KR20150026664A

KR20150026664A - Safety ladder

Info

Publication number: KR20150026664A
Application number: KR20130106040A
Authority: KR
Inventors: 김치윤
Original assignee: 김치윤
Priority date: 2013-09-03
Filing date: 2013-09-03
Publication date: 2015-03-11

Abstract

A safety ladder according to the present invention is a ladder comprising a hollow ladder frame and a foot plate, a first ladder fixing pin hole is formed on one side of the frame, a ratchet fixing hinge is formed at an end of the frame, A length adjusting ratchet is coupled to the ratchet fixing hinge by a pin and a ladder length adjusting device having a predetermined length that can be inserted into the lower end of the frame is provided and the length adjusting ratchet is fixed to the ladder length adjusting device A plurality of second ladder fixing pin holes are formed at regular intervals from the lower end of the ratchet fixing groove so as to correspond to the intervals of the ratchet fixing grooves and correspond to the first ladder fixing pin holes And the first ladder fixing pin hole and the second ladder fixing pin hole can be engaged with each other For bridge and a fixed pin, characterized by configured by comprising a non-slip and a central portion coupled to the upper end of the ladder frame forming a suitable space is curved towards the back, and with the government and surrounding the curved portion of the government.
According to the present invention, since the length of the ladder can be arbitrarily adjusted, the ladder can be accurately fixed even when the ground surface is uneven, so that it is easy to balance, and the ladder has a fixing portion at the upper end thereof. And it can securely fix it, so that ladder work can be done safely.

Description

Safety ladder {SAFETY LADDER}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a safety ladder for improving the existing ladder and using the safety ladder in a workplace more safely. More particularly, the present invention relates to a safety ladder in which a ladder is fixed, To a safety ladder having a length adjuster capable of adjusting the length of the ladder separately

In general, the ladder, also known as the ladder, is made of wood, stand, rope, and light metal. There are wooden ladders, ladders, and prefabricated ladders. A wooden ladder is made by nailing or grooving several rails between two long pillars. When used, it can be used upright, can move freely, and is widely used in afforestation, architecture, civil engineering, gardening, etc. The line ladder is used by tying the rope to the rope instead of the column, which is often used as a military or a pioneer, and also used as an emergency. The metal ladder is made by welding or riveting, and it is designed to be assembled according to the purpose of use. In addition, in Chowon-yong, a ladder with scaffolding is used to assemble each piece into a triangle.

However, when the above general ladder is used in a place having a high columnar working position, such as a pole or a tree, the contact area between the ladder and the column is too small so that the ladder can be moved by a heavy work, When the ladder is not always flat and uneven, the two legs of the ladder can not be fixed exactly on the ground, so that the ladder may be shaken, and there is a problem that the ladder is a dangerous danger to the safety of the worker .

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a ladder having a long ladder so that the ladder can be securely fixed regardless of the situation of the ground, The present invention provides a safety ladder having a length adjusting device capable of separately controlling the ladder.

According to an aspect of the present invention for achieving the above object,

A ladder comprising a hollow ladder frame and a foot plate, wherein a first pin fixing hole for fixing the ladder is formed on one side of the frame, a ratchet fixing hinge is formed at an end of the frame, The ladder length adjusting device is provided with a ladder length adjusting device which is coupled by a hinge and a pin and has a predetermined length that can be inserted into the lower end of the frame. And a plurality of second ladder fixing pin holes are formed which are formed at regular intervals from the lower end and are equal to the intervals of the ratchet fixing grooves and correspond to the first ladder fixing pin holes, A ladder fixing pin for coupling the fixing pin hole and the second ladder fixing pin hole, And a non-slip part which surrounds the curved part of the fixing part and a fixing part which is coupled to the upper end of the ladder frame.

On the other hand, the shape of the curved portion of the fixing portion is semicircular or V-shaped.

According to the present invention, since the length of the ladder can be arbitrarily adjusted, the ladder can be accurately fixed even when the ground surface is uneven, so that it is easy to balance, and the ladder has a fixing portion at the upper end thereof. And it can securely fix it, so that ladder work can be done safely.

1 is a perspective view of an embodiment according to the present invention,
2 is a partial perspective view showing how the ladder length adjusting device operates,
3 is a view showing various embodiments of the fixing portion.

A safety ladder according to the present invention is a ladder comprising a hollow ladder frame and a foot plate, a first ladder fixing pin hole is formed on one side of the frame, a ratchet fixing hinge is formed at an end of the frame, A length adjusting ratchet is coupled to the ratchet fixing hinge by a pin and a ladder length adjusting device having a predetermined length that can be inserted into the lower end of the frame is provided and the length adjusting ratchet is fixed to the ladder length adjusting device A plurality of second ladder fixing pin holes are formed at regular intervals from the lower end of the ratchet fixing groove so as to correspond to the intervals of the ratchet fixing grooves and correspond to the first ladder fixing pin holes And the first ladder fixing pin hole and the second ladder fixing pin hole can be engaged with each other For bridge and a fixed pin, characterized by configured by comprising a non-slip and a central portion coupled to the upper end of the ladder frame forming a suitable space is curved towards the back, and with the government and surrounding the curved portion of the government.

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

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a partial perspective view illustrating how a ladder length adjusting apparatus operates, and FIG. 3 is a view illustrating various embodiments of a fixing unit.

The material of the safety ladder is not particularly limited. However, in order to work on a high electric pole or a tree, the length of the ladder should be long. In order to reduce the weight while maintaining the stability of the long ladder, it is preferable to use an aluminum alloy.

The ladder frame 10 and the footstep 11 are the same as the shape of a ladder which we usually use. However, the ladder frame 10 should be hollow so that the ladder length adjusting device 20 can be inserted. However, since most metal ladders have a hollow structure hollowed out to increase bending rigidity as well as a reason for reducing the weight thereof, the structure of the ladder frame 10 is the same as that of a general ladder .

The shape of the ladder frame 10 is not particularly limited. Therefore, the shape may be a square pillar or a cylindrical shape, and any shape that can function as another ladder is possible. However, in the embodiment of FIG. 1, the external shape of the ladder frame 10 is a quadrangular prism shape, but it is not limited thereto. Further, the shape of the foot plate 11 is not particularly limited.

The first ladder fixing pin hole 12 is for fixing the ladder frame 10 and the ladder length adjusting device 20. The first ladder fixing pin hole 12 and the second ladder fixing And the ladder fixing pin (30) is passed through and fixed in a state where the holes of the pinhole (22) are aligned with each other.

The ratchet fixing hinge 13 and the length-adjusting ratchet 14 are located at the lower end of the ladder frame 10 and are coupled by a pin or other coupling device. The ladder- When the ladder length adjusting device 20 is pulled downward from the lower end of the frame 10, the ladder length adjusting device 20 is lowered and the leg length of the ladder can be adjusted by a desired length. The leg length adjustment of the ladder is completed by being fitted into the groove 21. [

The ladder length adjusting device 20 has an external cross-sectional shape that is the same as the internal cross-sectional shape of the ladder frame 10 so as to be inserted into the ladder frame 10, 21 and the second ladder fixing pin hole 22 are formed.

The ratchet fixing grooves 21 are formed at one side surface of the ladder length adjusting device 20 at regular intervals. In order to finely adjust the length of the ladder, the intervals are formed to be narrow. Otherwise, . Therefore, there is no limitation on the interval. The length of the ratchet fixing groove 21 is set to be about 1/2 of the length of the ladder length adjusting device 20 because the ratchet fixing groove 21 is formed in the length of the ladder length adjusting device 20 The second ladder fixing pin hole 22 is formed to have the same length and the same length as the interval of the ratchet fixing groove 21 from the last portion formed after the bottom portion is formed to about half thereof .

2, the first ladder fixing pin hole 12 is formed at a position where the second ladder fixing pin hole 22 is formed for the first time from the lower end of the length-adjusting ratchet 14, Of the length-adjusting ratchet (14).

A method of adjusting the length of the ladder will be described with reference to FIGS. 1 and 2. FIG. The ladder fixing pin 30 for fixing the ladder is firstly removed, the ladder length adjusting device 20 is pulled downward by a desired length, and the lower end of the length adjusting ratchet 14 is inserted into the ratchet fixing groove 21 so that the ladder fixing pin 30 passes through the first ladder fixing pin hole 12 and the second ladder fixing pin hole 22 and is engaged therewith The length of the ladder is adjusted. If this procedure is applied to both legs of the ladder, it is possible to fix the ladder firmly because the leg length of both ladder can be adjusted separately even if the ground is rugged.

The ladder fixing pin 30 passes through the first ladder fixing pin hole 12 and the second ladder fixing pin hole 22 and is guided to the ladder frame 10 by the ladder length adjusting device 20, And the like.

The shape of the fixing portion 40 may be semicircular or V-shaped as shown in FIGS. 3A and 3B. In the case of a semicircular shape, the fixing portion 40 may be used in a cylindrical shape having a high work area such as a pole In the case of a V shape, it is used in an irregular shape such as a tree. At this time, the diameter of the semicircular curved portion is set to be 3 cm larger than the diameter of the pole of a conventional pole so that the fixed portion 40 can cover the pole, thereby fixing the ladder so as not to move. Also, even if the circumference is irregular like a tree, it can be made to have a V-shape so that both sides can come into contact with each other and fix the tree so as not to move left and right. In addition, A and B can be fixed with pins easily, so it can be changed according to the situation, thus improving practicality.

3, the fixing portion 40 is formed in a plate shape. However, since the fixing portion 40 is only an embodiment, the cross-sectional shape of the fixing portion 40 can be any shape such as a circle or a rectangle. It is not.

The non-slip portion 41 is engaged with the central portion of the curved portion of the fixing portion 40 to increase the frictional force, thereby further enhancing the stability of the ladder. At this time, there is no particular limitation on the material of the non-slip portion 41, but the material itself is preferably made of a rubber material having a large frictional force.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention .

Therefore, it should be understood that the present invention is not limited to the above-described embodiments, and various changes, substitutions, and alterations can be made without departing from the spirit of the present invention.

Claims

A ladder comprising a hollow ladder frame (10) and a foot plate (11), wherein a first ladder fixing pin hole (12) is formed on one side of the frame (10) A fixing hinge 13 is formed, a length-adjusting ratchet 14 is coupled to the ratchet fixing hinge 13 by a pin,
The ladder length adjusting device 20 is provided with a ladder length adjusting device 20 having a predetermined length that can be inserted into the lower end of the frame 10. The ladder length adjusting device 20 is provided with a plurality of A plurality of second ladder-fixing pin holes (21) are formed at regular intervals from the lower end of the ratchet fixing groove (21) and correspond to the intervals of the ratchet fixing grooves (21) (22) is formed,
A ladder fixing pin 30 for coupling the first ladder fixing pin hole 12 and the second ladder fixing pin hole 22,
And a non-slip part 41 which surrounds the curved part of the fixing part. The non-slip part 41 is formed of a metal plate, Safety ladder.