JPH0443598Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a safety device for an electric shutter for construction that is installed in an opening of a structure such as a building.

[Problems to be solved by the prior art and the invention]

Generally, this type of safety device for electric shutters has a transmitter located on the seat plate that sends a stop signal to a receiver on the shutter case side in response to the ON/OFF status of an obstacle detection switch installed at the lowest end of the shutter curtain. There is one equipped with one, and this one is designed to operate using a battery as a power source. However, in the past, the above-mentioned batteries had to be replaced as they wore out, which meant frequent inspections, which was very troublesome, and there was also the risk of an accident occurring if the shutter was operated with a dead battery. It was becoming.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a safety device for electric shutters for construction that can eliminate these drawbacks. The shutter curtain moves up and down,
In an electric shutter equipped with a transmitter that sends an emergency stop signal to the elevation control mechanism, a roller that rollably contacts the guide rail and a generator that generates electricity by the rolling of the roller are provided on the shutter curtain side, The transmitter is characterized in that the transmitter is operated by the power generated by the generator as the shutter curtain moves up and down.

With this configuration, the present invention enables the transmitter to operate without using a battery, which requires troublesome maintenance and inspection, and enables a safe and reliable emergency stop of the electric shutter.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings. In the drawing, 1 is a shutter curtain of an electric shutter;
By the driving force of the electric motor 2 operated by the command from the lift control mechanism A, the shutter is transformed into a storage position where it is wound inside the shutter case 3 and a closed position where it hangs down under the guidance of the guide rail 4. Although the openings are opened and closed, these structures are the same as before.

Reference numeral 5 denotes a seat plate attached to the lower end of the shutter curtain 1, and a box body 5a that can freely protrude and retract from the bottom of the seat plate 5 is fitted into the seat plate 5, and detects the protrusion and retraction of the box body 5a. Turn on detection switch 6,
When it is OFF, a transmitter 7, which will be described later, is activated.

On the other hand, 8 is a generator installed inside a case body 9 fixed to the seat plate 5, and a protruding shaft 8a of this generator 8
is the case body 9 with the gears 8b and 10a interposed.
The rotating shaft 10 is rotatably supported by a rotary shaft 10, and a roller 10b that contacts the inner surface 4a of the guide rail 4 is mounted on the rotary shaft 10. Then, as the shutter curtain 1 moves up and down, the roller 10b moves to the inner surface 4a.
By rolling the generator 8, the generator 8 is activated to generate electricity, and the transmitter 7 is designed to operate using this as a power source. Note that 5b is a steady-rest roller for the shutter curtain 1.

Next, a circuit diagram of the safety device shown in FIG. 4 will be explained. This circuit is on the transmitting side provided in the shutter curtain 1, and includes a generator 8, a detection switch 6, a transmission control circuit 11, a capacitor C, a diode D, a light emitting diode LED, a transistor Tr, a resistor R, and a variable resistor. It consists of VR etc. When the shutter opens and closes, the generator 8
When the capacitor C generates electricity, the capacitor C is stored, but when the detection switch 6 is turned on due to an obstacle, electricity flows from the capacitor C to the transmission control circuit 11, and the transmission control circuit 11 becomes a transistor.
Specified signal (long/short, intermittent signal, etc.) to the base terminal of the Tr
, the light emitting diode LED emits a predetermined optical signal toward the receiver 12 on the shutter case 3 side.

In the embodiment of the present invention configured as described above, when a command to lower the shutter curtain 1 is issued from the elevation control member A, the electric motor 2 is driven in response to this command to lower the shutter curtain 1.
will be lowered, but during the lowering operation, the roller 10b will roll within the guide rail 4 to operate the generator 8, and this power generation will also store electricity in the capacitor C. . When the lowering of the shutter curtain 1 is obstructed by an obstacle, the box body 5a of the seat plate 5 comes into contact with the obstacle and sinks in, and the detection switch 6 detects this. The transmitter 7 sends a stop signal to the receiver 12, which causes the elevator control mechanism A to stop lowering the shutter curtain 1. At this time, the transmitter 7 uses the power stored in the capacitor C to It will work.

As described above, in the present invention, the transmitter 7 sends a stop signal to the receiver 12 in order to emergency stop the lowering of the shutter curtain 1, and the generator 8 generates electricity using the lowering operation of the shutter curtain 1. Since it is operated by the transmitter, there is no need for a battery to operate the transmitter as in the past, and troublesome work such as battery replacement and consumption inspection is eliminated.
Shutter maintenance and inspection work can be greatly simplified. Moreover, since the transmitter 7 does not become inoperable due to a dead battery, etc., there is no risk of operating the shutter without the transmitter 7 being activated, which is extremely reliable. Can be a high safety device.

It should be noted that the present invention is of course not limited to the above-mentioned embodiment. For example, contrary to the above-mentioned embodiment, when the shutter is in operation, the transmitter continuously generates a signal due to the power generated by the generator. If the shutter stops due to an obstacle (stops power generation) or the detection switch detects an obstacle, the signal transmission is cut off, and the receiver detects this signal interruption and stops the shutter operation. You can. However, in this case, it is not possible to generate and transmit power at the same time as the shutter starts, so as shown in Figure 5 A and B, a timer is set to operate for a certain period of time from the time of start, regardless of whether transmission occurs or not. Preferably, a circuit is provided. In this case, since the shutter operation (electric motor) is stopped by stopping the generator when the shutter stops, the detection switch and upper/lower limit switch on the seat plate can be omitted. .

[Function and Effect] In summary, the present invention is constructed as described above, and although it is intended to make an emergency stop of the shutter by transmitting a signal from a transmitter installed on the shutter curtain that moves up and down, it is possible to The machine is operated by a generator that generates electricity using the up and down movement of the shutter curtain, instead of using batteries that require troublesome work such as replacing and checking for wear and tear as in the past, making maintenance and inspection easier. This greatly simplifies the work, and also ensures that the situation where the shutter is operated when the transmitter is not working due to a dead battery, as was the case in the past, is prevented. It becomes an extremely reliable safety device.

[Brief explanation of the drawing]

The drawings show an embodiment of the safety device for an electric shutter for construction according to the present invention, in which Fig. 1 is a schematic front view of the electric shutter for construction, and Fig. 2 is a partially cutaway front view of the main parts. , Figure 3 is a cross-sectional view of the same as above,
FIG. 4 is a circuit diagram of the transmitting side, and FIGS. 5A and 5B are time charts and block diagrams of other embodiments. In the figure, 1 is a shutter curtain, 2 is an electric motor, 4 is a guide rail, 7 is a transmitter, 8 is a generator, 10b is a roller, and A is an elevation control mechanism.

Claims (1)

[Scope of utility model registration request] In an electric shutter, a shutter curtain that moves up and down along a guide rail driven by an electric motor is provided with a transmitter that sends an emergency stop signal to the elevation control mechanism, and the shutter curtain can freely roll on the guide rail on the side of the shutter curtain. A building comprising: a roller that comes into contact with the shutter curtain; and a generator that generates electricity by the rolling of the roller; and the transmitter is operated by the generated power of the generator as the shutter curtain moves up and down. Safety device for electric shutters.