JPH10184256A - Safety device of high place working ladder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a risk such as a ladder break during the high place work by using the ladder or a worker misses his footing on the ladder to fall from the ladder to ensure safety and to make it possible to smoothly and efficiently execute work with the movement of the worker smoothly even in the case the worker moves for ascending the ladder. SOLUTION: A rope 10 is provided to main frame levers 1 and 2 of a ladder A so as to parallel to the outside of the main frame levers 1 and 2, the upper and lower ends of the rope 10 are fixed to both up and down sections of the main frame levers 1 and 2 with metal fixtures 3 and 4, at the same time, a sliding metal fixture 8 sliding in oneway so as to make it possible to freely slide in the ascending direction thereof and to prevent the metal fixture from sliding in the descending direction is provided to the rope 10, and an auxiliary rope 11 having a hook 14 capable of being loaded and unloaded to the waist belt (safety belt) is mounted to the slide metal fixture 8. the ladder A is formed in the from of an expansion stair, and hanging hooks 12 are provided to the upper ends of the ladder A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder for working at heights which makes it possible to minimize the risk of a worker stepping off and falling off the ladder while working at heights using the ladder. Related to safety devices.

[0002]

2. Description of the Related Art Conventionally, a lifeline is attached to a worker's waist band as a means for preventing an accident such as a worker falling down accidentally when working at a high place at a construction site or an electric construction site. The ladder method of fixing the other end to an appropriate portion such as a ladder or the like is adopted.

[0003]

However, according to such a conventional method, the tip of the lifeline is detachably fixed to an appropriate part at a high place by itself, and therefore, when moving up and down, it is necessary to move In each case, the mounting position must be changed, and if there is no appropriate mounting position, there is a problem that the system is endangered.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to cause a worker to crash when working at a high place using a ladder. In order to prevent such dangers and ensure safety, when moving up the stairs without sliding the hook, it is possible to move it along with the movement of the worker without changing the hook. It is an object of the present invention to provide a safety device for a ladder for high-place work that is simple, easy to handle, and highly safe, which enables work to be performed efficiently and efficiently.

[0005]

In order to achieve the above object, a safety device for a ladder for aerial work according to the present invention is characterized in that a rope is attached to a main frame rod of the ladder along the outer surface of the main frame rod. The upper end and the lower end of the rope are fixed to the upper and lower portions of the main frame rod by fixing brackets, and the rope is free to slide in the rising direction, but is prevented from sliding in the falling direction. As described above, a slide fitting that slides only to one side is provided, and an auxiliary rope having a hook that can be attached to and detached from a waist band (safety belt) is attached to the slide fitting.

[0006] In the above apparatus, the ladder is formed in multiple stages of expansion and contraction, and a hook for hanging is provided at the upper end of the ladder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a ladder A, a ladder formed in a multistage telescopic manner is used. The ladder shown in FIG. 1 is the simplest one in which two upper and lower ladders are connected so as to expand and contract in two stages.

A rope fixing bracket 3.4 is attached to the upper part of the upper ladder and the lower part of the lower ladder via the bracket 5.6 so that the rope 10 extends along the outer surface of each main frame rod 1.2.

The lower rope fixing bracket 4 is used to fix the rope 10 slidably in accordance with the expansion and contraction of the ladder A. The operation of the handle 7 fixes or releases the rope 10.

A slide fitting 8 with a stopper is provided on a rope 10. The slide fitting 8 is for attaching an auxiliary rope (lifeline) 11, and is slidable in the ascending direction with respect to the rope 10, but is prevented from sliding in the descending direction and fixed immovably at a fixed position. This allows sliding in only one direction. FIG. 3 shows an example of the slide fitting 8 with the stopper.

As shown in FIG. 3, a stopper 8b is provided on the cylindrical main body 8a so as to protrude downward from the inner wall.
When the tip of the stopper 8b bites into the rope 10 in a downwardly inclined manner, the stopper 8b stops in the descending direction but slides freely upward. Stopper 8
b is provided with a set button 8c so that the stopper 8b is manually operated to remove the bite into the rope and can be freely moved.

At the upper end of the ladder A, a hanging hook 12 is provided. The ladder can be set in a stable state by locking the hook 12 to an appropriate portion (for example, a messen wire) 13 at a high working position.

At the free end of the auxiliary rope 11, a hook 14 for attaching to and detaching from the waist band is provided.

[0014]

[Action] The ladder A is extended to a required length and leaned on an appropriate portion of the work section at a high place.
When 2 is hung on the wire 13 as shown in FIG. 1, the ladder A is set in a stable state. Rope 1 with extension of ladder A
Since 0 is stretched, after the stretching is completed, the lower rope fixing bracket 4 is operated to lock the rope 10 with respect to the rope 10,
Secure together. Further, in this state, the slide fitting 8 with the stopper is pulled back to the lowered position, and the auxiliary rope 11 attached thereto is connected to the worker's waist band by the detachable hook 14 at the free end.

When the worker climbs up the ladder A, the auxiliary rope 11 is pulled upward accompanying this, and the slide fitting 8 rises while sliding the rope 10.

In the event that the worker slips on the ladder or falls off the ladder while working on the upper part of the ladder, the worker may pass through the auxiliary rope 11 connected to the waist band of the worker. Since a downward load is applied to the stopper-equipped metal fitting 8, the stopper mechanism is instantaneously activated to fix the slide metal piece 8 to the rope 10 at that position and prevent the slide metal piece 8 from descending. Therefore, the worker is suspended in the air by the auxiliary rope 11, but is prevented from falling.

[0017]

The present invention is constructed as described above, so that when the worker climbs up the ladder or works on the upper part, he or she slips and falls. Even if anything happens, the auxiliary rope tied to the waist belt is fixed to the rope attached to the ladder by the function of the slide bracket with stopper, and the worker falls from the ladder or is injured to prevent descent. Can be prevented and safely protected. Also, the ladder is hung on a messenger wire etc. by the hanging hook at the upper end and the ladder may be broken in the middle to set the ladder in a stable state, or it may be hooked on a car etc. and fall down This also protects the worker safely, has a simple configuration, ensures operation, and can be implemented at a low cost.

[0018]

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of an entire ladder.

FIG. 2 is a front view of a ladder provided with the device of the present invention.

FIG. 3 is a longitudinal sectional view of an essential part showing an example of a slide fitting with a stopper.

[Explanation of symbols]

 1.2 Main frame rod 3.4 Rope fixing bracket 8 Slide bracket with stopper 10 Rope 11 Auxiliary rope 12.14 Hook A Ladder

Claims (2)

[Claims] 1. A rope is attached to a main frame rod of a ladder along an outer surface of the main frame rod, and upper ends and lower ends of the rope are fixed to upper and lower parts of the main frame rod by fixing brackets. The rope is provided with a slide fitting that is slidable in the ascending direction but slides in only one direction so as to prevent sliding in the descending direction. A safety device for a ladder for working at height, comprising an auxiliary rope having a hook capable of attaching and detaching the ladder. 2. The safety device for a ladder for working at heights according to claim 1, wherein the ladder is formed in multiple stages of expansion and contraction, and a hook for hanging is provided at an upper end of the ladder.