Falling down prevention apparatus for ladder

Abstract

The posted content relates to a ladder tipping prevention device that allows the extension length of an inner square pipe, which is retractably connected to an outer square pipe, to be variably adjusted according to the conditions of the work site, and prevents the ladder from tipping over due to loss of balance when performing high-altitude work while riding the ladder. A ladder anti-tipping device according to one embodiment of the present specification It is applied to an anti-tipping device mounted on the outer surface of a ladder to prevent tipping, and Outer square pipe; An inner square pipe slidably coupled to the outer square pipe; A detachment prevention device that prevents the inner square pipe from detaching from the outer square pipe; A locking device that locks or unlocks the inner square pipe, which is fixed to the outer surface of the outer square pipe and the inner square pipe and is elastically coupled to the outer square pipe, when pulled out to a predetermined length; wherein The above locking device is The present invention provides a ladder anti-tipping device characterized by including an upper fixing part fixed to the outer surface of the outer square pipe by a first fastening member that penetrates and is fastened, and a lower fixing part that supports the inner square pipe, which is integrally extended from the upper fixing part and is slidably coupled, and locks or unlocks the inner square pipe by a second fastening member that penetrates and is fastened by rotating in the forward and reverse directions of a handle.

Description

Technology Field

[0001] This specification relates to a ladder anti-tipping device for enhancing ladder stability during work at height. More specifically, it relates to a ladder anti-tipping device that allows the extension length of an inner square pipe, which is retractably coupled to an outer square pipe, to be variably adjusted to suit the conditions of the work site, and prevents the ladder from tipping over due to loss of balance while performing work at height. Background Technology

[0002] Unless otherwise indicated in this specification, the contents described in this section are not prior art for the claims of this application, and are not to be recognized as prior art simply because they are included in this section.

[0004] Generally, a ladder is a device made by placing two long vertical supports at regular intervals and then installing multiple short horizontal supports between them to allow movement upward by stepping on the horizontal supports.

[0005] The aforementioned ladder is primarily used when work must be performed at high places and is an essential piece of equipment at work sites; it is manufactured from metals such as aluminum to efficiently support the load applied when a user steps on it and to provide various functionalities.

[0006] As described above, the ladder can be classified into a single ladder in which a plurality of horizontal supports are installed at equal intervals between a pair of supports, and an A-type ladder in which the single ladders are installed facing each other and are foldable with respect to the upper part.

[0007] However, when working at a construction site, using only such a ladder inevitably makes the work quite inconvenient in confined spaces. Furthermore, when used at a construction site, a flat surface is often not secured, and the ladder supports are frequently used at an angle rather than horizontal due to uneven terrain or various obstacles.

[0008] When using such a ladder for work at heights, the center of gravity shifts to the top as the worker climbs to the upper part of the ladder; consequently, the ladder loses its balance and easily collapses, causing safety accidents.

[0009] To prevent safety accidents caused by the falling of ladders, regulations require that ladders be held by 2 to 4 people during high-altitude work; however, safety accidents frequently occur as these regulations are avoided due to work efficiency and labor shortages.

[0010] Therefore, there is a pressing need for the development of a ladder that allows workers to balance and use it themselves in confined spaces or on uneven floors, as well as a variable ladder that can be easily installed by the worker themselves depending on the conditions of the work site.

[0012] A folding ladder equipped with a variable outrigger is registered in Korean Patent Publication No. 10-1738331 (May 22, 2017). The problem to be solved

[0013] The embodiments of the present specification relate to a ladder tipping prevention device that can prevent an inner square pipe, which is retractably adjustable in length to an outer square pipe according to the conditions of the work site, from becoming detached and completely separated, and can prevent the ladder from tipping over due to loss of balance when performing high-altitude work while riding on the ladder.

[0014] The embodiments of this specification relate to a ladder anti-tipping device that allows an inner square pipe drawn out from an outer square pipe to be locked or unlocked in a one-touch manner by rotating a handle in the forward or reverse direction.

[0015] The embodiments of this specification relate to a ladder anti-tipping device in which a locking device can be securely fixed by double fastening it to an inner and outer square pipe with a plurality of bolts. means of solving the problem

[0016] According to one embodiment of the present specification, in order to achieve the above and other purposes of the present specification,

[0017] It is applied to an anti-tipping device mounted on the outer surface of a ladder to prevent tipping, and

[0018] Outer square pipe;

[0019] An inner square pipe slidably coupled to the outer square pipe;

[0020] A detachment prevention device that prevents the inner square pipe from detaching from the outer square pipe;

[0021] A locking device that locks or unlocks the inner square pipe, which is fixed to the outer surface of the outer square pipe and the inner square pipe and is elastically coupled to the outer square pipe, when pulled out to a predetermined length; wherein

[0022] The above locking device is

[0023] The present invention provides a ladder anti-tipping device characterized by including an upper fixing part fixed to the outer surface of the outer square pipe by a first fastening member that penetrates and is fastened, and a lower fixing part that supports the inner square pipe, which is integrally extended from the upper fixing part and is slidably coupled, and locks or unlocks the inner square pipe by a second fastening member that penetrates and is fastened by rotating in the forward and reverse directions of a handle. Effects of the invention

[0024] The ladder anti-tipping device according to the embodiment of the present specification having the above-described configuration has the following advantages.

[0025] According to an embodiment of the present specification, by preventing the inner square pipe, which is retractably adjustable in length to the outer square pipe, from becoming detached and completely separated, safety is improved, thereby protecting the worker from the risk of the ladder tipping over due to loss of balance while working at height while riding the ladder.

[0026] According to the embodiments of the present specification, the inner square pipe drawn out from the outer square pipe can be locked or unlocked in a one-touch manner by rotating the handle in the forward and reverse directions, thereby providing convenience and practicality to the user.

[0027] According to the embodiments of the present specification, the rigidity and durability of the ladder can be improved by double-fastening the locking device to the inner and outer square pipes with a plurality of bolts to securely fix it. Brief explanation of the drawing

[0028] FIG. 1 is a perspective view of a ladder anti-tipping device according to a preferred embodiment of the present specification, FIG. 2 is an exploded view of the ladder anti-tipping device shown in FIG. 1. FIG. 3(a,b) is an enlarged view of the main part of the ladder anti-tipping device shown in FIG. 1 and a cross-sectional view at line AA. FIG. 4 is a drawing showing the length of the ladder being adjusted by pulling out the inner square pipe in the ladder anti-tipping device shown in FIG. 1. FIG. 5 is a drawing showing the prevention of the inner square pipe from detaching from the outer square pipe in the ladder anti-tipping device illustrated in FIG. 1. FIG. 6 is a drawing showing the locking or unlocking of the inner square pipe by handle operation in the ladder anti-tipping device shown in FIG. 1. FIG. 7 is a drawing showing a locking device fixed to an inner square pipe and an outer square pipe in the ladder anti-tipping device shown in FIG. 1. Figure 8 is a diagram showing the usage state of the ladder anti-tipping device illustrated in Figure 1. Specific details for implementing the invention

[0029] Hereinafter, a ladder anti-tipping device according to a preferred embodiment of the present specification will be described in detail with reference to the attached drawings.

[0031] Referring to FIGS. 1 to 8, a ladder anti-tipping device according to one embodiment of the present specification

[0032] It is applied to an anti-tipping device (B) mounted on the outer surface of a ladder (A) (for example, a single ladder formed of ordinary aluminum material, or an A-type ladder, etc.) to prevent tipping during high-altitude work, and

[0033] outer square pipe (10);

[0034] An inner square pipe (12) that is slidably connected to an outer square pipe (10);

[0035] A detachment prevention device (14) that prevents the inner square pipe (12) from detaching and separating from the outer square pipe (10);

[0036] A locking device (16) that locks or unlocks the inner square pipe (12), which is fixed to the outer surface of the outer square pipe (10) and the inner square pipe (12) and is elastically coupled to the outer square pipe (10), when pulled out to a predetermined length;

[0037] The locking device (16) is

[0038] It is characterized by including an upper fixing part (18) that is fixed to the outer surface of the outer square pipe (10) by a first fastening member (42) that is fastened through, and a lower fixing part (24) that supports the inner square pipe (12) which is integrally extended from the upper fixing part (18) and is slidably connected, and locks or unlocks the inner square pipe (12) by a second fastening member (22) that is fastened through by rotating the handle (20) in the forward / reverse direction (clockwise, counterclockwise).

[0040] According to a more preferred embodiment, as shown in FIG. 5, the aforementioned anti-detachment member (14)

[0041] It is characterized by being fixed to the upper end of the inner square pipe (12), and when the inner square pipe (12) is pulled out by more than a predetermined length relative to the outer square pipe (10), the upper protruding projection (26) catches on the locking projection (28) of the outer square pipe (10) to prevent detachment and separation.

[0042] As shown in FIG. 5, the aforementioned anti-detachment device (14) is

[0043] A first rectangular protrusion (30) coupled to the upper inner side of the inner square pipe (12);

[0044] It is characterized by including a second protrusion (32) in the shape of a square that is extended and formed on the upper part of the first protrusion (30), is coupled to the lower inner side of the outer square pipe (10), and has a protruding jaw (26) formed on the four outer sides.

[0045] Although not shown in the drawing, the outer surface of the aforementioned inner square pipe (12) and outer square pipe (10)

[0046] It is characterized by including a surface protection layer (not shown) that is formed by any one of zinc plating, hot-dip galvanizing, electro-galvanizing, or nickel plating, or is applied to provide corrosion resistance and durability.

[0047] At this time, the technical content for forming a surface protection layer, such as zinc plating, hot-dip galvanizing, electro-galvanizing, nickel plating, or coating treatment, on the outer surface of the inner square pipe (12) and outer square pipe (10) forming the aforementioned ladder (A) to provide corrosion resistance and durability is applied substantially the same as the plating and painting methods commonly used in the technical field to which this specification belongs; therefore, a detailed description of the composition of the surface protection layer and the plating and painting methods is omitted.

[0048] As illustrated in FIG. 3a, the aforementioned handle (20) is formed in the shape of a lever and is characterized by being fixed to the outer end of the second fastening member (22).

[0049] As illustrated in FIGS. 2 and 5, the aforementioned anti-detachment device (14) is

[0050] It is characterized by being injection molded by a conventional injection mold, including a first protrusion (30) and a second protrusion (32) that is extended from the first protrusion (30) and has a protruding jaw (26) formed on the upper surface of the first protrusion (30).

[0051] As shown in FIGS. 2 and 4, an upper bracket (34) is rotatably fixed to the top of the aforementioned outer square pipe (10) by a fixing pin (48) and is detachably mounted on the outer surface of the ladder (A);

[0052] It is characterized by including a lower bracket (36) that is rotatably fixed to the bottom of the inner square pipe (12) by a fixing pin (48) and is supported in close contact with the ground.

[0053] Although not shown in the drawing, it is obvious that ordinary rubber or plastic materials can be used to prevent slipping of the anti-overturning device (B) during high-altitude work by increasing friction with the ground and fixing to the bottom surface of the lower bracket (36) mentioned above.

[0054] At this time, the technical description of fixing the upper end of the outer square pipe (10) to the outer surface of the ladder (A) rotatably by means of the aforementioned conventional upper bracket (34) and fixing the lower end of the inner square pipe (12) to be in close contact with the ground by means of the conventional lower bracket (36) is applied substantially the same as the upper bracket (34) and lower bracket (36) used to fix the upper and lower ends of the ladder (A) to the upper and lower ends of the anti-tipping device (B) commonly used in the technical field to which this specification belongs, so a detailed description of their configuration and function is omitted.

[0055] As illustrated in FIGS. 3a and 3b, one side of the aforementioned upper fixing part (18) is divided to form an upper compression part (40) in the shape of a conventional cam or block by a vertical cut (38) formed in the middle, and

[0056] One side of the lower fixed part (24) is divided to form a lower compression part (44) in the shape of a conventional cam or block by a vertical cut (38a) formed in the middle.

[0057] A horizontal cut (46) is formed between the upper compression part (40) and the lower compression part (44),

[0058] When the upper compression part (40) is fastened by the first fastening member (42), the upper fixing part (18) is fixed integrally to the outer square pipe (10), and

[0059] It is characterized by locking or unlocking the inner square pipe (12) by compressing or releasing the lower compression part (44) by the second fastening member (22) according to the rotational direction of the handle (20).

[0060] As shown in FIG. 5, the aforementioned anti-detachment member (14) can be detachably coupled to the inner side of the inner square pipe (12) by means of an elastic force by means of a rib (30a) formed on the outer surface of the first protrusion (30).

[0061] As shown in FIG. 2, the lower end of the inner square pipe (12) described above is formed to be rotatably supported on the lower bracket (36) by a fixing pin (48) and is formed on the edge of a pair of supporting plates (36b) that are formed oppositely (referring to the side closer to the ladder (A)), and is characterized by including a stopper (36a) to prevent the lower bracket (36) from rotating around the fixing pin (48) as a central axis when the inner square pipe (12) is extended and the bottom surface of the lower bracket (36) is pressed against the ground.

[0062] As a result, when preparing to work by extending the inner square pipe (12) relative to the outer square pipe (10) to ensure the bottom surface of the lower bracket (36) is in close contact with the ground in order to board the aforementioned ladder (A) and perform high-altitude work, the stopper (36a) prevents the lower bracket (36) from rotating in the reverse direction (counterclockwise) with the fixing pin (48) as the central axis, thereby allowing the bottom surface of the lower bracket (36) to be in close contact with the ground and enabling the ladder (A) to be supported in a stable state.

[0064] Hereinafter, an example of using a ladder anti-tipping device according to one embodiment of the present specification will be described with reference to the attached drawings.

[0065] As shown in FIGS. 1 to 8, when working at height while riding on the aforementioned ladder (A), the worker can be prevented from falling due to the ladder (A) tipping over by means of an anti-tipping device (B) fixed to the outer surface of the ladder (A) (see FIG. 8). In addition, depending on the conditions of the work site, the inner square pipe (12), which is retractably coupled to the outer square pipe (10), can be pulled out to a predetermined length, and then the inner square pipe (12) can be easily locked so that it does not move by operating the locking device (16) by one-touch operation of the handle (20), allowing the worker to work in a safe state.

[0066] To explain this in detail, when performing high-altitude work while riding on the aforementioned ladder (A), the length of the anti-tipping device (B) can be easily adjusted by operating the handle (20) with a single touch to suit the conditions of the work site.

[0067] That is, as shown in FIG. 4, the inner square pipe (12), which is slidably coupled to the outer square pipe (10) described above, is pulled out to a required predetermined length, and then the inner square pipe (12) is locked by a locking device (16) including a handle (20), thereby allowing it to be fixed so as not to move during high-altitude work.

[0068] At this time, as shown in FIG. 3a, when the aforementioned locking device (16) is fixed to the outer surface of the outer square pipe (10) and the inner square pipe (12), the upper fixing part (18) of the locking device (16) can be fixed integrally to the outer surface of the outer square pipe (10) by means of a first fastening member (42) that is fastened by penetrating the upper compression part (40), which is formed on one side of the locking device (16) and forms a cam or block shape by means of a vertical cut part (38) in the middle (i.e., acts as a clamp that compresses the upper compression part (40) to fix it to the outer surface of the outer square pipe (10) and maintains a fixed state at all times).

[0069] That is, by fastening the first fastening member (42), the upper compression part (40) formed symmetrically with respect to the cut part (38) is compressed, so the upper fixing part (18) of the locking device (16) can be fixed to the outer surface of the outer square pipe (10) so as not to move in the up and down direction.

[0070] Meanwhile, as shown in FIG. 3a and FIG. 3b, the lower compression part (44) is compressed by a second fastening member (22) which is formed on one side of the locking device (16) to be positioned below the aforementioned upper fixing part (18) and is fastened by penetrating the lower compression part (44), which is formed in the shape of a cam or block by an intermediate vertical cut (38a), so that the lower fixing part (24) of the locking device (16) can be fixed to the outer surface of the inner square pipe (12).

[0071] At the same time, as shown in FIG. 6, when the handle (20) fixed to the outer end of the aforementioned second fastening member (22) is grasped and rotated in the forward direction (clockwise), the lower compression part (44) is compressed based on the vertical cut portion (38a), thereby locking the inner square pipe (12) which is slidably coupled to the outer square pipe (10).

[0072] That is, as the handle (20) is rotated in the forward direction, the lower compression part (44), which is formed symmetrically with respect to the cut portion (38a) by the fastening of the second fastening member (22), is compressed, so that the inner square pipe (12), which is drawn out by a predetermined length relative to the outer square pipe (10) and whose length is variably adjusted, can be locked so that it does not move. That is, when the handle (20) is rotated in the forward direction (clockwise), the inner square pipe (12) can be locked, and on the other hand, when the handle (20) is rotated in the reverse direction (counterclockwise), the inner square pipe (12) can be unlocked.

[0073] As described above, the second fastening member (22) acts as a clamp that fixes the outer surface of the outer square pipe (10) by compressing the lower compression part (44), and at the same time acts as a locker that locks the inner square pipe (12) when the handle (20) is rotated in the forward direction (clockwise) (that is, convenience can be provided to the user by locking the inner square pipe (12) by operating the handle (20) in a one-touch manner).

[0074] As shown in FIGS. 4 and 5, when the inner square pipe (12) is pulled out from the outer square pipe (10) by rotating the aforementioned handle (20) in the reverse direction (counterclockwise) to unlock it, the inner square pipe (12) can be prevented from detaching from the outer square pipe (10) and separating by means of the anti-detachment member (14) fixed to the upper inner side of the inner square pipe (12).

[0075] That is, the square-shaped protruding projection (26) of the anti-detachment device (14) fixed to the upper end of the aforementioned inner square pipe (12) is caught on the catch projection (28) of the locking device (16) to prevent further movement, so that when the inner square pipe (12) is pulled out beyond a predetermined length, it can be prevented from detaching and separating from the outer square pipe (10) (i.e., safety can be improved by preventing complete separation when the inner square pipe (12) is pulled out beyond a predetermined length from the outer square pipe (10)).

[0077] Although the present specification has described preferred technical concepts by reference to examples, those skilled in the art to which the specification belongs will be able to make various modifications and equivalent alternative embodiments within the scope of the essential characteristics of the specification.

[0078] In other words, the disclosed content is merely an example and can be modified and implemented in various ways by a person skilled in the art without departing from the gist of the claim claimed in the scope of the claim; therefore, the scope of protection of the disclosed content is not limited to the specific embodiments described above.

[0079] Accordingly, the embodiments disclosed in this specification are intended to explain, not limit, the technical concept, and the scope of protection of this specification should be interpreted in accordance with the technical concept of the claims; furthermore, all technical concepts within an equivalent scope should be interpreted as being included within the scope of rights of this specification. Explanation of the symbols

[0080] 10; outer square pipe 12; inner square pipe 14; Derailment prevention zone 16; locking device 18; upper fixing part 20; handle 22; second fastening member 24; lower fixing part 26; protruding jaw 28; catch 30; first protrusion 32; second protrusion 34; upper bracket 36; lower bracket 38,38a; incision 40; upper compression part 42; First fastening member 44; lower compression part 46; incision 48; fixing pin A; ladder B; Anti-tipping device

Claims

Claim 1 An outer square pipe applied to an anti-tipping device mounted on the outer surface of a ladder to prevent tipping; an inner square pipe slidably coupled to the outer square pipe; and a detachment prevention device that prevents the inner square pipe from detaching from the outer square pipe; A locking device is provided for locking or unlocking the inner square pipe, which is fixed to the outer surface of the outer square pipe and the inner square pipe and is elastically coupled to the outer square pipe, when the inner square pipe is withdrawn to a predetermined length; wherein the locking device comprises an upper fixing part fixed to the outer surface of the outer square pipe by a first fastening member that is fastened through, and a lower fixing part that is integrally extended from the upper fixing part, supports the inner square pipe which is slidably coupled, and locks or unlocks the inner square pipe by a second fastening member that is fastened through by rotating the handle in the forward and reverse directions; and the anti-detachment device is fixed to the upper end of the inner square pipe and prevents the inner square pipe from detaching and separating when the inner square pipe is withdrawn to a length greater than a predetermined length relative to the outer square pipe by the upper protruding projection catching on the locking projection of the outer square pipe. A ladder anti-tipping device characterized by comprising: a first rectangular protrusion coupled to the upper inner side of the inner rectangular pipe; and a second rectangular protrusion extended from the upper side of the first protrusion, coupled to the lower inner side of the outer rectangular pipe, with the protruding ridge formed on four outer surfaces. Claim 2 delete Claim 3 delete Claim 4 A ladder anti-tipping device according to claim 1, further comprising a surface protection layer formed by zinc plating, hot-dip galvanizing, electro-galvanizing, or nickel plating, or applied to the outer surface of the inner square pipe and the outer square pipe to provide corrosion resistance and durability. Claim 5 A ladder anti-tipping device according to claim 1, characterized in that the handle is formed in a lever shape and is fixed to the outer end of the second fastening member. Claim 6 A ladder anti-tipping member according to claim 1, characterized in that the anti-tipping member comprises the first protrusion and the second protrusion, which is formed by injection molding and extends from the first protrusion and has the protruding ridge formed on the upper surface of the first protrusion. Claim 7 A ladder anti-tipping device according to claim 1, further comprising: an upper bracket rotatably fixed to the upper end of the outer square pipe and detachably mounted on the outer surface of the ladder; and a lower bracket rotatably fixed to the lower end of the inner square pipe and supported in close contact with the ground. Claim 8 A ladder anti-tipping device according to claim 1, wherein one side of the upper fixing part is divided into an upper compression part formed in the shape of a cam or block by a vertical cut formed in the middle, one side of the lower fixing part is divided into a lower compression part formed in the shape of a cam or block by a vertical cut formed in the middle, and a horizontal cut is formed between the upper compression part and the lower compression part, so that when the upper compression part is fastened by the first fastening member, the upper fixing part is fixed to the outer square pipe, and the inner square pipe is locked or unlocked by compressing or releasing the lower compression part by the second fastening member according to the rotational direction of the handle. Claim 9 A ladder anti-tipping device according to claim 7, further comprising a stopper formed on the edge of a pair of opposing support plates formed to rotatably support the lower end of the inner square pipe to the lower bracket by a fixing pin, and for preventing the lower bracket from rotating around the fixing pin as a central axis when the inner square pipe is extended to bring the bottom surface of the lower bracket into close contact with the ground.

Images