KR101914996B1 - Safety ladder - Google Patents

Abstract

The present invention relates to a safety ladder in which a worker climbs a foot frame supported slantingly by a unicycle to perform a ladder work,
In the present invention, a footrest frame having a plurality of footsteps formed thereon; A connecting frame formed on the foot frame; And a unipolar leg connected to the upper end of the connection frame by a hinge structure to support the foot frame in an inclined manner,
The unicubital leg comprises: a support tube; An adjustable tubular body that is installed in a support tube body in a retracted structure and moves back and forth in the longitudinal direction; And a clamping unit fixed to the support tube body and fixing the outer wall of the adjustment tube body advanced from the support tube body through a claw,
The supporting tube and the adjusting tube are concentrically arranged in the clamping unit so as to form a rod-shaped bar-shaped supporting body in which the supporting tube, the adjusting tube and the clamping unit are arranged in a line,
And the adjustment tube body extending in the longitudinal direction of the support tube body is configured to adjust the inclination of the foot frame by controlling the length of the unfixed foot supported by the foot frame by being restrained in the orthogonal direction by the claw provided in the clamp unit. do.

Description

Safety ladder {Safety ladder}

The present invention relates to a safety ladder, and more particularly, to a safety ladder in which a worker climbs a foot frame supported slantingly by a unicycle to perform a ladder work.

Safety ladders, as we know, are a useful tool to carry out complaints at heights above the height of a person, moving from various industrial sites or homes to multiple locations.

The safety ladder includes a foot frame having a plurality of foot plates arranged at regular intervals and a foot leg supporting the foot frame in an inclined manner. The operator can support the foot frame in a slant manner through the external foot, The footing of the frame is successively stepped up to perform the complaint operation.

However, when the safety ladder is installed on a non-uniform orchard or the like, it is difficult to maintain a certain degree of inclination of the foot frame supported through the external legs, because the supporting legs and the foot frame do not have the same supporting height.

For example, if the road surface on which the unicorn legs are supported is higher than the road surface on which the foot frame is supported, the inclination of the foot frame becomes excessively high, and there is a risk of overturning of the safety ladder due to the elevation work.

If the road surface on which the unicycle legs are supported is lower than the road surface on which the foot frame is supported, the inclination of the foot frame is excessively lowered, so that it is difficult to carry out the height work of the required height.

Although it is possible to solve some problems due to the variation of the height of the road surface by adjusting the support angle of the unicycle legs, if the unevenness of the support legs and the support frame is excessively varied, It is difficult to maintain a regular inclination.

KR 20-0347538 Y1 KR 20-0430922 Y1 KR 20-2000-0015699I

It is an object of the present invention, which is devised to solve the above-mentioned problems, to provide a pedestal frame structure in which the foot frame is configured to maintain a steep slope through the adjustment of the length of a unicycle to support the foot frame in an inclined manner, And it is possible to carry out the complicated operation steadily,

Particularly, since the clamping unit connected to the support tube and the adjusting tube in a line can adjust the length of the unicycle leg, the safety ladder securing precision and convenience according to the adjustment of the inclination angle of the foot frame by adjusting the length of the unicycle .

The above object is achieved by the following constitutions provided in the present invention.

In the safety ladder according to the present invention,

A footrest frame having a plurality of footsteps; A connecting frame formed on the foot frame; And a unidirectional leg connected to the upper end of the connection frame by a hinge structure to support the foot frame in an inclined manner,

And a clamp for fixing and fixing the outer wall of the adjusting tube fixed on the supporting tube and advancing in the supporting tube through a claw, wherein the clamping tube is fixed to the supporting tube, Unit,

Wherein the adjustment tube body extending in the longitudinal direction of the support tube body is configured to adjust the inclination of the foot frame by controlling the length of the unfixed foot supported by the foot frame by being restrained in the orthogonal direction by the claw provided in the clamp unit,

The supporting tube and the adjusting tube are arranged concentrically with the clamping unit so that the supporting tube, the adjusting tube and the clamping unit form a bar-like rod-shaped supporter aligned in a line,
An attachment groove is formed in the inner diameter of the tongue, and a claw having a 'C' type snap ring is provided in the attachment groove, so that the claw edge fixes the outer wall point of the adjustment tube.

Preferably, the clamp unit comprises: a hollow bracket fixed to an end of the support tube; A hollow cushion disposed in the hollow bracket in an up-and-down swiveling structure and having a cushioning hole formed therebetween so as to pass therethrough; And a tongue spring for tilting the tongue, which penetrates the adjusting tube, in an inclined manner,

The tilting and tilting tongue by the tongue spring is configured to advance in the longitudinal direction in the support tube body so that the adjustment tube passing through the crook of the tie ring is fixed in the orthogonal direction.

More preferably, the tongue is constituted by a hollow plate member formed with a supporting piece protruding on one side and formed with a unidirectional elevation piece integrally formed on one side, and a supporting hole for securing the supporting piece is formed on one inner wall of the hollow bracket in contact therewith And a collar slot is formed through the other side wall,

The tongue is configured to be tilted by turning in a forward direction due to the elastic force provided by the tongue spring and being rotated in the opposite direction by the external force provided through the rising piece to maintain the horizontal position.

As described above, according to the present invention, it is possible to provide a clamping unit for clamping a footing leg supporting the footing frame in an inclined manner by fixing the supporting body, the adjusting tube body, and the adjusting tube body advanced from the supporting tube body, So that the scaffold frame maintains a regular inclination.

With this configuration, the inclination of the foot frame can be prevented from becoming excessively high or low due to the height difference between the pedestal frame and the road surface on which the unicycle is supported.

In the present invention, a one-touch type clamp unit for sticking an adjusting tube that moves back and forth in the longitudinal direction and adjusts the total length of the unicycle legs in an orthogonal direction is added, so that the unicycle can be stably and easily adjusted in length.

Therefore, the safety ladder according to the present invention can adjust the stable length of the unicycle through simple manipulation of the locking and tilting without separate fastening process or pin inserting process, It is possible to adjust the exact length of the unicycle by fixing the arbitrary point without attaching it.

Particularly, since the clamp unit is arranged in a line through the assembly of the support tube forming the unicycle leg and the adjusting tube body to form a rod-shaped bar-like support body, the volume of the clamp unit becomes too large and portability and usability become inconvenient, It becomes difficult to overcome the problem of an excessive increase in manufacturing costs.

Fig. 1 shows the entire construction of a safety ladder proposed in the preferred embodiment of the present invention,
FIG. 2 is a functional state diagram showing a support state of a footrest frame through a stretchable type external foot in a safety ladder proposed as a preferred embodiment of the present invention,
FIG. 3 is a detailed view showing the entire construction of the clamp unit and its components in the safety ladder proposed in the preferred embodiment of the present invention,
Fig. 4 is a view showing a stretching state of the unicycle through the clamp unit in the safety ladder proposed in the preferred embodiment of the present invention,
FIG. 5 shows the detailed configuration and operation state of the 'A' portion in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a safety ladder according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the entire construction of a safety ladder proposed as a preferred embodiment of the present invention. FIG. 2 is a perspective view of a safety ladder according to a preferred embodiment of the present invention, FIG. 3 is a detailed view showing the entire configuration of the clamp unit and its constituent elements in the safety ladder proposed in the preferred embodiment of the present invention, and FIG. 4 is a view FIG. 5 shows the detailed configuration and operation state of the portion 'A' in FIG. 2. FIG. 5 is a view showing the extension and contraction state of the unicycle through the clamp unit in the safety ladder.

1 and 2, the safety ladder 1 proposed in the preferred embodiment of the present invention includes a foot frame 10 on which a plurality of foot plates 11 are formed, And a unipolar leg 30 connected to the connection frame 20 by a hinge structure at an upper end thereof to support the foot frame 10 in an inclined manner.

The pedestal frame 10, the connecting frame 20 and the unicycle legs 30 constituting the safety ladder 1 are generally made of an aluminum alloy material excellent in strength and light weight, A support piece (12, 31a) is disposed at a lower end portion of the outer leg (30) composed of a bar-like support so as to stably adhere to the ground.

The supporting piece 31a formed at the lower end of the unicycle leg is fixed in a rotating structure through the ball joint 31a-a as shown in Fig. 5 so that the receiving piece 31a is rotated through the ball joint 31a-a So as to stably adhere to various ground surfaces having different inclination degrees.

An auxiliary support portion 32b is formed at an upper portion of the unicuberus foot 30 made of the bar-like support so that the worker can take one foot through the connection frame 20, 30 function not only to support the foot frame but also to perform the function of the foot as necessary.

The safety ladder 1 constructed as described above is basically carried in a state in which the outer legs 30 are brought into close contact with the foot frame 10 during the transportation process and the volume is reduced. 30 are extended outward to support the foot frame 10 in which both lower ends are in close contact with the ground surface.

In the meantime, since the height of the road surface is not uniform due to the irregularities of the orchards and the like, the support legs 30 and the foot frame 10 do not have the same supporting height, so that the foot frame 10 supported by the foot bridge 30 forms a constant inclination It is difficult to do.

For example, if the height of the road surface on which the unicycle legs 30 are supported is higher than the road surface on which the foot frame 10 is supported, the inclination of the foot frame 10 becomes excessively high,

If the height of the road surface on which the unicycle legs 30 are supported is lower than the road surface on which the foot frame 10 is supported, the inclination of the foot frame 10 is excessively lowered.

Although it is possible to solve some of the problems due to the deviation of the road surface height by adjusting the deployment angle of the unicycle 30, if the height deviation of the road surface is excessive, It is difficult to maintain a constant degree of inclination.

In order to solve this problem, in the present invention, the footrests 30, which support the footrest frame 10 in an inclined manner, are configured to be elongated and adjustable in length, Thereby solving a general problem due to the height deviation of the supported road surface.

1 to 4, the extension / contraction type external flexion leg 30 includes a support tube 31 and an adjustment tube 32 which is installed in the support tube 31 in a retracted configuration and moves back and forth in the longitudinal direction 2A, when the road surface on which the foot frame 10 is supported is lower than the height of the road surface on which the external foot 30 is supported, the adjusting tube 32 is further inserted into the supporting tube 31, If the road surface on which the foot frame 10 is supported is higher than the height of the road surface on which the external foot 30 is supported as shown in FIG. 2B, the adjusting tube 32 is advanced from the supporting tube 31 By extending the length of the outer leg 30, the foot frame 10 can maintain a constant degree of inclination.

In this embodiment, the clamp unit 40 is fixed to the end of the support tube 31 and fixes the outer wall of the adjustment tube 32 advanced from the support tube 31 through the tumbler 42 .

The clamp unit 40 is disposed concentrically between the support tube 31 and the adjustment tube 32. The support tube 31 and the adjustment tube 32 and the clamp unit 40 are connected in a line, So that the volume of the outer legs 30 is prevented from being enlarged by the clamp unit 40 as a whole and the convenience and speed of the adjustment of the length of the outer legs 30 are secured.

3 to 4, the clamp unit 40 is fixed to the end of the support tube 31 to surround the outer diameter of the tube tube 32 advanced from the support tube 31, and the support tube 31 And a control tube 32 which is arranged in a hollow structure in the hollow portion of the hollow bracket 41 and penetrates the buttock hole 42a, And a tongue spring 43 for tilting the tongue 42 in an inclined manner.

At this time, the supporting tube 31, the hollow bracket 41 and the adjusting tube 32 are arranged concentrically to form a rod-shaped bar-shaped supporting body so that the length can be adjusted by extending and contracting while having a compact appearance.

The tongue piece 42 has a hollow plate body in which a support piece 42b is formed at one side to protrude and an elevation piece 42c is formed integrally with the other piece, and a hollow bracket 41, A support hole 41b-a for holding the support piece 42b is formed, and a collet slot 41b-b is formed through the other side inner wall.

Accordingly, the tongue piece 42 is rotated in the forward direction by the elastic force provided by the tongue spring 43 and is inclined, and is rotated in the reverse direction by the external force provided through the rising piece 42c, The up-and-down turning angle of the tucker 42 is limited by the height of the collar slot 41b-b.

Thus, in the state where the tongue 42 is kept horizontal, the adjusting tube 32 passing through the tongue 42a is not fixed, and the tongue 42 is held by the tongue- The outer wall of the adjusting tube 32 advanced from the supporting tube 31 is fixed by being fixed by the tangs 42. As shown in Fig.

The hollow bracket 41 is divided into a first divided pipe portion 41a which is fixed to the end of the supporting pipe body 31 and a second divided pipe portion 41b which surrounds the outer diameter of the adjusting pipe body 32 , And the support hole (41b-a) and the elevation slot (41b-b) with the lower part open are formed in the second partition tube portion (41b) surrounding the adjustment tube (32).

Therefore, in the manufacturing process, the tongue and tongue spring 42 and the tongue spring 43 are inserted and pre-assembled into the second divided tube portion 41b, and then the first divided tube portion 41a is assembled to the second divided tube portion 41b So that the claws 42, which are resiliently biased by the tapered springs 43, are arranged in the hollow bracket 41 in a revolving structure.

At this time, the upper part of the elevation shaft 41b-b is closed by the first partitioning tube part 41a which is stacked and assembled in a stepped structure on the second partitioning tube part 41b, The upright and downward turning angles are limited by the cutting height of the collar slot 41b-b.

The first branch pipe portion 41a and the second branch pipe portion 41b may be assembled through interference fit by hot press fitting or the like and may be assembled through fastening by correspondingly forming the fastening portions as in the present embodiment .

A stepped section is formed in the first branch pipe section 41a inserted into the end of the support pipe body 31 and is supported and fixed in a stepped structure at the end of the support pipe body 31. The first branch pipe section 41a A fixing bolt 44 for pressurizing and supporting the outer wall of the supporting tube 31 is fastened and fixed to the end of the supporting tube 31 through the fixing bolt 44.

The unilateral foot 30 having the bar-shaped bar-like support formed by arranging the clamp units 40 in a line between the support tube 31 and the adjustment tube 32 can adjust the length through advancement of the adjustment tube 32 And the clamping unit 40 adjusts the total length of the adjusting tube body 32. The length of the footing frame 10 can be adjusted by adjusting the length of the adjusting tube body 32. [

To this end, the worker elevates the tilting rods 42 inclined by the tongue springs 43 through the elevation shafts 42c as shown in FIG. 4A to level the tilting rods 42, Is inserted into and withdrawn from the support tube 31 to adjust the entire length of the external leg 30.

4 (b), when the elevation of the elevation claw 42c is released, the horizontal claw 42 rotates downward about the elevation 42b due to the biasing force provided by the biasing spring 43, Form a photo state.

The outer wall of the adjusting tube 32 passing through the crook hole 42a is fixedly attached to the crook tongue 42 of the tilted tongue 42 so that the adjusting tube 32 is supported by the supporting tube 31, So that the length of the unicycle leg 30 can be easily adjusted by the clamp unit 40.

On the other hand, the claws 42 for securing the outer wall of the regulating tube 32 repeatedly fix the point of the outer wall of the regulating tube 32, It is possible to cause a physical damage to the deadening pad 42d formed on the inner wall of the deadening hole 42a by the fixing pin 42a and to expect the fixing through the stable fixing of the adjusting pipe 32 when the deadening pad 42d is damaged it's difficult.

In order to solve this problem, in the present embodiment, the fastening tab 42a of the fastening tab 42 is not integrally formed with the fastening tab 42d, And is assembled with an insert structure on the inner wall so as to secure stable fixation of the adjusting tube 32 through the replacement of the periodically fixed toothing 42d.

In this embodiment, an attachment groove 42e is formed in the inner diameter of the tongue piece 42 and a claw 42d made of a 'C' type snap ring is disposed in the attachment groove 42e. So that the outer wall point of the adjusting tube 32 can be stably stuck and fixed.

With this configuration, when the canning 42d is damaged by abrasion or the like due to the repeated attachment of the adjusting tube 32, the operator does not replace the entire claw unit to replace the claw 42, It is possible to perform quick maintenance through the replacement of the locking claw 42d, which is composed of a snap ring assembled in an insert structure in the case 42.

1. Safety ladder
10. Scaffolding frame 11. Scaffolding
12. Base
20. Connection frame
30. Independent leg 31. Support tube
31a. 31a-a. Ball joint
32. Regulating tube 32a. Hinge
40. Clamp unit 41. Hollow bracket
41a. The first branch pipe portion 41b. The second sub-
41b-a. Support ball 41b-b. Colossus slot
42. Ties 42a. Cockroach
42b. Support piece 42c. Collar
42d. Locking Day 42e. Assembly groove
43. Tangential spring 44. Fixing bolt

Claims (3)

A footrest frame having a plurality of footsteps; A connecting frame formed on the foot frame; And a unidirectional leg connected to the upper end of the connection frame by a hinge structure to support the foot frame in an inclined manner,
And a clamp for fixing and fixing the outer wall of the adjusting tube fixed on the supporting tube and advancing in the supporting tube through a claw, wherein the clamping tube is fixed to the supporting tube, Unit,
Wherein the adjustment tube body extending in the longitudinal direction of the support tube body is configured to adjust the inclination of the foot frame by adjusting the length of the unfixed foot supported by the foot frame by being restrained in the orthogonal direction by the claw provided in the clamp unit,
The supporting tube and the adjusting tube are arranged concentrically with the clamping unit so that the supporting tube, the adjusting tube and the clamping unit form a bar-like rod-shaped supporter aligned in a line,
Characterized in that an attachment groove is formed in the inner diameter of the tongue, and a claw having a 'C' -shaped snap ring is provided in the attachment groove, so that the attachment point of the outer tube of the adjustment tube is secured by the claw. ladder. [2] The apparatus of claim 1, wherein the clamp unit comprises: a hollow bracket fixed to an end of the support tube and arranged in a line between the support tube and the adjustment tube surrounding the outer diameter of the adjustment tube; A hollow cushion disposed in the hollow portion of the hollow bracket in a revolving structure for securely fixing the adjusting tube passing through the cushion; And a tongue spring for tilting the tongue to be inclined,
Wherein the tilting pin is pivoted in the longitudinal direction of the supporting tube so as to fix the adjusting tube passing through the crook of the tilting pin in a direction orthogonal to the tilting pin. 3. The hollow bracket according to claim 2, wherein the tongue is made of a hollow plate formed with a support piece protruding on one side thereof and a float piece integrally formed on the other side, and a support hole for holding the support piece on an inner wall of one side of the hollow bracket, And a collar slot is formed through the inner wall of the other side,
The tongue is configured to be tilted forward and backward due to the lubrication force provided by the tongue spring and rotated in the opposite direction along the lug slot by an external force provided through the lug, Features a safety ladder.

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