JP2502746Y2 - Oversliding door safety device - Google Patents

Description

The present invention relates to a safety device for an oversliding door, for example, an electric low-head type device that opens and closes a relatively large opening in a factory, a warehouse, a hangar, or the like. .

(Prior Art) Conventionally, an electric low-head type over-sliding door has horizontal rail portions extending rearwardly arranged in parallel vertically at the upper ends of the left and right vertical rail portions that guide the sliding door up and down. A structure in which a drum for winding and unwinding the wire for raising and lowering the sliding door is rotatably provided at the rear portion of the left and right horizontal rail portions is adopted.

(Problems to be Solved by the Invention) In the above-mentioned conventional structure, when the sliding door closes the opening, the left and right drums are rotated in the wire rewinding direction and are wound on the left and right drums. The wire is sequentially unwound from the drum, and the sliding door is lowered from the horizontal rail part to the vertical rail part.At this time, the sliding door is smoothly guided by being guided from the left and right horizontal rail parts to the vertical rail part. Even if the situation does not occur, the wire is sequentially rewound from the drum, and therefore, when the tensioned wire is relaxed when descending the sliding door, or when the wire is detached from the drum, the sliding door is not released. There is a risk of a sudden drop and also a risk of a broken wire.

Therefore, the present invention has been made in view of such a problem, and when the sliding door is lowered, the tension state of the wire rewound from the drum is detected, the wire is loosened, the wire is cut, and the wire is cut. Allows the sliding door to automatically lock when the wire is released from tension, such as when the sliding door is removed from the drum, which prevents the risk of the sliding door from dropping suddenly. It is intended to provide a door safety device.

(Means for Solving the Problems) The safety device for an oversliding door of the present invention is
Left and right guide rails having a vertical rail portion and a horizontal rail portion extending rearward from the upper end of the vertical rail portion, and a hinge provided on the left and right guide rails so as to be vertically movable via guide rollers. A sliding door in which a plurality of panels are rotatably connected to each other, and a wire rotatably mounted on the rear portion of the horizontal rail portion of the left and right guide rails and fixed to the lower end portion of the sliding door are attached to the horizontal rail. A drum which winds and unwinds through a portion to raise and lower the sliding door, and a braking mechanism which is provided on at least one horizontal rail portion of the left and right guide rails and brakes the sliding door downwardly. The mechanism has an operating arm that is rotatably provided on the horizontal rail portion and is constantly urged toward the wire. A wire tension detecting roller that engages a tensioned wire that raises and lowers the swing door, and a lock pin that advances into the horizontal rail portion and locks the descending movement of the sliding door when the tension of the wire is released by the wire tension detection roller. Are provided in each.

(Operation) In the oversliding door safety device of the present invention, the sliding door is lifted from the vertical rail portion of the left and right guide rails to the horizontal rail portion by winding the left and right wires on the left and right drums to open the sliding door. The department is opened. Further, when the left and right wires are unwound by the left and right drums, the sliding door is moved down from the horizontal rail portions of the left and right guide rails to the vertical rail portions, and the openings are closed.

At this time, the wire tension detecting roller of the braking mechanism is engaged with the tensioned wire that raises and lowers the sliding door against the biasing force, and the lock pin of the braking mechanism is retracted from the horizontal rail portion. Due to
While the wire tension detecting roller detects the tension of the wire, the sliding door is guided by the left and right guide rails and smoothly moved up and down.

Also, when the sliding door is lowered,
When the sliding door does not descend smoothly and the tension of the wire is released such that the wire is unwound sequentially by the left and right drums and the wire relaxes, the wire tension detection roller of the braking mechanism detects by the urging force. The lock pin moves toward the horizontal rail part by the detection operation of the wire tension detection roller, and the lock pin automatically advances into the horizontal rail part, and the lock pin guides the guide roller at the predetermined position of the sliding door. The descending movement of is locked. Thus, the entire lowering of the sliding door is locked so that it cannot fall.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 denotes left and right guide rails which are arranged and fixed in opposition to the left and right portions of an opening of a factory, a warehouse, a hangar, etc. The left and right guide rails 1 are vertical rail portions 2 extending in the vertical direction.
And a horizontal rail portion 3 extending in parallel from the upper end of the vertical rail portion 2 toward the rear. The left and right vertical rail portions 2 are fixed to the vertical rail fixing frame 4 of the guide rail 1, and the left, right, upper and lower horizontal rail portions 3 are connected to the guide rail 1.
It is fixed to the horizontal rail fixing frame 5.

Further, 6 is a sliding door provided between the vertical rail portion 2 and the horizontal rail portion 3 of the left and right guide rails 1 so as to be able to move up and down. And is vertically connected so as to be rotatable. A guide roller 10 engaged in the vertical rail portion 2 and the horizontal rail portion 3 via a roller shaft 9 is rotatably mounted on each of the left and right hinges 8 on which the respective panels 7 are connected in series. ing.

Further, brackets 11 project from hinges 8 on the lower left and right ends of the sliding door 6, and lower ends of wires 13 are fixed to locking pins 12 on the protruding ends of the left and right brackets 11. The wire 13 is drawn rearward along the rail fixing frame 5 via a guide roller 14 rotatably mounted on the front end of the horizontal rail fixing frame 5 of the left and right guide rails 1. . Also, the left and right wires
The left and right guide rollers 14 on which 13 is suspended are rotatably mounted on roller receivers 15 projecting from the rail fixing frame 5.

Further, 16 is a drum provided at the rear portion of the horizontal rail portion 3 in the left and right guide rails 1, and the left and right drums 16 are fixedly mounted on both left and right end portions of a winding shaft 17,
This winding shaft 17 has brackets 18 fixed on the left and right sides.
It is rotatably mounted on. In addition, between the one bracket 18 and the winding shaft 17, the winding shaft 17
Both ends of the spring 19 wound around are locked. The upper ends of the left and right wires 13 are locked to the left and right drums 16 and wound and unwound on the upper and lower ends.

The sprocket 20 is attached to one side of the winding shaft 17.
Is fixed, and the endless chain 23 is rotatably suspended between the sprocket 20 and the sprocket 22 of the switch 21,
The opening / closing device 21 is arranged and fixed to the rear part of the winding shaft 17.

Further, 24 is a braking mechanism provided in the middle upper part of the horizontal rail fixing frame 5 in the left and right guide rails 1, and the left and right braking mechanisms 24 are provided with spacers 25 in the middle upper part of the rail fixing frame 5. And a bearing body 26 having an inverted U-shape is fixed, and a rotation center shaft 27 in the left-right direction is rotatably mounted on the bearing body 26 and extends in the front-rear direction at the inner end of the rotation center shaft 27. The proximal end of the operating arm 28 is fixed.

A wire tension detecting roller 29 that engages with the wire 13 is rotatably supported by a support shaft 30 inside the tip of the operating arm 28. Further, a lock pin 31 for the guide roller 10 of the sliding door 6 is protruded through an arm 32 at the outer lower portion of the tip end of the operation arm 28. Further, the upper side plate 33 of the horizontal rail portion 3 is formed with an insertion hole 34 through which the lock pin 31 projects forward and backward in the horizontal rail portion 3.

Further, a coil spring 35 is wound around the rotation center shaft 27, and one extension portion 36 of the coil spring 35 is locked by a locking pin 37 of the bearing body 26 and the other extension portion 38 is locked to a locking pin 39 of the rotation center shaft 27. The coil spring 35 constantly urges the actuating arm 28 to rotate downward about the rotation center shaft 27, and the wire tension detecting roller 29 at the tip of the actuating arm 28 with respect to the tensioned wire 13. The wire 13 is always biased to prevent the wire 13 from coming off the drum 16.

 Next, the operation of the above embodiment will be described.

When the opening is closed by the sliding door 6 and the opening 21 is driven, the winding shaft 17 is interlocked with the endless chain 23 and the sprockets 20 and 22, and the left and right are rotated. The drum 16
Is rotated in the direction of winding the wire 13. By the rotation of the left and right drums 16, the respective wires 13 are sequentially wound around the left and right drums 16 through the guide rollers 14, and the left and right wires 13 cause the sliding door 6 to move to the left, right, up and down guide rollers 10. Through the vertical rail portions 2 of the left and right guide rails 1 to the horizontal rail portion 3 in sequence, so that the sliding door 6 is horizontally pulled up between the horizontal rail portions 3 above the left and right guide rails 1 and opens. The part is greatly opened.

Next, in the case of closing the opened opening, when the switch 21 is driven in reverse, the winding shaft 17 is interlocked with the endless chain 23 and the sprockets 20 and 22, and the left and right drums 16 are connected to the wire 13. Is rotated in the rewinding direction. Further, the rotation of the left and right drums 16 causes the respective wires 13 to be sequentially unwound from the left and right drums 16, and the sliding door 6
Are sequentially lowered from the horizontal rail portions 3 of the left and right guide rails 1 via the left and right upper and lower guide rollers 10, and thus the sliding door 6 closes the opening between the left and right guide rails 1. .

At this time, that is, when the opening is opened and the opening is closed, the wire tension detection roller 29 of the braking mechanism 24 attaches the coil spring 35 to the left and right tensioned wires 13 that raise and lower the sliding door 6. Since the lock pins 31 of the braking mechanism 24 are respectively retracted from the insertion holes 34 of the horizontal rail portion 3 while being engaged against the force, the wire tension detection rollers 29 cause the left and right wires 13 to move. While the tension state is detected, the sliding door 6 is guided by the left and right guide rails 1 and smoothly moved up and down.

Next, as described above, when the sliding door 6 descends, the sliding door 6 does not descend smoothly, and the wires 13 are sequentially rewound by the left and right drums 16 and the left and right wires 13 relax. When the tension state of the left and right wires 13 is released, the operating arm 28 having the wire tension detection roller 29 of the braking mechanism 24 descends and rotates about the rotation center shaft 27 by the restoring force of the coil spring 35. The wire tension detection roller 29 performs the detection operation, and the detection operation of the wire tension detection roller 29 causes the operation arm 28 to move.
The lock pin 31 of the
31 is automatically inserted into the insertion hole 34 of the horizontal rail portion 3 and is projected and moved into the horizontal rail portion 3, and the lock pin 31 causes the guide roller 10 at a predetermined position of the sliding door 6 to move.
The descending movement of is locked.

Further, even when the wire 13 is cut midway, the downward movement of the guide roller 10 is automatically locked by the operation of the lock pin 31. Therefore, the entire lowering of the sliding door 6 is locked so that it cannot fall.

In the above-described embodiment, the case where the braking mechanism 24 is provided on the left and right horizontal rail portions 3 has been described, but the present invention is not limited to this, and it may be provided on one horizontal rail portion 3. In addition, in carrying out, when the wire 13 is loosened and the wire 13
If the brake is disconnected, the braking mechanism 24 automatically operates to lock the sliding door 6 from descending as described above, while the operation of the braking mechanism 24 is detected to open and close the switchgear.
It is preferable to stop the operation of 21 and stop the rewinding of each wire 13 by the left and right drums 16.

According to the present invention, at least one horizontal rail portion of the guide rail is provided with a braking mechanism capable of locking the descending movement of the sliding door, and the braking mechanism is constantly urged toward the wire for raising and lowering the sliding door. Inside the horizontal rail portion when the tension of the wire is released by the wire tension detection roller that engages with the tensioned wire that raises and lowers the sliding door by the operation arm Since a lock pin that can move forward and backward to lock the descending of the sliding door is provided respectively, when descending the sliding door, when the wire rewound from the drum is loosened or the wire is cut, etc. When the tension is released, the braking mechanism automatically operates and the sliding door The descent can be automatically locked, and the risk of the sliding door dropping suddenly can be prevented.

Further, since the wire tension detecting roller and the lock pin of the braking mechanism are provided at the tip of the actuating arm respectively, the wire tension detecting roller and the lock pin can be operated at the same time surely, and a simple structure ensures sufficient safety. be able to. Further, when the wire for raising and lowering the sliding door is tensioned again, the wire tension detecting roller can automatically unlock the sliding door by the lock pin. Therefore, a highly safe oversliding door can be provided.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view in which a part of an oversliding door equipped with a safety device is omitted, and FIG. 2 is a sectional view of the safety device taken along line a-a of the same as above. ,
FIG. 3 is a side view of the same safety device, and FIG. 4 is FIG.
It is sectional drawing of a line part. 1 ... Guide rail, 2 ... Vertical rail part, 3 ... Horizontal rail part, 6 ... Sliding door, 7 ... Panel, 8 ... Hinge, 10 ... Guide roller, 13 ... Wire, 16 ... Drum, 24 ...
Braking mechanism, 28 ... Working arm, 29 ... Wire tension detecting roller, 31 ... Lock pin, 35 ... Coil spring.

Claims (1)

(57) [Scope of utility model registration request] 1. Left and right guide rails having a vertical rail portion and a horizontal rail portion extending rearward from an upper end portion of the vertical rail portion, and vertically movable via the guide rollers to the left and right guide rails. A sliding door provided with a plurality of panels rotatably connected by hinges, and rotatably mounted on the rear portion of the horizontal rail portion of the left and right guide rails and fixed to the lower end portion of the sliding door. A drum that winds and unwinds a wire through the horizontal rail portion to raise and lower the sliding door, and a braking mechanism that is provided on at least one horizontal rail portion of the left and right guide rails and brakes the sliding door downward. The braking mechanism includes an operating arm rotatably provided on the horizontal rail portion and constantly urged toward the wire. A wire tension detecting roller that engages with a tensioned wire that raises and lowers the sliding door, and a lock pin that advances into the horizontal rail portion and locks the descending movement of the sliding door when the tension of the wire is released by the wire tension detecting roller. A safety device for an over-sliding door, which is provided on each of the operating arms.