JPS588877Y2 - Automatic safety device for remote-controlled electric shutter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic safety device for an electric shutter that is remotely controlled by wireless.

Shutter devices installed at the entrances and exits of stores, garages, and warehouses are becoming increasingly sophisticated, from manual types to electric type shutters, and even electric type shutters that can be opened and closed by wireless remote control.

Electric shutter devices that are remotely controlled by wireless are very convenient, but when the shutter is being rolled up or vice versa,
None of them were able to be stopped.

For this reason, in the past, there have even been accidents in which children were killed due to the lowering shutter.

In order to avoid such accidents, it is necessary to sense the presence of some object under the lowering shutter, thereby immediately reversing the rotation of the shutter drive and raising it again.

As a result of intensive research on the above-mentioned sensing means from the standpoint of reliability and economy, the present invention has been developed by extending the shutter 1 from the completely rolled up state as shown in Figure 1a, Object X that the lower end 2 of the shutter 1 consists of
When the object X continues to be fed out even though it has been lowered due to the presence of the object To explain this phenomenon more specifically, when the object X is at a relatively high position and the shutter is turned, as shown in Figure 1, When the shutter 1 with a considerable amount of vermilion is rolled up on the shutter frame 3, it curves outward, and when the object X is at a relatively low position as shown in FIG. If the shutter 1 is not rolled up, it will curve inward, so by providing limit switches 5 and 5' on the left and right sides of the entrance of the shutter guide 4, the lower end of the shutter 1 2 collides with object X, one of the limit switches 5, 5' is activated, and it has been found that collision detection can be reliably performed with a simple configuration.

In the present invention, limit switches 5 and 5' are provided on the left and right sides of the entrance of the shutter guide 4 as described above to detect a collision, and when a danger is detected in this way, the winding is stopped using various configurations. This was devised as a result of various studies on whether to switch to .

The present invention will be explained with reference to the circuit diagram shown in FIG. 2 as follows.

In FIG. 2, T is a transformer, and on the secondary side of the transformer T, a remote control switch 6 and a ratchet relay 7, which operate by receiving a winding or unwinding command signal, are connected in series. relay 7
The movable contact 8 switches between the winding circuit A and the feeding circuit B of the motor M.

The winding circuit A has an upper limit microswitch 9, and when a predetermined winding is performed, the actuator of this upper limit microswitch 9 is turned off to open the winding circuit.
In this way, the winding is stopped.

Further, there is a lower limit microswitch 10 in the feeding circuit B, and when a predetermined feeding is performed, the actuator of this lower limit microswitch 10 is turned off to open the feeding circuit, thus stopping feeding. .

In other words, the shutter 1 is fully lowered (the upper limit microswitch 9 is closed and the lower limit microswitch 10 is open).

), when the winding command signal is received, the movable contact 8 of the ratchet relay 7 is connected as shown by the solid line by the action of the remote control switch 6, and winding by the motor M is started, and the prescribed winding is performed. By the way, the upper limit microswitch 9 is activated and stops.

In addition, the shutter 1 is fully raised (the upper limit microswitch 9 is open and the lower limit microswitch 10 is closed).

), when the command signal for feeding is received, the movable contact 8 of the ratchet relay 7 becomes tangential as shown by the two-dot chain line under the action of the remote control switch 6, and feeding by the motor M is started. A lower limit microswitch 10 is activated to stop the operation.

By the way, in the present invention, the limit switches 5, 5' are provided on both sides of the entrance of the shutter guide 4 as described above.

Switches 11 and 11' are connected to the limit switches 5 and 5' and perform the same on/off operation as the limit switches 5 and 5', and are connected to the lower limit microswitch 10 and perform the on/off operation indicated by the lower limit microswitch 10. There is an anti-theft switch 12 which operates in the same manner as the above-described circuit, and is incorporated into the circuit described above as follows.

That is, two switches 11 and 11' are connected in parallel with the remote control switch 6, and connected to the ratchet relay 7 via the anti-theft switch 12.

By having the above-described configuration, the present invention can obtain the following effects.

That is, during the lowering of the shutter 1 (the upper limit microswitch 9, the lower limit microswitch 10, and the theft prevention switch 12 are all closed).

), when the lower end 2 of the shutter 1 collides with the object , the movable contact 8, which had been connected to the winding circuit B side, is switched to be connected to the winding circuit A side, thus preventing danger.

Moreover, when the shutter 1 is fully lowered, both the lower limit microswitch 10 and the theft prevention switch 12 are open.

Therefore, even if the limit switches 5 and 5' are turned on by forcing the shutter 1,
Even if the corresponding switch 11 or 11' is turned on, the anti-theft switch 12 is in the off state, so there is no fear that current will flow through the winding circuit A.

In other words, theft prevention is also a distant relative.

[Brief explanation of the drawing]

1a, 1b, and 1c are diagrams for understanding the principle of the danger sensing means of the present invention, and FIG. 2 is an electric circuit diagram for rolling up and feeding out the shutter. 1...Shutter, 4...Shutter guide, 5゜5'...Limit switch, 6...
...Remote control switch, 7...
...Ratchet relay, 8...Movable contact, 11
．． 11'... Switch, 12... Anti-theft switch.

Claims (1)

[Scope of utility model registration request] Limit switches 5 and 5' are provided on the left and right sides of the entrance of the shutter guide 4, respectively, to detect danger by the deflection of the shutter 1, and two switches 11 and 11' that operate in the same way as the limit switches 5 and 5' are connected in parallel. connection,
A remote control switch 6 which operates by receiving a command signal is connected in series with an anti-theft switch 12 which operates in the same way as the lower limit micro switch 10 in the feeding circuit B of the motor M for raising and lowering the shutter.
This is an automatic safety device for a remote-controlled electric shutter, which is connected in parallel with a ratchet relay 7 having a movable contact 8 for switching between a winding circuit A and a feeding circuit B of a motor M.