KR102588273B1 - Scaffolding Ladder Available to be Combined with Ladders - Google Patents

Abstract

The present invention relates to a wooden ladder that can be used as a workbench in combination with a ladder. According to the present invention, a bottom part that constitutes the bottom of the workbench, some components of which are rotatable and can be coupled to the top of the ladder, and the bottom part It is supported and separated from the ground, and when combined with a ladder, it rotates upward to become a handrail, and is installed for storage on both sides of the floor. It is equipped with a handrail to prevent the worker from falling, so it can be easily combined with other types of ladders. , it is possible to provide a wooden ladder that can be used as a workbench by combining it with a ladder that provides a legal workbench with increased height and safety.

Description

{Scaffolding Ladder Available to be Combined with Ladders}

The present invention relates to a horse ladder, and in particular, to a horse ladder that can be used alone or in combination with a ladder and used as a workbench for the ladder.

The recently revised Occupational Safety and Health Act has made it impossible to work on existing ladders that do not have scaffolding or handrails.

In addition, the horse-shaped ladder that satisfies the revised Occupational Safety and Health Act standards has limitations in increasing the height and has problems such as increasing additional costs.

To improve these problems, Korea Registered Utility Model No. 20-0465423, “Workbench with Detachable Auxiliary Plate,” is designed to be a workbench that can work at high heights by utilizing existing ladders, thereby increasing the usability of existing ladders. A high workbench is provided.

However, Korea Registered Utility Model No. 20-0465423 uses an existing ladder, but the components are separated, making it impossible to carry easily, multiple ladders are required, and it does not include legal components such as safety railings. There were problems such as not doing so.

Therefore, there is a need for the development of work equipment such as a horse ladder that improves the above problems.

The problem to be solved by the present invention is to provide a ladder that can be used alone as a ladder, and can be used as a ladder workbench in combination with a ladder.

In order to solve the above problems, the wooden ladder that can be used as a workbench in combination with a ladder according to an embodiment of the present invention includes a bottom part that constitutes the bottom of the workbench and can be coupled to the top of the ladder; It may include a leg part that supports the floor part, separates it from the ground, and rotates upward when combined with a ladder to become a handrail, and a handrail part that is installed on both sides of the floor part and prevents the worker from falling.

In addition, the bottom portion includes a plurality of main frames formed to have a length on both sides; It may include one or more connection frames connecting the main frames and a footrest located between the main frames.

In addition, the main frame includes an upper storage space formed in a 'ㄷ' shape with an open top where the handrail is stored; A lower storage space formed in a 'ㄷ' shape with an open bottom so that the legs and other components can be further stored; It may include a step support that protrudes along the longitudinal direction of the inner surface of the main frame and is installed at the top of the step portion, and a plurality of ladder fixing holes formed near the center to secure a ladder through which a fixing member passes and is coupled.

In addition, the scaffold unit includes one or more pivoting scaffolds rotatably coupled to one side of the main frame; Including one or more fixed scaffolds fixedly coupled to the main frame and a ladder coupling hole formed on a center side in the longitudinal direction through which the coupled ladder can pass, and when coupled with the ladder, the worker opens the rotating scaffold upward and moves downward. It is possible to move to the upper part of the floor through a combined ladder.

In addition, the leg portion includes a plurality of vertical legs, one end of which is rotatably coupled to the main frame and fixed in conjunction with a handrail when rotated toward the upper side of the floor, and a horizontal leg connecting the vertical legs installed on the same pivot axis. Including, when combined with the ladder, it can rotate toward the upper side of the floor to serve as a handrail.

In addition, the vertical leg may include an outer leg constituting the outer leg and an inner leg capable of sliding within the outer leg.

Here, the inner leg may include one or more fixing holes formed in the direction in which the horizontal leg is fixed.

At this time, the horizontal leg may include a fixing pin that is inserted into the fixing hole to fix the inner leg, and a fixing pin groove that allows the fixing pin to be inserted and move.

In addition, the railing portion is a horizontal railing installed horizontally with the floor at the top and capable of being coupled to the vertical legs at both ends, and a plurality of vertical railings each of which is rotatably coupled to the horizontal railing and the main frame at both ends. may include.

Here, the vertical railing includes one or more vertical railing joints so that the vertical railing can be folded and stacked, and the vertical railing folded by the vertical railing joint can be stored in the upper storage space while being rotated and stored in the horizontal railing.

In addition, it may further include an auxiliary fixing part that is stored in the lower storage space and fixes the leg part.

Here, the auxiliary fixing part may be separated from the lower storage space and the leg part and coupled between the vertical railings.

In addition, it may further include one or more external fixing bars connecting and fixing the outer bar of the ladder and the main frame.

Here, the ladder may include an external fixing bar coupling groove that allows the external fixing bar to be fixed at a predetermined angle.

The wooden ladder, which can be used as a workbench in combination with the ladder according to the embodiment of the present invention as described above, can be used as a workbench with a relatively low height and safe configuration when used alone.

Additionally, it can be combined with various types of ladders, making it possible to use it as a high work platform with the necessary safety features.

In addition, the components of the ladder can be rotated, folded, or detachable and can be stored inside the frame, making it easy to carry and store.

Figure 1 is a perspective view of a horse ladder that can be used as a workbench in combination with a ladder according to an embodiment of the present invention.
Figure 2 is a perspective view of the handrail of the horse ladder shown in Figure 1 in a stowed state.
Figure 3 is a perspective view showing the deformed form of the horse ladder shown in Figure 1 when combined with another ladder.
Figure 4 is a combined example showing a state in which the horse ladder of the type shown in Figure 3 is coupled to a type A ladder.
Figure 5(a) is a perspective view showing the bottom of Figure 1, and Figure 5(b) is an exemplary operation diagram of the pivoting step shown in Figure 5(a).
Figure 6 is a bottom perspective view of the bottom shown in Figure 5.
FIG. 7 is a front view of the mainframe shown in FIG. 5.
Figure 8 is an exploded perspective view of the leg portion shown in Figure 1.
Figure 9 is a bottom perspective view of the horizontal bridge shown in Figure 8.
Figure 10 is an exemplary diagram showing the handrail shown in Figure 1 in a partially folded state.
Figure 11 is a side view showing the auxiliary fixing part included in the horse ladder that can be used as a workbench by combining with a ladder according to an embodiment of the present invention, and is stored in the lower storage space to fix the legs.
Figure 12 is a side view showing the auxiliary fixing part shown in Figure 10 additionally fixing the handrail.
Figure 13 (a) is a perspective view showing a state in which components that can be stored in the bottom of a wooden ladder that can be used as a workbench in combination with a ladder according to an embodiment of the present invention are stored in the bottom, and Figure 13 (b) is a perspective view of Figure 13 This is a bottom perspective view showing the stowable components of the wooden ladder, which can be used as a workbench by combining with the ladder shown in (a), stored in the bottom.
Figure 14 is a bottom perspective view showing an example of the use of an external fixing bar and an external fixing bar coupling groove when a wooden ladder that can be used as a workbench by combining with a ladder according to an embodiment of the present invention is combined with an A-type ladder.

Hereinafter, the description of the present invention with reference to the drawings is not limited to specific embodiments, and various changes may be made and various embodiments may be possible. In addition, the content described below should be understood to include all conversions, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In the following description, the terms first, second, etc. are terms used to describe various components, and their meaning is not limited, and is used only for the purpose of distinguishing one component from other components.

Like reference numerals used throughout this specification refer to like elements.

As used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In addition, terms such as “comprise,” “provide,” or “have” used below are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. It should be construed and understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Hereinafter, with reference to FIGS. 1 to 14, a stepladder (hereinafter referred to as a "stepladder") that can be used as a workbench in combination with a ladder according to an embodiment of the present invention will be described in detail.

Figure 1 is a perspective view of a horse ladder that can be used as a workbench in combination with a ladder according to an embodiment of the present invention, and Figure 2 is a perspective view of a state in which the handrail shown in Figure 1 is stored.

In addition, Figure 3 is a perspective view showing the deformed form of the horse ladder of Figure 1 when combined with another ladder, and Figure 4 is a perspective view illustrating the form shown in Figure 3 combined with a type A ladder.

Referring to Figures 1 and 2, the wooden ladder according to an embodiment of the present invention can be generally used as a wooden ladder used for work at a relatively low height, and can be modified into the form shown in Figure 3 and combined with several ladders. Includes a safe configuration so that it can be used as a high-height workbench. Figure 4 shows an example in which the modified form of the horse ladder shown in Figure 3 is combined with a type A ladder, but the type of ladder to which it is combined is not limited.

In addition, it is appropriate for each component of the present invention to use a material that has little deformation in shape and is strong enough to support the worker and work equipment even when they stand on the workbench.

Referring to Figures 1 to 4, the horse ladder 10 according to an embodiment of the present invention includes a bottom portion 100 that constitutes the bottom of a workbench and can be coupled to the top of the ladder, supports the bottom portion, and is spaced from the ground. It may include a leg part 200 and a handrail part 300 installed on both sides of the floor to prevent the worker from falling.

Figure 5 (a) is a perspective view showing the bottom of Figure 1, and Figure 5 (b) is an example of operation of the pivoting step shown in Figure 5 (a).

And, Figure 6 is a bottom perspective view of the bottom shown in Figure 5.

The floor portion 100 necessarily provides sufficient space for workers to climb up and work, but the area is not limited. Additionally, the shape may be rectangular as shown in FIGS. 1 to 6, but the shape is not necessarily limited.

Referring to Figures 5 and 6, the floor portion 100 constituting the horse ladder 10 according to an embodiment of the present invention includes a plurality of main frames 110 formed to have a length on both sides, and a plurality of It may be composed of one or more connection frames 120 connecting the main frames, and a footrest 130 located between the main frames 110 for the worker to climb on.

Here, the main frame 110 may be configured as a pair on both sides of the bottom 100 as shown in the drawing, but the number is not limited.

In addition, the main frame 110 and the connecting frame 120 are distinguished as different elements in explaining the configuration, but they can be manufactured as one piece depending on the manufacturing method, and can be combined in an unlimited number of ways, such as welding or fastening members. It can be treated and used as a single entity.

Figure 7 is a front view of the mainframe shown in Figure 5.

Referring to Figures 6 and 7, the main frame 110 according to an embodiment of the present invention has an upper storage space 111 formed in a 'ㄷ' shape with an open top and a 'ㄷ' shape with an open bottom. The lower storage space 112, the footrest support 113 that protrudes along the longitudinal direction inside the main frame 110 to support the footrest 130 and prevent it from falling down, near the center of the main frame 110 in the longitudinal direction. It includes one or more ladder fixing holes 114 formed in and through which a ladder fixing member (not shown) such as a ring or pin passes and secures the ladder coupled to the lower part.

Here, the upper storage space 111 mainly accommodates the handrail 300, but other components other than the handrail 300 can also be accommodated so as not to interfere with the storage of the handrail. To this end, the length, width, and depth can be accommodated. is not limited, but is preferably formed to meet the required size.

In addition, since the lower storage space 112 can accommodate more diverse components, including the leg portion 200, it is important to have sufficient depth to completely accommodate each component, and accordingly, the length, width, and depth are Although it is not limited, it is desirable to be formed in a line that satisfies the required size.

The footrest support 113 is formed to protrude to have a length along the longitudinal direction of the main frame 110, and its length or protrusion width is not limited, but it is a line that sufficiently secures a passage for the worker to climb up the footrest portion 130. must be formed in In addition, in order to support the footrest portion 130, it must be formed below the position of the footrest portion 130, and may be fixedly coupled in contact with the footrest portion 130 in various ways, but this is not limited. In addition, there may be an unlimited number of changes in shape, such as the middle part being broken or a groove being formed so as not to interfere with the connection with the ladder.

One or more ladder fixing holes 114 may exist near the center of the main frame 110, and correspond to a non-limited type of ladder fixing member (not shown) for combining and fixing multiple ladders to the ladder 10. It can take various forms. Additionally, regardless of the shape of the main frame 100, it is desirable to be formed so as not to be obscured by other components.

The footrest unit 130 can be divided into a fixed footrest 131 and a pivoting footrest 132 as shown in the drawing, and the pivoting footrest 132 is rotatably coupled to the main frame 110 on one side in the form of a hinge, etc., so that the operator can use it. Open the rotating footrest 132 upward to facilitate movement over the floor 100.

Here, it is preferable that the connecting frame 120 and the pivoting step 132 are not installed overlapping so as to avoid inconvenience to the worker in moving, but the connection frame 120 and the pivoting step 132 are not limited thereto. ) can be installed in any number of one or more as long as they overlap each other and do not interfere with the movement of the worker.

Additionally, the number of fixed scaffolds 131 and rotating scaffolds 132 is not limited.

In addition, the fixed footrest 131 is fixed in position through welding or other members, and the method or joining position is not limited, and the pivoting footrest 132 can be opened by rotating if the rotation axis is on the same straight line. The number of coupling members such as hinges is not limited and is connected to the main frame 110.

In addition, the step portion 130 may form a ladder coupling hole 133 through which a portion of the ladder coupled to the center side in the longitudinal direction passes. At this time, the ladder coupling hole 133 is preferably formed on the fixed step 131 for stable coupling with the ladder, but is not limited thereto. The shape and number of the ladder coupling holes 133 are also determined by the ladder being coupled. In contrast to not limiting the type, it is preferable not to be limited.

As shown in FIGS. 1 and 2, the leg portion 200 serves as a bridge to support the footrest portion 130 and separate it from the ground when the horse ladder 10 is used alone, as shown in FIGS. 3 and 4. As described above, when combined with another ladder, it rotates to the upper side of the floor portion 100 and serves as a side railing.

Here, the leg portions 200 are installed in an unlimited number depending on the shape of the horse ladder 10, and must be installed in a position where they can rotate to function as both a handrail and a bridge.

Figure 8 is an exploded perspective view of the leg portion shown in Figure 1, and Figure 9 is a bottom perspective view of the horizontal leg shown in Figure 8.

Referring to FIG. 8, the leg portion 200 according to an embodiment of the present invention is rotatably coupled to the main frame 110 and is fixed by engaging with the handrail portion 300 when rotating upward to the floor portion 100. It includes a plurality of vertical legs 210 and a horizontal leg 220 connecting the vertical legs 210 installed on the same pivot axis.

Here, the vertical legs 210 may be installed in an unlimited number depending on the shape of the bottom 100, but when combined with the ladder, the leg portion 200 rotates upward to serve as a handrail. ) is preferably installed to be rotatable at an appropriate position on the main frame 110.

In addition, as shown in FIG. 3, the vertical leg 210 can be fixed by being coupled to both ends of the horizontal railing 310 of the handrail 300 when it is rotated to the upper side of the floor 100. Various coupling methods can be applied, such as fastening the vertical leg 210 and the handrail 300 to each other with fastening members, or forming protrusions and grooves and fitting them, but this is not limited.

In addition, the horizontal leg 220 must be sufficiently strongly coupled to the vertical leg 210 so that the worker can climb on it, and must be installed only between the vertical legs 210 located on the same rotation axis to enable rotation of the leg portion 200. It is desirable to be

Although the vertical leg 210 and the horizontal leg 220 are distinguished as different elements in explaining the configuration, they can be manufactured as one piece depending on the manufacturing method, and can be coupled in any way, such as welding or fastening members.

The vertical leg 210 includes an outer leg 211 constituting the outer surface of the leg and an inner leg 212 capable of sliding within the outer leg 211.

Here, the outer leg 211 and the inner leg 212 are shown to have a square cross-section, but since this is an example for carrying out the present invention, they may be formed in a shape other than a square.

In addition, the inner leg 212 is preferably formed to have a thickness that minimizes the space between the inner leg 212 and the outer leg 211 when combined to prevent shaking due to steps within the outer leg 211. A protective cap may be installed at the bottom end to prevent slipping and absorb shock.

As shown in FIG. 8 according to an embodiment of the present invention, the length of the leg can be adjusted by sliding the inner leg 212 within the outer leg 211, and the inner leg 212 One or more fixing holes 213 may be formed on the side where the horizontal leg 220 is fixed to prevent movement and have a fixed length.

Here, referring to FIG. 9, the horizontal leg 220 is inserted into the fixing hole 213 and has a fixing pin 221 for fixing the inner leg 212 and the fixing pin 221 is inserted and moves. It includes a fixing pin groove 222 that allows.

At this time, the number or spacing of the fixing holes 213 is not limited, and may be formed in a direction other than the side on which the horizontal leg 220 is fixed.

Additionally, the fixing pin 221 may have various shapes that can be inserted into the fixing hole 213, including a 'ㅜ' shape.

In addition, the fixing pin 221 is not limited to being received in the fixing pin groove 222 of the horizontal leg 220 as shown in the drawing, and the means for moving and fixing the fixing pin 221 are as shown in the drawing. It is not limited to a spring, and the shape of the fixing pin groove 222 can also be modified accordingly.

Figure 10 is an exemplary diagram showing the handrail shown in Figure 1 in a partially folded state.

As shown in FIGS. 1 and 3, the handrail 300 is pulled out from the main frame 110 when in use and serves as a handrail to prevent the worker from falling. As shown in FIG. 2, when the handrail is unnecessary, the handrail 300 is used as a handrail. The components can be stacked and stored in the main frame 110.

Here, the handrail portion 300 can be installed in an unlimited number depending on the shape of the horse ladder 10.

Referring to Figures 1, 2, and 10, the handrail part 300 is installed horizontally with the floor at the top and includes a horizontal handrail 310 to which the vertical legs can be coupled at both ends, and a horizontal handrail 310. It may include a plurality of vertical railings 320, both ends of which are rotatably coupled to the main frame 110.

The horizontal railing 310 is not limited in length, width, and height, but must have an appropriate length, width, and height that can sufficiently prevent workers from falling on the floor 100 and can be stored in the main frame.

In addition, as shown in Figure 3, the horizontal railing 310 can be fixed by combining the vertical legs 210 at both ends, but the connection method is not limited, and additional connecting members may also exist, but are not limited.

The vertical railing 320 is installed to be rotatable below the horizontal railing 310. The number is not limited, but it is preferable that they are installed at appropriate intervals so as not to interfere with each other when stored in the horizontal railing 310.

Referring to Figure 9, the vertical railing 320 may include one or more vertical railing joints 321 in the middle so that they can be folded and overlapped, and the vertical railing joints 321 are in the unfolded state of the vertical railing 320. In order to be able to maintain it stably, it is desirable to form it so that it does not unfold more than 180 degrees.

The handrail unit 300 configured as described above accommodates the vertical handrail 320 completely overlapped by the vertical handrail joint 321, and is stored in the upper storage space 111 of the main frame 110.

However, the handrail portion 300 may be accommodated not by folding by the vertical handrail joint 321 but also through other coupling methods such as attachment and detachment.

Figure 11 is a side view showing the auxiliary fixing part included in the horse ladder that can be used as a workbench by combining with a ladder according to an embodiment of the present invention, and is stored in the lower storage space to fix the leg, and Figure 12 is a side view shown in Figure 11. This is a side view showing how the auxiliary fixing part is fixed to a handrail in the form of a horse ladder combined with another ladder.

Referring to FIG. 11, when the leg portion 200 functions as a leg on the lower side of the floor portion 100, the horse ladder 10 is stored in the lower storage space 112 to fix the movement of the leg portion 200. It may further include an auxiliary fixing part 400.

In addition, referring to Figures 11 and 12, the auxiliary fixing part 400 is separated from the leg part 200, and can be pulled out from the lower storage space 112 and installed in the middle of the handrail part 300.

Here, as shown in the drawing, the auxiliary fixing parts 400 may exist in a number that can be accommodated one by one in one main frame, but the number is not limited thereto.

In addition, the method of detachment and bonding and the position of bonding are not limited.

In addition, the auxiliary fixing part 400 is additionally rotatably coupled and has auxiliary components that can be stored inside, but this is not limited to the form of a straight bar, bent bar, or wire, and the number of the auxiliary components is also not limited.

Figure 13 (a) is a perspective view showing a state in which components that can be stored in the wooden ladder according to an embodiment of the present invention are stored in the bottom, and Figure 13 (b) is a wooden ladder shown in Figure 13 (a). This is a bottom perspective view showing the storageable components stored in the bottom.

Referring to Figures 13 (a) and 13 (b), the horse ladder 10 of the present invention stores the handrail 300 in the upper storage space 111 for easy carrying and storage, and has an auxiliary storage space. The top 400 and the leg portion 200 can be stored in the lower storage space 112.

Here, the storage position of each component may not be limited depending on the change in the shape of the horse ladder 10, and accordingly, the upper storage space 111 and the lower storage space 112 have sufficient width, length, and depth. desirable.

At this time, in order to avoid storage interference caused by the horizontal leg 220 of the leg portion 200, it is preferable that a groove exists in the inner direction of the lower storage space 112 in the main frame 110, and the size of the groove The form is not limited.

Additionally, it may include subsidiary materials for fixing the stored subsidiary materials for convenience of storage and movement.

Figure 14 is a bottom perspective view showing an example of the use of an external fixing bar and an external fixing bar coupling groove when a wooden ladder that can be used as a workbench by combining with a ladder according to an embodiment of the present invention is combined with an A-type ladder.

Referring to Figure 14, the present invention can further secure safety through additional fixation with the ladder (L) by including an external fixing bar (S) in the configuration.

In addition, the A-shaped ladder (L) includes an external fixing bar coupling groove (H) to which the external fixing bar (S) is coupled.

At this time, it is preferable that the external fixing bar (S) is fixed to the external fixing bar coupling groove (H) so that it cannot move, thereby increasing the stability of the combination between the horse ladder (10) and the A-type ladder.

Here, additional components such as a fall prevention band (not shown) attached to the A-type ladder (L) may exist.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features of the present invention. You will be able to understand it. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

10: Horse ladder 100: Bottom part
110: main frame 111: upper storage space
112: Lower storage space 113: Footrest support
114: Ladder fixing hole 120: Connection frame
130: footrest 131: fixed footrest
132: Rotating scaffold 133: Ladder coupling hole
200: leg portion 210: vertical leg
211: outer leg 212: inner leg
213: fixing hole 220: horizontal leg
221: fixing pin 222: fixing pin groove
300: Handrail 310: Horizontal railing
320: Vertical railing 321: Vertical railing joint
400: Auxiliary fixture L: Type A ladder
S: External fixing bar H: External fixing bar coupling groove

Claims (9)

A bottom portion that constitutes the bottom of the workbench and can be coupled to the top of the ladder;
A leg portion that is rotatably coupled to the front and rear ends of the floor, supports the floor and separates it from the ground, and can rotate upward to form a handrail when combined with a ladder.
It is installed on both sides of the floor and includes handrails to prevent workers from falling,
The bottom part,
A plurality of main frames formed to have length on both sides;
One or more connection frames connecting the main frames and
It includes a footrest located between the main frames,
The mainframe is,
An upper storage space formed in a 'ㄷ' shape with an open top, where the handrail is stored;
A lower storage space formed in a 'L' shape with an open bottom, where the legs and other components can be further stored;
A footrest support projecting along the longitudinal direction on the inner surface of the main frame and installing the footrest portion at the top, and
A wooden ladder that is formed in plural near the center and can be used as a workbench by combining with a ladder including a ladder fixing hole for fixing the ladder through which the fixing member passes and is coupled.
delete delete A bottom portion that constitutes the bottom of the workbench and can be coupled to the top of the ladder;
A leg portion that is rotatably coupled to the front and rear ends of the floor, supports the floor and separates it from the ground, and can rotate upward to form a handrail when combined with a ladder.
It is installed on both sides of the floor and includes handrails to prevent workers from falling,
The bottom part,
A plurality of main frames formed to have length on both sides;
One or more connection frames connecting the main frames and
It includes a footrest located between the main frames,
The footrest part,
One or more pivoting scaffolds rotatably coupled to one side of the main frame;
One or more fixed scaffolds fixedly coupled to the main frame and
It is formed on the longitudinal center side and includes a ladder coupling hole through which the ladder to be coupled can pass,
A wooden ladder that can be used as a workbench in combination with a ladder, characterized in that when combined with the ladder, the worker opens the rotating step upward and can move to the upper side of the floor through the ladder coupled below.
According to paragraph 1,
The legs,
A plurality of vertical legs, one end of which is rotatably coupled to the main frame and fixed in combination with the handrail when rotated upward to the floor, and
A wooden ladder that can be used as a workbench in combination with a ladder including horizontal legs connecting the vertical legs installed on the same pivot axis.
According to clause 5,
The vertical leg is,
The outer limbs that make up the outer layer and
Including an inner leg capable of sliding within the outer leg,
The inner leg,
The horizontal leg includes one or more fixing holes formed on a fixed side,
The horizontal leg is,
A fixing pin inserted into the fixing hole to secure the inner leg and
A wooden ladder that can be used as a workbench by combining with a ladder that includes a fixing pin groove that allows the fixing pin to be inserted and moved.
In paragraph 5
The handrail,
A horizontal railing installed horizontally with the floor at the top and capable of being coupled to the vertical legs at both ends, and
It includes a plurality of vertical railings, both ends of which are rotatably coupled to the horizontal railing and the main frame,
The vertical railing is,
Includes one or more vertical railing joints so that they can be folded and stacked,
A wooden ladder that can be used as a workbench in combination with a ladder, characterized in that the vertical railing folded by the vertical railing joint is stored in the upper storage space in a state in which the vertical railing is rotated and stored in the horizontal railing.
In clause 7,
Further comprising an auxiliary fixing part stored in the lower storage space and fixing the leg part,
The auxiliary fixing part is,
A wooden ladder that can be used as a workbench in combination with a ladder, characterized in that it can be separated from the lower storage space and the leg portion and coupled between the vertical railings.
According to paragraph 1,
It further includes one or more external fixing bars connecting and fixing the outer bar of the ladder and the main frame,
The ladder is,
A wooden ladder that can be used as a workbench by combining with a ladder including an external fixing bar coupling groove that allows the external fixing bar to be fixed at a predetermined angle.