KR20160003428U

KR20160003428U - Folding ladder

Info

Publication number: KR20160003428U
Application number: KR2020150001928U
Authority: KR
Inventors: 임한솔
Original assignee: 임한솔
Priority date: 2015-03-27
Filing date: 2015-03-27
Publication date: 2016-10-06
Also published as: KR200482937Y1

Abstract

The present invention relates to a folding ladder, and more particularly to a folding type ladder which, when performing a ladder operation, prevents an operator from losing balance and falls, The safety footrests are wide open so that workers can safely carry out work at high altitudes.
The present invention is characterized in that a pair of ladder (110) having a plurality of ladder rods (112) horizontally arranged at regular intervals between a pair of vertical supports (111) is folded by a hinge bracket (120) The safety foot 200 is folded when the middle portion of the folding type ladder 100 is rotated about the hinge axis 210 and both left and right ends of the folding ladder 100 are rotated around the rotation axis 220, And a guard rail 300 is installed on upper and lower portions of the folding type ladder 100 provided with the safety footrest 200 so as to be fixed to both left and right ends of the hinge bracket 120.

Description

Folding ladder

The present invention relates to a folding ladder, and more particularly to a folding type ladder which, when performing a ladder operation, prevents an operator from losing balance and falls, To a folding type ladder which allows a worker to safely carry out work in a high place by a wide spread safety footrest.

As shown in FIG. 1, a conventional folding type ladder is composed of a pair of vertical supports 1 and a pair of ladders 3 having a plurality of ladder bars 2 horizontally arranged at regular intervals, Between two ladder rods 2 opposed to each other on both side ladders 3, one end is hinged to one ladder rod 2 and the other end is connected to the other ladder rod 2 And a holding portion 11 for holding the ladder portion 10 to be detachably fitted to the ladder 3 so as to maintain the unfolded state of the two side ladders 3.

When the ladder 3 is lifted up by using the folding type ladder according to the related art, the ladder 3 of the opened state is held at the other side of the ladder 10, Is hooked on the opposed ladder bar 2 so that the folding type ladder stably stands up.

The conventional folding type ladder requires the operator to work on the ladder bar 2 having a narrow rod shape, so that the posture is unstable. There was a risk of falling.

Korean Patent Publication No. 10-2006-0109222

It is an object of the present invention to provide a folding type ladder that can be used by spreading a safety foot plate horizontally on both sides of a folding type ladder, And to prevent the worker from losing balance and falling due to the guard rails when the work is performed by climbing the safety footrest. The present invention is also directed to a folding type ladder.

In order to achieve the above object, the present invention is characterized in that a pair of ladder (110) having a plurality of ladder rods (112) horizontally arranged at regular intervals between a pair of vertical supports (111) is hinged by a hinge bracket The middle portion of the folding type ladder 100 is rotated around the hinge shaft 210 and the both ends of the folding type ladder 100 are rotated about the rotation axis 220 A guard rail 300 is installed on the hinge bracket 120 so as to be fixed to the left and right ends of the folding ladder 100, &Lt; / RTI >

The vertical support rods 111 of the folding type ladder 100 are formed by protruding a rotary shaft 220 to which both left and right ends of the safety footrest 200 are rotatably coupled and the rotary shaft 220 is protruded A polygonal fixed shaft 121 to which the front and rear ends of the guard rail 300 are respectively coupled is provided so as to protrude from both left and right ends of the hinge bracket 120 to which the vertical supports 111 are foldably hingedly coupled .

A rotary portion 311 having an inner diameter larger than the outer diameter of the fixed shaft 121 is formed at the front and rear ends of the guard rail 300. An upper portion of the rotary portion 311 is formed with the same diameter as the outer diameter of the fixed shaft 121 Each of the folding protrusions 310 formed integrally with the guide portion 312 having an inner diameter is formed to pass therethrough.

A stopper pin 122 protrudes outward from a lower portion of the hinge bracket 120 to which the stationary shaft 121 is coupled and is fixed to the stopper pin 122 by a fixing shaft 121 are provided at the lower end of the inner surface of the guard rail 300. As shown in FIG.

The folding type ladder of the present invention can be used by spreading the installation safety foot plate horizontally when using the ladder, so that the worker can perform the work required by the upper part of the folding type ladder safely and conveniently, The worker is prevented from losing balance and falling due to the guard rail when the worker goes up.

Fig. 1 is a perspective view showing an unfolded state of the conventional folding type ladder
2 is a front view showing the configuration of the folding type ladder according to the present invention
3 is a side view showing the configuration of the folding type ladder according to the present invention
Fig. 4 is a front view showing a state when the folding type ladder is stored according to the present invention
Fig. 5 is a side view showing the state of the folding type ladder during storage of the present invention
6 is a front view showing a state in which the safety footrest of the folding type ladder is unfolded
Fig. 7 is a front view showing a state in which the guard rail of the folding type ladder, which is the present invention,
Fig. 8 is an enlarged view showing a state in which the guard rail of the folding type ladder according to the present invention is operated to release the locking force
Fig. 9 is an enlarged view showing a folded state of the guard rail of the folding type ladder according to the present invention
10 is a front view showing a guard bar of the folding type ladder according to the present invention
Fig. 11 is an exploded view showing a state in which the guard bar for the folding type ladder is coupled to the ladder,

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

FIG. 2 is a front view showing the configuration of the folding type ladder according to the present invention, FIG. 3 is a side view showing the configuration of the folding type ladder according to the present invention, FIG. 4 is a front view showing the folding type ladder, FIG. 6 is a front view showing a state in which the safety footrest of the folding type ladder is unfolded, and FIG. 7 is a front view of the folding type ladder according to the present invention. Fig. 8 is an enlarged view showing a state in which the guard rail of the folding type ladder according to the present invention is operated so as to release the locking force, Fig. 9 is an enlarged view of the guard rail of the folding type ladder, 10 is a front view showing a guard bar of the folding type ladder according to the present invention, and FIG. 11 is an exploded view showing a state in which the guard bar for the folding type ladder is coupled to the ladder, to be.

As shown in FIGS. 2, 3, 4, and 5, the folding type ladder of the present invention includes a pair of vertical supports 111, a pair of ladder (110) is hingedly coupled to the upper end by a hinge bracket (120).

6, the folding type ladder 100 includes a safety foot 200 where an intermediate portion is rotated around a hinge shaft 210 and is folded when both left and right ends are rotated around a rotation axis, And a guard rail 300 is installed on the upper portion of the folding type ladder 100 provided with the safety footrest 200 so as to be fixed and rotatable on both left and right ends of the hinge bracket 120.

6 and 7 and 8 and 9, the left and right side ends of the safety footrest 200 are rotatably coupled to the vertical supports 111 of the folding type ladder 100 The front and rear end portions of the guard rail 300 are provided at both ends of the hinge bracket 120, which is rotatably coupled to the hinge bracket 120, A fixed shaft 121 having a polygonal shape is provided so as to protrude therefrom.

10, a rotation portion 311 having an inner diameter larger than the outer diameter of the fixed shaft 121 is formed at the front and rear ends of the guard rail 300, Each of the folding protrusions 310 formed integrally with the guide portion 312 having the same inner diameter as the outer diameter of the fixed shaft 121 is formed to pass through.

11, a stopper pin 122 is protruded outwardly from a lower portion of the hinge bracket 120 to which the fixed shaft 121 is coupled, and the stopper pin 122 is coupled to the stopper pin 122, A detachable locking member 320 is provided at the lower end of the inner surface of the guard rail 300.

In the present invention configured as described above, a pair of ladder 110, in which a plurality of ladder rods 112 are horizontally arranged at regular intervals between a pair of vertical supports 111, is hinged by a hinge bracket 120, And an intermediate portion is rotated about the hinge shaft 210 between the ladder 110 and the ladder 110 coupled by the hinge bracket 120 and a rotary shaft 220 having both left and right ends formed on the ladder, The safety footrest 200 is installed.

The polygonal fixing shafts 121 formed at both left and right ends of the hinge bracket 120 are fitted in the folding holes 310 of the guard rail 300 in which the rotation portion 311 and the guide portion 312 are integrally formed .

When the ladder 110 is rotated about the hinge bracket 120 for use, the ladder 110 and the ladder 110 are opened to rotate the safety foot 200 about the rotation axis 220 And the middle portion of the safety foot 200 separated from the center of the hinge shaft 210 is rotated and unfolded.

At this time, the safety footrest 200 is rotated around the hinge shaft 210 to a position where the separated middle ends are in close contact with each other, and is kept flat. Thus, the safety footrest 200 is lifted up by using the ladder 110 When the work is required, the worker can conveniently perform the work.

After the ladder 110 is unfolded so that the safety footplate 200 is unfolded as described above, it is rotated so that the guard rail 300 is positioned at a position where the operator is working.

9, the guard rail 300 is folded so that the fixed shaft 121 is attached to the side surface of the ladder 110 in a state where the fixed shaft 121 is positioned at the rotation portion 311. Therefore, The guard rail 300 can be rotated.

As a result, when the guard rail 300 is lifted up to the upper part of the ladder 110 so as to be positioned in a desired direction by the operator, the inner diameter of the rotary part 311 is larger than the outer diameter of the fixed shaft 121, When the guard rail 300 is rotated to be positioned at a desired position as described above, when the fixing shaft 121 is inserted into the guide portion 312 of the folding hole 310 as shown in FIG. 8, The inner diameter of the guide portion 312 is formed to be the same as the outer diameter of the fixed shaft, and the rotation is maintained while the interference fit is performed.

The locking member 320 installed at the lower end of the inner side surface of the guard rail 300 may be inserted into the hinge bracket 120 of the hinge bracket 120. [ And is coupled to a stopper pin 122 protruding from the lower portion of the safety foot plate 200 to support the body of the worker who is climbing the safety footboard 200 to perform work, It is prevented that the operator loses balance and falls due to the rail 300. [

When the folding type ladder 100 is to be folded and stored, the fixing shaft 121 is lifted upward to be pulled out from the guide portion 312 of the folding hole 310, The guard rail 300 is rotated in the direction of one side and the other side of the ladder 110 in a state where the fixed shaft 121 is positioned on the rotary part 311 while the fixed shaft 121 is positioned on the rotary part 311 And adheres to the side surface of the ladder 110.

After the guard rail 300 is rotated as described above, when the hinge bracket 120 is rotated around the hinge bracket 120 so that the distance between the ladder and the ladder becomes narrow, the gap between the ladder 110 and the ladder 110 becomes narrow, The safety foot 200 is rotated about the rotation axis 220 and the middle portion of the safety foot 200 is rotated around the hinge shaft 210 The left and right side portions are folded in a state of being separated from each other.

100: folding ladder 110: ladder
111: vertical support 112: ladder rod
120: Hinge bracket 121: Fixed shaft
122: stopper pin 210: hinge shaft
220: rotating shaft 200: safety footrest
300: Guard rail 310:
311: rotation part 312: guide part
320: Locking member

Claims

A pair of vertical supports 111 and a pair of ladder 110 having a plurality of ladder rods 112 horizontally arranged at regular intervals is hingedly coupled to the upper end of the ladder 110 by a hinge bracket 120 The safety footrest 200 is installed on the folding type ladder 100 so that the middle portion of the folding type ladder 100 is rotated about the hinge shaft 210 and folded when the left and right end portions of the folding type ladder 100 are rotated around the rotation axis 220 , And a guard rail (300) is installed on the upper portion of the folding type ladder (100) provided with the safety footrest (200) so as to be fixedly and rotatably supported on both left and right ends of the hinge bracket (120).

The vertical support (111) of the folding type ladder (100) is formed with a rotation shaft (220) protruding from both sides of the safety footrest (200) A polygonal fixed shaft 121, to which the front and rear ends of the guard rail 300 are respectively coupled, is protruded from both left and right ends of the hinge bracket 120, which is foldably coupled to the protruded vertical support 111 in a hinged manner. Wherein the folding ladder is folded.

The guard rail 300 is provided with a rotation part 311 having an inner diameter larger than the outer diameter of the fixing shaft 121 and a fixing shaft 121 is fixed to an upper part of the rotation part 311. [ Wherein each of the folding bosses (310) formed integrally with the guide portions (312) having the same inner diameter as the outer diameter is formed to pass through.

The hinge bracket according to claim 1, wherein a stopper pin (122) protrudes outward from a lower portion of the hinge bracket (120) to which the fixed shaft (121) is coupled, and the stopper pin And a locking member (320) coupled and separated according to the position of the fixed shaft (121) is installed at the lower end of the inner surface of the guard rail (300).