JPS6317997B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an opening/closing fixed position stopping device for an electric shutter for a building.

[Problems to be solved by the prior art and the invention] In general, the opening/closing fixed position stopping device of this type of electric shutter is achieved by a gear having a cam or a control pin. Not only is stopping uncertain, but also the adjustment operation of the limit position is troublesome, and it is necessary to eliminate these drawbacks.

Conventionally, counter-type limit switches have been known to control the stop position of rope wrists, etc., but this one has an electric rotation amount detector consisting of a light-shielding plate and a photoelectric switch in a part of the rotation drive unit. This detector is configured to operate the counter only electrically via a photoelectric relay, so even in the event of a power outage, it will work in conjunction with smoke and heat detectors to respond to emergencies such as fires. In addition, it has been practically difficult to apply it to electric shutters that require manual winding.

Therefore, it may be possible to detect the rotation of the winding body by combining the rotation of the opening/closing machine and the rotation of the input shaft of the limit switch, but in general, there are a wide variety of opening/closing machines, and these Therefore, even if the rotation of the entire opening/closing machine is coupled to the rotation of the winding body due to the drive of the electric motor, when the power is not energized,
There is a part that is connected to the rotation of the winding body and a part that is disconnected from the rotation of the winding body, and the rotation of the input shaft of the limit switch is coupled to the part that is disconnected from the rotation of the winding body. By detecting the rotation of the opening/closing machine, it is possible to count the fall of its own weight during emergency operations such as during a power outage, or the rotation of the winding body when the motor is not being driven during manual operation. figure,
Therefore, the initial count setting value becomes incorrect.
If the opening/closing operation using the electric motor is performed again, the limit setting must be re-set, which is an inconvenience, which significantly reduces the ease of maintenance.
No matter what kind of opening/closing machine is used, the electric motor drive/
There has been a demand for an electric shutter opening/closing fixed position stopping device using a counter-type limit switch that is completely unaffected by non-driving.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was created with the aim of providing an opening/closing fixed position stopping device for an electric shutter that can eliminate these drawbacks. In the electric shutter for a building, the opening is opened and closed by rotating the winding body around which the shutter curtain is wound forward and backward in a non-driving state, such as by driving an electric opening/closing machine and manually. Counter-type limit switches for upper and lower limits that detect the lifting limit of the tar curtain and automatically stop the motor are linked to the rotation of the winding body in order to follow the rotation of the winding body and measure the amount of rotation. The present invention is characterized in that it is configured to count forward and reverse rotations of the winding body when the electric motor is not driven.

With this configuration, the present invention is capable of automatically stopping the electric motor by detecting the lifting limit position of the shutter curtain, which is opened and closed by the drive of the electric motor, using a counter-type limit switch. Even if a switch is used, the amount of rotation of the winding body can be measured without being affected by the drive of the electric motor, and it can be used in emergency operations such as during power outages due to rotation from the winding body side when the motor is not driven. Even if the shutter curtain falls under its own weight or is opened/closed by manual operation, it is possible to accurately count the rotation of the winding body and detect the lifting limit position of the shutter curtain. The setting value remains as it was initially set, and there is no need to readjust the counter at all, and even if it is opened or closed by the electric motor drive operation, the lifting limit position can be reliably detected. An electric shutter that can significantly improve maintainability, and can also be applied to electric shutters that are linked to smoke detection or heat detectors stipulated by the Building Standards Act, improving safety. The purpose of this invention is to provide an opening/closing fixed position stopping device.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a shutter curtain of an electric shutter installed at an opening such as a doorway, and the shutter curtain 1 is driven by a forward and reverse drive of an electric motor 3 installed at the upper part of the opening. The winding shaft 2a constituting the winding body 2 (not shown) is rotated with the winding drum 2b, and the winding body 2 is raised and lowered into an open position where the winding body 2 is wound on the winding drum 2b, and a closed position where the winding body 2 is hung down. The opening can be opened and closed by pressing the button.

4 is a counter-type limit switch for setting the upper limit of shutter winding, and 5 is a counter-type limit switch for setting the lower limit of shutter winding. They are directly interlocked and connected via the gear 7 or via the gears 8 and 9 so as to follow the rotation of the winding body 2 and measure the amount of rotation. In order to ensure accuracy of the limit position of the shutter, the numbers displayed on the counters 4 and 5 are connected by selecting a connecting gear ratio so as to use a number of two digits or more as much as possible. In this way, the table value between the upper and lower limit positions increases, the number of rotations of the cyclometer increases, and the number of digits increases, so the error in the limit stop position of the shutter becomes small and the stop position of the shutter becomes accurate.

Although this embodiment describes an example in which the driving force of an electric opening/closing machine is used for both hoisting and lowering, other methods such as applying the weight of the shutter and using a mechanical brake in combination with the shutter are also possible. Of course, it can also be applied to

FIG. 2 is a circuit diagram of a shutter opening/closing machine driving electric motor (hereinafter simply referred to as the opening/closing machine). In this circuit diagram, 10 is a switch for opening/closing the shutter;
1 is an electric contact that automatically operates when the number displayed on the counter 5 reaches zero, and 13 is a capacitor.

Now, when the movable contact 10' of the switch 10 is put into the unwinding fixed contact 10'', the electric motor 3 rotates in the unwinding direction, and the shutter curtain 1 on the winding body 2 is rotated.
is rewound and descends. Then, when the counter 5 decrements the number and the displayed number of all the number wheels reaches "zero", the electric contact 11 opens and the electric motor 3 stops. At this time, the shutter is at the lowering limit position.

Next, to wind up the shutter, when the movable contact 10' of the switch 10 is connected to the fixed contact 10'', the electric motor 3 rotates in the winding direction, and the shutter curtain 1 is rolled up. , the displayed number of all number wheels is “0”.
When this happens, the electrical contact 12 opens and the motor 3 stops. At this time, the shutter is at the winding limit position.

To set the operating values of the counters that function as the upper limit switch and lower limit switch, the contact operation is restricted during the setting operation, and the shutter is wound up or down using an electric motor or manually. After checking the upper and lower limits individually, operate the simultaneous zero return means for each corresponding counter to make a zero payment.

In the embodiment of the present invention configured as described above, the shutter curtain 1 is raised or lowered by being wound around the winding body 2 in conjunction with the drive of the electric motor 3, and the counter-type limit switch 4 for upper and lower limits is activated. , 5 are mechanically operated to count the amount of rotation of the winding body 2 by the rotation of the input shaft of the counter. ,0,
0''), the switch contact is opened and the drive of the electric motor 3 is stopped. On the other hand, electric motor 3
When opening and closing the shutter curtain 1 by forward and reverse rotation of the winding body 2, instead of being driven by the shutter, an electric opening/closing machine 3 is used that uses the weight of the shutter to lower it. In order to lower the shutter curtain 1 by its own weight or manually roll it up, the shutter curtain 1 is closed by releasing the brake or clutch, or by manual operation in an emergency such as a power outage, and is opened by manual operation in the event of a power outage. The door is operated, but normally the entire opening/closing machine is operated by electric motor 3.
Even if there is a non-rotating part that is separated from the rotation of the winding body 2, the counter-type limit switches 4 and 5 rotate integrally with the rotation of the winding body 2. By linking the rotation of the winding body 2 so that the rotation amount of the winding body 2 is directly measured by following the rotation of the motor 3, the forward and reverse rotation of the winding body 2 when the electric motor 3 is not driven is possible. This ensures a configuration that reliably counts rotations. Therefore, no matter what type of electric opening/closing device is used, the lifting limit position of the shutter curtain 1 can be reliably detected without being affected by whether the electric motor 3 is driven or not, and this can be used in case of power outage, etc. Even when the body weight drops due to an emergency operation or when manually winding up, the counters 4 and 5 reliably count the amount of rotation of the winding body 2 in the same way as during normal operation. Since the setting remains the same, there is no need to aim for the lifting limit position of the shutter curtain, and even if the electric motor 3 is used to open/close the shutter curtain again, there is no need to re-set the limit at all, which saves maintenance. This not only improves safety, but also ensures safety in the event of accidental re-operation.

In summary, according to the present invention, the winding body around which the shutter curtain is wrapped is rotated in forward and reverse directions when an electric opening/closing machine is driven or not driven manually to open and close the opening. In the electric shutter for buildings, there is a counter type limit switch for upper and lower limits that detects the lifting limit of the shutter curtain and automatically stops the electric motor.
In order to follow the rotation of the winding body and measure the amount of rotation, it is linked to the rotation of the winding body side, and the forward and reverse rotations of the winding body are counted when the motor is not driven. However, no matter what kind of electric opening/closing machine is used, the electric motor cannot be Since the amount of rotation on the winding body side can be measured without being affected by the drive of the motor, even when the motor is not driven,
The amount of rotation of the winding body can be reliably measured, and the rotation of the winding body can be followed and counted reliably even when the body weight is lowered during emergency operations such as during power outages or during manual operation. Not only can the lifting/lowering limit position of the shutter curtain be detected, but the counter setting value remains as it was originally set, and there is no deviation in the setting value, eliminating the need to readjust the counter at all, and allowing the electric motor to be re-adjusted. The lift limit position can be reliably detected even when opened and closed by drive operation, significantly improving maintenance efficiency, and specifications that are linked to smoke detection or heat detectors stipulated by the Building Standards Act. The present invention can also be applied to electric shutters, and has the effect of improving safety.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a perspective view showing the essentials of the apparatus of the present invention, and FIG. 2 is a circuit diagram of a shutter driving electric motor. DESCRIPTION OF SYMBOLS 1... Shutter, 2... Winding body, 2a... Shutter winding shaft, 2b... Shutter winding drum, 3... Shutter winding electric motor, 4... Counter acting as a limit switch for the upper limit of shutter winding, 5... Shutter lowering Counter that acts as a limit switch, 6, 7, 8, 9... Counter drive gear wheel.

Claims (1)

[Claims] 1. In an electric shutter for a building, in which an opening is opened and closed by rotating a winding body around which a shutter curtain is wound forward and backward in a state in which an electric opening/closing machine is not driven or manually operated, the shutter curtain is Counter-type limit switches for upper and lower limits, which automatically stop the electric motor by detecting the lifting limit of the curtain, are linked to the rotation of the winding body in order to follow the rotation of the winding body and measure the amount of rotation. An opening/closing fixed position stop device for an electric shutter, characterized in that it is configured to count forward and reverse rotations of a winding body when the electric motor is not driven.