JPH108863A - Obstacle detection device for shutter - Google Patents

Abstract

(57) [Problem] To provide a shutter obstacle detection device that can safely operate a shutter even when a power supply voltage for driving a transmitter is reduced. SOLUTION: When a power supply voltage of a dry battery mounted on a transmitter falls below a predetermined level, a voltage drop signal is transmitted to a light receiving device side, and when a voltage drop signal is received by the light receiving device, The shutter curtain is controlled so as to move downward only by continuing to hold down the lowering switch. Also,
At this time, the operation of raising the shutter curtain can be performed as usual.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the position of a seat plate located at the bottom of a shutter curtain when it collides with an obstacle.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter obstacle detection device that stops the operation of a shutter, and more particularly to a technique that can be safely operated even when a battery voltage of a transmitter attached to a seat plate decreases.

[0002]

2. Description of the Related Art Generally, rain-proofing is provided at the entrance of a warehouse or store.
A shutter is attached for the purpose of wind protection or crime prevention.
The shutter is usually provided with a winder for a shutter curtain at a suitable upper portion, and by operating the winder electrically, the shutter curtain is lowered to close an entrance portion, or the reverse. Rotate in the direction to open the entrance. In such a shutter, since the shutter curtain is moved up and down electrically, it is extremely dangerous if, for example, a collision with a foreign object occurs while the shutter curtain is being moved down. Therefore, conventionally, in order to avoid such danger, a micro switch for obstacle detection is mounted on a seat plate attached to the lowermost portion of the shutter curtain, and when a contact with an obstacle is detected by the micro switch. In this case, safety is ensured by forcibly stopping the lowering of the shutter curtain by this detection signal. In addition, since it is difficult to wire using a wire between the microswitch mounted at the lowermost portion of the shutter and the drive circuit of the winder disposed above the shutter, a seat plate has conventionally been used. By arranging a transmitter on the side and attaching a receiver on the drive circuit side, the detection signal of the microswitch is transmitted by a wireless signal, thereby achieving cordlessness.

[0003]

However, in the method of transmitting a detection signal of a microswitch using a radio signal as described above, a power source is required on the transmitter side, and usually several batteries are installed. , The transmission may not be possible if the dry battery is consumed and the power supply voltage drops. That is, when the dry battery is exhausted, even if the presence of an obstacle is detected by the microswitch, the detection signal cannot be transmitted to the receiver side, and the lowering of the shutter cannot be stopped.
It was dangerous. In order to solve this problem, conventionally, when a dry battery is exhausted, a signal for detecting exhaustion is transmitted to the drive circuit side, and an alarm buzzer is sounded to notify the user of the exhaustion of the dry battery, A method has been adopted in which a dry battery voltage confirmation button is provided on the machine, and the confirmation of the dry battery voltage is within a predetermined range by pressing the confirmation button. However, in the method of sounding the alarm buzzer, it is not generally known at what point the alarm buzzer sounds, and if the alarm buzzer sounds during a time period when an unspecified number of people come and go during the daytime, useless anxiety is given. In addition, in the method of providing the battery voltage check button,
The user must periodically check the voltage, which is troublesome and sometimes forgets to check.

[0004] That is, in each of the above methods, whether or not to replace the battery of the transmitter is left to the user, and even if the voltage drop is confirmed, the shutter is operated normally without replacing the battery. Since the battery can be used, the shutter can be used even when the battery is completely consumed and the obstacle detection device is inoperable. In this case, the obstacle detection device may damage the obstacle without detecting the presence of the obstacle, and may not be able to detect the presence of the floor surface. Since the shutter curtain cannot be stopped at the lower limit stop position, the shutter curtain overruns, and even the shutter body is damaged. The present invention has been made to solve such a conventional problem,
An object of the present invention is to provide a shutter obstacle detecting device capable of safely operating a shutter even when a power supply voltage for driving a transmitter drops, in order to ensure that the user is aware of this. Is to do.

[0005]

In order to achieve the above object, the invention according to claim 1 of the present application attaches obstacle detecting means to a seat plate arranged at the lowermost portion of a shutter curtain, and uses the obstacle detector to detect the obstacle. When a contact with a foreign object is detected, the shutter curtain is lowered by transmitting an obstacle detection signal as a wireless signal from the transmitting means attached to the seat plate side to the receiving means attached to the driving means side of the shutter curtain. In the shutter obstacle detection device for stopping, the transmitting means has a driving DC power supply, and transmits a voltage drop signal to the receiving means side when the power supply voltage of the DC power supply becomes lower than a predetermined level. When a voltage drop signal is received by the receiving means, the shutter curtain moves downward only by continuing to hold down a down switch. According to a second aspect of the present invention, in the first aspect, a lower limit switch for detecting when the shutter curtain overruns below a lower limit is provided, and the overrun is detected by the lower limit switch. When it is detected, the shutter is forcibly disabled from lowering.

According to the present invention constructed as described above, when the DC power source mounted on the transmitting means attached to the shutter seat plate is worn out and the voltage drops, the drop in the voltage is detected. This detection signal is transmitted to the receiving means above the shutter. Then, upon receiving this detection signal, the relay contact connected to the electric wiring for lowering the shutter curtain is cut off, and the lowering of the shutter curtain is stopped. Also in this case, since the shutter curtain can be lowered by continuing to press the button for lowering the shutter curtain, the shutter can be closed while confirming safety. Further, when the power supply voltage of the transmitter becomes completely zero level, for example, when the function of the transmitter does not operate and the shutter curtain exceeds the lower limit and overruns, the lower limit switch operates to lower the shutter. It is safe because it is forcibly stopped. In addition, even when the power supply voltage is reduced as described above, the circuit for raising the shutter curtain works effectively, so that the closed shutter can be opened.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram according to an embodiment of a shutter to which the present invention is applied. As shown in FIG. 1, the shutter is provided with a shutter curtain 1 through an opening 2 existing at an entrance of a warehouse or a store. It can be opened and closed by sliding it up and down. A switch 5 for driving the opening and closing of the shutter curtain 1 is attached above the shutter, and the switch 5 raises the shutter curtain 1 as described later.
It has a reversible drive motor for lowering and lowering the shutter curtain 1 under the control of the shutter control panel 16. Further, a limit switch 6 for detecting an upper limit and a lower limit overrun of the shutter curtain 1 is attached to a lower portion of the switch 5.

In the vicinity of the switch 5, a reception control panel 7 for receiving a signal from a transmitter 4 described later and outputting a control signal to the shutter control panel 16 to perform a predetermined operation based on the signal is provided. Have been. A long seat plate 3 is attached to a lower end portion of the shutter curtain 1 along the lateral direction of the shutter curtain 1, and a seat plate switch for detecting contact with a floor surface or an obstacle is provided on a lower surface thereof. 15 is attached, and the seat plate switch 15 is connected to an electric wiring (not shown).
Is connected to a transmitter 4 arranged above the seat plate 3. The transmitter 4 has a horizontally long rectangular parallelepiped shape as shown in FIG. 2. In the battery box 13, for example, four AAA batteries are connected in series and stored as a DC power supply. In addition, near the upper central portion of the transmitter 4, there is a transmission surface 10 that emits an optical signal upward of the shutter.
Further, on the side of the transmitting surface 10, there are provided a battery exhaustion lamp 11 which emits light when battery exhaustion is detected to notify of the fact, and an operation lamp 12 which indicates whether or not the transmitter 4 is operating. Installed. Reference numeral 14 denotes a reset switch, which can be activated by pressing the switch 14 at the time of initial setting, battery replacement, and the like.

At a position facing the transmitter 4 at the upper end of the opening 2 shown in FIG. 1, a light receiver (receiver) 9 for receiving an optical signal emitted from the transmission surface 10 of the transmitter 4 is attached. Thus, optical transmission is performed with the transmitter 4. Reference numeral 8 denotes a push button switch,
Three push buttons of “open”, “closed”, and “stop” are attached. FIG. 3 is a wiring diagram showing an electrical connection of the shutter obstacle detection device according to the present embodiment. The operation of the reversible drive motor M1 that is driven when opening and closing the shutter curtain 1 is performed under various conditions. It is controlled by

In FIG. 1, three terminals R, S, and T
The power supplied at 200V phase is a knife switch Ks
1, connected to three terminals U, V, W of the drive motor M1 via a fuse Fu1, and on this path, a contact MC1-a1 of the electromagnetic switch MC1 and an electromagnetic switch MC2
A-contacts MC2-a1 are wired in parallel, and the wiring connected to the output side of each contact is switched at two places. That is, when the contact MC1-a1 is connected, the terminals R and U, the terminals S and V are connected, and the terminals T and W are connected. When the MC2-a1 is connected, the terminals R and W and the terminal S are connected. V, terminals T and U are connected to each other, so that when the electromagnetic switch MC1-a1 is turned on, the drive motor M1 is driven to rotate in the forward direction, and the electromagnetic switch M1-a1 is turned on.
When C2-a1 is turned on, the motor M1 is driven to rotate in the reverse direction.

The wiring from the terminal R is connected to one end of a stop button PB2 via a thermostat contact Th1, and the wiring from the terminal S is connected to one end of a down button PB3 via a coil of a relay Rc. PB2 and PB3
Are connected and branched in four directions, one of which is connected to one end of an ascending button PB1, the second is connected to one end of a contact Rc-a1 of a relay Rc, and the third is The fourth contact is connected to one end of an a-contact MC1-a2 of the electromagnetic switch MC1, and the fourth is an a-contact MC2- of the electromagnetic switch MC2.
a2. The other end of the ascending button PB1 is connected to the other end of the MC1-a2, and this connection point is branched into two systems, one of which is connected to the reception control panel 7 via the terminal Z.
Connected to internal microcomputer 17. The other is connected to the coil of the electromagnetic switch MC1 via a limit switch LS1 for detecting that the shutter curtain 1 has reached the upper limit, and a b-contact MC2-b. The other end is connected to the wiring from the terminal S.

The other end of the contact Rc-a1 of the relay Rc;
The other end of MC2-a2 is connected, and this connection point is connected to the relay contacts X1, X2, X3 and the b contact M of the electromagnetic switch MC1.
It is connected to the electromagnetic switch MC2 via C1-b.
The other end is connected to the wiring from the terminal S. An a-contact Rc-a2 of the relay Rc is disposed in parallel with the contact X3. A microcomputer 17 and a power supply circuit 18 for driving the microcomputer 17 are mounted inside the reception control panel 7, and the microcomputer 17 receives a signal from the receiver 9, a signal from the terminal Z, and a lower limit overrun. , A signal from the limit switch LS2 for detecting the signal is taken, and the relays X1, X2, and X3 are operated to perform control as described later. The relay X1 is shown in FIG.
When a contact with an obstacle is detected by the seat plate detection switch 15 of the seat plate 3 shown in FIG. The relay X2 is energized when the shutter curtain 1 overruns the lower limit and the lower limit switch LS2 is turned off, and is deenergized when the microcomputer 17 is reset. The relay X3 is energized when receiving a signal indicating that the power supply voltage of the transmitter 4 has fallen below a predetermined level, and is deenergized when the reset button 14 (see FIG. 2) of the transmitter 4 is pressed. . The power supply circuit 18 transforms an input voltage given at 200V AC to 5V DC and outputs it.

Next, the operation of this embodiment configured as described above will be described. Now, when the shutter curtain 1 is closed and the shutter curtain 1 is to be raised, the lift button PB1 is pressed. Thereby, Th1, PB2, PB
1, LS1, and the voltage between the terminals R and S is applied to the coil of the electromagnetic switch MC1 via MC2-b.
C1 is excited. As a result, the contact MC1-a1 is turned on, so that the drive motor M1 is driven to rotate in the forward direction, and the shutter curtain 1 rises. And P
Since the contact MC1-a2 is in a connected state even if the hand is released from B1, the coil of the electromagnetic switch MC1 continues to be excited through this path, and the stop button PB2 is pushed or the upper limit is reached. Until the limit switch LS1 operates, the shutter curtain 1 keeps rising. In this way, the shutter curtain 1 can be lifted to open the opening 2.

On the other hand, when closing the opening 2 with the shutter curtain 1 opened, the down switch PB3 is pressed. Thereby, Th1, PB2, PB
The voltage between the terminals R and S is applied to the coil of the relay Rc via 3 to excite the relay Rc. As a result, the contact points Rc-a1 and Rc-a2 are turned on, so that Th
1, PB2, Rc-a1, X1, X2, X3 (or
Rc-a2), terminals R and S are connected to both ends of the coil of the electromagnetic switch MC2 via the b-contact MC1-b of the electromagnetic switch MC1.
As a result, the coil of the electromagnetic switch MC2 is excited, and the MC2-a1 is turned on. As a result, the drive motor M1 is driven to rotate in the reverse direction, and the shutter curtain 1 moves downward. Even if the hand is released from the down button PB3, MC2
Since -a2 is on, the coil of the electromagnetic switch MC2 is continuously excited through this path, and the shutter curtain 1 is continuously lowered.

When the seat plate 3 shown in FIG. 1 comes into contact with an obstacle during the descent, or when the seat plate 3 reaches the lowermost portion and comes into contact with the floor, this is detected by the seat plate switch 15, and this detection is performed. The signal is transmitted as an optical signal from the transmitter 4 to the light receiver 9.
The relay X1 is excited by the operation of the microcomputer 17 shown in FIG. 3 and the b contact X1 is cut off.
As a result, the circuit for supplying a voltage to the coil of the electromagnetic switch MC2 is cut off, so that the drive motor M1 stops, and the lowering of the shutter curtain 1 stops. Since the relay contact X1 operates so as to return (turn on again) when a voltage is supplied via the terminal Z, the contact X1 is turned on unless an operation for raising the shutter curtain 1 is performed. However, when the shutter curtain 1 comes into contact with an obstacle, it is necessary to perform an operation of raising the shutter curtain once, so that safety can be ensured.

Here, if the dry batteries stored in the transmitter 4 are exhausted and the power supply voltage drops, even if contact with an obstacle is detected by the seat switch 15 shown in FIG. Since the signal cannot be accurately transmitted to the photodetector 9 side, the contact X1 shown in FIG. 1 is not always interrupted, and therefore, even when the seat plate 3 comes into contact with an obstacle, the shutter curtain 1 is not moved. The descent may not stop. Therefore, in the present embodiment, when the output voltage of the dry battery decreases and becomes lower than a predetermined level, a battery exhaustion signal is transmitted from the transmitter 4 to the light receiver 9. As a result, the coil of the relay X3 is excited, the b contact X3 is cut off, and the conduction of the electromagnetic switch MC2 is released, so that the lowering of the shutter curtain 1 stops.

Further, even when the contact X3 is cut off, if the down button PB3 is kept pressed, the coil of the relay Rc is excited, so that the contact Rc-a2 arranged in parallel with the contact X3 is turned on. Since the coil of the electromagnetic switch MC2 is excited by this path, the drive motor M
1 can be driven to rotate in the opposite direction. That is, when the power supply voltage of the transmitter 4 is reduced, the shutter curtain 1 can be lowered by continuing to press the down button PB3. In this case, since the user is always near the shutter, even if the operation of the shutter curtain 1 cannot be stopped by the detection signal of the seat plate switch 15, the user can confirm the safety. As a result, contact with an obstacle can be avoided.

When the voltage of the dry battery stored in the transmitter 4 becomes completely zero or no dry battery is inserted, for example, when the shutter curtain 1 is lowered to a point beyond the lower limit switch LS2, The contact of the limit switch LS2 is turned off, and the microcomputer 1
7 receives this signal and excites the coil of the relay X2, so that the b contact X2 is cut off and the electromagnetic switch M
Power supply to C2 is cut off and shutter curtain 1
Will stop falling. Since the limit switch LS2 is reset by pressing a reset switch (not shown) of the microcomputer 17, the shutter cannot be lowered until a reset operation is performed.

As described above, according to the present embodiment, when the power supply voltage of the transmitter 4 is lowered, this is detected and the relay contact X3 is cut off. The curtain 1 cannot be lowered. Therefore, even when data transmission between the transmitter 4 and the light receiver 9 malfunctions due to a drop in the power supply voltage, the user is always present near the shutter, which is safe. Also, the shutter curtain 1
Unless the down switch PB3 is kept depressed, the lowering operation stops, so that the user can recognize the consumption of the dry battery, so that the user does not forget to replace the dry battery.
In addition, even when the transmission means does not function, if the shutter curtain exceeds the lower limit position, the lower limit switch operates to stop the lowering of the shutter curtain, so that the shutter curtain overruns and damages the shutter body as well. Problem can be solved.

Further, even when the power supply voltage drops, the operation by the up button PB1 operates effectively, so that the shutter curtain 1 is opened when the shutter curtain 1 is closed regardless of the power supply voltage state of the transmitter 4. can do. That is, when the shutter curtain 1 is raised, there is no danger due to contact with an obstacle or the like, and there is a case where the shutter curtain 1 is required to be opened immediately in an emergency or the like. The shutter curtain 1 can be raised.

In the above embodiment, the configuration in which the signal from the seat plate side is transmitted by an optical signal has been described.
The present invention is not limited to this, and it goes without saying that other wireless signals can be used. In the above-described embodiment, an example has been described in which the shutter curtain 1 is raised and lowered using the drive motor M1 capable of reversible operation. However, recently, a winding motor that can rotate only in the forward direction has been described. When raising and lowering the shutter curtain 1, there is often used a type in which a natural descent caused by gravity is adjusted by a brake, but it is needless to say that such a configuration can also be applied.

[0022]

As described above, according to the present invention,
When the voltage of the DC power supply mounted on the transmitting means attached to the seat plate drops and falls below a predetermined level, this detection signal is transmitted to the receiver (receiver), and the control panel side By providing this detection signal, it becomes possible to lower the shutter curtain only by holding down the lowering switch. Therefore, the user must be in the vicinity of the shutter, so that the shutter can be monitored and it is safe. In addition, since the user can be notified that the DC power supply (dry battery) has been consumed, the user can immediately replace the battery with a new one, which is safe. When the transmitter 4 does not function, for example, when the power supply voltage is completely zero or when no dry cell is inserted, the lowering of the lower limit switch forcibly stops the lowering of the shutter curtain. Therefore, overrun can be prevented. Furthermore, since the operation of raising the shutter curtain has nothing to do with the power supply voltage of the transmitting means, the closed shutter curtain can be raised even if the power supply voltage of the transmitting means decreases. Therefore, the shutter can be opened immediately in an emergency or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a shutter to which a shutter obstacle detection device of the present invention is applied.

FIG. 2 is an explanatory diagram showing a detailed configuration of a transmitter.

FIG. 3 is an explanatory diagram illustrating a circuit configuration of the obstacle detection device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Opening 3 Seat plate 4 Transmitter 5 Switch 6 Limit switch 7 Reception control board 8 Push button switch 9 Light receiver 10 Transmitting surface 11 Battery exhaustion lamp 12 Operating lamp 13 Battery box 14 Reset button 15 Seat switch 16 Shutter control panel 17 Microcomputer 18 Power supply circuit M1 Drive motor MC1, MC2 Electromagnetic switch PB1 Up button PB2 Stop button PB3 Down button LS1 Upper limit switch LS2 Lower limit switch X1 Obstacle detection relay contact X2 Lower limit switch relay contact X3 Power supply voltage drop Detection relay contact

Claims (2)

[Claims] 1. An obstacle detecting means is attached to a seat plate arranged at the lowermost portion of a shutter curtain, and when the obstacle detector detects contact with a foreign object, a transmitting means attached to the seat plate side. An obstacle detection device for stopping the lowering of the shutter curtain by transmitting an obstacle detection signal as a wireless signal from the means to a receiving means attached to the driving means side of the shutter curtain, wherein the transmitting means comprises a driving DC power supply. When the power supply voltage of the DC power supply is below a predetermined level, a voltage drop signal is transmitted to the receiving means side, and when the voltage drop signal is received at the receiving means side,
An obstruction detection device for a shutter, characterized in that the shutter curtain moves only when the down switch is kept pressed. 2. A lower limit switch for detecting when the shutter curtain exceeds the lower limit and overruns the lower limit switch when the overrun is detected by the lower limit switch. 2. The obstacle detecting device for a shutter according to claim 1, wherein the obstacle is forcibly disabled.