JPH0240593B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an elevator door control device.

Figure 1 shows a schematic diagram of an elevator door and its driving machine. 1 is the elevator door, 2 is a horizontally arranged guide rail, and the door 1 is connected to the guide rail 2 via a roller 3. It is suspended so that it can be moved. 4 is a crank arm for opening and closing the door, one end of which is connected to the door 1, and the other end connected to the pulley 5.
The crankshaft 5a is connected to the crankshaft 5a. 6
1 is a door drive motor, and a belt 8 for transmitting rotation is wound between a drive pulley 7 attached to its rotating shaft and the driven pulley 5.

In the door device with the above configuration, when the motor 6 rotates forward or backward, the crank arm 4 is rotated as the pulley 5 rotates, and at the same time, the door 1 is moved along the guide rail 2 in the opening or closing direction. Ru.
At this time, the door 1 is controlled according to a predetermined position and speed pattern.

FIGS. 2 to 4 show this kind of conventional door control device, where 10 is a tachometer generator that detects the speed of the motor 6, 11 is a disc attached to the crankshaft 5a; As shown in FIG. 3, a plurality of light-transmitting slits 11a are formed with different diameters to create the position and speed pattern of the door 1, and on one side of the disk 11, light emitting diodes are arranged opposite to each of the slits 11a. 12 are arranged in the radial direction of the disk 11, and on the other side of the disk 11, phototransistors 13 facing each of the light emitting diodes 12 are arranged.

In FIG. 4, reference numeral 14 denotes a generating circuit that generates a door position/speed command signal, which responds to the position of the door by switching a phototransistor 13 using light transmitted through the slit 11a as the disc 11 rotates. This speed command signal and the output signal from the tachometer generator 10 are added to a comparator 15, and the difference signal obtained by the comparator 15 is sent to the motor via an amplifier 16. 6, the speed is controlled in a sine curve shape while accelerating and decelerating according to the position and speed pattern, and the door 1 is opened and closed.

However, with conventional door control devices such as the one mentioned above,
In order to generate the position and speed pattern of the door 1, a large number of light emitting diodes and phototransistors are required, as well as a motor, that is, a tachometer generator to detect the speed of the door and return the speed. It has the drawbacks of being complicated and increasing costs.

This invention solves the above-mentioned drawbacks, and is an elevator door control device that simplifies the means for sending out speed commands according to the door position, and also eliminates the conventional tachogenerator to reduce costs. is to provide.

Hereinafter, specific embodiments of the present invention will be described based on the drawings.

5 to 7 show an example of the door control device of the present invention, and the same reference numerals as in FIG. 2 represent the same parts. Rotated crankshaft 5a
A pattern 18 for generating a signal corresponding to the position speed of the door to be opened and closed, that is, a pulse number inversely proportional to the door position speed and using it as a speed command, is mounted on the disk 17 attached to the disk 17.
is recorded in advance, and this pattern 18 is the sixth pattern.
As shown in the figure, it is formed of transparent slits 18a arranged along the circumferential direction of the disk 17, and the spacing between the slits 18a is largest at the center of the arrangement and decreases toward both ends. Reference numeral 19 denotes a detector for reading the pattern 18, which is composed of one light emitting diode 20 and one phototransistor 21, and turns on the phototransistor 20 by the light transmitted from the light emitting diode 19 through the slit 18a.
By turning it off, the pattern 18 is converted into a pulse frequency.

The pulse signal sent from the phototransistor 20 is transmitted to the frequency-voltage converter 2 as shown in FIG.
2 is converted into a voltage and applied as a feedback speed signal to a comparator 23, and a command voltage is supplied to the comparator 23 from a command voltage generator 24, and the command voltage obtained by this comparator 23 is The differential voltage is supplied to the motor 6 via the amplifier 25, and the speed of the motor 6 is controlled according to a speed command pattern.

In the door control device having the above configuration, when the motor 6 is started by a command to open or close the elevator door,
The disk 17 also rotates at the same time as the door begins its opening or closing operation. At this time, if the detector 19 starts reading the pattern 18 of the disk 17 from one end with the smallest slit interval as the disk 17 rotates, the number of ON-OFF times of the phototransistor 21 due to the slit pattern, i.e. The number of generated pulses is the highest, decreases toward the center of the pattern 18, and increases again toward the other end of the pattern 18. Therefore, the output voltage of the converter 22 that converts this pulse frequency into a voltage also changes in proportion to the number of pulses from the detector 19, and the output voltage is applied to the comparator 23 as a feedback speed. Comparator 23
Now, compare the output voltage from the frequency-voltage converter 22 and the command voltage from the command voltage generator 24,
After the differential voltage is amplified by the amplifier 25, the motor 6
, the speed of the motor 6 is controlled along the position and speed pattern 18. That is, the motor speed is accelerated as the slit pattern goes from the narrower spacing to the wider spacing, and the motor speed is decreased as the slit pattern goes from the wider spacing to the narrower spacing, thereby opening or closing the door. It makes it work.

In the embodiment described above, the detector for reading the door position and speed pattern of the disc 17 is simpler than in the conventional system, and the conventional tachogenerator is not required, so the structure of the door control device can be simplified. , the cost can be further reduced.

In the above embodiment, the position and velocity pattern of the door formed on the disc 17 is formed by slits, but it may also be formed by small holes or printing. Furthermore, the device that records the position and velocity pattern of the door is not limited to the disk 17 attached to the crankshaft, but can also be a long member, for example, that can be attached to the guide rail of the door to directly detect the position of the door itself. You can do it like this.

As described above, according to the present invention, a member records a pattern for extracting a pulse signal corresponding to the position and traveling speed of the door, a detecting section detects the pattern of this member, and one of the above-mentioned member and the detecting section. By operating in synchronization with the door, the output signal obtained from the detection unit is compared with the command value, and the motor is controlled by the difference output, and the pattern of the above members is set at narrow intervals near the open and closed positions of the door. , the middle position was composed of widely spaced signs, so
By simplifying the configuration of the device, the speed of the door can be controlled from low speed to high speed to low speed.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of an elevator door drive mechanism, Fig. 2 is a configuration diagram of main parts showing a conventional door control device, Fig. 3 is a plan view of the disk in Fig. 2, and Fig. 4
5 is a block diagram of a conventional door control circuit, FIG. 5 is a configuration diagram of the main parts of the door control device of the present invention, and FIG. 6 is a plan view showing an example of the disk (member) in FIG. 5.
FIG. 7 is a block diagram of the door control circuit of the present invention. 1... Door, 2... Guide rail, 4... Crank arm, 5, 7... Pulley, 6... Motor, 8... Belt,
17... Disk (member), 18... Door position speed pattern,
18a...Slit (label), 19...Detector, 22
...Frequency-voltage converter, 23...Comparator, 24...Command voltage generator. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1 Either a member in which a pattern is recorded to output a pulse signal corresponding to the door position and travel speed, or a detection unit that detects the pattern of this member and sends a signal according to the door position, is synchronized with the door. In a device that controls a door drive motor by comparing a signal sent from the detection unit with a command value and using the difference signal, the pattern of the members is arranged between the open position and the closed position of the door. 1. An elevator door control device comprising a plurality of signs, the distance between these signs being narrow near the closed position and near the open position, and wide at an intermediate position.