JP2005126181A - End floor deceleration device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an end floor deceleration device for an elevator capable of landing on the end floor comfortably in deceleration and equipped with an enhanced safety by stopping the elevator upon sensing a failure in an end sensor. <P>SOLUTION: The end floor deceleration device of the elevator is equipped with an end floor sensor 5 to generate a position signal of an elevator car 1, a pulse generator 9, a normal residual distance computing device 20 to compute the normal residual distance till the destination floor on the basis of the count of a pulse counter and the particular floor position data recorded, an end floor residual distance computing device 21 to compute the distance till the end floor on the basis of the count of the pulse counter and take the position data of the end floor as the end floor residual distance till the end floor to be determined with each position signal input, a comparative selecting device 14 to compare the computed normal residual distance with the computed end floor residual distance and select the one whichever is smaller, and a speed control part 15 to control the speed of a motor for driving the elevator in accordance with the residual distance selected by the comparative selecting device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator terminal floor reduction device that decelerates and stops an elevator to the terminal floor.

FIG. 6 is a block diagram showing the configuration of a conventional elevator terminal floor reduction gear (see, for example, Patent Document 1).
In FIG. 6, reference numeral 1 denotes an elevator car (hereinafter simply referred to as “car”), and a top detection cam 1 </ b> A is provided at the top of the car 1. Reference numeral 2 denotes a main rope, which is wound around a sheave 4 with a car 1 at one end and a counterweight 3 suspended at the other end in a fishing bottle shape. Reference numerals 5A to 5D denote end detectors, which are arranged at predetermined intervals over a distance A from the deceleration start point of the car 1 to the end floor 6, and each time the car position data is engaged with the end detection cam 1A. Is output. 8 is an electric motor that drives the sheave 4, 9 is a pulse generator that generates a pulse 9 A according to the number of revolutions of the electric motor 8, and 10 is a count of the generated pulse 9 A and the counted value is the actual car position data of the car 1. 10A is a pulse counter that outputs as 10A, and 11 is a terminal deceleration command signal generator. Each time the car position signal is taken in from the terminal detectors 5A to 5D, the car position signal is subtracted from the previously stored position data of the terminal floor 6. The remaining distance to the terminal floor is calculated from the difference value, and the terminal deceleration command signal 11A is calculated. Reference numeral 12B denotes a terminal deceleration auxiliary command signal generator which generates and outputs a terminal deceleration auxiliary command signal 12C based on the actual car position data 10A output from the pulse counter 10. 13B is a normal deceleration command signal generator, which similarly generates and outputs a normal deceleration command signal 13C based on the actual car position data 10A. 14B1 compares the terminal deceleration command signal 11A and the terminal deceleration auxiliary command signal 12C, and selects and outputs a deceleration command signal having a low deceleration as the first deceleration command signal 14C. The second comparison / selection device compares the deceleration command signal 14C selected and output from the comparison selector 14B1 with the normal deceleration command signal 13C and selectively outputs a command signal having a low deceleration as the deceleration command signal 14D. A speed control unit 15 outputs a speed control signal 15A for controlling the speed of the electric motor 8 based on the deceleration command signal 14D.

Next, the operation of the conventional elevator terminal floor reduction device according to the above-described configuration will be described. First, when the electric motor 8 that moves the car 1 up and down starts driving, the pulse generator 9 engaged with the electric motor 8 also operates to generate a pulse 9A. The pulse 9A is counted by the pulse counter 10, whereby the actual car position data 10A indicated by the count value is taken into the normal deceleration command signal generator 13B. The normal deceleration command signal generator 13B takes in the actual car position data 10A, which is sequentially updated according to the ascending position of the car 1, and compares it with the prestored position data of each floor, and compares the travel distance to the target floor (hereinafter, the normal remaining distance) ) And issue a deceleration command. A normal deceleration command signal 13C corresponding to the normal remaining distance is calculated and output to the second comparison selector 14B2. When the car 1 approaches the distance A1 to reach the terminal floor 6 and the terminal detection cam 1A installed at the top of the car 1 is first engaged with the terminal detector 5A, the car position signal 5AS is transmitted to the terminal deceleration command signal generator. 11 is output. As a result, the terminal deceleration command signal generator 11 obtains a difference value by subtracting the car position signal 5AS from the position data of the terminal lowering stored in advance, and this difference value is obtained until the car 1 reaches the terminal floor 6. Based on this remaining distance, a terminal deceleration command signal 11A that smoothly changes to stop landing on the terminal floor 6 is calculated based on this remaining distance, and is output to the first comparison selector 14B1. At this time, when the first comparison selector 14B1 determines that the terminal deceleration assist command signal 12C <the terminal deceleration command signal 11A, the terminal deceleration command signal 11A is output to the second comparator / selector 14B2. Reference numeral 12B denotes a terminal deceleration auxiliary command signal generator that calculates the distance to the terminal floor based on the actual car position data 10A output from the pulse counter 10 and the position data of each floor stored in advance. Based on this terminal floor remaining distance, a terminal deceleration auxiliary command signal 12C that smoothly changes to stop the car 1 from landing on the terminal floor 6 is calculated and output to the first comparison selector 14B1. When the second comparison selector 14B2 determines that the normal deceleration command signal 13C <the terminal deceleration auxiliary command signal 14C, the normal deceleration command signal 13C is output to the speed control unit 15 as the deceleration command signal 14D. The speed control unit 15 outputs a speed control signal 15A for controlling the speed of the electric motor 8 based on the deceleration command signal 14D. On the other hand, the terminal deceleration auxiliary command signal generator 12B that takes in the same car position signal 5AS obtains a difference value by subtracting the car position signal 5AS from the position data of the terminal lowering 6 that has been stored in advance, and this difference value is obtained by the car 1. The auxiliary remaining distance until reaching the terminal floor 6 is calculated, and the terminal deceleration auxiliary command signal 12C that smoothly changes to stop the car 1 from landing on the terminal floor 6 based on the auxiliary remaining distance is calculated and output. .
Accordingly, even when the position detector or the deceleration preparation point detection cam breaks down and an abnormality occurs in the normal deceleration command signal 13C, deceleration landing can be performed by the terminal deceleration auxiliary command signal 12C. Further, when the second comparison selector 14B2 determines that the normal deceleration command signal 13C <the terminal deceleration auxiliary command signal 12C, the normal deceleration command signal 13C, or the normal deceleration command signal 13C ≧ the terminal deceleration auxiliary command signal 12C When the determination is made, the terminal deceleration auxiliary command signal 12C is output to the speed control unit 15 as the deceleration command signal 14D.
In the calculation operation of the terminal deceleration command signal 11A, the terminal detection cam 1A is engaged with the terminal detectors 5B to 5D, and the car position signals 5BS to 5DS are converted into the terminal deceleration command signal generator 11 and the terminal deceleration command signal generator 12B. It is performed every time it is output. As a result, the remaining distance until the car 1 reaches the terminal floor 6 is sequentially updated, and the terminal deceleration command signal 11A corresponding to the updated remaining distance is calculated and output.
Here, the terminal deceleration command signal 11A has a higher deceleration than the normal deceleration command signal 13C, and the terminal deceleration auxiliary command signal 12C has a deceleration higher than the normal deceleration command signal 13C and lower than the terminal deceleration command signal 11A. . FIG. 7 illustrates these relationships.

JP-A-5-319726

  Since the terminal floor deceleration device of the conventional elevator is configured as described above, the terminal deceleration command signal 11A and the terminal deceleration auxiliary command signal 12C have a feature that the deceleration is higher than the normal deceleration command signal 13C. When the vehicle is decelerated by the terminal deceleration command signal 11A and the terminal deceleration auxiliary command signal 12C due to a failure of the terminal detector, there is a problem that riding comfort is deteriorated.

  The present invention has been made to solve the above-described problems. Even when the remaining distance to the target floor is abnormal and the vehicle is decelerated by the terminal detector, the vehicle can decelerate and land on the terminal floor comfortably and detect the terminal. It is an object of the present invention to obtain an elevator terminal floor decelerator that improves safety by detecting a failure of a unit and stopping the elevator.

  In the terminal floor speed reducer according to the present invention, the terminal floor detection is provided at a predetermined interval from the front of the terminal floor toward the terminal floor and generates a position signal indicating the position of the elevator car each time the elevator car approaches. To the destination floor based on the count value of the pulse counter and the pre-recorded position data of each floor, the pulse generator that generates pulses according to the traveling of the elevator car, the pulse counter that counts the generated pulses The normal remaining distance calculation device for calculating the normal remaining distance of the terminal, the distance to the terminal floor is calculated based on the count value of the pulse counter, and the terminal floor position data to the terminal floor is calculated every time a position signal is input. Comparing the terminal floor residual distance calculation device as the distance with the normal residual distance calculated by the normal residual distance calculation device and the terminal floor residual distance calculation by the terminal floor residual distance calculation device and selecting the lower one Choice And location, in which a speed control unit for controlling the speed of an electric motor for an elevator drive according to the remaining distance selected by the comparison selecting unit.

  In addition, the comparison / selection device selects the remaining distance on the end floor, recognizes that the elevator car has traveled to the end floor, and measures the position data of each floor when this travel reaches a predetermined number of times, and compares and selects after this measurement is completed. The device further comprises means for selecting the remaining terminal floor distance and recognizing that the elevator car has traveled to the terminal floor, and means for judging the failure of the terminal floor detector and stopping the elevator when a failure is detected. Is.

  Since the present invention is configured as described above, the normal remaining distance is compared with the terminal floor remaining distance, and the smaller value is selected and the deceleration command signal is generated with the normal deceleration. Riding comfort does not deteriorate even when decelerating at the remaining floor distance. In addition, when decelerating and landing to the terminal floor due to the terminal floor remaining distance, after measuring the position data of each floor stored in advance, the terminal detector of the terminal detector is again decelerated to the terminal floor using the terminal floor remaining distance. Safety is improved because it is determined that there is a failure and the elevator is stopped. In addition, the reliability of failure determination is high.

Embodiment 1 FIG.
1 is a block diagram showing a configuration of an elevator terminal floor reduction gear according to Embodiment 1 of the present invention.
In FIG. 1, reference numeral 1 denotes an elevator car (hereinafter simply referred to as a car), and a top end detection cam 1 </ b> A is provided at the top of the car 1. Reference numeral 2 denotes a main rope, which is wound around a sheave 4 with a car 1 at one end and a counterweight 3 suspended at the other end in a fishing bottle shape. Reference numerals 5A to 5D denote end detectors, which are arranged at predetermined intervals over a distance A from the deceleration start point of the car 1 to the end floor 6, and each time the car position data is engaged with the end detection cam 1A. Is output. 8 is an electric motor that drives the sheave 4, 9 is a pulse generator that generates a pulse 9 A according to the number of revolutions of the electric motor 8, and 10 is a count of the generated pulse 9 A, and the counted value is the actual car position data of the car 1. A pulse counter 20 is output as 10A, and a normal remaining distance calculating device 20 is a normal remaining distance calculation device based on the count value 10A of the pulse counter 10, that is, actual car position data and pre-recorded position data (not shown) of each floor. Calculate distance (travel distance to daily floor). A terminal floor remaining distance calculation device 21 calculates the terminal floor remaining distance by subtracting the change in the count value 10A of the pulse counter 10 and also operates every time the car 1 approaches the terminal floor. When there is an input from 1A, the position data of the terminal floor is preset as the terminal floor remaining distance. A comparison / selection device 14 compares the normal remaining distance and the terminal floor remaining distance and selects the lower one. A deceleration command signal generator 13 generates a deceleration command signal from the remaining distance selected by the comparison / selection device 14. A speed control unit 15 outputs a speed control signal 15A for controlling the speed of the electric motor 8 based on the deceleration command signal from the deceleration command signal generator 13.

FIG. 2 is an operation flowchart of the normal remaining distance calculating means in the normal remaining distance calculating device 20.
First, the position of the destination floor is extracted from the position data of each floor previously recorded in step S201. In step S202, the actual car position 10A is input from the pulse counter 10. The normal remaining distance is calculated by taking the difference from the actual car position 10A in step S203 and the position of the destination floor extracted in step S201. The above operation is performed until the elevator stops (step S204).

FIG. 3 is an operation flowchart of the terminal floor remaining distance calculation means in the terminal floor remaining distance calculation device 21.
First, when it is recognized in step S301 that the end detector has been operated, a preset remaining distance is preset in step S302. If the end detector is not operating in step S301, the amount of movement of the car is calculated from the actual car position 10A in step S303. The calculation method may be the difference from the previous time. Next, in step S304, the moving amount of the car is deducted from the terminal floor remaining distance and updated as the terminal floor remaining distance. The above operation is performed until the elevator stops (step S305).

FIG. 4 is an operation flowchart of the remaining distance selection means in the comparison / selection device 14.
Here, the normal remaining distance and the terminal floor remaining distance are simply compared in step S401, and the lower one is output to the deceleration command signal generator 13 (step S402 or step S403). Note that α in step S401 is a predetermined distance with a margin for not erroneously selecting the terminal floor remaining distance due to the operation delay or installation error of the terminal detector.

Embodiment 2. FIG.
Next, an elevator terminal floor reduction device according to Embodiment 2 of the present invention will be described.
FIG. 5 is a flow chart of means for determining failure of the end detector and stopping the construction elevator.
This means operates in parallel with the first embodiment.
First, when the normal remaining distance and the terminal floor remaining distance are compared in step S501 and it is determined that the terminal floor remaining distance is larger, that is, abnormal, the number of abnormal occurrences is counted in step S502. In step S503, the number of occurrences of abnormality is determined. When the abnormality reaches twice, the position data of each floor is measured, and the position data of each floor stored in advance is updated (step S504). If the abnormality occurs three times, that is, if the abnormality occurs even if the position data of each floor is measured, it is determined that the end point detector has failed (step S505), and the elevator service is stopped in step S506. In step S502, the abnormality is allowed up to twice, because the distance per pulse of the pulse generator 9 changes due to the extension of the main rope 2 due to secular change and the position data of each floor cannot be matched. This is because this is not mistakenly regarded as a failure of the termination detector. Note that α in step S501 is the same as α in step S401 of the first embodiment.

It is a block diagram which shows the structure of the termination | terminus floor reduction gear apparatus of the elevator in Embodiment 1 of this invention. It is a flowchart explaining operation | movement of the normal remaining distance calculating apparatus in Embodiment 1 of this invention. It is a flowchart explaining operation | movement of the terminal floor remaining distance calculating apparatus in Embodiment 1 of this invention. It is a flowchart explaining operation | movement of the comparison selection apparatus in Embodiment 1 of this invention. It is a flowchart explaining the failure determination means of the termination | terminus detector of the termination | terminus floor reduction gear apparatus of the elevator in Embodiment 2 of this invention. It is a block diagram which shows the structure of the terminal termination | terminus reduction gear apparatus of the conventional elevator. It is a characteristic view which shows the deceleration of each conventional deceleration command signal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elevator car 1A End detection cam 2 Main rope 3 Balance weight 4 Sheave 5A-5D End detector 6 Terminal floor 8 Electric motor 9 Pulse generator 9A Pulse 10 Pulse counter 10A Real car position data 13 Deceleration command signal generator 14 Comparison selection device 15 Speed control unit 20 Regular remaining distance computing device 21 Terminal floor remaining distance computing device

Claims (2)

A terminal floor detector which is provided at a predetermined interval from the front of the terminal floor toward the terminal floor and generates a position signal indicating the position of the elevator car each time the elevator car approaches;
A pulse generator that generates pulses in response to the traveling of the elevator car;
A pulse counter for counting the generated pulses;
A normal remaining distance calculating device for calculating a normal remaining distance to the target floor based on the count value of the pulse counter and the position data of each floor recorded in advance;
A terminal floor remaining distance calculation device that calculates the distance to the terminal floor based on the count value of the pulse counter, and uses the position data of the terminal floor as the terminal floor remaining distance to the terminal floor for each position signal input;
A comparison / selection device that compares the normal remaining distance calculated by the normal remaining distance calculation device and the terminal floor residual distance calculation device calculated by the terminal floor residual distance calculation device, and selects the lower value;
A speed controller for controlling the speed of the electric motor for driving the elevator according to the remaining distance selected by the comparison and selection device;
An elevator terminal floor speed reducer characterized by comprising: Means for selecting the terminal floor remaining distance by the comparison and selection device, recognizing that the elevator car has traveled to the terminal floor, and measuring the position data of each floor when this traveling reaches a predetermined number of times;
Means for judging the failure of the terminal floor detector by recognizing that the elevator car has traveled to the terminal floor by selecting the terminal floor remaining distance by the comparison / selection device after completion of this measurement;
Means for stopping the elevator when a failure is detected;
The elevator terminal floor speed reducer according to claim 1, further comprising:

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