JPH0627750Y2 - Drive stop device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a drive stop device for an electric shutter, and more specifically, stops the opening / closing drive by detecting the upper limit position of the shutter that rises and the slack of the connecting chain. The present invention relates to a drive stopping measure for the electric shutter.

[Conventional technology]

Generally, in a shutter device in which a shutter suspended through a connecting chain is moved up and down by vertical movement of the connecting chain, a detection switch is provided to prevent the shutter from overrunning from an appropriate operating range. Things are known. However, the conventional detection switch has only a shutter overrun prevention function, and it is necessary to provide a separate detection switch to detect slack of the chain, etc., which complicates the device and makes the mounting operation difficult. Therefore, there is a problem that the cost of the entire shutter device becomes high.

[Problems to be solved by the invention]

The present invention has been made in view of the above situation based on a completely new idea, and its purpose is to raise the upper limit position of the shutter and the slack of the connecting chain by a single open / close drive stop switch. It is intended to provide a drive stopping measure for an electric shutter which is configured to detect the above-mentioned condition and stop the opening / closing drive.

[Means for solving problems]

The technical means adopted by the present invention to achieve the above object are
A flexible sheet material is stretched between supporting rods arranged in parallel in the vertical direction at a predetermined interval to form a shutter curtain, and the shutter curtain is sequentially moved up and down from the lowermost supporting rod to open and close. In the folding seat shutter configured as described above, an opening / closing drive stop switch, which is always held in a non-operating state, is provided on the rocking base end side in the lifting path of the shutter curtain, and the rocking tip end side is connected to the chain side. A switch bar that is always urged and urged is provided on the switch bar, and when the uppermost support rod comes into contact with the switch bar at the upper limit position when the shutter curtain rises, the switch bar that swings away from the chain stops the switch. Is operated to cut off the power, and when the chain is loosened, the stop bar is operated by the switch bar that swings to the chain side to cut off the power. It is intended.

[Action]

When the shutter rises and reaches the upper limit position, the uppermost support rod contacts the switch bar and swings the switch bar away from the chain, and the swinging switch bar activates the stop switch for opening / closing drive. Power is turned off to stop the shutter from rising. When the connected chain that holds the shutter loosens, the switch bar swings to the chain side, and the swinging switch bar operates the stop switch for opening / closing drive to cut off the power.

〔Example〕

The present invention will be described in detail based on an embodiment shown in the drawings. 1 is a shutter that opens and closes the opening of the building,
The shutter 1 includes a flexible shutter curtain 2 and a plurality of support rods 3, 3. ． ． It is stretched between them. Reference numeral 4 denotes a case horizontally extending above the opening. A drive shaft 6 which is rotationally driven by an opening / closing device 5 is horizontally supported in the case 4, and a sprocket 7 is attached to the drive shaft 6. It is fixed. A suspending portion 9 connected to the lower end of the shutter 1 is provided at one end of the connecting chain 8 suspended from the sprocket 7 and is suspended below the connecting chain 8, and a counterweight 1 is provided at the other end of the connecting chain 8.
0 is installed. When the lifting portion 9 side of the connecting chain 8 moves upward due to the rotation of the drive shaft 6, the connecting chain 8
The shutter 1 suspended by the
While being guided by the guide rails 11, the foldable shutter 1 rises in sequence from the lower end side, and when the lifting portion 9 side moves downward, the foldable shutter 1 hangs down to descend the opening of the building. It is designed to open and close.

The switch bar 1 is provided on the ascending / descending path of the shutter curtain 2.
An oscillating switch 4 is pivotally supported via a support shaft 15. The oscillating base end side of the switch bar 14 is connected to the switch 5 and is a stop switch for opening / closing drive which is always held in a non-operating state. 13 are installed side by side. A switch roller 16 is rotatably supported on the swinging tip side of the switch bar 14,
The switch roller 16 projects into the ascending / descending path of the shutter 1. The switch bar 14 is elastically biased toward the connecting chain 8 by a spring 17 wound around a support shaft 15, and the switch roller 16 is normally in contact with the connecting chain 8 (third part). (B)).

An arcuate pressing body 18 for actuating the stop switch 13 for opening / closing drive is formed at the base end portion of the switch bar 14, and the pressing body 18 responds to the swing of the switch bar 14 to stop the opening / closing drive. 13 is pressed to operate. When the shutter 1 rises and reaches the upper limit position, as shown in FIG. 3 (A), the uppermost support rod 3 contacts the switch roller 16 and the switch bar 14 resists the bias of the spring 17. The shutter is oscillated in a direction away from the connecting chain 8 (direction of arrow A), and one end of the pressing body 18 formed in an arc shape operates the stop switch 13 for opening / closing drive to cut off the power of the opening / closing machine 5, and the shutter The rise of 1 is stopped.

When the connecting chain 8 that holds the shutter 1 loosens,
The switch bar 14 swings toward the chain 8 (in the direction of arrow B) by the biasing force of the spring 17, and the other end of the pressing body 18 operates the stop switch 13 for opening / closing drive to cut off the power of the switch 5. It is like this.

In the structure as described above, when the connecting chain 8 is moved up and down by the rotation of the drive shaft 6, the shutter curtain 2 is folded up and down to smoothly open and close the opening of the building. When the uppermost support rod 3 of the shutter 1 that has reached the upper limit position in the folded shape when the opening is opened comes into contact with the switch roller 16, the switch bar 14 swings in the direction away from the chain 8. Then, one end of the pressing body 18 actuates the stop switch 13 for opening and closing the drive to turn off the power of the opening and closing device 5 to stop the rise of the shutter 1. Further, when closing the opening, when the lower end of the shutter 1 that descends reaches the floor surface and the connecting chain 8 that suspends the shutter 1 loosens, the switch bar 14 swings by the bias of the spring 17, The other end of the pressing body 18 operates the stop switch 13 for opening and closing the drive to cut off the power of the opening and closing machine 5 to stop the lowering of the shutter 1. In addition, shutter 1
If the connecting chain 8 is cut during the ascending / descending of, the connecting chain 8 loosens greatly, so that the urged and supported switch bar 14 swings in the direction of arrow B, and the pressing body 18 is opened and closed. By operating the stop switch 13, the power to the switch 5 is cut off, and the driving of the shutter 1 is stopped.

[Effect of device]

In the present invention, a flexible sheet material is stretched between supporting rods arranged in parallel in the vertical direction at a predetermined interval to form a shutter curtain, and the shutter curtain is sequentially moved up and down from the lowermost supporting rod. In a folding sheet shutter configured to be moved and opened / closed, an opening / closing drive stop switch, which is always held in a non-operating state, is provided side by side on the rocking base end side of the rocking path of the shutter curtain. A switch bar is provided on the connecting chain side that constantly biases the switch, and when the shutter curtain rises, when the uppermost support rod contacts the switch bar at the upper limit position, the switch swings away from the chain. Power is cut off by differentially operating the stop switch with a bar, and when the chain is loose, the switch bar that swings to the chain side activates the stop switch to cut off power. Therefore, the switch bar not only activates the opening / closing drive stop switch by contacting the rising shutter at the upper limit position and swinging it, but also swinging even when the connecting chain that holds the shutter loosens. Since the opening / closing drive stop switch is operated, it is possible to stop the driving of the shutter by detecting the upper limit of the shutter and the slack of the chain, even though the single opening / closing drive stop switch is provided.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a schematic front view of a shutter having a drive stopping device according to the present invention.
2 is a perspective view of a main part, FIGS. 3 (A) and 3 (B) are explanatory views of the operation of the present invention, FIG. 4 is a side view of a switch bar, and FIG. 5 is an enlarged view of an opening / closing drive stop switch. . 1 ... Shutter, 2 ... Shutter curtain, 3 ...
Support rod, 5 ... Switch, 8 ... Connecting chain, 13 ... Open / close drive stop switch, 14 ... Switch bar

Claims (1)

[Scope of utility model registration request] 1. A shutter curtain is formed by stretching a flexible sheet material between support rods arranged in parallel in the vertical direction at a predetermined interval, and the shutter curtains are sequentially arranged from the lowermost support rod. In a folding sheet shutter configured to move up and down to open and close, a stop switch for opening and closing drive, which is always held in a non-operating state, is provided on the rocking base end side in the lifting path of the shutter curtain, and the rocking front end. The switch bar is provided with the side always connected to the chain side.
When the uppermost support rod comes into contact with the switch bar at the upper limit position when the shutter curtain rises, the switch bar that swings away from the chain actuates the stop switch to turn off the power, and when the chain is loose, A drive stop device for an electric shutter, wherein a stop switch is operated by a switch bar swinging to a chain side to cut off power.