JPS6245882A - Method of automatically controlling electric shutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to an electric shutter installed at an opening or entrance of a building, etc., or an electric shutter that can automatically close a store, bank, factory, etc. This invention relates to an automatic control method.

(Prior art) In general, not only when automatically closing stores, factories, banks, cash corners, etc. by remotely controlling electric shutters, but also when manually closing electric shutters, problems associated with the lowering of the shutter curtain occur. It is necessary to effectively prevent human danger and damage to the shutter due to collisions with objects.

Conventionally, as a method that can meet this demand, there has been a
There is a technique disclosed in Publication No. 5745 (Japanese Unexamined Patent Publication No. 51-46737).

In this conventional technology, a detector is attached to the underside of a seat plate provided at the lower end of the shutter curtain, and when the detector detects an obstacle when the shutter comes into contact with an obstacle, the shutter is turned off once. The curtain is stopped, raised to a certain height, stopped again, and then lowered to repeat the above operation until the obstacle is removed.

(Problems to be Solved by the Invention) Although such prior art can meet the above requirements to some extent, the detector that is activated upon contact with an obstacle is attached to the lower end of the shutter curtain. Due to the configuration,
The problem is how to transmit the detection signal from the detector to a control panel for driving the shutter curtain, etc.

That is, first, there is wireless communication as a transmission means using a transmitter installed in the detector and a receiver installed in the control panel.
The power source required for the transmitter is a battery,
The batteries must be replaced periodically, making management very complicated, and maintenance cannot be done inexpensively.

The next possible means of transmission is wired,
As the shutter curtain goes up and down, the lead wires must be stretched or wound up, and the mechanical life of the lead wires is limited, so parts must be replaced periodically, making it impractical. It's not something.

In addition, the detector attached to the lower end of the shutter curtain is exposed directly to the outside, so it is easily subjected to excessive external force, and when the water rises due to heavy rain, etc., it will be submerged in water, and the detector itself will be replaced under management. This made it particularly unsuitable for use in low-lying areas.

Therefore, an object of the present invention is to provide an automatic control method for an electric shutter that is inexpensive, does not require complicated management, and can open and close the electric shutter safely and reliably without any restrictions on the location where it can be used. It has been done.

(Means for Solving the Problems) In order to solve such problems, according to the present invention, in an electric shutter provided with an overload detector for raising and lowering the shutter curtain, the above-mentioned Provided is an automatic control method for an electric shunter, characterized in that when an overload detector is activated, the shutter curtain is immediately stopped from lowering, the shutter curtain is raised and stopped again, and then the shutter curtain is lowered again. be done.

In the above configuration, the overload detector may detect a change in the voltage or current applied to the drive motor of the shutter curtain.In the above configuration, the overload detector may detect an overload when the shutter curtain is raised or lowered. It can be detected mechanically and then converted electrically.

Furthermore, in the above configuration, the shutter curtain may be raised to the upper limit of the shutter when it stops and rises when the overload detector is activated.

Furthermore, in the above configuration, when the shutter curtain stops and rises when the overload detector is activated, the shutter curtain may rise to a predetermined constant height from its stop position.

Furthermore, in the above configuration, when the shutter curtain is to be lowered again, it can be raised and stopped again, and then lowered again when a desired time has elapsed.

Furthermore, in the above configuration, the electric shank is capable of emitting an abnormality signal when the overload detector is activated, and the operations of stopping the shutter curtain, raising it 1, stopping it again, and lowering it again are repeated a predetermined number of times. If the overload detector is activated, it can issue an abnormal signal and stop the subsequent operation of the shinotar curtain.

Furthermore, in the above configuration, the overload detector is capable of immediately stopping the shutter curtain if activated while the shutter curtain is rising.Furthermore, in the above configuration,
An electric shutter can be equipped with an obstacle detection sensor directly below or near the shutter to detect a tangible object that obstructs the shutter curtain from descending, and if this detection sensor is activated, it will be treated as if an overload detector had been activated. In addition, the operation of the detection sensor can be ignored while the shutter curtain is rising.

(effect) The above technical means works as follows.

When the shutter curtain is raised and lowered, if the shutter curtain comes into contact with an obstacle that obstructs the raising and lowering, or if the shutter curtain malfunctions due to a malfunction or the like, an overload occurs in the drive of the shutter curtain.

If there is a problem with the raising and lowering of the shutter curtain, there will always be a change in the load on the drive system of the shutter curtain, so if this change in load is detected, malfunctions associated with the raising and lowering of the shutter curtain can be directly detected, as well as when the shutter curtain is raised and lowered. In addition, this overload detector should not be installed on the sliding part or the lower end of the shutter curtain (or on the shack's control panel or motor switch). Alternatively, since it can be installed on the shutter drum shaft, etc., there is no need to install lead wires on the sliding part, and there is no need for wireless equipment or batteries at all.With a simple structure, there is no problem in raising and lowering the shutter curtain. In addition, even if the overload detector is activated, the shutter curtain will be raised once and then lowered again if a lowering command is issued, so even if there is a temporary disturbance, It can be closed safely and reliably, and operates so that the electric shutter can be automatically closed safely and unattended.

(Embodiment) To explain one embodiment of the present invention with reference to the drawings, the illustrated electric circuit is an example of a voltage range in which a single-phase capacitor motor is used and an overload detector detects a change in voltage. be.

ta+ When opening the shutter, that is, when raising the shutter curtain.

In this case, the shutter curtain is in the fully closed or half-open state, and when the shutter rise start button PBU is pressed, relay x 1 is activated, electricity flows to the motor M, and the shutter curtain is pressed either by pressing the stop button PBS or by pressing the upper limit switch. L
Rise until SU runs out.

(bl When closing the shutter, that is, when lowering the shutter curtain.

In this case, the shutter curtain is fully open or half open, and when the shutter lowering start button PBD is pressed, relay x2 is activated, electricity flows to motor M, and the shutter curtain stops. The switch LSD is activated and the timer TI falls until the set time elapses.

(When the C1 overload detector is activated.

If there is an obstacle that prevents the shutter curtain from descending, an excessive load will be placed on the motor M, causing the transformer T to
An excessive current flows in the primary winding of the current transformer, and an excessive current also flows in the secondary side in proportion to the number of turns of the transformer T.

Therefore, when the voltages at the resistors R1, VR, and R3 increase until they exceed the Zener voltage of the Zener diode D3, the Zener diode D3 turns on and sends a signal to the gate G of the thyrisk D4, thus causing the thyrisk The resistance between the anode A and the cathode of D4 suddenly decreases, and relay x9 is activated.

By activating this relay x9, relay
8 is turned on, and then relay X-5 is turned on to hold itself and at the same time stop the descending curtain.

Next, relay x6 is turned ON to raise the shutter curtain, and when the set time of timer T2 has elapsed, relay
7 is turned on, and the rising is stopped by turning off relay X6.

Next, when the set time of timer T3 has elapsed, the self-holding of relay x5 is released, and the shutter curtain is lowered again by a command from relay x3, which remembers that the shank curtain was lowering.

In addition, C is the motor starting/running capacitor, DI, D2
is a commutator, and VR is a variable resistor.

(Effects of the Invention) As explained above, the present invention can not only safely and reliably control the elevation of the shutter slats in unmanned automatic closing or remote opening/closing of electric shutters, but also prevent sliding defects of the shutter slats themselves. Even in the event of an abnormality, the shutter slats will not be raised or lowered forcibly, and damage to one member of the shutter can be further prevented.

In addition, it has a simple structure with sufficient durability, does not require special management or periodic replacement, and can be implemented at low cost. Moreover, it is not affected by the installation location of the electric shutter, and can be used in any situation. It has the advantage that it can be easily applied to electric shutters as well.

[Brief explanation of the drawing]

The drawing is a circuit diagram of a main part showing an embodiment of the automatic control method for an electric shutter according to the present invention. In the drawing, LSU is an upper limit switch, LSD
is the lower limit inch, M is the motor, XI or ×9
is a relay, T1 to T3 are timers, R1 to R4
is a resistor, T is a transformer, PBS is a stop button, PBU is a rise start button, and PBD is a fall start button.

Claims (1)

[Scope of Claims] 1. In an electric shutter equipped with an overload detector for raising and lowering the shutter curtain, if the overload detector is activated while the shutter curtain is lowering, the lowering of the shutter curtain is immediately stopped, and An automatic control method for an electric shutter, characterized by raising the shutter curtain, stopping it again, and then lowering the shutter curtain again. 2. The automatic control method for an electric shutter according to claim 1, wherein the overload detector detects a change in voltage or current applied to a drive motor of the shutter curtain. 3. The automatic electric shutter according to claim 1, characterized in that the overload detector mechanically detects the overload during lifting and lowering of the shutter curtain, and then electrically converts and detects the overload. Control method. 4. The shutter curtain according to any one of claims 1 to 3, wherein the shutter curtain stops and rises to the upper limit when the overload detector is activated. Automatic control method for electric shutter.