative to the outer frame 1 of the car. . Specifically, the upward direction emergency braking device 10 clamps the guide rail 18 by a clamping mechanism not shown to generate a restraining force that restrains the movement of the upper car 4 relative to the car outer frame 1 .

Equally, the upward direction emergency brake device 11 is arranged near the guide rail 17, and it contacts with the guide rail 17 according to the operation command signal from the upward direction emergency brake device control panel 16, and restrains the lower car 5 from moving relative to the car outer frame 1. of the mobile. Specifically, the upward direction emergency braking device 11 clamps the guide rail 17 by a clamping mechanism not shown to generate a restraining force for restraining the movement of the lower car 5 relative to the car outer frame 1 .

The emergency brake device 12 in the upward direction is arranged near the guide rail 18, and contacts with the guide rail 18 according to the operation instruction signal from the control panel 16 for the emergency brake device in the upward direction, so as to restrain the movement of the lower car 5 relative to the outer frame 1 of the car. . Specifically, the upward direction emergency braking device 12 clamps the guide rail 18 by a clamping mechanism not shown to generate a restraining force for restraining the movement of the lower car 5 relative to the car outer frame 1 .

The upward direction emergency braking devices 9 to 12 are, for example, devices capable of clamping the guide rails 17 and 18 with a strong force in an instant to fix the upper car 4 or the lower car 5 .

Make the emergency braking devices 9-12 in the upward direction perform emergency braking action and clamp the guide rails 17, 18 with a strong force, thereby suppressing the upper car 4 and the lower car 5 from moving upwards. The guide rails 17, 18 may be worn or damaged during the braking operation. Therefore, it is preferable to arrange the guide rails 17, 18 to be detachably mounted on the car outer frame 1, so that the guide rails 17, 18 can be replaced.

When the car outer frame 1 performs emergency braking (emergency stop) in the upward process, the control panel 16 of the emergency braking device in the upward direction sends an action command signal to the emergency braking devices 9-12 in the upward direction to make it perform emergency braking. stop motion.

The control panel 16 for the emergency braking device in the upward direction is a control section for the emergency braking devices 9 to 12 in the upward direction. As an example, when it is inferred that the car outer frame 1 will rise to a predetermined abnormal position, the control panel 16 for the emergency brake device in the upward direction sends an operation command signal to the emergency brake devices 9-12 in the upward direction, so that the emergency brake devices 9 to 12 in the upward direction are activated. The emergency stop operation is performed before the car outer frame 1 rises to a predetermined abnormal position. The abnormal position refers to the position where the car outer frame 1 is located when the counterweight 13 collides with the buffer 14 . Collision between the counterweight 13 and the buffer 14 causes the car outer frame 1 to come to an emergency stop. In this case, the upper car 4 and the lower car 5 can move up in the car outer frame 1 . The emergency stop action is used to prevent the above-mentioned upward movement of the upper car 4 and the lower car 5 .

In addition, the double-deck elevator of this embodiment has a position detection function and a speed detection function. The position detection function is a function to detect the position of the car outer frame 1, and the speed detection function is a function to detect the moving speed of the car outer frame 1. For example, the hoisting machine 3 for the outer frame of the car may be provided with a rotary encoder that outputs a pulse signal every certain amount of rotation, and the control panel 16 of the emergency braking device in the upward direction detects the position and position according to the pulse signal of the rotary encoder. Moving speed. At this time, the hoist 3 for the car outer frame and the control panel 16 for the emergency braking device in the upward direction actually perform the functions of the position detection part of the car outer frame and the function of the speed detection part of the car outer frame.

The control panel 16 for the emergency braking device in the upward direction predicts whether the car outer frame 1 will rise to an abnormal position based on the moving speed and position of the car outer frame 1 .

The end floor car position detection switch 15 detects whether the car outer frame 1 has ascended to a processing start position at a predetermined distance from the abnormal position in front of (below) the abnormal position where the emergency stop occurred. Specifically, the end floor car position detection switch 15 is set at the processing start position, and is turned on (ON) when the car outer frame 1 reaches its own position.

This processing start position is the position at which the control panel 16 of the emergency braking device in the upward direction starts processing. The raised position of the outer frame 1 is the position where the guide rails 17 and 18 can be clamped by the upward emergency braking devices 9 to 12 . There needs to be a certain distance between the above-mentioned processing start position and the abnormal position, so that even when the car outer frame 1 rises at the maximum speed, it can be ensured that before the counterweight 13 collides with the buffer 14, the emergency braking by the upward direction can be ensured. The control panel 16 of the device judges whether to perform an emergency stop action, and when it is determined that an emergency stop action is performed, an action command signal indicating an emergency stop action is sent, so that the guide rail 17 is actually clamped by the emergency braking devices 9-12 in the upward direction. 18 required time.

When the end floor car position detection switch 15 detects that the car outer frame 1 has risen to the processing start position, the control panel 16 for the emergency braking device in the upward direction starts to restrain the upper car 4 and the lower car 5 from moving relative to the car. The process of raising the outer frame 1 of the compartment.

A series of actions of the double-deck elevator in this embodiment are as follows: When the car outer frame 1 is traveling upward, when the end floor car position detection switch 15 is actuated (turned on), the upward direction The emergency braking device control panel 16 determines whether to activate the upward direction emergency braking devices 9 to 12 based on the moving speed and position of the car outer frame 1 . When it is determined that the emergency brake devices 9 to 12 in the upward direction are activated, the control panel 16 for the emergency brake device in the upward direction causes the emergency brake devices 9 to 12 in the upward direction to clamp the car outer frame 1 before the emergency stop occurs. The guide rails 17,18 at both ends prevent the upper car 4 and the lower car 5 from moving upwards during emergency braking.

The operation of the double-deck elevator of this embodiment will be described in detail below.

In this embodiment, it is assumed that the car outer frame 1 cannot control the speed normally in the process of moving upwards. Although the initial safety device operates, it cannot stop the car outer frame 1, so in this worst case Under the conditions, the balance weight 13 collided with the buffer 14. In addition, it is assumed that upward direction emergency braking devices 9 to 12 for preventing the upper car 4 and the lower car 5 from colliding with the car outer frame 1 due to upward movement are provided at this time. In other words, this function is a safety device that operates at the final stage.

The end floor car position detection switch 15 of FIG. 1 is a trigger to start the calculation process, and the calculation process for actuating the emergency braking devices 9 to 12 in the upward direction is started. The end floor car position detection switch 15 The setting position is in consideration of the time required for the upward direction emergency braking device 9 to 12 to operate when the control panel 16 for the upward direction emergency braking device sends an operation command signal to the upward direction emergency braking device 9 to 12 (upward direction emergency braking device 9 to 12). The starting time of the brake devices 9 to 12), the maximum speed of the car outer frame 1 estimated under the assumption that the safety device is in operation, and the acceleration when the car outer frame 1 becomes a free-falling body because the speed cannot be controlled (free fall acceleration) basis. The installation position of the end floor car position detection switch 15 is determined according to the following formula (1).

L＝VT+1/2AT ² formula (1)

L: The setting position of the end floor car position detection switch 15

A: Acceleration of free fall

V: Maximum speed of car outer frame 1

T: Starting time of emergency braking devices 9 to 12 in the upward direction

L is represented by the distance between the counterweight 13 and the buffer 14 when the car outer frame 1 reaches the setting position of the end floor car position detection switch 15 . All of A, V, and T are constants determined by the structure and installation state of the double-deck elevator.

Fig. 2 is a flowchart showing the operation of the double-deck elevator in this embodiment. The processing shown in FIG. 2 is mainly executed by the control panel 16 for the uplink emergency braking device.

First, the emergency braking device in the upward direction uses the control panel 16 to determine whether the end floor car position detection switch 15 has been actuated, that is, to determine whether the car outer frame 1 has risen to the position where the end floor car position detection switch 15 is located. (step ST01). If it is judged that the car outer frame 1 has not yet risen to the position where the end floor car position detection switch 15 is located, the emergency braking device in the upward direction directly ends the process with the control panel 16. In the present embodiment, since the counterweight 13 collides with the buffer 14 and causes the car outer frame 1 to come to an emergency stop, this function cannot be used except when the car outer frame 1 is close to the uppermost floor. no action.

Next, the control panel 16 for the emergency braking device in the upward direction performs a remaining distance calculation process based on the pulse signal from the rotary encoder (step ST02 ). The so-called remaining distance calculation process refers to the process of calculating the distance (remaining distance) between the balance weight 13 and the buffer 14 .

Thereafter, the upward emergency braking device control panel 16 determines the speed of the upward emergency braking operation based on the remaining distance and the speed pattern of the upward emergency braking operation shown in FIG. 3 (step ST03 ). Fig. 3 is a graph of a speed pattern of an emergency braking operation in the upward direction. The speed pattern of the emergency braking operation in the upward direction is a curve representing the boundary line where the counterweight 13 collides with or does not collide with the buffer 14 according to the relationship between the remaining distance and the moving speed of the car outer frame 1 . In the calculated remaining distance portion shown in FIG. 3 , the speed indicated by the curve of the speed pattern of the emergency braking operation in the upward direction is the speed of the emergency braking operation in the upward direction.

Also shown in FIG. 3 is the curve for the normal speed mode. The normal speed pattern shows the pattern of the speed change when the elevator of this embodiment normally stops at an end floor (uppermost floor). Even if the car outer frame 1 exceeds the set position of the end floor car position detection switch 15 and rises at a moving speed faster than the normal speed pattern, as long as the moving speed is slower than the speed pattern of the emergency braking action in the upward direction , the situation that the balance weight 13 collides with the buffer 14 will not occur.

In addition, the control panel 16 for the upward emergency braking device further detects the actual moving speed of the car outer frame 1 (step ST04), and compares the actual moving speed with the speed of the upward emergency braking operation (step ST05).

With respect to the value of the calculated remaining distance, when the actual moving speed is faster than the speed of the emergency braking operation in the upward direction indicated by the speed pattern of the emergency braking operation in the upward direction, it is estimated that the counterweight 13 will contact the buffer. 14 collides, so it is necessary to perform an emergency stop action to clamp the guide rails 17, 18 by the emergency braking devices 9-12 in the upward direction. On the other hand, with respect to the value of the calculated remaining distance, when the actual moving speed is slower than the speed of the emergency braking operation in the upward direction indicated by the speed pattern of the emergency braking operation in the upward direction, it is estimated that the counterweight 13 is not Since it collides with the buffer 14, there is no need to perform an emergency stop operation in which the guide rails 17, 18 are clamped by the upward emergency braking devices 9-12.

If it is determined in step ST05 that the actual moving speed is faster than the speed of the emergency braking action in the upward direction, the emergency braking device in the upward direction uses the control panel 16 to issue a clamping guide rail 17, 18 operation command signal (step ST06). On the other hand, if it is determined in step ST05 that the actual moving speed is slower than the speed of the upward emergency braking operation, the upward emergency braking device control panel 16 directly ends the process.

As described above, according to the double-deck elevator of this embodiment, when the counterweight 13 collides with the buffer 14 and causes the car outer frame 1 in the upward direction to make an emergency stop, the emergency braking devices 9 to 12 in the upward direction clamp Live guide rail 17,18, can upper car 4 and lower car 5 be fixed on the car outer frame 1, so can prevent upper car 4 and lower car 5 from moving upwards when collision has taken place.

In addition, according to the double-deck elevator of the present embodiment, since it is predicted whether the car outer frame 1 in the upward direction will be stopped in an emergency due to the collision between the counterweight 13 and the buffer 14, and the emergency stop in the upward direction is performed only when it is predicted that a collision will occur. The braking devices 9-12 operate, so it is possible to prevent the upper car 4 and the lower car 5 from moving up when a collision occurs, and when a collision does not occur, the emergency braking device 9 in the upward direction can not be used needlessly. ~12 actions.

In this embodiment, the upward direction emergency braking devices 9 to 12 clamp the guide rails 17 and 18 only when the car outer frame 1 is in an emergency stop, but the present invention is not limited thereto.

The emergency braking devices 9-12 in the upward direction can also be configured to have the function of detecting whether the function of clamping the guide rails 17, 18 is working normally. Preferably, it is arranged so that the emergency braking devices 9 to 12 in the upward direction can be manually clamped to the guide rails 17 and 18 by an inspector, for example, by operating a switch or the like in occasions other than an emergency stop.

Furthermore, the emergency braking devices 9 to 12 in the upward direction may be provided so as to always sandwich the guide rails 17 and 18 while the interval between the upper car 4 and the lower car 5 is not changed. For example, it may also be set so that when the distance between the upper car 4 and the lower car 5 does not change, and the outer frame 1 of the car is running in the upward direction, the emergency braking devices 9 to 12 in the upward direction are clamped in advance. Rails 17, 18. By frequently operating the upward emergency braking devices 9 to 12, it is possible to check whether the upward emergency braking devices 9 to 12 are normal. In addition, the movement of the upper car 4 and the lower car 5 during ascent can be further stabilized.

In addition, it can also be set so that the distance between the upper car 4 and the lower car 5 does not change during the ascent of the car outer frame 1, and the emergency braking devices 9 to 12 in the upward direction are always clamped during this period. Live guide rail 17,18. With such an arrangement, it is possible to detect or predict an emergency stop, and it becomes unnecessary to perform emergency control for operating the upward emergency brake devices 9 to 12 .

The above-mentioned embodiments of the present invention are examples for describing the present invention, and the present invention is not limited to the above-mentioned embodiments. Those skilled in the art can implement the present invention in various other ways without departing from the spirit of the present invention.

Claims (8)

1. A double-deck elevator is characterized in that it has: The outer frame of the car traveling in the up and down direction; a plurality of elevator cars mounted within the outer frame of the cars and adjustable in spacing from one another; a relative movement suppressing portion that suppresses the elevator car from rising relative to the car outer frame; and a control section configured to cause the relative movement before the car outer frame is raised to the abnormal position when it is estimated that the car outer frame is about to rise to a predetermined abnormal position where an emergency stop occurs; A restraining portion restrains the elevator car from rising relative to the car outer frame. 2. The double-deck elevator as claimed in claim 1, further comprising: a car outer frame position detection section for detecting the position of said car outer frame; and a car outer frame speed detecting section for detecting a moving speed of said car outer frame, The control section based on the position of the car outer frame detected by the car outer frame position detection section and the moving speed of the car outer frame detected by the car outer frame speed detection section It is speculated whether the outer frame of the car will rise to the abnormal position. 3. The double-deck elevator according to claim 2, further comprising: a processing start position arrival detection section for detecting whether or not the car outer frame has risen to a processing start position at a predetermined distance from the abnormal position on the near side of the abnormal position, When the process start position arrival detection section detects that the car outer frame has risen to the process start position, the control section starts a process for suppressing the elevator car from rising relative to the car outer frame. processing. 4. The double-deck elevator according to claim 3, characterized in that, The processing start position is that the control section starts the processing in such a manner that the lift of the elevator car relative to the car outer frame can be suppressed before the car outer frame reaches the abnormal position. s position. 5. The double-deck elevator according to claim 1, characterized in that, The car outer frame has guide rails extending in the up and down direction and fixed on the car outer frame, The relative movement suppressing portion has a stop mechanism mounted on the elevator car and in contact with the guide rail according to an instruction from the control portion. 6. The double-deck elevator according to claim 5, characterized in that, The stop mechanism clamps the guide rail according to an instruction from the control section. 7. A control method for a double-deck elevator, which is a double-deck elevator car with an outer car frame traveling in the up and down direction, and a plurality of elevator cars installed in the outer car frame and whose intervals between them can be adjusted A method for controlling an elevator, the method for controlling a double-deck elevator is characterized in that, When it is estimated that the outer frame of the car will rise to a predetermined abnormal position where an emergency stop will occur, before the outer frame of the car rises to the abnormal position, the The rise of the outer frame of the compartment is suppressed. 8. the control method of double deck elevator as claimed in claim 7 is characterized in that, Whether or not the car outer frame will rise to the abnormal position is estimated based on the position of the car outer frame and the moving speed of the car outer frame.