JP2509726Y2 - Electric shutter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an electric shutter, and in particular, in the event of a fire or the like, the shutter curtain is lowered by its own weight, and the shutter curtain is extended more than usual from the winding shaft. The present invention relates to an electric shutter having a circuit breaker that is activated when the switch is turned off to prevent power from being supplied to the switch.

[Problems to be solved by conventional techniques and devices]

In an electric shutter such as a fireproof shutter, a brake is opened by a fire signal when a fire occurs, and the shutter curtain is configured to drop by its own weight to close the opening. At this time, the shutter curtain is fed out from the winding shaft more than usual, thereby activating the circuit breaker for emergency stop. In this state, electric power is not supplied to the opening / closing device for moving the shutter curtain in the opening / closing direction, so that the opening / closing device does not operate even if the operating device is operated. Therefore, it is necessary to wind up the shutter curtain and restore the circuit breaker by a handle or a chain for manual operation.

For this reason, when the weight of the shutter curtain is lowered by a fire inspection or the like in a building where many fireproof shutters are installed, it is necessary to wind up the many shutter curtains and restore the circuit breaker, which requires a great deal of labor. ing.

The present invention has been made to solve the above-mentioned problems, and even when the breaker for the emergency stop of the shutter is activated, the special operation of the actuator raises the shutter curtain to restore the breaker, and the fire It is an object of the present invention to provide an electric shutter that can reduce the trouble of returning the circuit breaker at the time of inspection or the like.

[Means for solving the problem]

In order to achieve the above object, the electric shutter of the present invention is an electric shutter in which the brake is released in an emergency and the shutter curtain wound around a predetermined winding shaft moves in the closing direction by its own weight. An opening / closing device that moves the shutter curtain in the opening / closing direction when the operation is performed, and a controller that controls the opening / closing device to be supplied with power based on a normal operation of opening / closing the shutter curtain of the operating device,
The shutter curtain is moved by its own weight in the closing direction, and is activated when the shutter curtain is extended from the winding shaft more than usual by the momentum resulting from the movement, and a breaker that shuts off the power supply to the switch When the operation device is operated and the operation device is specially operated differently from the normal operation, the return means supplies electric power to the switch and moves the shutter curtain in the opening direction to return the circuit breaker to the inoperative state.
It is configured to include.

[Action]

The controller controls so that electric power is supplied to the opening / closing device based on a normal operation of opening / closing the shutter curtain of the operating device. As a result, the shutter curtain moves in the opening / closing direction by the opening / closing device.

In an emergency, the brake is released, the shutter curtain wound around the winding shaft moves in the closing direction by its own weight, and further, the shutter curtain is paid out from the winding shaft more than usual by the force of the movement. At this time, the circuit breaker is activated so that power is not supplied to the switch.

When the operating device is operated by a special operation different from the normal operation in this state, the returning means supplies electric power to the opening / closing device to move the shutter curtain in the opening direction. As a result, the shutter curtain is wound up by a larger amount than the normal time, and the circuit breaker automatically returns to the inoperative state at this point.

In the case of the above-mentioned emergency, it means that a fire signal is output from a fire alarm or the like due to a fire or mist, or a simulated fire signal is output from a prescribed inspection device during a fire inspection. . A reset switch or the like may be used as the resetting means, but it is not preferable for safety because the user may reset the circuit breaker. Therefore, in the present invention, the circuit breaker is reset by a special operation that is not easily known to the user.

[Effect of device]

As described above, according to the present invention, by specially operating the operating device with the circuit breaker activated, power is supplied to the switch to move the shutter curtain in the opening direction to automatically operate the circuit breaker. As a result, it is possible to effectively return to the non-operating state, so that it is possible to reduce the time and effort required for restoration during a fire inspection, etc. without impairing safety.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 is a schematic view of an electric shutter to which the present invention is applied. The shutter curtain 10 is configured to move up and down with its both sides guided by guide rails 21 having a substantially U-shaped cross section that extends from the lintel portion 16 to the floor surface 17. The upper end of this shutter curtain 10 is attached to the winding shaft 23, and the winding curtain 23 is wound or wound by rotating the winding shaft 23 by a motor 22 as a switch via a chain 25. It is returned and the shutter curtain can be moved up and down.
Further, the motor 22 is provided with a brake 14 (see FIG. 1) for stopping the vertical movement of the shutter curtain 10, and the brake 14 releases the braking operation when electric power is supplied. , When the power is no longer supplied, braking is activated. Further, an automatic closing device 80 for releasing the braking by the brake 14 is installed above the motor 22. To this automatic closing device 80, when a fire signal is output from a fire alarm or when a pseudo fire signal is output from a predetermined fire inspection device, a DC24V voltage is applied, and the automatic closing device 80 operates, A predetermined electric power is supplied to the brake 14. As a result, the braking operation of the brake 14 is released.

Further, above the lintel portion 16, a control device 20 connected to a motor 22 for opening and closing the shutter curtain is provided. The control device 20 includes an operating button equipped with an open button switch, a stop button switch, and a close button switch.
18 connected. By operating these switches on the actuator 18, the shutter curtain is raised and stopped,
Can be lowered.

Next, the circuit diagram of the first embodiment will be described with reference to FIG. One end of the stop button switch 26 of the actuator 18 is a U-phase electric wire.
Connected to 30. Further, the other end of the stop button switch 26 is connected via an open button switch 24, a normally closed contact 36 opened / closed by an exciting coil 48, an exciting coil 38, and an upper limit switch 40 opened when the shutter curtain reaches the upper limit position. Auxiliary limit switch as a circuit breaker 42
It is connected to the. Further, the other end of the stop button switch 26 is connected via a closing button switch 28, a normally closed contact 46 opened / closed by an exciting coil 38, an exciting coil 48, and a lower limit switch 50 opened when the shutter curtain reaches the lower limit position. Is connected to the auxiliary limit switch 42. Further, the other end of the stop button switch 26 is connected between the open button switch 24 and the normally closed contact 36 via a normally open contact 52 which is opened and closed by an exciting coil 38, and is opened and closed by an exciting coil 48. A normally open contact 54 is connected between the close button switch 28 and a normally closed contact 46. In addition, the U-phase is provided between the open button switch 24 and the normally-open contact 52 via an interlock switch 56 that is opened and closed in conjunction with the open button switch 24 and an interlock switch 58 that is opened and closed in conjunction with the stop button switch 26. Connected to wire 30. In addition, in parallel with the auxiliary limit switch 42, the interlock switch 60 that opens and closes in conjunction with the auxiliary limit switch 42 and the interlock switch 62 that opens and closes in conjunction with the close button switch 28.
A series circuit consisting of and is connected.

The U-phase electric wire 30, the V-phase electric wire 32, and the W-phase electric wire 34 are connected to the motor 22. The U-phase electric wire 30 is provided with a normally open contact 64 which is opened and closed by the exciting coil 38, and the W-phase electric wire 34 is also provided with a normally open contact 66 which is opened and closed by the exciting coil 38. The normally open contact 66 of the W-phase electric wire 34 and the motor 22 are connected to the U-phase electric wire 30 via the normally-open contact 68 which is opened and closed by the exciting coil 48, and the normally-open contact 64 of the U-phase electric wire 30 and the motor 22. 22 is connected to the W-phase power source 34 via a normally open contact 70 which is opened and closed by the exciting coil 48. The brake 14 described above is connected to the U-phase electric wire 30 and the W-phase electric wire 34.

The operation of the first embodiment will be described below. When the open button switch 24 of the controller 18 is closed, the W-phase electric wire is transferred from the U-phase electric wire 30 through the stop button switch 26, the open button switch 24, the normally closed contact 36, the exciting coil 38, the upper limit switch 40, and the auxiliary limit switch 42. Since a current flows through 34, the exciting coil 38 is excited. As a result, the normally open contact 52, the normally open contact 64, and the normally open contact 66 are closed, the braking operation of the brake 14 is released, and the motor 22 is rotated in the direction to the upper limit of the shutter curtain. Even if the release button switch 24 is opened in this state, the current flows through the exciting coil 38 via the normally open contact 52, so that the operation of the motor 22 is maintained. When the shutter curtain reaches the upper limit position, the upper limit switch 40 is opened and the supply of electric power to the motor 22 and the brake 14 is stopped, so that the movement of the shutter curtain is stopped.

When the close button switch 28 is closed, the stop button switch 26, the close button switch 28, and the normally closed contact are connected from the U-phase electric wire 30.
A current flows through the W-phase electric wire 34 via the 46, the exciting coil 48, the lower limit switch 50, and the auxiliary limiting switch 42, so that the exciting coil 48 is excited. As a result, the normally-open contact 68, the normally-open contact 70, and the normally-open contact 54 are closed, the braking operation of the brake 14 is released, and the motor 22 is rotated in the downward direction of the shutter curtain. When the shutter curtain reaches the lower limit position, the lower limit switch 50 opens and the motor
Since the supply of electric power to 22 and the brake 14 is stopped, the movement of the shutter curtain is stopped.

Further, when the stop button switch 26 is opened while the motor 22 is rotating, the excitation coil 38 or the excitation coil 48 is demagnetized and the supply of electric power to the brake 14 and the motor 22 is stopped, so that the shutter curtain is moved. Is stopped.

When a DC 24V voltage is applied to the automatic closing device 80 by a fire signal from a fire alarm or a pseudo fire signal at the time of a fire fighting inspection, the automatic closing device 80 operates and a predetermined power is supplied to the brake 14. As a result, the braking operation of the brake 14 is released, and the shutter curtain 10 descends due to its own weight.
As a result, the lower limit switch 50 is opened, and the shutter curtain 10 is further extended from the winding shaft 23 more than usual, so that the auxiliary limit switch 42 is opened.
The interlocking switch 60 is closed. Auxiliary limit switch 42
Since the open button switch 24 and the close button switch 28 are closed, the excitation coil 38 and the excitation coil are closed.
48 is not excited and motor 22 is not rotated. When the automatic closing device is restored in the above state and the open button switch 24, the stop button switch 26 and the close button switch 28 are simultaneously operated, the interlocking switch 58, the interlocking switch 56 and the interlocking switch 62 are closed. As a result, a current flows from the U-phase electric wire 30 to the W-phase electric wire 34 through the interlocking switch 58, the interlocking switch 56, the normally-closed contact 36, the exciting coil 38, the upper limit switch 40, the interlocking switch 60, and the interlocking switch 62. The coil 38 is excited, power is supplied to the motor 22 and the brake 14 in the same manner as above, and the shutter curtain is raised. With the rise of the shutter curtain, the auxiliary limit switch 42 is restored. As a result, the auxiliary limit switch can be restored by a special operation different from the normal operation of the operating device.

Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. A normally open contact 74 of the relay is connected between the exciting coil 38 and the upper limit switch 40, and between the auxiliary limit switch 42 and the point Q on the W-phase electric wire 34 side. One end of the exciting coil 72 that opens and closes the normally open contact 74 is connected to the DC power source, and the other end of the exciting coil 72 is connected to the collector of the transistor 76. The emitter of transistor 76 is grounded and its base is a microcomputer.
Connected to 78. The normally open contact 74 and the auxiliary limit switch 42 are connected to a microcomputer 78, and the connection point P between the open button switch 24 and the normally closed contact 36 is connected to the microcomputer 78.

The control routine of the second embodiment will be described below with reference to FIG. This routine is executed by an interrupt every time the release button switch 24 is closed. When the open button switch 24 is closed, the potential of the connection point P changes. Therefore, by determining whether or not the potential has changed by the microcomputer 78, it can be determined whether or not the open button switch 24 is closed. . Release button switch 24
When is closed, the control routine is activated and step 100
At, it is determined whether the auxiliary limit switch 42 is opened. If the auxiliary limit switch 42 is opened, current does not flow to the Q point even if the release button switch 24 is closed. Therefore, it is determined whether the auxiliary limit switch 42 is open by determining whether or not the current flows to the Q point. Can be judged. When the auxiliary limit switch 42 is open, the count value C is incremented in step 102, and it is determined in step 104 whether or not the count value C has become a predetermined value (for example, 3) or more. When the count value is less than the predetermined value, this routine is terminated and the process returns to the main routine, and when the count value becomes the predetermined value or more, that is, when the auxiliary limit switch 42 is opened, the release button switch 24 is operated a predetermined number of times ( For example, 3
When it is closed, the transistor 76 is turned on at step 106. As a result, the exciting coil 72 is excited and the normally open contact 74 is closed. Therefore, from the U-phase wire 30, stop button switch 26, open button switch 24, normally closed contact
Since a current flows through the W-phase electric wire 34 through the 36, the exciting coil 38, and the normally open contact 74, the exciting coil 38 is excited, the motor 22 is rotated, and the shutter curtain is raised.

At the next step 108, it is judged whether or not the auxiliary limit switch 42 is restored by judging whether or not the current flows to the point Q, and when the auxiliary limit switch 42 is restored, that is, when the auxiliary limit switch 42 is closed, the step 108 is performed. At 110, transistor 76 is turned off.
As a result, the auxiliary limit switch can be restored by a special operation different from the normal operation of the operating device.

In the above, the normally open contact 74 is closed when the open button switch 24 is operated a predetermined number of times, but when the close button switch 28 is closed a predetermined number of times or the number of combinations of the open button switch 24 and the close button switch 28 is increased. Normally open contact
74 may be closed. Alternatively, the code may be input while the button switch of the operation device is open / closed, and the normally open contact 74 may be closed when the code reaches a predetermined code.

[Brief description of drawings]

1 is a circuit diagram of a first embodiment of the present invention, FIG. 2 is a schematic diagram of an electric shutter to which the present invention is applicable, FIG. 3 is a circuit diagram of a second embodiment, and FIG. 4 is a second embodiment. 6 is a flowchart showing an example control routine. 10 …… Shutter curtain, 18 …… Operator, 42 …… Auxiliary limit switch.

Claims (1)

(57) [Scope of utility model registration request] 1. An electric shutter in which a brake is released in an emergency, and a shutter curtain wound around a predetermined winding shaft moves in a closing direction by its own weight, and the shutter curtain opens and closes when electric power is supplied. The opening / closing switch that moves the shutter curtain of the controller, and the controller that controls the opening and closing of the shutter curtain of the controller so that power is supplied to the switch based on the normal operation. The shutter breaker is activated when the shutter curtain is extended more than usual from the winding shaft, and the circuit breaker that shuts off the power supply to the switchgear and the actuator differ from the normal operation when the circuit breaker is activated. And a return means for returning the circuit breaker to a non-operating state by supplying electric power to the switch when the special operation is performed and moving the shutter curtain in the opening direction. Electric shutter.