JP2023110254A - Elevator device - Google Patents

Abstract

To provide an elevator device being advantageous for performing safety monitoring by a door-opened traveling protection device even when transmission delay in a signal occurs.SOLUTION: An elevator device includes: a door opening/closing detection device for detecting an opened/closed state of a door of an elevator; a brake device for braking the traveling of the car of the elevator; and a door-opened traveling protection device for transmitting a braking command signal for stopping the car to the brake device when the signal in the opened/closed state serially transmitted from the door-opening/closing detection device is a signal indicating the door-opened state and a position of the car deviates from a range of a door-opening allowable zone where an opened-state of the door is permitted. The door-opened traveling protection device is configured to variably set the range of the door-opening allowable zone in accordance with the car speed.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present disclosure relates to an elevator apparatus having an open door running protection device that prevents a car from running with the door open.

In conventional elevator systems, detectors detect car speed, car travel, and floor reference positions. The safety controller compares the detection result of the detection device with a car speed abnormality determination threshold value set for the position of the car to determine whether the door is running abnormally. The safety controller also calculates a landing reference position for the car to land on the floor and a determination distance from the landing reference position to the car position. The abnormality determination threshold is set to decrease as the determination distance increases.

JP 2014-139106 A

Consider a configuration in which the open/closed state of a car door by a car door closing switch is acquired by means of functional safety communication specified in the international standard IEC 61784-3, for example. In this case, it is necessary to mutually check the contents received by two independent systems as a duplicate system, and it is necessary to transmit multiple times for the purpose of improving reliability, so there is a transmission delay of the door closing switch of the car. , there is a risk that it will become so large that it cannot be ignored in terms of safety monitoring. In this case, since the opening/closing timing of the door closing switch is transmitted later than the actual timing, there is a possibility that safe operation cannot be executed at appropriate timing. The technique of Patent Literature 1 does not consider such effects of signal transmission delay.

The present disclosure has been made in order to solve the above problems, and in an elevator equipped with a door open protection device, even if there is a signal transmission delay, the safety monitoring is performed by the door open protection device. It is an object of the present invention to provide an elevator device that is advantageous in

The elevator apparatus of the present disclosure includes a door open/close detection device that detects the open/closed state of the doors of the elevator, a brake device that brakes the running of the elevator car, and a door open/close state signal serially transmitted from the door open/close detection device. This is a signal indicating the door open state, and when the car position is out of the range of the door open permission zone where the door open state is permitted, a braking instruction signal is sent to the brake device to stop the car. and a door open travel protection device. The door-open running protection device is configured to variably set the range of the door-open permission zone according to the speed of the car.

According to the elevator system of the present disclosure, the range of the door-opening permission zone is set according to the car speed. Thus, the effect of changes in car speed during transmission delay can be included in the determination of whether the car position falls outside the allowed door open zone. As a result, it is possible to provide an elevator control device that is advantageous in performing safety monitoring using the door-open protection device even when there is a signal transmission delay.

1 is a configuration diagram showing a configuration of an elevator device 100 according to an embodiment of the present disclosure; FIG. FIG. 11 is a diagram showing an outline of a door-opening permission zone of a comparative example; FIG. 2 is a diagram showing an outline of a door open permission zone according to an embodiment of the present disclosure; FIG. 4 is a time chart showing various states of the car when running with the door open is detected; FIG. 5 is a diagram for explaining the relationship between the braking distance and the distance to be secured when the car 14 travels upward with the doors open; 4 is a flow chart showing a routine of processing executed in the protection device 50 for running with the door open according to the embodiment of the present disclosure; FIG. 5 is a diagram showing a modified example of hardware resources of the protection device 50 for traveling with the door open;

Embodiments will be described below with reference to the drawings. In addition, the same code|symbol is attached|subjected to the element which is common in each figure, and the overlapping description is abbreviate|omitted.

Embodiment.
1. Configuration of Elevator Apparatus FIG. 1 is a configuration diagram showing a configuration of an elevator apparatus 100 according to an embodiment of the present disclosure. In FIG. 1, a hoist 4 is installed above the hoistway 2 . The hoisting machine 4 has a drive sheave 6 , a hoisting machine motor (not shown) for rotating the drive sheave 6 , and a pair of brake devices 8 for braking the rotation of the drive sheave 6 .

A baffle wheel 10 is installed above the hoistway 2 at a distance from the drive sheave 6 . A suspension 12 is wound around the drive sheave 6 and the deflector wheel 10 . A plurality of ropes or a plurality of belts are used as the suspension 12 .

A car 14 is connected to one end of the suspension 12 . A counterweight 16 is connected to the other end of the suspension 12 . The car 14 and counterweight 16 are suspended within the hoistway 2 by suspensions 12 . The car 14 and counterweight 16 are raised and lowered in the hoistway 2 by rotating the drive sheave 6 . The brake device 8 brakes the traveling of the car 14 by braking the rotation of the drive sheave 6 .

A car door 20 for opening and closing the doorway of the car is mounted on the front surface of the car 14.例文帳に追加A landing door 22 for opening and closing the landing doorway is provided at the landings of the plurality of stop floors. The car door 20 and the landing door 22 are elevator doors. The car door 20 is provided with a car door closing switch 52 for detecting whether the car door 20 is opened or closed. A landing door closing switch 54 for detecting the open/closed state of the landing door 22 is installed on the landing door 22 . The car door close switch 52 and the landing door close switch 54 output ON signals when the doors are closed, and output OFF signals when the doors are open. The car door close switch 52 and the landing door close switch 54 are also called "door open/close detectors".

In the hoistway 2, a detected member 24 is installed at a floor reference position. The detected material 24 does not need to be installed on all floors, and may be installed at positions other than the floors. In FIG. 1, one landing door 22 and one detected member 24 are illustrated.

The detected material 24 is arranged at a position corresponding to the relevel zone of the corresponding floor. The relevel zone here is a zone used when performing relevel operation of the car 14 . The relevel zone is set to have the same range as the door-opening permission zone, which is the region in which the door opening of the car 14 is permitted, or a narrower range. A landing position detector 26 is installed on the car 14 . The landing position detector 26 is for specifying the absolute position of the car 14 in the hoistway 2 by detecting the material 24 to be detected. The landing position detector 26 and the material to be detected 24 are an example of a "cage state detector" that detects the absolute position or movement amount of the cage 14 .

Signals from the car door close switch 52 and landing door close switch 54 and the signal from the landing position detector 26 are serially transmitted to the door open protection device 50 via a safety communication path 56 . The safety communication path 56 is functional safety communication defined by the international standard IEC 61784-3. The safety communication path 56 performs mutual checks on the contents received by two independent systems as a duplex system, and performs multiple transmissions for the purpose of improving reliability. Therefore, a transmission delay occurs before the car door closing switch 52 and the landing door closing switch 54 receive the signals from the car door closing switch 52 and the door open protection device 50 . Details of the door-open protection device 50 will be described later.

A speed governor 30 is installed in the upper part of the hoistway 2 . The governor 30 has a governor sheave 32 . A governor rope 34 is wound around the governor sheave 32 . The speed governor rope 34 is looped in the hoistway 2 and connected to the car 14 . Also, the governor rope 34 is wound around a pulley 38 arranged at the bottom of the hoistway 2 .

The governor sheave 32 rotates as the car 14 moves up and down. That is, when the car 14 ascends and descends, the governor rope 34 circulates and the governor sheave 32 rotates at a rotational speed corresponding to the running speed of the car 14 . The governor sheave 32 is provided with a car movement amount detector 40 that generates a signal corresponding to movement of the car 14 . As the car movement amount detector 40, for example, an encoder or resolver that generates a signal corresponding to the rotation of the governor sheave 32 is used. The car movement amount detector 40 may be installed in the hoisting machine 4 as a device that generates a signal according to the rotation of the drive sheave 6 of the hoisting machine 4 . The car movement amount detector 40 is an example of a car state detector.

The car movement amount detector 40, the material to be detected 24, and the landing position detector 26 as car state detectors may be substituted with other known configurations. For example, these configurations may be replaced by a configuration in which a tape capable of specifying the absolute position in the hoistway 2 is installed in the hoistway 2 and read by a tape reading sensor installed in the car 14 .

Operation of the car 14 is controlled by a control device 60 . The control device 60 detects the position and speed of the car 14 from the signal from the car movement amount detector 40 . Further, the control device 60 performs the relevel operation when the car 14 has landed on the stop floor and the door is open. The control device 60 corrects vertical displacement of the car floor caused by passengers getting on and off, and returns the car floor to the level position by the relevel operation.

The door-open running protection device 50 is for restricting the car 14 from running with the car door 20 or the landing door 22 open. Signals output from the floor landing position detector 26 and the car movement amount detector 40 are sent to the door open protection device 50 . A door-open permission zone, which is a zone in which the car 14 is permitted to move while the door is open, is set in the door-open protection device 50 . In the present disclosure, the open door zone is coextensive with the relevel zone. When the car 14 moves out of the door-opening permission zone during the relevel operation of the car 14 with the door open, the protection device 50 cuts off the power of the hoisting machine 4 with a relay or the like, Stop the car 14. Further, when the car speed exceeds the monitoring reference speed when releveling the car 14 with the door open, the protection device 50 cuts off power to the hoisting machine 4 by a relay (not shown) or the like, and brakes. Device 8 causes car 14 to stop.

2. Features of Elevator Device The door-open protection device 50 in the elevator device 100 variably sets the range of the door-open permission zone according to the speed of the car. FIG. 2 is a diagram showing an outline of a door-opening permission zone of a comparative example. FIG. 3 is a diagram showing an outline of the door-opening permission zone according to the present embodiment. 2 and 3, the vertical axis indicates the floor position of the car 14 on the hoistway 2, and the horizontal axis indicates the monitoring level of the car speed of the car 14. As shown in FIG.

In the comparative example shown in FIG. 2, the range of the door opening permission zone is set constant regardless of the speed within the range up to the monitoring reference speed. On the other hand, the range of the door opening permission zone in the embodiment shown in FIG. 3 is set so as to decrease in proportion to the car speed within the range up to the monitoring reference speed.

The amount of decrease in the door-opening permission zone may be set using a value obtained by multiplying the maximum transmission delay time by the car speed. The maximum transmission delay time here is the maximum value of the delay time until the door open/close signal transmitted from the car door closing switch 52 is received by the door open protection device 50 . The maximum transmission delay time is a value determined according to the performance of the transmission path and various components, and for example, a value measured in advance by a transmission test or the like or a designed value in system design is used. The value obtained by multiplying the maximum transmission delay time by the car speed corresponds to the distance traveled during the maximum transmission delay time at that car speed. If the amount of decrease in the door-opening permission zone is set only by the car speed, depending on the maximum transmission delay time, the position of the car during relevel operation may exceed the range of the door-opening permission zone, which may reduce serviceability. . By using the maximum transmission delay time and car speed to set the amount of decrease in the door-opening permission zone, the car position, which changes depending on the maximum transmission delay time, does not exceed the range of the door-opening permission zone in relevel operation. Can be set. As a result, the performance constraints of relevel operation can be eliminated, and the service performance during relevel operation can be maximized.

FIG. 4 is a time chart showing various states of the car when running with the door open is detected. Hereinafter, features of the protection device 50 for running with the door open according to the embodiment will be described with reference to the time chart of FIG.

In the time chart of FIG. 4, (A) shows the door opening/closing signal transmitted from the car door closing switch 52. In FIG. (B) shows the door open/close signal received by the door open protection device 50 . The door open/close signal of (A) represents a signal before being transmitted to the protection device 50 for running with the door open, and is hereinafter referred to as a "transmitted front door open/close signal". Further, the door open/close signal (B) represents the door open/close signal after being transmitted to the protection device 50 for running with the door open, and is hereinafter referred to as "post-transmission door open/close signal". (C) indicates car speed and (D) indicates car position. Note that (D) describes the door opening permission zones of the comparative example and the working example, and the car positions of the comparative example and the working example, respectively.

At time t1, the car 14 is stopped at the stop floor at the level position with the door closed. Therefore, the transmitted front door open/close signal and the transmitted rear door open/close signal are both ON, the car speed is 0, and the car position is at the level position. When the time t1 has passed, the car 14 starts traveling upward. As a result, the car speed starts to increase, and the range of the door opening permission zone of the embodiment starts to decrease accordingly. It should be noted that the range of the door opening permission zone in the comparative example does not change according to the speed of the car, so it is constant from beginning to end.

At time t2, the transmission front door opening/closing signal is turned off due to the car door 20 being in the open state. However, since there is a transmission delay in the safety communication path 56, the transmitted rear door open/close signal remains ON.

At time t3, the car position of car 14 exceeds the range of the door open permission zone of the embodiment. However, at this point, the car 14 is not braked because the post-transmission door open/close signal transmitted to the door open protection device 50 is still ON.

At time t4, the post-transmission door opening/closing signal transmitted to the protection device 50 for protecting the door from running with the door open turns OFF, and the protection device 50 for protecting the door from running with the door open determines whether the door is open. At time t4, the car position of the car 14 exceeds the range of the door opening permission zone of the embodiment. Therefore, the open-door running protection device 50 determines that the car 14 with the door open is running outside the open-door permitted zone, and transmits a braking command to the control device 60 to stop the car 14 . . The control device 60 receives the braking command and operates the braking device 8 to start braking the car 14 . After time t4, the car 14 gradually decelerates and the car speed becomes zero.

On the other hand, in the range of the door-opening permission zone of the comparative example, at time t4, the car position of the car 14 does not exceed the range of the door-opening permission zone of the comparative example. Therefore, even if the door open state is determined at time t4, the door open running protection device 50 does not transmit a braking command for stopping the car 14 at time t4. Then, at time t5, when the car position of the car 14 exceeds the range of the door open permission zone of the comparative example, the door open running protection device 50 transmits a braking command for stopping the car 14 to the control device 60. .

Thus, when the range of the door-opening permission zone of the embodiment is used, braking is started at an earlier timing after receiving the post-transmission door open/close signal than when the range of the door-opening permission zone of the comparative example is used. Therefore, the moving distance of the car 14 due to traveling with the door open can be shortened. As a result, it becomes easier to secure the distance from the top of the landing door 22 to the car floor or the distance from the bottom of the landing door 22 to the top of the car doorway, which should be secured when traveling with the doors open. As a result, the elevator system 100 is provided which is advantageous in safety monitoring by the door-open protection device 50 .

The setting method and setting range of the range of the door-opening permission zone are not limited as long as the range is set so as to decrease according to the speed. For example, the range of the door open permission zone can be set based on the following considerations. FIG. 5 is a diagram for explaining the relationship between the braking distance and the distance to be secured when the car 14 travels upward with the doors open. The concept is the same when the car 14 travels downward with the doors open. When the car 14 travels at the maximum speed that does not exceed the monitoring reference speed, in the case where the car position is moving to the highest position, the door closing switch 52 of the car door close switch 52 is closed at the boundary position of the door opening permission zone when the car speed is 0. An open signal is detected. As a result, the door-open running protection device 50 detects that the door is running with the door open, and the control device 60 operates the brake device 8 of the hoist 4 to brake the car 14 . At this time, from the distance D1 between the top of the landing door 22 and the bottom of the landing door 22, the sum of the distance D2 from the bottom of the landing door 22 to the end of the door opening permission zone when the car speed is 0 and the braking distance D3 is subtracted. The range of the door-open permission zone when the car speed is 0 is set so that the distance D4 (=D1-(D2+D3)) is the distance that should be secured when the car is running with the door open. This distance D4 is a distance that does not lead to a serious accident such as a person being caught in the car 14, for example. The range of the door-opening permission zone is set so that it decreases from the range of the door-opening permission zone when the set car speed is 0, as the speed increases. According to this method of setting the door-open permission zone, the distance D4 is ensured when the protection device 50 detects traveling with the door open within a range in which the car 14 does not exceed the monitoring reference speed. be able to.

3. Specific Processing Executed in Protection Device 50 from Running with Door Open of Embodiment The protection device from running with door open 50 includes a processor and a storage device. The processor executes various processes. A processor is, for example, a microcomputer. Various types of information are stored in the storage device. A volatile memory, a non-volatile memory, etc. are illustrated as a memory|storage device. Various programs are stored in the storage device. The functions of the protection device 50 for running with the door open are realized by the processor executing various programs. Various data are stored in the storage device.

FIG. 6 is a flow chart showing a routine of processing executed in the protection device 50 for running with the door open according to the embodiment of the present disclosure. The routine shown in FIG. 6 is executed by the processor of the door open protection device 50 when the program is executed.

In step S100 of FIG. 6, it is determined whether or not a post-transmission door open/close signal indicating the door open state has been received. As a result, when the establishment of the determination is not recognized, the process of this routine is terminated, and when the establishment of the determination is recognized, the process proceeds to step S102.

In step S102, using the signal received from the car movement amount detector 40, the car position and car speed of the car 14 are calculated. In the next step S104, the range of the door-opening permission zone is set to the range corresponding to the calculated car speed according to the relationship between the car speed and the door-opening permission zone shown in FIG.

In the next step S106, it is determined whether or not the car position is included in the range of the door-opening permission zone. As a result, when the establishment of the determination is not recognized, the processing of this routine is terminated, and when the establishment of the determination is recognized, the processing proceeds to step S108.

In step S108, a braking instruction signal for driving the braking device 8 to stop the car 14 is sent to the control device 60. FIG.

4. Modifications The elevator apparatus 100 according to the embodiment may adopt the following modifications.

The door open protection device 50 and the control device 60 may be configured as a single control device.

FIG. 7 is a diagram showing a modification of the hardware resources of the protection device 50 for protection against running with the door open. In the example shown in FIG. 7, the open door running protection device 50 comprises processing circuitry 508 including, for example, a processor 502, a memory device 504, and dedicated hardware 506. As shown in FIG. FIG. 7 shows an example in which a part of the functions of the protection device 50 for protection against running with the door open is implemented by dedicated hardware 506 . All of the functions of the protection device 50 for protection against running with the door open may be realized by dedicated hardware 506 . Dedicated hardware 506 can be a single circuit, multiple circuits, programmed processors, parallel programmed processors, ASICs, FPGAs, or combinations thereof.

2 hoistway 4 hoisting machine 6 drive sheave 8 brake device 10 deflector 12 suspension 16 counterweight 20 car door 22 landing door 24 material to be detected 26 landing position detector 30 speed governor, 32 speed governor sheave, 34 speed governor rope, 38 pulley, 40 car movement amount detector, 50 door open running protection device, 52 car door closing switch, 54 landing door closing switch, 56 safety communication Road, 60 Control Device, 100 Elevator Device, 502 Processor, 504 Storage Device, 506 Dedicated Hardware, 508 Processing Circuit

The elevator apparatus of the present disclosure includes a door open/close detection device that detects the open/closed state of the doors of the elevator, a brake device that brakes the running of the elevator car, and a door open/close state signal serially transmitted from the door open/close detection device. This is a signal indicating the door open state, and when the car position is out of the range of the door open permission zone where the door open state is permitted, a braking instruction signal is sent to the brake device to stop the car. and a door open travel protection device. The door open run protection device is configured to decrease the extent of the door open permission zone in proportion to car speed . Alternatively, the door-open running protection device multiplies the car speed by the maximum transmission delay time, which is the maximum time required for the open/closed state signal transmitted from the door opening/closing detection device to be received by the door-open protection device. Based on this, it is configured to reduce the extent of the door open permission zone.

Claims (5)

a door opening/closing detection device for detecting the opening/closing state of an elevator door;
a brake device for braking the running of the elevator car;
The open/close state signal serially transmitted from the door open/close detection device is a signal indicating the open state of the door, and the car position is within the range of the door open permission zone in which the open state of the door is permitted. a door-open running protection device that, when disengaged, transmits a braking instruction signal for stopping the car to the brake device;
The door open travel protection device includes:
An elevator device configured to variably set the range of the door-opening permission zone according to the speed of the car. The door open travel protection device includes:
2. The elevator system of claim 1, configured to decrease the extent of said allowed door opening zone in proportion to said car speed. The door open travel protection device includes:
Based on the value obtained by multiplying the car speed by the maximum transmission delay time, which is the maximum time required for the open/close state signal transmitted from the door opening/closing detection device to be received by the door open protection device, 2. Elevator apparatus according to claim 1, configured to reduce the extent of the permitted opening zone. further comprising a car state detector that detects the movement amount or absolute position of the car;
The door open travel protection device includes:
4. An elevator system according to any one of claims 1 to 3, configured to calculate the car speed using signals received from the car status detector. The elevator doors include a landing door installed at the landing and a car door installed at the car,
The door opening/closing detection device includes:
a landing door close switch for detecting an open/closed state of the landing door;
a car door closing switch for detecting the open/closed state of the car door;
5. An elevator system according to any one of claims 1 to 4, comprising:

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