JPH07315699A - Light control device for lighting in elevator car - Google Patents

Abstract

PURPOSE:To automatically change illuminance and improve an energing saving effect by providing a dimming device for changing the light intensity of illumination in a cage according to the position of an elevator and the presence of a passenger. CONSTITUTION:A pulse signal of a rotary encoder 6 is sent to a calculating unit 71 consisting of a microcomputer in a control unit 7. The control of the position of the elevator and the running sequence of a cage are performed in the calculating unit 71. The illuminance in the cage is reduced by the traveling of the elevator and the energy saving effect in a cage can be improved. Elevator speed is detected by the signal of the rotary encoder 6 and the calculating unit generates an illuminance command according to the position of the elevator. The illuminance command is converted to an analog signal through a D/A converter 72 to be inputted to a gate circuit 73 of a thyristor 74 for phase control so that the voltage of a luminaire 12 is changed and dimming can be adjusted through a movable cable 8.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a lighting device in an elevator car.

[0002]

2. Description of the Related Art In a conventional apparatus, when no call is made for a predetermined period of time, it is possible to automatically turn off the light in the car to save unnecessary power.

[0003]

In the conventional device, the illumination in the car is automatically turned off by the arithmetic processing of a predetermined time by the microcomputer after the call disappears. However, if the illuminance inside the car was turned off while the elevator was operating, it would be completely dark, so it was not possible to save energy during operation.

An object of the present invention is to provide a device capable of saving energy during operation by automatically adjusting the illuminance in the car depending on the position of the elevator and the presence or absence of passengers.

[0005]

As a means for detecting the position of an elevator, a well-known rotary encoder is provided directly connected to the shaft of a motor, and this position signal is processed by a microcomputer to perform a digital / analog converter (hereinafter D). / A
Via a converter) and a dimming device consisting of thyristors and transistors according to its analog output,
It was used as a means to change the illuminance of the lighting equipment in the car.

[0006]

The position signal of the elevator can be detected by integrating the output pulses of the rotary encoder directly connected to the motor shaft. Therefore, if the thyristor of the light control device is controlled so that the illuminance becomes brighter as the lighting inside the car is stopped while the elevator is steadily running, the voltage applied to the lighting fixture can be adjusted to control the light.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a system diagram of the present invention. Although this figure shows a rope type elevator, it may be a hydraulic elevator. The car 1 is connected to the counterweight 2 by a rope 4, and is arranged in a temple-like shape via the hoist 3. The hoisting machine 3 is equipped with a motor 5 and a rotary encoder 6 directly connected to the motor shaft. This rotary encoder 6 can detect the number of rotations of the motor, that is, the elevator speed, and can detect it as position information by integrating its output pulse signal. On the other hand, the car 1 has a car interior 10 and can detect passengers in the car by an underfloor weighing device 11. A lighting fixture 12 is arranged on the ceiling. Further, a door machine device 9 for controlling opening / closing of a car door (not shown) is installed on the car, and power is supplied to the door machine device 9 and the lighting fixture 12 by a movable cable 8 dedicated to the elevator. It is connected to a control device 7 that controls operation control.

FIG. 1 shows a block diagram of the present invention. As described above, the pulse signal of the rotary encoder 6 is sent to the arithmetic unit 71 which is a microcomputer in the control unit 7, and the arithmetic unit 71 controls the position of the elevator and the operation sequence of the car.

Now, consider the case where the illumination in the car is variable according to the position of the elevator. The traveling of the elevator can reduce the illuminance of the car and increase the energy saving effect in the car. The illuminance at this time is lowered to such an extent that the passenger's face in the car can be recognized. The speed is detected by the signal from the rotary encoder 6, the illuminance command corresponding to the position is output by the calculation unit 71, and the D / A converter 72 is output.
The voltage of the lighting fixture 12 can be changed by controlling the phase by inputting it to the gate circuit 73 of the thyristor 74 via the moving cable 8 to control the light. In this example, the thyristor device 74 and the gate circuit 73 are installed in the control device 7, but they may be installed in the upper part of the car.

Further, when the weighing device 11 detects that there is no passenger in the car, it becomes easy to turn off the elevator while the vehicle is running or stopped. This further improves the energy saving effect.

[0011]

According to the present invention, the illuminance can be automatically changed depending on the position of the elevator and the presence / absence of passengers, and the energy saving effect is increased.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a system diagram of an embodiment of the present invention.

[Explanation of symbols]

1 ... Car, 6 ... Rotary encoder, 7 ... Control device,
11 ... Scale device, 12 ... Lighting device, 71 ... Arithmetic unit, 72 ...
D / A converter, 74 ... Thyristor device.

Claims (1)

[Claims] 1. A lighting means capable of dimming the brightness of an elevator car traveling on a plurality of floors and the inside of a car, an elevator position detecting means, and means for detecting the presence or absence of passengers.
An elevator car lighting system having a control device for controlling an elevator, comprising a light control device for changing a light intensity of the illumination light in the car depending on a position of the elevator and presence / absence of passengers. Dimmer.