JPH0941851A - Opening/closing control device for shutter or automatic door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely set the upper limit position or the lower limit position of a shutter or an automatic door with a simple structure at low cost. SOLUTION: A motor 30 is driven by a control circuit section based on the setting actions of the upper limit position and the lower limit position of a shutter or an automatic door, the rotation angles of an output shaft 36 when the shutter or the automatic door is stopped at the upper limit position and the lower limit position based on the outputs of a potentiometer rotated in the rotation range of 360 deg. are obtained and stored in a memory. The motor 30 is controlled based on the rotation angles set at the upper limit position and the lower limit position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter or an automatic door opening / closing control device for shutting off the electric power supplied to a motor at the opening / closing limit position to stop the shutter or the automatic door.

[0002]

2. Description of the Related Art As a conventional shutter or automatic door opening / closing control device, for example, when a shutter reaches an upper limit position of an opening operation or a lower limit position of a closing operation, a limit device stops the movement of the shutter. This is proposed in Japanese Utility Model Laid-Open No. 5-40598.

In this opening / closing control device, the motor is driven by simultaneously operating the stop switch and the close switch, and the solenoid is excited by the setting signal output from the signal processing circuit when the shutter stops at the lower limit position.
By setting the shutter zero by the solenoid, the lower limit position of the shutter is associated with the count value of the counter, and in the drive control of the shutter thereafter, the motor and the like are controlled so as to automatically stop the shutter at the set lower limit position. are doing.

[0004]

Since the conventional shutter or automatic door opening / closing control device is configured as described above, a mechanical analog counter is used as the counter to set the lower limit position first. Since the solenoid (plunger) mechanism is used for this preset operation, the configuration is complicated and the price is high, and the solenoid, switch circuit and There is a problem that it is uneconomical to provide electric wiring.

The above-mentioned counter displays "99" for each digit.
Since the switch signal is output by switching on or off when changing from 9 "to" 000 ", only one point as the lower limit position of the shutter can be detected, that is, designation up to" 999 ". However, there is a problem in that the switch cannot be operated with an arbitrary count number and the shutter cannot be stopped or held at a desired opening position (for example, ventilation opening, daylight opening).

Further, the position of the shutter may be detected by using the resistance value of a variable resistor interlocked with the shutter, or by operating a limit switch with a movable piece that moves on a screw according to the movement amount of the shutter. However, because there are restrictions on the rotation operating area of the operating shaft of a normal variable resistor and the amount of movement of the movable piece, the excessive rotation of the motor and incorrect position setting may cause the variable resistor or movable piece to move. There were problems such as damage to the.

The present invention has been made by paying attention to the above-mentioned conventional problems, and a large and expensive preset mechanism such as a plunger is used for preset operation for setting a lower limit position of a shutter or an automatic door. It is possible to avoid use, and even after the power is restored after a power failure, the upper and lower positions of the shutter or automatic door can be detected with high accuracy, and the shutter or automatic door can be set to any opening and closing amount without causing any failure. The objective is to obtain a shutter or automatic door opening / closing control device.

[0008]

A shutter or automatic door opening / closing control device according to the present invention decelerates the rotation of an output shaft within one rotation of the rotation of a motor with respect to the amount of elevation required for the shutter or the automatic door. A reduction gear, a slider attached to the output shaft of the reduction gear, and an endless circular thick film resistance portion on which the slider slides, and the sliding contact of the slider with the thick film resistance portion. The potentiometer for detecting the potential change between positions and the rotation angle of the output shaft are 180
And a switch unit whose switch state changes at a boundary, and the control circuit unit drives the motor based on the setting operation of the upper limit position or the lower limit position of the shutter or the automatic door, and the shutter or The rotation angle of the output shaft when the automatic door stops at the upper limit position or the lower limit position is obtained and stored, and the motor is controlled with the rotation angle as the set upper limit position or the lower limit position. .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1 and 2 are a front view and a side view showing the configuration of a shutter opening / closing control device according to the present invention. In the drawings, 30 is a motor as a DC motor, and 31 is a gearhead connected to the motor 30.

Reference numeral 32 denotes an output shaft of the gearhead 31. The output shaft 32 is provided with a sprocket (not shown) for driving a chain that suspends a plurality of shutters.

Further, 33 is a speed reducer for reducing the rotational speed of the motor 30, and 34 is a position detecting section which is connected to the speed reducer 33 and detects the rotational position of the output shaft of the speed reducer.

Here, the reduction gear 33 has a reduction ratio with respect to the rotational speed of the motor so that the reduction gear 33 enters within one rotation of the output shaft of the position detection unit 34 with respect to the amount of elevation required for the shutter. There is.

The position detecting unit 34 is provided on a bottomed cylindrical body 35 having a U-shaped cross section as a whole, and an output shaft 36 of the speed reducer 33, which is a part of a potentiometer, penetrates through the central portion of the position detecting unit 34. are doing.

At the tip of the output shaft 36, long and short sliders 37 and 38 are fixed by screws 39. The sliders 37 and 38 are formed integrally or separately, and have contact points 37a and 38a at their tips.

Reference numeral 40 denotes a disk-shaped insulating substrate mounted in the opening of the bottomed cylindrical body 35, and each slider 37,
A ring-shaped (endless) thick film resistance portion 41 is formed by printing or the like on the surface side facing 38, and this constitutes a potentiometer P together with the slider 37.

Further, the thick film resistor portion 41 has one point (one place) as a lead wire lead-out portion 42 for taking out a potential change between the thick film resistor portion 41 and the slider 37 to the outside. The contacts of the slider 37 slidably contact the thick film resistance portion 41.

Reference numeral 43 denotes a conductor portion provided on the insulating substrate 40 inside the thick film resistor portion 41 by printing or the like, and one end portion of the conductor portion 43 is opposed to the lead wire lead-out portion 42 (at the same angular position). And the other end is 180
The conductor portion 43 has an arc shape as a whole.

Reference numeral 44 denotes a lead wire lead-out portion provided on the conductor portion 43 for taking out a change in the potential with respect to the slider 38 to the outside. In addition, the conductor portion 43 is the slider 3
A switch section S is configured together with 8.

Therefore, in the potentiometer P, the contact 37a of the slider 37 can be slidably contacted on the thick film resistance portion 41 in any angular range of 360 degrees and in any of the left and right directions. 37 and lead wire take-out section 42
The resistance value between them changes as shown in FIG.

Further, in the switch S, the contact point 38a of the slider 38 can be slidably contacted on the arc-shaped conductor portion 43 in any region of 360 degrees and in any of left and right directions.
The potential change obtained by one rotation (360 degrees) of the slider 38, that is, the switch state changes as shown in FIG. Therefore, the rotational positions of the sliders 37, 38, that is, the rotational positions of the output shaft 36 can be accurately detected within the entire 360 ° range in accordance with the change in the resistance value and the switch state.

That is, by changing the output value of the switch section S at a position 180 degrees from the lead wire lead-out section 42 of the thick film resistor section 41, the potentiometer P 36 is changed.
Any position detection in the 0 degree angle region can be sufficiently performed.

FIG. 4 is a block connection diagram showing the shutter opening / closing control device. In FIG. 4, 1 is a power source connected to a commercial power source, and 2 is a power source from the power source 1 for driving the shutter. The control circuit unit controls the motor 30.

Further, 3 is a lowering switch for instructing the lowering of the shutter, 4 is a stop switch for instructing stop, and 5 is a stop switch.
Is a raising switch for instructing raising, and 6 is a setting switch for operating the lowering switch 3 or the raising switch 5 at the same time to set the upper limit position and the lower limit position of the shutter.

The descending switch 3, the stop switch 4, the raising switch 5 and the setting switch 6 each input the respective command signals to the control circuit section 2.

Reference numeral 7 is an A / D converter for digitally converting the output of the potentiometer P constituting the position detecting section 34 and inputting it to the control circuit section 2. Reference numeral 8 is a control output from the control circuit section 2. , A motor driver for driving the motor 30.

Next, the operation will be described. First, the upper and lower limit positions of the shutter are set for automatic opening and closing. That is, when setting the upper limit position of the shutter, the raising switch 5 and the setting switch 6 are simultaneously pressed.

The raising switch 5 and the setting switch 6
In response to the ON signal, the control circuit unit 2 outputs a control signal for driving the shutter in the upward direction to the motor driver 8, which causes the motor 30 to start driving in the same direction.

The rotation of the motor 30 is transmitted to the output shaft 32 via the gearhead 31, and the shutter is pulled up by a sprocket (not shown) attached to the output shaft 32. Then, when the shutter reaches the upper limit position, it cannot be further raised and the shutter stops.

On the other hand, when the shutter is raised, the speed reducer 33 decelerates the rotation of the motor 30 and transmits it to the other output shaft 36. Therefore, the respective sliders 37, 38 of the potentiometer P and the switch section S rotate together, and the contact 37a of the slider 37 changes the position (rotation angle) on the thick film resistance section 41 to change the position as shown in FIG. ), A potential signal corresponding to the resistance value corresponding to the position is output between the slider 37 and the lead wire takeout portion 42.

The slider 38 of the switch S has a contact point 38.
a is located at a predetermined position of the conductor portion 43 or the insulating portion without the conductor portion 43, and the switch state signal as shown in FIG. 3A is output according to the position.

Therefore, when the motor 30 is rotating, two kinds of switch signals from the potentiometer P and the switch section S are input to the control circuit section 2 to calculate a shutter position signal as the rotational position of the output shaft 36. ing.

When the shutter is stopped based on the simultaneous operation of the raising switch 5 and the setting switch 6, the control circuit unit 2 stores the calculated shutter position signal in a memory (not shown) as the upper limit position of the shutter, The driving of the motor 30 is stopped and the setting of the upper limit position is completed.

Next, when the lower limit position of the shutter is set, the lowering switch 3 and the setting switch 6 are simultaneously pressed. As a result, the control circuit unit 2 outputs a signal for driving the shutter in the descending direction to the motor driver 8.
Therefore, the motor 30 starts to be driven in the same direction.

As a result, the shutter is pulled down and stops when it reaches the lowered position. For this reason, the control circuit unit 2 stores the shutter position signal calculated based on the outputs of the potentiometer P and the switch unit S in the memory as the lower limit position of the shutter, as in the case of the shutter rising, and The driving of the motor 30 is stopped, and the setting of the lower limit position of the shutter is completed.

Next, when opening the shutter in the closed state, the raising switch 5 is pushed. As a result, the control circuit section 2 receives the rising instruction signal and outputs the rising control signal to the motor driver 8. Therefore, the motor driver 8 drives the motor 30 in the ascending direction of the shutter.

On the other hand, the rotational position of the motor 30 is monitored by the potentiometer P and the switch unit S, and the control circuit unit 2 drives the motor 30 until the rotational position reaches the upper limit position stored in the memory, When the upper limit position is reached, the motor 30 is stopped and the lift of the shutter is stopped.

When the shutter in the open state is closed, the lowering switch 3 may be pressed. As a result, the control circuit unit 2 outputs a descending control signal to the motor driver 8, and the motor 30 is driven in the descending direction of the shutter.

Also at this time, the rotational position of the motor 30 is monitored by the potentiometer P and the switch S, and the control circuit unit 2 drives the motor 30 until the rotational position reaches the lower limit position stored in the memory. continue.

When the rotational position reaches the stored lower limit position, the motor 30 is automatically stopped,
Therefore, the shutter also stops descending at its lower limit position.

Therefore, in such an embodiment, the setting operation of the upper limit position and the lower limit position of the shutter is
It is not necessary to separately prepare a mechanism such as an analog counter or a plunger for presetting the analog counter, which improves economic efficiency. In addition, the use of a 360-degree rotary potentiometer allows the control circuit to control the upper and lower limit positions. It can be set easily and quickly over a wide range.

The positions of the sliders 37 and 38 in the potentiometer P and the switch section S are 360.
Since it is configured to be constantly monitored over a wide area of more than 1 degree, compared to the case where an analog counter that can detect only one point is used, the desired opening degree such as ventilation opening instruction or lighting opening instruction from the outside By inputting a command signal for opening and closing the shutter, the shutter can be driven and controlled to an arbitrary opening under the control of the control circuit unit 2.

Further, even if the circuit power supply of the switching control device has a power failure, the upper and lower limit set values are stored in a non-volatile memory so that they are continuously stored in that memory even after the power is restored. The opening and closing control of the shutter can be safely re-executed with the set value.

Since the potentiometer P can rotate in any direction in a rotation angle range of 360 degrees or more, unlike a conventional resistor that can rotate only in a constant rotation angle range, position detection can be performed. The slider 37 will not be damaged by excessive rotation at this time.

Although the opening / closing control of the shutter has been described in the above embodiment, it can be similarly applied to the opening / closing control of the automatic door, and the same effect as that of the above embodiment can be obtained.

[0045]

As described above, according to the first aspect of the present invention, the control circuit section is caused to drive the motor based on the setting operation of the upper limit position or the lower limit position of the shutter or the automatic door, and the rotation range of 360 degrees. The rotation angle of the output shaft when the shutter or automatic door stops at the upper limit position or the lower limit position is determined based on the output of the potentiometer and the switch that rotates at, and is stored in the memory. Since the motor is configured to be controlled as the lower limit position, it is possible to avoid using a large and expensive preset mechanism such as a plunger for preset operation of setting the upper limit position and the lower limit position of the shutter or the automatic door, Even after the power is restored after a power failure, the upper and lower limits of the shutter or automatic door can be detected with high accuracy. The effect of which the shutter or automatic door without causing a failure can be set to any of the opening and closing amount is obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of a shutter or automatic door opening / closing control device according to an embodiment of the present invention.

FIG. 2 is a side view showing a main part of the opening / closing control device in FIG.

FIG. 3 is a timing chart showing changes in the resistance value of the potentiometer and the state of the switch unit in FIG.

FIG. 4 is a block connection diagram showing an electric circuit of the opening / closing control device of the present invention.

[Explanation of symbols]

 2 Control Circuit Section 30 Motor 33 Reducer 34 Position Detection Section 36 Output Shaft 37, 38 Slider 41 Thick Film Resistor P Potentiometer S Switch Section

Claims (1)

[Claims] 1. A shutter or automatic door opening / closing control device for stopping the shutter or the automatic door by shutting off the electric power supplied to the motor at the lower limit position or the upper limit position of the shutter or the automatic door. The speed reducer that reduces the rotation of the output shaft within one rotation with respect to the amount of elevation required for the shutter or the automatic door, the slider attached to the output shaft of the speed reducer, and the slider slide A potentiometer having an endless circular thick film resistance portion for detecting a potential change according to a sliding contact position of the slider with respect to the thick film resistance portion, and a switch with a rotation angle of the output shaft of 180 degrees as a boundary. Drive the motor based on the switch part that changes the state and the setting operation of the upper limit position or the lower limit position of the shutter or the automatic door,
A control circuit that calculates and stores the rotation angle of the output shaft when the shutter or the automatic door stops at the upper limit position or the lower limit position, and controls the motor with the rotation angle as the set upper limit position or lower limit position. Opening / closing control device for shutters or automatic doors equipped with parts.