JP2001322773A - Control device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize safe landing action, by early detecting a deviation of a car position so as to prevent generation of a step difference in the case of landing of a car. SOLUTION: This control device comprises a means 2 generating a pulse train in proportion to a lift distance of a car, a landing switch means 1 detecting the car placed in a landing zone, a means counting the pulse train to detect changing of a landing position when the car is landed, and a car position correcting means executing correction of a car position in the case of detecting its change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device, and more particularly, to an elevator control device for correcting an elevator car position.

[0002]

2. Description of the Related Art Generally, in an elevator, a car position is detected from rotation of a rotating shaft of a motor for driving a hoist.
When the elevator car is accelerated or decelerated, the rope that suspends the car is pulled, so that the rope elongates. Therefore, in the traveling control of the car, an error occurs between the car and the actual car position due to the elongation of the rope when the car accelerates and decelerates.

An example of a situation where such a displacement of the car poses a problem is the landing of the car. If the displacement of the car is large, a step is generated between the floor of the car and the floor of the stop floor. 2. Description of the Related Art Conventionally, when a car arrives on the floor, a correction operation of the car position is performed.

In the car position correction in this type of landing control, a landing switch is provided at each stop floor, and the landing switch detects a shift in the car position and performs a correction operation. For example, when the displacement of the car position with respect to the landing level falls within a predetermined range, generally 10 to 15 cm, the landing switch is operated and the car position correction operation is started.

[0005]

However, in the conventional car position correction using the landing switch, the correction operation is not started until the landing switch is turned on. May not be started and the user may land on the floor as it is, and the user may get stuck on a step and trip. In addition, once the change range of the car position at which the landing switch operates is set, it is fixed as long as the position of the landing switch is not changed, and in order to shorten the correction operation start position, the position of the landing switch must be set. Or a new landing switch for correcting the car position must be newly provided, and there is a problem in that the switch cannot be changed at any time according to the use status of the elevator, the demand of the user, and the like.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, to detect a car position shift at an early stage, and to perform a safe landing operation so that a step does not occur when the car is landed. It is an object of the present invention to provide an elevator control device.

[0007]

According to an aspect of the present invention, there is provided an elevator control apparatus for detecting the position of a car and controlling the elevation of the car. Means for generating a pulse train proportional to the elevating distance, landing switch means for detecting that the car has entered the landing zone, and a signal based on the landing switch means and a signal based on the counting of the pulse train. It is characterized by comprising: means for detecting a change in the landing position when the car touches the floor; and car position correction means for performing a correction of the car position when the change in the car position is detected. Things.

According to the first aspect of the present invention, the arrival of the car in the landing zone is detected by the landing switch means,
With the signal from the landing switch means as a trigger, the position change is immediately detected by counting the pulse train, and the car position correction operation is performed, so even if there is a slight displacement, the car position is adjusted so that the step is eliminated. Can be corrected.

According to a second aspect of the present invention, in the first aspect, the car position correcting means detects a predetermined number of pulses after detecting a change in the car position, and then performs the car position correction. It is characterized by starting.

According to the second aspect of the present invention, the position at which the correction operation is started can be electronically set, and flexible setting can be performed in accordance with the use situation and the like.

Further, the invention described in claim 3 is characterized in that, in claim 1, the car position correcting means executes the car position correction immediately after the car position enters the landing zone and immediately before landing. Is what you do.

According to the third aspect of the present invention, since the car position is corrected immediately before landing after the car position enters the landing zone, high landing accuracy can be obtained.

According to a fourth aspect of the present invention, there is provided an elevator controller for detecting the position of a car and controlling the elevation of the car, wherein the means for generating a pulse train proportional to the elevation distance of the car, A landing switch means for detecting entry into the landing zone, a wheelchair car call registration means for generating a wheelchair car call signal, a wheelchair hall call registration means for generating a wheelchair hall call signal, and the car call or hall call Car position correction means for executing correction of the car position based on the counting of the pulses in response to the car position correction means, wherein the car position correction means, immediately after the landing car position enters the landing zone and immediately before landing. The present invention is characterized in that car position correction is performed.

According to the fourth aspect of the present invention, the position correction is performed immediately before landing only when responding to a wheelchair call,
Since a high landing accuracy that does not cause a step can be obtained, it is possible to prevent a fall due to a step or an accident such as taking a long time to get on and off and getting caught in a door, and it is possible for a wheelchair user to move up and down safely and smoothly.

According to a fifth aspect of the present invention, in the fourth aspect, when the car position correcting means responds to a wheelchair car call, the car position correcting means performs a correction for shifting a landing position of the car above the floor of the hall. In response to a wheelchair hall call, a correction is made to shift the landing position of the car below the floor of the hall.

According to the fifth aspect of the present invention, the floor is lowered so that the wheelchair user gets lower in the direction of getting on and off.
It is possible to get on and off smoothly without burdening the user.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator control device according to the present invention will be described below with reference to the accompanying drawings.

First Embodiment FIG. 1 is a diagram showing an elevator control device according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a landing switch for detecting that an elevator car has entered a landing zone whose area is set in advance at a landing on each floor. The landing switch 1 is provided for each landing on each floor in the elevator hoistway.
Reference numeral 2 denotes a pulse generator that generates a pulse train proportional to the distance the car is moved up and down. This pulse generator 2
Is provided in a motor or a governor for driving a hoist in a machine room, and has a pulse resolution capable of coping with a minute elevating distance of a car. Reference numeral 3 denotes an arithmetic unit.
Has a function of counting the pulse trains taken from the pulse generator 2 in addition to the normal running control of the car, detecting the change in the landing position when the car is landing, and detecting the change in the car position. It has a function to execute the correction of the car position when it is done.

FIG. 2 is a flowchart showing the operation of the arithmetic unit 3. First, when the car responding to the car call or the hall call enters an operation of landing on the stop floor, the landing switch 1 is turned on and the arithmetic unit 3 receiving the signal
Detects the landing position of the car by counting the pulse train generated by the pulse generator 2 (step 101).
Next, the arithmetic unit 3 detects the change in the car position by comparing with the count of the pulse train when the landing is performed normally without any displacement (step 102). Then, when a change is detected in the car position, a car position correction operation is performed (step 103). This car position correction is performed by comparing a preset landing pulse train count with an actual pulse train count and moving the car until the actual count becomes the same as the set value.

As described above, after the landing switch detects that the car has landed, the change in the car position is immediately detected by counting the pulse train regardless of the landing position, and the car position correcting operation is executed. Therefore, even if the position is slightly shifted, the car position is corrected so that the step is eliminated.

After detecting a change in the car position in step 102, a predetermined number of pulse trains may be detected before starting the car position correction in step 103. According to this, the position at which the correction operation is started can be electronically set, and flexible setting can be performed in accordance with the use situation and the like.

Second Embodiment FIG. 3 is a flowchart showing the operation of an elevator control device according to a second embodiment of the present invention. The configuration of the second embodiment is the same as that of FIG.

First, when the car responding to the car call or the hall call approaches the stop floor, the speed of the car is reduced (step 104). Next, when the car approaches the landing position on the stop floor and the landing switch 1 is turned on, the arithmetic unit 3 receives the signal (step 105). After that, the arithmetic unit 3 corrects the position of the car by counting the pulse train generated by the pulse generator 2 until a preset car position correction pulse value is reached (step 106). After the correction is completed, the car is stopped (step 107).

According to the second embodiment, since the car position is corrected immediately after the car position enters the landing zone and immediately before landing, a high landing accuracy can be obtained.

Third Embodiment FIG. 4 is a diagram showing an elevator control device according to a third embodiment of the present invention.

In the third embodiment, in addition to a landing switch 1, a pulse generator 2, and an arithmetic unit 3, a wheelchair car call registration device 4 for generating a wheelchair car call signal, and a wheelchair for generating a wheelchair hall call signal Hall call registration 5 is provided. The arithmetic unit 3 receives a wheelchair car call signal generated by the wheelchair car call registration device 4 and a wheelchair hall call signal generated by the wheelchair hall call registration device 5, and causes the car to respond to these signals.

FIG. 5 is a flowchart showing the operation of the elevator control device according to the present embodiment.

First, when a wheelchair car call is registered (step 108) or a wheelchair hall call is registered (step 109), the arithmetic unit 3 responds to the wheelchair car call signal or the wheelchair hall call signal. The wheelchair car is moved up and down toward the designated floor (step 110, step 111). Eventually, when the wheelchair car approaches the target stop floor, the speed of the car is reduced (step 112). Next, when the wheelchair car approaches the landing position on the stop floor and the landing switch 1 is turned on, the arithmetic unit 3 receives the signal (step 113). After that, the arithmetic unit 3
Until the preset car position correction pulse value is reached.
The position of the car is corrected by counting the pulse train generated by the pulse generator 2 (step 114). After the correction is completed, the car is stopped (step 115).

According to the third embodiment, only when responding to a wheelchair call, position correction is performed immediately before landing, and a high landing accuracy that does not cause a step can be obtained. It is possible to prevent an accident such as taking a long time to get on and off and getting caught in a door, so that a wheelchair user can get up and down safely and smoothly.

In the car position correction in step 114, the actual landing position of the car may be changed between a wheelchair car call and a wheelchair hall call as follows. That is, when responding to a wheelchair car call, the car landing position is corrected to be higher than the hall floor, and when responding to a wheelchair hall call, the car landing position is lower than the hall floor. Correction to shift to the side. According to this, since the floor is lowered so as to be lowered in the direction of the getting on and off of the wheelchair user, the getting on and off can be performed more smoothly without imposing a burden on the user.

[0032]

As is apparent from the above description, according to the present invention, the displacement of the car position is detected at an early stage, and a safe landing operation is realized so that a step is not generated when the car is placed on the floor. The user can get on and off safely and smoothly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an elevator control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the elevator control device according to the embodiment.

FIG. 3 is a flowchart showing an operation of the elevator control device according to the second embodiment.

FIG. 4 is a block diagram showing a schematic configuration of an elevator control device according to a third embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the elevator control device according to the embodiment.

[Explanation of symbols]

 1 landing switch 2 pulse generator 3 arithmetic unit 4 wheelchair car call registration device 5 wheelchair hall call registration device

Claims (5)

[Claims] 1. An elevator controller for detecting the position of a car and controlling the elevation of the car, comprising: means for generating a pulse train proportional to the elevation distance of the car; and when the car enters a landing zone. Landing switch means for detecting a change in the landing position when the car landed on the basis of a signal based on the landing switch means and a signal based on the count of the pulse train; and An elevator control device, comprising: a car position correcting means for correcting a car position when a change is detected. 2. The car position correcting means according to claim 1, wherein said car position correcting means starts the car position correction after detecting a predetermined number of pulses after detecting a change in the car position. Elevator control device. 3. The elevator control apparatus according to claim 1, wherein the car position correcting means executes the car position correction immediately after the landing car position enters the landing zone and immediately before landing. . 4. An elevator controller for detecting the position of a car and controlling the elevation of the car, comprising: means for generating a pulse train proportional to the elevation distance of the car; and wherein the car enters a landing zone. Landing switch means for detecting a wheelchair car call signal, a wheelchair car call registration means for generating a wheelchair car call signal, a wheelchair hall call registration means for generating a wheelchair hall call signal, and a car position in response to the car call or hall call. Car position correction means for performing correction based on the counting of the pulses, wherein the car position correction means executes the car position correction immediately after the landing car position enters the landing zone and immediately before landing. An elevator control device characterized by the above-mentioned. 5. The car position correcting means performs a correction for shifting a landing position of a car to a position higher than a floor of a hall when responding to a wheelchair car call, and correcting the car when responding to a wheelchair hall call. The elevator control device according to claim 4, wherein a correction is performed to shift the landing position to a position lower than the floor of the hall.