KR20080110689A - Elevator apparatus - Google Patents

Abstract

In an elevator apparatus, an elevator control section controls operation of an elevator car. Further, an electronic safety controller detects an abnormality of the elevator and outputs a command signal for placing the elevator in a safe condition. The elevator control section is adapted to be able to communicate with the electronic safety controller and to be able to confirm a condition of communication with the electronic safety controller at a predetermined timing. ® KIPO & WIPO 2009

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 apparatus, an independent CPU is provided in each of the elevator controller and the electronic safety controller. In addition, in order to improve the reliability of the communication between the elevator control device and the electronic safety controller, the communication system has a double redundant configuration. And when a communication error is detected by the electronic safety controller, operation of an elevator is prohibited (for example, refer patent document 1).

Patent Document 1: Special Publication 2002-538061

However, in the conventional elevator apparatus, since only the electronic safety controller checks the communication error, when the board of the electronic safety controller is detached for maintenance, for example, all the electronic safety controllers function. If the electronic safety controller is substantially absent, such as when there is no electronic safety controller, or when an electronic safety controller that does not conform to the specification is connected, there is a possibility that the car can be operated without safety monitoring by the electronic safety controller.

This invention is made | formed in order to solve the above subjects, and an object of this invention is to obtain the elevator apparatus which can detect the state where an electronic safety controller is substantially absent, and can improve reliability.

An elevator apparatus according to the present invention detects an abnormality of an elevator based on a detection signal from an elevator control unit for controlling the operation of a car and a sensor for detecting an elevator state, and provides a command signal for shifting the elevator to a safe state. The electronic safety controller which outputs is provided, The elevator control part is able to communicate with an electronic safety controller, and it is possible to confirm the communication state with an electronic safety controller at a predetermined timing.

The present invention provides an elevator apparatus capable of detecting a state in which the electronic safety controller is substantially absent, thereby improving reliability.

EMBODIMENT OF THE INVENTION Hereinafter, preferred 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 drawing, a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are provided in the hoistway 1. The car 3 is guided to the car guide rail and moves up and down the hoistway 1. The counterweight 4 is guided by the counterweight guide rail and moves up and down inside the hoistway 1.

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 makes the cage | basket | car 3 emergency stop is mounted. The emergency stop device 5 has a pair of braking pieces that are braked by mechanical operation and pushed onto the car guide rail.

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

As the brake part 10, the electromagnetic brake apparatus is used, for example. In the electromagnetic brake device, the brake shoe is pushed to the braking surface by the spring force of the brake spring, the rotation of the driving sheave 8 is braked, and the brake shoe is removed by exciting the electromagnetic magnet. It is opened from the hibernating surface, and braking is released.

For example, the elevator control part (control panel) 12 is arrange | positioned in the lower part etc. in the hoistway 1 and the like. The elevator control part 12 is provided with the operation control part which controls the operation of the drive apparatus 7. The 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 drive device 7. Moreover, the elevator control part 12 has a function which detects the abnormal speed of the cage | basket | car 3 by comparing the cage | basket | car speed | rate calculated | required and an operation command value.

The elevator control unit 12 is connected to a safety circuit (relay circuit) 30 for suddenly stopping the car 3 in the event of an elevator failure. When the safety circuit 13 is in the open state, the energization of the drive unit 7 to the motor unit 9 is interrupted, and the energization of the brake unit 10 to the electromagnetic magnet is interrupted. The drive sheave 8 is braked.

A governor (mechanical governor) 14 is provided at an upper portion 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 the tension sheave 17 arranged in the lower part of 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 traveling 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 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 running 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 safety circuit 13 opens. When the traveling speed of the cage | basket | car 3 reaches the 2nd overspeed, the governor rope 16 is gripped by the rope catch of the governor 14, and 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, an encoder of a dual sense type 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 the electronic safety controller (safety control board) 21. The electronic safety controller 21 detects an abnormality of the elevator based on signals from sensors such as the governor encoder 15 and outputs a command signal for shifting the elevator to a safe state. Specifically, the electronic safety controller 21 has a function as, for example, an end floor forced deceleration device (ETS device). The ETS apparatus 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 the traveling speed of the car 3 near the terminal floor. Monitors whether or not the ETS monitoring overspeed has been reached.

Moreover, the ETS apparatus converts the signal from the governor encoder 15 into a digital signal, and performs a digital arithmetic process, and judges whether or not the traveling speed of the car 3 has reached the ETS monitoring overspeed. . If 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 in an open state.

In addition, the electronic safety controller 21 can detect an abnormality of the electronic safety controller 21 itself and an abnormality of the governor encoder 15. When an abnormality of the electronic safety controller 21 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 transmitted from the electronic safety controller 21 to the elevator control unit 12. Is outputted to the driving control unit. In addition, the electronic safety controller 21 and the operation control unit can be bidirectionally communicated.

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

In the lower part of the hoistway 1, the cage buffer 27 and the counterweight buffer 28 are provided. The car shock absorber 27 and the counterweight shock absorber 28 alleviate the impact when the car 3 and the counterweight 4 collide with the bottom of the hoistway 1. As these buffers 27 and 28, an inflow type or a spring type buffer is used, for example.

At the lower part of the car 3, a pair of car suspending pulleys 41a and 41b are provided. A counterweight suspending pulley 42 is provided on the counterweight 4. The car side return pulleys 43a and 43b and the balance weight side return pulley 44 are arrange | positioned at the upper part of the hoistway 1. The main rope 6 has 1st and 2nd edge parts 6a and 6b connected to the upper part of the hoistway 1 via the rope fixing part.

In addition, the main rope 6 is car suspending pulleys 41a and 41b, car side return pulleys 43a and 43b, drive sheave 8, and counterweight in order from the first end 6a side. It is wound around the side return pulley 44 and the counterweight suspending 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.

FIG. 2 is a graph showing a pattern of overspeed set in the ETS apparatus of the governor 14 and the electronic safety controller 21 of FIG. 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. In the governor 14, the first and second overspeed patterns V1 and V2 are set by mechanical position adjustment. The ETS monitoring overspeed pattern VE is set in the ETS apparatus.

The ETS monitoring overspeed pattern VE is set higher than the normal speed pattern V0. In addition, the ETS monitoring overspeed pattern VE is set so that the normal speed pattern V0 may be substantially equally spaced in the whole lifting stroke. That is, the ETS monitoring overspeed pattern VE is changing according to the car position. More specifically, although the ETS monitoring overspeed pattern VE is set to be constant near the middle floor, the ETS monitoring overspeed pattern VE is continuously and smoothly low as it nears the ends (top and bottom) of the hoistway 1 near the end floor. It is set to lose. Thus, although the ETS apparatus 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 running section in normal speed pattern V0), the intermediate | middle floor It is not necessary to monitor the neighborhood.

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. In addition, the 1st and 2nd overspeed patterns V1 and V2 are constant at all the heights in the hoistway 1.

3 is a block diagram showing a main part of FIG. The elevator control unit 12 has a first computer having a first CPU (computation processing unit) 31, a storage unit (R0M, RAM and a 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, the control program for realizing the function of the elevator control part 12 is stored in the memory | storage part of a 1st computer. The first CPU 31 executes arithmetic processing relating to the function of the elevator control unit 12 based on the control program.

Moreover, the elevator control part 12 is provided with the motor drive part 32 (inverter etc.) for driving the motor part 9. In addition, the elevator control unit 12 is provided with a first safety relay 33 for opening the safety circuit 13. When the emergency stop command is output from the first CPU 31 to the first safety relay 33, the safety circuit 13 opens. When the safety circuit 13 is opened, the motor contactor 34 is opened, the energization to the motor unit 9 is interrupted, the brake contactor 35 is opened, and the brake unit 10 is transferred to the electromagnetic magnet. The electricity is cut off.

The electronic safety controller 21 has second and third CPUs (computation processing units) 36 and 37, storage units (R0M, RAM, hard disk, etc.), and a second computer having a signal input / output unit. 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 of the second computer. The second and third CPUs 36 and 37 execute arithmetic processing relating to the functions 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 and the second and third safety relays 38 and 39 correspond to 1: 1. When the emergency stop command (forced deceleration command) is output from the second and third CPUs 36 and 37 to the third safety relays 38 and 39, the safety circuit 13 is opened.

The safety program includes the same first and second safety programs. The second CPU 36 executes arithmetic processing based on the first safety program. The third CPU 37 executes arithmetic processing based on the second safety program.

The second and third CPUs 36 and 37 are capable of communicating with each other via an interprocessor bus and a two-port RAM. Moreover, the 2nd and 3rd CPUs 36 and 37 are able to confirm the health of the 2nd and 3rd CPUs 36 and 37 itself by comparing a calculation process result with each other. That is, the health of the CPUs 36 and 37 is confirmed by performing the same process to the 2nd and 3rd CPUs 36 and 37, and comparing a process result.

The electronic safety controller 21 can also detect abnormalities of the electronic safety controller 21 other than the abnormalities of the CPUs 36 and 37 by calculation processing.

4 is an explanatory diagram showing a method of executing arithmetic processing by the second and third CPUs 36 and 37 in FIG. The second and third CPUs 36 and 37 are arranged in a predetermined operation period (for example, 50 msec) based on a signal from a fixed period timer in the second computer, depending on the program stored in the R0M. Repeat the operation.

The program executed within one cycle includes a safety program for detecting an abnormality in an elevator and a failure / abnormality check program for detecting a failure and an abnormality of the electronic safety controller 21 itself or various sensors. The fault / abnormal check program may be executed only when a preset condition is satisfied.

In the fault / error check program, for example, crack abnormality detection, RAM stack abnormality detection, arithmetic processing sequence abnormality detection, relay contact abnormality detection, power supply voltage abnormality detection, and the like are sequentially performed. Run

FIG. 5 is an explanatory diagram showing a method of executing arithmetic processing by the first CPU 31 in FIG. 3. The first CPU 31 repeatedly executes arithmetic processing in accordance with a program stored in R0M at a predetermined arithmetic cycle based on a signal from a fixed period timer in the first computer.

The program executed within one cycle includes a control program for controlling the operation of the elevator and a communication check program for confirming a communication state with the electronic safety controller 21. The communication check program may be executed only when a preset condition is satisfied.

In this way, the elevator control unit 12 performs communication for checking the communication state with respect to the electronic safety controller 21 at predetermined intervals. And when the response does not return normally from the electronic safety controller 21 (at the time of communication error detection), the elevator control part 12 will stop the car 3 safely when the car 3 is running (closest to the closest). The floor stop command) and automatic operation are normally disabled when the car 3 is stopped. When automatic driving is normally disabled, at least one of manual driving and low speed automatic driving may be allowed.

When a communication error is detected, the elevator control unit 12 outputs an abnormality detection signal to the elevator management room or the like. That is, when a communication error is detected, the elevator control part 12 generates the signal for informing an elevator manager of an abnormality.

In such an elevator apparatus, since the elevator control part 12 is able to communicate with the electronic safety controller 21, and the communication state with the electronic safety controller 21 can be confirmed at a predetermined timing, the electronic safety controller The state in which (21) is substantially absent can be detected, and reliability can be improved.

In addition, when abnormality is detected in the communication state with the electronic safety controller 21, the elevator control part 12 disables normal automatic operation of the cage | basket | car 3, so that the electronic safety controller 21 may be substantially absent. The car 3 can be prevented from driving by carrying passengers.

In addition, even when automatic driving is normally disabled, at least one of manual driving and low speed automatic driving is allowed, so that the car 3 cannot move completely at the time of board replacement by maintenance.

In addition, although the communication state confirmation signal from the elevator control part 12 is output repeatedly, you may make it judge that it is a communication error, when the response from the electronic safety controller 21 does not return normally even once. Moreover, in order to prevent the error detection of a communication error, you may make it judge that it is a communication error, when the response from the electronic safety controller 21 does not return normally normally only predetermined number continuously.

Moreover, information, such as the car speed | rate calculated | required by the elevator control part 12, may be included in the communication state confirmation signal, In this case, the information calculated | required by the electronic safety controller 21 and the elevator control part 12 by the electronic safety controller 21 may be included. ), The information obtained may be compared with each other so as not to respond (normally not allowed to operate) when matching cannot be achieved. Thereby, the cage | basket | car 3 is prevented from operating in the state in which the wrong electronic safety controller 21 was installed.

Further, at least one of the elevator control unit 12 and the electronic safety controller 21 may monitor the movement of the car 3 from the sensor information after the brake operation for each car stop. That is, you may have a function which checks whether the cage | basket | car 3 is stopped still appropriately after brake operation. As a result, it is possible to confirm whether or not the required reduction torque is secured by the brake unit 10.

The timing of the confirmation operation of such deceleration torque is not limited to every stop of a car. For example, when the car 3 stops on a predetermined floor, only a preset number of times, when the car 3 stops, the first time within a preset period (for example, 1 day, 1 hour or 10 minutes) It may be performed when the car 3 is stopped or the like.

Furthermore, the detection switch operated mechanically by removing the board | substrate of the electronic safety controller 21 is provided, and the elevator control part 12 checks the open / closed state of a detection switch regularly, and the electronic safety controller 21 is carried out. ) May be confirmed to be substantially absent.

Moreover, the communication between the elevator control part 12 and the electronic safety controller 21 may be performed by wired communication through a communication cable, or may be performed by wireless communication, such as a wireless LAN.

As described above, the present invention can be used for an elevator apparatus using an electronic safety controller that detects an abnormality of an elevator based on a detection signal from a sensor.

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

FIG. 2 is a graph illustrating a pattern of overspeed set in the ETS apparatus of the governor and the electronic safety controller of FIG. 1.

3 is a block diagram showing a main part of FIG.

4 is an explanatory diagram showing a method of executing arithmetic processing by the second and third CPUs of FIG.

FIG. 5 is an explanatory diagram showing a method of executing arithmetic processing by the first CPU of FIG. 3.

Claims (6)

An elevator control unit for controlling the operation of the car, and An electronic safety controller that detects an abnormality of the elevator based on a detection signal from a sensor for detecting the elevator state, and outputs a command signal for shifting the elevator to a safe state; The elevator control unit, Communication with the electronic safety controller is enabled, and communication status with the electronic safety controller can be confirmed at a predetermined timing, The elevator apparatus stops the car when the car is running when an abnormality is detected in the communication state with the electronic safety controller, and disables the normal automatic operation of the car. An elevator control unit for controlling the operation of the car, and An electronic safety controller which detects an abnormality of the elevator based on a detection signal from a sensor for detecting the elevator state and outputs a command signal for shifting the elevator to a safe state; The elevator control unit, Communication with the electronic safety controller is enabled, and communication status with the electronic safety controller can be confirmed at a predetermined timing, When an abnormality is detected in the communication state with the electronic safety controller, the elevator stops the car when the car is running, disabling normal automatic operation of the car, and permitting manual operation of the car. . An elevator control unit for controlling the operation of the car, and An electronic safety controller which detects an abnormality of the elevator based on a detection signal from a sensor for detecting the elevator state and outputs a command signal for shifting the elevator to a safe state; The elevator control unit, Communication with the electronic safety controller is enabled, and communication status with the electronic safety controller can be confirmed at a predetermined timing, When an abnormality is detected in the communication state with the electronic safety controller, the elevator stops the car when the car is running, disables normal automatic operation of the car, and permits low speed automatic operation of the car. Device. An elevator control unit for controlling the operation of the car, and An electronic safety controller that detects an abnormality of the elevator based on a detection signal from a sensor for detecting the elevator state and outputs a command signal for shifting the elevator to a safe state; The elevator control unit, Communication with the electronic safety controller is enabled, and communication status with the electronic safety controller can be confirmed at a predetermined timing, An elevator apparatus for stopping a car when the car is traveling and generating a signal for causing an elevator manager to fail when an abnormality is detected in the communication state with the electronic safety controller. An elevator control unit for controlling the operation of the car, and An electronic safety controller which detects an abnormality of the elevator based on a detection signal from a sensor for detecting the elevator state and outputs a command signal for shifting the elevator to a safe state; The elevator control unit, Communication with the electronic safety controller is enabled, and communication status with the electronic safety controller can be confirmed at a predetermined timing, If an abnormality is detected in the communication state with the electronic safety controller while the car is running, the car is stopped. An elevator apparatus for outputting a signal for confirming a communication state to the electronic safety controller at predetermined intervals, and determining whether there is an abnormality in the communication state by whether or not the response from the electronic safety controller returns normally. The method of claim 5, The elevator control unit determines that the communication state is abnormal when the response from the electronic safety controller is abnormal for a predetermined number of times continuously.

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