EP4678848A1

EP4678848A1 - Foldable scaffold

Info

Publication number: EP4678848A1
Application number: EP24767295.9A
Authority: EP
Inventors: Jong Min Kim; Young Jo CHEON; Dong Ju Lee; Bong Gook KANG; Kyu Jin Cho; Sun Pil Jeong; Se Hyeok AHN
Original assignee: Hd Hyundai Samho Co Ltd; Seoul National University R&DB Foundation; HD Korea Shipbuilding and Offshore Engineering Co Ltd; HD Hyundai Heavy Industries Co Ltd
Current assignee: Hd Hyundai Samho Co Ltd; SNU R&DB Foundation; HD Korea Shipbuilding and Offshore Engineering Co Ltd; HD Hyundai Heavy Industries Co Ltd
Priority date: 2023-03-09
Filing date: 2024-02-06
Publication date: 2026-01-14
Also published as: CN120677291A; WO2024186006A1; KR102766730B1; JP2026507098A; KR20240137957A

Abstract

Disclosed is a foldable scaffold. The foldable scaffold according to an embodiment of the present invention comprises: a support frame supporting an object; and pillar frames located under the support frame and connected rotatably to the support frame, wherein the pillar frames each comprise a plurality of divided frames which are sequentially connected from the support frame. The plurality of divided frames are rotatably connected to one another, the height directions of the plurality of divided frames face the ground in a first state, and are parallel to the ground in a second state in which the plurality of divided frames are rotated from the first state.

Description

TECHNICAL FIELD

The present invention relates to a foldable scaffold, and more particularly, to a foldable scaffold that is converted into a folded state and an unfolded state.

BACKGROUND ART

A scaffold is a device that supports a load of a worker, a workpiece, or a work tool. When a work area is disposed above a certain height from the ground, a worker may use a scaffold to access the work area and perform work.
The scaffold may be used in a variety of industries. For example, the scaffold may be used when working on objects that have high heights with respect to the ground, such as buildings, vehicles, ships, and structures.
The scaffold may include a support frame that supports an object, such as a worker, a workpiece, or a work tool, at a position away from the ground, and may include a pillar frame for supporting the support frame with respect to the ground, etc.
If a work position of a work target is high, the scaffold stored in a storage place may move to a work area and then be installed and used, and when the work is completed, the scaffold may be removed and stored again.
A scaffold in which a portion of a frame structure is folded to be converted into a folded state and an unfolded state is disclosed in KR 20-0358429 Y , which is a related document.
In the scaffold that is the related document, a support frame or a foothold for supporting an object is removed from the scaffold that is in the unfolded state, and a connection frame that connects a pair of pillar frames to each other is folded so that a gap between the pair of pillar frames becomes narrow.
However, even if the scaffold of the related document implements the folded state, the overall height of the scaffold may not decrease, and thus, there may be disadvantageous in moving and storing the scaffold having e a certain height or more, and the connection frame may protrude from the pillar frame to increase in space that is required for the storage.
Thus, development of the foldable scaffold that effectively reduces the overall height when folded for storage to improve handling, minimizes the space required for the storage to improve space utilization, and furthermore stably support the load of the object in spite of having the foldable structure is an important task in this technical field.

DISCLOSURE OF THE INVENTION

TECHNICAL PROBLEM

Embodiments of the present invention is to provide a foldable scaffold capable of stably supporting a load of an object.
In addition, embodiments of the present invention is to provide a foldable scaffold capable of effectively increasing or decreasing in size.
In addition, embodiments of the present invention is to provide a foldable scaffold of which a size is variable by efficiently folding or unfolding at least a portion of a frame.
In addition, embodiments of the present invention is to provide a foldable scaffold capable of effectively suppressing an increase in required area on the ground in folded and unfolded states.
In addition, embodiments of the present invention is to provide a foldable scaffold in which an unfolded state is efficiently maintained.
In addition, embodiments of the present invention is to provide a foldable scaffold capable of being conveniently folded or unfolded by a worker.
In addition, embodiments of the present invention is to provide a foldable scaffold capable of effectively reducing an overall height in a folded state.

TECHNICAL SOLUTION

A foldable scaffold according to an embodiment of the present invention includes: a support frame and a pillar frame, wherein the support frame is configured to support an object, and the pillar frame is disposed below the support frame and rotatably connected to the support frame.
The pillar frame includes a plurality of divided frames which are sequentially connected from the support frame, and the plurality of divided frames are rotatably connected to each other.
A longitudinal direction of each of the plurality of divided frames may face the ground in a first state, and the longitudinal direction of each of the plurality of divided frames may be parallel to the ground in a second state in which the plurality of divided frames rotate from the first state.
In the second state, the divided frames may be disposed without getting out of both ends of the support frame on the basis of the longitudinal direction of the support frame.
The pillar frame may further include a divided hinge shaft configured to rotatably connect a pair of adjacent divided frames of the plurality of divided frames to each other, and the plurality of divided frames may rotate so that the divided hinge shaft moves toward the support frame in the first state so as to be converted into the second state.
In the second state, a portion of the pillar frame may protrude further than the support frame in a direction that is transverse to the longitudinal direction of the support frame.
In the second direction, a portion of each of the plurality of divided frames may protrude further than the support frame in a direction that is transverse to the longitudinal direction of the support frame.
The plurality of divided frames may include a first divided frame and a second divided frame, wherein one end of the first divided frame may be rotatably connected to the support frame, and one end of the second divided frame may be rotatably connected to the other end of the first divided frame.
In a process of being converted from the first state to the second state, the other end of the first divided frame and the one end of the second divided frame may rotate to come closer to the support frame.
The support frame may include a plurality of support parts, wherein the plurality of support parts may include a main support part and a linage support part rotatably connected to the main support part to rotate by being interlocked with the pillar frame.
The support frame may include a support cross-section in which a plurality of sides are defined by the plurality of support parts, respectively, wherein any one of the plurality of sides of the support cross-section may be defined by the linkage support part.
In a process of being converted from the first state to the second state, the pillar frame may be deformed so that a height of the support cross-section is reduced.
In the process of being converted from the first state to the second state, the support cross-section may be deformed through a four bar link motion so that a pair of opposing sides of the plurality of sides come closer to each other while being parallel to each other.
The main support part and the linkage support part may extend along a first direction parallel to the ground, and the linkage support part may be connected to the main support part through a support hinge shaft extending along the first direction.
In the first state, the linkage support part may be disposed below the main support part, and in the second state, the linkage support part may be aligned in a direction parallel to the ground.
In a process of being converted from the first state to the second state, at least a portion of the pillar frame may protrude in the direction parallel to the ground with respect to the main support part together with the linkage support part.
The foldable scaffold may further include a linkage joint configured to rotatably connect the linkage support part to the pillar frame so that the linkage support part is interlocked with the pillar frame.
A joint shaft of the linkage joint may rotate axially together with the linkage support part. The pillar frame may be connected to the support frame through an upper hinge shaft, and a joint shaft of the linkage joint and the upper hinge shaft may extend in different directions.
The upper hinge shaft, the support hinge shaft, and the joint shaft may have different axial directions. The upper hinge shaft may extend in a second direction orthogonal to the first direction, and the joint shaft may extend obliquely with respect to the first direction.
The linkage support part may include a support inclination part extending obliquely with respect to the first direction, the pillar frame may include a pillar inclination part disposed to face the support inclination part and extending parallel to the support inclination part, and the linkage joint may be configured to rotatably connect the support inclination part to the pillar inclination part.
At least a portion of the pillar frame may be interlocked with the linkage support part through the linkage joint to rotate around the upper hinge shaft.
The pillar frame may include: a plurality of pillar parts; pillar cross-section of which a plurality of sides are defined by the plurality of pillar parts, respectively, wherein any one of the plurality of pillar parts, which defines one side of the pillar cross-section, may include the pillar inclination part.
In a process of being converted from the first state to the second state, the pillar cross-section may have a pair of sides facing each other are closer to each other through a four bar link motion in a parallel state.
The foldable scaffold may further include a bottom frame disposed below the pillar frame. The pillar frame may be rotatably connected to the support frame through an upper hinge shaft and rotatably connected to the bottom frame through a lower hinge shaft.
The plurality of divided frames may include: a first divided frame connected to the support frame through the upper hinge shaft; and a second divided frame connected to the first divided frame through the divided hinge shaft and connected to the bottom frame through the lower hinge shaft.
In a process of being converted from the first state to the second state, the divided hinge shaft may move closer to a center of the support frame.

ADVANTAGEOUS EFFECTS

The embodiments of the present invention may provide the foldable scaffold capable of stably supporting the load of the object.
In addition, the embodiments of the present invention may provide the foldable scaffold capable of effectively increasing or decreasing in size.
In addition, the embodiments of the present invention may provide the foldable scaffold of which the size is variable by efficiently folding or unfolding at least a portion of the frame.
In addition, the embodiments of the present invention may provide the foldable scaffold capable of effectively suppressing the increase in required area on the ground in the folded and unfolded states.
In addition, the embodiments of the present invention may provide the foldable scaffold in which the unfolded state is efficiently maintained.
In addition, the embodiments of the present invention may provide the foldable scaffold capable of being conveniently folded or unfolded by the worker.
In addition, the embodiments of the present invention may provide the foldable scaffold capable of effectively reducing the overall height in the folded state.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a foldable scaffold according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a process of folding the foldable scaffold of FIG. 1 from a first state to a second state.
FIG. 3 is a perspective view illustrating the second state in which the foldable scaffold of FIG. 1 is completely folded.
FIG. 4 is a front view illustrating the first state in which the foldable scaffold is completely unfolded according to an embodiment of the present invention.
FIG. 5 is a front view illustrating a process of folding the foldable scaffold of FIG. 4.
FIG. 6 is a front view illustrating the second state in which the foldable scaffold of FIG. 4 is completely folded.
FIG. 7 is a view illustrating a hinge part that rotatably connects frames according to an embodiment of the present invention.
FIG. 8 is a view illustrating a unfolded state of each of the frames connected through the hinge part according to an embodiment of the present invention.
FIG. 9 is a view illustrating a process of folding the frames of FIG. 8.
FIG. 10 is a view illustrating a support frame of the foldable scaffold according to an embodiment of the present invention.
FIG. 11 is a view illustrating a pillar frame of the foldable scaffold according to an embodiment of the present invention.
FIG. 12 is a perspective view of the support frame and the pillar frame, which are in the first state, according to an embodiment of the present invention.
FIG. 13 is a perspective view illustrating a process in which the pillar frame of FIG. 12 rotates from the first state to the second state.
FIG. 14 is a perspective view illustrating the second state in which the pillar frame of FIG. 12 completely rotates.
FIG. 15 is a conceptual view illustrating the first state of the pillar frame having an shaft connection line DR inclined with respect to a longitudinal direction according to an embodiment of the present invention.
FIG. 16 is a view illustrating a state in which a height of the support frame is maximized in the process, in which the pillar frame of FIG. 15 rotates from the first state to the second state.
FIG. 17 is a view illustrating a process in which the pillar frame of FIG. 16 rotates to the second state.
FIG. 18 is a view illustrating a state in which the pillar frame of FIG. 15 rotates into the second state.
FIG. 19 is a view illustrating a support inclination part and a pillar inclination part of the foldable scaffold according to an embodiment of the present invention.
FIG. 20 is a perspective view illustrating a linkage joint that is in the first state according to an embodiment of the present invention.
FIG. 21 is a perspective view illustrating a process in which the linkage joint of FIG. 20 is converted into the second state.
FIG. 22 is a perspective view illustrating a state in which the linkage joint of FIG. 20 is converted into the second state.
FIG. 23 is a view illustrating a first joint body and a second joint body of the linkage joint according to an embodiment of the present invention.

MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings in such a manner that the technical idea of the present disclosure may easily be carried out by a person with ordinary skill in the art to which the invention pertains.
The present invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, anything unnecessary for describing the present invention will be omitted for clarity, and also like reference numerals in the drawings denote like elements.
In this specification, duplicated descriptions of identical components are omitted.
In addition, in this specification, it will also be understood that when an element is referred to as being 'connected to' or 'coupled to' another element, it can be directly connected to the other element, or intervening elements may also be present. On the other hand, in this specification, when it is mentioned that a component is 'directly connected' to another component, it should be understood that there is no intervening elements.
In addition, in this specification, the terms used herein are only used to describe particular embodiments and are not intended to limit the present invention.
In addition, in this specification, the terms of a singular form may include plural forms unless referred to the contrary.
In addition, in this specification, it should be understood that terms such as 'include' or 'have' are only intended to designate the existence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification, and this does not exclude in advance the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.
In addition, in this specification, the term 'and/or' includes any of a plurality of stated items or a combination of a plurality of stated items. In this specification, 'A or B' may include 'A', 'B', or 'both A and B'.
FIG. 1 is a perspective view illustrating a foldable scaffold 1 according to an embodiment of the present invention, FIG. 2 is a perspective view illustrating a process of folding the foldable scaffold 1 of FIG. 1 from a first state to a second state, and FIG. 3 is a perspective view illustrating the second state in which the foldable scaffold 1 of FIG. 1 is completely folded.
The foldable scaffold 1 according to an embodiment of the present invention includes a support frame 100. The support frame 100 supports an object. Here, the supporting includes supporting through direct contact with the object as well as supporting of a load through indirect contact.
The object disposed on the support frame 100 may include a worker, a workpiece, or a work tool. The worker may be disposed on the support frame 100 disposed on the work area to perform work on a work target.
At least portion of the support frame 100 may be provided in a plate shape to stably support the object such as the worker. In addition, the support frame 100 may be provided with a support plate on a top surface thereof to support the object.
The support frame 100 may extend along one direction to define a length thereof, and a longitudinal direction D1 of the support frame 100 may be approximately parallel to the ground. However, if necessary, the longitudinal direction D1 or the top surface of the support frame 100 may be inclined at a predetermined angle with respect to the ground.
The foldable scaffold 1 according to an embodiment of the present invention includes a pillar frame 200. The pillar frame 200 may be disposed below the support frame 100 and may be rotatably connected to the support frame 100.
The pillar frame 200 may support the support frame 100 from the ground, etc. The pillar frame 200 may space the support frame 100 apart from the ground to allow the support frame 100 to be disposed at a predetermined height relative to the ground.
The pillar frame 200 may be disposed approximately below the support frame 100 and may be rotatably connected to the support frame 100. The pillar frame 200 and the support frame 100 may be connected through a hinge part 50.
Unless otherwise specifically mentioned, a plurality of objects that are rotatably connected in the present invention may be connected through the hinge part 50. The hinge part 50 may include a hinge shaft from a physical configuration perspective and/or a conceptual perspective for rotational motion.
When the present invention describes that a plurality of components are connected through the hinge shaft, it may be understood that the plurality of components are connected to be rotatably connected through the hinge part 50 including the hinge shaft.
In an embodiment of the present invention, the pillar frame 200 may be provided to be rotatable relative to the support frame 100, and a height H of the support frame 100 that is relative to the ground may be changed according to the rotation of the pillar frame 200.
The pillar frame 200 may be a means that supports the load of the support frame 100 and/or the object on the support frame 100 from the ground or another structure disposed below the pillar frame 200.
The pillar frame 200 may include a plurality of divided frames that are sequentially connected from the support frame 100. For example, the pillar frame 200 may be provided as the plurality of divided frames, and thus, one of the divided frames may be connected to the support frame 100, and another of the divided frames may be connected to the one divided frame so that the plurality of divided frames have a sequential connection relationship.
The plurality of divided frames may be connected to each other so as to be rotatable. For example, the plurality of divided frames may include a first divided frame 201 and a second divided frame 202, and thus, the first divided frame 201 may be rotatably connected to the support frame 100, and the second divided frame 202 may be rotatably connected to the first divided frame 201. The height H of the support frame 100 may be changed depending on rotational states of the plurality of divided frames.
In an embodiment of the present invention, the foldable scaffold 1 may have a first state and a second state. The first state may correspond to an unfolded state in which the foldable scaffold 1 is designed to stably support the object, and the second state may correspond to a folded state in which a space required by the foldable scaffold 1 is designed to be minimized for ease of handling or storage efficiency.
In the first state, each longitudinal direction D2 of the plurality of divided frames may be directed toward the ground, and in the second state in which the plurality of divided frames rotate from the first state, each longitudinal direction D2 of the plurality of divided frames may be parallel to the ground.
Thus, the height H of the support frame 100 in the first state may be higher than that in the first state, and the height H of the support frame 100 in the second state may be minimized. In addition, since an embodiment of the present invention includes the plurality of rotatable divided frames in the pillar frame 200, the space occupied by the pillar frame 200 in the direction parallel to the ground in the second state may be reduced, and thus, there may be advantageous in implementing the folded state of the pillar frame 200.
For example, the plurality of pillar frames 200 may be provided to stably support the support frame 100, and in the relationship between the length of the support frame 100 and the length of the pillar frame 200, when the length of the pillar frame 200 is greater than a certain level, contact, i.e. interference may occur between the plurality of pillar frames 200 in the process of rotating the plurality of pillar frames 200 to reach the second state.
In addition, to eliminate the interference between the pillar frames 200 as described above, when at least a portion of the pillar frames 200 may rotate away from the support frame 100, an area consumed by the scaffold 1 relative to the ground by the pillar frames 200 in the second state may increase to deteriorate the storage efficiency.
However, in an embodiment of the present invention, since the pillar frame 200 includes the plurality of mutually rotatable divided frames, the pillar frame 200 may have a stacked shape of the divided frames so that the length of the pillar frame 200 is divided in a second state, in which the pillar frame 200 rotates parallel to the ground, to effectively suppress due to the interference due to the pillar frame 200 or the increase in area.
The pillar frame 200 may include the first divided frame 201 and the second divided frame 202, which are described above. The first divided frame 201 may be connected to the support frame 100 through an upper hinge shaft 251. The second divided frame 202 may be connected to the first divided frame 201 through a divided hinge shaft 252 extending parallel to the upper hinge shaft 251.
FIG. 7 is a view illustrating the hinge part 50 that rotatably connects components in the foldable scaffold 1 according to an embodiment of the present invention. The hinge part 50 may include a hinge bracket 52 that is coupled and fixed to the frame.
The hinge bracket 52 may be connected to the frame in various manners, such as by a joint method, a bolting method, or a hooking method, and may be connected and fixed to a beam included in one frame.
The hinge part 50 may be defined to include at least one pair of hinge brackets 52, and may include a hinge connection member 55 that rotatably connects the pair of hinge brackets 52. The hinge connection member 55 may be made of a flexible material that is variable in length, i.e., id bendable.
The hinge connection member 55 may be bent to be variable in length direction while its length is fixed. For example, the hinge connection member 55 may be made of a steel fiber material, a carbon fiber material, etc., that have excellent tensile strength and ensure flexibility.
The hinge part 50 may further include a hinge cover 57 to protect the hinge connection member 55 connected to the hinge bracket 52 from the outside and maintain the connection state. The hinge cover 57 may be connected to the hinge bracket 52 to cover a portion of the hinge connection member 55, which is disposed on the hinge bracket 52.
FIGS. 8 and 9 illustrate a state in which a pair of beams or frames connected through the hinge part 50 rotate relative to each other. FIG. 8 illustrates an unfolded state in which the pair of frames rotate away from each other, and FIG. 9 illustrates a folded state in which the pair of frames rotate toward each other or a state during the folding process.
In the hinge part 50, the pair of hinge brackets 52 may be coupled and fixed to different frames and may be disposed adjacent to or facing each other. The hinge brackets 52 connected through the hinge connection member 55 may rotate with respect to each other.
The hinge shaft of the hinge part 50 may be specified by structural analysis of the hinge bracket 52 connected by the hinge connection member 55. For example, in an embodiment of the present invention, the hinge shaft may extend transversely or orthogonally to an alignment direction of the pair of hinge brackets 52.
However, in the present invention, the structure of the hinge part 50 for the rotational connection between the frames may not necessarily have to be limited as described above, and various structures of hinge parts 50 that are capable of rotatably connecting the plurality of frames to each other may be applied.
FIGS. 4 to 6 illustrate a front view of the foldable scaffold 1 that is converted from the first state to the second state. FIG. 4 illustrates the scaffold 1 in the first state designed to stably support an object, FIG. 5 illustrates the scaffold 1 in the first state in which the pillar frame 200 rotates to be converted to the second state, and FIG. 6 illustrates the scaffold 1 in the second state having a minimum volume designed for storage, etc.
As described above, the first divided frame 201 may be connected to the support frame 100 through an upper hinge shaft 251. The upper hinge shaft 251 may be understood as an object that rotatably connects the pillar frame 200 to the support frame 100.
One end of the first divided frame 201 may be connected to the support frame 100 through the upper hinge shaft 251, and the other end may be connected to the second divided frame 202 through the divided hinge shaft 252. That is, the second divided frame 202 may be connected to the first divided frame 201 through the divided hinge shaft 252.
The first divided frame 201 and the second divided frame 202 may rotate so that the longitudinal direction D2 faces the ground in the first state and is parallel to the ground in the second state.
In the first state, both the first divided frame 201 and the second divided frame 202 may have their longitudinal directions D2 directed toward the ground or perpendicular to the ground. Thus, a length of the pillar frame 200 may be understood as the sum of lengths of the first divided frame 201 and the second divided frame 202.
The first divided frame 201 and the second divided frame 202 may be aligned so that their longitudinal directions D2 are parallel to each other in the first state. Each of the first divided frame 201 and the second divided frame 202 may include a plurality of pillar parts and a pillar cross-section 230.
In an embodiment of the present invention, one frame may include at least one part, and one part may include at least one beam. Detailed descriptions of the plurality of pillar parts and the pillar cross section 230 will be provided later.
In the second state, the divided frame may be disposed so as not to get out of both the ends of the support frame 100 based on the longitudinal direction D1 of the support frame 100. FIG. 6 illustrates the pillar frame 200 that is folded between both the ends of the support frame 100, i.e., the plurality of divided frames.
Specifically, in an embodiment of the present invention, the pillar frame 200 may rotate so that the plurality of divided frames do not get out of both the ends of the support frame 100 in the longitudinal direction D1 during the process of being converted from the first state to the second state.
For example, in an embodiment of the present invention, the plurality of pillar frames 200 may be provided and may be disposed on a circumference of the support frame 100. The pillar frame 200 may be disposed at each of both the ends of the support frame 100 based on the longitudinal direction D1 of the support frame 100.
In the process of being converted from the first state to the second state, the first divided frame 201 having one end connected to the support frame 100 through the upper hinge shaft 251 may rotate so that the other end faces a center of the support frame 100.
The second divided frame 202 of which one end is connected to the first divided frame 201 through the divided hinge shaft 252 may rotate so that the other end moves away from the center of the support frame 100. Thus, the pillar frame 200 may rotate so that the divided hinge shaft 252 moves toward the support frame 100 during the process of being converted from the first state to the second state.
In an embodiment of the present invention, the pillar frame 200 may be connected so that the pair of adjacent divided frames of the plurality of divided frames rotate through the divided hinge shaft 252, and the plurality of divided frames may rotate so that the divided hinge shaft 252 rotates to move toward the support frame 100 and then rotate to be converted from the first state to the second state.
In the process of being converted from the first state to the second state, the divided hinge shaft 252 may move closer to the center of the support frame 100.
One end of the first divided frame 201 may be rotatably connected to the support frame 100, and one end of the second divided frame 202 may be rotatably connected to the other end of the first divided frame 201, and thus, in the process of being converted from the first state to the second state, the other end of the first divided frame 201 and the one end of the second divided frame 202 may rotate closer to the support frame 100.
The lengths of the first divided frame 201 and the second divided frame 202 may be approximately the same. In addition, the length of the first divided frame 201 may be greater than the length of the second divided frame 202. Thus, the second divided frame 202 extending from the other end of the first divided frame 201 may not extend to get out of both the ends of the support frame 100 in the second state.
In an embodiment of the present invention, the pillar frame 200 may be converted from the first state to the second state to minimize a height of the support frame 100, and in the second state, the pillar frame 200 or the plurality of divided frames may be folded so as not to get out of both the ends of the support frame 100, that is, so as not to increase in required area on the ground based on the longitudinal direction D1 of the support frame 100, and thus, no additional storage space is required based on the longitudinal direction D1 of the support frame 100 in the process of converting the scaffold 1 from the first state to the second state, which is advantageous.
The divided frames, which rotate in the longitudinal direction D2 parallel to the ground and are converted into the second state, may be stacked under the support frame 100. A design minimum height H3 of the support frame 100 may be implemented by rotating the divided frames of the pillar frame 200 for supporting the support frame 100 in parallel to the ground.
The foldable scaffold 1 according to an embodiment of the present invention may include a bottom frame 300. The bottom frame 300 may be disposed below the pillar frame 200. The bottom frame 300 may be disposed on the ground or on another structure disposed on the ground.
The bottom frame 300 may be understood as the final configuration to which the load is transmitted in the foldable scaffold 1 according to an embodiment of the present invention. The load of the object may be transmitted to the bottom frame 300 through the support frame 100 and the pillar frame 200. The bottom frame 300 may be supported by the ground or a structure on the ground.
The above pillar frame 200 may be rotatably connected to the support frame 100 through the upper hinge shaft 251 and rotatably connected to the bottom frame 300 through a lower hinge shaft 253.
The plurality of divided frames may include a first divided frame 201 connected to the support frame 100 through the upper hinge shaft 251, and a second divided frame 202 connected to the first divided frame 201 through the divided hinge shaft 252 and connected to the bottom frame 300 through the lower hinge shaft 253. The second divided frame 202 may be rotatably connected to the bottom frame 300 through the lower hinge shaft 253.
The foldable scaffold 1 according to an embodiment of the present invention may have upper and lower portions that are symmetrical. For example, the scaffold 1 may have a structure that is symmetrical vertically around the divided hinge shaft 252 provided between the first divided frame 201 and the second divided frame 202 in the pillar frame 200.
The support frame 100 and the bottom frame 300 may have approximately the same structure, and may be inverted upside down around the divided hinge shaft 252. That is, the bottom frame 300 may be in the form of the support frame 100, which is turned over and then disposed on the ground. All the pair of pillar frames 200 disposed at both ends of the support frame 100 may be rotatably connected to the bottom frame 300.
The connection structure of the first divided frame 201 and the support frame 100 may be the same as the connection structure of the second divided frame 202 and the bottom frame 300. The upper hinge shaft 251 described above may correspond to the lower hinge shaft 253. Thus, the folding structure implemented by the first divided frame 201 and the support frame 100 may be the same as the folding structure implemented by the second divided frame 202 and the bottom frame 300.
In addition, the foldable scaffold 1 according to an embodiment of the present invention may have one side and the other side, which are symmetrical with respect to the longitudinal direction D1 of the support frame 100. For example, the foldable scaffold 1 may have a structure that is symmetrical left and right based on a virtual line that passes through the center of the support frame 100 and is perpendicular to the ground.
The plurality of pillar frames 200 may have the same structure and may be inverted left and right based on the virtual line passing through the center of the support frame 100.
The connection structure of one of the plurality of pillar frames 200 to the support frame 100 and a body frame may be the same as the connection structure of another of the plurality of pillar frames 200. Thus, the folding structure implemented by one pillar frame 200 may be the same as the folding structure implemented by another pillar frame 200.
In the first state, the longitudinal direction D2 of the pillar frame 200 may be approximately perpendicular to the ground, and the pillar frame 200 may support the support frame 100 relative to the bottom frame 300 between the bottom frame 300 and the support frame 100.
The pillar frame 200 may be defined as the pillar cross-section 230 parallel to the ground and may be connected to the support frame 100 and the bottom frame 300 in a surface unit to provide a stable support structure.
In the second state in which the first divided frame 201 rotates relative to the support frame 100, and the second divided frame 202 rotates relative to the bottom frame 300 from the first state, the longitudinal direction D2 of the first divided frame 201 and the second divided frame 202 may be parallel to the ground, parallel to the longitudinal direction D1 of the support frame 100, and parallel to the longitudinal direction of the bottom frame 300.
In the process of being converted from the first state to the second state, the height H of the support frame 100 may be lowered, and the height in the second state may be a minimum height H3 allowed by the design. In the second state, the plurality of divided frames may be accommodated between the support frame 100 and the bottom frame 300, and a distance between the plurality of divided hinge shafts 252 respectively provided in the plurality of pillar frames 200 may be minimized.
The support frame 100 may include a space forming part 140 extending toward the ground. The support frame 100 may include a main support part 111 that defines a top surface on which the object is disposed, and the space forming part 140 may extend downward from the main support part 111.
The bottom frame 300 may include the space forming part 140 to correspond to the support frame 100. In this case, the space forming part 140 of the support frame 100 and the bottom frame 300 may be disposed perpendicular to the ground.
Thus, in the second state, the space forming part 140 of the support frame 100 may be disposed on the space forming part 140 of the bottom frame 300 to secure the minimum height H3 so as to be accommodated in the pillar frame 200 between the support frame 100 and the bottom frame 300.
That is, in an embodiment of the present invention, the accommodation space for accommodating the divided frames of the rotating pillar frame 200 between the support frame 100 and the bottom frame 300 may be secured, and the folded state having the minimized height may be stably implemented. A detailed description of the structure of the support frame 100 related to the space forming part 140 will be described later.
In an embodiment of the present invention, the first divided frame 201 may be provided so that a shaft connection line DR connecting the upper hinge shaft 251 to the divided hinge shaft 252 is inclined in the longitudinal direction D2 of the first divided frame 201.
Thus, the foldable scaffold 1 according to an embodiment of the present invention may have an increasing section in which the height H of the support frame 100 increases during the process of being converted from the first state to the second state.
For an explanation of the increasing section, reference may be made to FIGS. 15 to 18. FIGS. 15 to 18 illustrate the frame structure that is a simplified in the folding scaffold 1 according to an embodiment of the present invention. In the frame structure, the pillar frame 200 is expressed as a single undivided frame or beam.
FIGS. 15 to 18 illustrate a process in which the frame structure corresponding to the foldable scaffold 1 according to an embodiment of the present invention is converted from the first state to the second state.
Referring first to FIG. 15, in the frame structure, the pillar frame 200 may be connected to the support frame 100 through the upper hinge shaft 251 and connected to the bottom frame 300 through the lower hinge shaft 253. In the first state, the longitudinal direction D2 of the pillar frame 200 may be approximately perpendicular to the ground.
The pillar frame 200 may support a load by being in surface-unit contact with the support frame 100 and the bottom frame 300, thereby implementing the stable support structure. In the first state, the longitudinal direction D1 of the support frame 100 and the bottom frame 300 may be approximately parallel to the ground.
The upper hinge shaft 251 of the pillar frame 200 may be disposed so as to be deviated from the virtual line extending vertically from the ground from the lower hinge shaft 253. Thus, the virtual shaft connection lines DR extending perpendicularly to the upper hinge shaft 251 and the lower hinge shaft 253 may be defined to be inclined with respect to the longitudinal direction D2 of the pillar frame 200.
The frame structure illustrated in FIG. 15 corresponds to the first state in which the structure is unfolded to support the object, and the height H of the support frame 100 corresponding to the height H1 in the first state is indicated in the drawing.
FIG. 16 illustrates a state in which the pillar frame 200 in the frame structure of FIG. 15 rotates so that the support frame 100 reaches the maximum height H2 allowed by the design.
Specifically, in an embodiment of the present invention, the pillar frame 200 may rotate from the first state to the second state, and the rotation process from the first state to the second state may include an increasing section and a decreasing section.
The increasing section may be defined as a section in which the height H of the support frame 100 increases as the pillar frame 200 rotates. The increasing section may be defined as a rotation section from the first state to the state in which the shaft connection line DR of the pillar frame 200 is perpendicular to the ground.
The shaft connection line DR may rotate around the upper hinge shaft 251 or the lower hinge shaft 253 during the rotation of the pillar frame 200. The upper hinge shaft 251 and the lower hinge shaft 253 may correspond to contact points of each of the pillar frame 200, the support frame 100, and the bottom frame 300.
In the first state for supporting the object, such as the first state, a distance between the support frame 100 and the bottom frame 300 may correspond to the length of the pillar frame 200, but as the pillar frame 200 rotates from the first state, the shaft connection line DR corresponding to the connection line between the support frame 100 and the bottom frame 300 may gradually rotate perpendicular to the ground.
As described above, in the first state, the shaft connection line DR may extend obliquely to the ground, and the longitudinal direction D2 of the pillar frame 200 may be perpendicular to the ground, and thus, the length of the shaft connection line DR may be longer than the length of the pillar frame 200.
In the first state, the upper end of the pillar frame 200 and the upper end of the shaft connection line DR may be disposed at the same height, and thus, the distance between the bottom frame 300 and the support frame 100, that is, the height of the support frame 100, may be understood to correspond to the length of the pillar frame 200. However, when the pillar frame 200 begins to rotate in the first state, the shaft connection line DR, which is defined to be longer than the length of the pillar frame 200, may gradually rotate perpendicular to the ground, and thus, the height of the support frame 100 may be changed to correspond to the height of the upper end of the shaft connection line DR.
Thus, in the increasing section in which the pillar frame 200 rotates from the first state and the shaft connection line DR so as to be perpendicular to the ground, a phenomenon in which the height H of the support frame 100 gradually increases may occur.
In an appearance of an end point of the increasing section illustrated in FIG. 16, the distance between the bottom frame 300 and the support frame 100 may correspond to the length of the shaft connecting line DR. The height H of the support frame 100 may be higher than the height H1 in the first state. The height of the support frame 100 may be the maximum height H2 allowed by the design.
In order to increase in height H of the support frame 100 by the length of the shaft connection line DR in the increasing section, based on the rotation process converted from the first state to the second state, the shaft connection line DR may be inclined in an opposite direction of the rotational direction with respect to the longitudinal direction D2 of the pillar frame 200 from the lower hinge shaft 253.
In addition, when the support frame 100 extends in a first direction X, and the support frame 100 moves along the first direction X so that its height is lowered during the process of being converted from the first state to the second state, the upper hinge shaft 251 may be disposed closer to the center of the support frame 100 than the lower hinge shaft 253 with respect to the first direction X.
In an embodiment of the present invention, rotational resistance of the pillar frame 200 to a transverse pressure increases by the increasing section that progresses from the first state to improve structural maintenance performance.
For example, the support frame 100 may undergo the increasing section in which the height H increases during the process of being converted from the first state to the second state, and thus, the load of the object disposed on the support frame 100 may act as resistance force, i.e., structural maintenance force against the pillar frame 200 rotating to the second state.
Thus, while a work is being performed on the support frame 100 in the first state, even if an unintended lateral load occurs, the load of the object may act as resistance to the rotation, and thus, accidents such as the frame structure unintentionally converted to the second state may be effectively prevented.
In addition, even if a separate stopper or fixing structure for maintaining the pillar frame 200 or the like in the first state is not provided, the first state may be maintained, and thus, addition of unnecessary components may be omitted.
FIG. 17 illustrates the frame structure being converted from the end point of the increasing section illustrated in FIG. 16 to the second state.
The rotation of the pillar frame 200 passing through the end point of the increasing section may gradually decrease without increasing in height of the upper end of the shaft connection line DR, i.e., the upper hinge shaft 251. In this process, the load of the support frame 100, etc., may act as rotational force of the pillar frame 200 to induce the conversion to the second state.
FIG. 18 illustrates a frame structure in which the pillar frame 200 completely rotates from the first state to the second state.
In the second state, the longitudinal directions of the bottom frame 300, the pillar frame 200, and the support frame 100 may be parallel to each other, and also, each of the longitudinal directions may be parallel to the ground. That is, the height H of the second state of the support frame 100 may be the minimum height H3 allowed by the design.
The frame structures illustrated in FIGS. 15 to 18 may correspond to a single frame type in which the pillar frame 200 does not include the divided frame, but the characteristics of the increasing and decreasing sections described above may be equally applied to an embodiment of the present invention that includes the divided frame.
For example, in the foldable scaffold 1 according to an embodiment of the present invention, the shaft connection line DR of each divided frame may be provided to be inclined with respect to each longitudinal direction D2, and the shaft connection line DR defined in the divided frame is illustrated in FIGS. 4 to 6.
Referring again to FIGS. 4 to 6, the first divided frame 201 may have the shaft connection line DR connecting the upper hinge shaft 251 to the divided hinge shaft 252, and the shaft connection line DR of the first divided frame 201 may extend obliquely with respect to the longitudinal direction D2 of the first divided frame 201.
The second divided frame 202 may have the shaft connection line DR connecting the divided hinge shaft 252 to the lower hinge shaft 253, and the shaft connection line DR of the second divided frame 202 may extend obliquely with respect to the longitudinal direction D2 of the second divided frame 202.
Thus, in the aforementioned increasing section, the first divided frame 201 may rotate relative to the second divided frame 202, and the shaft connection line DR may gradually rotate perpendicular to the ground, and also, the second divided frame 202 may rotate relative to the bottom frame 300, and the shaft connection line DR may gradually rotate perpendicular to the ground.
At the end point of the increasing section, the shaft connection line DR of the first divided frame 201 and the shaft connection line DR of the second divided frame 202 may be disposed on the same line perpendicular to the ground, and in this state, the distance between the bottom frame 300 and the support frame 100, i.e., the height H of the support frame 100, may be the maximum height H2 intended by the design.
After the end point of the increasing section, the rotation of the first divided frame 201 and the second divided frame 202 may increase in angle of inclination with respect to the respective shaft connection line DR and the ground to reduce the height H of the support frame 100, and in the second state, the height H of the support frame 100 may become the minimum height H3 intended by the design.
The support frame 100 may extend in the first direction X parallel to the ground, and the upper hinge shaft 251 may be disposed closer to the center of the support frame 100 than the divided hinge shaft 252 based on the first direction X.
However, as described later, in an embodiment of the present invention, during the conversion from the first state to the second state, a support cross-section 130 and a pillar cross-section 230 may undergo deformation that continuously reduces an area as soon as the rotation of the pillar frame 200 begins.
Since the height of the support cross-section 130 and the pillar cross-section 230 itself decreases, the effect of decreasing in height H of the support frame 100 may also occur in the increasing section. However, due to relative sizes of lengths of a support linkage part and a pillar linkage part and the length of the shaft connection line DR, which will be described later, an amount of increase in the height of the support frame 100 due to the rotation of the shaft connection line DR may be greater than an amount of decrease in the height of the support frame 100 due to the rotation of the support linkage part and the pillar linkage part, and thus, the phenomenon of increasing in height of the support frame 100 in the increasing section may occur in the same manner.
FIG. 10 illustrates the support frame 100 of the foldable scaffold 1 according to an embodiment of the present invention.
In an embodiment of the present invention, the support frame 100 may include a plurality of support parts. As described above, in an embodiment of the present invention, the frame may include at least one part, and the part may include at least one beam.
The plurality of support parts may be rotatably connected through different support hinge shafts 120. The plurality of support parts may provide a connection relationship through the plurality of support hinge shafts 120.
Thus, in an embodiment of the present invention, the plurality of parts provided in one frame may be divided based on the hinge part 50. That is, the division between the plurality of parts may also be defined by whether the plurality of parts have the rotatable connection relationship with each other.
Each of the plurality of support parts may extend along the first direction X parallel to the ground. That is, the plurality of support parts may extend parallel to each other.
The plurality of support parts may include a main support part 111 and a linkage support part 112 that is rotatably connected to the main support part 111 to rotate by being interlocked with the pillar frame 200.
The main support part 111 may be a rotation reference for the linkage support part 112, and the main support part 111 may be a part that does not have rotational displacement during the conversion process from the first state to the second state.
The main support part 111 may define the top surfaces of the support frame 100 and the foldable scaffold 1 and may define a surface for supporting the object. FIG. 10 illustrates the main support part 111, in which four beams have a rectangular cross-sectional shape, but the cross-sectional shape of the main support part 111 and the number of beams may vary.
The linkage support part 112 may be rotatably connected to the main support part 111. The linkage support part 112 may be connected to the main support part 111 through the support hinge shaft 120. The extension direction of the support hinge shaft 120 may vary. For example, the support hinge shaft 120 may extend in the first direction X together with the main support part 111 and the linkage support part 112.
The linkage support part 112 may form the rotational displacement by being interlocked with the pillar frame 200. For example, in the process of converting the pillar frame 200 into the first state and the second state, the linkage support part 112 may rotate around the support hinge shaft 120 by being interlocked with the rotation of the first divided frame 201 around the upper hinge shaft 251.
The linkage support part 112 may be interlocked with the pillar frame 200 in various manners. For example, the linkage support part 112 may rotate through physical interference with the pillar frame 200 or through an linkage joint 400 described later.
In an embodiment of the present invention, the support frame 100 may include at least one linkage support part 112, and when the plurality of linkage support parts 112 are provided, at least one of the plurality of linkage support parts 112 may include a support inclination part 115 coupled to the linkage joint 400. Detailed descriptions of the support inclination part 115 and the linkage joint 400 will be described later.
The worker may induce the conversion of the foldable scaffold 1 according to an embodiment of the present invention through the linkage support part 112.
Specifically, as described above, in an embodiment of the present invention, during the process in which the pillar frame 200 rotates from the first state to the second state, an increase in height H of the support frame 100 may occur in some sections.
In the rotation section in which the height H of the support frame 100 increases, the load of the object disposed on the support frame 100 and/or the support frame 100 itself may act as resistance to the increase in height of the support frame 100 or the rotation of the pillar frame 200.
That is, in an embodiment of the present invention, intervention of external force may be required to offset the action of the load of the object and the support frame 100 during the process of being converted from the first state to the second state.
Here, the worker may perform the conversion process from the first state to the second state by directly lifting the support frame 100, providing the rotational force to the pillar frame 200, or providing the rotational force to the linkage support part 112 that rotates together with the pillar frame 200.
In an embodiment of the present invention, the worker may conveniently proceed with the increasing section having the height H existing during the conversion process from the first state to the second state by holding and rotating the linkage support part 112 provided on the support frame 100.
The linkage support part 112 may be provided on both sides of the support part so as to be rotatable with respect to the second direction Y, and the plurality of support parts may include an inner support part 113 that faces the main support part 111 and is rotatably connected to the linkage support part 112.
The main support part 111 and the linkage support part 112 may extend along the first direction X parallel to the ground, and the linkage support part 112 may be connected to the main support part 111 through the support hinge shaft 120 extending along the first direction X.
Specifically, the plurality of support parts included in the support frame 100, i.e., the main support part 111, the linkage support part 112, and the inner support part 113, may extend together in a first direction X parallel to the ground.
The extension direction of the plurality of support parts may be parallel to the first direction X, even not only in the first state but also in the second state.
In the present invention, the second direction Y may be defined as a direction parallel to the ground, but approximately orthogonal to the first direction X. That is, the first direction X and the second direction Y may be defined to be orthogonal to each other on a plane parallel to the ground.
The linkage support parts 112 may be provided in a pair and may be provided at each of both ends of the main support part 111 in the second direction Y. The pair of linkage support parts 112 may be rotatably connected to both the ends of the main support part 111 through different support hinge shafts 120.
The inner support part 113 may be disposed to face the main support part 111. The linkage support part 112 may have one end connected to the main support part 111 and the other end connected to the inner support part 113.
The inner support part 113 may be rotatably connected to the linkage support part 112. That is, the support frame 100 may include a plurality of support hinge shafts 120, and the inner support part 113 may be connected to the linkage support part 112 through any one of the plurality of support hinge shafts 120.
The support frame 100 may include a support cross-section 130 in which the plurality of sides are defined by the plurality of support parts, respectively. The support cross-section 130 may include a plurality of sides, and the respective sides may be defined by different support parts.
For example, as illustrated in FIG. 10, the support cross-section 130 may be a single surface perpendicular to the ground, an upper side may be defined by the main support part 111, both sides may be defined by the pair of linkage support parts 112, and a lower side may be defined by the inner support part 113.
The space forming part 140 described above may be provided on both sides of the support frame 100 along the first direction X. The space forming part 140 may extend from both ends of the support frame 100 along the first direction X toward the bottom frame 300.
Due to the space forming part 140 provided in the main support part 111, a space may be secured for accommodating the first divided frame 201 together with the linkage support part 112 and the inner support part 113 in the second state based on the direction Z perpendicular to the ground.
FIG. 11 illustrates the pillar frame 200 of the foldable scaffold 1 according to an embodiment of the present invention. In FIG. 11, the first divided frame 201 of the pillar frames 200 is illustrated, but the structure of the second divided frame 202 is no different.
In an embodiment of the present invention, the pillar frame 200 may include a plurality of pillar parts. When the pillar frame 200 includes the first divided frame 201 and the second divided frame 202, each of the first divided frame 201 and the second divided frame 202 may include the plurality of pillar parts.
The plurality of pillar parts may be rotatably connected through different pillar hinge shafts 220. The plurality of pillar parts may provide a mutually rotatable connection relationship through the plurality of pillar hinge shafts 220.
Each of the plurality of pillar parts may extend in a direction perpendicular to the ground Z in the first state and may extend along the first direction X in the second state. That is, the plurality of pillar parts may extend parallel to each other, and the pillar frame 200 may rotate around the upper hinge shaft 251 so that the longitudinal direction of the plurality of pillar parts is parallel to the first direction X or perpendicular to the ground.
The plurality of pillar parts may include a main pillar part 211 and a linkage pillar part 212 that is rotatably connected to the main pillar part 211 to rotate by being interlocked with the linkage support part 112.
For example, the rotation of the pillar frame 200 centered on the upper hinge shaft 251, the rotation of the linkage pillar part 212 centered on the pillar hinge shaft 220, and the rotation of the linkage support part 112 centered on the support hinge shaft 120 may occur by being interlocked with each other.
The main pillar part 211 may serve as a rotation reference for the above-described linkage pillar part 212. The main pillar part 211 may define at least a portion of an outer surface of the pillar frame 200 and may be a portion of a path through which the loads of the object and the support frame 100 are transmitted.
FIG. 11 illustrates the main pillar part 211, in which four beams have a rectangular cross-sectional shape, but the cross-sectional shape of the main pillar part 211 and the number of beams may vary.
The linkage pillar part 212 may be rotatably connected to the main pillar part 211. The linkage pillar part 212 may be connected to the main pillar part 211 through the pillar hinge shaft 220. The extension direction of the pillar hinge shaft 220 may vary. For example, the pillar hinge shaft 220 may extend in a direction parallel to the main pillar part 211 and the linkage pillar part 212.
The linkage pillar part 212 may form a rotational displacement about the pillar hinge shaft 220 by being interlocked with the linkage support part 112. For example, in the process of converting the pillar frame 200 into the first state and the second state, the first divided frame 201 may rotate around the upper hinge shaft 251, the linkage support part 112 may rotate around the support hinge shaft 120 by being interlocked with the rotation of the first divided frame 201, and the linkage pillar part 212 may rotate around the pillar hinge shaft 220 by being interlocked with the rotation of the linkage support part 112.
The linkage pillar part 212 may be interlocked with the linkage support part 112 in various manners. For example, the linkage pillar part 212 may rotate through physical interference with the linkage support part 112 or through the linkage joint 400 described above. The linkage pillar part 212 may include a pillar inclination part 215 to which the linkage joint 400 is connected.
The linkage pillar part 212 may be provided in a pair and may be provided at both ends of the main pillar part 211 along the second direction Y, respectively. The pair of linkage pillar parts 212 may be rotatably connected to both the ends of the main pillar part 211 through different pillar hinge shafts 220.
The inner pillar part 213 may be disposed to face the main pillar part 211. The linkage pillar part 212 may have one end connected to the main pillar part 211 and the other end connected to the inner pillar part 213.
The inner pillar part 213 may be rotatably connected to the linkage pillar part 212. That is, the pillar frame 200 may include a plurality of pillar hinge shafts 220, and the inner pillar part 213 may be connected to the linkage pillar part 212 through any one of the plurality of pillar hinge shafts 220.
The pillar frame 200 or the first divided frame 201 or the second divided frame 202 may include a pillar cross-section 230 in which a plurality of sides are defined by the plurality of pillar parts, respectively. The pillar cross-section 230 may include a plurality of sides, and the respective sides may be defined by different pillar parts.
For example, as illustrated in FIG. 11, in the first state, the pillar cross-section 230 may be a surface parallel to the ground, and the respective sides may be defined by the main pillar part 211, the pair of linkage pillar parts 212, and the inner pillar part 213, respectively.
FIGS. 12 to 14 illustrate the first divided frame 201 of the support frame 100 and the pillar frame 200, which are converted from the first state to the second state while the shapes of the support cross-section 130 and the pillar cross-section 230 are transformed.
FIG. 12 illustrates a support frame 100 and a pillar frame 200 having a support cross-section 130 and a pillar cross-section 230 in approximately rectangular shapes in the first state, FIG. 13 illustrates a support frame 100 and a pillar frame 200 in which the pillar frame 200 rotates in the first state, and the support cross-section 130 and the pillar cross-section 230 are deformed into approximately parallelogram shapes, and FIG. 14 illustrates a support frame 100 and a pillar frame 200 in which the support cross-section 130 and the pillar cross-section 230 are deformed so that all sides extend in one direction in the second state.
As illustrated in FIGS. 12 to 14, in an embodiment of the present invention, the support frame 100 and the pillar frame 200 may rotate about the upper hinge shaft 251, and thus, the shapes of the support cross-section 130 and the pillar cross-section 230 may be deformed so that heights of the support cross-section 130 and the pillar cross-section 230 in the second state are minimized.
Specifically, in an embodiment of the present invention, the support frame 100 may include a plurality of support parts, and the plurality of support parts may include a main support part 111 and a linkage support part 112 rotatably connected to the main support part 111.
The linkage support part 112 may have one end connected to the main support part 111 through the support hinge shaft 120. The linkage support part 112 may rotate around the support hinge shaft 120 so that the other end is disposed below the support hinge shaft 120 in the first state, and the other end is disposed in the second direction Y with respect to the support hinge shaft 120 in the second state.
That is, the linkage support part 112 may be disposed downward with respect to the main support part 111 in the first state and may be disposed in a direction parallel to the ground with respect to the main support part 111 in the second state. One side defined by a plurality of beams provided in the linkage support part 112 may be perpendicular to the ground in the first state and parallel to the ground in the second state.
The linkage support part 112 may be disposed lower than the main support part 111 in the first state and may be aligned in a direction parallel to the ground with the linkage support part 112 in the second state.
In the second state, a portion of the pillar frame 200 may protrude further than the support frame 100 in a direction crossing the longitudinal direction D1 of the support frame 100. That is, the shape of the pillar cross-section 230 may be changed so that a portion of the pillar frame 200 protrudes further than the support frame 100 along the second direction Y.
That is, in the second state, each of the plurality of divided frames may protrude from the main support part 111 in a direction crossing the longitudinal direction D1 of the support frame 100.
In the process of being converted from the first state to the second state, at least a portion of the pillar frame 200 may protrude in a direction parallel to the ground together with the linkage support part 112 more than the main support part 111.
The linkage pillar part 212 may be disposed in the first direction X with respect to the main pillar part 211 in the first state and may be disposed in the second direction Y with respect to the main pillar part 211 in the second state.
In the second state, the linkage support part 112 may be disposed in a direction parallel to the ground with respect to the main support part 111, and the linkage pillar part 212 may be disposed in a direction parallel to the ground with respect to the main pillar part 211, and thus, the uppermost height of the support frame 100 with respect to the ground may be formed to be minimized.
The rotational relationship between the support parts and the pillar parts that change the shaped of the support cross-section 130 and the pillar cross-section 230 may be understood in the same manner as the folding and unfolding relationship of the frame structure of FIGS. 15 to 18 described above.
Specifically, in the frame structure illustrated in FIGS. 15 to 18, the upper frame may correspond to the main support part 111 or the main pillar part 211. Each of both the frames may correspond to the linkage support part 112 or the linkage pillar part 212. The lower frame may correspond to the inner support part 113 or the inner pillar part 213.
In the first state, the pair of linkage support parts 112 may extend approximately vertically with respect to the main support part 111 or the inner support part 113. In the process of being converted from the first state to the second state, the linkage support part 112 may rotate relative to the inner support part 113, and thus, the shape of the support cross-section 130 may be changed so that the cross-section having an approximately rectangular shape has a parallelogram shape.
In the process of changing the shape of the support cross-section 130, an area of the support cross-section 130 may be reduced by being interlocked with the pillar frame 200 during the process of being converted from the first state to the second state.
Any one of the plurality of sides of the support cross-section 130 may be defined by the linkage support part 112. That is, the support cross-section 130 may be deformed so that the height of the support cross-section 130 is reduced by the rotation of the linkage support part 112 by being interlocked with the rotation of the pillar frame 200.
The motion of the plurality of sides that rotate relative to each other in the support cross-section 130 may be a four bar link motion. In an embodiment of the present invention, the four bar link motion refers to a motion in which, when the lengths of sides facing each other are the same, and one side rotates with respect to the adjacent side, one pair of sides may rotate so that its longitudinal direction is changed, but the other pair of sides are not changed in its longitudinal direction, and a distance between the pair of sides decreases.
FIGS. 15 to 18 illustrate the process in which a rectangle having four sides decreases in height through the four bar link motion.
Thus, in the process of being converted from the first state to the second state, the support cross-section 130 may be deformed through the four bar link motion so that the pair of opposing sides of the plurality of sides come closer to each other while being parallel to each other.
The pair of sides rotating in the support cross-section 130 may correspond to the linkage support part 112, and the pair of sides that are constant in the longitudinal direction may correspond to the main support part 111 and the inner support part 113.
In relation to this, when the pair of linkage support parts 112 are provided as described above, the pair of linkage support parts 112 may have the same rotation direction as illustrated in FIGS. 15 to 18.
That is, one of the pair of linkage support parts 112 may be disposed to protrude in the second direction Y from the main support part 111 in the second state, and the other may be disposed above the main support part 111.
This deformation of the support cross-section 130 may be equally applied to the pillar cross-section 230. For example, the upper frame of the frame structure illustrated in FIGS. 15 to 18 may correspond to the inner pillar part 213, both the sides of the frame may correspond to the linkage pillar part 212, and the lower frame may correspond to the main pillar part 211.
Thus, the pillar cross-section 230 may be deformed so that its area is reduced, similar to the support cross-section 130, during the process of being converted from the first state to the second state. The plurality of pillar parts may be connected to each other so as to be rotatable, and the shape of the pillar cross-section 230 may be changed through rotation between the plurality of pillar parts, and also, the shape may be changed through rotation of the linkage pillar part 212 with respect to the main pillar part 211.
The pillar cross-section 230 may be changed so that a distance between the pair of sides facing each other of the plurality of sides is reduced during the process of being converted from the first state to the second state. For example, the pillar cross-section 230 may be changed so that a distance between the inner pillar part 213 and the main pillar part 211 is reduced.
In the second state, the pair of edges may be disposed vertically with respect to the ground. That is, in the second state, the main pillar part 211 and the inner pillar part 213 may be disposed in a direction Z perpendicular to the ground, and a distance between the main pillar part 211 and the inner pillar part 213 may be reduced. That is, the pillar frame 200 may be deformed so that the height of the pillar cross-section 230 is reduced in the second state.
The pillar cross-section 230 may be deformed so that the pair of sides come closer through the four bar link motion of the plurality of sides in the process of being converted from the first state to the second state, as described in the support cross-section 130.
The pair of sides that rotate in the pillar cross-section 230 may correspond to the linkage pillar part 212, and the pair of sides that are maintained in the longitudinal direction may correspond to the inner pillar part 213 and the main pillar part 211.
That is, in an embodiment of the present invention, one of the main pillar part 211 and the inner pillar part 213 may be connected to the upper hinge shaft 251, and the linkage pillar part 212 may rotate with respect to one of the main pillar parts to generate the four bar link motion.
In relation to this, when the pair of linkage pillar parts 212 are provided as described above, the pair of linkage pillar parts 212 may have the same rotation direction as illustrated in FIGS. 15 to 18.
That is, one of the pair of linkage pillar parts 212 may be disposed to protrude in the second direction Y from the main pillar part 211 in the second state, and the other may be disposed above the main pillar part 211.
In the process of being converted from the first state to the second state, the pillar frame 200 may rotate around the upper hinge shaft 251, and the linkage pillar part 212 may rotate around the pillar hinge shaft 220, and thus, the area of the pillar cross-section 230 may be reduced.
FIG. 19 illustrates a support inclination part 115 of the support frame 100 and a pillar inclination part 215 of the pillar frame 200, and FIG. 20 illustrates a linkage joint 400 coupled to the support inclination part 115 and the pillar inclination part 215.
In an embodiment of the present invention, the linkage support part 112 and the pillar frame 200 may be connected through the linkage joint 400. The linkage joint 400 may rotatably connect the linkage support part 112 to the pillar frame 200 so that the linkage support part 112 is interlocked with the pillar frame 200.
In the linkage joint, a joint shaft 401 that serves as a center of rotation between the joint support part 112 and the pillar frame 200 of the linkage joint 400 may extend in a different direction from the upper hinge shaft 251 that serves as a center of rotation of the pillar frame 200 with respect to the support frame 100.
That is, the pillar frame 200 may have a coupling relationship with the support frame 100 through two shafts with different axial directions, and thus, the rotation of the pillar frame 200 centered on the upper hinge shaft 251 may cause the rotation of the linkage support part 112 through the linkage joint 400.
Specifically, in the first state, the joint shaft 401 of the linkage joint 400 and the upper hinge shaft 251 may have an approximately vertical relationship in the extension direction with each other. That is, if there is no change in the joint shaft 401, the pillar frame 200 may not rotate around the upper hinge shaft 251.
Based on this physical relationship, the rotational movement of the pillar frame 200 may cause an axial change in the linkage joint 400. Since the linkage joint 400 is connected to the linkage support part 112, the rotation of the pillar frame 200 centered on the upper hinge shaft 251 may ultimately induce the rotation of the linkage support part 112 centered on the support hinge shaft 120, thereby causing the axial change in the joint shaft 401.
As described above, in an embodiment of the present invention, the rotation of the pillar frame 200 coupled to the support frame 100 through the upper hinge shaft 251 and the linkage joint 400 having different axial directions may form a linkage relationship with the linkage support part 112, and the worker may induce the rotation of the pillar frame 200 by causing the rotation of the linkage support part 112 depending on convenience thereof.
The linkage joint 400 may be provided in various types and may be coupled at various positions of the linkage support part 112 and the pillar frame 200. For example, the linkage joint 400 may be connected to the above-described support inclination part 115 and the pillar inclination part 215.
The support inclination part 115 may be provided on the linkage support part 112. The extension direction of the support inclination part 115 may be parallel to the joint shaft 401 of the linkage joint 400. That is, the support inclination part 115 may be axially different from the upper hinge shaft 251 and may be axially different from the support hinge shaft 120, just like the joint shaft 401. Furthermore, the pillar hinge shaft 220 and the joint shaft 401 may have different extension directions so that a change in the pillar cross-section 230 is induced.
For example, the support hinge shaft 120 may be parallel to the first direction X described above, the upper hinge shaft 251 may be parallel to the second direction Y described above, and the pillar hinge shaft 220 may be perpendicular to the ground. The joint shaft 401 may extend obliquely with respect to the support hinge shaft 120, the upper hinge shaft 251, and the pillar hinge shaft 220.
In the first state, the joint shaft 401 may extend on a virtual one surface extending along the first direction X and the direction perpendicular to the ground Z, and may extend obliquely with respect to the first direction X and the direction perpendicular to the ground Z.
In the second state, the joint shaft 401 may extend on a virtual one surface extending along the first direction X and the second direction Y, and may extend obliquely in the first direction X and the second direction Y.
The joint shaft 401 may be coupled to the linkage support part 112, and thus, the joint shaft 401 may rotate together with the rotation of the linkage support part 112 with respect to the support hinge shaft 120. The axial rotation of the joint shaft 401 may induce the rotation of the linkage support part 112 and the linkage pillar part 212 while allowing the rotation of the pillar frame 200 with respect to the support frame 100.
The pillar inclination part 215 may be disposed adjacent to the support inclination part 115 so as to face the support inclination part 115 and may extend parallel to the support inclination part 115. The pillar inclination part 215 may be disposed variously in the pillar frame 200. For example, the pillar inclination part 215 may be provided on the linkage pillar part 212 and may interlock the rotation of the linkage support part 112 with the rotation of the linkage pillar part 212.
In an embodiment of the present invention, the plurality of pillar parts may include a main pillar part 211 and a linkage pillar part 212 that is rotatably connected to the main pillar part 211 through a pillar hinge shaft 220 orthogonal to the second direction Y, and the linkage joint 400 may rotatably connect the linkage pillar part 212 to the linkage support part 112.
The support inclination part 115 may extend obliquely with respect to the first direction X. That is, the support inclination part 115 may extend at an angle relative to the longitudinal direction of the main support part 111.
The pillar inclination part 215 may be disposed to face the support inclination part 115 to extend parallel to the support inclination part 115. The linkage joint 400 may rotatably connect the support inclination part 115 to the pillar inclination part 215.
FIG. 21 illustrates a process in which the linkage joint 400 of FIG. 20 rotates to be converted from the first state to the second state, and FIG. 22 illustrates a state in which the linkage joint 400 of FIG. 20 is completely converted to the second state.
Referring to FIG. 21, as described above, the rotation of the pillar frame 200 centered on the upper rotation shaft in the first state may not be performed unless the axial change of the joint shaft 401 occurs due to the relationship with the joint shaft 401 of the linkage joint 400.
In other words, the rotation of the pillar frame 200 centered on the upper hinge shaft 251 may induce the rotation of the linkage joint 400, that is, the rotation of the linkage support part 112 centered on the support hinge shaft 120.
The rotation of the linkage support part 112 centered on the support hinge shaft 120 may cause a change in the support cross-section 130 according to the above-described four bar link motion and may cause the rotation of the linkage pillar part 212 connected to the linkage joint 400 centered on the pillar hinge shaft 220.
That is, the linkage pillar part 212 may rotate around the pillar hinge shaft 220 with respect to the main pillar part 211 at the same time as the pillar frame 200, for example, the first divided frame 201, may rotate around the upper hinge shaft 251 depending on the relationship with the linkage support part 112 connected to the linkage joint 400.
The rotation of this linkage pillar part 212 may cause a change in the pillar cross-section 230 according to the above-described four bar link motion. That is, in an embodiment of the present invention, all the rotation of the pillar frame 200 with respect to the support frame 100, the rotation of the linkage support part 112 with respect to the main support part 111, the rotation of the linkage pillar part 212 with respect to the linkage support part 112, and the rotation of the linkage pillar part 212 with respect to the main pillar part 211 may organically and simultaneously occur.
FIG. 22 illustrates the linkage joint 400 in the second state. In the second state, the linkage support part 112 may rotate to protrude in the second direction Y with respect to the main support part 111, and the linkage pillar part 212 may rotate to protrude in the second direction Y with respect to the main pillar part 211.
The linkage support part 112 and the linkage pillar part 212 may be stacked vertically, and the linkage joint 400 at which approximate edges of the linkage support part 112 and the linkage pillar part 212 are disposed may also be disposed in the second direction Y from the main support part 111.
In an embodiment of the present invention, the linkage support part 112 may be rotatably connected to the pillar frame 200 through the linkage joint 400, of which an axial direction is different from that of each of the upper hinge shaft 251 and the support hinge shaft 120, and thus may rotate around the support hinge shaft 120 by being interlocked with the pillar frame 200.
The pillar frame 200 may be connected to the support frame 100 through the upper hinge shaft 251, and the joint shaft 401 of the linkage joint 400 and the upper hinge shaft 251 may extend in different directions.
The joint shaft 401 of the linkage joint 400 may rotate in the axial direction together with the linkage support part 112 and may rotate together with the linkage support part 112 to face the ground in the first state and be parallel to the ground in the second state.
At least a portion of the pillar frame 200, for example, the linkage pillar part 212, may be interlocked with the linkage support part 112 through the linkage joint 400 and may rotate around the upper hinge shaft 251.
In the pillar frame 200, any one of the plurality of pillar parts, for example, the linkage pillar part 212 may be connected to the linkage support part 112 through the linkage joint 400 and may be interlocked with the linkage support part 112 while rotating around the upper hinge shaft 251, and thus, the pillar cross-section 230 may be changed.
The linkage support part 112 may rotate around the support rotation shaft by being interlocked with the rotation of the pillar frame 200 about the upper hinge shaft 251. The linkage pillar part 212 may rotate around the pillar hinge shaft 220 by being interlocked with the rotation of the linkage support part 112 about the support rotation shaft through the linkage joint 400.
The linkage pillar part 212 may be connected to the linkage support part 112 through the linkage joint 400 and thus may rotate with respect to the main pillar part 211 by being interlocked with the linkage support part 112.
However, in an embodiment of the present invention, the pillar inclination part 215 may not necessarily have to be provided in the linkage pillar part 212, and one of the plurality of pillar parts defining one side of the pillar cross-section 230 may include the pillar inclination part 215, and in the process of being converted from the first state to the second state, the pillar cross-section 230 may come closer to each other through the four bar link motion while having the pair of sides facing each other in a parallel state.
FIG. 23 illustrates the linkage joint 400 according to an embodiment of the present invention. In an embodiment of the present invention, the linkage joint 400 may include a first joint body 410, a second joint body 420, and a banding member 430.
The first joint body 410 may be fixed to the linkage support part 112, and the second joint body 420 may be fixed to the pillar frame 200. The banding member 430 may connect the first joint body 410 to the second joint body 420 so that the first joint body 410 to the second joint body 420 rotate while being in contact with each other.
The linkage joint 400 may be provided as a roll contact joint type in which the first joint body 410 and the second joint body 420 are wound by the banding member 430.
Specifically, in an embodiment of the present invention, the first joint body 410 and the second joint body 420 of the linkage joint 400 may be connected to each other at a constant distance by the banding member 430. The banding member 430 may be made of a flexible material that is capable of being bent while maintaining a constant length.
The banding member 430 may extend to cross the first joint body 410 and the second joint body 420. For example, as illustrated in FIG. 23, the banding member 430 may be provided in plurality, and one banding member 430 may be connected to the other side of the second joint body 420 while being connected to one side of the first joint body 410, and another banding member 430 adjacent to one of the banding members 430 may be connected to each of the other side of the first joint body 410 and one side of the first joint body 410.
One side and the other side of the joint body may be defined along the rotational direction of the joint body with respect to the joint side. For example, one of the banding members 430 may be connected to one side of the first joint body 410 disposed in one direction from the first joint body 410 by using the joint shaft 401 defined mechanically as a center.
In addition, any one of the banding members 430 may be connected to the other side of the second joint body 420 disposed in the other direction from the second joint body 420 by using the joint shaft 401 as a center.
A distance between the first joint body 410 and the second joint body 420 may be fixed by a length of the banding member 430.
In addition, the banding member 430 may be provided in plurality, and a pair of adjacent banding members 430 may be arranged alternately so that their length directions intersect each other, and thus, a distance between the first joint body 410 and the second joint body 420 may be maintained in spite of the bidirectional rotational movement of the linkage joint 400.
However, the banding member 430 may not necessarily have to be provided in provided, and the first joint body 410 and the second joint body 420 may be alternately wound around one banding member 430 to achieve the same effect as the arrangement the plurality of banding members 430.
The first joint body 410 and the second joint body 420 of the linkage joint 400 may be always in contact with each other in the first state and the second state, and thus, the loads may be mutually transmitted. That is, the linkage joint 400 according to an embodiment of the present invention may rotate while the first joint body 410 and the second joint body 420 are always in contact with each other, and thus, it may be easy to support the load and also easy to secure the rotate between the members.
Each of the first joint body 410 and the second joint body 420 may include a banding accommodation part 460 and a joint contact surface 450. The banding accommodation part 460 may provide an area around which the banding member 430 is wound and may have a shape that is more recessed than the joint contact surface 450. However, if necessary, the banding accommodation parts 460 may be in contact with each other to perform a function of the joint contact surface 450.
The joint contact surface 450 may provide a surface on which the first joint body 410 and the second joint body 420 are in contact with each other and support each other, and thus, in an embodiment of the present invention, the linkage joint 400 may enable mutual rotation while transferring the load between the linkage support part 112 and the pillar frame 200, i.e., the first divided frame 201.
Referring again to FIG. 20, an embodiment of the present invention may include a linkage support part 440. The linkage support part 440 may be provided on at least one of the linkage support part 112 or the pillar frame 200 in the first state to support the linkage joint 400 upward.
In an embodiment of the present invention, the linkage joint 400 may be disposed on a path along which the load of the object is transmitted in the first state. That is, the linkage joint 400 may need to have rigidity to withstand the load of the object, and the linkage support part 440 may be provided to support the linkage joint 400 in the first state, thereby increasing in allowable load transmitted from the linkage joint 400.
Each of the first joint body 410 and the second joint body 420 of the linkage joint 400 may have a shape of which at least a portion protrudes from the support frame 100 and the pillar frame 200, and the linkage support part 440 may be provided on at least one of the support frame 100 or the pillar frame 200 so as to be in contact with the protruding portion of at least one of the first joint body 410 or the second joint body 420.
The linkage support part 440 may include a first support part 441 and a second support part 442. The first support part 441 may be provided on the linkage support part 112 to support the first joint body 410, and the second support part 442 may be provided on the pillar frame 200 to support the second joint body 420.
When the second joint body 420 is provided on the linkage pillar part 212, the second support part 442 may also be provided on the linkage pillar part 212 and be disposed below the protruding portion of the second joint body 420 to support the second joint body 420.
In addition, in the first state, at least a portion of the second support part 442 may be disposed below the first support part 441 to support the first support part 441. The second support member 442 provided on the pillar frame 200 may be easily disposed lower than the first support member 441 provided on the support frame 100.
Thus, in an embodiment of the present invention, a portion of the second support part 442 may be in contact with the second joint body 420, and at least a portion of the remaining portion of the second support part 442 may be in contact with the first support part 441 below the first support part 441, and thus, the second support part 442 may directly support the first support part 441 and the second joint body 420.
Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments may be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.

Claims

A foldable scaffold comprising:
a support frame configured to support an object; and

a pillar frame disposed below the support frame and rotatably connected to the support frame,

wherein the pillar frame comprises a plurality of divided frames which are sequentially connected from the support frame,
wherein the plurality of divided frames are rotatably connected to each other, and

a longitudinal direction of each of the plurality of divided frames faces the ground in a first state, and the longitudinal direction of each of the plurality of divided frames is parallel to the ground in a second state in which the plurality of divided frames rotate from the first state.
The foldable scaffold of claim 1, wherein, in the second state, the divided frames are disposed without getting out of both ends of the support frame on the basis of the longitudinal direction of the support frame.
The foldable scaffold of claim 2, wherein the pillar frame further comprises a divided hinge shaft configured to rotatably connect a pair of adjacent divided frames of the plurality of divided frames to each other, and
the plurality of divided frames rotate so that the divided hinge shaft moves toward the support frame in the first state so as to be converted into the second state.
The foldable scaffold of claim 1, wherein, in the second state, a portion of the pillar frame protrudes further than the support frame in a direction that is transverse to the longitudinal direction of the support frame.
The foldable scaffold of claim 4, wherein, in the second direction, a portion of each of the plurality of divided frames protrudes further than the support frame in a direction that is transverse to the longitudinal direction of the support frame.
The foldable scaffold of claim 1, wherein the plurality of divided frames comprise a first divided frame and a second divided frame,
wherein one end of the first divided frame is rotatably connected to the support frame, and

one end of the second divided frame is rotatably connected to the other end of the first divided frame,
wherein, in a process of being converted from the first state to the second state, the other end of the first divided frame and the one end of the second divided frame rotate to come closer to the support frame.
The foldable scaffold of claim 1, wherein the support frame comprises a plurality of support parts,
wherein the plurality of support parts comprises a main support part and a linage support part rotatably connected to the main support part to rotate by being interlocked with the pillar frame.
The foldable scaffold of claim 7, wherein the support frame comprises a support cross-section in which a plurality of sides are defined by the plurality of support parts, respectively,
wherein any one of the plurality of sides of the support cross-section is defined by the linkage support part, and

in a process of being converted from the first state to the second state, the pillar frame is deformed so that a height of the support cross-section is reduced.
The foldable scaffold of claim 8, wherein, in the process of being converted from the first state to the second state, the support cross-section is deformed through a four bar link motion so that a pair of opposing sides of the plurality of sides come closer to each other while being parallel to each other.
The foldable scaffold of claim 7, wherein the main support part and the linkage support part extend along a first direction parallel to the ground, and
the linkage support part is connected to the main support part through a support hinge shaft extending along the first direction.
The foldable scaffold of claim 10, wherein, in the first state, the linkage support part is disposed below the main support part, and
in the second state, the linkage support part is aligned in a direction parallel to the ground.
The foldable scaffold of claim 11, wherein, in a process of being converted from the first state to the second state, at least a portion of the pillar frame protrudes in the direction parallel to the ground with respect to the main support part together with the linkage support part.
The foldable scaffold of claim 10, further comprising a linkage joint configured to rotatably connect the linkage support part to the pillar frame so that the linkage support part is interlocked with the pillar frame.
The foldable scaffold of claim 13, wherein a joint shaft of the linkage joint rotates axially together with the linkage support part.
The foldable scaffold of claim 13, wherein the pillar frame is connected to the support frame through an upper hinge shaft, and
a joint shaft of the linkage joint and the upper hinge shaft extend in different directions.
The foldable scaffold of claim 15, wherein the upper hinge shaft, the support hinge shaft, and the joint shaft have different axial directions.
The foldable scaffold of claim 16, wherein the upper hinge shaft extends in a second direction orthogonal to the first direction, and
the joint shaft extends obliquely with respect to the first direction.
The foldable scaffold of claim 13, wherein the linkage support part comprises a support inclination part extending obliquely with respect to the first direction,
the pillar frame comprises a pillar inclination part disposed to face the support inclination part and extending parallel to the support inclination part, and

the linkage joint is configured to rotatably connect the support inclination part to the pillar inclination part.
The foldable scaffold of claim 18, wherein at least a portion of the pillar frame is interlocked with the linkage support part through the linkage joint to rotate around the upper hinge shaft.
The foldable scaffold of claim 19, wherein the pillar frame comprises:
a plurality of pillar parts;

a pillar cross-section of which a plurality of sides are defined by the plurality of pillar parts, respectively,

wherein any one of the plurality of pillar parts, which defines one side of the pillar cross-section, comprises the pillar inclination part, and

in a process of being converted from the first state to the second state, the pillar cross-section has a pair of sides facing each other are closer to each other through a four bar link motion in a parallel state.
The foldable scaffold of claim 1, further comprising a bottom frame disposed below the pillar frame,
wherein the pillar frame is rotatably connected to the support frame through an upper hinge shaft and rotatably connected to the bottom frame through a lower hinge shaft.
The foldable scaffold of claim 21, wherein the plurality of divided frames comprise:
a first divided frame connected to the support frame through the upper hinge shaft; and

a second divided frame connected to the first divided frame through the divided hinge shaft and connected to the bottom frame through the lower hinge shaft.
The foldable scaffold of claim 22, wherein, in a process of being converted from the first state to the second state, the divided hinge shaft moves closer to a center of the support frame.