WO2006106574A1

WO2006106574A1 - Elevator apparatus

Info

Publication number: WO2006106574A1
Application number: PCT/JP2005/006289
Authority: WO
Inventors: Kenichi Okamoto; Tatsuo Matsuoka; Takeharu Kondo
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-03-31
Filing date: 2005-03-31
Publication date: 2006-10-12
Also published as: EP1864934A1; EP1864934B1; CN100595123C; JPWO2006106574A1; KR20070088314A; EP1864934A4; CN1953925A; KR100874304B1

Abstract

In an elevator apparatus, a sensor generates a detection signal for detecting a condition of the elevator. An electronic safety controller detects an abnormality of the elevator based on the detection signal from the sensor and outputs a command signal for placing the elevator in a safe condition. Transmission of at least a part of the detection signal from the sensor and of the command signal from the electronic safety controller is performed by radio communication.

Description

Elevator equipment

Technical field

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. Background art

[0002] In a conventional elevator safety system, sensors and the like are connected to bus nodes provided in hoistways, machine rooms, and cars, and information on the sensor force is transmitted to a safety controller via a bus node and a communication network bus. Sent (for example, see Patent Document 1).

[0003] Patent Document 1: Japanese Translation of Special Publication 2002-538061

Disclosure of the invention

Problems to be solved by the invention

[0004] In the conventional elevator apparatus as described above, it is necessary to wire many communication cables in the hoistway, which requires a considerable amount of time for installation. Moreover, it is necessary to secure a space for wiring in the hoistway, which increases the hoistway area.

[0005] The present invention has been made to solve the above-described problems, and is an elevator capable of reducing the time required for installation and reducing the hoistway space. The object is to obtain a device.

Means for solving the problem

[0006] An elevator apparatus according to the present invention detects an abnormality of an elevator based on a sensor that generates a detection signal for detecting the state of the elevator and a detection signal of the sensor force, and shifts the elevator to a safe state. And an electronic safety controller that outputs a command signal for transmitting the detection signal, and at least a part of the detection signal and the command signal is transmitted by wireless communication.

Brief Description of Drawings

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.

[Fig. 2] Overload set in ETS circuit section of governor and electronic safety controller in Fig. 1. It is a graph which shows the pattern of speed.

3 is a block diagram showing a device configuration of a main part of the electronic safety controller of FIG. 1.

FIG. 4 is an explanatory diagram showing a method of executing arithmetic processing by the microprocessor of FIG.

FIG. 5 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 2 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, 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.

At the bottom of the car 3, 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 operated by a mechanical operation and pressed against the car guide rail.

At the lower part of the hoistway 1, a driving device (lifting machine) 7 that raises and lowers the car 3 and the counterweight 4 via the main rope 6 is installed. 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. have.

[0011] As the brake unit 10, for example, an electromagnetic brake device is used. In an electromagnetic brake device, 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 the brake magnet is separated from the braking surface force by exciting the electromagnetic magnet. And braking is released.

[0012] The elevator control unit 12 is disposed, for example, in a lower part in the hoistway 1 or the like. The elevator control unit 12 is provided with an operation control unit for controlling the operation of the driving device 7 and a safety circuit unit (relay circuit unit) for suddenly stopping the car 3 when the elevator is abnormal. . A detection signal from the motor encoder 11 is input to the operation control unit. The operation control unit Based on the detection signal from the data encoder 11, the position and speed of the car 3 are obtained, and the driving device 7 is controlled.

[0013] When the relay circuit of the safety circuit section is opened, the energization to the motor section of the drive device 7 is cut off, and the energization to the electromagnetic magnet of the brake section 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.

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. As 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.

[0016] 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 relay circuit in the safety circuit section of the elevator control section 12 is opened. When the traveling speed of the force 3 reaches the second overspeed, the governor rope 16 catches the governor rope 16 and the circulation of the governor rope 16 is stopped. When circulation of the governor rope 16 is stopped, the emergency stop device 5 performs a braking operation.

The governor encoder 15 generates a detection signal corresponding to the rotation of the governor sheave. As the governor encoder 15, a dual sense type encoder that simultaneously outputs two detection signals, that is, the first and second detection signals, is used.

[0018] The first and second detection signals from the governor encoder 15 are input to an ETS circuit section of a terminal floor forced reduction device (ETS device) provided in the electronic safety controller 21. The ETS circuit section detects elevator abnormalities based on detection signals from the governor encoder 15. Then, a command signal for shifting the elevator to a safe state is output. In particular,

The ETS circuit section obtains the traveling speed and position of the car 3 independently of the elevator control section 12 based on the signal from the governor encoder 15, and the traveling speed of the car 3 near the terminal floor is determined as ET. Monitors whether the S monitoring overspeed is reached.

[0019] Further, the ETS circuit unit converts the signal from the governor encoder 15 into a digital signal and performs digital arithmetic 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 circuit section that the traveling speed of the car 3 has reached the ETS monitoring overspeed, the relay circuit of the safety circuit section is opened.

[0020] Further, the ETS circuit unit can detect an abnormality of the ETS circuit unit itself and an abnormality of the governor encoder 15. When an abnormality is detected in the ETS circuit section itself or the governor encoder 15, the nearest floor stop command signal is output to the ETS circuit section force operation control section as a command signal for shifting the elevator to a safe state. The Furthermore, bidirectional communication is possible between the ETS circuit section and the operation control section.

[0021] 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 ETS circuit section of the electronic safety controller 21. The ETS circuit unit corrects the position information of the car 3 obtained in the ETS circuit unit based on the detection signals from the reference position sensors 23 and 24.

Between the bottom surface of the hoistway 1 and the lower surfaces of the car 3 and the counterweight 4, a force buffer 27 and a counterweight buffer 28 are installed. Here, the car buffer 27 and the counterweight buffer 28 are installed in the lower part of the hoistway 1. The car shock absorber 27 is disposed directly under the force 3 to reduce the impact when the car 3 collides with the bottom of the hoistway 1. The counterweight buffer 28 is disposed directly below the counterweight 4 and reduces the impact when the counterweight 4 collides with the bottom of the hoistway 1. As these shock absorbers 27 and 28, for example, oil-filled or spring-type buffers are used.

[0023] A pair of car suspension wheels 41a and 41b are provided at the lower part of the car 3. On the upper part of the counterweight 4, a counterweight suspension wheel 42 is provided. At the top of hoistway 1, turn the car side Cars 43a and 43b and counterweight return wheel 44 are arranged. 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.

[0024] In addition, 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.

Here, the motor encoder 11, elevator control unit 12, governor encoder 15, electronic safety controller 21, and reference position sensors 23 and 24 perform signal transmission by wireless communication (for example, wireless LAN communication). A communication part (antenna part) is provided for each! The dashed arrows in Fig. 1 indicate wireless communication.

Specifically, the detection signal of the motor encoder 11 is transmitted to the elevator control unit 12 by wireless communication. Transmission of information between the electronic safety controller 21 and the elevator control unit 12 is performed by wireless communication. The nearest floor stop command from the electronic safety controller 21 to the elevator control unit 12 is transmitted by wireless communication. However, the emergency stop command from the electronic safety controller 21 to the safety circuit section of the elevator control section 12 is transmitted through the communication cable (solid arrow in Fig. 1). Although not shown, an emergency stop command from the governor 14 to the safety circuit is also transmitted through the communication cable. The detection signal from the governor encoder 15 and the detection signals from the reference position sensors 23 and 24 are transmitted to the electronic safety controller 21 by wireless communication.

[0027] In this example, one signal is transmitted using a plurality of different carrier frequencies.

That is, reliability is improved by using multiplex communication.

Furthermore, the operation mode of the electronic safety controller 21 includes a plurality of modes such as a normal operation mode, a maintenance operation mode, and an emergency operation mode. The mode information of the electronic safety controller 21 is transmitted to the elevator control unit 12 by wireless communication.

FIG. 2 is a graph showing an overspeed pattern set in the ETS circuit section of the governor 14 and the electronic safety controller 21 in FIG. In the figure, when the force 3 travels at the normal speed (rated speed) to the upper terminal floor, the speed pattern of the car 3 is The speed pattern is VO. The governor 14 is set with first and second overspeed patterns VI and V2 by mechanical position adjustment. The ETS monitoring overspeed pattern VE is set in the ETS circuit.

[0030] The ETS monitoring overspeed pattern VE is set higher than the normal speed pattern VO.

In addition, 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 circuit section 22 monitors the traveling speed of the force 3 even in the vicinity of the intermediate floor (a constant speed traveling section in the normal speed pattern VO) that is not only in the vicinity of the terminal floor, but in the vicinity of the intermediate floor. Therefore, it is not always necessary to monitor.

[0031] 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 constant at all heights in the hoistway 1.

FIG. 3 is a block diagram showing a device configuration of a main part of the electronic safety controller 21 of FIG.

The electronic safety controller 21 detects the abnormality of the elevator based on the first microprocessor 31 that executes arithmetic processing for detecting the abnormality of the elevator based on the first safety program and the second safety program. Including a second microphone port processor 32 for executing arithmetic processing to perform!

[0033] The first safety program is a program having the same content as the second safety program. The first and second microprocessors 31 and 32 can communicate with each other via an interprocessor bus and a two-port RAM 33. Further, the first and second microprocessors 31 and 32 can confirm the soundness of the first and second microprocessors 31 and 32 themselves by comparing the calculation processing results of each other. In other words, the soundness of the microprocessors 31 and 32 is confirmed by having the first and second microprocessors 31 and 32 execute the same processing and comparing the processing results via the 2-port RAM 33 and the like. . In addition, the microprocessors 31 and 32 can detect abnormalities in the electronic safety controller 21 other than those in the microprocessors 31 and 32 themselves by arithmetic processing.

FIG. 4 is an explanatory diagram showing a method of executing arithmetic processing by the microprocessors 31 and 32 of FIG. The microprocessors 31 and 32 repeatedly execute the arithmetic processing according to the program stored in the ROM at a predetermined arithmetic cycle (for example, 50 msec) based on the signal from the fixed-cycle timer. Programs executed within one cycle include a safety program for detecting elevator abnormalities and a fault / abnormality check program for detecting faults / abnormalities in the electronic safety controller 21 itself and various sensors. It is. In addition, the failure / abnormality check program may be executed only when preset conditions are satisfied.

In the 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 executed.

[0037] In such an elevator apparatus, the electronic safety controller 21 can detect an abnormality of the electronic safety controller 21 itself, and when the abnormality of the electronic safety controller 21 itself is detected, the elevator is shifted to a safe state. Therefore, it is possible to improve the reliability of the safety system with a relatively simple configuration while increasing the detection speed of the elevator abnormality and the processing speed for the abnormality.

[0038] Further, the electronic safety controller 21 can also detect abnormality of various sensors, and outputs a command signal for shifting the elevator to a safe state even when the abnormality of the sensor is detected. The reliability can be further improved.

[0039] Furthermore, the electronic safety controller 21 includes first and second microprocessors 31, 32, and the first and second microprocessors 31, 32 compare the first and second processing results with each other. Since the soundness of the second microprocessor 31, 32 itself can be confirmed, the reliability of the safety system can be further improved.

[0040] Furthermore, in this elevator apparatus, a sensor for detecting the state of the elevator (here, the governor encoder 15 and the reference position sensors 23 and 24), the detection signal of the force, and the elevator are shifted to a safe state. At least a part of the command signal from the electronic safety controller 21 is transmitted by wireless communication. For this reason, many communications This eliminates the need for complicated arrangement of cables in the hoistway, and reduces the time and effort required for installation. In particular, in an electronic safety monitoring system in which the number and types of signals to be transmitted are large and the transmission paths are complex, the wireless transmission of the signal transmission related to the electronic safety controller 21 is effective.

In this elevator apparatus, transmission of detection signals from the motor encoder 11 and signals between the elevator control unit 12 and the electronic safety controller 21 are also performed by wireless communication. Therefore, it is possible to further reduce the time and effort during installation and further reduce the hoistway space.

[0042] Further, the electronic safety controller 21 transmits a command signal for stopping the force 3 to the nearest floor by wireless communication, and transmits a command signal for emergency stop of the force 3 by wire communication. Therefore, higher reliability can be ensured.

[0043] Although only one elevator apparatus has been described in the above example, signals from sensors of a plurality of elevator apparatuses in the same building may be managed by a common electronic safety controller. In this case, the same effect as the above example can be obtained by transmitting the detection signal and the command signal by wireless communication.

Further, in the above example, the force sensors showing the governor encoder 15 and the reference position sensors 23 and 24 as sensors that transmit the detection signal to the electronic safety controller 21 are not limited to these. For example, transmission of detection signals from various sensors such as a temperature sensor, a speed sensor, an acceleration sensor, and a vibration sensor can be wireless communication.

Furthermore, it is not necessary to wirelessly transmit detection signals from all sensors, and only some sensors may be selected and wirelessly transmitted.

Furthermore, the transmission of all command signals including an emergency stop command may be performed wirelessly, instead of the need to wirelessly transmit all command signals of the electronic safety controller power.

[0044] Embodiment 2.

Next, FIG. 5 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the hoistway 1, first and second force bars 3a, 3b are provided. The first and second cars 3a, 3b are arranged so as to overlap each other, and are raised and lowered independently in the common hoistway 1 respectively. That is, this elevator device is a one-shaft multi-car type engine. It is a beta. Accordingly, the first car 3a is raised and lowered by the first driving device (not shown), and the second car 3b is raised and lowered by the second driving device (not shown). Also, the illustration of the main ropes etc. for suspending the first and second cars 3a, 3b is omitted.

[0045] The first and second cars 3a and 3b transmit signals (call registration request signal, call registration confirmation signal, etc.) to and from the elevator controller 12 (Fig. 1) by wireless communication. A communication section (antenna section) is provided for this purpose. Other configurations are the same as those in the first embodiment.

[0046] In such an elevator apparatus, signal transmission between the baskets 3a, 3b and the elevator control unit 12 is performed not only by signal transmission related to the electronic safety controller 21 (Fig. 1), but also at the time of installation. In addition to reducing labor, the hoistway space can be reduced. That is, in the conventional one-shaft multi-car type elevator, it is necessary to connect the two communication cables to the two cars so that they do not interfere with each other, and the hoistway space that is difficult to layout increases. However, according to the second embodiment, the hoistway space can be reduced.

[0047] In the second embodiment, in the elevator apparatus of the first embodiment showing a one-shaft multi-car type elevator, a communication unit is provided in the force 3 and the force 3 and the elevator control unit 12 are connected. Signal transmission may be performed by wireless communication.

In the above example, the emergency stop command from the electronic safety controller is input to the safety circuit section of the elevator control section. However, the safety circuit section for the electronic safety controller is separate from the safety circuit section of the elevator control section. A circuit unit may be provided, and an emergency stop command from the electronic safety controller may be input to the safety circuit unit for the electronic safety controller.

Claims

The scope of the claims

[1] a sensor that generates a detection signal for detecting the state of the elevator, and

An electronic safety controller that detects an abnormality in the elevator and outputs a command signal to shift the elevator to a safe state based on the detection signal of the sensor force

With

An elevator apparatus in which transmission of at least part of the detection signal and the command signal is performed by wireless communication.

[2] It further includes an elevator control unit that controls the operation of the force,

The elevator apparatus according to claim 1, wherein the sensor, the electronic safety controller, and the elevator control unit are each provided with a communication unit for transmitting signals between each other by wireless communication.

[3] The electronic safety controller transmits a command signal for stopping the force to the nearest floor by wireless communication, and transmits a command signal for emergency stop of the force by wire communication. Item 1. The elevator apparatus according to item 1.

[4] The electronic safety controller can detect an abnormality of the electronic safety controller itself, and outputs a command signal for shifting the elevator to a safe state even when an abnormality of the electronic safety controller itself is detected. The elevator apparatus according to claim 1.

5. The electronic safety controller according to claim 1, wherein the electronic safety controller is capable of detecting an abnormality of the sensor, and outputs a command signal for shifting the elevator to a safe state even when the abnormality of the sensor is detected. Elevator device.

[6] The electronic safety controller includes a first microprocessor that executes arithmetic processing for detecting an abnormality in the elevator based on the first safety program, and an elevator abnormality based on the second safety program. And a second microprocessor that executes arithmetic processing for detection,

The first and second microprocessors can communicate with each other via inter-processor nodes, and the results of the first and second microprocessors themselves can be determined by comparing each other's computation results. 2. The elevator apparatus according to claim 1, wherein it is possible to confirm the performance. An elevator control unit that controls the operation of the force,

The elevator apparatus according to claim 1, wherein transmission of signals between the car and the elevator control unit is also performed by wireless communication.