JPH026042Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an elevator control device, and is particularly concerned with safety during startup.

[Conventional technology and problems]

Generally, elevators are required to have a comfortable ride and a small landing error, but it is also desired that the operating time between floors be short.

As one method to reduce the operating time between floors, a so-called running close method has been proposed, in which the brake is released and a speed command is given to start the car when the elevator starts, before the door is completely closed. ing.

However, although running close reduces the operating time between floors and improves the operating efficiency of the building, on the other hand, when the door closes at a slower speed than usual due to passengers coming into contact with the door or due to garbage clogging, etc. However, there was a problem in that the speed of the car increased before the door was completely closed, that is, with the door open, creating a very dangerous situation.

[Means for solving the problem] The present invention was made to solve the above problem, and its feature is that the door closing speed is detected and the door closes at the normal speed. If the door is closed, release the brake and give a speed command to the car before the door is closed, and if the door is closing at a slower speed than the normal closing speed for some reason, the door will be closed. The point is that the speed command is given later, that is, the timing of giving the speed command to the car is changed depending on the door closing speed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The figure is a circuit diagram showing an embodiment of an elevator control device according to this invention.

In the figure, 10 is an excitation coil of an electromagnetic brake (not shown), 11 is a limiting resistor for adjusting the excitation current of the excitation coil 10, and 12 is a limiter for adjusting the coil voltage when the excitation of the excitation coil 10 is cut off. Discharge resistance to prevent 13A, 13B...13N
are contacts of various safety devices (not shown); 14 is a safety circuit relay; 14a is its normally open contact; 15 is a contactor for electromagnetic brake release; 15a and 15b are its normally open contacts; 16 is a speed command relay; 17 18 is a door position detection relay, 18a is its normally open contact, and 19 is a normally open contact of a switch (not shown) that detects when the door is closed to a predetermined position in the middle of closing. A switch (not shown) that detects
20 is a normally open contact of the door closed detection relay, 20a is its normally open contact, 21 is a normally open contact of an operation command relay (not shown) that commands the operation of the car, and 22 is energized during operation of the car. The operating relay, 22b is its normally open contact, 23 is the normally closed contact of a level detection relay (not shown) which is energized when the car reaches the floor level of the stop floor and deenergized after stopping, 24 is the door closing speed. 25 is a door closing speed detection relay, 25a is its normally closed contact, 25b is also its normally open contact, P and N are the same. This is a power supply bus for control.

The operation will be explained below.

First, a case where the door is closed normally will be explained.

Now, when a call is registered and an operation command is given to the car, and the contact 21 is closed, the operation relay 22 is energized and self-maintained by the P-23-22b-22-N circuit. On the other hand, when the door starts closing operation using a circuit not shown and the door closing speed is normal, the door closing speed detection relay 25 is deenergized, and its normally closed contact 25
a is closed. When the door closes to a predetermined position in the middle of closing, contact 17 closes and relay 1
8 is energized and the contact 18a is closed. Further, during normal operation, the safety circuit relay 14 is energized and its contact 14a is closed. Therefore, if the door closes halfway, P-14a-25a-18a-22a-15(16)-
The electromagnetic brake release contactor 15 and the speed command relay 16 are energized by the N circuit, and the contacts 15a and 1
5b, the exciting coil 10 is excited and the electromagnetic brake is released, and a speed command is given, and the car starts running while the door is closed.

When the car travels and reaches the level of the desired stop floor, the contact 23 is opened and the operation relay 22 is deenergized, and the contactor 1 is opened by opening the normally open contact 22a.
5 is also deenergized, the electromagnetic brake is applied, and the car stops.

Next, a case where the door closing speed is slow for some reason will be explained.

In this case, the door closing speed detection circuit 24 is closed, the door closing speed detection relay 25 is energized, and the contact 25
A is open, and contact 25b is closed. Therefore, even if the door closes to a predetermined position and the contact 18a closes, the contactor 1
5 is not energized and the electromagnetic brake is not released. When the door completes its closing operation, the contact 19 closes and the door closed detection relay 20 is energized.
a is closed. As a result, P-14a-25a-20a-
The electromagnetic brake release contactor 15 and speed command relay 16 are energized by the circuit 22a-15(16)-N, the electromagnetic brake is released, and a speed command is given to start running the car. That is, in this case, the speed command is given after the door has been closed, and the car starts running with the door completely closed.

In addition, in the above explanation, the door closing speed can be detected by detecting the rotation speed of the door drive motor, by directly detecting the door speed, by determining the door closing speed by the current value of the door motor, or by directly detecting the door speed. Also, various methods can be considered, such as making a judgment based on the time from when the door begins to close until it reaches a predetermined position.

[Effect of idea]

According to the present invention, in normal cases, a speed command is given to the car to perform a so-called running close before the door is completely closed, and when the door closing speed is slower than usual, that is, when some abnormality is predicted, Since the speed command is given after the door is closed, it is possible to reduce the operation time between floors, and at the same time prevent the car from increasing in speed before the door is completely closed, improving operational efficiency. This has a great effect on improving safety.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of an elevator control device according to the present invention. 10... Excitation coil of electromagnetic brake, 14...
Safety circuit relay, 15... Electromagnetic brake release contactor, 16... Speed command relay, 18... Door position detection relay, 20... Door closed detection relay, 22...
...Operation relay, 24...Door closing speed detection circuit, 25
...Door closing speed detection relay.

Claims (1)

[Scope of utility model registration request] When the elevator is started, a speed command is given to the elevator before the doors are closed, and the elevator is equipped with means for detecting the door closing speed, and if it is detected that the door closing speed is slower than normal, the door closing is completed. An elevator control device characterized in that the speed command is later given to the elevator.