JP2013112464A - Operation management system for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of continuing safe operation management on an elevator regardless of any state of a main cable without causing malfunction of an emergency stop device.SOLUTION: A safety controller 50 calculates a traveling direction, a moving speed, and a moving distance of the car 1 and balancing weight 8 of an elevator based upon pulse signals from encoders 22, 32 fitted to governors 21, 31 of the car 1 and balancing weight 8, and determines the state of the main cable from the calculation result thereof. If the main cable is abnormal, the safety controller 50 makes emergency stop devices 25, 35 operate.

Description

  The present invention relates to an elevator operation management system, and in particular, determines the state of a main rope that connects a car and a counterweight, and controls safe operation of the car according to the determination result. The present invention relates to an elevator safe operation management system.

  Conventionally, an elevator has been provided with a control device for safely operating a car. As this type of control device, for example, in Japanese Patent Application Laid-Open No. 2004-107075, the moving state of an elevator car is monitored by a speed governor having a structure in which a speed governor wire is wound between upper and lower sheaves. An abnormality detection mechanism provided in a lifting machine such as an elevator configured to operate an emergency stop device when a fall is detected is disclosed.

  This anomaly detection mechanism is applied to a lifting machine in a play facility in which an emergency stop device used in a normal elevator lowers a lifting car in the same state as a free fall so that a weightless state can be experienced. In order to solve the problem that it is not possible to determine whether the elevator car is falling freely in normal operation or due to abnormalities such as cutting of the main rope, The speed control mechanism is configured as follows.

  The upper sheave on the elevator car side and the counterweight side are close to each other and are rotatably provided on a common rotating shaft. A stopper device is rotatably provided on the common rotating shaft between the left and right sheaves, and the stopper device has a common rotation. A stopper screw is provided so as to be able to advance and retreat with respect to the shaft, an annular rack portion is formed on the facing surface of each sheave, and a differential gear engaged with these racks is fixed to the stopper screw.

  When an abnormality occurs such as the main rope being cut, the lifting weight and the counterweight fall freely independently. Then, the elevator car side speed control wire and the counterweight side speed control wire move in the opposite directions to those in the normal operation, and the respective sheaves also rotate in the opposite directions.

  When each sheave rotates in the opposite direction, the differential gears engaged with the racks rotate, and the tip of the stopper screw presses against the outer periphery of the common rotating shaft, making it impossible to rotate the common rotating shaft. Become. As a result, when the emergency stop lever is pulled up by the speed control wire, the emergency stop device operates, and the emergency stop wedge bites into the guide rail 4, thereby preventing the elevator car from falling.

JP2004-107075

  Since the abnormality detection mechanism according to the above-described prior art does not consider the extension of the main rope due to the load of the car and the counterweight, the extension of the main rope only causes the safety operation of the elevator. Even if it is not, this cannot be distinguished from cutting of the main rope, and there is a problem that the emergency gear is operated immediately and the emergency stop device malfunctions. On the other hand, in order to prevent malfunction of the emergency stop device, if the abnormality detection device is operated so as not to be affected by the extension of the main rope, there is a possibility that the main rope may be missed.

  Therefore, an object of the present invention is to provide a system capable of continuing safe operation management of an elevator without causing an emergency operation of an emergency stop device regardless of a state of a main rope.

  In order to achieve the above object, the elevator operation management system according to the present invention determines the state of the main rope from the operation state of the car and the counterweight, and performs emergency stop according to the determined state of the main rope. This is characterized in that the safe operation of the elevator can be continued without causing the device to malfunction.

  According to the elevator operation management system according to the present invention, since the state of the main rope can be determined, it is possible to prevent the emergency stop device from being erroneously stopped only by the expansion or contraction of the main rope. However, safe operation management of the elevator can be continued.

  ADVANTAGE OF THE INVENTION According to this invention, the operation management system of the elevator which can continue the safe operation management of an elevator can be provided irrespective of the state of a main rope, without being accompanied by the malfunction of an emergency stop apparatus.

It is a block block diagram of embodiment of the operation management system of an elevator based on this invention. It is a block block diagram of the safety controller provided in the operation management system of an elevator which manages the safe operation of an elevator. It is a flowchart which shows an example of operation | movement of a safety controller.

  FIG. 1 is a block diagram according to an embodiment of an elevator operation management system. The elevator will be described by taking as an example a machine room-less type that does not require a machine room on the roof. In this type of elevator, the hoisting machine and the control panel are arranged in a hoistway.

  The hoisting machine 2 raises and lowers the car 1 and the counterweight 8 by hoisting the main rope 13 that connects the car 1 and the counterweight 8. The hoisting machine 2 is driven by an inverter 5 connected to an AC power source 7 via a cutoff circuit 6. When the safety controller 50 detects the operation of the car door switch 90 and the landing door switches 91 to 93 while the car 1 is running, the shutoff circuit 6 is activated and the power supplied to the hoisting machine 2 is cut off. The driving of the hoisting machine 2 is stopped. The hoisting machine brake 3 is always in an operating state with respect to the hoisting machine, but releases the braking force on the hoisting machine only while the brake 3 is energized.

  The car 1 and the counterweight 8 are connected to the governor ropes 24 and 34 via the governors 21 and 31, the car gripping device 28 and the counterweight gripping device 38, respectively. The governor rope moves with the movement of the car 1 and the counterweight 8, and the governors 21 and 31 rotate accordingly to adjust the speeds of the car 1 and the counterweight 8t.

  The governor 21 (31) includes a governor gripping device 23 (33). When the car 1 and the counterweight 8 are accelerated beyond the rated speed, the governor gripping device grips the governor ropes 24 and 34, and the emergency stop devices 25 and 35 sandwich the guide rails 26 and 36. The car 1 and the counterweight 8 are emergency stopped.

  The final limit switches 11 and 12 are normally in an off state. However, when the car 1 moves downward or upward from the level of the terminal floor, the final limit switches 11 and 12 are turned on, and the breaking circuit 6 and the hoisting machine brake 3 are turned on. Is operated to stop the hoisting machine 2 and to prevent the car 1 from going too far downward, upward or downward from the terminal floor.

  There is an encoder 22 attached to the governor 21 as a detector for the operating state of the car 1. Similarly, there is an encoder 32 attached to the governor 31 as a detector for the operation state of the counterweight 8. As the governor 21 (31) rotates, the encoder 22 (32) also rotates, and a pulse signal is generated from the encoder 22 (32).

  The elevator control device 60 in the vicinity of the hoistway includes a control controller 40 and a safety controller 50. The controller 0 detects the input signals of the car operation panel 80 and the landing buttons 81, 82, 83, and controls the inverter 5 based on the detected signals, thereby controlling the operation of the car 1. The controller 40 further detects the moving distance, moving speed, and moving direction of the car 1 and the counterweight 8 by the change of the pulse signal, and further, by the specific distance sensing device 70 and the shielding plates 71, 72, 73, The door zone of each floor is detected, and the car is stopped on each floor.

  The safety controller 50 detects that at least one of the speed of the car 1 and the counterweight 8 has been exceeded due to a change in the pulse signal, and further that the car 1 has exceeded the specified position via the final limit switches 11 and 12. Is detected, the cutoff circuit 6 of the hoisting machine 2 and the hoisting machine brake 3 are actuated based on these detected values, and the governor gripping devices 23 and 33 and the emergency stop devices 25 and 35 are actuated. The car 1 and the counterweight 8 are emergency stopped.

  Shock absorbers 27 and 37 are provided in the pits of the hoistway. The shock absorber 27 stops the car 1 with a small impact when the car 1 is not stopped by the operation of the hoisting machine brake 3 and the emergency stop device 25 or the like. The shock absorber 37 is used to prevent the counterweight 8 from entering the living space when there is a living space under the pit and the counterweight 8 is not stopped even if the safety device 35 or the like is activated. .

  FIG. 2 is a hardware block diagram of the safety controller 50. The safety controller 50 includes an I / F (interface) 300 for input signals and output signals, an elevator safe operation management program (FIG. 3) described later, and a memory in which control data necessary for executing the program is recorded. 302 and a processor (CPU) 304 for calculating an output signal by executing a safe operation management program while referring to the control data based on the input signal.

  The main input signals are a pulse signal from the first encoder 22 provided in the car governor 21 and a pulse signal from the second encoder 32 provided in the counterweight 8 governor 31. Based on the change of these pulse signals, etc., the processor calculates the operation status such as the traveling direction, the moving distance, and the moving speed of the car and the counterweight, and quickly determines the state of the main rope from the calculation result.

  The state of the main rope is the extension of the main rope, the contraction of the main rope, the cutting of the main rope, or the entanglement of the main rope. Even if the main rope is extended, if the main rope does not cut, there is no obstacle to the safe operation of the elevator, and even if the main rope is contracted, it must be entangled with the main rope. There is no hindrance.

  The processor decelerates, normally stops, or emergency stops the car if there is a situation in the main rope that exceeds or exceeds the elevator safety management requirements. On the other hand, even if the main rope has an elongation that causes no problem in safety management, this prevents a state in which the car is stopped (elevator malfunction).

  FIG. 3 is a flowchart of the elevator safe operation management program. This flowchart is continuously executed until the elevator is stopped by the safety controller 50. FIG. 3 shows a process flow from when the safety controller 50 detects a signal from the encoder to when the elevator is stopped.

  First, in step 101, the safety controller 50 determines the safety car 50 and the counterweight 8 based on the pulse signals from the encoders 22 and 32 that are rotated by the rotation of the respective governors 21 (31) of the car 1 and the counterweight 8. Each traveling direction is determined.

  The safety controller 50 causes the car 1 and the counterweight 8 to move in opposite directions, that is, the car 1 is advanced upward and the counterweight 8 is advanced downward, or the car 1 is advanced downward, If it is determined that the counterweight 8 is traveling in the upward direction, the process proceeds to step 102; otherwise, the process proceeds to step 105.

  In step 102, in a state where the car 1 and the counterweight 8 are traveling in opposite directions, in order to determine whether or not the main rope 13 has been cut off while traveling, the output pulse signals of the encoders 22 and 32 are changed. In response, the safety controller 50 obtains the ratio of the moving speed of the car 1 and the moving speed of the counterweight 8, and the moving speed ratio is set as an error of the speed ratio generated by the extension of the main rope 13 during movement. It is determined whether it is within the specified range.

  If the moving speed ratio is within the error range, the process proceeds to step 103. If not, the process proceeds to step 119, where the safety controller 50 determines that the main rope 13 has been disconnected, proceeds to step 121, and sends an abnormal signal to the shut-off circuit 6, the hoisting machine brake 3, and the emergency stop device 25. , 35 to activate them.

  In step 103, the safety controller 50 determines that the moving speed of the car 1 is the rated speed in response to the change of the pulse signal from the encoder 22 with respect to the car 1 and the counterweight 8 that are traveling in opposite directions. It is determined whether it is less than a predetermined multiple (1.3 times). If the moving speed of the car 1 is less than a predetermined multiple of the rated speed, the process proceeds to step 104, where the safety controller 50 determines that both the car 1 and the counterweight 8 are in normal operation and returns to step 101. During this time, the controller 40 continues the elevator operation.

  When the moving speed of the car 1 is not less than a predetermined multiple of the rated speed, the process moves to step 118, and the safety controller 50 outputs an abnormal signal assuming that the elevator is in an overspeed state. Then, the safety controller 50 operates the shut-off circuit 6 and the hoisting machine brake 3 by the abnormal signal, and then proceeds to Step 122.

  In step 122, even after the safety controller 50 operates the hoisting machine brake 3 and the breaking circuit 6 (step 118) after the moving speed of the car exceeds the rated speed, the moving speed of the car 1 increases. Subsequently, it is determined whether the second predetermined multiple (1.4 times) of the rated speed has been reached. If it is determined that the car 1 has reached the second predetermined multiple of the rated speed, the process proceeds to step 123, and the emergency stop devices 25 and 35 are operated to emergency stop the car 25 and the counterweight 8. When the car 1 and the counterweight 8 are stopped, the elevator is stopped as an emergency measure.

  In step 105, based on the signals output from the encoders 22 and 32, the safety controller 50 determines that the traveling direction of the car 1 and the traveling direction of the counterweight 8 are not opposite to each other and the traveling direction of the car 1 is If it is determined that the vehicle is in the upward direction, that is, if the car 1 is traveling upward and the counterweight 8 is stopped or traveling upward, the process proceeds to step 106; otherwise, the process proceeds to step 111.

  In step 106, when the safety controller 50 detects that the traveling direction of the counterweight 8 is upward, i.e., both the car 1 and the counterweight 8 are traveling upward, the safety controller 50 proceeds to step 109. The main rope 13 is determined to have only contracted without a problem in terms of safe operation of the elevator, and the process returns to step 101. If it is determined that the car 1 is in the upward direction and the counterweight 8 is stopped, the routine proceeds to step 107.

  In step 107, when the car 1 is upward and the counterweight 8 is stopped, the safety controller 50 sets the travel distance of the car 1 as the contraction of the main rope 13 based on the pulse signal from the encoder 22. It is determined whether or not it is within a set range (about several tens of centimeters: 10 ms or less) from the viewpoint of safety.

  On the other hand, if the safety controller 50 determines in step 107 that the travel distance of the car 1 exceeds the range (about several tens of centimeters) set as the contraction of the main rope 13, the safety controller 50 proceeds to step 120, and the car 1 moves up. It is determined that the main rope 13 is tangled while traveling in the direction, and the process proceeds to step 121.

  In step 108, in a state where the car 1 is upward, the counterweight 8 is stopped, and the moving distance of the car 1 is within a range (about several tens of centimeters) set as the contraction of the main rope 13. When the safety controller 50 determines whether the car 1 is closed, and determines that the car 1 is not closed, the safety controller 50 detects that the passenger in the car 1 has left the car 1. It is determined that the main rope 13 has contracted as a result of the recoil due to lightening (step 109), and then the process returns to step 101. This contraction is determined to be free from the entanglement of the main rope and have no trouble in the operation of the elevator.

  When the car 1 is closed, the process proceeds to step 120, and the safety controller 50 determines that the main rope has contracted, that is, the main rope has been entangled despite the absence of passengers getting on and off the car. Determination is made (step 120), and the process proceeds to step 121.

  In step 111, when the safety controller 50 detects that the traveling direction of the car 1 is downward, that is, the traveling direction of the car 1 is downward and the counterweight 8 is stopped or its traveling direction is downward. If the direction is the direction, the process proceeds to step 112. On the other hand, if it is determined that the car 1 is stopped, the process proceeds to step 114.

  In step 112, in the state where the traveling direction of the car 1 is downward and the counterweight 8 is stopped or the traveling direction is downward, the safety controller 50 determines that the travel distance of the car 1 is the main rope 13. It is determined whether it is within the range (about several tens of centimeters) set as the elongation of. If it is determined that the moving distance of the car 1 is within the range (about several tens of centimeters) set as the extension of the main rope 13, the process proceeds to step 113, and the safety controller 50 increases the extension that does not hinder the safety of the main rope 13. It is determined that it has only occurred, and the process returns to step 101.

  On the other hand, when the safety controller 50 determines that the movement distance of the counterweight 8 exceeds the range (about several tens of centimeters) set as the extension of the main rope 13, the safety controller 50 proceeds to step 119 and the safety controller 50 causes the main rope 13 to move. It is determined that is disconnected, and the process proceeds to step 121.

  In step 114, when the car 1 is stopped, if the safety controller 50 determines that the traveling direction of the counterweight 8 is upward, the safety controller 50 moves to step 107, and determines whether the main rope is contracted or entangled. . In step 107, the moving distance is determined. If the distance is within the set range (several tens of centimeters), the process proceeds to step 108. If not within the set range (several tens of centimeters), the process proceeds to step 120. Judged as entangled. When the car 1 is moving downward or upward, the main rope 13 is entangled, and when the car 1 stops, it is determined that the counterweight 8 has jumped up, an abnormal signal is output, and the routine proceeds to step 121.

  If the safety controller 50 determines that the car 1 is stopped, the counterweight 8 is stopped, or the traveling direction thereof is the downward direction, the safety controller 50 proceeds from step 114 to step 115 and the traveling direction of the counterweight 8 is decreased. It is determined whether the direction is or is stopped.

  If it is determined that the counterweight 8 is traveling downward while the car 1 is stopped, the process moves from step 115 to step 116. When both the car 1 and the counterweight 8 are stopped, the safety controller 50 proceeds from step 115 to step 117, and after determining that the elevator is stopped, returns to step 101.

  In step 116, when the car 1 is stopped and the counterweight 8 is moving downward, the safety controller 50 determines that the movement distance of the counterweight 8 is within the range set as the extension of the main rope 13 (several To determine whether it is about 10 cm). If it is determined that the movement distance is within the range (about several tens of centimeters) set as the extension of the main rope 13, the process proceeds to step 113, and the safety controller 50 determines that only the normal extension of the main rope 13 has occurred. . When the safety controller detects the normal elongation of the main rope 13, the maintenance company can use the detection result for the maintenance plan of the main rope.

  If the safety controller 50 determines that the moving distance of the counterweight 8 exceeds the range (about several tens of centimeters) set as the extension of the main rope 13, the safety controller 50 proceeds to step 119 and determines that the main rope 13 has been cut. To step 121.

  In step 121, the safety controller 50 outputs an abnormal signal to the cutoff circuit 6 and the hoisting machine brake 3 to operate them. As a result, by operating the gripping device 28 of the car and the gripping device 38 of the counterweight, the emergency stop devices 25 and 35 are operated, and the elevator is brought into a resting state.

  In the above-described embodiment, the safety controller 50 cuts the main rope when the traveling speed and the moving distance of the car 1 and the counterweight 8 exceed the set range set for the expansion and contraction of the main rope, or Because the entanglement occurred, the car and the counterweight were stopped, but the setting range was configured from multiple stages, and the main rope could be cut or entangled due to the possibility of entanglement. You may set the prevention state which decelerates or stops normally.

  In the above-described embodiment, the machine room-less elevator in which the hoisting machine is installed on the pit side of the hoistway is taken as an example, but there is a machine room-less elevator in which the hoisting machine is attached to the rooftop, or a machine room Of course, the present invention can also be applied to an elevator.

DESCRIPTION OF SYMBOLS 1 Riding car 2 Hoisting machine 3 Hoisting machine brake 5 Inverter 6 Breaking circuit 7 AC power supply 8 Balance weight 11, 12 Final limit switch 13 Main rope 21,31 Governor 22,32 Encoder 23,33 Governer gripping device 24,34 Governor rope 25, 35 Emergency stop device 26, 36 Guide rail 27, 37 Shock absorber 28 Car cage grip device 38 Balance weight grip device 40 Control controller 50 Safety controller 60 Control panel 70 Specific distance sensing device 71, 72, 73 Shield plate 80 Car operation panel 81, 82, 83 Landing button 90 Car door switch 91, 92, 93 Landing door switch

Claims (14)

An elevator operation management system comprising a controller for controlling the safe operation of a car,
The controller is
An input circuit to which a first detection signal obtained from an operation state of the car and a second detection signal obtained from an operation state of a counterweight with respect to the car are input;
Based on the first detection signal and the second detection signal, the operation status of the car and the counterweight is calculated, and the setting set according to the operation status and the state of the main rope A control circuit for comparing the value and forming an actuation signal for the braking device for braking the car based on the comparison result;
An output circuit for outputting the operation signal to the braking device;
Comprising
Elevator operation management system. The controller is
The first detection signal is obtained from a first encoder provided in a first governor corresponding to the car, and the second detection signal is provided in a second governor corresponding to the counterweight. Obtained from the second encoder,
Based on the first detection signal and the second detection signal, at least one of the traveling direction, the moving speed, and the moving distance is calculated as the operation status for each of the car and the counterweight. The elevator operation management system according to claim 1. The controller is
Compare the calculated operation status and the set value set corresponding to the growth of the main measure,
When it is determined that the calculated operation status is within the set value range, the main measure is not disconnected, and the operation of the car is continued.
3. When it is determined that the calculated operation status is not within the set value range, it is determined that the main measure has been disconnected, and the operation signal for emergency stopping the car is formed. The elevator operation management system described. The controller compares the calculated operation status and the set value set corresponding to the contraction of the main measure,
If it is determined that the calculated operation status is within the range of the set value, it is assumed that there is no entanglement in the main measure, and the operation of the car is continued.
If it is determined that the calculated operation status is not within the range of the set value, it is determined that the main measure is entangled, and the operation signal for emergency stopping the car is formed. The elevator operation management system according to 2. The controller is
Based on the calculated operation status, the traveling directions of the car and the counterweight are opposite to each other, and the ratio of the moving speed of the car and the moving speed of the counterweight is the extension of the main measure. When it is determined that the traveling speed of the car is less than a predetermined multiple of the rated speed within the set value range set for the car,
The elevator operation management system according to claim 3, wherein the operation of the car is continued without causing the car to perform an emergency stop, assuming that the car is in a normal operation state. The controller is
Based on the calculated operation status, the traveling directions of the car and the counterweight are opposite to each other, and the ratio of the moving speed of the car and the moving speed of the counterweight is the extension of the main measure. If it is determined that it is not within the set value range set for the
The elevator operation management system according to claim 3, wherein the operation signal for emergency stopping the car is formed when the main rope is cut. The controller is
The set value in which the car travels upward, the counterweight is stopped, and the moving distance of the car is set with respect to the contraction of the main policy based on the calculated operation status And determining that the car door is not closed,
The elevator operation management system according to claim 4, wherein the operation of the car is continued without emergency stopping the car, assuming that the main rope is not entangled. The controller is
The set value in which the car travels upward, the counterweight is stopped, and the moving distance of the car is set with respect to the contraction of the main policy based on the calculated operation status If it is determined that it is not within the range of
The elevator operation management system according to claim 4, wherein the operation signal for emergency stopping the car is formed on the assumption that the main rope has the entanglement. The controller is
The set value in which the car travels upward, the counterweight is stopped, and the moving distance of the car is set with respect to the contraction of the main policy based on the calculated operation status And determining that the car door is closed,
The elevator operation management system according to claim 4, wherein the operation signal for emergency stopping the car is formed on the assumption that the main rope has the entanglement. The controller is
Based on the calculated operation status, the car is moving downward, the counterweight is moving downward or is stopped, and the moving distance of the car is due to the looseness of the main policy. If determined to be within the range of the set value set for
The elevator operation management system according to claim 3, wherein the main rope is not in a disconnected state, and the operation of the car is continued without emergency stopping the car. The controller is
Based on the calculated operation status, the car is moving downward, the counterweight is moving downward or is stopped, and the moving distance of the car is due to the looseness of the main policy. If it is determined that it is not within the set value range set for the
The elevator operation management system according to claim 3, wherein the operation signal for emergency stopping the car is formed when the main rope is cut. The controller is
When it is determined that the car is stopped and the counterweight is moving upward based on the calculated operation status,
The elevator operation management system according to claim 2, wherein when the main rope is entangled, the operation signal for emergency stopping the car is formed. The controller is
When it is determined that the car is stopped based on the calculated operation status, the counterweight progresses downward, and the movement distance of the counterweight is within the set value range,
The elevator operation management system according to claim 3, wherein the operation of the car is continued assuming that the main measure is not disconnected. Based on the calculated operation status, the car is stopped, the counterweight proceeds downward, and it is determined that the moving distance of the counterweight is not within the set value range.
The elevator operation management system according to claim 3, wherein the operation signal for emergency stopping the car is formed when the main measure is disconnected.

Images