JP2007077719A - Automatic reset type automatic closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic closing device capable of being operated and reset by an instant application of power. <P>SOLUTION: The automatic closing device consists of a motor 80 having a lock function, a brake release means 84 capable of being reciprocated, a means 86 shutting off power to the motor after the brake release, a non-excitation type electromagnetic brake 81 and a reset means 87 returning the brake release means to an original position. The non-excitation type electromagnetic brake 81 is interlocked and rotated together with the motor in the case of non-power application to move the brake release means, and the lock with the motor is disconnected in the case of power application to become a rotatable state. A means for holding a brake releasing state consists of a motor lock function and a holding force of the non-excitation type electromagnetic brake in the case of non power application. The brake reset means consists of an energizing means to the non-excitation type electromagnetic brake and the reset means 87. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an automatic closing device in a shutter device.

Conventionally, a so-called harm prevention interlocking repeater is known as an electric shutter control device. In the event of a fire, the interlocking repeater for hazard prevention uses a self-closing device to lower the weight of the shutter curtain to prevent the fire from spreading through an automatic closing device, and when an obstacle is detected during the weight drop of the shutter curtain. First, the weight drop of the shutter curtain is stopped via the evacuation stop device.

The conventional automatic closing device is an energized operation type automatic closing device, and the energized state is maintained even when the shutter curtain is lowered by its own weight. When the seat plate switch is operated, the energization to the automatic closing device is interrupted by the stop device at the time of evacuation. It has a structure. For example, Patent Document 1 discloses a brake for braking a self-weight drop of a shutter curtain, an automatic closing device that is energized based on the detection of a smoke detector and releases the brake, and detects an obstacle. There is disclosed a seat plate switch and a switch contact that stops energization of an automatic closing device based on obstacle detection and urgently stops its own weight drop.

The interlocking repeater for hazard prevention usually uses a commercial power supply, but in the event of a power failure, the electric power from the battery power supply built into the interlocking relay for harm prevention can be used to control various types of electric shutters (the shutter curtain with an automatic closing device). Including descent). However, in this method, stable operation is possible when commercial power is supplied or when the battery is in a certain condition. However, in the event of a power failure and battery exhaustion, a fire detection signal is received. However, since the automatic closing device cannot be operated by energization, there is a problem that “it does not function as a specific fire prevention equipment”. Moreover, since the energization operation type automatic closing device maintains the energized state even during the descent of the shutter curtain by its own weight, there is a problem that the battery is easily consumed accordingly.
JP 2000-34876 A

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic closing device that operates by instantaneous energization to release a brake of a switch. Another object of the present invention is to provide an automatic closing device for returning a released brake by instantaneous energization.

The automatic closing device adopted by the present invention includes an electric motor driven by energization by a brake release signal, means for releasing a brake lever by driving the electric motor, means for interrupting energization to the electric motor after releasing the brake, It comprises means for holding the brake released state in a non-energized state after the power supply to the electric motor is cut off, and brake return means for releasing the brake released state based on a brake return signal.

In one preferable aspect, the electric motor is a motor having a lock function, and the brake release means is movable between one direction for releasing the brake and the other direction for returning the brake. The self-closing device is a non-excited electromagnetic brake that locks with the electric motor when it is not energized and rotates integrally to move the brake release means, and when energized, the lock with the electric motor is released and it can rotate. And a return means for moving the brake release means in the other direction. The means for holding the brake released state includes a lock function of the motor and a holding force of the non-excitation electromagnetic brake when not energized. The brake return means includes an energization means for a non-excited electrode brake and the return means. In one aspect, the movable brake releasing means can reciprocate between one direction for releasing the brake and the other direction for returning the brake. The movable brake releasing means also includes a wire that can be pulled out and retracted so that one end is fixed to the brake lever and the other end is wound by an electric motor. Moreover, in one aspect, the means for interrupting energization to the electric motor after releasing the brake is a micro switch. In the present invention, as soon as the micro switch is turned on, the energization to the electric motor is cut off and the rotation of the electric motor is stopped. Therefore, when the micro switch is turned on, the stop position of the brake lever release means is determined. Therefore, if it is necessary to adjust the position or amount of movement of the brake lever release means, adjust the position of the micro switch (for example, make the micro switch variable in the direction of movement of the brake lever release means). It can be done easily.

More preferably, the motor having the locking function is a worm geared motor having a self-locking function, and the means for maintaining the brake released state includes a self-locking function of the worm geared motor and a non-excitation when deenergized. Holding force of the electromagnetic brake. In place of the worm geared motor having a self-locking function, a motor having a locking function may be configured from a motor with a brake.

In the present invention, it is possible to significantly reduce the power consumption during operation by adopting an automatic closing device that releases the brake and returns the brake by instantaneous energization instead of the energization operation type. Thus, it is possible to avoid the malfunction of the automatic closing device due to the battery exhaustion “not functioning as a specific fire prevention equipment”.

In the conventional automatic closing device, when the battery is deteriorated, when the battery is continuously energized, the battery voltage drops greatly. However, the automatic closing device according to the present invention reduces the power consumption during operation by operating instantaneously. And battery consumption is low.

Since it is an instantaneous operation system that operates by instantaneous energization, it is also possible to operate the automatic closing device with a fire signal (DC24V) from an automatic fire alarm facility (disaster prevention panel) at the time of power failure and battery consumption. In one specific aspect, the control device (hazard prevention interlock repeater) that has received the fire signal determines whether or not a power failure has occurred and the battery has been consumed. Supply directly to the automatic closing device via the control device.

[A] Overall Configuration of Shutter Device First, the overall configuration of the shutter device in which the automatic closing device according to the present invention is adopted will be described. 1 and 2, reference numeral 1 denotes an electric shutter installed in an opening. A shutter curtain 2 constituting the electric shutter 1 is guided by guide rails 3 and 3 having both edge portions provided on both sides of the opening. In this state, it is changed into a closed posture in which the opening is lifted up and down to close the opening, and a storage posture in which the opening is opened by being wound in a shutter case (not shown) provided on the ceiling back 4 above the opening. It is configured to be visible.

An opening / closing device 5 for moving the shutter curtain 2 up and down by rotating a winding shaft (not shown) is disposed on the ceiling 4. The opening / closing device 5 includes a shutter control panel 5 a and a fully opened state of the shutter curtain 2. A limit switch 6 for detecting the fully closed state and an automatic closing device 8 for dropping the shutter curtain 2 by its own weight based on a signal output by the fire detection of the smoke detector 7 are provided. A disaster prevention panel 10 and a manual operation unit 11 to be described later are disposed on the walls 9 and 9 positioned on the sides of the guide rails 3 and 3. The opening / closing machine 5 (shutter control panel 5a), limit switch 6, smoke detector 7, automatic closing device 8, disaster prevention panel 10 and manual operation unit 11 are also controlled by a control device (hazard prevention interlock) disposed on the ceiling 4 The control device 12 is responsible for various opening / closing controls of the shutter device. The control device 12 controls the opening / closing device 5 through the shutter control panel 5a by the operation from the manual operation unit 11, and moves the shutter curtain 2 up and down. Further, in the event of a fire, the control device 12 releases the brake of the switch 5 via the automatic closing device 8 based on the signals from the smoke detector 7 and the disaster prevention panel 10 and lowers the shutter curtain 2 by its own weight. When the fire is prevented from spreading and an obstacle is detected while the shutter curtain 2 is descending, the descent of the shutter curtain 2 is stopped by wired obstacle detection as described below.

The seat plate 2a provided at the lowermost end of the shutter curtain 2 has a seat plate switch 2b, and when there is an obstacle below the shutter curtain 2 during the lowering operation, this is connected to the seat plate switch 2b. It detects by contact, transmits an obstacle detection signal to the control device 12 through the signal line A, and stops the descent of the shutter curtain 2 via the shutter control panel. When the shutter curtain 2 is falling under its own weight, the released brake returns based on the obstacle detection signal. After the obstacle is removed, the shutter curtain 2 starts to descend again. The signal line A connected to the seat plate switch 2b is wound around the cord reel 13 attached at the upper end of the opening while holding the urging force in the winding direction. The signal line A is wound around the cord reel 13 or is fed out in accordance with the up-and-down driving.

The control device 12 has a built-in battery power supply 14 to ensure control operation during a power failure, in addition to the commercial power source during normal operation. However, the shutter curtain 2 can be lowered by the battery power source 14 via the automatic closing device 8 based on the fire detection signal.

As shown in FIG. 3, the manual operation unit 11 includes a vertical rectangular front surface 15 and a panel 15 a provided in the front surface 15. A plastic cover 16 labeled “push” is provided below the front surface portion 15, and an openable / closable door 17 with a key that can be opened and closed is provided above the plastic cover 16. An emergency operation switch is disposed on the inner side of the plastic cover 16. The panel 15a is concealed by the open / close door 17. The panel 15a is provided with an up switch 18, a down switch 19 and a stop switch 20, and a disaster prevention system is provided on the side of these switches. A recovery switch 21 for returning the control device 12 of the electric shutter 1 that has been switched to the automatic closing mode upon receiving a disaster prevention signal input from the panel 10 to a normal manual operation mode, and a light emitting LED 22 as a light emitting unit are provided. ing. The voltage state of the battery power supply 14 is displayed on the light emitting LED 22. A transparent window 17a is formed in the keyed opening / closing door 17 at a position corresponding to the light emitting LED 22, so that the light emission state of the light emitting LED 22 can be confirmed through the transparent window 17a even when the keyed opening / closing door 17 is closed. It has become. In this way, the manual operation unit 11 has a function as a battery checker.

[B] Automatic closing device [B-1] Configuration of automatic closing device The automatic closing device 8 will be described. In the opening / closing control of the shutter device, when the control device (danger prevention interlocking repeater) 12 receives a fire signal from the disaster prevention panel 10, the control device 12 enters the automatic closing mode and is automatically closed by energization from the control device 12. The device 8 is actuated to release the brake part of the switch 5 and the shutter 2 is lowered to partition the fire prevention area. Immediately after the brake is released, power to the motor is cut off. The automatic closing device 8 according to the present invention is characterized in that the brake release state of the opening / closing machine 5 is maintained in a state where no electricity is applied even after the energization of the motor of the automatic closing device 8 is cut off. When an obstacle comes into contact with the seat plate 2 at the lower end of the shutter curtain 2 that descends its own weight, an obstacle detection signal is transmitted from the seat plate switch 2a to the control device 12, and the control device 12 that has received the obstacle detection signal. The brake of the opening / closing machine 5 is reset by a command from

As shown in FIG. 3, the automatic closing device 8 includes a box-shaped casing 8a and mechanical elements provided in the casing 8a. The mechanical elements include a DC worm geared motor 80, a non-excitation electromagnetic brake 81, and the like. , A pinion 82 and a rack 83, a brake lever release body (brake release means) 84, a microswitch (means for interrupting energization of the motor) 86, and a return spring (return means) 87. Reference numeral 85 denotes an opening / closing machine brake lever mounted on the opening / closing machine 5 side.

The worm geared motor 80 includes a motor unit 800 and a worm gear unit 801. The shaft of the motor unit 800 and the shaft of the worm gear unit 801 are orthogonal to each other, and the extended portion of the shaft of the worm gear unit 801 constitutes the output shaft 80 a of the motor 80. The worm geared motor 80 is a worm geared motor having a self-locking function. It is known that a worm gear having a predetermined reduction ratio has a self-locking function, and the reverse rotation from the output shaft can be prevented by the self-locking function of the worm gear.

The electromagnetic brake 81 includes a main body 810 including an electromagnetic coil and a compression spring (not shown), a fixing plate 811, an armature 812, and a rotor 813. The output shaft 80a of the motor 80 is connected to the rotor 813 so as to be integrally rotatable. The non-excitation electromagnetic brake itself is known, and when the non-excitation state is not energized, the armature 812 is pressed against the rotor 813 by the spring force of the compression spring, and the rotor 812 is sandwiched between the armature 812 and the fixed plate. When the energized state is energized, the armature 812 is attracted and pulled away from the rotor 813 to release the brake operation. When the power is not supplied, the main body 810 and the rotor 813 are locked, and the output shaft 80a, the rotor 813, and the main body 810 (and the fixed plate 811 and the armature 812) rotate as the motor 80 rotates. When energized, the locked state is released, and the main body 810 (and the fixed plate 811 and the armature 812) can rotate independently of the rotor 813 and the output shaft 80a.

A pinion 82 is fixed to the main body 810, and the pinion 82 is rotated by the rotation of the main body 810. As the pinion 82 rotates, the rack 83 meshing with the pinion 82 moves straight in the brake releasing direction. A brake lever release body 84 is fixed to the rack 83, and the brake lever release body 84 starts to push the brake lever 85 as the rack 83 moves. When the brake lever releaser 84 moves by a predetermined amount, the contact piece 840 formed integrally with the brake lever releaser 84 comes into contact with the microswitch 86, the microswitch 86 is turned on, and the power supply to the motor 80 is cut off. .

In a state where the power supply to the motor 80 of the automatic closing device 8 is cut off, the spring force of the return spring 87 is overcome by the self-locking function of the worm geared motor 80 and the holding force of the non-excitation electromagnetic brake 81, The rotation of the main body 810 of the excitation electromagnetic brake 81 is restricted. In this state, when the non-excited electromagnetic brake 81 is energized from the control device 12 that has received the obstacle detection signal, the lock between the main body 810 and the rotor 813 is released, and the main body 810 can be rotated and compressed. The rack 83 and the brake lever release body 84 are restored by the elastic force of the restored spring 87, the opening / closing machine brake lever 85 is restored by the restoration spring 85a, and the brake of the opening / closing machine 5 is restored. A brake lever release body 84 as a brake release means is reciprocally movable between a direction of releasing the brake and a direction of returning the brake by the rack 83.

FIG. 4 shows the control circuit of the automatic closing device. The start signal (DC24) is energized (brake release signal) to the worm geared motor 80 of the automatic closing device 8 from the control device (danger prevention interlocking repeater) 12 that has received the fire detection signal, and the motor 80 rotates. As the motor 80 rotates, the brake lever release body 84 moves in the brake release direction to release the brake of the switch 5, and the brake lever release body 84 moves a predetermined amount to turn on the micro switch 86. Thus, the energization of 24V DC is cut off and the motor 80 is stopped. When the micro switch 86 is turned on, the micro switch 86A is closed at the same time, a closed circuit is formed by the terminal SDC and the terminal DA1, and a signal indicating that the shutter curtain 2 is falling under its own weight is transmitted to the control device 12. . When receiving such a signal, the control device 12 stops supplying the activation signal (DC 24 V) to the automatic closing device 8. In addition, you may perform the stop of supply of the starting signal (DC24V) from the control apparatus 12 to the automatic closing apparatus 8 with a timer, without using a microswitch.

When the obstacle detection signal is transmitted from the seat plate detection switch to the control device (danger prevention interlocking repeater) 12, the control device 12 that has received the obstacle detection signal sends a non-excitation electromagnetic brake 81 to the non-excitation electromagnetic brake 81 for a predetermined time, for example, The DC 24V is energized (brake return signal) for about 0.5 seconds to 1 second, and the main body 810 becomes rotatable, and the brake lever release body 84 moves by the spring force of the return spring 87. 5 brake is restored. At the same time, the micro switch 86 is restored, and the micro switch 86A is opened at the same time, and the control device 12 detects that the shutter curtain 2 is not descending its own weight. When the obstacle is removed, the control device 12 detects that the obstacle has been removed via the seat plate switch 2a. After detecting that the obstacle has been removed, the activation signal (DC24) is energized from the control device 12 to the automatic closing device 8 after a predetermined time, for example, 10 to 20 seconds. By energizing the motor 80, the brake of the switch 5 is released as described above, and the shutter curtain resumes its own weight drop.

[B-2] Operation of the automatic closing device The operation of the automatic closing device will be described.
[B-2-1] Automatic Closing Device Release Operation (1) When the activation signal (DC24V) from the control device (danger prevention interlocking relay) 12 is supplied to the DC worm geared motor 80, the output shaft 80a is illustrated. In the example, it starts to rotate counterclockwise. At the same time, the main body 810 of the non-excitation electromagnetic brake 81 also rotates, and the pinion 82 fixed to the main body 810 rotates counterclockwise.
(2) Due to the rotation of the pinion 82, the rack 83 engaged with the pinion 82 starts to move in the brake releasing direction, and the brake lever release body 84 connected to the rack 83 starts to push the opening / closing machine brake lever 85. Thereby, the brake of the opening / closing machine 5 is released.
(3) After releasing the opening / closing brake lever 85 by operating the brake lever release body 84, the micro switch 86 is turned on by the contact piece 840 of the brake lever release body 84, the power supply to the motor 80 is cut off, and the motor 80 stops. To do.
(4) After stopping, with the self-locking function of the DC worm geared motor 80 and the holding force of the non-excitation electromagnetic brake 81 when de-energized, the brake released state is maintained without consuming electric power.
(5) When the micro switch 86 is turned on, the micro switch 86A is closed, and the control device 12 detects that the shutter curtain 2 is descending its own weight, and generates a start signal (DC24V) to the automatic closing device 8. Stop supplying.

[B-2-2] Returning operation of the automatic closing device (1) When DC 24V is applied to the non-excited electromagnetic brake 81 from the control device (danger prevention interlocking relay) 12 based on the obstacle detection signal, The excitation type electromagnetic brake 81 is released, and the main body 810 is rotatable.
(2) The rack 83 is instantaneously returned to the original position by the force of the return spring 87 that has been compressed when the brake is released.
(3) The brake lever release body 84 held is also returned to the original position, and the opening / closing machine brake lever 85 is also returned by the return spring 85a.
(4) At this time, the pinion 82 meshing with the rack 83 and the main body 810 of the non-excitation electromagnetic brake 81 fixed to the pinion 82 also rotate clockwise to return to the original position.
(5) With the movement of the rack 83, the brake lever release body 84 moves, the micro switch 86 returns, the micro switch 86A is opened, and the control device 12 detects that the shutter curtain 2 is not descending its own weight.
(6) When the obstacle is removed, the control device 12 detects through the seat plate switch 2a that the obstacle has been removed. After detecting that the obstacle has been removed, the activation signal (DC24) is energized from the control device 12 to the automatic closing device 8 after a predetermined time, for example, 10 to 20 seconds. By energizing the motor 80, the brake of the switch 5 is released as described above, and the shutter curtain resumes its own weight drop.

As described above, the automatic closing device according to the present invention operates by instantaneous energization to release the brake of the switch, and returns the released brake by instantaneous energization. By using an automatic closing device that can be activated and restored by instantaneous energization, it is possible to greatly reduce the power consumption during operation, and the conventional malfunction of the automatic closing device due to battery consumption It is possible to avoid the danger of “not functioning as a fire prevention facility”. Since it is an instantaneous operation system that operates by instantaneous energization, it is also possible to operate the automatic closing device with a fire signal (DC24V) from the automatic fire alarm facility at the time of power failure and battery consumption.

The present invention can be used as an automatic closing device in an electric shutter.

It is a whole perspective view of the electric shutter which adopted the control device of the present invention. It is a block diagram which shows the connection state of a control apparatus. It is a figure which shows the automatic closure apparatus which concerns on this invention. It is a control circuit of an automatic closing device.

Explanation of symbols

2 Shutter curtain 8 Automatic closing device 80 Worm geared motor 81 Non-excitation electromagnetic brake 82 Pinion 83 Rack 84 Brake lever release fitting 85 Opening and closing brake lever 86 Micro switch 87 Return spring 12 Control device (Linkage relay for harm prevention)

Claims (3)

An electric motor driven by energization by a brake release signal;
Means for releasing the brake lever by driving the electric motor;
Means for shutting off power to the electric motor after releasing the brake;
Means for maintaining the brake release state in a non-energized state after the energization of the electric motor is interrupted;
Brake return means for releasing the brake release state based on the brake return signal;
An automatic closure device consisting of The electric motor is a motor having a lock function,
The brake release means is movable between one direction for releasing the brake and the other direction for returning the brake,
The automatic closing device includes:
A non-excited electromagnetic brake that locks with the electric motor when de-energized and rotates integrally to move the brake release means, and is unlocked and unlocked with the electric motor when energized;
Return means for moving the brake release means in the other direction;
Have
The means for holding the brake released state includes a lock function of the motor and a holding force of a non-excitation electromagnetic brake when de-energized.
The brake return means is a means for energizing an unexcited electrode brake, the return means,
The self-closing device according to claim 1, comprising: The motor having the lock function is a worm geared motor having a self-lock function,
The means for maintaining the brake released state is:
The self-locking function of the worm geared motor, the holding power of the non-excitation electromagnetic brake when de-energized,
The self-closing device according to claim 2, comprising:

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