JP3695286B2 - Elevator control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in an elevator control device.
[0002]
[Prior art]
Recent elevators are equipped with a microcomputer in the control device, and perform registration and speed control of calls generated at the elevator car and the hall.
[0003]
In particular, when detecting the position of an elevator car, a known pulse encoder is used, and FIG. 2 shows a block diagram of the car position detection.
[0004]
In the figure, reference numeral 1 is a pulse encoder attached to the shaft of a normal hoisting machine, and generates two types of pulses having different phases each time the elevator car moves. 2 is a direction detecting device for determining whether the elevator car is rising or falling from these two types of pulses, 3 is a counter for adding / subtracting pulses from the pulse encoder 1 according to the moving direction of the eco-car, 4 is a CPU of the microcomputer, 5 is For example, a signal contact group indicating the absolute position of an elevator car such as a limit switch, 6 is an interface, 7 is a RAM in which floor position data is stored.
[0005]
The floor position data in the RAM 7 is data obtained by running between the lowermost floor and the uppermost floor at a low speed before the elevator car starts normal traveling, and storing the data of each floor. Stored in the RAM 7.
[0006]
By the way, the elevator is provided with a slow-down operation mechanism that forcibly decelerates the elevator car heading to the final floor as one of safety devices in the event that the elevator car passes through without decelerating at a normal deceleration point.
[0007]
That is, as shown in FIG. 3, the elevator car 10 heading to the final floor must be at a predetermined speed or less at a point where the slow-down switch 11 operates (a point where the cam 10 a presses the lever 11 a of the switch 11). If the predetermined speed is exceeded, the vehicle is decelerated stronger than the normal deceleration so as not to go too far over the final floor.
[0008]
When the slow down switch 11 is operated, the output of the counter 3 is corrected by the CPU 4.
[0009]
[Problems to be solved by the invention]
However, particularly in the case of an elevator with a high speed, the structure of the slow-down switch is different from that shown in FIG. For example, a long cam having an inclination of about 1/100 is installed in the tower, and a switch is arranged in the elevator car 10.
[0010]
For this reason, a considerable range of the car position detection occurs, and in addition to the mechanical problem that the accurate position detection cannot be performed, the switch may be erroneously operated in a different car position according to the lateral vibration of the elevator car 10, or As a result of the counter 3 performing erroneous addition / subtraction by picking up electrical noise, accurate position detection may not be performed. In particular, this noise problem occurs regardless of the speed of the elevator, and the subject of the present invention is not necessarily limited to a high-speed elevator.
[0011]
Then, as a result of the car position correction performed by the signal contact group 5, there may be a situation where the car position information is warped and wrong.
[0012]
The present invention has been made in view of the above points, and an object thereof is to provide an elevator control device having flexible car position information.
[0013]
[Means for Solving the Problems]
The present invention relates to an elevator that causes a forced deceleration that is stronger than a normal deceleration when the speed at the position of the elevator car toward the terminal floor is greater than or equal to a predetermined value by a switch. A first detection means and a second detection means for detecting the position of the elevator car are provided, and correction is made to correct the output of the first detection means when the elevator car passes a predetermined point toward the terminal floor. And determining means for determining the operation of the switch. If the switch is operated normally by the determining means, the position of the corrected car is corrected by the correcting means. If the switch is abnormal, the second detecting means is used. The car position is selected.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, a case where position information is corrected and a case where position information is not corrected are used together, and the correct one is selected by subsequent determination.
[0015]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a control flowchart according to the present invention.
[0016]
That is, when the slow-down switch is activated (when the slow-down switch is operated, the elevator car speed exceeds a predetermined speed), the forced deceleration is unconditionally performed.
[0017]
However, the pulse count value is calculated using both correction (pulse count 1) and non-correction (pulse count 2), and the elevator car enters the landing zone and stops. Alternatively, the calculated value of pulse count 1 is verified during the deceleration period.
[0018]
As a result of the verification, if the corrected one is correct, the corrected car position data is the corrected one (using pulse count 1), and if the corrected one is correct, that is, the slowdown switch operation itself. If it is wrong, then the one before correction is adopted (pulse count 2 is adopted).
[0019]
That is, if the pulse count 1 is correct, the value of the pulse count 2 is replaced with the value of the pulse count 1, and if the pulse count 1 is not correct, the value of the pulse count 1 is replaced with the value of the pulse count 2.
[0020]
Here, the determination as to whether the operation is correct, that is, whether the operation of the slow-down switch is a malfunction is performed from the following viewpoint, for example.
● Slowdown switch operating time (usually when it is clearly shorter than operating time)
● The number of slowdown switch operations (usually when the switch operation should be once in one run, but several switch operations are input)
● Operation order with adjacent slowdown switches (when adjacent slowdown switches always operate in the specified order and the slowdown switch does not operate in that order)
● When the operation position of the level detection switch on the floor that passed after the slowdown switch operation matches the car position data of pulse count 2)
[0021]
Therefore, in this way, forced deceleration by the operation of the slowdown switch is surely performed, and if the operation of the slowdown switch is malfunctioning, the car position information is corrected promptly. Problems caused by continuing elevator control based on the car position information can be avoided.
[0022]
【The invention's effect】
As described above, according to the present invention, even if the car position detecting device is easy to be erroneously detected, the safety device not only works reliably, but if it is found that it is erroneously detected, the original car position information is displayed. Since it can be adopted immediately, it can be promptly restored.
[Brief description of the drawings]
FIG. 1 is a flowchart showing one embodiment of the present invention.
FIG. 2 is a position detection block diagram of an elevator control device.
FIG. 3 is a layout diagram of slow-down switches.
[Explanation of symbols]
1 Pulse encoder 3 Counter 4 CPU
5 Signal contact group 7 RAM
10 Elevator car 10a Cam 11 Slow down switch

Claims (4)

In an elevator that performs forced deceleration stronger than normal deceleration when the speed at the position of the elevator car toward the end floor is higher than a predetermined value by a switch,
First detection means and second detection means for detecting the position of the elevator car by pulse counting the movement of the elevator car are provided, and when the elevator car passes a predetermined point toward the terminal floor, the first detection means is provided. A correction means for correcting the output of the first detection means, and provided with a determination means for determining the operation of the switch. If the switch is operated normally by the determination means, the correction car position by the correction means is changed to an abnormal operation. If so, the elevator control apparatus selects a car position by the second detection means. 2. The elevator control device according to claim 1, wherein the determining means determines based on a length of operation time of the switch. 2. The elevator control apparatus according to claim 1, wherein the determining means determines the operation order of a plurality of the switches. 2. The elevator control apparatus according to claim 1, wherein the discriminating means discriminates by comparing the output of the second detecting means and level position data.

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