JP2013035620A - Double deck elevator and control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a car from jumping up due to an emergency stop of a double deck elevator including an automatic inter-floor correction mechanism.SOLUTION: The double deck elevator includes: an outer frame car (1) vertically traveling; a plurality of cars (4, 5) which are installed in the outer frame car and of which mutual interval is adjustable; relative movement suppressing parts (9-12) for suppressing relative rise of the car with respect to the outer frame car; and a control part (16) for making the relative movement suppressing parts (9-12) suppress rising of the car relative to the outer frame car, when rising of the outer frame car is suddenly stopped.

Description

  The present invention relates to a double-deck elevator in which two cars are mounted in one outer frame car and raise and lower the two cars together, and more particularly to control during abnormal operation thereof.

  An elevator called a double-deck elevator that has two car cages, an upper car and a lower car, mounted in one outer frame car, and has improved the transport capacity by running these two cars up and down with the outer frame car. There is.

  In the early double deck elevators, the distance between the upper car and the lower car was fixed. However, with this configuration, there is a limitation that the spacing between floors must be the same. Therefore, a double deck elevator having an automatic floor correction mechanism that adjusts the distance between the upper car and the lower car has been developed. The automatic floor correction mechanism is a mechanism that automatically adjusts the distance between the upper car and the lower car. This automatic floor correction mechanism makes it possible to install double deck elevators in buildings with different floor spacings.

  Examples of the automatic floor correction mechanism include a pantograph type and a rope type.

  The pantograph-type automatic floor correction mechanism adjusts the distance between the upper car and the lower car by, for example, installing a pantograph between the upper car and the lower car and expanding and contracting the pantograph.

  On the other hand, the rope-type automatic floor correction mechanism suspends the upper car and the lower car in the outer frame car with a rope, and adjusts the distance between the upper car and the lower car by winding the rope.

  In a double deck elevator equipped with such an automatic floor correction mechanism, as a countermeasure against abnormal operation, in addition to countermeasures against abnormal operation in a normal elevator in which one car travels alone, a double deck elevator It is required to implement specific measures.

  The following is a list of technologies related to countermeasures when an abnormality occurs in a double deck elevator.

  Patent Document 1 discloses a technology that makes it possible to rescue both upper and lower passengers without being trapped when a failure occurs in a double deck elevator. When the double deck elevator disclosed in Patent Document 1 detects a severe failure, it suddenly stops the upper car and the lower car, and then travels at a low speed to the nearest floor where one of the passengers in the car can be rescued, After the rescue is complete, drive at a low speed to the floor where passengers in the other car can be rescued.

  Patent Document 2 discloses a technology that enables provisional continuation of operation of the elevator itself even if an abnormality occurs in the automatic floor correction mechanism. The double deck elevator disclosed in Patent Document 2, when the automatic floor correction mechanism does not function normally, fixes the distance between the upper car and the lower car, and if the upper car and the lower car cannot be landed at the same time, Let them land one by one.

JP 7-41267 A JP 2001-287874 A

  Patent Documents 1 and 2 each disclose that consideration should be taken as a measure peculiar to a double deck elevator when an abnormality occurs. However, there are other events where it is preferable to consider measures specific to double deck elevators.

  As one of them, in a double deck elevator using an automatic floor correction mechanism, there is a concern that some kind of abnormality occurs and the elevator stops emergency, and the car jumps in the outer frame car due to inertia.

  In particular, in the case of a double deck elevator equipped with a rope-type automatic floor correction mechanism, the effect of jumping is weaker than that of the pantograph type, so the effect of the jump is double with a pantograph type automatic floor correction mechanism. It is assumed that it is larger than the deck elevator.

  An object of the present invention is to provide a technique for preventing a double deck elevator equipped with an automatic floor correction mechanism from being brought to an emergency stop and preventing a car from jumping up.

  A double deck elevator according to an aspect of the present invention includes an outer frame car that travels in the vertical direction, a plurality of cars that are mounted in the outer frame car, and the distance between them can be adjusted, and the car is the outer frame. A relative movement restraining portion for restraining the car from rising relative to the car, and when the outer frame car suddenly stops from ascending, the relative movement restraining portion is moved relative to the outer frame car relative to the car. And a control unit that suppresses the rise.

  In addition, when the outer frame car is expected to rise to a predetermined abnormal position where the sudden stop occurs, the control unit, before the outer frame car rises to the abnormal position, the relative movement suppression unit, A relative rise of the car relative to the outer frame car may be suppressed.

  The outer frame car position detecting unit for detecting the position of the outer frame car, and the outer frame car speed detecting unit for measuring the moving speed of the outer frame car, wherein the control unit includes the outer frame The outer frame car rises to the abnormal position based on the position of the outer frame car detected by the car position detecting unit and the moving speed of the outer frame car measured by the outer frame car speed detecting unit. It may be what is predicted.

  In addition, it further includes a process start position arrival detection unit that detects that the outer frame cage has moved up to a process start position that is a predetermined distance before the abnormal position, and the control unit detects the process start position arrival detection When it is detected in the section that the outer frame car has been raised to the processing start position, processing for suppressing a relative rise of the car relative to the outer frame car may be started. .

  The processing start position is a position at which the control unit can start the processing so that a relative rise of the car with respect to the outer frame car can be suppressed before the outer frame car reaches the abnormal position. There may be.

  In addition, the outer frame car has a rail that extends in the vertical direction and is fixed to the outer frame car, and the relative movement suppression unit is attached to the car, and the instruction is given by the control unit. You may have a stop mechanism which contacts a rail.

  Moreover, the said stop mechanism may pinch | interpose the said rail by the instruction | indication from the said control part.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the double deck elevator provided with the automatic floor correction mechanism makes an emergency stop, and a car jumps up.

It is a whole block diagram of the double deck elevator by this embodiment. It is a flowchart which shows operation | movement of the double deck elevator of this embodiment. It is a graph of an upward emergency stop action speed pattern.

  An embodiment of the present invention will be described.

  FIG. 1 is an overall configuration diagram of a double deck elevator according to the present embodiment. The double deck elevator of this embodiment includes a rope-type automatic floor correction mechanism.

  The double deck elevator of this embodiment includes an outer frame car 1, an outer frame car control panel 2, an outer frame car hoisting machine 3, an upper car 4, a lower car 5, an automatic floor correction mechanism control panel 6, and an automatic floor. Hoisting machine 7 for the space correction mechanism, rope 8 for the floor correction, upward emergency stop 9-12, counterweight 13, shock absorber 14, end floor car position detection switch 15, upper safety device control panel 16, and Rails 17 and 18 are provided. The outer frame car control panel 2 and the upward emergency stop control panel 16 are installed in the machine room. The automatic floor correction mechanism control panel 6 is installed on the outer frame car 1. The upper car 4 and the lower car 5 which are passenger cars are mounted in the outer car 1.

  An outer cage 1 and a counterweight 13 are connected to both ends of the same rope. The counterweight 13 is a weight that balances with the outer cage 1 in a state where a predetermined weight corresponding to the total body weight of a predetermined number of passengers is applied to the upper car 4 and the lower car 5. When the outer frame car hoisting machine 3 drives the rope, the outer frame car 1 travels upward or downward. The outer frame car control panel 2 sends an operation command signal to the outer frame car hoisting machine 3 to travel to a desired position.

  If an abnormality occurs while the outer frame car 1 is traveling upward, and the outer frame car 1 travels at an abnormal speed in the upward direction or travels to an abnormal position in the upward direction, control for the outer frame car The panel 2 tries to decelerate or stop the outer cage 1. If the vehicle still cannot be decelerated or if the function of decelerating or stopping does not work, the outer frame car 1 rises to an abnormal position, and at the same time, the counterweight 13 descends to an abnormal position. In that case, the counterweight 13 collides with the shock absorber 14, and the shock absorber 14 receives the counterweight 13 while reducing the impact. At that time, the outer cage 1 is suddenly stopped (emergency stopped).

  The upper car 4 and the lower car 5 are hung in the outer frame car 1 by an inter-level correction rope 8. When the automatic floor correction mechanism winding machine 7 drives the floor correction rope 8, the distance between the upper car 4 and the lower car 5 changes. The automatic floor correction mechanism control panel 6 operates in cooperation with the outer frame car control panel 2 to send an operation command signal to the automatic floor correction mechanism hoisting machine 7, and the upper frame car 1 is stopped at the position where it stops. The distance between the upper car 4 and the lower car 5 is adjusted so that the floor heights of the car 4 and the lower car 5 respectively coincide with the floor height of the desired floor.

  Rails 17 and 18 extending in the vertical direction are fixed in the outer cage 1. The rails 17 and 18 are used to fix the upper car 4 and the lower car 5 to the outer frame car 1 at an emergency stop. The rails 17 and 18 may be specially installed for emergency stop, or rails for restricting the movement of the upper car 4 and the lower car 5 in the outer car 1 only in the vertical direction. You may combine.

  Upper cages 9 and 10 are installed on the upper car 4, and upper emergency doors 11 and 12 are installed on the upper car 5. The upper emergency stops 9 to 12 are relative movement restraining portions that restrain the upper car 4 and the lower car 5 from rising relative to the outer frame car 1.

  The upper emergency stop 9 is in the vicinity of the rail 17 and comes into contact with the rail 17 based on an operation command signal from the control panel 16 for the upper emergency stop device, and the relative movement of the upper car 4 relative to the outer frame car 1 is changed. Suppress. Specifically, the upward emergency stop 9 suppresses the relative movement of the upper car 4 with respect to the outer car cage 1 by sandwiching the rail 17 with a clamp mechanism (not shown) as a stop mechanism as an emergency stop operation. Generate power.

  Further, the upward emergency stop 10 is in the vicinity of the rail 18, contacts the rail 18 based on an operation command signal from the upward emergency stop device control panel 16, and is relative to the outer frame car 1 of the upper car 4. Suppress movement. Specifically, the upper emergency stop 10 generates a force that suppresses the relative movement of the upper car 4 relative to the outer frame car 1 by sandwiching the rail 18 with a clamp mechanism (not shown).

  Similarly, the upper emergency stop 11 is in the vicinity of the rail 17, contacts the rail 17 based on the operation command signal from the upper emergency stop control panel 16, and is relative to the outer frame car 1 of the lower car 5. Control the movement. Specifically, the upper emergency stop 11 generates a force that suppresses relative movement of the lower car 5 relative to the outer frame car 1 by sandwiching the rail 17 with a clamp mechanism (not shown).

  Further, the upper emergency stop 12 is in the vicinity of the rail 18 and comes into contact with the rail 18 based on the operation command signal from the upper emergency stop device control panel 16, so that the lower car 5 is relative to the outer frame car 1. Suppress movement. Specifically, the upper emergency stop 12 generates a force that suppresses relative movement of the lower car 5 with respect to the outer frame car 1 by sandwiching the rail 18 with a clamp mechanism (not shown).

  As an example, the upper emergency stops 9 to 12 sandwich the rails 17 and 18 in a momentary manner and fix the upper car 4 or the lower car 5.

  As the emergency stop operation, the upward emergency stops 9 to 12 pinch the rails 17 and 18 with a strong force to suppress the jumping of the upper car 4 and the lower car 5, so that the rails 17 and 18 are consumed or damaged when the emergency stop operation is performed. It is possible to do. Therefore, it is preferable that the rails 17 and 18 are detachably installed on the outer cage 1 so that they can be exchanged.

  The upper emergency stop control panel 16 sends an operation command signal to the upper emergency stops 9 to 12 to perform an emergency stop operation when the outer frame car 1 suddenly stops (emergency stop) from traveling in the upward direction. Make

It is a control part for upper direction emergency stop 9-12. As an example, the control panel 16 for the upper emergency stop device sends an operation command signal to the upper emergency stops 9 to 12 when the outer frame cage 1 is expected to rise to a predetermined abnormal position. An emergency stop operation is performed before ascending to the abnormal position. This abnormal position is the position of the outer frame car 1 when the counterweight 13 collides with the shock absorber 14. When the counterweight 13 collides with the shock absorber 14, the outer frame car 1 suddenly stops, and the upper car 4 and the lower car 5 try to jump up in the outer frame car 1. The emergency stop operation prevents the jumping up.

  Moreover, the double deck elevator of this embodiment has a position detection function and a speed detection function. The position detection function is a function for detecting the position of the outer frame car 1. The speed detection function is a function for detecting the moving speed of the outer cage 1. For example, the outer cage car hoisting machine 3 includes a rotary encoder that outputs a pulse signal for every fixed rotation amount, and the upper emergency stop device control panel 16 detects the position and the moving speed based on the pulse signal. It may be. In that case, it can be said that the outer frame car hoisting machine 3 and the upper emergency stop device control panel 16 function as an outer frame car position detecting unit and an outer frame car speed detecting unit.

  The upward emergency stop device control panel 16 further predicts whether or not the outer frame car 1 will rise to an abnormal position based on the moving speed and position of the outer frame car 1.

  The end floor car position detection switch 15 detects that the outer frame car 1 has been raised to a processing start position that is a predetermined distance before (below) the abnormal position where an emergency stop occurs. Specifically, the end floor car position detection switch 15 is installed at the processing start position, and is turned on when the outer frame car 1 reaches the position where it is installed.

  This processing start position is set so that the relative rise of the upper car 4 and the lower car 5 with respect to the outer car 1 can be suppressed before the outer car 1 reaches the abnormal position. The upper emergency stop device control panel 16 is a position at which processing is started so that 17 and 18 can be sandwiched. Even when the outer cage 1 rises at the maximum speed, before the counterweight 13 collides with the shock absorber 14, it is determined whether the upper emergency stop device control panel 16 performs an emergency stop operation, and an emergency stop operation is performed. It is necessary to have a distance sufficient to secure the time until the upward emergency stop 9 to 12 actually pinches the rails 17 and 18.

  When the end floor car position detection switch 15 detects that the outer frame car 1 has been raised to the processing start position, the upper emergency stop device control panel 16 has the outer car cages of the upper car 4 and the lower car 5. The process for suppressing the relative increase with respect to 1 is started.

  As a series of operations of the double deck elevator according to the present embodiment, when the outer frame car 1 travels upward and the end floor car position detection switch 15 operates (turns on), the upper emergency stop device control panel 16 Based on the moving speed and position of the car, it is determined whether or not the upward emergency stops 9 to 12 are to be operated. When the upper emergency stop 9 to 12 is operated, the upper emergency stop control panel 16 is provided with rails 17 and 18 which are provided at both ends of the outer cage 1 in advance with the upper emergency stop 9 to 12 before the emergency stop occurs. The upper car 4 and the lower car 5 are prevented from jumping up during emergency stop.

  Hereinafter, the operation of the double deck elevator of the present embodiment will be described in detail.

  In the present embodiment, the shock absorber under the worst condition that the speed cannot be controlled normally while the outer cage 1 is traveling upward, and the first safety device operates but the outer cage 1 cannot be stopped. It is assumed that the counterweight 13 collides with 14. At that time, the upper emergency stops 9 to 12 are installed for the purpose of preventing the upper car 4 and the lower car 5 from jumping up and colliding with the outer frame car 1. In other words, this function is a safety device that operates in the final stage.

As for the installation position of the end floor car position detection switch 15 in FIG. 1 serving as a trigger for starting the arithmetic processing for operating the upward emergency stops 9 to 12, the upward emergency stop control panel 16 is arranged by the upward emergency stop control panel 16. To the operation command signal to the upper emergency stop 9 to 12 (the startup time of the upper emergency stop 9 to 12), and the outer frame car 1 assumed in the situation where the safety device operates And the acceleration (free-run acceleration) when the outer cage 1 becomes free-running and speed control becomes impossible. The installation position of the end floor car position detection switch 15 is represented by Expression (1).
L = VT + 1 / 2AT ² (1)
L: Installation position of the end floor car position detection switch 15 A: Free run acceleration V: Maximum speed of the outer frame car 1 T: Start-up time of the upper emergency stop 9-12

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

  FIG. 2 is a flowchart showing the operation of the double deck elevator according to the present embodiment. The processing shown in FIG. 2 is mainly executed by the upward emergency stop device control panel 16.

  First, the control panel 16 for the upward emergency stop device is raised to the position where the end floor car position detection switch 15 is operating, that is, the outer frame car 1 is moved up to the position where the end floor car position detection switch 15 is installed. It is determined whether or not (step ST01). If the outer frame car 1 is not raised to the position where the end floor car position detection switch 15 is installed, the upward emergency stop device control panel 16 does nothing and ends the process. In the present embodiment, it is assumed that the counterweight 13 collides with the shock absorber 14 and the outer frame car 1 stops suddenly, so that this function is not operated except near the top floor.

  Next, the upper emergency stop device control panel 16 performs a remaining distance calculation process based on the pulse signal from the rotary encoder (step ST02). The remaining distance calculation process is a process for calculating a distance (remaining distance) between the counterweight 13 and the shock absorber 14.

  Next, the upward emergency stop device control panel 16 determines the upward emergency stop operation speed from the remaining distance and the upward emergency stop operation speed pattern shown in FIG. 3 (step ST03). FIG. 3 is a graph of an upward emergency stop operation speed pattern. The upward emergency stop operation speed pattern is a graph showing a boundary of whether or not the counterweight 13 collides with the shock absorber 14 according to the relationship between the remaining distance and the moving speed of the outer frame car 1. In the calculated remaining distance, the speed indicated by the upward emergency stop operation speed pattern graph is the upward emergency stop operation speed.

  FIG. 3 also shows a graph of normal speed patterns. The century speed pattern indicates a speed change pattern when the elevator according to the present embodiment normally stops on the end floor (top floor). Even if the outer cage 1 is moving at a movement speed faster than the normal speed pattern beyond the installation position of the end floor car position detection switch 15, the counterweight 13 is set if it is slower than the upward emergency stop speed pattern. It does not collide with the shock absorber 14.

  Further, the upper emergency stop device control panel 16 detects the actual moving speed of the outer cage 1 (step ST04), and compares the actual moving speed with the upward emergency stop operating speed (step ST05). ).

  In a certain remaining distance, if the actual moving speed is higher than the upward emergency stop operating speed indicated by the upward emergency stop operating speed pattern with respect to the value of the remaining distance, the counterweight 13 is expected to collide with the shock absorber 14. Therefore, it is necessary to perform an emergency stop operation in which the rails 17 and 18 are sandwiched by the upward emergency stops 9 to 12. On the other hand, if the actual moving speed is slower than the upward emergency stop operation speed pattern indicated by the upward emergency stop operation speed pattern at a certain remaining distance, the counterweight 13 collides with the shock absorber 14. Therefore, it is not necessary to perform an emergency stop operation of sandwiching the rails 17 and 18 with the upward emergency stops 9 to 12.

  If the actual moving speed is higher than the upward emergency stop operating speed in step ST05, the upward emergency stop device control panel 16 will operate the operation command signal for sandwiching the rails 17 and 18 between the upward emergency stops 9-12. Is transmitted (step ST06). If the actual moving speed is slower than the upward emergency stop operation speed, the upward emergency stop device control panel 16 ends the process without doing anything.

  As described above, according to the double deck elevator of the present embodiment, when the counterweight 13 collides with the shock absorber 14 and the sudden stop in the upward direction occurs, the rails 17 and 18 are sandwiched by the upward emergency stops 9 to 12, Since the upper car 4 and the lower car 5 are fixed to the outer frame car 1, it is possible to prevent the upper car 4 and the lower car 5 from jumping up during a collision.

  Further, according to the double deck elevator of the present embodiment, it is predicted that the counterweight 13 will collide with the shock absorber 14 and suddenly stop in the upward direction, and only when the collision is expected, the upward emergency stop 9-12. Therefore, the upper car 4 and the lower car 5 are prevented from jumping up at the time of a collision, and the upward emergency stops 9 to 12 are not unnecessarily operated when the collision does not occur.

  In the present embodiment, the upward emergency stops 9 to 12 sandwich the rails 17 and 18 only when the outer frame car 1 is emergency stopped, but the present invention is not limited to this.

  The upward emergency stops 9 to 12 may have a function of checking whether or not the function of sandwiching the rails 17 and 18 operates normally. Even when the emergency stop is not performed, it is preferable that, for example, an inspector can manually perform an operation of sandwiching the rails 17 and 18 between the upward emergency stops 9 to 12 by operating a switch or the like.

  Further, the upper emergency stops 9 to 12 may sandwich the rails 17 and 18 while the distance between the upper car 4 and the lower car 5 is not changed. For example, when the outer cage 1 is traveling upward without changing the distance between the upper cage 4 and the lower cage 5, the upper emergency stops 9 to 12 hold the rails 17 and 18 between them. Also good. The upward emergency stops 9 to 12 can be frequently operated to check the normality. In addition, the behavior of the upper car 4 and the lower car 5 during ascent can be stabilized.

  Further, the distance between the upper car 4 and the lower car 5 is not changed while the outer car 1 is rising, and the upper emergency stops 9 to 12 always sandwich the rails 17 and 18 during that time. Good. By doing so, the emergency control of detecting or predicting the emergency stop and operating the upward emergency stops 9 to 12 becomes unnecessary.

  The above-described embodiments of the present invention are examples for explaining the present invention, and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the present invention in various other modes without departing from the gist of the present invention.

1 outer frame car 2 outer frame car control panel 3 outer frame car winding machine 4 upper car 5 lower car 6 automatic floor correction mechanism control panel 7 automatic floor correction mechanism winding machine 8 Floor correction rope, 9-12 Upward emergency stop, 13 Counterweight, 14 Shock absorber, 15 End floor car position detection switch, 16 Upward emergency stop control panel, 17, 18 rail

Claims (10)

The outer frame that runs in the vertical direction,
A plurality of cars mounted in the outer frame cage and adjustable in mutual distance,
A relative movement restraining portion for restraining the car from rising relative to the outer frame car;
A double-deck elevator having a control unit that causes the relative movement suppression unit to suppress a relative increase of the car relative to the outer frame car when the outer frame car suddenly stops from ascending.   When the outer frame car is expected to rise to a predetermined abnormal position where the sudden stop occurs, the control unit may cause the relative movement suppression unit to move the rider before the outer frame car rises to the abnormal position. The double deck elevator according to claim 1, wherein a relative rise of a car relative to the outer frame car is suppressed. An outer frame car position detector for detecting the position of the outer frame car;
An outer frame cage speed detector for measuring the movement speed of the outer frame cage,
The control unit is configured to determine the outer frame based on a position of the outer frame car detected by the outer frame car position detecting unit and a moving speed of the outer frame car measured by the outer frame car speed detecting unit. Predict whether the car will rise to the abnormal position,
The double deck elevator according to claim 2. A process start position arrival detection unit that detects that the outer frame cage has moved up to a process start position that is a predetermined distance before the abnormal position;
When the processing start position arrival detection unit detects that the outer frame car has risen to the processing start position, the control unit suppresses a relative rise of the car with respect to the outer frame car. Start processing,
The double deck elevator according to claim 3.   The processing start position is a position where the control unit can start the processing so that a relative rise of the car with respect to the outer frame car can be suppressed before the outer frame car reaches the abnormal position. The double deck elevator according to claim 4. The outer frame cage has a rail that extends in the vertical direction and is fixed to the outer frame cage,
The relative movement suppression unit is attached to the car and has a stop mechanism that comes into contact with the rail according to an instruction from the control unit.
The double deck elevator according to claim 1.   The double deck elevator according to claim 6, wherein the stop mechanism sandwiches the rail according to an instruction from the control unit. A control method for a double deck elevator having an outer frame car that travels in the vertical direction, and a plurality of cars that are mounted in the outer frame car and can be adjusted with respect to each other.
A control method for a double deck elevator, wherein when the outer frame car suddenly stops from ascending, a relative rise of the car with respect to the outer frame car is suppressed.   If the outer frame car is expected to rise to a predetermined abnormal position where the sudden stop occurs, the relative rise of the car relative to the outer frame car is increased before the outer frame car rises to the abnormal position. The control method of the double deck elevator of Claim 8 which performs suppression. The method of controlling a double deck elevator according to claim 9, wherein it is predicted whether or not the outer frame car will rise to the abnormal position based on a position of the outer frame car and a moving speed of the outer frame car.

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