KR20200036123A - safety stepladder - Google Patents

Abstract

The present invention relates to a foldable A-shaped ladder, in which a third safety ladder (100) and a fourth safety wire (50) are formed for safety, thereby preventing accidents caused by shaking by weight and losing balance of an operator when the operator works at a high place or caused by the uneven ground or losing the center of weight of the ladder to fall when the operator moves to one side. Also, the safety ladder prevents waste of manpower and costs caused by a plurality of auxiliary operators for supporting the ladder.

Description

Safety stepladder

The present invention is a folding ladder, and for the purpose of providing a safety ladder that constitutes a third leg for safety purposes, and more specifically, in a work using the ladder, the worker loses balance, the ground is uneven, or the worker A safety ladder for preventing accidents due to a worker's fall as the ladder falls and falls over the center when moving to one side, and prevents waste of auxiliary manpower generated by holding a ladder by an assistant worker to support the ladder. .

Ladders used in construction and repair in modern society, that is, A-type ladders used in workshops, such as construction sites, are constructed in an "A" shape by constructing a step on a pair of leg members that are hinged and folded at regular intervals. Or it can be folded and transported.

Using a ladder constructed as described above, the weight is located at the top of the ladder as the worker climbs to the top of the ladder during high work, causing the ladder to lose its center and easily collapse, causing a safety accident.

In order to prevent such accidents, 2 ~ 4 people are required to hold the ladder in the aerial work, but safety accidents frequently occur by avoiding the above regulations due to work efficiency and labor shortage.

Prior art registration utility model No. 20-0412244 to improve such a problem was to improve the problem of falling over the front and rear and left and right by constructing an auxiliary leg that is coupled to the leg member of a general ladder and wider than the basic ladder. There is a problem that the problem caused by the weight located on the upper part cannot be solved only by the opening of the auxiliary leg.

Another prior art registration utility model No. 20-0390893 constitutes a pair of leg member auxiliary leg members constituting a ladder to provide a stable landing and a pair of flexible horizontal pipes that are leg member fixing means combined with ten crosses on the auxiliary leg. By fixing the leg member, the leg member is prevented from moving, but this configuration is merely a configuration for firmly fixing the pair of leg members, and thus has a problem of not improving the problem due to the weight formed on the top.

Utility Model No. 20-0479669 has a foldable outrigger leg (brace) on both sides of each leg constituting a pair of leg members so that the leg members are supported on a large area with the ground, but extends to the lower surface of the legs. However, the problem due to the weight of the upper part could not be reliably improved, and the problem due to the overweight was also not improved.

Unlike the invention described above, Patent Publication No. 10-2017-0088532 constitutes a pair of braces inside a pair of leg members, so that the effect is unpredictable.

These prior arts improve the problem that when the worker is working on the top of the ladder for high work, the weight is placed on the top and easily falls from the movement caused by the work, and also increases the risk of fall by working on the upper stepboard. There is a problem that is not being done.

Utility Model Registration No. 20-0412244. Utility Model Registration No. 20-0390893. Utility Model Registration No. 20-0479669. Patent Publication No. 10-2017-0088532.

The present invention is a folding-type "A" type ladder, and for safety purposes, the third safety ladder 100 and the fourth safety wire 50 are configured so that the operator loses balance due to the shaking due to weight during the aerial work or Preventing accidents when the ground is uneven, or the ladder falls and falls when the worker moves to one side and falls,

In order to support the ladder, it is to provide a safety ladder to prevent waste of manpower and expenses caused by a large number of auxiliary workers.

The solution of the present invention constitutes a "A" type ladder in which a pair of leg members 20 hinged by a hinge part 10 are folded and a footrest 21 is formed at regular intervals on the leg members 20,

A hinge hole 31 for fastening the third safety leg 100 to prevent the ladder from falling from side to side on the hinge shaft 11 of the hinge part 10 and the fourth safety wire 50 are fixed to the top. Bracket 30 which constitutes a through hole 32 for making, and a fastening hole 34 for hinged the third safety leg 100 to the wing part 33 bent at both sides,

Fixing with a bolt hole 41 hinged with a fastening bolt 35 penetrating through a fastening hole 34 drilled in the wing portion 33 of the bracket 30 and a plurality of adjusting holes 42 for adjusting the length Leg member 40 and

Locking key (43) fitted to the fixed leg member (40) and fastened to the adjustment hole (42) for adjusting the length, and a key hole (44) and a hook portion (46) for fastening the hook (51) of the fixed wire (45) to both sides ) Is a third safety leg (100) made of a telescopic leg (47) consisting of,

A fourth safety wire (50) comprising a clamp (52) for adjusting the length and length of the hook (51) in the through hole (32) of the bracket (30) and

The third safety leg 100 is fastened to any one of the pair of leg members 20 constituting the ladder with the bracket 30 for fastening the telescopic third safety leg 100 and the fourth safety wire 50. And a fourth safety wire 50, and a safety ladder that allows only one of the third safety bridge 100 and the fourth safety wire 50 to be selected.

And the fork plate 60 and the fork 61 through which the fork 61 protrudes at the end of the third safety leg 100 that controls the third safety leg 100 and the through hole 63 and the leg member through which the fork 61 passes ( It is intended to provide a safety ladder characterized in that the stopper 62 of the hinge portion 10 hinged 20) is configured to control the turning of the third safety leg by detachment of the fork 61.

The present invention prevents accidents in which a worker falls when the worker loses balance, the ground is uneven, or the ladder falls and falls when the worker moves to one side in the work using the folding ladder, and the ladder In order to support it, a safety ladder is provided to prevent the wasted workers from being wasted while holding the ladder by preventing the accident. It has the effect of preventing waste.

1 is a perspective view of an entire ladder in which an important part of the first embodiment of the present invention is disassembled.
Figure 2 is an exploded view of the extraction of the important part of Figure 1;
Figure 3 is a front view showing a ladder using state of the first embodiment of the present invention.
Figure 4 is an enlarged cross-sectional view of the important part extraction of Figure 3;
5 is a front view showing another example of the first embodiment of the present invention.
6 is a perspective view of a second embodiment of the present invention.
Figure 7 is a front view of the state of use of Figure 6 of the present invention.
8 is an exploded perspective view of an important part showing a third embodiment of the present invention.
9 is a cross-sectional view showing the embodiment of FIG. 8;

When explaining a preferred embodiment of the present invention with reference to the accompanying drawings.

This embodiment is provided in order to more fully describe the present invention to those having average knowledge in the art, and detailed descriptions of well-known functions and configurations determined to unnecessarily obscure the subject matter will be omitted and described.

1 and 5 showing a first embodiment of the present invention, a pair of leg members 20 hinged by a folding hinge portion 10 is folded and a footrest at regular intervals on the leg members 20 In which the "21" is composed of a safety ladder of the shape,

A safety leg for preventing the ladder from falling from side to side on the hinge shaft 11 of the hinge part 10, the hinge hole 31 for fastening the third safety leg 100 of the telescopic type and the fourth safety upward Bracket (30) constituting a through hole (32) for fixing the wire (50), and a fastening hole (34) for hinged the third safety leg (100) to the wing portion (33) bent on both sides,

Fixing with a bolt hole 41 hinged with a fastening bolt 35 penetrating through a fastening hole 34 drilled in the wing portion 33 of the bracket 30 and a plurality of adjusting holes 42 for adjusting the length The locking key 43 is fastened to the leg member 40 and the fixed leg member 40 and fastened to the adjustment hole 42 for adjusting the length expansion and contraction, and the key hole 44 to which the lock key 43 is fastened and the fixed wire 45 on both sides ) The third safety leg (100) made of a telescopic leg (47), which is composed of a hook (46) for fastening the hook (51),

The third safety leg 100 constitutes the stop protrusion 48 protruding from the third safety leg 100 as shown in FIG. 4, and the wing portions bent to both sides of the bracket 30 that interviews them 33 ) May be configured by selecting a configuration in which a plurality of control grooves 36, which are controlled by being fitted with a stop protrusion 48, are stopped by a control groove 36 section.

The through hole 32 of the bracket 30 is provided with a clamp 52 of a fastening device (aka cicada hook) for adjusting and towing the length, and a fourth with a telescopic third safety leg 100 Construct the safety wire 50, but configure the third safety leg 100 and the fourth safety wire 50 on both sides of the ladder or select only one of the third safety leg 100 and the fourth safety wire 50 So that it can be configured.

In addition, the fourth safety wire 50 is selected as necessary, such as a wire and a band.

6 and 7, a pair of ladders constituting a bracket 30 for fastening the telescopic third safety leg 100 and the fourth safety wire 50 as shown in FIGS. 6 and 7 of the second embodiment of the present invention It is made of an embodiment in which the third safety leg 100 and the fourth safety wire 50 are formed by fastening to any one of the leg members 20.

And as shown in Figure 7, the bracket 30 is fastened to the leg member 20 is configured to be fixed to the leg member 20 using a bolted or detachable clamp 37, the removable clamp 37 By this, the third safety leg 100 can be easily mounted and detached.

The third safety leg 100 and the fourth safety wire 50 of the present invention is preferably composed of both sides of the leg member 20 constituting the ladder, but the third safety leg 100 and the fourth safety wire 50 ) It is natural that it may be composed of only two or any one, and it is natural that the fourth safety wire 50 may use the illustrated resin material, metal wire, band, or the like.

Along with this, the third embodiment of the present invention includes a plurality of forks 61 at the ends of the third safety legs 100 hinged to both wing portions 33 of the bracket 30 as shown in FIGS. 8 and 9. Fastening the protruding fork plate 60, and the bracket 30, through the through hole 63 through which the fork 61 passes, to the hinge portion 10 through which the fork 61 penetrates and hinges the leg member 20. A plurality of stop holes 62 into which the forks 61 are inserted are configured.

At this time, it is preferable to extend the distance between the hinge hole 31 and the through hole 32 of the bracket 30 so that the stop hole 62 is formed.

This configuration is the third safety leg 100 mounted in a right angle direction from the hinge part 10 of the safety ladder, such as the configuration for controlling the left and right movement of the safety leg with the stop protrusion 48 and the control groove 36 described above. ) Does not move arbitrarily and the installation angle is maintained under the control of the user.

Reference numeral 200 denotes a fixed object at the work site for fixing the fourth safety wire 50.

When explaining a preferred embodiment with reference to the accompanying drawings, the effect of the present invention configured as described above is as follows.

As is well known, when working at a height higher than the worker's height in the construction, repair, etc. of a building, the "A" type ladder of the present invention is used as known, and when using this ladder, the upper hinge part 10 at the working position ), A pair of leg members 20 hinged with "A" is laid out as shown.

And for safety, the leg member 20 is provided with a third safety leg 100 hinged to the bracket 30 formed in the hinge part 10 constituting the pair of leg members 20 so that the ladder does not fall and maintain safety. It spreads in a right angle direction and is installed by spreading the new third agent leg 100.

That is, the third safety leg 100 hinged to the bracket 30 fastened to the hinge shaft 11 of the hinge part 10 is spread out to the side from a pair of leg members 20 to the both sides of the ladder as shown in FIG. The third safety leg 100 is to be installed.

In this installation, the locking key 43 fixing the fixed leg member 40 and the elastic leg member 47 constituting the third safety leg 100 on the left and right sides is separated, and the elastic leg member 47 is moved up and down. After the end face is in close contact with the ground, and the ladder is maintained in safety, the third safety leg 100 is firmly supported by fastening the expansion and contraction member 47 by fastening the lock key 43.

 And for safety, the third safety leg 100 is secured by fastening the hook 51 of the fixed wire 45 formed on the pair of leg members 20 formed back and forth to the hook portion 46 of the third safety leg 100. The third safety leg 100 is prevented from being opened by being fixed at a fixed position so as to meet the supplementary safety, and it is preferable to maintain the robustness by selecting and fastening the hook portion 46 in a plurality. Do.

In this installed state, the worker can climb the footrest (21) composed of the pair of leg members (20) and perform a high-altitude operation. At this time, the third safety formed from side to side with the safety by the "A" shape formed before and after It is to be able to safely work by preventing the tipping or the tipping of the legs 100 from side to side.

In addition, the present invention comprises a wire coupling through hole 32 in the bracket 30 hingedly coupling the third safety leg 100 so as to achieve more secure safety, and a fourth wire is coupled to the through hole 32. Safety wire 50 was constructed.

The fourth safety wire 50 may be used together with the third safety leg 100 or may be used separately.

The fourth safety wire 50 is fixed to the fourth safety wire 50 fixed to the bracket 30 as shown in FIG. 5 to a fixed object 200 of the work site, or a fourth safety wire ( Fix it by using the hook (51) configured in 50).

In addition, by adjusting the length of the fourth safety wire 50 and fixing it with a clamp 52, the ladder is firmly and stably fixed by the fourth safety wire 50 to prevent accidents during work. It will be effective.

The third safety leg 100 and the fourth safety wire 50 of the present invention is preferably composed of both sides of the leg member 20 constituting the ladder, and the third safety leg 100 and the fourth safety wire 50 Of course, it can be composed of two or only one.

In addition, the third safety leg 100 protrudes from the third safety leg 100 when the third safety leg 100 is pivotally moved when the third safety leg 100 is expanded or folded as shown in FIG. 4. The stop protrusions 48 are engaged with the stop protrusions 48 of the bent wing portions 33 on both sides of the bracket 30 in contact with it, thereby maintaining a combined position, thereby being supported at a constant position.

In addition, the control groove 36 may be configured in plural to adjust the opening angle of the third safety leg 100.

In this configuration, in case of concern about lack of robustness only by the control groove 36 coupled with the stop protrusion 48, a configuration using the fork 61 shown in FIGS. 8 and 9 of the third embodiment of the present invention is adopted. You can.

In this third embodiment, as shown in FIGS. 8 and 9, the third safety legs 100 hinged to both wing portions 33 of the bracket 30 are moved back and forth to form a plurality of forks 61 configured at end portions. Moving and moving the third safety leg (100) by turning the fork (61) through the through hole (63) drilled in the bracket (30), the stop hole (10) hinged to the hinge member (10) By being fastened to 62, the third safety leg 100 is fixed at a certain position.

Accordingly, the third safety leg 100 is fixed at a set position, thereby maintaining the safety of the ladder by exerting a solid support with the leg member 20, and when canceling this, the third safety leg 100 is inward. When moving, the fork 61 is detached from the stop hole 62 and the through hole 63 so that it can rotate freely, so that the ladder can be conveniently folded.

It is preferable to extend the distance between the hinge hole 31 and the through hole 32 of the bracket 30 so that the stop hole 62 is formed.

In addition, in FIG. 7, the third safety leg 100 is simple and simple with the detachable clamp 37 by allowing the bracket 30 fastened to the leg member 20 to be detachable from the leg member 20 with the detachable clamp 37. It can be conveniently mounted or detached.

In addition, the bracket 30 fastened to the leg member 20 can be fastened to the leg member 20 using a separate fastening bolt, or can be fastened using a clamp (not shown). Needless to say, the wire 50 may use the illustrated resin material, metal wire, or band.

The present invention prevents accidents in which a worker falls when the worker loses balance, the ground is uneven, or the ladder falls and falls when the worker moves to one side in the work using the folding ladder, and the ladder In order to support, it is to provide a safety ladder to prevent waste of auxiliary manpower generated by holding the ladder by the assistant worker.

The present invention has been described above with reference to the preferred embodiments, but there may be various equivalents and modifications that can replace them, and the present invention is not limited to the above-described embodiments and without departing from the gist of the present invention. It is a matter of course that any person can have various modifications, and such changes are within the scope of the claims.

10: hinge part 11: hinge shaft 20: leg member
21: footrest 30: bracket 31: hinge ball
32: through hole 33: wing portion 34: fastener
35: fastening bolt 36: control groove 37: removable clamp
40: fixed leg member 41: bolt hole 42: adjustment hole
43: Lock key 44: Key hole 45: Fixed wire
46: ring portion 47: telescopic leg 48: stop projection
50: 4th safety wire 51: hook 52: clamp
60: fork plate 61: fork 62: stop ball
63: through hole 100: third safety leg

Claims (5)

In the safety ladder made of a "A" type of a pair of leg members 20 hinged by the hinge portion 10 is folded and the foot member 21 is formed at regular intervals on the leg member 20,

A hinge hole 31 for fastening the third safety leg 100 to prevent the ladder from falling from side to side on the hinge shaft 11 of the hinge part 10 and the fourth safety wire 50 are fixed to the top. A bracket 30 which constitutes a through hole 32 for making and a fastening hole 34 for hinged the third safety leg 100 to the wing portions 33 bent at both sides,

Fixing with a bolt hole 41 hinged with a fastening bolt 35 penetrating through the fastening hole 34 drilled in the wing portion 33 of the bracket 30 and a plurality of adjusting holes 42 for adjusting the length Leg member 40 and
Locking key 43 fitted to the fixed leg member 40 and fastened to the adjusting hole 42 for adjusting the length, and the key hole 44 and the hook portion for fastening the hook 51 of the fixing wire 45 to both sides Safety ladder characterized in that it constitutes a third safety leg (100) consisting of a telescopic leg (47) is composed.
According to claim 1,
Fastening the fork plate 60 protruding the fork 61 to the end of the third safety leg 100 hinged to both wing portions 33 of the bracket 30 and the fork 61 to the bracket 30 The third safety leg is formed by forming a stop hole 62 through which the fork 61 is inserted through the through hole 63 penetrating therethrough and the fork 61 is inserted into the hinge part 10 hinged to the leg member 20. A safety ladder characterized by allowing turning to be controlled.
According to claim 1,
Safety ladder characterized in that the bracket 30 fastened to the leg member 20 is configured to be detachable from the mounting and detachable clamp 37.
According to claim 1,
The third safety leg 100 is fastened to any one of the pair of leg members 20 constituting the ladder with the bracket 30 for fastening the telescopic third safety leg 100 and the fourth safety wire 50. And a fourth safety wire (50).
According to claim 1,
The stop protrusions 48 protruding from the third safety leg 100 are constituted, and a plurality of control grooves 36 controlled by fitting the stop protrusions 48 to both wing portions 33 of the bracket 30 are configured to form a section Safety ladder characterized in that it is configured to be stopped.

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