KR100874304B1 - Elevator device - Google Patents

Abstract

In an elevator apparatus, a sensor generates a detection signal for detecting an elevator state. The electronic safety controller 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. The transmission of at least a part of a signal of the detection signal from the sensor and the command signal from the electronic safety controller is performed by wireless communication.

Description

Elevator device {ELEVATOR APPARATUS}

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, a sensor or the like is connected to a bus node installed in a hoistway, a machine room and a car, and information from the sensor is sent to a safety controller via a bus node and a communication network bus (eg, See, for example, Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 2002-538061

In the conventional elevator apparatus similar to the above, it is necessary to wire many communication cables in a hoistway, and the installation takes considerable trouble. In addition, it is necessary to secure a space for wiring in the hoistway, and the hoistway area becomes large.

This invention is made | formed in order to solve the same subject as the above, and an object of this invention is to obtain the elevator apparatus which can reduce the effort | work at the time of installation and can reduce the space of a hoistway.

The elevator apparatus according to the present invention is a sensor for generating a detection signal for detecting an elevator state, and an electronic device for detecting an abnormality of the elevator based on a detection signal from the sensor and outputting a command signal for shifting the elevator to a safe state. A safety controller is provided, and transmission of at least a part of signals of the detection signal and the command signal is performed by wireless communication.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the elevator apparatus by Embodiment 1 of this invention.

FIG. 2 is a graph showing a pattern of overspeed set in the ETS circuit portion of the governor and the electronic safety controller of FIG. 1. FIG.

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

4 is an explanatory diagram showing a method of executing arithmetic processing by the microprocessor of FIG. 3;

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

EMBODIMENT OF THE INVENTION Hereinafter, very suitable embodiment of this invention is described with reference to drawings.

 Embodiment 1.

 BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. In the figure, a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are provided in the hoistway 1. The elevator car 3 is guided to the car guide rail so that the inside of the hoistway 1 is elevated. The counterweight 4 is guided by the counterweight guide rail, and the inside of the hoistway 1 is elevated.

In the lower part of the cage | basket | car 3, the emergency stop device 5 which engages with the cage | basket | car guide rail and emergency-stops the cage | basket | car 3 is mounted. The emergency stop device 5 has a pair of braking pieces which are operated by mechanical operation to force the car guide rail.

In the lower part of the hoistway 1, the drive device (winder) 7 which raises and lowers the cage | basket | car 3 and the counterweight 4 through the main rope 6 is provided. The drive device 7 includes a drive sheave 8, a motor part 9 for rotating the drive sheave 8, a brake part 10 for braking the rotation of the drive sheave 8, and a drive sheave ( It has the motor encoder 11 which generate | occur | produces the detection signal according to the rotation of 8).

As the brake part 10, the electromagnetic brake apparatus is used, for example. 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 simultaneously excite the electromagnetic magnet so that the brake shoe is removed from the braking surface. The brake is released by opening.

The elevator control part 12 is arrange | positioned at the lower part etc. in the hoistway 1, for example. The elevator control part 12 is provided with the operation control part which controls the operation of the drive device 7, and the safety circuit part (relay circuit part) for stopping the car 3 suddenly at the time of abnormality of an elevator. The detection signal from the motor encoder 11 is input to the operation control unit. The driving controller controls the drive device 7 by obtaining the position and speed of the car 3 based on the detection signal from the motor encoder 11.

When the relay circuit of the safety circuit portion is in the open state, the energization of the drive unit 7 to the motor unit is cut off, the energization of the brake unit 10 to the electromagnetic magnet is cut off, and the driving sheave 8 Is braked.

The governor (mechanical governor) 14 is provided in the upper part of the hoistway 1. The governor 14 is provided with a governor sheave, an overspeed detection switch, a rope catch, a governor encoder 15 as a sensor, and the like. The governor rope 16 is wound around the governor sheave. Both ends of the governor rope 16 are connected to the operation mechanism of the emergency stop device 5. The lower end of the governor rope 16 is wound around a tightening pulley 17 arranged below the hoistway 1.

When the car 3 is elevated, the governor rope 16 is circulated and the governor sheave is rotated at a rotational speed corresponding to the running speed of the car 3. In the governor 14, it is mechanically detected that the traveling speed of the car 3 has reached an overspeed. As the overspeed 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 cage | basket | car 3 reaches the 1st 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 portion of the elevator control unit 12 is opened. When the running 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 according to the rotation of the governor sheave. As the governor encoder 15, a dual sense type encoder for simultaneously outputting two types of 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 the ETS circuit portion of the end layer forced deceleration 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 the signal from the governor encoder 15 and travels of the car 3 near the end floor. Monitor whether the speed has reached the ETS monitoring overspeed.

In addition, 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 running speed of the car 3 has reached the ETS monitoring overspeed. If 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.

In addition, the ETS circuit portion can detect an abnormality of the ETS circuit portion itself and an abnormality of the governor encoder 15. When an abnormality of the ETS circuit section itself or the governor encoder 15 is detected, the closest floor stop command signal as a command signal for shifting the elevator to a safe state is output from the ETS circuit section to the operation control section. In addition, the communication between the ETS circuit unit and the operation control unit can be performed in both directions.

At predetermined positions in the hoistway 1, first and second reference position sensors 23 and 24 for detecting that the car 3 is located at the reference position in the hoistway 1 are provided. Upper and lower termination layer switches can be used as the reference position sensors 23 and 24. The detection signal from the reference position sensors 23 and 24 is input to the ETS circuit part of the electronic safety controller 21. The ETS circuit section corrects the information of the position of the car 3 obtained in the ETS circuit section based on the detection signals from the reference position sensors 23 and 24.

A car buffer 27 and a counterweight buffer 28 are provided between the bottom face of the hoistway 1 and the bottom face of the car 3 and the counterweight 4. Here, the car buffer 27 and the counterweight buffer 28 are provided in the lower part of the hoistway 1. As shown in FIG. The car buffer 27 is disposed just 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 just below the counterweight 4, and alleviates the impact when the counterweight 4 collides with the bottom of the hoistway 1. As the buffers 27 and 28, for example, an inflow or spring buffer is used.

The lower part of the cage | basket | car 3 is provided with a pair of cage | suspending pulleys 41a and 41b. A counterweight suspending pulley 42 is provided at the upper portion of the counterweight 4. The car side return pulleys 43a and 43b and the balance estimation return pulley 44 are disposed above the hoistway 1. The main rope 6 has the 1st and 2nd edge part 6a, 6b connected to the upper part of the hoistway 1 via the hard part.

In addition, the main rope 6 has a top suspension pulley 41a, 41b, a cage side pulley 43a, 43b, a drive sheave 8, and a balance at the top of the first end 6a side. It is wound around the guess return pulley 44 and the counterweight suspension pulley 42. That is, in this example, the car 3 and the counterweight 4 are suspended in the hoistway 1 in a 2: 1 roping manner.

Here, the motor encoder 11, the elevator control unit 12, the governor encoder 15, the electronic safety controller 21, and the reference position sensors 23, 24 transmit a signal wirelessly (for example, wireless LAN communication). Communication units (antenna units) for carrying out are provided respectively. The broken-line arrow of FIG. 1 shows the communication by radio.

Specifically, the detection signal of the motor encoder 11 is transmitted to the elevator control unit 12 by wireless communication. The transmission of information between the electronic safety controller 21 and the elevator control unit 12 is performed by wireless communication. In addition, the closest floor stop instruction 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 portion of the elevator control unit 12 is transmitted via the communication cable (solid line arrow in Fig. 1). Although not shown, an emergency stop command from the governor 14 to the safety circuit portion is also transmitted via the communication cable. The detection signal of 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 multiple communication.

In addition, the operation mode of the electronic safety controller 21 includes a plurality of modes such as a normal driving mode, a maintenance driving mode, and an emergency driving 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 a pattern of overspeed set in the ETS circuit portion of the governor 14 and the electronic safety controller 21 of FIG. 1. In the figure, when the car 3 runs at a normal speed (rated speed) from the lower terminal layer to the upper terminal layer, the speed pattern of the car 3 becomes the normal speed pattern V0. The governor 14 is set with first and second overspeed patterns V1 and V2 by mechanical position adjustment. The ETS monitoring overspeed pattern VE is set in the ETS circuit section.

The ETS monitoring overspeed pattern VE is usually set higher than the speed pattern V0. In addition, the ETS monitoring overspeed pattern VE is normally set to be substantially equally spaced in the whole lifting stroke with respect to the speed pattern V0. That is, the ETS monitoring overspeed pattern VE is changing according to the car position. More specifically, the ETS monitoring overspeed pattern VE is set to be constant near the middle floor, but near the end layer, the ETS monitoring overspeed pattern VE is set to be continuously and smoothly lower as it approaches the ends (upper and lower) of the hoistway 1. Thus, although the ETS circuit part 22 monitors the traveling speed of the cage | basket | car 3 not only in the vicinity of a terminal floor, but also in the vicinity of an intermediate | middle floor (normal speed traveling section in normal speed pattern V0), it is always required about the intermediate | middle floor vicinity. No need to watch

The first overspeed pattern V1 is set higher than the ETS monitoring overspeed pattern VE. In addition, the second overspeed pattern V2 is set higher than the first overspeed pattern V1. Further, the first and second overspeed patterns V1 and V2 are constant at all heights in the hoistway 1.

3 is a block diagram showing an apparatus 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 which performs arithmetic processing for detecting an abnormality of the elevator based on the first safety program, and the second safety program. The second microprocessor 32 which performs arithmetic processing for this is included.

The first safety program is a program having the same contents as the second safety program. The first and second microprocessors 31 and 32 are capable of communicating with each other via an interprocessor bus and a two-port RAM 33. In addition, the first and second microprocessors 31 and 32 can confirm the health of the first and second microprocessors 31 and 32 themselves by comparing the results of the arithmetic processing with each other. In other words, the same processing is executed on the first and second microprocessors 31 and 32, and the communication results are compared through the two-port RAL 433 or the like, whereby the integrity of the microprocessors 31 and 32 is confirmed. .

The microprocessors 31 and 32 can also detect abnormalities of the electronic safety controller 21 other than the abnormalities of the microprocessors 31 and 32 by arithmetic processing.

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 at predetermined arithmetic cycles (for example, 50 msec) based on a signal from a fixed period timer, in accordance with a program stored in R0M. The program executed in one cycle includes a safety program for detecting an abnormality in an elevator and a fault / abnormal check program for detecting a fault or an abnormality of the electronic safety controller 21 itself or various sensors. The fault / error check program may be executed only when a preset condition is satisfied.

In the fault / error check program, for example, a clock abnormality detection, an abnormality detection of a stack area of RAM, an abnormality detection of arithmetic processing procedures, an abnormality detection of a relay contact, an abnormality detection of a power supply voltage, and the like are executed.

In the same elevator apparatus, even when the electronic safety controller 21 detects an abnormality of the electronic safety controller 21 itself and detects an abnormality of the electronic safety controller 21 itself, it is necessary to transfer the elevator to a safe state. Since the command 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 or the processing speed for the abnormality.

In addition, the electronic safety controller 21 can also detect abnormalities of various sensors, and even when a sensor abnormality is detected, it outputs a command signal for shifting the elevator to a safe state, thereby further improving the reliability of the safety system. Can be.

In addition, 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, Since the health of the first and second microprocessors 31 and 32 itself can be confirmed, the reliability of the safety system can be further improved.

In addition, in this elevator apparatus, the sensor for detecting an elevator state (here, the detection signal from the governor encoder 15 or the reference position sensors 23 and 24, and the electronic safety controller 21 for shifting an elevator to a safe state) The transmission of at least a part of the signal of the command signal is performed by wireless communication, which eliminates the necessity of arranging a large number of communication cables in the hoistway, thereby reducing the effort at the time of installation, and In particular, in an electronic safety monitoring system having a large number or type of signals to be transmitted and having a complicated transmission path, it is effective to wirelessize the signal transmission with respect to the electronic safety controller 21.

Moreover, in this elevator apparatus, the 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, the effort at the time of installation can be further reduced, and the hoistway space can be further reduced.

In addition, the electronic safety controller 21 transmits the command signal for stopping the car 3 to the nearest floor by wireless communication, and wires the transmission of the command signal for emergency stopping the car 3. Since communication is performed, higher reliability can be ensured.

In the above example, only one elevator device is described, but signals from sensors of a plurality of elevator devices in the same building may be managed by a common electronic safety controller. In this case, detection signals and command signals are also used. By performing the wireless communication, the same effect as in the above example can be obtained.

In addition, although the governor encoder 15 and the reference position sensors 23 and 24 were shown as a sensor which transmits a detection signal to the electronic safety controller 21 in the above example, a sensor is 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 performed by wireless communication.

In addition, it is not necessary to make the transmission of the detection signals from all the sensors wireless, but only some of the sensors may be selected and made wireless.

In addition, it is not necessary to make the transmission of all the command signals from the electronic safety controller wireless, and conversely, the transmission of all the command signals including the emergency stop command may be made wireless.

Embodiment 2.

Next, FIG. 5 is a schematic block diagram which shows the elevator apparatus by Embodiment 2 of this invention. In the hoistway 1, the 1st and 2nd cage | basket | cars 3a and 3b are provided. The 1st and 2nd cage | basket | cars 3a and 3b are arrange | positioned so that it may overlap with the top and bottom, and are each independently lifted up and down inside the common hoistway. That is, this elevator apparatus is a one-shaft multi-car type elevator. Therefore, the 1st cage | basket | car 3a is lifted by the 1st drive device (not shown), and the 2nd cage | basket | car 3b is lifted and lifted by the 2nd drive device (not shown). In addition, illustration of the main rope etc. which hangs the 1st and 2nd cage | basket | car 3a, 3b is abbreviate | omitted.

The first and second cars 3a and 3b are used for wirelessly transmitting signals (call registration request signals, call registration confirmation signals, etc.) to and from the elevator control unit 12 (FIG. 1). Communication units (antenna units) are provided respectively. The other configuration is the same as that in the first embodiment.

In the same 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 and 3b and the elevator control unit 12 are performed by wireless communication. This can reduce the labor of the and at the same time reduce the space of the hoistway. That is, in the conventional one-shaft multi-car type elevator, it is necessary to connect two communication cables to two cars so as not to interfere with each other, the layers are difficult, and the space of the hoistway has increased, but according to the second embodiment, the hoistway space is reduced. can do.

In addition, although the one-shaft multi-car type elevator was shown in Embodiment 2, in the elevator apparatus of Embodiment 1, the communication part is provided in the cage | basket | car 3, and the cage | basket | car 3 is connected with the elevator control part 12. 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 portion of the elevator control portion. However, a safety circuit portion for the electronic safety controller is provided separately from the safety circuit portion of the elevator control portion. The emergency stop command may be input to the safety circuit unit for the electronic safety controller.

According to this invention, the elevator apparatus using the electronic safety controller which detects the abnormality of an elevator based on the detection signal from a sensor can be provided.

Claims (8)

A plurality of sensors generating a detection signal for detecting an elevator state; An elevator control unit which receives a detection signal from the sensor and controls the operation of the car based on the input detection signal; And An electronic safety controller for inputting a detection signal from the sensor, detecting an abnormality of the elevator based on the input detection signal, and outputting a command signal for shifting the elevator to a safe state; The elevator apparatus, characterized in that the transmission of the signal of at least a portion of the detection signal and the command signal is performed by wireless communication. The method of claim 1, The sensor, the electronic safety controller and the elevator control unit is provided with a communication unit for performing a signal transmission between each other, the elevator apparatus, characterized in that each. The method of claim 1, The electronic safety controller performs a command signal transmission for stopping the car on the nearest floor by wireless communication, and transmits a command signal for emergency stopping the car by wire communication. Elevator device. The method of claim 1, The electronic safety controller can detect an abnormality of the electronic safety controller itself, and output an instruction signal for shifting the elevator to a safe state even when an abnormality of the electronic safety controller itself is detected. . The method of claim 1, The electronic safety controller can detect an abnormality of the sensor, and output an instruction signal for shifting the elevator to a safe state even when the abnormality of the sensor is detected. The method of claim 1, The electronic safety controller includes a first microprocessor that executes arithmetic processing for detecting an abnormality of an elevator based on a first safety program, and arithmetic processing for detecting an abnormality of an elevator based on a second safety program. A second microprocessor to execute, The first and second microprocessors are capable of communicating with each other via a bus between processors, and by comparing the results of arithmetic processing with each other, it is possible to confirm the health of the first and second microprocessors themselves. Elevator device characterized by the above. The method of claim 1, An elevator apparatus characterized in that transmission of a signal between the car and the elevator control unit is also performed by wireless communication. The method of claim 1, The elevator control unit and the electronic safety controller obtain the traveling speed of the car independently from each other on the basis of detection signals inputted to each elevator device.

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