JPS594503Y2 - Device to prevent equipment from falling when lifting ropes are cut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing equipment, etc. suspended by an elevator from falling due to cutting of the hanging rope.

Fixtures installed in the atrium of ordinary houses, such as lighting fixtures, are usually fixed to the ceiling on the second floor.
Since repair and cleaning are difficult, it is convenient to take down the lighting equipment and dispose of it.

For this reason, a device is used in which a lighting device is attached to one end of a lifting rope and the other end is wound around a winding drum of an elevator.

However, conventional elevators of this type have incomplete measures to prevent the equipment from falling when the lifting rope is cut.

The present invention definitely solves these conventional problems, and one embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing one embodiment of the fall prevention device of the present invention, in which a lighting fixture A is fixed to one end of a lifting rope 1, and the other end is wound around a winding drum 2 of an elevator B. It looks like this.

A worm wheel 3 is integrally attached to the winding drum 2, and a worm gear 5 integrated with a sprocket 4 meshes with the worm wheel 3.

When one side of the annular chain 6 is pulled, the winding drum 2 is rotated via the worm gear 5.

The lifting rope 1 is wound, for example, once, via a winding roller 8 (see FIG. 2) that interlocks with a drum 7 attached to the ceiling.

In the figure, the lifting rope 1 further passes through a guide roller 9, but this guide roller 9 is not particularly necessary.

Further, 10 is a cord reel. The drum 7 and the winding roller 8 are interlocked via a mainspring 11 as shown in FIG. , the other end is fixed to the lighting fixture A via a guide roller 9, and a mainspring 11 always acts in the direction in which the fall prevention rope 12 is wound.

On the other hand, at the end of the drum 7, as shown in FIG. 4, stoppers 13 (three in the figure) are pivotally supported and are designed to be pushed outward by centrifugal force.

Further, a stopper receiver 14 that engages with the protruding stopper 13 is fixed to the ceiling on the outside thereof.

Next, its operation will be explained.

In FIG. 1, when one side of the ring-shaped chain 6 is pulled, the winding drum 2 rotates via the worm gear 5, and the lifting rope 1 wound around the winding drum 2 lifts the weight of the lighting fixture A. It is pulled out and descends.

At this time, even if the chain 6 is pulled quickly, the winding roller 8 rotates slowly because the chain 6 is pulled through the worm, so the stopper 13 does not operate.

On the other hand, when raising the lighting fixture A, pull the opposite side of the chain 6 and it will rise, and when it has reached the top, if you leave it as it is, the worm gear 5 will keep the lighting fixture A in the same state.

If the lifting rope 1 were to break during operation, the lighting fixture A would begin to fall, but this would pull the fall prevention rope 12 (see Figure 2), causing the drum 7 to rapidly rotate. start.

Therefore, the stopper 13 jumps outward due to centrifugal force,
Since the lighting fixture A engages with the stopper receiver 14 and stops rotating, the lighting fixture A will not fall.

Note that the mainspring 11 functions to eliminate slack in the lifting rope 1.

Furthermore, when the device is lowered, there is a risk that the device will rotate, but this can be avoided by fixing the fall prevention rope 12, the lifting rope 1, and the cord of the cord reel 10 in a straight line at intervals. Tension is applied to each rope or cord to prevent rotation, and the lighting fixture remains in a fixed position even when the fixture is pulled up.

As described above in detail, the present invention has the effect of being able to use the device with peace of mind because it has a simple structure and reliably prevents the device from falling.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of the fall prevention device of the present invention, Figure 2 is a sectional view taken along line XX in Figure 1, Figure 3 is an enlarged sectional view of the drum and winding roller, and Figure 4 is the same as in Figure 3. It is a YY cross-sectional view. A...Lighting equipment, B...Elevator, 1.
...Elevating rope, 2 ... Winding drum, 3 ... Worm wheel, 4 ... Sprocket, 5 ... Worm gear 6. ...
...Chain, 7...Drum, 8...
Winding roller, 9...Guide roller, 10.
...cord reel, 11 ... mainspring,
12... Fall prevention rope, 13...
Stopper, 14... Stopper receiver.

Claims (1)

[Scope of utility model registration request] A drum of the same diameter attached to the ceiling and a winding roller are linked via a spring, and a stopper is pivotally supported at the end of the drum so that it pops outward by centrifugal force. fixes the stopper receiver that engages with the protruding stopper; one end of the rope for fall prevention is pre-wound on the drum; the other end is fixed to the device, and is constantly actuated in the winding direction by a mainspring. A device for preventing a device from falling when the lifting rope is cut, characterized in that the lifting rope has one end attached to the winding drum of the elevator and the other end is fixed to the device via the lifting rope.