JPS606871B2 - elevator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to failure detection of an elevator position detection device and its control device.

Conventionally, the car position detection device detects the car position as shown in Figure 1.
``Connect the pulleys F, P and P, placed above and below with steel tape T, and then connect the pulleys (floor booley) F, P placed above and the position detection device (floor controller) F, C with a chain. Those connected by CH are
This is the most commonly used method because the location of the floor controller F'C can be freely selected.

However, if the chain CH or steel tape T in the connecting part breaks or comes off, or if the rotating part spins idly due to wear, car C and floor control F/C will no longer work together, making it impossible to control the operation of car C. It had the disadvantage of being

Conventionally, steel tape T, which is the easiest to cut, was equipped with a switch that was activated when it was cut, and the car operation was stopped immediately from the time the tape was cut, but the car stopped at a position that was off the floor surface of the floor. , passengers were trapped inside the car. In addition, they were completely defenseless against other things, and when considering disasters such as earthquakes, countermeasures were urgently needed. Furthermore, when the car stops, there is a strong need for a system that allows the car to decelerate and stop on the floor of the floor, allowing passengers in the car to get off the car. An object of the present invention is to easily detect failures of the interlocking layer that detects the car position in conjunction with the running of the car, that is, failures that are not limited to cutting of the steel tape, etc., but also include wear of rotating parts, etc. To provide a highly safe elevator control system capable of stopping a car on the floor surface of a floor.

The present invention is an elevator that detects the car position using a position detection relay that is activated by contact between a movable element and a stator that are interlocked with the car.
As shown in the example below, by simply installing a new timer, the output of the position detection relay and motor rotation detection device can be used to detect a failure in the interlocking device, as well as detect the deceleration start position of the car in the hoistway. However, when the failure is detected, it is stored and retained, and the car is stopped in response to the detection of the deceleration start position regardless of the presence or absence of a call.

Therefore, not only is fault detection very easy, but also
It is possible to detect failures including wear of the interlocking device, and it can be stopped on the floor surface, improving safety. An embodiment of the present invention is shown in FIG.

In the figure, SA and SB are position detection stators installed in the floor controller.
SA and SB are arranged so that detection can always be performed at either one of them, and SA and SB are detected alternately at regular intervals.

FA and FB are movable elements for detecting the SA and SB, and if the coupling device is normal, they also correspond to the movement of the car at a certain constant ratio. It is linked to each other.

A is a position detection relay driven by FA and SA, and A is its make contact. B is a position detection relay driven by FB and SB, and B is its make contact.

TB to T is a timer, and its operating time is set when the coupling device is normal when the position detecting stator of SA or SB is connected to FA or F.
This is set to a longer time than the maximum time required for B to pass. TA, TB are make contacts of timers TA, TB. Once either timer TA or TB operates, the ES memorizes it, thereby preventing restart of operation after stopping. PG, to PG3 are contacts of a motor rotation detection device operated by a pilot generator PG directly connected to the car driving motor. SD is a contact point of a deceleration floor detection relay that detects whether the next floor is a floor where the car should stop based on the car position obtained from the floor controller and the floor where the call occurred.

DSD is a deceleration position detection switch that has a switch section on the cage and a detection section on the shaft. Next, a case where the coupling device is normal will be explained.

When the car starts operating, PG to PG3 are closed, SA and SB are alternately contacted, and relays A and B are alternately closed and released. However, the timers TA and TB are both set so that they do not reach their operating time, so they do not operate, and therefore the relay ES does not operate either. When the car reaches the floor where the call is occurring, the fast point SD closes, giving a command that the next floor is the floor where the car should stop.

Then, when the car reaches the deceleration start position of the next floor, the DSD closes, the deceleration command device SSD operates, and the car decelerates and stops. Incidentally, since the relay ES of the drive command device ST is not operating, the break contact ES3 remains closed, and the drive command device continues to operate normally. Next, we will explain the case where the coupling device fails and the car and floor controller stop moving.

When a failure occurs, FA and FB stop progressing from that point on, and either SA or SB remains in contact. Now, to explain the case where FA and SA remain in contact, relay A remains closed, and after a certain period of time, timer TA operates. As a result, relay ES operates and is self-maintained by ES. SD does not work because the floor controller does not progress, but ES2
Since the car is closed, when the car reaches the deceleration start position of the floor closest to it in the direction of travel, the DSD is closed, which activates the deceleration command device SSD, and the car decelerates and stops.

When the car stops, P○,~3 opens, and relay ES
remains operating, so its break contact E
S3 remains open, and as a result, the operation command device ST is cut off and no further operation is possible.

As explained above, when the coupling device fails, the failure is detected within a certain period of time (approximately 1 to 3 seconds), the car is decelerated to the nearest floor, and subsequent operations are suspended.

According to the present invention, it is possible to extremely easily detect failures in the lotus transport layer for position detection, including wear and tear, and it is also possible to decelerate and stop without trapping passengers in the car, making it safe. It is possible to realize an elevator with high performance.

[Brief explanation of the drawing]

Fig. 1 is a mechanism diagram showing the driving principle of an elevator position detection device. Fig. 2 is a circuit diagram showing an embodiment of the present invention. SA, SB... Stator for position detection of floor controller , FFB... Floor controller position detection mover, A, B... Position detection relay, T
A, TB...Timer for failure detection, ES...Relay for preventing restart, PG...Rotation detection device contact for car drive motor F, CTR...Floor controller, CH・・・・Chain, F・P・・・・
Floor pulley, P/P...bit pulley, T...steel tape, C...basket. Tsutomu 1 drawing and 2 drawings

Claims (1)

[Claims] 1. An elevator car that travels between multiple floors, a movable element that is driven via a device that interlocks with the movement of this car, a plurality of position detection stators arranged opposite to this movable element, and a plurality of position detection stators for each stator. and a position detection relay that is provided at the movable element and operates while the movable element is in contact with the elevator car, and the position detection relay is used to detect the position of the elevator car. A timer set as above, an interlocking fault memory means for detecting and storing a state in which the position detection relay is operating for more than the timer period while the elevator driving electric motor is rotating, and a fault storage means in the hoistway of the elevator. A control device for an elevator comprising: a device for detecting a deceleration start position of the car; and a deceleration and stop device for stopping the car when the deceleration start position detection device is activated while the storage means is storing an interlocking fault.