JPH08480Y2 - Safety device for stepladder work - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for preventing a worker who is working on a stepladder from falling.

[0002]

2. Description of the Related Art When performing various kinds of work on a stepladder, the work is performed at a height of about 1.5 to 2 m, so that measures for preventing a worker's fall accident are not so important. It's a reality.

However, when an operator crashes from the top of a stepladder, the operator is often injured, and if the stepladder collapses as the operator falls, a serious accident is likely to occur.

Therefore, the present invention prevents a fall accident of a worker who works on a stepladder, and even in the unlikely event of a fall, by guiding the worker to a person who is hard to collapse the stepladder, a serious accident is caused. The challenge is to prevent the arrival.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention proposes a supporting cylinder along the upper end of one leg of one of the pair of ladders forming a stepladder. Mount, and insert the lower end of the column into the support cylinder via an elastic body so as to be vertically movable, and allow the projections of the column to loosely fit in the guide grooves provided in the support cylinder. 9 parallel to the axis of the support cylinder and in the circumferential direction of the support cylinder
Formed at different 0 degree positions, the middle of the pillar is bent along one side of the step of the stepladder and toward the other ladder, and the upper end of the pillar is connected to the worker's safety belt. Is provided.

[0006]

When working on the stepladder, the worker connects the safety belt to the connecting means at the upper end of the column. Since the middle of the pillar is bent along one side of the step stand, it does not hinder the work. Even if the posture of the worker is broken, the safety belt of the worker is connected to the support column, so that the movement of the center of gravity above a certain level is prevented.

Further, when the center of gravity of the worker is greatly moved and there is a danger of falling, the elastic body in the support cylinder contracts due to the load applied to the supporting column, and the supporting column descends. As the pillar is lowered, the projection of the pillar is guided by the guide groove and the pillar is rotated 90 degrees. For this reason, the upper end of the column and the connecting means are rotated by 90 degrees so as to be parallel to the ladder, so that the worker is pulled toward the ladder and is suspended while falling to the ladder.

The stepladder easily collapses when a force is applied in a direction parallel to the plane of the ladder, but it is difficult to collapse against a force in the direction perpendicular to the plane of the ladder. Therefore, guiding the ladder to the ladder side as described above It is advantageous in preventing falls.

Further, the worker is prevented from falling on the ground or floor because the impact is alleviated by the elastic body of the support cylinder and the worker is hung on the column.

[0010]

EXAMPLE As shown in FIGS. 1 to 3, a stepladder 1 according to an example.
Is composed of a pair of ladders 2 and 2 ', and step ladders 3 and 3'fixed to the upper ends of the ladders 2 and 2', and both hinges 3 and 3'are hinged as usual. It is flexibly connected by 4.

Each of the ladders 2 and 2'described above is composed of two legs 5 and 5'which are spread to the left and right, and a plurality of horizontal ledges 6 passed between the legs 5 and 5 '.

In the stepladder 1 as described above, the ladder 2,
The force in the direction perpendicular to this (see arrow b in FIG. 3) is greater than the force applied in the direction along the 2 ′ plane (see arrow a in FIG. 3).
It is more difficult to fall when is activated.

A support cylinder 8 is fixed to the outer surface of the upper end of one leg 5 of the one ladder 2 along the length direction thereof.
As shown in FIG. 4, the support tube 8 is held by a fixing member 9 and fixed to the leg 5 via the fixing member 9. The lower end of the support cylinder 8 is closed, and a guide groove 10 is provided at the upper end.

The guide groove 10 includes an upper end groove portion 11 and a lower end groove portion 12 which are parallel to the axis of the support cylinder 8 and both groove portions 11,
And a slanted groove portion 13 that allows 12 to be gently continuous. The groove portion 11 is outside the lower end groove portion 12 (on the climbing surface side of the ladder 2), and both are provided at positions separated by about 90 degrees in the circumferential direction of the support cylinder 8, and the end portion of the upper end groove portion 11 is supported. Tube 8
Open at the top of the.

A coil spring 14 is housed inside the support cylinder 8, and the lower end of the column 15 is inserted on the coil spring 14 so as to be vertically movable. The pillar 1
A protrusion 16 is provided at the lower end of the protrusion 5, and the protrusion 16 is loosely fitted in the guide groove 10. The spring force of the coil spring 14 is set so as to be compressed by a load about the weight of the operator.

The support column 15 extends on the step stand 1 along the direction of the axis of the support cylinder 8, and the bent portion 17 is formed in the middle thereof.
Is provided. The upper half of the bent portion 17 extends along one side of the stepping stands 3, 3 ′ to the other ladder 2 ′ side, and the upper end thereof reaches almost above the hinge 4. As shown in FIG. 5, the height of the pillar 15 from the top of the stepping stands 3 and 3'is about the waist of the worker 18 (about 1 m), and the upper end of the rope 19 is connected to the tip thereof and the rope is A hook 20 is attached to the lower end of 19 and the hook 20 is locked to a safety belt 21 of the worker 18.

The stepping safety device of the embodiment is as described above. When the posture of the worker 18 working on the stepping stands 3 and 3'is collapsed, the rope 19 is tensioned and the load is propped up. 15 and the stepladder 1 prevent the posture from further collapsing.

When the worker 18 falls, the load acts on the coil spring 14 through the rope 19 and the column 15. The column 15 is the coil spring 1
4 is compressed while descending in the support cylinder 8,
The upper half of the pillar 15 rotates by 90 degrees as is moved from the upper end groove portion 10 of the guide groove 10 to the lower end groove portion 12 and turns in the direction along the surface of the ladder 2 of the step pedestals 3 and 3 '(FIG. 1). And FIG. 2).

Therefore, since the rope 19 is also pulled in that direction, the worker 18 connected to the rope 19 via the hook 20 is also pulled in that direction, and the direction of the fall is guided to the ladder 2 side. As a result, the worker 18
3'falls in the direction of the ladder 2 (direction of arrow c in FIG. 3) from above. As described above, this direction is the direction in which the stepladder 1 is less likely to fall down, so even if the worker 18 falls, the stepladder 1
Can be prevented from falling.

Further, the shock caused by the fall of the worker 18 is absorbed by the contraction of the coil spring 14, and the worker 18 is suspended in the air and prevented from falling to the ground or floor.

[0021]

As described above, according to the present invention, the stability of the posture of the worker who works on the stepladder is ensured, and the stepladder is hard to fall even if there is a danger of falling. As well as guiding, the impact on the worker is mitigated, so that there is an effect of preventing a fatal injury due to a fall.

[Brief description of drawings]

FIG. 1 is a partially omitted perspective view of an embodiment.

FIG. 2 is a front view of the above.

FIG. 3 is a plan view of the same as above.

FIG. 4 is a partially enlarged sectional view of the above.

FIG. 5 is a side view of the above.

[Explanation of symbols]

 1 Stepladder 2, 2'Ladder 3, 3'Stepladder 4 Hinge 5, 5'Leg 6 Sideboard 7, 7'Outrigger 8 Support tube 9 Fixing bracket 10 Guide groove 11 Upper end groove 12 Lower end groove 13 Inclined groove 14 Coil spring 15 Prop 16 Protrusion 17 Bend 18 Worker 19 Rope 20 Hook 21 Safety belt

Claims (1)

[Scope of utility model registration request] 1. A support tube is attached to the upper end of one leg of one ladder of a pair of ladders along the leg, and the lower end of the column is supported by an elastic body in the support tube. Part is vertically movably inserted, the projections of the support post are loosely fitted in the guide grooves provided in the support cylinder, and the upper and lower ends of the guide groove are parallel to the axis of the support cylinder and in the circumferential direction of the support cylinder. 90
Formed at different degrees, bend the middle of the pillar along one side of the step of the stepladder and in the direction of the other ladder,
A safety device for stepping up work that has a connecting means to the worker's safety belt at the upper end of the pillar.