JPH0791160A - Operating circuit structure of electric switchgear for construction - Google Patents

Abstract

PURPOSE:To decrease the capacity of a battery, and to ensure the housing space of the battery and reduce cost by operating an electric motor by the lowering load of its own weight of a shutter curtain and returning generated power through a power return path. CONSTITUTION:When a shutter curtain is brought down, an electric motor 2 receiving the lowering load of its own weight of the shutter curtain generates electricity and is operated. Power generated on the basis of generating operation is returned to a battery 5 through a power return path 13 at that time. The battery 5 is charged at the time of lowering operation, and the efficiency of usage of the battery 5 is improved. Accordingly, the battery 5 is miniaturized, and the charging method of low charging capacity such as a solar cell 6 can be used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating circuit structure for an electrically-operated switchgear for construction which is installed in an opening of a building.

[0002]

BACKGROUND OF THE INVENTION Generally,
This kind of electric opening / closing apparatus for construction is configured to open / close an opening by vertically moving an opening / closing body by a driving force of an electric motor. However, since the conventional electric switchgear is configured to drive the electric motor by using the AC power supply on the building side, it has a drawback that the electric motor cannot be opened and closed during a power failure. Therefore, it is proposed to drive the electric motor by using batteries that are charged by appropriate means, but this one consumes battery power for each opening / closing operation, and thus requires a large capacity battery, and as a result, Perhaps the problem of securing a cost-up space and a space for accommodating batteries is necessary, but the use of battery-driven electric switchgear is limited because of the need for charging means with high charging capacity.

[0003]

DISCLOSURE OF THE INVENTION The present invention was devised with the object of providing an operating circuit structure for an electric switchgear for a building which can eliminate these drawbacks in view of the above-mentioned circumstances. And open and close the opening and closing body,
In an architectural electric switchgear that is moved up and down by the driving force of an electric motor, when the electric motor is driven by a battery connected through an actuation circuit, the actuation circuit includes a load of the opening / closing body at the time of descending actuation. In response to this, an electric power return path for returning the electric power generated by the electric motor to the battery is provided. According to the present invention, the capacity of the battery can be reduced by this configuration, the cost can be reduced, the space for accommodating the battery can be easily secured, and various charging means can be used to drive the battery-driven electric motor. The purpose of the switchgear is to be greatly expanded.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a shutter curtain of an electric shutter, which is an example of an electric switchgear for construction,
The shutter curtain 1 moves up and down between an open position in which it is wound and stored in the shutter case 3 and a closed position that hangs down along a pair of left and right guide rails 4 as the electric motor 2 is driven in the reverse direction. It is transformed to open and close the opening, but the basic configuration of these is the same as before.

The electric motor 2 may be a direct current type or an alternating current type, but in this embodiment, a direct current motor is used, and this will be described later in detail.
It is designed to be driven by the current supplied from. That is, since the electric motor 2 can be driven without using the AC power supply on the building side, the shutter can be opened and closed by electric power even during a temporary power failure.

The battery 5 is composed of a nickel cadmium battery or the like and is appropriately charged by using a charging means. So-called solar cell 6 to convert into
Is being charged using.

Further, 7 is a shutter operation circuit installed in the control panel 8, and the shutter operation circuit 7 is provided in the power supply path 9 from the battery 5 to the electric motor 2 with the operation circuit 10 (the raising operation switch U). , A circuit for switching the relay contact based on the operation of the closing switch D and the stop switch S) is provided to interpose a motor drive circuit 11 for driving the electric motor 2 in the forward and reverse directions. Further, the shutter operation circuit 7 of this embodiment is such that the electric motor 2 is provided between the battery 5 and the motor drive circuit 11.
The DC / DC converter circuit 12 that boosts the applied voltage

Furthermore, 13 is a power return path provided in the shutter operation circuit 7, and the power return path 13 is arranged in parallel with the power supply path 9 to the electric motor 2
In addition to being connected to the battery 5, a diode D forming a bridge rectifier circuit and a resistor R for protecting the battery are provided in the path. That is, attention is paid to the fact that when the shutter curtain 1 is descending, the electric motor 2 that receives the load for lowering its own weight of the shutter curtain 1 starts power generation from the time when it exceeds the no-load rotation speed. The generated electric power is returned to the battery 5 via the electric power return path 13.

In the embodiment of the present invention constructed as described above, the electric motor 2 drives the shutter curtain 1 up and down by driving the battery, but when the shutter curtain 1 is moved down, The electric motor 2 that receives the downward load of its own weight of the shutter curtain 1 operates to generate electric power, and the electric power generated based on the electric power generating operation is returned to the battery 5 via the electric power return path 13. Therefore, the battery 5 can be charged during the lowering operation to significantly improve the usage efficiency of the battery 5, and as a result, the battery 5 can have a smaller capacity (smaller size) and a significant cost reduction. In addition, the space for accommodating the battery 5 can be reduced, and the space can be easily secured.

Moreover, since charging means having a lower charging capacity can be used as compared with the case of charging a battery having a large capacity, various battery charging means such as the solar cell 6 can be used for the purpose of using the battery-driven electric shutter. Can be greatly increased.

Further, in this embodiment, since the applied voltage of the electric motor 2 is boosted by the DC / DC converter circuit 12, the power generation voltage of the electric motor 2 can be increased, and as a result, the charging efficiency can be improved. The capacity of the battery 5 can be further reduced.

The present invention is of course not limited to the above-mentioned embodiment. For example, an AC electric motor 14 may be used as in the second embodiment shown in FIG.
It is also possible to charge the battery 5 with an AC power supply. That is, the second embodiment is configured to drive the electric motor 14 via the DC / AC inverter circuit 15 and perform battery charging via the charging device 16 equipped with a rectifying circuit.

[0013]

In summary, since the present invention is constructed as described above, the electric motor for vertically moving the opening / closing body is driven by the battery,
During the lowering operation of the opening / closing body, the electric motor generates electric power by receiving the weight-lowering load of the opening / closing body, and the generated electric power is returned to the battery via the electric power return path. Therefore, the efficiency of battery usage is significantly improved to enable the use of small capacity batteries. As a result, it is not possible to contribute to cost reduction, it is easy to secure the space for storing batteries, and the charging capacity is low. The charging means can be enabled to greatly increase the utility of battery-powered electric switchgear.

[Brief description of drawings]

FIG. 1 is a front view of an electric shutter.

FIG. 2 is a block circuit diagram showing a shutter operation circuit.

FIG. 3 is a block circuit diagram showing a shutter operation circuit of a second embodiment.

[Explanation of symbols]

 1 Shutter Curtain 2 Electric Motor 3 Shatter Case 4 Guide Rail 5 Battery 6 Solar Battery 7 Shutter Operation Circuit 8 Control Panel 9 Power Supply Path 10 Operation Circuit 11 Motor Drive Circuit 12 DC / DC Converter 13 Power Return Path

Claims (1)

[Claims] 1. A construction electric opening / closing device in which an opening / closing body for opening / closing an opening is moved up and down by a driving force of an electric motor, in which the electric motor is driven by a battery connected through an operation circuit. An operating circuit structure for an electric switchgear for a building, wherein the operating circuit is provided with an electric power return path for returning electric power generated by an electric motor to a battery upon receiving a load of an opening / closing body at the time of lowering operation.