JP6818642B2 - Multicar elevator - Google Patents

Description

The present invention relates to a multicar elevator.

Of the multi-car elevators, if the distance between at least two cars is variable, there is a risk of collision if this distance is not maintained properly. In particular, since the elevator can move vertically, the car may fall if the system that drives the car fails. Therefore, each car is equipped with an emergency stop device that prevents the car from falling.

However, the car will fall a certain distance before the emergency stop device functions and the car comes to rest. If the system that drives the car fails while the car is ascending, the car will fall, that is, it will run backwards on the hoistway. Therefore, in the collision prevention technology disclosed in Patent Document 1 and the like, the group management control device instructs the operation operation of all the cars so that the following car does not enter the section in which the reverse driving distance is expected. ing.

International Publication No. 13/140598 Pamphlet

However, in order for the group management control device to control the movement of all the cars, the group management control device measures the position of the car for all the cars, the position detector that measures the position of the car, the drive device that drives the car, and the car falls. It is necessary to communicate with the braking device that stops the car, including the emergency stop device that suppresses the car. Among these communications, there is a problem that collision between the cars cannot be prevented, especially when the communication with the braking device is interrupted or a large delay occurs.

In order to solve such a problem, in a multi-car elevator in which a plurality of cars travel on a common hoistway, each of the plurality of cars has a braking device for braking the car and a position detector for measuring the position of the car. , A communication device that receives the position of the preceding car from the preceding car located immediately before in the traveling direction of the car and transmits the position of the car detected by the position detector to the succeeding car located immediately after in the traveling direction of the car. Provided is a multi-car elevator characterized by including a collision prevention calculator that controls a braking device based on the output of a position detector and the output of a communication device.

The braking device can stop the car so as not to collide with the preceding car even if the communication with the group management control device or the like is delayed or the communication is interrupted due to a device failure or the like.

The figure which shows the device mounted in the car of this invention and the information transmission path between these devices. The whole view of the multicar elevator which concerns on 1st Embodiment of this invention. The flowchart of the process in the collision prevention arithmetic unit of this invention. The whole view of the multicar elevator which concerns on 2nd Embodiment of this invention.

Hereinafter, examples will be described with reference to the drawings.

An embodiment of the present invention will be described with reference to FIGS.

FIG. 2 is an overall view of the multicar elevator according to the first embodiment of the present invention. The hoistway 7 is composed of an ascending passage 11, a descending passage 9, an upper horizontal passage 6, a lower horizontal passage 10, and a wall 8 partitioning them. A plurality of cars 1 are running or stopped in the up passage 11, the down passage 9, the upper horizontal passage 6, and the lower horizontal passage 10. The traveling direction of the car 1 is the up direction in the up passage 11, the down direction in the down passage 9, the direction from the up passage 11 to the down passage 9 in the upper horizontal passage 6, and the lower horizontal passage 10. In, the direction is from the down passage 9 to the up passage 11. A landing terminal 13 is installed at the landing on each floor. The landing terminal 13 has at least a function of transmitting the call information to the group control device 12, that is, the passenger has performed the operation of calling the car. Further, the passengers in the car 1 have specified the disembarkation floor, that is, the disembarkation floor information is also transmitted to the group control device 12, and the group control device 12 is based on the call information and the disembarkation floor information. Make an operation plan and communicate with the communication device 2 of each car 1. Passengers and elevators are not damaged by these call information and disembarkation floor information, such as direct collisions between cars even if communication is interrupted or delayed, and real-time communication requirements are relative. It is low. Therefore, the information / control handled by the group control device 12 has a lower priority than the emergency collision prevention stem of the present invention, and the control performed by the collision prevention calculator 3 and the communication between the communication devices 2 are prioritized.
Here, in FIG. 2, each car 1 runs so as to circulate clockwise, and the order of the cars does not change. In the present invention, a car traveling one front of a car is referred to as a leading car, and a car traveling one behind is referred to as a succeeding car.

FIG. 1 is a diagram showing a device mounted on the car 1 and an information transmission path between these devices. The car 1 includes a communication device 2, a collision prevention calculator 3, a position detector 4, and a braking device 5. The communication device 2 receives at least the position of the leading car and transmits the received position of the leading car to the collision prevention calculator 3. In addition, the current car position information is continuously transmitted to the succeeding car at all times or in a short cycle. The position detector 4 measures the position of the car and transmits the measured position of the car to the collision prevention calculator 3. The braking device 5 brakes the car based on an operation command from the collision prevention calculator 3. Here, the braking device 5 may be an emergency stop that requires manpower to release the braking once it is operated, such as a conventional elevator, but it is preferable that the braking device 5 can release the braking state without human intervention.

FIG. 3 is a flowchart of processing in the collision prevention calculator 3. The operation based on the flowchart of FIG. 3 is as follows.

Step 101: The collision prevention calculator 3 acquires the position of the leading car from the communication device 2. If the time when the communication device 2 receives the position of the preceding car is not updated, the process proceeds to step 102, and if it is updated, the process proceeds to step 103. Step 102: If the time received by the communication device 2 is newer than the predetermined time, the process returns to step 101. If the received time is older than the predetermined time, the process proceeds to step 104. Here, the process of proceeding to step 104 assumes that the preceding car or the communication device of the car cannot communicate with each other due to a failure or communication failure. Step 103: The possibility that the car collides with the leading car is determined from the position of the leading car acquired from the communication device 2 and the position of the car obtained from the position detector 4. Specifically, a collision occurs when the distance between the preceding car and the car concerned is less than a certain distance. If it is determined that a collision occurs, the process proceeds to step 104. If it is determined that there is no collision, the process proceeds to step 105. Step 104: A command is issued to the braking device 5 to brake the car, and the process returns to step 101. Step 105: If the braking device 5 has already been instructed to brake the car, the braking device 5 is instructed to release the braking of the car, and the process returns to step 101. If the braking instruction has not been issued, the process of this step is not performed and the process returns to step 1. If an emergency stop that requires manpower to release the braking is adopted, this step does not exist and the braking is performed in step 104, and an abnormality is reported to the maintenance staff and the remote monitoring center.

In this way, the collision prevention calculator 3 provided in the car 1 determines the possibility of the car colliding with the preceding car based on the position of the car and the position of the preceding car, and commands the braking of the car. To do. As a result, it is possible to prevent the car 1 from colliding with the leading car without mounting the car 1 with a measuring instrument for measuring the relative distance of the leading car, which is used in automobiles and the like. Further, even if the communication between the car 1 and the outside is interrupted or a large delay occurs, this state can be identified in step 102, so that it is possible to prevent the car from colliding with the preceding car.

Preferably, the collision prevention calculator 3 calculates the speed and acceleration of the car from the history of the position of the car, calculates the speed and acceleration of the leading car from the history of the position of the leading car, and then calculates the speed and acceleration of both cars. You may improve the accuracy of the judgment of the possibility of collision by predicting the future acceleration of the car or assuming that both cars move at a constant acceleration.

Further, when braking in step 104, the communication device 2 may issue an emergency braking command to the following car, another car, or the group management device 12.

On the other hand, the fact that the passenger in the car 1 has specified the disembarkation floor, that is, the disembarkation floor information is also transmitted to the group control device 12.

Another embodiment of the present invention will be described with reference to FIG. In FIG. 4, the same elements as those in FIGS. 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 4 is an overall view of the multicar elevator according to the second embodiment of the present invention. The hoistway 7 is composed of an ascending passage 11, a descending passage 9, an upper horizontal passage 6, a lower horizontal passage 10, an intermediate floor horizontal passage 15, and a wall 8 partitioning them. That is, unlike the first embodiment, it is characterized by having an intermediate horizontal passage connecting the up passage and the down passage other than the end floor. A plurality of cars 1 are running or stopped in the up passage 11, the down passage 9, the upper horizontal passage 6, the lower horizontal passage 10, and the intermediate floor horizontal passage 15. The traveling direction of the car 1 is the up direction in the up passage 11, the down direction in the down passage 9, the direction from the up passage 11 to the down passage 9 in the upper horizontal passage 6, and the lower horizontal passage 10. In, the direction is from the down passage 9 to the up passage 11. On the other hand, in the intermediate floor horizontal passage 15, the car 1 travels between the up passage 11 and the down passage 9 in an arbitrary direction. That is, although the car 1 travels so as to circulate clockwise in a broad sense, the length of the circulating path changes by passing through the intermediate floor horizontal passage 15. Then, when passing through the intermediate floor horizontal passage 15, the order of arrangement of the baskets 1 changes. That is, in the second embodiment, the preceding car may be replaced. Further, there is a possibility of collision at the confluence point from the intermediate floor horizontal passage 15 to the up passage 11 or the down passage 9.

Therefore, merging point transmitters 14 are arranged at both ends of the intermediate floor horizontal passage 15 which can be the merging point. The merging point transmitter 14 simulates a state in which a virtual leading car is stopped at the merging point, and transmits the position of this virtual car.

When the operation planner 16 determines the operation plan based on the call information and the disembarkation information, the passing order of the confluence is uniquely determined. Based on this passing order, the operation planner 16 assigns a leading car to each car. Normally, the car existing in front of the up passage 11 and the down passage 9 in the traveling direction is the leading car. However, if there is a merging point between the car existing in front of the traveling direction and the car, and if the passing order of this merging point of the car is the second or later, the merging point transmitter provided at this merging point is provided. 14 is assigned as the lead car. As the car travels, the operation planner 16 updates the passing order of each confluence, and also updates the preceding car assigned to each car.

With such a configuration, even in a multicar elevator where the order of the cars changes, even if the communication between the car 1 and the outside is interrupted or a large delay occurs, the car collides with the preceding car. Can be deterred.

1 ... basket, 2 ... communication device, 3 ... collision prevention calculator, 4 ... position detector, 5 ... braking device, 14 ... confluence point transmitter.

Claims (7)

In a multicar elevator where multiple cars travel on a common hoistway
Each of the multiple cars
A braking device that brakes the car, a position detector that measures the position of the car, and
Communication that receives the position of the preceding car from the preceding car located immediately before in the traveling direction of the car and transmits the position of the car detected by the position detector to the succeeding car located immediately after in the traveling direction of the car. A device and a collision prevention calculator that controls the braking device based on the output of the position detector and the output of the communication device.
The hoistway consists of an up passage dedicated to going up and a down passage dedicated to going down
On the upper and lower floors, a horizontal passage connecting the up passage and the down passage,
The hoistway includes an intermediate floor horizontal passage connecting the up passage and the down passage other than the end floor.
The up passage or the down passage virtually exists at the confluence with the intermediate floor horizontal passage.
It has a confluence transmitter that transmits the position of the car,
The order of the cars passing through the confluence is determined, and each of the plurality of cars
On the other hand, any one of the other car or the confluence transmitter is placed in front of the car.
A multi-car elevator characterized by having an operation planner to be assigned as a car. The multicar elevator according to claim 1.
When the communication device cannot receive the position of the preceding car for a certain period of time, the collision prevention calculator may be used.
A multicar elevator characterized by outputting a braking command to the braking device. The multicar elevator according to claim 2.
The collision prevention calculator is a multicar elevator characterized in that when the distance between the position of the preceding car and the car becomes a predetermined value or less, a braking command is output to the braking device. The multicar elevator according to any one of claims 2 or 3.
The braking device is a braking device capable of shifting from a state in which braking force is applied to a state in which braking force is not applied without human intervention.
The collision prevention calculator outputs a command to release the braking state to the braking device when the distance between the position of the preceding car and the car becomes a predetermined value or more while issuing a braking command to the braking device. A multi-car elevator that features to do. The multi-car elevator according to claim 4, wherein the collision prevention calculator uses the history of the position of the preceding car and the history of the position of the car to indicate the speed or speed of the preceding car and the car. A multi-car elevator characterized in that the acceleration is calculated and the possibility of collision is determined by assuming the constant acceleration motion of the preceding car and the car. The emergency collision prevention system for a multi-car elevator according to claim 1, wherein the collision prevention calculator uses the history of the position of the preceding car and the history of the position of the car to indicate the preceding car and the car. A multi-car elevator characterized in that the speed or the speed and the acceleration are calculated, and the acceleration pattern of the preceding car and the car is predicted to determine the possibility of a collision. The multicar elevator according to claim 1.
A group management device for managing the allocation of the plurality of cars and transmitting a destination floor command to the communication devices of the plurality of cars is provided.
Rather than communication between the group management device and the communication device of the plurality of cars.
The priority of communication between the communication devices in the plurality of cars is high.
A multicar elevator that features that.

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