JPS6017516Y2 - Seat shutter lift belt cut detection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt cut detection device used in a sheet shutter, and more specifically, the invention relates to a belt cut detection device used in a sheet shutter, and more specifically, a winding shaft installed in a case above the sheet shutter, a bottom aggregate of aggregate arranged in the sheet shutter, This device detects when the belt that connects the rollers breaks when the shutter is raised or lowered. Especially when the balance with the belt tension is lost, the movable frame that supports the roller moves around the pivot and activates the opposing limit switch. It was designed to do so.

In other words, a movable frame is pivotally supported on a fixed frame, and is movable around the axis.This movable frame is further equipped with a detection roller, and this roller is applied to a tensioned belt to balance mechanisms such as weights and springs. When the belt breaks, the weights, springs, etc. become unbalanced and rotate the movable frame, which activates a limit switch facing the movable frame to stop the drive of the opening/closing machine that winds the belt. It is.

Embodiments of the belt cut detection device according to the present invention will be described in detail below with reference to the accompanying drawings.

1 is a winding shaft, and on this winding shaft 1, the lowest aggregate 3 of the sheet shutter 2, which is attached to the upper part of the entrance and exit, is suspended.
The upper end of the belt 4 is attached to the upper end of the belt 4, and the sheet shutter 2 is raised and lowered by driving an opening/closing machine 5 connected to the winding shaft 1.

The aggregates 3 are arranged on the sheet shutters at a constant pitch, and the aggregates 3 are sequentially pulled up from the lowest aggregate 3 and stacked on top of each other, folding the sheet shutters 2 to open the entrance and exit, and starting from the upper aggregate 3. The seat is stretched and lowered to close the entrance/exit.

When the belt 4 is stretched, it is guided by a drum-shaped guide roller 7 that is pivotally supported on a fixed frame 6.

A movable frame 9, which supports a detection roller 8, is supported on the shaft 7' of the guide roller 7, which is a fixed frame, so that the movable frame 9 can move around the shaft 7'.

Further, a weight 10 is attached to the movable frame 9 on the opposite side of the detection roller 8, or a tension spring 11 is provided, and the detection roller 8 is applied to the tensioned belt 4 for balance.

In addition, an L-shaped actuating piece 12 is attached to the side plate of the movable frame 9.
Further, a limit switch 13 attached to the fixed frame 6 is provided at a position opposite to the rotation locus of the actuating part 12, so that when the movable frame 9 loses its balance and rotates, the actuating piece 12 operates the limit switch 13. It has become.

The limit switch 13 communicates with the switch 5.

The present invention has the above-mentioned configuration, and the bevel leaf 4 is attached to the winding shaft 1.
is guided and tensioned by a guide roller 7, and furthermore, a detection roller 8, which is pivoted on a movable frame 9, is placed on the belt 4 so as to be pressed against the belt 4 by a weight 10 or a tension spring 11. Spring 1
1, and the belt 4 is wound around and unwound around the winding shaft 1 by driving the opening/closing machine 5.

If the belt 4 is cut during winding or unwinding of the belt 4, the detection roller 8 of the movable frame 9, which was balanced by the weight 10 or spring 11 in contact with the belt 4, will lose its balance and the weight or spring 11 will become unbalanced. The actuating part 12 provided on the movable frame 9 rotates around the axis 7' due to the action.
The operator operates the limit switch 13 to stop the opening/closing machine, and the brake is applied so that the sheet shutter remains in the same position.

That is, the winding shaft 1 is
At the same time, a sensing roller 8 of a movable frame 9 pivotally supported on a fixed frame 6 is placed on the belt 4 stretched between the guide roller 7 and the winding shaft 1 by a biasing means such as a weight. Therefore, when the belt 4 is cut, the movable frame 9 is strongly rotated by a biasing means such as a weight, and the actuating part 12 provided on the movable frame side
Since the opposite limit switch 13 is actuated, accurate detection is possible.

Further, since the guide roller 7 is pivotally supported by the fixed frame 6, the position of the belt 4 that moves up and down always follows a constant trajectory, so a small space is required, and the operation of the suspended sheet shutter is stable.

Furthermore, if the belt breaks, an unreasonable load will be applied to the adjacent belt and there is a risk that the belt will break, so moving the take-up shaft is a problem, so the opening/closing machine is stopped by the operation of the limit switch and the brake is turned off. The sheet shutter stops at that position, which has the effect of preventing danger.

[Brief explanation of the drawing]

The drawings show an embodiment of the sheet shutter lifting/lowering belt cut detection device according to the present invention, and FIG. 1 is a front view of the sheet shutter, and FIG. 2 is an enlarged side view of the cut detection device taken along the line X-X in FIG. 1. , FIG. 3 is a perspective view of the cutting detection device, and FIG. 4 is a side view of the cutting detection device of another embodiment. 1 ~ Winding shaft, 2 ~ Shitoshitsuta 13 ~ Aggregate, 4 ~
Belt, 5 - opening/closing device, 6 - fixed frame, 7 - guide roller, 7' - shaft, 8 - detection roller, 9 - movable frame, 1
0-weight, 11-tension spring, 12-actuating part,
13 ~ Limit switch.

Claims (1)

[Scope of utility model registration request] The upper end of the sheet shutter, which is made up of a wide sheet with aggregate arranged at a constant pitch, is suspended above the entrance, and the lowest aggregate of the sheet shutter is attached to a winding installed in the case above the entrance. In a seat shutter in which the other end of an elevating belt whose end is attached to a take-up shaft is tied, and the seat shutter can be opened and closed via the elevating belt by driving an opening/closing machine connected to the take-up shaft, A fixed frame is fixed to the upper part of the hanging part of the sheet shutter, and this fixed frame includes a guide roller that guides the lifting belt and a detection roller that contacts the lifting belt on the opposite side of the guide roller. Each movable frame is rotatably supported, and the movable frame is further biased to rotate the movable frame toward a limit switch connected to the switch and provided on the fixed frame. A biasing means such as a weight is provided, and the movable frame is forcibly rotated toward the limit switch by receiving the biasing force of the biasing means by cutting the lifting belt, and the actuating part provided on the movable frame comes into contact with the limit switch. A sheet shutter lifting/lowering belt cut detection device, characterized in that it is configured to stop driving an opening/closing machine.