JPWO2006106574A1 - Elevator equipment - Google Patents

Abstract

In the elevator apparatus, the sensor generates a detection signal for detecting the state of the elevator. The electronic safety controller detects an abnormality of the elevator based on a detection signal from the sensor, and outputs a command signal for shifting the elevator to a safe state. Transmission of at least a part of the detection signal from the sensor and the command signal from the electronic safety controller is performed by wireless communication.

Description

  The present invention relates to an elevator apparatus using an electronic safety controller that detects an abnormality of an elevator based on a detection signal from a sensor.

  In a conventional elevator safety system, sensors and the like are connected to bus nodes provided in hoistways, machine rooms, and cars, and information from the sensors and the like is sent to the safety controller via the bus nodes and the communication network bus (for example, , See Patent Document 1).

Japanese translation of PCT publication No. 2002-538061

  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. In addition, it is necessary to secure a space for wiring in the hoistway, which increases the hoistway area.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain an elevator apparatus capable of reducing labor during installation and reducing hoistway space. To do.

  An elevator apparatus according to the present invention includes a sensor that generates a detection signal for detecting an elevator state, and a command signal for detecting an abnormality of the elevator based on the detection signal from the sensor and causing the elevator to transition to a safe state. The at least part of the detection signal and the command signal is transmitted by wireless communication.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a graph which shows the pattern of the overspeed set in the ETS circuit part of the governor and electronic safety controller of FIG. It is a block diagram which shows the apparatus structure of the principal part of the electronic safety controller of FIG. It is explanatory drawing which shows the execution method of the 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.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 1. The car 3 is raised and lowered in the hoistway 1 while being guided by the car guide rail. The counterweight 4 is moved up and down in the hoistway 1 while being guided by the counterweight guide rail.

  At the lower part of the car 3, an emergency stop device 5 that is engaged with the car guide rail and stops the car 3 in an emergency is mounted. 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.

  In the lower part of the hoistway 1, a driving device (hoisting machine) 7 for raising and lowering 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. is doing.

  For example, an electromagnetic brake device is used as the brake unit 10. In the 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 shoe is released from the braking surface by exciting the electromagnetic magnet. Is released.

  The elevator control part 12 is arrange | positioned at the lower part etc. in the hoistway 1, for example. The elevator control unit 12 is provided with an operation control unit that controls the operation of the drive 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 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.

  When the relay circuit of the safety circuit unit is opened, the energization to the motor unit of the drive device 7 is interrupted, the energization to the electromagnetic magnet of the brake unit 10 is interrupted, and the drive sheave 8 is braked.

  A speed governor (mechanical speed governor) 14 is installed above 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. A lower end portion of the governor rope 16 is wound around a tension wheel 17 disposed at a lower portion of the hoistway 1.

  When the car 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 car 3. The governor 14 mechanically detects that the traveling speed of the car 3 has reached an overspeed. As the overspeed to be detected, a first overspeed (OS speed) higher than the rated speed and a second overspeed (Trip speed) higher than the first overspeed are set.

  When the traveling speed of the car 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 of the safety circuit unit of the elevator control unit 12 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 performs a braking operation.

  The governor encoder 15 generates a detection signal corresponding to the rotation of the governor sheave. Further, 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 ETS circuit unit of a terminal floor forced reduction device (ETS device) provided in the electronic safety controller 21. The ETS circuit unit detects an abnormality of the elevator based on the detection signal from the governor encoder 15 and outputs a command signal for shifting the elevator to a safe state. Specifically, the ETS circuit unit obtains the traveling speed and position of the car 3 independently of the elevator control unit 12 by a signal from the governor encoder 15, and the traveling speed of the car 3 near the terminal floor. Monitors whether the ETS monitoring overspeed has been reached.

  Further, the ETS circuit unit 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. When it is determined by the ETS circuit unit that the traveling speed of the car 3 has reached the ETS monitoring overspeed, the relay circuit of the safety circuit unit is opened.

  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 in the ETS circuit unit itself or the governor encoder 15 is detected, the nearest floor stop command signal as a command signal for shifting the elevator to a safe state is output from the ETS circuit unit to the operation control unit. The Further, bidirectional communication is possible between the ETS circuit unit and the operation control unit.

  First and second reference position sensors 23 and 24 for detecting that the car 3 is located at a reference position in the hoistway 1 are provided at predetermined positions in the hoistway 1. As the reference position sensors 23 and 24, upper and lower terminal floor switches can be used. Detection signals from the reference position sensors 23 and 24 are input to the ETS circuit unit 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 surface of the car 3 and the counterweight 4, a car shock absorber 27 and a counterweight shock absorber 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 below the car 3, and alleviates 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 alleviates 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.

  A pair of car suspension wheels 41 a and 41 b 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. In the upper part of the hoistway 1, car-side return wheels 43 a and 43 b and a counterweight-side 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.

  In addition, the main rope 6 is, in order from the first end portion 6a side, car suspension vehicles 41a and 41b, car side return wheels 43a and 43b, drive sheave 8, a counterweight side return wheel 44, and a counterweight suspension vehicle 42. It is wrapped around That is, in this example, the car 3 and the counterweight 4 are suspended in the hoistway 1 by a 2: 1 roping method.

  Here, the motor encoder 11, the elevator controller 12, the governor encoder 15, the electronic safety controller 21, and the reference position sensors 23 and 24 are communication units for performing signal transmission by wireless communication (for example, wireless LAN communication). (Antenna unit) is provided. 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, an emergency stop command from the electronic safety controller 21 to the safety circuit unit of the elevator control unit 12 is transmitted through the communication cable (solid arrow in FIG. 1). Although not shown, an emergency stop command from the speed governor 14 to the safety circuit unit 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.

  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 speed governor 14 and the electronic safety controller 21 of FIG. In the figure, when the car 3 travels at a normal speed (rated speed) from the lower terminal floor to the upper terminal floor, the speed pattern of the car 3 is a normal speed pattern V0. First and second overspeed patterns V1 and V2 are set in the governor 14 by mechanical position adjustment. An ETS monitoring overspeed pattern VE is set in the ETS circuit unit.

  The ETS monitoring overspeed pattern VE is set higher than the normal speed pattern V0. Further, the ETS monitoring overspeed pattern VE is set so as to be substantially equidistant from the normal speed pattern V0 in the entire ascending / descending stroke. That is, the ETS monitoring overspeed pattern VE changes according to the car position. More specifically, the ETS monitoring overspeed pattern VE is set to be constant in the vicinity of the intermediate floor, but continuously and smoothly near the terminal floor (upper and lower ends) of the hoistway 1 near the terminal floor. Is set to be low. As described above, the ETS circuit unit 22 monitors the traveling speed of the car 3 not only near the terminal floor but also near the intermediate floor (a constant speed traveling section in the normal speed pattern V0). It is not necessary to monitor.

  The first overspeed pattern V1 is set higher than the ETS monitoring overspeed pattern VE. Further, the second overspeed pattern V2 is set to be higher than the first overspeed pattern V1. The first and second overspeed patterns V1, 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. And a second microprocessor 32 for executing the above arithmetic processing.

  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 results of the arithmetic processing. That is, the soundness of the microprocessors 31 and 32 is confirmed by executing the same processing in the first and second microprocessors 31 and 32 and comparing the processing results via the 2-port RAM 33 and the like.

  Further, the microprocessors 31 and 32 can detect abnormality of the electronic safety controller 21 other than abnormality of the microprocessors 31 and 32 itself by the 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 arithmetic processing according to a program stored in the ROM at a predetermined arithmetic cycle (for example, 50 msec) based on a signal from the fixed cycle timer. The programs executed in one cycle include a safety program for detecting an abnormality of the elevator and a failure / abnormality check program for detecting a failure / abnormality of the electronic safety controller 21 or various sensors. The failure / abnormality check program may be executed only when a preset condition is satisfied.

  The failure / abnormality check program executes, 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.

  In such an elevator apparatus, the electronic safety controller 21 can detect an abnormality of the electronic safety controller 21 itself, and even when an abnormality of the electronic safety controller 21 itself is detected, a command for shifting the elevator to a safe state Since the signal is output, the reliability of the safety system can be improved with a relatively simple configuration while increasing the detection speed of the elevator abnormality and the processing speed for the abnormality.

  In addition, the electronic safety controller 21 can detect abnormalities of various sensors and outputs a command signal for shifting the elevator to a safe state even when the abnormalities of the sensors are detected. Can be further improved.

  Furthermore, the electronic safety controller 21 includes first and second microprocessors 31 and 32, and the first and second microprocessors 31 and 32 compare the results of the arithmetic processing with each other to compare the first and second microprocessors 31 and 32. Since the soundness of the microprocessors 31 and 32 themselves can be confirmed, the reliability of the safety system can be further improved.

  Furthermore, in this elevator apparatus, the detection signal from the sensor (here, the governor encoder 15 and the reference position sensors 23 and 24) for detecting the state of the elevator, and the electronic for moving the elevator to a safe state Transmission of at least a part of the command signal from the safety controller 21 is performed by wireless communication. For this reason, it is not necessary to arrange a large number of communication cables in the hoistway in a complicated manner, so that labor during installation can be reduced and the hoistway space can be reduced. 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 complicated, it is effective to wirelessly transmit signals related to the electronic safety controller 21.

  Moreover, in this elevator apparatus, transmission of the detection signal from the motor encoder 11 and the signal between the elevator control part 12 and the electronic safety controller 21 is also performed by wireless communication. Therefore, it is possible to further reduce the labor during installation and further reduce the hoistway space.

  Furthermore, since the electronic safety controller 21 transmits the command signal for stopping the car 3 to the nearest floor by wireless communication and the command signal for stopping the car 3 by wire communication, the electronic safety controller 21 has higher reliability. Sex can be secured.

In the above example, only one elevator apparatus is described. However, signals from sensors of a plurality of elevator apparatuses in the same building may be managed by a common electronic safety controller. In addition, by transmitting the detection signal and the command signal by wireless communication, the same effect as in the above example can be obtained.
In the above example, the speed governor encoder 15 and the reference position sensors 23 and 24 are shown as sensors that transmit a detection signal to the electronic safety controller 21, but the sensors 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, it is not necessary to wirelessly transmit all command signals from the electronic safety controller, and conversely, all command signals including an emergency stop command may be transmitted wirelessly.

Embodiment 2. FIG.
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 cars 3 a and 3 b are provided. The first and second cars 3a and 3b are arranged so as to overlap vertically, and are raised and lowered independently in the common hoistway 1 respectively. That is, this elevator apparatus is a one-shaft multi-car type elevator. Accordingly, the first car 3a is raised and lowered by a first driving device (not shown), and the second car 3b is raised and lowered by a second driving device (not shown). Moreover, illustration of the main rope etc. which suspend the 1st and 2nd cage | baskets 3a and 3b is abbreviate | omitted.

  Communication for transmitting signals (call registration request signal, call registration confirmation signal, etc.) to and from the elevator controller 12 (FIG. 1) by wireless communication with the first and second cars 3a and 3b. Each part (antenna part) is provided. Other configurations are the same as those in the first embodiment.

  In such an elevator apparatus, not only the signal transmission related to the electronic safety controller 21 (FIG. 1) but also the signal transmission between the cars 3a, 3b and the elevator control unit 12 is performed by wireless communication, so that the trouble of installation is reduced. While being able to reduce, 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 as not to interfere with each other, the layout is difficult, and the hoistway space is large. According to the form 2, the hoistway space can be reduced.

In the second embodiment, the one-shaft multi-car type elevator is shown. However, in the elevator apparatus according to the first embodiment, a communication unit is provided in the car 3, and signal transmission between the car 3 and the elevator control unit 12 is performed. You may make it perform by radio | wireless communication.
In the above example, the emergency stop command from the electronic safety controller is input to the safety circuit unit of the elevator control unit. However, the safety circuit for the electronic safety controller is separate from the safety circuit unit of the elevator control unit. The emergency stop command from the electronic safety controller may be input to the safety circuit unit for the electronic safety controller.

Claims (7)

A sensor that generates a detection signal for detecting the state of the elevator, and an electronic safety controller that detects an abnormality of the elevator based on the detection signal from the sensor and outputs a command signal for shifting the elevator to a safe state With
An elevator apparatus in which transmission of at least a part of the detection signal and the command signal is performed by wireless communication. An elevator control unit for controlling the operation of the car;
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.   2. The elevator apparatus according to claim 1, wherein the electronic safety controller transmits a command signal for stopping the car to the nearest floor by wireless communication, and transmits a command signal for emergency stopping the car by wired communication. .   The electronic safety controller is capable of detecting an abnormality of the electronic safety controller itself, and outputs a command signal for shifting the elevator to a safe state even when the abnormality of the electronic safety controller itself is detected. The elevator apparatus according to 1.   The elevator apparatus 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. The electronic safety controller is configured to detect a malfunction of an elevator based on a first microprocessor that executes a calculation process for detecting a malfunction of the elevator based on a first safety program, and a second safety program. A second microprocessor that executes arithmetic processing;
The first and second microprocessors can communicate with each other via an inter-processor bus, and the soundness of the first and second microprocessors themselves can be improved by comparing the results of arithmetic processing of each other. The elevator apparatus according to claim 1, which can be confirmed. An elevator control unit for controlling the operation of the car;
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.

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