KR20240001117U - A ladder composed of one climbing stairs and two legs - Google Patents

Abstract

The present invention relates to a mobile ladder. In order to solve the problem of the conventional mobile ladder easily losing its balance and falling over when a lateral force acts on the ladder, a ladder is created by connecting one ascending platform and two support legs to form an equilateral triangular pyramid. By maintaining an equilateral triangle at each support point on the floor, it maintains a stable state against forces in any direction, up, down, or side, acting on the ladder, which has the effect of reducing the risk of the ladder tipping over.

Description

A ladder connected in the form of a triangular pyramid with one ascending platform and two support legs {A LADDER COMPOSED OF ONE CLIMBING STAIRS AND TWO LEGS}

The present invention relates to a mobile ladder, and more specifically, connects one climbing pole and two support legs in the shape of a triangular pyramid so that the three parts of the ladder that touch the ground form the shape of an equilateral triangle, thereby reducing the vertical force applied to the ladder during work. This relates to a ladder that can be stably maintained against loads and horizontal loads.

A ladder is a tool used to climb up and down high or low places, and is also often used for work at high places. For this purpose, many types of ladders have been designed, and the A-type ladder is the most widely used mobile ladder. However, these conventional ladders are very vulnerable to lateral forces acting from the sides and easily tip over, resulting in frequent safety accidents. Accordingly, the Ministry of Employment and Labor and the Korea Occupational Safety and Health Agency completely banned the use of portable ladders for work purposes as of January 1, 2019, but since then, fall prevention devices have been installed only on Type A ladders (including landscaping) with a maximum length of 3.5 meters or less, which has been eased to allow for work. Work has been prohibited on ladders (straight type), telescopic ladders (extendable type), and straight ladders with footrests (type A).

The present invention is intended to solve the problems of the prior art described above. As shown in Figure 1, the horizontal projection surface connecting the surface in contact with the ground of a conventional A-type ladder or landscaping ladder has a rectangular shape with one side very long or two sides. It is in the form of an isosceles triangle that is very long and one side is very short. In order to solve the problem of easily tipping over when lateral force is applied due to the small support force on the side, one ascending platform and two support legs are connected in the form of an equilateral triangular pyramid, allowing the ladder to be used on the ladder. The purpose is to reduce the risk of falling by remaining stable against force in any direction, including front, rear, and side during work.

Another purpose of the present invention is to reduce the weight of the mobile ladder by avoiding additional safety auxiliary devices to ensure some degree of safety in the conventional technology.

The ladder of the present invention for achieving the above-mentioned purpose consists of one ladder climber and two support legs that can be rotated to fold or unfold at the apex of an equilateral triangular pyramid, so that the worker can unfold it in the same form as a tripod. You can maintain a stable shape even when climbing up and down a climbing platform or working on a climbing platform. In addition, it is characterized by convenient movement and storage of the ladder by inserting a tube into the central connecting rod connected to the upper end of the climbing stand and connecting a support leg there so that the ladder can be folded during storage and movement and unfolded during work.

In addition, the ladder is characterized in that it can be maintained within a certain angle when unfolded by connecting a wire rope connecting one end of the climbing ladder and one support leg.

In addition, by installing a fixture that connects the middle part of the two support legs when the ladder is unfolded, the two support legs can be fixed to remain within a certain angle. Also, by attaching about three fixing rings, the ladder can be adjusted to fit the situation of the working position. It is characterized by allowing selection of length.

According to this design, when using a mobile ladder, strong support can be obtained against external forces on the front, rear, and sides, which has the effect of reducing safety accidents caused by falls.

Drawing 1 shows an existing mobile ladder (type A ladder, landscaping ladder).
Figure 2 is a diagram showing the entire configuration of the ladder connecting one ascending platform and two support legs in the shape of a triangular pyramid.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to Figure 2.

The ladder according to the present invention connects one ascending platform and two support legs in the form of a triangular pyramid, and connects them to an ascending stage (10) and two support legs (20) having an 11-shaped shape, as shown in Figure 2. A fixture ( 50) is included.

The ladder according to the present invention, which connects one climbing stand and two support legs in the form of a triangular pyramid, maintains the same state as shown in Figure 2 when used, and when moving or storing, the fixing bar 50 is released and the two support legs ( 20) is configured to be folded toward the ascending stand (10).

In addition, during installation, one of the three fixing rings (21) can be selected and fastened so that the length of the fixing bar can be appropriately adjusted according to the floor topography and space where the support leg (20) is installed.

The above is an exemplary description of preferred embodiments of the present invention, and the scope of the present invention is not limited to the specific embodiments described above. Those skilled in the art will understand that various changes and modifications can be made without departing from the scope of the technical idea of the present invention.

10. Ladder climber
20. Support legs (2)
21. Fixing hook (3)
22. Feet
30. Central connecting rod
31. Rotating ring
40. Wire rope
50. Fixture

Claims (4)

In a ladder consisting of one climbing pole that a worker can climb up and down, a triangular central connecting rod connected to one end of the ascending rod, and two support legs that can each rotate on the remaining two sides of the central connecting rod. ,

It is configured to spread one ascending pole and two support legs in the shape of a triangular pyramid with the central connecting rod as the central axis,

Each of the support legs and the climbing pole is connected with a wire rope so that the ladder can be maintained within a certain angle when unfolded,

When the ladder is unfolded, a fixture connecting the middle portions of the two support legs is installed so that the two support legs can be maintained within a certain angle.

A ladder characterized in that it maintains a triangular pyramid shape when the ladder is unfolded and erected.

The ladder according to claim 1, wherein the ascending pole and the two support legs are connected around a central connecting rod and the support legs are allowed to rotate. The ladder according to claim 1, wherein a wire rope is coupled between the ascending platform and the supporting legs so that the ascending stage and the supporting legs can be maintained within a certain angle. The ladder according to claim 1, wherein the two support legs are connected to a fixing bar so that the two support legs can be maintained within a certain angle.