Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B1/00—Control systems of elevators in general
  • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
  • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
  • B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
  • B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B1/00—Control systems of elevators in general
  • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
  • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
  • B66B1/285—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical with the use of a speed pattern generator
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B1/00—Control systems of elevators in general
  • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
  • B66B1/3415—Control system configuration and the data transmission or communication within the control system
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/0006—Monitoring devices or performance analysers
  • B66B5/0018—Devices monitoring the operating condition of the elevator system
  • B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons

Definitions

• the present invention relates to an elevator apparatus using an electronic safety controller that detects an abnormality of an elevator based on a sensor force detection signal.
• Patent Document 1 Special Table 2002— 538061
• the present invention has been made to solve the above-described problems, and can detect a state in which the electronic safety controller is substantially lost, thereby improving reliability.
• An object of the present invention is to obtain an elevator apparatus that can perform the above.
• An elevator apparatus detects an abnormality in an elevator based on a detection signal from an elevator control unit that controls the operation of the car and a sensor that detects the state of the elevator, thereby bringing the elevator into a safe state.
• Electronic safety that outputs command signals for transition Equipped with all controllers, the elevator control unit can communicate with the electronic safety controller, and can check the communication status with the electronic safety controller at a predetermined timing.
• FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.
• FIG. 2 is a graph showing a pattern of overspeed set in the ETS device of the governor and electronic safety controller of FIG.
• FIG. 3 is a block diagram showing the main part of FIG. 1.
• FIG. 4 is an explanatory diagram showing a method of executing arithmetic processing by the second and third CPUs in FIG. 3.
• FIG. 5 is an explanatory diagram showing a method of executing arithmetic processing by the first CPU in FIG. 3.
• FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.
• a pair of force guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 1.
• the force 3 is moved up and down in the hoistway 1 by being guided by the force guide rail.
• the counterweight 4 is moved up and down in the hoistway 1 by being guided by the counterweight guide rail.
• an emergency stop device 5 is mounted for engaging the force guide rail and stopping the car 3 in an emergency.
• the emergency stop device 5 has a pair of braking pieces that are pressed against the car guide rail by a braking operation by a mechanical operation.
• the drive device 7 includes a drive sheave 8, a motor unit 9 that rotates the drive sheave 8, a brake unit 10 that brakes the rotation of the drive sheave 8, and a motor encoder 11 that generates a detection signal according to the rotation of the drive sheave 8.
• an electromagnetic brake device is used as the brake unit 10.
• the brake shoe is pressed against the braking surface by the spring force of the braking spring to brake the rotation of the drive sheave 8 and to excite the electromagnetic magnet.
• One kick is released and the braking is released.
• an elevator control unit (control panel) 12 is disposed in the lower part of the hoistway 1 or the like.
• the elevator control unit 12 is provided with an operation control unit that controls the operation of the drive device 7.
• a detection signal from the motor encoder 11 is input to the operation control unit.
• the operation control unit obtains the position and speed of the car 3 based on the detection signal from the motor encoder 11 and controls the driving device 7.
• the elevator control unit 12 has a function of detecting the abnormal speed of the cage 3 by comparing the obtained car speed with the operation command value.
• a safety circuit (relay circuit) 30 for suddenly stopping the car 3 when the elevator is abnormal is connected to the elevator control unit 12.
• the safety circuit 13 is opened, the energization to the motor unit 9 of the drive device 7 is cut off, the energization to the electromagnetic magnet of the brake unit 10 is cut off, and the drive sheave 8 is braked.
• a speed governor (mechanical speed governor) 14 is installed in the upper part of the hoistway 1.
• the governor 14 is provided with a governor sheave, an overspeed detection switch, a rope catch, and a governor encoder 15 as a sensor.
• a governor rope 16 is wound around the governor sheave. Both ends of the governor rope 16 are connected to the operation mechanism of the safety device 5. The lower end of the governor rope 16 is hung on a tension wheel 17 disposed at the lower part of the hoistway 1.
• the speed governor rope 16 When the force 3 is raised and lowered, the speed governor rope 16 is circulated, and the speed governor sheave is rotated at a rotational speed corresponding to the traveling speed of the force 3.
• the governor 14 mechanically detects that the traveling speed of the car 3 has reached an overspeed.
• the overspeed to be detected the first overspeed (OS speed) higher than the rated speed, the higher over the first overspeed !, and the second overspeed (Trip speed) are set.
• the overspeed detection switch of the governor 14 When the traveling speed of the force 3 reaches the first overspeed, the overspeed detection switch of the governor 14 is operated. When the overspeed detection switch is operated, the safety circuit 13 is opened. When the traveling speed of the car 3 reaches the second overspeed, the governor rope 16 is gripped by the rope catch of the governor 14, and the circulation of the governor rope 16 is stopped. When the circulation of the governor rope 16 is stopped, the emergency stop device 5 is braked.
• the governor encoder 15 generates a detection signal corresponding to the rotation of the governor sheave. Also as the governor encoder 15, a dual-sense type encoder that simultaneously outputs two detection signals, that is, first and second detection signals, is used.
• the first and second detection signals from the governor encoder 15 are input to an electronic safety controller (safety control board) 21.
• the electronic safety controller 21 detects an abnormality of the elevator based on a signal from a sensor such as the governor encoder 15 and outputs a command signal for shifting the elevator to a safe state.
• the electronic safety controller 21 has a function as, for example, a terminal floor forced reduction device (ETS device).
• ETS device obtains the traveling speed and position of the car 3 independently of the elevator control unit 12 based on the signal from the governor encoder 15, and the traveling speed of the car 3 near the terminal floor is overestimated by ETS. Monitor whether the speed is reached.
• the ETS device converts the signal from the governor encoder 15 into a digital signal and performs digital calculation processing to determine whether the traveling speed of the car 3 has reached the ETS monitoring overspeed. Judging. When it is determined by the ETS device that the traveling speed of the car 3 has reached the ETS monitoring overspeed, the safety circuit 13 is opened.
• the electronic safety controller 21 can detect an abnormality in the electronic safety controller 21 itself and an abnormality in the governor encoder 15. When an abnormality is detected in the electronic safety controller 21 itself or the governor encoder 15, the nearest floor stop command signal is sent from the electronic safety controller 21 to the elevator controller as a command signal for shifting the elevator to a safe state. Output to 12 operation control units. Further, bidirectional communication is possible between the electronic safety controller 21 and the operation control unit.
• First and second reference position sensors 23 and 24 are provided at predetermined positions in the hoistway 1 for detecting that the force 3 is located at the reference position in the hoistway 1. ing. As the reference position sensors 23 and 24, upper and lower terminal switches can be used. Detection signals from the reference position sensors 23 and 24 are input to the electronic safety controller 21. Based on the detection signals from the reference position sensors 23 and 24, the electronic safety controller 21 corrects the position information of the car 3 obtained in the ETS device.
• a car shock absorber 27 and a counterweight shock absorber 28 are installed in the lower part of the hoistway 1.
• the car buffer 27 and the counterweight buffer 28 are the car 3 and the counterweight 4 are the bottom of the hoistway 1 Mitigates impact when colliding with parts.
• shock absorbers 27, 28, for example, oil-filled or spring-type buffers are used! /
• a pair of car suspension wheels 41a and 41b are provided at the lower part of the car 3.
• a counterweight suspension wheel 42 is provided on the upper part of the counterweight 4.
• the car side return wheels 43 a and 43 b and the counterweight side return wheel 44 are arranged in the upper part of the hoistway 1.
• the main rope 6 has first and second end portions 6a and 6b connected to the upper portion of the hoistway 1 via a rope stop portion.
• the main rope 6 has the first end 6a side force in the order of the car suspension wheels 41a, 41b, the car side return wheels 43a, 43b, the driving sheave 8, the counterweight side return wheel 44, and the counterweight. It is wrapped around a suspension car 42. That is, in this example, the force 3 and the counterweight 4 are suspended in the hoistway 1 by the 2: 1 roving method.
• FIG. 2 is a graph showing an overspeed pattern set in the ETS device of the governor 14 and the electronic safety controller 21 of FIG.
• the speed pattern of the car 3 is the normal speed pattern VO.
• first and second overspeed patterns VI and V2 are set by mechanical position adjustment.
• the ETS monitoring overspeed pattern V E is set for the ETS device.
• the ETS monitoring overspeed pattern VE is set higher than the normal speed pattern VO.
• the ETS monitoring overspeed pattern VE is set so as to be approximately equidistant from the normal speed pattern VO in the entire lifting process. That is, the ETS monitoring overspeed pattern VE changes according to your position. More specifically, the ETS monitoring overspeed pattern VE is set to be constant near the intermediate floor, but continuously and smoothly as it approaches the terminal end (upper and lower ends) of the hoistway 1 near the terminal floor. It is set to be low. In this way, the ETS device 22 monitors the traveling speed of the force 3 even in the vicinity of the intermediate floor (the constant speed traveling section in the normal speed pattern VO) just near the terminal floor, but it is close to the intermediate floor. Don't necessarily monitor it.
• the first overspeed pattern VI is set higher than the ETS monitoring overspeed pattern VE. Also, the second overspeed pattern V2 is set higher than the first overspeed pattern VI.
• the first and second overspeed patterns VI and V2 are all heights in hoistway 1. It is constant at.
• FIG. 3 is a block diagram showing the main part of FIG.
• the elevator control unit 12 has a first computer having a first CPU (arithmetic processing unit) 31, a storage unit (ROM, RAM, hard disk, etc.) and a signal input / output unit.
• the function of the elevator control unit 12 is realized by the first computer. That is, a control program for realizing the function of the elevator control unit 12 is stored in the storage unit of the first computer.
• the first CPU 31 executes arithmetic processing related to the function of the elevator control unit 12 based on the control program.
• the elevator control unit 12 is provided with a motor drive unit 32 (such as an inverter) for driving the motor unit 9. Further, the elevator control unit 12 is provided with a first safety relay 33 for opening the safety circuit 13. When an emergency stop command is output from the first CPU 31 to the first safety relay 33, the safety circuit 13 is opened. When the safety circuit 13 is opened, the contactor 34 for the motor is opened, the power supply to the motor unit 9 is cut off, and the contactor 35 for the brake is opened to supply power to the electromagnetic magnet of the brake unit 10. Blocked.
• a motor drive unit 32 such as an inverter
• the electronic safety controller 21 includes a second computer having second and third CPUs (arithmetic processing units) 36 and 37, a storage unit (ROM, RAM, node disk, etc.) and a signal input / output unit. Have.
• the function of the electronic safety controller 21 is realized by the second computer. That is, a safety program for realizing the function of the electronic safety controller 21 is stored in the storage unit of the second computer.
• the second and third CPUs 36 and 37 execute arithmetic processing related to the function of the electronic safety controller 21 based on the safety program.
• the electronic safety controller 21 is provided with second and third safety relays 38 and 39 for opening the safety circuit 13.
• the second and third CPUs 36 and 37 correspond to the second and third safety relays 38 and 39 on a 1: 1 basis.
• an emergency stop command force deceleration command
• the safety circuit 13 is opened.
• the safety program includes first and second safety programs having the same contents.
• the second CPU 36 executes arithmetic processing based on the first safety program.
• 3rd CPU 37 executes arithmetic processing based on the second safety program.
• the second and third CPUs 36 and 37 can communicate with each other via an interprocessor bus and a two-port RAM. Further, the second and third CPUs 36 and 37 can confirm the soundness of the second and third CPUs 36 and 37 themselves by comparing the results of the arithmetic processing. That is, the soundness of the CPUs 36 and 37 is confirmed by causing the second and third CPUs 36 and 37 to execute the same processing and comparing the processing results by communication.
• the electronic safety controller 21 can detect an abnormality of the electronic safety controller 21 other than the abnormality of the CPUs 36 and 37 itself by a calculation process.
• FIG. 4 is an explanatory diagram showing a method of executing arithmetic processing by the second and third CPUs 36 and 37 of FIG.
• the second and third CPUs 36 and 37 repeatedly execute arithmetic processing in accordance with a program stored in the ROM at a predetermined arithmetic cycle (for example, 50 msec) based on a signal from a fixed-cycle timer in the second computer.
• a predetermined arithmetic cycle for example, 50 msec
• the program executed within one cycle includes a safety program for detecting an abnormality in the elevator, a failure 'abnormality check program for detecting a failure / abnormality of the electronic safety controller 21 itself and various sensors, and so on. Is included.
• the fault / abnormality check program may be executed only when preset conditions are met.
• failure / abnormality check program for example, clock abnormality detection, RAM stack area abnormality detection, arithmetic processing order abnormality detection, relay contact abnormality detection, power supply voltage abnormality detection, and the like are sequentially executed.
• FIG. 5 is an explanatory diagram showing a method of executing arithmetic processing by the first CPU 31 in FIG.
• the first CPU 31 repeatedly executes arithmetic processing according to a program stored in the ROM at a predetermined arithmetic cycle based on a signal from a fixed-cycle timer in the first computer.
• the program executed in one cycle includes a control program for controlling the operation of the elevator and a communication check program for confirming the communication state with the electronic safety controller 21.
• the communication check program can be executed only when preset conditions are satisfied.
• the elevator control unit 12 performs communication for checking the communication state with respect to the electronic safety controller 21 at a predetermined cycle. The response from the electronic safety controller 21 is correct. If it does not always return (when a communication error is detected), the elevator controller 12 will safely stop the car 3 if the power 3 is running (the nearest floor stop command), and if the power 3 is stopped Normally, automatic operation is not possible. If normal automatic operation is disabled, at least one of manual operation and low-speed automatic operation may be permitted.
• the elevator controller 12 When a communication error is detected, the elevator controller 12 outputs an abnormality detection signal to the elevator management room or the like. That is, when a communication error is detected, the elevator controller 12 generates a signal for reporting an abnormality to the elevator manager.
• the elevator control unit 12 can communicate with the electronic safety controller 21 and can check the communication state with the electronic safety controller 21 at a predetermined timing.
• the state where the electronic safety controller 21 is substantially lost can be detected, and the reliability can be improved.
• the elevator control unit 12 disables the normal automatic operation of the force 3, so that the electronic safety controller 21 is practically absent. You can prevent 3 from being driven by passengers. In addition, even when normal automatic operation is disabled, at least one of manual operation and low-speed automatic operation is permitted, so that the car 3 cannot be completely powered when replacing the substrate for maintenance. Absent.
• the communication status confirmation signal from the elevator control unit 12 is repeatedly output, if the response from the electronic safety controller 21 does not return to normal even once, a communication error is determined. Also good. Also, in order to prevent erroneous detection of communication errors, it may be determined that a communication error has occurred if the response from the electronic safety controller 21 does not return to normal continuously for a preset number of times. ,.
• information such as the force speed obtained by the elevator control unit 12 may be included in the communication status confirmation signal.
• the electronic safety controller 21 receives the information obtained by the electronic safety controller 21 and the elevator. The information obtained by the control unit 12 may be compared, and if a match cannot be obtained, no response may be made (normal operation is not permitted). This prevents the car 3 from being operated with the wrong electronic safety controller 21 installed.
• At least one of the elevator controller 12 and the electronic safety controller 21 may also monitor the movement of the car 3 with the sensor information force after the brake is activated each time the car stops. That is, a function may be provided for checking whether the car 3 is properly held stationary after the brake is actuated. As a result, it is possible to check whether the required deceleration torque is secured by the brake unit 10 or not.
• the timing of the deceleration torque checking operation is not limited for each car stop. For example, when the car 3 stops on a predetermined floor, when the car 3 stops for a preset number of times, the car 3 stops for the first time within a preset period (for example, 1 day, 1 hour or 10 minutes). It may be executed when the force 3 stops.
• a detection switch that is mechanically operated by removing the board of the electronic safety controller 21 is provided, and the elevator control unit 12 periodically checks the open / close state of the detection switch so that the electronic safety controller 21 is substantially Try to make sure that it is not lost.
• the communication between the elevator control unit 12 and the electronic safety controller 21 may be performed by wired communication via a communication cable or by wireless communication such as a wireless LAN.

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• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Computer Networks & Wireless Communication (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)
• Indicating And Signalling Devices For Elevators (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (1)

Family

ID=37073143

Family Applications (1)

Country Status (5)

Cited By (13)

Families Citing this family (17)

Citations (4)

Family Cites Families (2)

• 2005
  • 2005-03-31 CN CN2005800154032A patent/CN1953926B/zh active Active
  • 2005-03-31 EP EP05727358.3A patent/EP1864935B1/de not_active Expired - Fee Related
  • 2005-03-31 JP JP2007512379A patent/JPWO2006106575A1/ja active Pending
  • 2005-03-31 WO PCT/JP2005/006292 patent/WO2006106575A1/ja not_active Application Discontinuation
  • 2005-03-31 KR KR1020097007617A patent/KR101014917B1/ko active IP Right Grant

Patent Citations (4)

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