JPH0242873Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for preventing the fall of a shutter curtain in a shutter installed in an opening of a building or the like.

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

Generally, some building shutters have a shutter curtain suspended by a wire rope or the like, and are opened and closed by winding the wire rope. However, in the past, there were no known effective measures to prevent the shutter curtain from falling when the wire rope was cut, and therefore, when the wire rope was cut, the shutter curtain would either fall to one side or fall straight down. This is extremely dangerous, and there has been a desire for a device to prevent shutter curtains from falling that is effective in terms of safety.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a device for preventing the fall of a shutter curtain in a shutter that can eliminate these drawbacks. In a shutter comprising a shutter curtain suspended by a tension wire rope, the shutter curtain is provided with a drop prevention arm that is constantly biased in a direction to engage with a locking portion on a guide rail side, The fall prevention arm is held by a tensioned wire rope in order to maintain it in the release position where the engagement with the locking part is released, and the fall prevention arm is engaged by the release of the tension caused by cutting the wire rope. The shutter curtain is characterized in that it is configured to engage with the stop portion to prevent the shutter curtain from falling.

With this configuration, the present invention makes it possible to immediately prevent the shutter curtain from falling in response to the cutting of the wire rope.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes an overhead type shutter, and a shutter curtain 2 constituting the shutter 1 is formed by connecting a plurality of slats 3 vertically with hinges 4 so as to form a flush surface. Of the hinges 4, reference numeral 5 denotes a hinge that also serves as a roller bracket provided at the end of the slat 3. A roller 6 is rotatably supported on the hinge 5, that is, the roller bracket 5. A roller 6 is adapted to roll within a guide rail 7. On the other hand, bottom roller brackets 9 on which the lowermost roller 6 is rotatably supported are provided at both ends of the lowermost slat 8 of the shutter curtain 2. A locking pin 11 is fixed, and a ring portion 10a formed at the lower end of the wire rope 10 is inserted and locked into the locking pin 11. This wire rope 10 is stretched along the guide rail 7 and wound around a winding drum 13 above.
Furthermore, the wire rope 10 is always kept under tension due to the stored force of the coil bullet machine 12 provided on the support shaft 13a of the winding drum 13.
It is biased in the direction in which it is wound up. When the shutter curtain 2 is pulled downward against the stored force of the coil bomb 12, the shutter curtain 2 adds its own weight to the pulling force and descends, closing the opening. , the opening is closed in this way, etc., as usual.

Further, between the support 9a for the roller shaft 6a provided on the bottom roller bracket 9 and the roller 6, a fall prevention arm is provided with the base end rotatably supported on the roller shaft 6a. 14 are arranged. This fall prevention arm 14 is a twisting bullet machine 15.
By receiving the accumulated force of energized. Furthermore, the fall prevention arm 14 is formed with an insertion portion 14b through which the wire rope 10 is inserted. As described above, when the wire rope 10 is under tension, the claw portion 14a of the fall prevention arm 14 comes out of the locking hole 7a against the accumulating force of the twister 15, and the fall prevention arm 14 14 is disengaged from the locking hole 7a, but when the wire rope 10 is cut and the tension is lost, the fall prevention arm 14 releases the accumulated force of the torsion bomb 15. The claw portion 14a is fitted into the locking hole 7a to prevent the shutter curtain 2 from falling. In addition, in the figure, 16 is a washer.

In the embodiment of the present invention constructed as described above, opening and closing of the opening is performed by vertically moving the shutter curtain 2 as described above.
In this state, the fall prevention arm 14 is located in the release position by the wire rope 10 which is in a tensioned state, and the shutter curtain 2 can be moved up and down without any hindrance. However, when the wire rope 10 is cut and its tension is lost, the fall prevention arm 14 immediately swings under the accumulated force of the torsion machine 15, and its claw portion 14a engages with the locking hole 7a of the guide rail 7. Fit and engage. Therefore, the lowermost slat 8 is fixed at this position, and the lowering of the shutter curtain 2 is stopped.

In this way, in the present invention, the wire rope 10
Even if the shutter curtain 2 is cut, it can reliably prevent the shutter curtain 2 from falling.
Furthermore, the fall prevention arm 14
Shutter curtain 2 is always under the tension of 0.
The wire rope 10 is positioned at a release position that does not interfere with the vertical movement of the wire rope 10, and in response to the release of the tension caused by the cutting of the wire rope 10, the above-described fall prevention operation is immediately performed. Therefore, the means for detecting that the wire rope 10 has been cut is directly based on the presence or absence of tension in the wire rope 10 itself, and a dedicated detection means is not required. There is no problem at all, and the structure can be extremely simplified.

[Effect]

In summary, since the present invention is constructed as described above, when the wire rope suspending the shutter curtain breaks and the tension is released, the tension will cause the shutter curtain to return to the release position. The positioned fall prevention arm immediately engages with the locking portion on the guide rail side to prevent the shutter curtain from falling, resulting in extremely high safety. Moreover, in this case, the fall prevention arm is directly displaced from the release position to the engagement position in response to the release of tension in the wire rope, so a dedicated mechanism for detecting wire rope breakage is not required at all. Therefore, it is possible to greatly simplify the structure of the shutter curtain fall prevention device, which is extremely safe.

[Brief explanation of the drawing]

The drawings show an embodiment of the fall prevention device for a shutter curtain in a shutter according to the present invention, in which Fig. 1 is a schematic perspective view of the shutter, Fig. 2 is an exploded perspective view of the main parts, and Fig. 3 is an exploded perspective view of the main parts. The figure is an explanatory diagram of the action. In the figure, 1 is the shutter, 2 is the shutter curtain, 3 is the slat, 4 is the hinge, 5 is the roller bracket, 6 is the roller, 7 is the guide rail, 7a is the locking hole, 8 is the bottom slat, 9 is the A bottom roller bracket, 10 is a wire rope, 11 is a locking pin, 14 is a fall prevention arm, and 15 is a torsion machine.

Claims (1)

[Scope of utility model registration request] In a shutter in which a shutter curtain that is guided up and down by a guide rail is suspended by a tension wire rope, the shutter curtain has the following features:
A fall prevention arm is provided that is always biased in the direction of engagement with the locking portion on the guide rail side, and a tension-like arm is provided to maintain the fall prevention arm in the release position where it is disengaged from the locking portion. A shutter curtain characterized in that the shutter curtain is held by a wire rope, and the fall prevention arm engages with a locking part when the tension force generated when the wire rope is cut is released, thereby preventing the shutter curtain from falling. Shutter curtain fall prevention device.