KR20090014067A - Ladder having a scaffold - Google Patents

Ladder having a scaffold Download PDF

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Publication number
KR20090014067A
KR20090014067A KR1020070078318A KR20070078318A KR20090014067A KR 20090014067 A KR20090014067 A KR 20090014067A KR 1020070078318 A KR1020070078318 A KR 1020070078318A KR 20070078318 A KR20070078318 A KR 20070078318A KR 20090014067 A KR20090014067 A KR 20090014067A
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KR
South Korea
Prior art keywords
horizontal
scaffolds
ladder
leg
scaffold
Prior art date
Application number
KR1020070078318A
Other languages
Korean (ko)
Inventor
이민재
Original Assignee
이민재
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이민재 filed Critical 이민재
Priority to KR1020070078318A priority Critical patent/KR20090014067A/en
Publication of KR20090014067A publication Critical patent/KR20090014067A/en

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/39—Ladders having platforms; Ladders changeable into platforms
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/16—Platforms on, or for use on, ladders, e.g. liftable or lowerable platforms
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/50—Joints or other connecting parts

Abstract

The present invention relates to a ladder having a built-in horizontal scaffold that can be unfolded as needed by the user to step on the ladder, the first step is provided so that the footrest is spaced apart from each other along the extension direction so that the operator can step up. A main ladder formed so that the leg and the second leg are foldable around the hinge, first and second horizontal scaffolds rotatably installed between the first leg and the second leg around the hinge, and the first and second legs. And a scaffolding fixing unit configured to fix the first and second horizontal scaffolds in a state where the upper surfaces of the second horizontal scaffolding are parallel to each other.

The ladder having a built-in horizontal scaffold according to the present invention does not need to carry the ladder and the horizontal scaffold separately, and provides an advantage of being able to use the desired form quickly as needed.

Description

Ladder with Horizontal Scaffolding {Ladder having a scaffold}

The present invention relates to a ladder with a built-in horizontal scaffold, and more particularly, to a ladder with a built-in horizontal scaffold that can be unfolded as needed by the user to step on the ladder to work.

At construction sites or at many work sites, ladders are useful to help workers reach high points. In recent years, two ladders are hinged so that they can be folded so that they can be used to support the ground without leaning against a wall.

In addition, horizontal construction (horses), which can be used by workers to work on high points such as ceilings, are often used in interior construction, paperwork, and construction sites.

The ladder can be easily climbed to a high point, but working on the ladder for a long time is inconvenient and dangerous. In addition, the horizontal scaffolding has a disadvantage in that the installation is complicated and inconvenient to move. Therefore, the worker has to select the appropriate tool and perform the work at the high point as needed, and there was the trouble of carrying the ladder and the horizontal scaffold together at every construction site.

The present invention can be used as a ladder, and an object of the present invention is to provide a ladder with a built-in horizontal scaffold that can be used as a horizontal scaffold that can be conveniently carried out by the operator if necessary.

A ladder having a built-in horizontal scaffold according to the present invention includes a main ladder and a hinge which are foldable around a hinge of a first leg portion and a second leg provided with a footrest spaced apart from each other along an extension direction so that an operator can step on it. The first and second horizontal scaffolds, which are rotatably installed between the first leg part and the second leg part, and the top and bottom surfaces of the first and second horizontal scaffolds, which are arranged parallel to each other. It is to be equipped with a scaffolding station which can be fixed.

The scaffolding fixing unit is configured to enter and fix the first and second horizontal scaffolds from the first and second leg portions in which the fixing pins face each other while the first and second horizontal scaffolds are laid out in parallel with each other. And pin insertion holes into which side pins may be inserted, respectively, on side surfaces of the second horizontal scaffold and first and second leg portions.

In addition, the scaffolding fixing portion is provided with a retraction lock pin that is elastically biased by an elastic member on the first or second leg portion or the first and second horizontal scaffolds, and is retractable. Inlet holes may be formed in the first and second horizontal scaffolds or the first and second leg portions to fix the horizontal scaffold.

In the first and second horizontal scaffolds, when the first and second horizontal scaffolds are rotated and unfolded in a lower state than the forward and backward anchor pins, they are formed at a point that interferes with the forward and backward anchor pins so as to retract the forward and backward anchor pins. It is preferable that the advance guide groove is formed so that the distance from the side of the first and second leg portion is gradually narrower as it extends to.

The ladder having a built-in horizontal scaffold according to the present invention does not need to carry the ladder and the horizontal scaffold separately, and provides an advantage of being able to use the desired form quickly as needed.

Referring to the accompanying drawings, a ladder having a horizontal scaffold according to the present invention will be described in detail as follows.

1 and 2 show a first embodiment of a ladder 10 incorporating a horizontal scaffold according to the present invention.

1 and 2, the ladder 10 having a horizontal scaffold includes a main ladder 11, first and second horizontal scaffolds 21 and 22 rotatably installed on the main ladder 11, and A scaffolding fixing part for fixing the first and second horizontal scaffolds 21 and 22 in an unfolded state is provided.

The main ladder 11 has two support frames 14 extending in parallel and spaced apart from each other, a footrest 15 coupled to each other so that an operator can step between the support frames 14, and each support frame ( 14, the first and second legs 12 and 13 having hinge coupling members 16 coupled to the upper ends thereof.

The hinge coupling member 16 has a pivot center of the first pin insertion hole 17 and the first and second leg portions 12 and 13 into which the fixing pin 30 applied as the scaffolding fixing part to be described later is inserted. Rotating center hole 18 to which the rotating shaft 20 is coupled is formed. By rotating the shaft 20 through the pivot center hole 18 of the hinge coupling member 16 to be engaged with each other, the first and second leg portions 12 and 13 are foldably coupled to each other. In addition, the hinge coupling member 16 is provided with a locking jaw 19 for limiting the rotation angle of the first and second leg portions 12 and 13, so that the locking jaw 19 of the hinge coupling member 16 facing each other. ) Contact each other to limit the rotation angle of the first and second leg portions 12,13.

Since the main ladder 11 has a configuration similar to that of a general folding ladder, the main ladder 11 can be supported on the ground by spreading the first and second leg portions 12 and 13 in the same manner as the general folding ladder, and then climb on the footrest 15. In addition, when moving or storing, it is easy to move and store by folding around the pivot shaft 20.

The first and second horizontal scaffolds 21 and 22 are rotatably installed between the main ladders 11, and an upper surface plate 23 and an upper surface plate 23 capable of providing a working space of a predetermined area, respectively. It has a side plate 24 extending downward from the edge of. A shaft insertion hole 25 into which the pivot shaft 20 can be inserted is formed at one side of both side plates 24, and the first and second horizontal scaffolds 21 and 22 rotate in opposite directions. It is coupled by the rotating shaft 20 so that it can be expanded or folded. In addition, a plurality of second pin insertion holes 26 are formed in the side plate 24, and the second pin insertion holes 26 are spaced along a rotation radius of the first and second horizontal scaffolds 21 and 22. It is formed spaced apart.

The scaffolding fixing part is intended to be fixed to the main ladder 11 with the first and second horizontal scaffolds 21 and 22 unfolded. In this embodiment, the first and second pin insertion holes 17 and 26 are fixed. A penetrating pin 30 was applied.

When a long time work is required at the ceiling or a high point, the operator unfolds the first and second horizontal scaffolds 21 and 22 so that the first pin insertion hole 17 and the second pin insertion hole 26 correspond to each other. When the fixing pin 30 passes through both the first pin insertion hole 17 and the second pin insertion hole 26, the nut 31 is fastened to the end of the fixing pin 30 so that the first and second horizontal portions are fastened. The scaffolds 21 and 22 are fixed in the unfolded state. When the first and second horizontal scaffolds 21 and 22 are fixed in an unfolded state, the upper plate 23 of the first and second horizontal scaffolds 21 and 22 may have a predetermined width. Since the work area is provided, the work can be performed more stably and comfortably than working on the step 15 of the ladder.

A plurality of second pin insertion holes 26 are formed along the rotational directions of the first and second horizontal scaffolds 21 and 22, and the fixing pin 30 is formed in the second pin insertion hole 26 formed at the lowermost portion. When inserted, the distance between the first and second leg portions 12 and 13 is narrowed, and the heights of the first and second horizontal scaffolds 21 and 22 are increased. On the contrary, when the fixing pin 30 is inserted into the second pin insertion hole 26 formed at the uppermost end, the first and second leg portions 12 and 13 are opened, and the height of the first and second horizontal scaffolds 21 and 22 is increased. Can be lowered. By selecting the second pin insertion hole 26 into which the fixing pin 30 is inserted, the installation heights of the first and second horizontal scaffolds 21 and 22 can be modified.

When the first and second horizontal scaffolds 21 and 22 are not used, the fixing pin 30 is separated. Since the first and second horizontal scaffolds 21 and 22 are not fixed by the fixing pin 30, the first and second horizontal scaffolds 21 and 22 are rotated such that both edges are located at the lower end.

3 to 5 show a second embodiment of a ladder 40 incorporating a horizontal scaffold. Referring to the drawings, the ladder 40 incorporating the horizontal scaffold of the present embodiment includes a main ladder 41, third and fourth horizontal scaffolds 51 and 52, and third and fourth horizontal scaffolds 51 and 52. ) Is provided with a scaffolding fixing part 60 for fixing in an unfolded state.

The main ladder 41 has third and fourth leg parts 42 and 43, and a rotation hole 47 into which the pivot shaft 20 can be inserted at the front end of the third and fourth leg parts 42 and 43. Is formed, a cap 44 is provided.

The cap 44 has a first member 45 and a second member 46 that are coupled to each other to form a predetermined internal space. The rotation hole 47 is formed in the first member 45. The through hole 48 is formed to protrude the fixing pin 61 of the scaffold fixing portion 60 to be described later.

The third and fourth horizontal scaffolds 51 and 52 are installed between the third and fourth leg portions 42 and 43 similarly to the first and second horizontal scaffolds 21 and 22, and the rotation shaft 20 The insertion hole 53 which can be inserted is formed so that the third and fourth horizontal scaffolds 51 and 52 are rotated to be unfolded or folded about the pivot shaft 20.

In addition, advance guide grooves 54 are formed at both side surfaces of the third and fourth horizontal scaffolds 51 and 52. The retreat guide groove 54 retreats the scaffolding fixing part 60 which fixes the third and fourth horizontal scaffolds 51 and 52 when the third and fourth horizontal scaffolds 51 and 52 are rotated upward. As the fixing pin 61 extends from the top to the bottom at the interference point, the separation distance from the side surfaces of the third and fourth leg parts 42 and 43 is gradually narrowed. In the lower part of the retreat guide groove 54, a retreat fixing hole 55 through which the retreat fixing pin 61 can be inserted and withdrawn is provided, and according to the withdrawal and withdrawal of the retreating fixing pin 61, the third and fourth horizontal holes are provided. Scaffolds 51 and 52 may be fixed or folded in an unfolded state.

The scaffold fixing part 60 moves forward and backward along the advance guide groove 54 to support the third and fourth horizontal scaffolds 51 and 52, and a forward and backward fix pin 61 and a forward and backward fix pin 61. An elastic member 68 elastically biased toward the fourth horizontal scaffold 51 and 52, and a housing 66 coupled to the first member 45 so as to surround the retreat fixing pin 61 and the elastic member 68; And a handle 69 which is connected to an end of the retreat fixing pin 61 so as to be gripped by the user so as to separate the retreat fixing pin 61 from the third and fourth horizontal scaffolds 51 and 52. .

The retraction lock pin 61 includes a protrusion 62 supporting lower ends of the third and fourth horizontal scaffolds 51 and 52, a spring support 63 formed at an end of the protrusion 62, and a spring support 63. And a retraction rod 64 extending from it.

The protrusion 62 corresponds to the inclined surface of the retreating guide groove 54 so that the frictional resistance with the inclined surface of the retreating guide groove 54 is not large when the third and fourth horizontal scaffolds 51 and 52 are rotated upward. It has a contact surface that is inclined. At the end of the retraction rod 64 is provided a bent portion 65 extending a predetermined length for engagement with the handle 69.

The housing 66 is coupled to the first member 45 so as to surround the forward and backward pin 61, and one side of the housing 66 coupled with the first member 45 may be inserted into the forward and backward pin 61. Open to Further, on the other side of the housing 66, a sliding hole 67 through which the advancing rod 64 can pass is provided. The sliding hole 67 is preferably formed to pass through the retreat rod 64 has a smaller diameter than the elastic member 68 to be described later.

The elastic member 68 is installed inside the housing 66 so as to surround the advance and retreat rod 64, one end of which is supported by the spring support part 63 and the other end of which is supported by the other inner side surface of the housing 66. An elastic force is applied such that the pin 61 is elastically biased toward the third and fourth horizontal scaffolds 51 and 52. In this embodiment, a compression spring was applied as the elastic member 68, and thus the elastic member 68 was installed inside the housing 66 to surround the advance and retreat rod 64. However, if the retreat fixing pin 61 can elastically bias toward the third and fourth horizontal scaffolds 51 and 52, various kinds of elastic members 68 may be applied.

The handle 69 is coupled to the end of the retraction rod 64 protruding through the sliding hole 67 of the housing 66. The handle 69 is formed with a fastening hole 70 into which the bent portion 65 of the advance and retreat rod 64 can be inserted. The bent portion 65 is inserted into the fastening hole 70 and then the bent portion ( 65 is bent to engage the handle 69 and the retraction rod 64. Since the handle 69 has an outer diameter larger than that of the housing 66, the handle 69 prevents the retraction fixing pin 61 from being separated from the housing 66 through one end of the opened housing 66. The handle 69 is formed so as to be easily gripped and pulled by the worker when forcibly retreating the fastening and fixing pin 61. Therefore, when the worker folds the third and fourth horizontal scaffolds 51 and 52, the worker grasps the handle 69 and retracts the forward and backward fixing pin 61, and then the third and fourth horizontal scaffolds 51 and 52 Rotate to fold.

Although not shown, the third and fourth leg portions 42 and 43 are disposed on the upper surfaces of the third and fourth horizontal scaffolds 51 and 52 in a state where the third and fourth horizontal scaffolds 51 and 52 are unfolded. Auxiliary scaffold formed on the outside of the support frame 14 may be further provided to facilitate the climb.

The remaining components of the present embodiment are the same in form and function as the components of the first embodiment shown in Figs. 1 and 2 are given the same reference numerals and detailed description thereof will be omitted.

6 and 7 show another embodiment of the pivot 80.

The rotation shaft 80 of the present embodiment is extended so that both ends have an outer diameter relatively larger than the diameter of the rotation hole 47 and the shaft insertion hole 53, the rotation hole 47 and the shaft insertion hole 53 It is provided with a rotation rod 81 extended to penetrate them, and two width fixing members 82 installed on the rotation rod.

The third and fourth horizontal scaffolds 51 and 52 and the cap 44 are rotatably coupled to the rotation region 83 formed between the width fixing member 82 and the end of the extended rotation rod 81. The third and fourth horizontal scaffolds 51 and 52 and the cap 44 are prevented from being separated from the rotation shaft 80 by the end of the rotation rod 81 and the width fixing member 82.

The method of using the ladder 40 with the built-in horizontal scaffold of the second embodiment is as follows.

When the work is performed at a high place, the main ladder 41 is moved to a work point. When the ladder is to be used, the third and fourth horizontal scaffolds 51 and 52 are used as they are folded.

When the third and fourth horizontal scaffolds 51 and 52 are to be unfolded, the third and fourth horizontal scaffolds 51 and 52 are grasped and rotated. While the third and fourth horizontal scaffolds 51 and 52 are unfolded, the retreat guide groove 54 interferes with the protrusion 62 of the retreat fixing pin 61, and the inclined surface of the retreat guide groove 54 is formed. Along the retreat fixing pin 61 retreats backward. When the top and bottom surfaces of the third and fourth horizontal scaffolds 51 and 52 are extended upward, the retreat fixing pin 61 that retreats along the retreating guide groove 54 is removed from the cap 44 by the elastic member 68. The protruding portion 62 is protruded into the advancing and fixing hole 55 to support the third and fourth horizontal scaffolds 51 and 52. Thus, the third and fourth horizontal scaffolds 51 and 52 are supported so that the horizontal state of the upper surface is automatically maintained only by the operator unfolding by hand.

When the third and fourth horizontal scaffolds 51 and 52 are folded again, the handle 69 is grasped and the retreat fixing pin 61 is forcibly retracted. When the forward and backward fixing pin 61 is retracted, the third and fourth horizontal scaffolds 51 and 52 are rotated and folded to extend in the vertical direction by gravity. When the handle 69 is released, the retreat fixing pin 61 is returned to the initial position at which the protrusion 62 protrudes toward the third and fourth horizontal scaffolds 51 and 52 by the elastic member 68.

Since a ladder having a horizontal scaffold of the present invention can be used simultaneously as a ladder and a horizontal scaffold, there is industrial applicability since it can be easily used in construction sites or at work or plastering work.

1 is a perspective view showing a first embodiment of a ladder having a built-in horizontal scaffold according to the present invention,

2 is an exploded perspective view of FIG. 1;

3 is an exploded perspective view showing a second embodiment of a ladder having a built-in horizontal scaffold according to the present invention;

FIG. 4 is a partially exploded perspective view illustrating the cap and the scaffolding portion of FIG. 3;

5 is a cross-sectional view of FIG.

6 is a cross-sectional view showing another embodiment of a rotating shaft;

FIG. 7 is a perspective view illustrating the rotational shaft of FIG. 6. FIG.

<Explanation of symbols for the main parts of the drawings>

10; Ladders with Horizontal Scaffolding

11; Main ladder 21; 1st horizontal scaffold

22; Second horizontal scaffold 30; Push pin

60; Scaffolding government 61; Retreat Locking Pin

66; A housing 68; Elastic member

Claims (4)

A main ladder having a first leg part and a second leg part which are provided to be spaced apart from each other in an extension direction so that an operator can step on the main body and being foldable around a hinge; First and second horizontal scaffolds rotatably installed between the first leg portion and the second leg portion around the hinge; And a scaffolding fixing unit configured to fix the first and second horizontal scaffolds in a state in which upper surfaces of the first and second horizontal scaffolds are parallel to each other. The method of claim 1, The scaffolding portion may enter and be fixed to the inside of the first and second horizontal scaffolds from the first and second leg portions in which the fixing pins face each other in a state where the first and second horizontal scaffolds are parallel to each other. And a sidewall of the first and second horizontal scaffolds and sidewalls of the first and second leg portions, wherein a pin insertion hole into which the fixing pin is inserted is formed, respectively. The method of claim 1, The scaffolding fixing portion is elastically biased by an elastic member on the first and second leg portions or the first and second horizontal scaffolds, and includes a retraction lock pin installed to be retractable. Built-in horizontal scaffold, characterized in that the entrance hole is formed in the first, second horizontal scaffold or the first, second leg to insert the retreat fixing pin is fixed to the first, second horizontal scaffold Ladder. The method of claim 3, wherein The first and second horizontal scaffolds are formed at a point where the first and second horizontal scaffolds interfere with the advance fixing pins when they are unfolded in a folded state below the advance fixing pins to retreat the advance fixing pins. Ladder with a horizontal scaffold, characterized in that provided as the extension guide groove is formed so that the distance from the upper side to the lower side to the first and second leg portion is gradually narrower.
KR1020070078318A 2007-08-03 2007-08-03 Ladder having a scaffold KR20090014067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070078318A KR20090014067A (en) 2007-08-03 2007-08-03 Ladder having a scaffold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070078318A KR20090014067A (en) 2007-08-03 2007-08-03 Ladder having a scaffold

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852447A (en) * 2012-09-17 2013-01-02 李理 Portable herringbone ladder
KR200473647Y1 (en) * 2013-03-19 2014-07-31 (주)보성하이테크 Leg fixing device of ladder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852447A (en) * 2012-09-17 2013-01-02 李理 Portable herringbone ladder
KR200473647Y1 (en) * 2013-03-19 2014-07-31 (주)보성하이테크 Leg fixing device of ladder

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