KR20120089535A - Adjustable height of the ladder legs - Google Patents

Abstract

PURPOSE: A height adjuster for a ladder support is provided to safely install a ladder on the ground regardless of the ground conditions by adjusting the heights of ladder supports. CONSTITUTION: A height adjuster for a ladder support comprises a ratchet(3), a fixture latch(4), a lever, and a spring. The ratchet is attached to each ladder support(1) of a ladder and independently adjusts the height of the ladder support. The fixture latch fixes the ratchet to the ladder support. The lever controls the fixture latch. The spring applies restriction force to the fixture latch.

Description

Ladder Support Height Adjuster {Adjustable height of the ladder legs}

The present invention relates to a ladder support height adjuster that allows safe operation by installing the ladder footrest to always maintain a horizontal state by easily adjusting the height of the ladder support even on uneven floors or stairs when using the ladder.

In general, a ladder refers to a mechanism in which a horizontal footrest is installed at regular intervals between two long vertical supports to be able to step up and down from the ground.

These ladders are often used when the ladder footrest is not horizontal because of unevenness due to uneven flooring or unobstructed obstacles when used in the field. There was a problem such as a safety accident.

The present invention is to solve such a conventional drawback, the object of the present invention is to adjust the height of each ladder support so that the ladder footrest is horizontal when using the ladder in a bumpy floor or stairs, any ground situation Even in the safe installation of ladders to provide a way to secure safety work.

In order to achieve the above object, the present invention provides a height adjuster to each ladder support so that the height of each ladder support can be adjusted independently according to the height difference of the floor surface when the ladder is used in uneven places or stairs. By attaching and adjusting, the ladder footrest is installed to be always horizontal regardless of the floor condition, thus ensuring safe working conditions.

The present invention as described above can be used not only in a flat flat ladder, but also in bumpy or staircase, each ladder support independently by adjusting the height of the ladder foot support is always kept horizontal to use the ladder safely Securing safety improves work efficiency and greatly reduces the risk of ladder safety accidents.

1 is a perspective view of the type I ladder of the present invention.
2 is a perspective view of a ladder A of the present invention.
3 is a perspective view with a mechanical height adjuster of the present invention.
4 is a detailed view of the mechanical height adjuster of the present invention.
5 is a perspective view with a hydraulic height adjuster of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a type I ladder of the present invention is composed of a plurality of foot support (2) between the left and right two ladder support and the support (1). Figure 2 is a type A ladder of the present invention is composed of a plurality of foot support (2) between the four ladder support (1) and the support (1). 3 consists of a ratchet 3 and a clasp 4 attached to each ladder support 1 as a mechanical height adjuster of the present invention. Figure 4 is a hydraulic height adjuster of the present invention is composed of a hydraulic cylinder and a regulator attached to each ladder support (1).

The operation of the present invention configured as described above will be described.

In general, ladders designed to be able to climb and climb high above the ground do not have a flat floor when used in the field, so the ladder supports (1) are unstable and unstable due to bumpy or various obstacles, and the footrests (2) are horizontal. There are many times when it is used in the inclined state, but in this case, there is a problem that a safety accident occurs such as a ladder overturning or a worker falling. In order to improve this, the utility model 989-0003208 (1989.5.17) was devised to firmly install the ladder on the inclined floor. However, this also works when the floor is an inclined surface, but is not suitable for use on bumpy or staircases. Therefore, in the present invention, by applying a mechanical structure to each support (1) of the ladder to add the ratchet (3) and the latch (4) or by adding a hydraulic cylinder (5) as a hydraulic device, each ladder support (1) height independently By allowing to adjust the height of the support (1) to ensure that the footrest (2) of the ladder is kept horizontal in any floor condition. The ladder support (1) height adjuster is compatible with both fixed ladders, height adjustable ladders, angle adjustable ladders, and can be fixed firmly in any floor conditions, there is an effect to reduce safety accidents.

1. Ladder support 2. Ladder footrest
3. Ratchet 4. Clasp
5. Hydraulic cylinder 6. Hydraulic cylinder regulator
7. Lever 8. Spring

Claims (2)

A ratchet (3) for independently enabling height adjustment to each ladder support (1) of the ladder, a fixture latch (4) for securing the ratchet (3) and a lever (7) for actuating or releasing the latch (4) And a spring (8) for restraining the clasp (4) and attached to each ladder support (1), the mechanical height adjuster of the ladder support (1) Ladder supports (1) characterized in that the height adjustment of each ladder support (1) of the ladder is independently attached to each support (1) of the ladder by providing a double-acting hydraulic cylinder (5) and a regulator (6). Hydraulic height adjuster

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