JPS6320745B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for generating a speed command signal for an elevator.

It is well known that elevators are speed controlled by speed command signals. Recently, digital speed command generation devices that issue digital speed command signals have been put into practical use. This generates movement pulses according to the movement amount and direction of the elevator car, and by reversibly counting these pulses, it detects the relative position of the car and calculates the distance to the scheduled stop floor. It generates a digital speed command signal. This is Figure 1a
is represented by the first speed command signal X.

However, the above-mentioned travel pulse is generally detected by the rotation angle of the drive sheave of the elevator hoist or the sheave of the speed governor, and the relationship between these sheaves and the ropes wound around them is Errors occur in distance detection due to slippage between the two. In order to prevent this, when the car reaches point C, which is a predetermined distance before the scheduled stop floor B, a large number of switches installed in the hoistway engage with cams installed on the car, or The second speed command signal Y is generated by electromagnetic coupling between a metal plate having a specific shape and a detection relay provided on the car. Since this second speed command signal Y is based on absolute distance detection, the accuracy of the speed command value with respect to distance is higher than the first speed command signal X, and is accurate and stable for any floor. It has the advantage of being able to stop the car.

However, this second speed command signal Y is
In order to indicate a fixed speed command value for the position, the first
If there is an error in the detected distance in the second speed command signal X, the transition to the second speed command signal Y will not be performed smoothly. That is, as shown in Figure 1b, the basket is at point C.
When the speed command value indicated by the first speed command signal X is lower than the speed command value indicated by the second speed command signal Y when the speed reaches A step difference occurs in the speed command signal, which causes a worsening of the ride comfort of the car.

This invention improves the above-mentioned problems, and the first
The difference between the speed command signal and the second speed command signal is converted into a multiplication factor, and this is multiplied by the second speed command signal to match the first speed command signal, thereby converting both speed command signals. An object of the present invention is to provide a speed command signal generating device for an elevator, which improves the riding comfort of a car by smoothing the process.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In the diagram, 1 to 9 are floors 1 to 9, 1A to 9A.
1B to 9B are fixedly installed at the hoistway positions of 1st to 9th floors 9, respectively, and the cars 10 to be taken out later are located above and below from each floor. 10 is an elevator car, and 11 is a detection piece 1B to 9 installed in the car 10.
A landing section detector whose landing section signal 11a becomes "H" when facing B, 12 a destination button installed in the car 10, 13 a call signal for the hall buttons 1A to 9A and the destination button 12, 14 a change 15 is a main rope that connects the car 10 and the counterweight 14; 16 is a hoisting machine that drives a driving sheave 17 provided in the machine room and around which the main rope 15 is wound; 18;
20 is a movement amount detector that is driven by a sheave 17 via a timing belt 19 and emits a movement amount pulse signal 18a for raising and lowering each time the car 10 moves a predetermined distance, for example, 5 mm; 20 is a call signal 13; 21 is a landing section signal 11 which inputs the movement amount pulse signal 18a and issues the first speed command signal X to the scheduled stop floor B, and when decelerating, the deceleration command signal 20a becomes "H".
When a becomes "H", a landing speed command generator 22 emits a second speed command signal Y proportional to the distance between the car 10 and the scheduled stop floor B based on the movement amount pulse signal 18a; 22 is a first speed command signal; A subtractor 23 calculates the difference between X and the second speed command signal Y, a memory 23 holds the output of the subtractor 22 at the time when the landing section signal 11a becomes "H", and a memory 24 stores the output of the subtractor 22. A multiplication factor decoder that converts the output into a predetermined value, 25 a multiplier that multiplies the second speed command signal Y by the output of the multiplication factor decoder 24 to generate the second speed command signal Y1, 26 a speed command signal 20a and landing section signal 1
An AND gate with 1a as an input, 27 selects the value of input A as output C when input S is "L",
When the input S is "H", the selector selects the value of the input B as the output C, and 27a is the output C of the selector 27.
The speed command signal 28 is a drive controller that drives the electric motor (not shown) of the hoist 16 in accordance with the speed command signal 27a.

Next, the operation of this embodiment will be explained.

It is now assumed that the car 10 is stopped on the first floor 1, a call for the 8th floor is registered by the 8th floor landing button 8A or the 8th floor destination button 12, and a call signal 13 is issued. Since the car 10 is on the first floor 1 and the landing section detector 11 faces the detection piece 1B on the first floor, the landing section signal 11a is "H". However, since the deceleration command signal 20a is "L", the output of the AND gate 26 is "L".
Therefore, the selector 27 is in a state of selecting the first speed command signal X and outputting it to the drive controller 28. In response to the call signal 13, the normal speed command generator 20
A first speed command signal X is issued to stop the car 10 on the 8th floor 8. This is given as the speed command signal 27a, and the drive controller 28 drives the hoist 16, so that the car 10 stops on the 8th floor 8. Run towards.

When the car 10 reaches a predetermined point to decelerate, the deceleration command signal 20a of the regular speed command generator 20 becomes "H", and the value of the first speed command signal X begins to decrease, and the car 10 reaches the 8th floor. Start decelerating towards 8. When the car 10 approaches the 8th floor 8 and the landing section detector 11 faces the detection piece 8B on the 8th floor at point C, the landing section signal 11a becomes "H" and the output of the AND gate 26 becomes "H". ”. Further, a second speed command signal Y is generated from the landing speed command generator 21. Then, the subtracter 22
The difference between the speed command signal X of
The difference between both command signals X and Y at the point is held. On the other hand, the multiplication factor decoder converts the difference into a multiplication factor, which is multiplied by the second speed command signal Y in the multiplier 25 to become the second speed command signal Y1. This multiplication rate is set so that when the second speed command signal Y is multiplied, it matches the first speed command signal X at that time, so 250mm in front of the floor
The second speed command signal Y1 at point C is the third
As shown in the figure, this corresponds to the first speed command signal X. Therefore, the transition of both command signals X and Y is smooth, and the riding comfort of the car 10 is not impaired. From then on,
The proportional relationship between the distance from the car 10 to the floor of the 8th floor 8 and the second speed command signal Y1 is maintained, and the car 10 is
You will land exactly on floor 8.

As explained above, in this invention, the first speed command signal is generated by counting the pulses generated according to the amount of movement of the car, and when the car reaches a predetermined distance before the floor where the car is scheduled to stop, generates a second speed command signal corresponding to the absolute distance of the first speed command signal;
Calculate the difference between the speed command signal and the second speed command signal, convert this into a multiplication factor, multiply this by the second speed command signal, make it match the first speed command signal, and then output it. As a result, the transition between the two command signals becomes smooth, the ride comfort of the car can be improved, and the car can be accurately landed on the floor where it is scheduled to stop.

[Brief explanation of the drawing]

FIG. 1 is a speed command signal curve diagram of a conventional elevator speed command generator, FIG. 2 is a block circuit diagram showing an embodiment of the elevator speed command generator according to the present invention, and FIG. 3 is a diagram of a speed command signal curve of a conventional elevator speed command generator. It is a speed command signal curve diagram. 1B to 9B...Detection pieces from the 1st to 9th floors, 10...
Elevator car, 11... Implantation section detector, 1
6...Hoisting machine, 18...Movement amount detector, 20...
Regular speed command generator, 21... Landing speed command generator, 22... Subtractor, 23... Memory device, 24...
Multiplication factor decoder, 25... Multiplier, 26...
AND gate, 27... Selector, 28... Drive controller, X... First speed command signal, Y, Y1...
Second speed command signal. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. The first position is detected by counting the pulses generated according to the amount of movement of the car and detecting the position of the car.
a regular speed command generator that generates a speed command signal of
A landing speed command generator that generates a second speed command signal corresponding to the absolute distance from the floor when the car approaches the floor where the car is scheduled to stop, and operates when the car reaches a predetermined distance before the floor where the car is scheduled to stop. a position detector, a speed difference conversion device that detects a difference between the first speed command signal and the second speed command signal when the position detector operates, stores this difference, and converts it into a multiplication factor; When the position detector operates, the second speed command signal is multiplied by the multiplication value according to the stored value, and the second speed command signal is changed to the first speed command signal.
A multiplier that matches the speed command signal of the first speed command signal and continues the above multiplication thereafter, and a multiplier that always selects the first speed command signal and when the position detector operates while the car is decelerating, selects the output of the multiplier and outputs it. An elevator speed command generation device comprising a selector for