JPH0762960A - Control device for shutter - Google Patents

Abstract

PURPOSE:To lock a shutter when it is fully closed. CONSTITUTION:When a shutter is located at the upper limit position, a switch USE is turned off, a switch LSW is turned on, a switch SW2 is turned off, a relay X1 is not excited, its contact point X1A is turned off, and a contact point X1B is turned on. Switches SW1A, SW1B, contact points X2A of which are normally turned on, are switched to the C side by a relay X2, and the switch SW2 is turned on, then the relay X1 is excited, the contact point X1A is turned on, the contact point X1B is turned off, and a motor 14 is rotated to lower the shutter. When the shutter is fully closed, the switch LSW is turned off, and the motor 14 is stopped. The contact point X2A is turned on at this time, and the motor 14 is short-circuited. When the shutter is fully closed, an electric locking effect is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter control device for controlling the opening / closing operation of a shutter for opening / closing an entrance / exit of a store, an office, a garage or the like.

[0002]

2. Description of the Related Art FIG. 5 is a front view showing a conventional shutter, in which 1 is a pair of hollow guide rails provided on both left and right sides of an opening or the like to be opened and closed by the shutter.
Is a plurality of panels, and these panels 2 are configured so as to close the doorway by suspending and connecting the panels 2 in the vertical direction. The left and right side edges of the panel 2 are inserted into the guide rail 1 through vertically elongated narrow openings provided in the guide rail 1. 3 is a pin provided on both side edges of each panel 2 and 4 is a guide roller rotatably provided on the pin 3, which rolls vertically in the guide rail 1.

Reference numeral 5 denotes a chain for suspending a plurality of panels 2 in a linked manner by engaging the respective pins 3 and is provided in the guide rail 1. Reference numeral 6 denotes a drive mechanism for raising and lowering the panel 2 and a storage portion for storing the panel 2, which is provided in the back of the ceiling or the like. The drive mechanism is composed of a sprocket meshed with the chain 5, a motor for rotating the sprocket, a speed reducer thereof, and the like.

Next, the operation will be described. FIG. 5 shows a state in which the shutters are closed, and all the panels 2 are in the lowered position to close the space between the pair of guide rails 1. When the motor is rotated from this state, the sprocket rotates and the chain 5 is wound up. Therefore, each panel 2 rises as each guide roller 4 rolls upward in the guide rail 1 and is sequentially stored in the storage section 6. It will be stored. Two rails are provided in the storage portion 6 in parallel with each other in the horizontal direction, and the guide rollers 4 are guided by the rails so that the panels 2 are aligned and stored in one row. As described above, the shutter is opened.

When the motor is rotated in the opposite direction from this state, the chain 5 is extended and the respective panels 2 are sequentially ejected from the accommodating portion 6 and descend along the guide rails 1 again, and the fully closed state of FIG. Becomes

Some lockers are provided with an automatic lock device or a manual lock device to lock the shutter at the fully closed position. In the case of a manual lock device, a locking device is provided on the inside of the lower part of the shutter (inside the room), and when unlocking this, open a small window provided on the shutter from the outside,
It is necessary to put a hand from there and operate the lever to unlock.

[0007]

Since the conventional shutter is constructed as described above, when the manual locking device is used to lock the shutter in the fully closed position, the shutter must be unlocked. It is necessary to open the small window and operate the lever. In that case, the small window of the shutter is provided in the lower part, so the operation is troublesome.
In addition, the lock may freeze during cold weather, making it difficult to operate. Further, the automatic lock device has a problem that the mechanism is complicated and the cost is high.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a shutter control device capable of reliably locking the shutter when fully closed by using a simple mechanism. I am trying.

[0009]

According to the present invention, there are provided detection means for detecting that the shutter is in the closed position, and short-circuit means for short-circuiting both ends of the motor for driving the shutter by the detection of this detection means. There is.

[0010]

[Function] Since the motor is short-circuited when the shutter is fully closed,
Even if the power is turned on unexpectedly, the motor does not rotate to open the shutter, and the shutter cannot be opened manually, so that an electrically locked state can be obtained.

[0011]

1 is a circuit diagram showing a shutter control device according to an embodiment of the present invention. In FIG. 1, 1 is A
C100V power supply terminal, 11 is a fuse, 12 is a transformer, 13 is a rectifier, X2 is a relay, C1 is a smoothing capacitor, USW is a switch composed of a micro switch for detecting the upper limit position (open position) of the shutter, and LSW is a shutter. The switches SW1A and SW1B, which are micro switches for detecting the lower limit position (closed position) of the switch SW1A and SW1B, switch the opening and closing of the shutters, and are interlocked with each other and have an open contact O and a closed contact C. SW2 is a power switch, X1 is a relay, 14 is a motor for opening and closing a shutter, and a DC motor is used. X1A and X1B are the contacts of the relay X1, X
2A is a contact of the relay X2. The contacts X2A and X1B are connected in series, and this series circuit is connected in parallel between a pair of electrodes of the motor 14.

FIGS. 2A and 2B show a shutter drive mechanism. In FIG. 2, in the case 15, the motor 14 and the rotation of the motor 14 are, for example, 1/25.
A gearhead 16 is provided as a speed reducer that reduces the speed to zero. An extension output shaft 19 connected to the output shaft 18 of the gear head 16 is provided in the case 17 attached to the case 15 via the attachment portions 16a and 17a. A tip portion 19a of the extension output shaft 19 penetrates a mount 20 provided in the case 17 and is axially supported by a bearing metal 21, and a sprocket 22 for meshing the chain 5 shown in FIG. It is provided. Further, the extension output shaft 19 is provided with a position detection plate 23.

FIG. 3 shows the extension output shaft 19 and the position detecting plate 23. The gear head 16 is provided at one end of the extension output shaft 19.
A fitting hole 19b into which the output shaft 18 is fitted and fixed is provided, and a screw portion 19c is provided on a part of the peripheral surface. The position detection plate 23 is provided with protrusions 23a and 23b on both sides, and is provided with a screw hole 23c in which a screw to be screwed with the screw portion 19c is provided on the inner peripheral surface.

Referring again to FIG. 2, the switches USW and LSW are attached to the bracket 24, respectively. FIG. 4 shows the bracket 24 and the switch USW (LS
W) is shown. In FIG. 4, the bracket 24 has a U shape, and mounting plates 24a and 24b are provided on the upper and lower sides, and a mounting screw hole 24c is provided. Switch U
SW (LSW) is composed of a micro switch, the switch USW is mounted on the mounting plate 24d, and the switch LSW is mounted on the mounting portion 24e.

In FIG. 2, one side portion 17b of the case 17 is provided.
Is provided with three elongated holes 25, 26, 27 in parallel with the extension output shaft 19, and the elongated hole 27 is formed in the side portion 17c (FIG. 2C) opposite to the one side portion 17b. An elongated hole 27 is provided to face with. The protrusions 23a and 23b of the position detection plate 23 are slidably engaged with the elongated holes 27. Further, the bracket 24 to which the switches USW and LSW are mounted has its mounting plates 24a and 24b slidably engaged with the long holes 25 and 26, and is semi-fixed by screws 28 screwed into the screw holes 24c. ing.

Next, the operation of the above configuration will be described. First, the screw 28 for fixing the bracket 24 is loosened to move the bracket 24 along the long holes 25, 26, and the left and right movement amounts are adjusted to determine their positions.
The upper limit position (open position) and the lower limit position (closed position) of the shutter are set by tightening.

When the shutter is in the open position and is stopped, the position detecting plate 23 is in the leftward position in FIG. 2 and the switch USW is off. At this time, in FIG. 1, the switch USW is OFF, the switch LSW is ON, and the switches SW1A and SW1B are contact points O.
On the other hand, the switch SW2 is OFF. Further, the relay X2 is always energized by the direct current obtained from the rectifying unit 13, and the contact X2A is ON. The relay X1 is not energized, and its contact X1A is OF.
F and X1B are ON.

Next, in order to close the shutter from this state, when the switches SW1A and SW1B are switched to the contact C side and then the switch SW2 is turned on, the relay X1 is energized to turn on the contact X1A and turn off X1B. Become.
Therefore, electric current is supplied to the motor 14 and
Rotates. This rotation is reduced by the gear head 16 and transmitted to the extension output shaft 19 via the output shaft 18 thereof. The rotation of the extension output shaft 19 causes the position detecting plate 2 to pass through the screw portion 19c and the screw hole 23c of the position detecting plate 23.
3 moves to the right in FIG. Switch USW at this time
Turns on.

When the shutter reaches the set lower limit position, the position detecting plate 23 turns off the switch LSW.
As a result, the relay X1 is de-energized, the contact X1A is turned off, and the motor 14 is stopped. Also contact X2A
Is turned on and both ends of the motor 14 are short-circuited. Therefore, even if the power is turned on in this state to open the shutter, the motor 14 is short-circuited, and therefore the shutter does not open. Further, even if the shutter is manually opened, it cannot be opened due to the electric locking effect, and the shutter is substantially locked.

To open the shutter, switch SW1
After switching A and SW1B to the contact O side, switch SW2
By turning on, the relay X1 is energized again,
An electric current in the opposite direction to the above is applied to the motor 14, and the motor 14 rotates in the reverse direction. As a result, the position detecting plate 23 moves leftward away from the switch LSW, and when the set upper limit position is reached, the switch USW is turned off and the shutter is stopped.

If a power failure occurs during the raising / lowering operation of the shutter, the shutter stops in the middle of raising / lowering, but at this time, the relay X2 is de-energized so that the contact X2A is turned off and the motor 14 is not short-circuited. . Therefore, the shutter is not locked and the shutter can be easily opened and closed by manual operation. A resistor may be inserted in the series circuit of the contacts X1B and X2A depending on the magnitude of the short-circuit current of the motor 14.

[0022]

According to the present invention, both ends of the motor are short-circuited when the shutter is in the closed position.
It is possible to obtain an electric locking effect when the shutter is driven by the drive mechanism when the shutter is fully closed. Therefore, it is possible to realize a highly reliable device at a low cost with a simple configuration without providing any other mechanism such as a brake mechanism. In addition, it is possible to save the labor of the user's operation and the like, and it is possible to obtain the effect of eliminating the problem such as freezing during cold weather.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing a shutter control device according to an embodiment of the present invention.

2A and 2B are a plan view and a side view showing an embodiment of a shutter drive mechanism.

FIG. 3 is a perspective view showing a part of a drive mechanism.

FIG. 4 is a perspective view showing a mounting mechanism of a switch.

FIG. 5 is a front view showing an example of a conventional shutter to which the present invention can be applied.

[Explanation of symbols]

 LSW lower limit position detection switch (detection means) X1 relay (short circuit means) X1A relay X1 contact (short circuit means) 14 motor 19 extended output shaft (detection means) 23 position detection plate (detection means)

Claims (1)

[Claims] 1. A shutter control device for controlling movement of a shutter between a predetermined open position and a closed position by driving the shutter with a motor, and detecting means for detecting that the shutter is in the closed position. A shutter control device comprising: short-circuiting means for short-circuiting both ends of the motor according to the detection of the detecting means.