JPH04149609A - Gate opening/closing device - Google Patents

Abstract

PURPOSE:To prevent the deterioration of the lifetime of a rope and also to prevent the break of the rope by outputting the torque value set previously in response to the gate position and controlling the torque of the driving force of a motor based on the torque value of the motor and the set torque value. CONSTITUTION:A pulse transmitter 6 generates the pulse signals in response to the revolution of a DC motor 2 which drives a rope mechanism 10 with revolution of a speed reducer 3 and opens/closes a gate 12. A shift value control circuit 7 counts the pulse signals to detect the position of the gate 12 and also selects a set torque against the position of the gate 12 to supply it to a stall torque control circuit 9. The circuit 9 compares the input current value supplied from a current detector 8 with the current value corresponding to the set torque supplied from the circuit 7 and produces a speed command signal needed to reduce the input current value less than the set torque current value. This command signal is supplied to a speed control circuit 5. Thus it is possible to prevent the excessive force applied to a rope, etc., and to evade the deterioration of the rope lifetime and the break of the rope.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a gate opening/closing device that opens and closes a gate using a speed reducer, a rope mechanism, or the like.

(Prior art) Conventionally, 313
The device shown in the figure is known.

The gate opening/closing device shown in this figure includes a thyristor Leonard device 1t101, a DC electric motor 11102, and a speed reducer 103.
, a tachometer generator 104 , and a speed control circuit 105 , and drives a DC motor 102 based on a speed reference signal to open and close a gate 107 of a gate mechanism 106 .

The thyristor Leonard device I 1.01 generates a drive current having a magnitude based on the control fIII signal supplied from the speed control circuit 105 and supplies it to the DC motor 102 .

The DC motor 102 is the thyristor Leonard device! 1
01 to generate a driving force, and this driving force rotationally drives the speed reducer 103 to drive the rope mechanism 108 and open/close the gate 107.

Further, the 5-tachometer generator]04 detects the number of rotations of the DC motor 102, generates a rotation speed detection signal, and transmits the signal to the speed a.
is supplied to the control circuit 105.

The speed control circuit 105 generates a control signal necessary to match the speed indicated by the rotation speed detection signal supplied from the rotation speed generator ml 04 with the speed indicated by the speed reference signal, and controls the thyristor Leonard device 1
The value of the drive current output from 01 is controlled by s.

(Problem to be solved by the invention!!l) However, such a conventional gate opening/closing device has the following problems.

That is, in the gate opening/closing device shown in FIG.
When the gate 107 of 06 is opened and closed and the gate 107 reaches the stop position (open position or t=closed position), this is detected by a stop position detection limit switch (not shown). The operation of the speed control circuit 105 is stopped and the DC motor 102 is stopped.

However, in such a gate machine WR106, the torque when the gate machine 41[06 is moved from a stopped state to an operating state is much larger than the torque when the gate mechanism 106 is normally operated. Even if a malfunction occurs in the speed reducer 103, the rope machine side 108, etc. during operation, the DC motor 102 will continue to operate as long as the torque is less than the torque required to shift from the stopped state to the operating state. As a result, an excessive force is applied to the rope of the rope mechanism 108 for a long period of time, which may shorten the life of the rope or cause it to break.

In view of the above circumstances, the present invention prevents excessive force from being applied to the rope even if a malfunction occurs in the reducer or rope mechanism, thereby preventing the rope from shortening its lifespan or breaking. The purpose is to provide a gate opening/closing device that can

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, a gate opening/closing device according to the present invention supplies driving force obtained by an electric motor to a gate mechanism via a rope mechanism to open/close a gate. The apparatus includes a gate position detection section that detects the position of the gate, a torque setting section that outputs a set torque value that is preset according to the gate position detected by the gate position detection section, and a torque setting section that outputs a torque value that is set in advance according to the gate position detected by the gate position detection section. a torque detection unit that measures the torque of the driving force generated by the electric motor; and a driving force obtained by the electric motor based on the torque value of the electric motor measured by the torque detection unit and the set torque value output from the torque setting unit. The present invention is characterized by comprising a torque control section that controls the torque of the motor.

(Function) In the above configuration, the torque setting section outputs a preset torque value according to the gate position detected by the gate position detection section, and the driving force is output from the electric motor by the torque detection section. The torque of the driving force outputted from the electric motor is controlled by a torque control section based on the measurement result and the set torque outputted from the torque setting section.

(Embodiment) Figure wi is a block diagram showing an embodiment of the gate opening/closing device according to the present invention.

The gate opening/closing device shown in this figure is a thyristor Leonard device! 1, a DC motor 2, and a speed reducer 3.

It is equipped with a tachometer generator 4, a speed control circuit 5, a pulse transmitter 6, a movement amount control circuit 7, a current detector 8, and a stall torque control circuit 9. While controlling the torque of the driving force output from the DC motor 2 according to the driving force, the gate machine [1
Open and close gate 2.

Said thyristor Leonard tribe! 1- generates a drive current having a thickness based on the control signal supplied from the speed control circuit 5, and supplies this to the DC motor 2.

The DC motor 2 generates a driving force using the driving current supplied from the thyristor Leonard device 1, and
This driving force rotates the speed reducer 3, drives the rope mechanism 10, and opens and closes the gate 12.

Further, the tachometer generator 4 generates a voltage signal according to the rotation speed of the DC motor 2 and supplies it to the speed control circuit 5 6 Further, the pulse generator 6 generates a voltage signal according to the rotation speed of the DC motor 2 A pulse signal is generated and supplied to the movement amount control circuit 7.

The movement amount control circuit 7 is equipped with a counter for counting the pulse signals output from the pulse transmitter 6, a table in which the relationship between each position of the gate 12 and the set torque is registered in advance, and the like. The pulse signal supplied from #6 is counted to detect the position of the gate 12, and the set torque for the position of the gate 12 is selected and supplied to the stall torque control circuit 9.

Also, current detection! i) 8 is the value of the current supplied to the thyristor Leonard device 1, i.e. the DC motor 2;
The current value (input current value) supplied to the stall torque control circuit 9 is detected and supplied to the stall torque control circuit 9.

The stall torque siq stirring circuit 9 generates a current value (setting torque current M
), generates a speed command signal necessary to make the input current value smaller than the set torque current value, and supplies this to the speed control circuit 5.

The speed control port jl15 outputs a control signal necessary to match the speed indicated by the voltage signal supplied from the rotational speed generator 4 and the speed indicated by the speed command signal supplied from the stall torque control circuit 9. The value of the drive current generated and output from the thyristor Leonard device 1 is controlled.

Next, the operation of this embodiment will be explained with reference to FIG.

First, from the speed control circuit 5 to the gate 12 of the gate mechanism 11
If the control signal necessary for opening and closing is output and the drive current is output from the thyristor Leonard device II,
This drive current drives the DC motor 2 to drive the reducer 3, and the gate 12 of the gate mechanism 11 is driven via the rope mechanism 10 connected to the output shaft of the reducer 3. Opening/closing begins.

At this time, a pulse signal corresponding to the rotation of the DC motor 2 is outputted from a pulse transmitter 6 connected to the DC motor 2, and this is counted by the movement amount control circuit 7 to detect the position of the gate 12. At the same time, a preset torque set for this position is selected and supplied to the stall torque control ports 8 and 9.

Then, the stall torque control circuit 9 compares the current value indicated by the set torque with the input current value detected by the current detector 8 to make the input current value smaller than the set torque current value. A necessary speed command signal is generated and supplied to the speed control circuit 5.

This allows the speed control circuit 5 to match the speed indicated by the voltage signal supplied from the rotational speed generator 4 with the speed indicated by the speed command signal supplied from the stall torque '11#11 circuit 9. The value of the drive current output from the thyristor Leonard device 1 is controlled by generating a control signal necessary for the thyristor Leonard device 1.

As a result, while the torque of the driving force output from the DC electric motor 1[2 is limited to below the set torque preset for the position of the gate 12, the speed reducer 3 and the rope mechanism 10 are controlled by the driving force. driven, gate 12
is opened and closed.

In this way, in this embodiment, the speed reducer 3 and the rope mechanism are controlled while limiting the torque of the driving force output from the DC motor 2 to s1 so that it is below the set torque that is preset according to the position of the gate 12. 10, it is possible to prevent excessive force from being applied to the rope etc. even if a problem occurs in the reducer 3, the rope mechanism 10, etc., and this can prevent the life of the rope from being shortened or This can prevent cutting.

FIG. 2 is a block diagram showing another embodiment of the gate opening/closing device according to the present invention. In this figure, parts corresponding to those in FIG. 1 are given the same reference numerals.

The gate opening/closing device shown in this figure is different from the gate opening/closing device shown in FIG. The stall torque control circuit 9 compares the set torque with the torque detected by the torque detection device 13, and calculates the set torque from the set torque. The value of the speed command signal is controlled so that the torque of the driving force output from the DC motor 2 is reduced.

Even with this configuration, even if a malfunction occurs in the reducer 3, the rope mechanism 10, etc., excessive force is prevented from being applied to the rope, etc., as in the above-described embodiment, and the service life of the rope is reduced. This can prevent the device from being damaged or cut.

Furthermore, in each of the embodiments described above, the DC motor 2 is used to drive the reducer 3 and the rope mechanism 10, but the AC motor is used to drive the reducer 3 and the rope mechanism 1.
0 may be driven.

〔Effect of the invention〕

As explained above, according to the present invention, even if a problem occurs in the reducer or rope mechanism, excessive force is prevented from being applied to the rope, thereby reducing the lifespan of the rope or causing it to break. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of a gate opening/closing device according to the present invention, IJ! FIG. 2 is a block diagram showing another embodiment of the gate opening/closing device according to the present invention, and FIG. 113 is a block diagram showing an example of a conventionally known gate opening/closing device. 1... Thyristor Leonard device 2... Electric motor (DC motor) 6... Gate position detection m (pulse transmitter) 7... Torque setting section (travel amount control circuit) 8-... Torque detection section (
current detector) 9...torque control section (stall torque control circuit) 10
...Rope mechanism 11...-Gate mechanism 12...Gate

Claims (1)

[Claims] (1) In a gate opening/closing device that opens and closes a gate by supplying driving force obtained by an electric motor to the gate mechanism via a rope mechanism, the gate position detection section detects the position of the gate; a torque setting section that outputs a set torque value that is preset according to the detected gate position; a torque detection section that measures the torque of the driving force obtained by the electric motor; and a torque detection section that measures the torque of the driving force obtained by the electric motor. A gate opening/closing device comprising: a torque control section that controls the torque of a driving force obtained by the electric motor based on a torque value of the electric motor and a set torque value output from the torque setting section.