JPS63261086A - Safety controller for electric shutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an electric shutter that makes an emergency stop when an obstacle is detected while the shutter curtain is lowering, and closes it in a predetermined state when there is no obstacle. The invention relates to a safety control device.

[Prior art and problems to be solved by the invention] Conventional technology 1
For example, in electric shutters where the shutter curtain is raised and lowered by remote control.

The presence of obstacles during descent is very dangerous, and to deal with this, various safety devices of this type are known. And in this thing,
For example, Japanese Utility Model Application No. 61-020790.

As shown in Japanese Utility Model Application No. 61-013797, an obstacle detector is provided at the lower end of the shutter curtain.

A landing position detector is installed in front of the landing position of the shutter curtain, and after the first landing position detector is activated, the former stops the opening/closing machine after a predetermined timer of one hour, and the latter stops the operation of the obstacle detector. There is something that is determined to be a landing. However, in the former case, when the shutter curtain stops descending after the landing position detector is activated and resumes descending again, the timer may start for one hour from the beginning, and as a result, the shutter curtain is fully opened. Since it does not stop even after that and does not stop until the timer elapses one hour, there is a drawback that a reverse winding phenomenon occurs. On the other hand, in the latter case.

When this is used for a shutter that allows the slats to move freely between a state where they are separated and a sealed state in which they are close together, after the seat plate contacts the floor surface, the shutter curtain is controlled to descend until it reaches the sealed state. This poses a problem as it has drawbacks such as the inability to

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention has been devised for the purpose of providing a safety control device for an electric shutter that can eliminate these drawbacks. includes an obstacle detection means for detecting an obstacle during the descent of the shutter curtain and causing an emergency stop of the shutter curtain; a first lowering position detection means that operates at a stage before the shutter curtain lands; and a second lowering position detecting means for detecting that the shutter curtain has been extended a predetermined distance after the lowering position detecting means is activated, and stopping the shutter curtain from lowering. The second invention is characterized in that the detection signal from the obstacle detection means is ignored after the first lowered position detection means is activated.

With this configuration, the present invention enables reliable obstacle detection and shutter curtain lowering control.

[Example] Next, in 9 drawings for explaining an embodiment of the present invention based on the drawings, 1 is a shutter curtain, 2 is a case for storing the shutter curtain 1, and 3 is a guide for vertically guiding the shutter curtain l. A rail, 4 a winding drum for winding the shutter curtain 1, 5 a shutter curtain 1
6 is a seat plate provided at the lowest end of the shutter curtain l, and 7 is an obstacle detection means (switch) attached to the lower surface of the seat plate 6, all of which are constructed in the conventional manner. ing. On the other hand, numerals 8 and 9 are first and second lowering position detection means, both of which are constructed of appropriate devices such as a limit switch, a phototube, a magnetic tape, a light emitter and receiver, etc. The detection means 8 is
When the seat plate 6 reaches an appropriate position on the near side of the floor surface, this is detected and a detection signal thereof is output to the control section 10.

Further, the second lowering position detecting means 9 further detects the shutter curtain 1 from the stage detected by the first lowering position detecting means 8.
is lowered by a predetermined distance, this is detected and a detection signal thereof is output to the control unit IO. The control unit 10 then outputs a lift control command to the control unit 10 based on the control command from the lift and stop push button switch 11 and the detection commands from the first lowering position detecting means 8 and the second lowering position detecting means 9. , and controls the drive of the opening/closing machine 5. In other words, push button switch 1
1 (or the remote control operation unit)
performs the normal opening/closing drive, but in the lowering operation of the shutter curtain l, the first lowering position detection means 8 is detected from the beginning of the lowering.
Until the operation of the shutter curtain l, the obstacle detection switch 7 detects an obstacle, and if an obstacle is detected, the lowering of the shutter curtain l is stopped in an emergency. On the other hand, when the shutter curtain is lowered to a point just before the seat plate 6 lands and the first lowered position detection means 8 detects this, the control unit 1O receives this and detects the obstacle by the obstacle detection switch 7. The detection is ignored and a command to lower the shutter curtain 1 is issued until a detection command is issued by the second lowering position detection means 9 or a stop command is issued by the push button switch 11. In addition, in the figure,
Reference numeral 12 denotes a control panel for driving the opening/closing machine 5.

In the embodiment of the present invention configured as described above, when the obstacle detection switch 7 detects an obstacle when lowering the shutter curtain l, an obstacle detection signal is issued and the opening/closing machine 5 is brought to an emergency stop. However, when the shutter curtain 1 descends safely without any obstacles and approaches the floor surface, the first lowering position detection means 8 detects that the shutter curtain 1 has descended close to the floor surface, and the controller 1 detects this.
Enter 0. The control unit 10 inputting this detection signal,
Thereafter, even if there is an obstacle detection command from the obstacle detection switch 7, it is ignored as there is no such command, and the shutter curtain 1 continues to be lowered. When the shutter curtain l is lowered by a predetermined distance from the state detected by the first lowering position detecting means 8, the second lowering position detecting means 9 detects this, and this detection signal is transmitted to the controller 1.
0, the control unit 10 stops the switch 5,
By kneading, the shutter curtain l becomes fully open.

As described above, in the present invention, during the lowering process of the shutter curtain 1, the obstacle detection switch 7 effectively detects the obstacle before the first lowering position detection means 8 detects the obstacle. However, after the shutter curtain 1 has been lowered to the point where there is no longer any danger from the obstacle, that is, after the first lowering position detection means 8 detects the lowering position, the obstacle detection switch 7 The obstacle detection signal is ignored, and the shutter curtain l is controlled to be lowered for a predetermined distance until the first lowered position detection means 9 detects it. As a result, after the lowering is stopped by operating the push button switch 11 between the detection by the first lowering position detecting means 8 and the detection by the second lowering position detecting means 9, the shutter curtain l is moved by operating the push button switch 11 again. When restarting the descent, the control is based on distance rather than time control using a timer as in the past, so the timer does not reset midway and start counting from the beginning, but continues as it is. This means that the shutter curtain 1 can be lowered and the reverse winding phenomenon can be reliably prevented.

Furthermore, the stopping of the descent when fully opened is due to the descending distance of the shutter curtain l, so for example, if the slats are used in a shutter that is connected so that it can be disguised as a separated state that allows ventilation and a sealed state that is in contact with each other, In this case, the shutter curtain 1 can be reliably controlled to descend from the fully open state at the time the seat plate 6 touches the floor to the fully open state.

Note that the present invention is not limited to the above embodiments. Of course, it is not necessary to provide two separate lowering position detecting means, and any means for detecting the first and second lowering positions may be used.

[Operations and Effects] In summary, since the present invention is constructed as described above, at the stage before the shutter curtain first lowering position detecting means is activated, the obstacle detection switch can safely operate the shutter including emergency stop. Although the curtain can be controlled to descend, after the shutter curtain has descended to a stage just before landing and the first lowering position detection means is activated, the shutter curtain will not move until the second lowering position detection means detects the shutter curtain. The lowering is stopped after being locked out by a predetermined distance. Therefore, the lowering control of the shutter curtain is not the conventional time control but the distance control after the first lowering position detection means is activated.
Even if you stop it midway, it won't reset, and like a 5-blind shutter, after the first landing, you can't close it unless you extend it the appropriate distance from the vented state to the fully open state. Reliable lowering control is possible even with a shutter that is

[Brief explanation of drawings]

The drawings show an embodiment of the electric shutter safety control method and apparatus according to the present invention, and FIG. 1 is a front view of the electric shutter, and FIG. 2 is a block diagram of the control mechanism. In the figure, l is a shutter curtain and 5 is an opening/closing machine. 7 is an obstacle detection switch, 8.9 is a first and second lowering position detection means, 10 is a control unit, and 11 is a push button switch. Patent applicant: Sanwa Shutter Industry Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] 1) Obstacle detection means for detecting an obstacle while the shutter curtain is lowering and causing an emergency stop of the shutter curtain, and a first lowering position that is activated before the shutter curtain lands. and a second lowering position detecting means for detecting that the shutter curtain has been extended a predetermined distance after the first lowering position detecting means is activated, and stopping the shutter curtain from lowering. A safety control device for electric shutters characterized by: 2) The safety control device for an electric shutter according to claim 1, wherein the detection signal from the obstacle detection means is configured to be ignored after the first lowering position detection means is activated. .