Box structure

Abstract

To provide a box structure which has a simple structure, can be stored in a compactly folded state, and can be unfolded from the compactly folded state.SOLUTION: Replacing a conventional box structure with a front-rear partial structure, a left-right partial structure, and a bottom partial structure, the front-rear partial structure including an upper front-rear partial structure and a lower front-rear partial structure, a right edge of the upper front-rear partial structure being connected to the right partial structure, a left edge of the upper front-rear partial structure being connected to the left partial structure, the upper front-rear partial structure being capable of expanding and contracting a separation distance between the right edge and the left edge in a left-right direction, an edge of the lower front-rear partial structure being connected to one of the left-right partial structure and the bottom partial structure so as to be swingable about a rotation shaft; When the lower front-rear portion structure swings about the rotation shaft, a posture of the lower front-rear portion structure changes between a formed posture and a folded posture.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a box structure, and more particularly to a box that can be easily folded. [Background technology]

[0002] A box is used to organize objects. For example, in the cleaning industry, clothes, towels, etc. to be cleaned are placed in a box for each of a plurality of cleaning steps, with the processed clothes, towels, etc. being placed in a box for the next step. For example, in a typical household, garbage and the like is placed in a box at a collection point.

[0003] When not in use, fold the box compactly for storage. When using it, unfold it from its compact folded state.

[0004] Various structures have been proposed for folding and unfolding the box. Be especially careful not to pinch your fingers when folding. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventor proposes a simple box structure that can be folded compactly for storage and can be unfolded from the compactly folded state. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a box structure that can divide a virtual storage space and can change its posture between a formed posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folded posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The front and rear partial structures each have an upper front and rear partial structure that is a partial structure that can define at least a portion of a pair of front and rear side surfaces of a box-shaped structure formed in the storage space, and a lower front and rear partial structure that is a partial structure that can define at least a portion below the location defined by the upper front and rear partial structure on the pair of front and rear side surfaces of the box-shaped structure formed in the storage space, a right edge of the upper front and rear partial structure connected to the right partial structure, and a left edge of the upper front and rear partial structure connected to the left partial structure; The upper front and rear partial structure is capable of expanding and contracting the distance between the right edge and the left edge in the left-right direction, The edges of the lower front and rear partial structure are connected to one of the left and right partial structures or the bottom partial structure so as to be swingable about a rotation axis; When the lower front and rear partial structure swings around the rotation axis, its posture changes between a built-up posture and a folded posture, When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the lower front and rear imaginary planes face each other with left and right imaginary planes which are imaginary planes that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space, It was decided.

[0007] In the above configuration of the present invention, The forming posture is a posture in which the storage space is formed into a box shape made up of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface. The folded position is a position in which the storage space is reduced in the left-right direction by being folded. The left and right partial structures, which have a pair of left and right partial structures, can define a pair of left and right side surfaces of the box-like shape formed in the storage space. The front and rear partial structures, which are a pair of front and rear partial structures, can define a pair of front and rear side faces of a box-like shape formed in the storage space. The bottom partial structure, which is a partial structure, can define the bottom surface of the box shape formed in the storage space. Equipped with The front or rear partial structure has an upper front / rear partial structure which is a partial structure that can partition at least a portion of a pair of front and rear side surfaces of a box-shaped structure formed in the storage space, and a lower front / rear partial structure which is a partial structure that can partition at least a portion below the area partitioned by the upper front / rear partial structure on a pair of front and rear side surfaces of a box-shaped structure formed in the storage space. The right edge of the upper front and rear substructure is connected to the right substructure. The left edge of the upper front and rear substructure is connected to the left substructure. The upper front and rear partial structure is capable of expanding and contracting the distance between the right edge and the left edge in the left-right direction. The edges of the lower front and rear partial structure are connected to one of the left and right partial structures or the bottom partial structure so as to be able to swing freely about a rotation axis. When the lower front and rear substructure swings around the rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a lower front and rear imaginary surface, which is a surface that can be imagined as the interior dimensions of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box-like shape formed in the storage space. When in the folded position, the lower front and rear imaginary surfaces face each other with left and right imaginary surfaces, which are imaginary surfaces that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a portion of a pair of left and right side surfaces of a box-like shape formed in the storage space. As a result, the storage space can be changed between a box-shaped configuration and a folded configuration in which the storage space is contracted in the left-right direction.

[0008] The present invention includes any one of the following embodiments or a combination of two or more of the following embodiments.

[0009] In the box structure according to the embodiment of the present invention, when the box structure is in the formed posture, the lower front and rear partial structures and the upper front and rear partial structures can be detachably connected to each other. In the configuration of the above embodiment, when in the forming posture, the lower front and rear partial structures and the upper front and rear partial structures can be detachably connected. As a result, the storage space can be changed between a formed position in which it assumes a box-like shape and a folded position in which it contracts in the left-right direction, and the formed position can be stabilized.

[0010] The upper front and rear partial structure may be divided into two pieces, left and right. The box structure according to an embodiment of the present invention includes: The upper front and rear partial structure has a pair of partial structures that are separated into left and right parts when viewed from the front, namely a right upper front and rear partial structure and a left upper front and rear partial structure, When viewed from the front, the left edge of the right upper front-rear partial structure and the right edge of the left upper front-rear partial structure are connected to each other so as to be able to swing freely around a second vertical rotation axis, which is a vertical rotation axis; a right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be swingable about a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right upper front and rear partial structure swings around the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front and rear partial structure is in the formed posture, a right upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right upper front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be swingable about a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left upper front and rear partial structure swings around the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left upper front and rear partial structure is in the formed posture, a left upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-shaped shape formed in the storage space, When in the folded posture, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space. In the configuration of the above embodiment, The upper front and rear partial structure has a pair of partial structures, a right upper front and rear partial structure and a left upper front and rear partial structure, which are separated into left and right parts when viewed from the front. When viewed from the front, the left edge of the right upper front-rear partial structure and the right edge of the left upper front-rear partial structure are connected to be able to swing freely around a second vertical rotation axis, which is a vertical rotation axis. The right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be able to swing freely around a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure. When the right upper front and rear substructure pivots about the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a right upper front and rear imaginary surface, which is a surface that can be imagined as the interior dimension of the right upper front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space. When in the folded position, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the right partial structure and can partition the right side of the box-like shape formed in the storage space. The left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be able to swing freely around a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure. When the left upper front and rear substructure pivots about the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a left upper front and rear imaginary surface, which is a surface that can be imagined as the interior dimension of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-like shape formed in the storage space. When in the folded position, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure and that can partition the left side of the box-like shape formed in the storage space. As a result, the storage space can be changed between a formed position in which it assumes a box-like shape and a folded position in which it contracts in the left-right direction, and the formed position and the folded position can be stabilized.

[0011] The upper front and rear partial structure may be divided into three pieces. The box structure according to an embodiment of the present invention includes: The upper front and rear partial structure has a right upper front and rear partial structure and a left upper front and rear partial structure which are separated into left and right parts when viewed from the front, and a central upper front and rear partial structure located between the right upper front and rear partial structure and the left upper front and rear partial structure, a left edge of the right upper front-rear partial structure and a right edge of the central upper front-rear partial structure are connected to each other so as to be swingable about a second right vertical rotation axis, which is a vertical rotation axis; a right edge of the left upper front-rear partial structure and a left edge of the central upper front-rear partial structure are connected to each other so as to be swingable about a second left vertical rotation axis, which is a vertical rotation axis; a right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be swingable about a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right upper front and rear partial structure swings around the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front and rear partial structure is in the formed posture, a right upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right upper front and rear partial structure, defines at least a part of the front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be swingable about a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left upper front and rear partial structure swings around the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left upper front and rear partial structure is in the formed posture, a left upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-shaped shape formed in the storage space, When in the folded posture, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space. In the configuration of the above embodiment, The upper front and rear partial structure has a right upper front and rear partial structure and a left upper front and rear partial structure which are separated into left and right parts when viewed from the front, and a central upper front and rear partial structure located between the right upper front and rear partial structure and the left upper front and rear partial structure. The left edge of the right upper front-rear partial structure and the right edge of the central upper front-rear partial structure are connected to each other so as to be able to swing freely around a second right vertical rotation axis, which is a vertical rotation axis. The right edge of the left upper front-rear partial structure and the left edge of the central upper front-rear partial structure are connected to each other so as to be able to swing freely around a second left vertical rotation axis, which is a vertical rotation axis. The right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be able to swing freely around a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure. When the right upper front and rear substructure pivots about the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a right upper front and rear imaginary surface, which is a surface that can be imagined as the interior dimension of the right upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-like shape formed in the storage space. When in the folded position, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the right partial structure and can partition the right side of the box-like shape formed in the storage space. The left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be able to swing freely around a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure. When the left upper front and rear substructure pivots about the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a left upper front and rear imaginary surface, which is a surface that can be imagined as the interior dimension of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-like shape formed in the storage space. When in the folded position, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure and that can partition the left side of the box-like shape formed in the storage space. As a result, the storage space can be changed between a formed position in which it assumes a box-like shape and a folded position in which it contracts in the left-right direction, and the formed position and the folded position can be stabilized.

[0012] The upper front and rear substructure may move up and down. The box structure according to an embodiment of the present invention includes: The upper front and rear partial structure can move up and down along the axial direction of the first vertical rotation shaft, In the forming posture, when the upper front-rear partial structure moves downward, the upper front-rear partial structure and the lower front-rear partial structure are connected, and when the upper front-rear partial structure moves upward, the connection between the upper front-rear partial structure and the lower front-rear partial structure is released. In the configuration of the above embodiment, The upper front and rear partial structure can move up and down along the axial direction of the first vertical rotation shaft. In the forming posture, when the upper front-rear partial structure moves downward, the upper front-rear partial structure and the lower front-rear partial structure are connected, and when the upper front-rear partial structure moves upward, the connection between the upper front-rear partial structure and the lower front-rear partial structure is released. As a result, the forming posture can be easily stabilized.

[0013] The box structure has a first biasing structure that biases the upper front and rear partial structure so that the left upper front and rear partial structure and the right upper front and rear partial structure move from a formed position to a folded position. In the configuration of the above embodiment, the first biasing structure is a structure that biases the left upper front / rear partial structure and the right upper front / rear partial structure from their formed position to their folded position. As a result, the posture can be changed from the built-up posture to the folded posture with little force.

[0014] The box structure has a second biasing structure, which is a mechanism that biases the bottom portion structure so that the right bottom portion structure and the left bottom portion structure move from a formed position to a folded position. In the configuration of the above embodiment, the second biasing structure is a mechanism that biases the right bottom portion structure and the left bottom portion structure from the formed position to the folded position. As a result, the posture can be changed from the built-up posture to the folded posture with little force.

[0015] The bottom portion structure may be one piece or two pieces. The box structure according to an embodiment of the present invention includes: The left edge or the right edge of the bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When the bottom portion structure pivots about the fourth horizontal axis of rotation, the bottom portion structure changes its position between a formed position and a folded position; When the bottom portion structure is in the formed position, a bottom imaginary surface that can be imagined as an internal dimension of the bottom portion structure defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the bottom virtual surface faces left and right virtual surfaces, which are virtual surfaces that can partition at least a portion of a pair of left and right side surfaces of a box-shaped configuration formed in the storage space of the right partial structure or the left partial structure. In the configuration of the above embodiment, The left edge or the right edge of the bottom structure is connected to at least one of the right and left partial structures so as to be able to swing freely about a fourth horizontal rotation axis, which is a horizontal rotation axis. As the base structure pivots about the fourth horizontal axis of rotation, it changes position between a forming position and a folded position. When in the formed position, a bottom imaginary surface, which is a surface that can be imagined as the inside dimension of the bottom portion structure, defines at least a part of the bottom surface of the box-like shape formed in the storage space. When in the folded position, the bottom imaginary surface faces left and right imaginary surfaces, which are imaginary surfaces that can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space of the right partial structure or the left partial structure. As a result, the folded position can be stabilized.

[0016] The bottom portion structure may be in two pieces. In the box structure according to an embodiment of the present invention, the bottom portion structure has a right bottom portion structure and a left bottom portion structure that are separated into left and right parts when viewed from the front, When viewed from the front, the left edge of the right bottom portion structure and the right edge of the left bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis, which is a horizontal rotation axis; a right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the right bottom portion structure pivots about the fourth right horizontal rotation axis, its posture changes between a built-up posture and a folded posture; When in the formed posture, a right bottom imaginary plane, which is a plane that can be imagined on the inside dimension of the right bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the right bottom imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space. a left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; When the left bottom portion structure pivots about the fourth left horizontal rotation axis, the left bottom portion structure changes its position between a formed position and a folded position; When the left bottom portion structure is in the formed position, a left bottom imaginary plane, which is a plane that can be imagined as an internal dimension of the left bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the left bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure and that can partition the left side of the box-shaped configuration formed in the storage space. In the configuration of the above embodiment, The bottom portion structure has a right bottom portion structure and a left bottom portion structure that are separated into left and right parts when viewed from the front. When viewed from the front, the left edge of the right bottom partial structure and the right edge of the left bottom partial structure are connected to be able to swing freely around a fifth horizontal rotation axis, which is a horizontal rotation axis. The right edge of the right bottom portion structure is connected to the right portion structure so as to be able to swing freely around a fourth right horizontal rotation axis, which is a horizontal rotation axis. When the right bottom portion structure pivots about the fourth right horizontal rotation axis, its position changes between a built-up position and a folded position. When in the formed position, a right bottom imaginary plane, which is a plane that can be imagined as the inside dimension of the right bottom portion structure, defines at least a part of the bottom surface of the box-like shape formed in the storage space. When in the folded position, the right bottom imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined as the inside dimensions of the right partial structure and can partition the right side of the box-shaped shape formed in the storage space. The left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis. When the left bottom portion structure pivots about the fourth left horizontal axis of rotation, its position changes between a built-up position and a folded position. When in the formed position, a left bottom imaginary plane, which is a plane that can be imagined on the inside dimension of the left bottom portion structure, defines at least a portion of the bottom surface. When in the folded position, the left bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can define the left side surface of a box-like shape formed in the storage space. As a result, the forming posture and the folding posture can be stabilized.

[0017] The upper front and rear substructure may move up and down to avoid the bottom substructure. The box structure according to an embodiment of the present invention includes: When in the folded position, the upper front and rear partial structure can move upward along the axial direction of the first vertical rotation axis to a position where the bottom of the upper front and rear partial structure is higher than the top of the bottom partial structure. In the configuration of the above embodiment, When in the folded position, the upper front and rear substructure can move upward along the axial direction of the first vertical rotation axis to a position where the bottom of the upper front and rear substructure is above the top of the bottom substructure. As a result, when the position is changed between the formed position and the folded position, interference between the upper front and rear partial structures and the bottom partial structure can be prevented.

[0018] The bottom portion structure may be divided into a first and a second portion at the front and rear. The box structure according to an embodiment of the present invention includes: The bottom portion structure has a first bottom portion structure and a second bottom portion structure which are a plurality of portion structures separated in the front-rear direction and arranged in series, The one bottom portion structure has a right one bottom portion structure and a left one bottom portion structure that are separated into left and right when viewed from the front, The left edge of the right-side bottom portion structure and the right edge of the left-side bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis, which is a horizontal rotation axis; a right edge of the right one bottom portion structure is connected to the right portion structure so as to be swingable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the right one bottom portion structure swings around the fourth right horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the storage space is in the formed position, a right-side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the right-side bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the right-side one-bottom imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left one-side bottom portion structure is connected to the left portion structure so as to be swingable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; When the left one bottom portion structure swings around the fourth left horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the left side bottom portion structure is in the formed posture, a left side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the left side bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the left one-bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, The left edge or the right edge of the other bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When the other bottom portion structure swings about the fourth horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the storage space is in the formed position, the other bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the other bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the other bottom imaginary surface faces an imaginary surface that can be imagined as an interior dimension of the right partial structure or the left partial structure and that can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space, When in the forming position, the one bottom partial structure and the other bottom partial structure can be detachably connected to each other. In the configuration of the above embodiment, the bottom portion structure has a first bottom portion structure and a second bottom portion structure, which are a plurality of partial structures separated in the front-rear direction and arranged in series. The one bottom portion structure is divided into a right one bottom portion structure and a left one bottom portion structure when viewed from the front. The left edge of the right one-bottom structure and the right edge of the left one-bottom structure are connected to be able to swing freely around a fifth horizontal rotation axis, which is a horizontal rotation axis. The right edge of the right one bottom portion structure is connected to the right portion structure so as to be able to swing freely around a fourth right horizontal rotation axis, which is a horizontal rotation axis. When the right one bottom portion structure swings about the fourth right horizontal rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, the right side bottom imaginary surface, which is a surface that can be imagined as the inside dimension of the right side bottom portion structure, defines at least a part of the bottom surface of the box shape formed in the storage space. When in the folded position, the right-side one-bottom imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the right partial structure and that can partition the right side surface of the box-shaped structure formed in the storage space. The left edge of the left one-bottom bottom structure is connected to the left section structure so as to be able to swing freely about a fourth left horizontal rotation axis, which is a horizontal rotation axis. When the left one bottom portion structure swings about the fourth left horizontal rotation axis, its posture changes between a forming posture and a folding posture. When in the formed position, the left side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the left side bottom portion structure, defines at least a part of the bottom surface of the box shape formed in the storage space. When in the folded position, the left-side bottom imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and that can partition the left side of the box-shaped shape formed in the storage space. The left edge or the right edge of the other bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely about a fourth horizontal rotation axis, which is a horizontal rotation axis. When the other bottom portion structure swings about the fourth horizontal rotation axis, its position changes between a formed position and a folded position. When in the formed position, the other bottom imaginary surface, which is a surface that can be imagined as the inside dimension of the other bottom portion structure, defines at least a part of the bottom surface of the box-like shape formed in the storage space. When in the folded position, the other bottom imaginary surface faces an imaginary surface that can be imagined as the interior dimensions of the right partial structure or the left partial structure and that can partition at least a portion of a pair of left and right side surfaces of a box-like shape formed in the storage space. When in the forming position, the one bottom partial structure and the other bottom partial structure can be detachably connected to each other. As a result, the formation posture can be stabilized.

[0019] The lower front and rear substructure may swing about a vertical axis of rotation. The box structure according to an embodiment of the present invention includes: The right edge or the left edge of the lower front and rear partial structure is connected to at least one of the right partial structure or the left partial structure so as to be swingable about a third vertical rotation axis which is a rotation axis perpendicular to the right partial structure, When the lower front and rear partial structure swings around the third vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the lower front and rear imaginary planes face each other, and the left and right imaginary planes are imaginary planes that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space. In the configuration of the above embodiment, the right or left edge of the lower front and rear partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a third vertical rotation axis, which is a rotation axis perpendicular to the right partial structure or the left partial structure. When the lower front and rear substructure pivots about the third vertical axis of rotation, its orientation changes between a built-up orientation and a folded orientation. When in the formed position, a lower front and rear imaginary surface, which is a surface that can be imagined as the interior dimensions of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box-like shape formed in the storage space. When in the folded position, the lower front and rear imaginary surfaces face each other with left and right imaginary surfaces, which are imaginary surfaces that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a portion of a pair of left and right side surfaces of a box-like shape formed in the storage space. the result, It is possible to stabilize the forming posture and the folding posture.

[0020] The lower front and rear partial structure may be separated into two pieces. The box structure according to an embodiment of the present invention includes: The lower front and rear partial structure has a right lower front and rear partial structure and a left lower front and rear partial structure that are separated into left and right parts when viewed from the front, a right edge of the right lower front and rear partial structure is connected to the right partial structure so as to be swingable about a third right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right lower front and rear partial structure swings around the third right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right lower front and rear partial structure is in the formed posture, a right lower front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the right lower front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the right partial structure and that can partition the right side of the box-like shape formed in the storage space. a left edge of the left lower front and rear partial structure is connected to the left partial structure so as to be swingable about a third left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left lower front and rear partial structure swings around the third left vertical rotation axis, its posture changes between a built-up posture and a folded posture; The left lower front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the left lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the left lower front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure and can partition the left side of the box-shaped structure formed in the storage space. In the configuration of the above embodiment, the lower front and rear partial structure is divided into a right lower front and rear partial structure and a left lower front and rear partial structure when viewed from the front. The right edge of the right lower front and rear partial structure is connected to the right partial structure so as to be able to swing freely about a third right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure. When the right lower front and rear substructure swings around the third right vertical rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a right lower front and rear imaginary surface, which is a surface that can be imagined as the interior dimension of the right lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space. When in the folded position, the right lower front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the right partial structure and that can partition the right side of the box-like shape formed in the storage space. The left edge of the left lower front and rear partial structure is connected to the left partial structure so as to be able to swing freely about a third left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure. When the left lower front and rear substructure pivots about the third left vertical rotation axis, its posture changes between a built-up posture and a folded posture. A left lower front and rear imaginary surface, which is a surface that can be imagined as the interior dimension of the left lower front and rear partial structure, defines at least a portion of a pair of front and rear side surfaces of a box shape formed in the storage space. When in the folded position, the left lower front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure and can partition the left side of the box-shaped structure formed in the storage space. As a result, the forming position and the folding position can be stabilized.

[0021] The left and right substructures may each have a U-shaped structure. The box structure according to an embodiment of the present invention includes: The front portion structure has an upper front portion structure that can define at least a part of the front side surface of a box-shaped shape formed in the storage space, The upper front structure has a right upper front structure and a left upper front structure that are separated into left and right parts when viewed from the front, a right edge of the right upper front section structure is connected to the right section structure so as to be pivotable about a first right front vertical rotation axis; a left edge of the left upper front section structure is pivotally connected to the left section structure about a first left front vertical rotation axis; When viewed from the front, the left edge of the right upper front structure and the right edge of the left upper front structure are connected to each other so as to be able to swing freely around a second front vertical rotation axis, which is a vertical rotation axis; The rear portion structure has an upper rear portion structure that can define at least a part of the rear side of a box-shaped shape formed in the storage space, The upper rear portion structure has a right upper rear portion structure and a left upper rear portion structure that are separated into left and right parts when viewed from the front, a right edge of the right upper rear partial structure is connected to the right partial structure so as to be pivotable about a first right rear vertical rotation axis; a left edge of the left upper rear partial structure is pivotally connected to the left partial structure about a first left rear vertical rotation axis; When viewed from the front, the left edge of the right upper rear portion structure and the right edge of the left upper rear portion structure are connected to each other so as to be able to swing freely around a second rear vertical rotation axis, which is a vertical rotation axis; the first right front vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane, the first left front vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane, the first right rear vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane, the first left rear vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane, In the configuration of the above embodiment, the front portion structure has an upper front portion structure that can define at least a part of the front side surface of the box-like shape formed in the storage space. The upper front structure is divided into a right upper front structure and a left upper front structure when viewed from the front. The right edge of the right upper front section structure is pivotally connected to the right section structure about a first right front vertical axis of rotation. The left edge of the left upper front section structure is pivotally connected to the left section structure about a first left front vertical axis of rotation. When viewed from the front, the left edge of the right upper front structure and the right edge of the left upper front structure are connected to be able to swing freely around a second front vertical rotation axis, which is a vertical rotation axis. The rear portion structure has an upper rear portion structure that can define at least a part of the rear side of a box-shaped shape formed in the storage space, The upper rear portion structure has a right upper rear portion structure and a left upper rear portion structure that are separated into left and right parts when viewed from the front, a right edge of the right upper rear partial structure is connected to the right partial structure so as to be pivotable about a first right rear vertical rotation axis; a left edge of the left upper rear partial structure is pivotally connected to the left partial structure about a first left rear vertical rotation axis; When viewed from the front, the left edge of the right upper rear portion structure and the right edge of the left upper rear portion structure are connected to each other so as to be able to swing freely around a second rear vertical rotation axis, which is a vertical rotation axis; The first right front vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane. The first left front vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane. The first right rear vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane. The first left rear vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane. As a result, even if the width in the left-right direction is longer than the width in the front-rear direction, the forming posture can be stabilized.

[0022] In the folded state, the upper front portion structure and the upper rear portion structure may be arranged side by side, separated into left and right. The box structure according to an embodiment of the present invention includes: When the right upper front portion structure swings about the first right front vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front portion structure is in the formed posture, a right upper front imaginary plane, which is a plane that can be imagined on the inside dimension of the right upper front portion structure, defines at least a part of the front side of the box-shaped shape formed in the storage space, When in the folded posture, the right upper front imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, When the left upper front portion structure swings about the first left front vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left-side upper front portion structure is in the formed posture, a left-side upper front imaginary surface, which is a surface that can be imagined on the inside dimension of the left-side upper front portion structure, defines at least a part of the front side surface of the box-like shape formed in the storage space, When in the folded posture, the left upper front imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, When the right upper rear portion structure swings about the first right rear vertical rotation axis, its posture changes between a built posture and a folded posture; When the storage space is in the formed position, a left upper rear imaginary plane, which is a plane that can be imagined on the inside dimension of the right upper rear portion structure, defines at least a part of the rear side of the box-shaped shape formed in the storage space, When in the folded posture, the right upper rear imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, When the left upper rear portion structure swings around the first left rear vertical rotation axis, its posture changes between a built posture and a folded posture; When the left upper rear portion structure is in the formed posture, a left upper rear imaginary plane, which is a plane that can be imagined on the inside dimension of the left upper rear portion structure, defines at least a part of the rear side of the box-shaped shape formed in the storage space, When in the folded posture, the left upper rear imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, In the folded position, a structure in which the right upper front structure and the left upper front structure are stacked laterally and a combined structure in which the right upper rear structure and the left upper rear structure are stacked laterally are arranged adjacent to each other in the left-right direction. In the configuration of the above embodiment, When the right upper front section structure pivots about the first right front vertical rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a right upper front imaginary plane, which is a plane that can be imagined on the inside dimensions of the right upper front portion structure, defines at least a part of the front side of the box-like shape formed in the storage space. When in the folded position, the right upper front imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined as the inside dimensions of the right partial structure and can partition the right side surface of the box-shaped shape formed in the storage space. When the left upper front section structure pivots about the first left front vertical rotation axis, its position changes between a built-up position and a folded position. When in the formed position, a left upper front imaginary plane, which is a plane that can be imagined on the inside dimensions of the left upper front portion structure, defines at least a part of the front side of the box-like shape formed in the storage space. When in the folded position, the left upper front imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined as the interior dimensions of the left partial structure and that can partition the left side of the box-shaped shape formed in the storage space. When the right upper rear portion structure pivots about the first right rear vertical rotation axis, its position changes between a built-up position and a folded position. When in the formed position, a left upper rear imaginary plane, which is a plane that can be imagined on the inside dimension of the right upper rear portion structure, defines at least a part of the rear side of the box-like shape formed in the storage space. When in the folded position, the right upper rear imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure and that can partition the right side surface of the box-like shape formed in the storage space. When the left upper rear portion structure pivots about the first left rear vertical rotation axis, its position changes between a built-up position and a folded position. When in the formed position, a left upper rear imaginary surface, which is a surface that can be imagined on the inside dimension of the left upper rear portion structure, defines at least a part of the rear side surface of the box-like shape formed in the storage space. When in the folded position, the left upper rear imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and that can partition the left side of the box-like shape formed in the storage space. In the folded position, a structure in which the right upper front structure and the left upper front structure are stacked laterally and a combined structure in which the right upper rear structure and the left upper rear structure are stacked laterally are arranged adjacent to each other in the left-right direction. As a result, the folding property can be stabilized.

[0023] The upper front portion structure and the upper rear portion structure may be offset from each other laterally. The box structure according to an embodiment of the present invention includes: Either right front horizontal distance > left front horizontal distance and right rear horizontal distance < left rear horizontal distance, or right front horizontal distance < left front horizontal distance and right rear horizontal distance > left rear horizontal distance. In the configuration of the above embodiment, Either right front horizontal distance > left front horizontal distance and right rear horizontal distance < left rear horizontal distance, or right front horizontal distance < left front horizontal distance and right rear horizontal distance > left rear horizontal distance. As a result, the posture can be smoothly changed between the formed posture and the folded posture.

[0024] The lengths of the two left and right pieces of the upper front and rear partial structure may be different. The box structure according to an embodiment of the present invention includes: When in a formation posture, The horizontal distance in the left-right direction between the first right front vertical rotation axis and the second front vertical rotation axis is referred to as a right front horizontal separation distance, The horizontal distance in the left-right direction between the first left front vertical rotation axis and the second front vertical rotation axis is referred to as a left front horizontal separation distance, The horizontal distance in the left-right direction between the first right rear vertical rotation axis and the second rear vertical rotation axis is referred to as a right rear horizontal separation distance, When the horizontal distance in the left-right direction between the first left rear vertical rotation axis and the second rear vertical rotation axis is referred to as the left rear horizontal separation distance, the right front horizontal separation distance > the left front horizontal separation distance and the right rear horizontal separation distance < the left rear horizontal separation distance, or Either the right front horizontal separation distance < the left front horizontal separation distance and the right rear horizontal separation distance > the left rear horizontal separation distance. In the configuration of the above embodiment, When in a formation posture, The horizontal distance in the left-right direction between the first right front vertical rotation axis and the second front vertical rotation axis is referred to as a right front horizontal separation distance, The horizontal distance in the left-right direction between the first left front vertical rotation axis and the second front vertical rotation axis is referred to as a left front horizontal separation distance, The horizontal distance in the left-right direction between the first right rear vertical rotation axis and the second rear vertical rotation axis is referred to as a right rear horizontal separation distance, The horizontal distance in the left-right direction between the first left rear vertical rotation axis and the second rear vertical rotation axis is referred to as a left rear horizontal separation distance. the right front horizontal separation distance > the left front horizontal separation distance and the right rear horizontal separation distance < the left rear horizontal separation distance, or the right front horizontal separation distance < the left front horizontal separation distance and the right rear horizontal separation distance > the left rear horizontal separation distance; As a result, the posture can be smoothly changed between the formed posture and the folded posture.

[0025] The two left and right pieces of the bottom structure may be shifted forward or backward. In the box structure according to an embodiment of the present invention, the bottom portion structure has a pair of left and right bottom portion structures, that is, a right bottom portion structure and a left bottom portion structure, a right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; a left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; The left edge of the right bottom portion structure and the right edge of the left bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis extending along the front-rear direction, The right bottom partial structure and the left bottom partial structure are relatively horizontally movable in the front-to-rear direction along a fifth horizontal rotation axis. In the configuration of the above embodiment, The bottom portion structure has a pair of left and right bottom portion structures, that is, a right bottom portion structure and a left bottom portion structure. The right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis. The left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis. The left edge of the right bottom partial structure and the right edge of the left bottom partial structure are connected to be able to swing freely around a fifth horizontal rotation axis extending along the front-to-rear direction. The right bottom partial structure and the left bottom partial structure are relatively horizontally movable in the front-to-rear direction along a fifth horizontal rotation axis. As a result, the posture can be smoothly changed between the formed posture and the folded posture.

[0026] The lower front and rear substructure may swing about a horizontal axis of rotation. The box structure according to an embodiment of the present invention includes: The lower edge of the lower front and rear partial structure is connected to the bottom partial structure so as to be swingable about a sixth horizontal rotation axis, which is a rotation axis; When the lower front and rear partial structure swings around the sixth horizontal rotation axis, its posture changes between a built-up posture and a folded posture; When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the lower front and rear imaginary planes face each other and face the floor imaginary plane, which is an imaginary plane that can be imagined as the inside dimensions of the bottom portion structure and can partition at least a portion of the bottom surface of the box-shaped shape formed in the storage space. In the configuration of the above embodiment, The lower edge of the lower front and rear part structure is connected to the bottom part structure so as to be able to swing freely around a sixth horizontal rotation axis, which is a rotation axis. When the lower front and rear substructure swings about the sixth horizontal rotation axis, its posture changes between a built-up posture and a folded posture. When in the formed position, a lower front and rear imaginary surface, which is a surface that can be imagined as the interior dimensions of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box-like shape formed in the storage space. When in the folded position, the lower front and rear imaginary planes face each other and face the floor imaginary plane, which is an imaginary plane that can be imagined as the inside dimensions of the bottom portion structure and can partition at least a portion of the bottom surface of the box-shaped shape formed in the storage space. As a result, different types of folding positions can be stabilized. [Effects of the Invention]

[0027] As described above, the box structure according to the present invention has the following effects due to its configuration. The box structure is made up of a left and right partial structure that can partition a pair of left and right side surfaces of a box-shaped shape formed in the storage space, a front and rear partial structure that can partition the pair of front and rear side surfaces, and a bottom partial structure that can partition the bottom surface, the front and rear partial structure is made up of an upper front and rear partial structure that can partition a portion of the pair of front and rear side surfaces and a lower front and rear partial structure located below it, the left and right edges of the upper front and rear partial structure are connected to the right and left partial structures, respectively, the left and right edges of the upper front and rear partial structure are expandable and contractible in the left and right directions, and the edge of the lower front and rear partial structure is connected to the left and right partial structures or the bottom partial structure so as to be swingable around a rotation axis, and the lower front and rear imaginary surface can change its position between a formed position that partitions at least a portion of the pair of front and rear side surfaces of the box-shaped shape formed in the storage space and a folded position in which the lower front and rear imaginary surface faces each other with the left and right imaginary surface, so that the position of the storage space can be changed between a formed position in which it is box-shaped and a folded position in which it shrinks in the left and right directions.

[0028] When in the forming posture, the lower front and rear partial structures and the upper front and rear partial structures can be detachably connected, so that the forming posture can be stabilized.

[0029] The upper front and rear partial structure may be divided into two pieces, left and right. The right and left upper front and rear partial structures of the upper front and rear partial structure are connected to each other at their edges so as to be swingable about a second vertical rotation axis, The right upper front and rear partial structure and the left upper front and rear partial structure are connected at their left and right edges to the right partial structure and the left partial structure so as to be swingable about a first right vertical rotation axis and a first left vertical rotation axis, When the storage space is in the formed position, a right upper front-rear imaginary plane and a left upper front-rear imaginary plane, which are planes that can be imagined on the inside dimensions of the right upper front-rear partial structure and the left upper front-rear partial structure, define at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the right upper front-rear imaginary plane and the left upper front-rear imaginary plane can be imagined as the interior dimensions of the right partial structure and the left partial structure, and the right imaginary plane and the left imaginary plane are imaginary planes that can partition a pair of left and right sides of a box-like shape formed in the storage space, and the planes are made to face each other.Therefore, the position can be changed between the formed position in which the storage space is box-shaped and the folded position in which it is reduced in the left-right direction, and the formed position and the folded position can be stabilized.

[0030] The upper front and rear partial structure may be divided into three pieces. The pair of right and left upper front and rear partial structures, the right upper front and rear partial structure and the left upper front and rear partial structure, are pivotally connected to the left and right edges of the central upper front and rear partial structure located therebetween via a second vertical rotation shaft; The right upper front and rear partial structure and the left upper front and rear partial structure are connected at their left and right edges to the left and right edges of the right partial structure and the left partial structure, and the pair of right upper front and rear partial structures and the left upper front and rear partial structure are connected at their left and right edges to the left and right edges of the central upper front and rear partial structure located therebetween via a second vertical rotation shaft, the right upper front and rear partial structure and the left upper front and rear partial structure are connected at their left and right edges to the right partial structure and the left partial structure so as to be swingable about a first right vertical rotation axis and a first left vertical rotation axis, When the storage space is in the formed position, a right upper front-rear imaginary plane and a left upper front-rear imaginary plane, which are planes that can be imagined on the inside dimensions of the right upper front-rear partial structure and the left upper front-rear partial structure, define at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the right upper front-rear imaginary surface and the left upper front-rear imaginary surface can be imagined as the interior dimensions of the right partial structure and the left partial structure, and the right imaginary surface and the left imaginary surface are imaginary surfaces that can partition a pair of left and right sides of the box-like shape formed in the storage space, and the surfaces are made to face each other.Therefore, the position can be changed between the formed position in which the storage space is box-shaped and the folded position in which it shrinks in the left-right direction, and the formed position and the folded position can be stabilized.

[0031] The upper front and rear substructure may move up and down. In the forming posture, when the upper front-rear partial structure moves downward, it is connected to the lower front-rear partial structure, and when the upper front-rear partial structure moves upward, it is disconnected from the lower front-rear partial structure, so that the forming posture can be easily stabilized.

[0032] The first biasing mechanism biases the left upper front and rear partial structure and the right upper front and rear partial structure from the formed position to the folded position, so that the position can be changed from the formed position to the folded position with little force.

[0033] The second biasing mechanism biases the right bottom portion structure and the left bottom portion structure from the formed position to the folded position, so that the position can be changed from the formed position to the folded position with little force.

[0034] The bottom portion structure may be one piece or two pieces. The left or right edge of the bottom partial structure is connected to the right or left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, and when in the formed position, the bottom imaginary surface of the bottom partial structure defines at least a portion of the bottom surface of the box-shaped shape formed in the storage space, and when in the folded position, the bottom imaginary surface faces the left and right imaginary surfaces of the left and right partial structures, thereby stabilizing the folded position.

[0035] The bottom portion structure may be in two pieces. The right and left bottom structures of the bottom structure are connected to each other so as to be able to swing freely around a fifth horizontal axis of rotation. The right edge of the right bottom partial structure and the left edge of the left bottom partial structure are each connected to a pair of right and left partial structures so as to be swingable about a fourth horizontal rotation axis; When in the formed posture, a right bottom imaginary surface and a left bottom imaginary surface that can be imagined on the inside dimensions of the right bottom partial structure and the left bottom partial structure define at least a part of the bottom surface, When in the folded position, the right side bottom imaginary surface and the left side bottom imaginary surface are arranged to face each other, with the right imaginary surface that can be imagined as the inside dimension of the right partial structure and the left imaginary surface that can be imagined as the inside dimension of the left partial structure, so that the formed position and the folded position can be stabilized.

[0036] The upper front and rear substructure may move up and down to avoid the bottom substructure. When in the folded position, The upper front-rear partial structure is able to move upward along the axial direction of the first vertical rotation axis to a position where the bottom of the upper front-rear partial structure is higher than the top of the bottom partial structure, thereby preventing interference between the upper front-rear partial structure and the bottom partial structure when changing positions between the formed position and the folded position.

[0037] The bottom portion structure may be divided into front and rear portions. The bottom portion structure has one bottom portion structure and another bottom portion structure that are separated and arranged in the front-rear direction, The one bottom portion structure has a right one bottom portion structure and a left one bottom portion structure that are separated into left and right, the right-side bottom portion structure and the left-side bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis; the right one bottom partial structure and the left one bottom partial structure are connected to the right partial structure and the left partial structure so as to be swingable about a fourth right horizontal rotation axis and a fourth left horizontal rotation axis, respectively; When the storage space is in the formed position, a right-side bottom imaginary surface and a left-side bottom imaginary surface that can be imagined based on the inside dimensions of the right-side bottom portion structure and the left-side bottom portion structure define at least a portion of the bottom surface of the box-shaped shape formed in the storage space, When in the folded posture, the right side one bottom imaginary plane and the left side one bottom imaginary plane face each other with right imaginary planes and left imaginary planes that can be imagined based on the interior dimensions of the right partial structure and the left partial structure, The left edge or the right edge of the other bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When in the formed position, the other bottom imaginary surface that can be imagined on the inside of the other bottom part structure defines a part of the bottom surface of the box-shaped shape formed in the storage space. When in the folded position, the other bottom imaginary plane faces an imaginary plane that can be imagined as the inside dimension of the right or left partial structure, so that the formed position can be stabilized.

[0038] The lower front and rear substructure may swing about a vertical axis of rotation. a right edge or a left edge of the lower front and rear partial structure is connected to at least one of the right partial structure or the left partial structure so as to be swingable about a third vertical rotation axis; When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary plane that can be imagined as an inner dimension of the lower front and rear partial structure defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the lower front and rear imaginary planes are arranged to face each other with imaginary left and right planes that can be imagined as the inside dimensions of the right partial structure or the left partial structure, so that the formed position and the folded position can be stabilized.

[0039] The lower front and rear partial structure may be separated into two pieces. The lower front and rear partial structure has a right lower front and rear partial structure and a left lower front and rear partial structure that are separated into left and right parts when viewed from the front, a right edge of the right lower front and rear partial structure is connected to the right partial structure so as to be pivotable about a third right vertical rotation axis; When the right lower front and rear partial structure is in the formed posture, a right lower front and rear imaginary plane that can be imagined based on the inside dimensions of the right lower front and rear partial structure defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right lower front and rear imaginary plane faces a right imaginary plane that can be imagined as an internal dimension of the right partial structure, a left edge of the left lower front and rear partial structure is connected to the left partial structure so as to be pivotable about a third left vertical rotation axis; When the left lower front and rear partial structure is in the formed posture, a left lower front and rear imaginary plane that can be imagined based on the inside dimensions of the left lower front and rear partial structure defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the left lower front and rear imaginary plane faces a left imaginary plane that can be imagined as the inside dimension of the left partial structure, so that the formed position and the folded position can be stabilized.

[0040] The left and right substructures may each have a U-shaped structure. The upper front portion structure defines at least a portion of the front side of the box-shaped storage space, including the upper edge; The upper front structure is divided into a right upper front structure and a left upper front structure when viewed from the front, the right edge of the right upper front partial structure and the left edge of the left upper front partial structure are respectively connected to the right partial structure and the left partial structure so as to be freely movable about a first right front vertical rotation axis and a first left front vertical rotation axis, and the left edge of the right upper front partial structure and the right edge of the left upper front partial structure are connected to be freely swingable about a second front vertical rotation axis, The upper rear portion structure defines at least a portion of a rear side surface of a box-shaped structure formed in the storage space, The upper rear portion structure is divided into a right upper rear portion structure and a left upper rear portion structure when viewed from the front, a right edge of the right upper rear partial structure and a left edge of the left upper rear partial structure are respectively connected to the right partial structure and the left partial structure so as to be freely movable about a first right rear vertical rotation axis and a first left rear vertical rotation axis, and a left edge of the right upper rear partial structure and a right edge of the left upper rear partial structure are connected to be freely swingable about a second rear vertical rotation axis, the first right front vertical rotation axis is located at a position separated by a right front horizontal distance to the left of the position of the right imaginary plane, the first left front vertical rotation axis is located at a position separated by a left front horizontal distance to the right of the position of the left imaginary plane, the first right rear vertical rotation axis is located at a position separated by a right rear horizontal distance to the left of the position of the right imaginary plane, Since the first left rear vertical rotation axis is located at a position separated by the left rear horizontal distance to the right of the position of the left imaginary plane, the forming posture can be stabilized even when the left-right direction is longer than the front-to-rear direction.

[0041] In the folded state, the upper front portion structure and the upper rear portion structure may be arranged side by side, separated into left and right. When the storage space is in the formed position, a right upper front imaginary plane that can be imagined based on the inside dimensions of the right upper front partial structure, a left upper front imaginary plane that can be imagined based on the inside dimensions of the left upper front partial structure, a left upper rear imaginary plane that can be imagined based on the inside dimensions of the right upper rear partial structure, and a left upper rear imaginary plane that can be imagined based on the inside dimensions of the left upper rear partial structure each define front and rear sides of a box shape that is formed in the storage space, In the folded position, the structure in which the right upper front structure and the left upper front structure are stacked horizontally and the combined structure in which the right upper rear structure and the left upper rear structure are stacked horizontally are arranged side by side in the left-right direction, with the right imaginary plane and the left imaginary plane facing each other, thereby stabilizing the folding ability.

[0042] The upper front portion structure and the upper rear portion structure may be offset from each other laterally. Since either right front horizontal distance > left front horizontal distance and right rear horizontal distance < left rear horizontal distance, or right front horizontal distance < left front horizontal distance and right rear horizontal distance > left rear horizontal distance, the posture can be smoothly changed between the formed posture and the folded posture.

[0043] The lengths of the two left and right pieces of the upper front and rear partial structure may be different. the right front horizontal separation distance > the left front horizontal separation distance and the right rear horizontal separation distance < the left rear horizontal separation distance, or the right front horizontal separation distance < the left front horizontal separation distance and the right rear horizontal separation distance > the left rear horizontal separation distance;

[0044] The two left and right pieces of the bottom structure may be shifted forward or backward. Since the right bottom portion structure and the left bottom portion structure are designed to be relatively horizontally movable in the front-to-back direction along the fifth horizontal rotation axis, the position can be smoothly changed between the formed position and the folded position.

[0045] The lower front and rear substructure may swing about a horizontal axis of rotation. When in the folded position, the lower front and rear imaginary planes are arranged to face each other and to face the floor imaginary plane, which is an imaginary plane that can be imagined as the inside dimensions of the bottom portion structure and can partition at least a part of the bottom surface of the box-shaped shape formed in the storage space, so that different types of folding positions can be stabilized. Therefore, it is possible to provide a box structure that can be folded compactly for storage with a simple structure and can be expanded from the compactly folded state. [Brief explanation of the drawings]

[0046] [Figure 1] 1 is an overall perspective view of a box structure according to a first embodiment of the present invention; [Figure 2] 1 is a structural explanatory diagram of a first box structure according to a first embodiment of the present invention. [Figure 3] FIG. 2 is a structural explanatory diagram of a second box structure according to the first embodiment of the present invention. [Figure 4] FIG. 2 is a structural explanatory diagram of a third box structure according to the first embodiment of the present invention. [Figure 5] FIG. 10 is a structural explanatory diagram of a fourth box structure according to the first embodiment of the present invention. [Figure 6] FIG. 10 is a structural explanatory diagram of a fifth box structure according to the first embodiment of the present invention. [Figure 7] FIG. 10 is a structural explanatory diagram of a sixth box structure according to the first embodiment of the present invention. [Figure 8] FIG. 10 is a structural explanatory diagram of a seventh box structure according to the first embodiment of the present invention. [Figure 9] FIG. 10 is a structural explanatory diagram of the eighth box structure according to the first embodiment of the present invention. [Figure 10]FIG. 10 is a structural explanatory diagram of the ninth box structure according to the first embodiment of the present invention. [Figure 11] 1 is a structural explanatory diagram of a box structure No. 10 according to a first embodiment of the present invention. FIG. [Figure 12] FIG. 11 is a structural explanatory diagram of the box structure No. 11 according to the first embodiment of the present invention. [Figure 13] FIG. 12 is a structural explanatory diagram of a box structure No. 12 according to the first embodiment of the present invention. [Figure 14] FIG. 10 is an overall perspective view of a box structure according to a second embodiment of the present invention. [Figure 15] FIG. 10 is a structural explanatory diagram of a first box structure according to a second embodiment of the present invention. [Figure 16] FIG. 10 is a structural explanatory diagram of a second box structure according to a second embodiment of the present invention. [Figure 17] FIG. 10 is a structural explanatory diagram of a third box structure according to the second embodiment of the present invention. [Figure 18] 1 is a structural explanatory diagram of a first connecting structure of a box structure according to an embodiment of the present invention. [Figure 19] FIG. 10 is a structural explanatory diagram of a second connecting structure of the box structure according to the embodiment of the present invention. [Figure 20] FIG. 10 is a structural explanatory diagram of a third connecting structure of a box structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0047] Hereinafter, embodiments of the present invention will be described. A box structure according to an embodiment of the present invention is for storing an object in a storage space. Hereinafter, a box structure according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of a box structure according to a first embodiment of the present invention. FIG. 2 is a structural explanatory diagram of a box structure No. 1 according to the first embodiment of the present invention. FIG. 3 is a structural explanatory diagram of a box structure No. 2 according to the first embodiment of the present invention. FIG. 4 is a structural explanatory diagram of a box structure No. 3 according to the first embodiment of the present invention. FIG. 5 is a structural explanatory diagram of a box structure No. 4 according to the first embodiment of the present invention. FIG. 6 is a structural explanatory diagram of a box structure No. 5 according to the first embodiment of the present invention. FIG. 7 is a structural explanatory diagram of a box structure No. 6 according to the first embodiment of the present invention. FIG. 8 is a structural explanatory diagram of a box structure No. 7 according to the first embodiment of the present invention. FIG. 9 is a structural explanatory diagram of a box structure No. 8 according to the first embodiment of the present invention. FIG. 10 is a structural explanatory diagram of a box structure No. 9 according to the first embodiment of the present invention. FIG. 11 is a structural explanatory diagram of a box structure No. 10 according to the first embodiment of the present invention. FIG. 12 is a structural explanatory diagram of a box structure No. 11 according to the first embodiment of the present invention. FIG. 13 is a structural explanatory diagram of a box structure No. 12 according to the first embodiment of the present invention. Fig. 14 is an overall perspective view of a box structure according to a second embodiment of the present invention. Fig. 15 is a structural explanatory diagram of a first box structure according to the second embodiment of the present invention. Fig. 16 is a structural explanatory diagram of a second box structure according to the second embodiment of the present invention. Fig. 17 is a structural explanatory diagram of a third box structure according to the second embodiment of the present invention. Fig. 18 is a structural explanatory diagram of a first connecting structure of a box structure according to an embodiment of the present invention. Fig. 19 is a structural explanatory diagram of a second connecting structure of a box structure according to an embodiment of the present invention. Fig. 20 is a structural explanatory diagram of a third connecting structure of a box structure according to an embodiment of the present invention.

[0048] The box structure according to the embodiment of the present invention can partition a virtual storage space W and can change its position between a built-in position and a folded position. The forming posture is a posture in which a box shape is formed in the storage space W, which is made up of a pair of front and rear side surfaces Pf, Pb, a pair of left and right side surfaces Qr, Ql, and a bottom surface D. The folded position is a position in which the storage space W is reduced in the left-right direction by being folded.

[0049] The box structure according to the embodiment of the present invention is composed of front and rear partial structures 100, left and right partial structures 200, and a bottom partial structure 300. The box structure according to the embodiment of the present invention is composed of front and rear partial structures 100, left and right partial structures 200, a bottom partial structure 300, and wheels 400. The front and rear partial structures 100 have a front partial structure 100f and a rear partial structure 100b that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces Pf, Pb of a box shape formed in the storage space W. The left and right partial structures 200 have a right partial structure 200r and a left partial structure 200l that are a pair of left and right partial structures that can partition a pair of left and right side surfaces Qr, Ql of the box shape formed in the storage space W. The bottom portion structure 300 is a portion structure that can partition the box-shaped bottom surface D formed in the storage space W. The wheels 400 are wheels that support the bottom portion structure 300 from below. The wheels may have a caster structure.

[0050] In the formed posture, an imaginary surface can be imagined that is a surface that can partition each face of the box-shaped shape formed in the storage space according to the interior dimensions of the front and rear partial structures 100, the left and right partial structures 200, and the bottom partial structure 300. An imaginary surface that can be imagined as the interior dimensions of the front and rear partial structure 100 and that can divide the front and rear sides of the box-shaped configuration formed in the storage space is referred to as a front and rear imaginary surface S10. Imaginary surfaces that can be imagined as the interior dimensions of the left and right partial structures 200 and that can partition at least a portion of the left and right side surfaces of the box-shaped configuration formed in the storage space are referred to as left and right imaginary surfaces S20. An imaginary surface that can be imagined based on the interior dimensions of the bottom portion structure 300 and that can define at least a portion of the bottom surface of the box-shaped configuration formed in the storage space is referred to as a bottom imaginary surface S30.

[0051] The front and rear partial structure 100 may be composed of a pair of upper and lower front and rear partial structures 110 and 120 . An imaginary surface that can be imagined as the interior dimensions of the upper front and rear partial structure 110 and that can define at least a portion of the front and rear side surfaces of the box-like shape formed in the storage space is referred to as an upper front and rear imaginary surface S11. An imaginary surface that can be imagined as the interior dimensions of the lower front and rear partial structure 120 and that can define at least a portion of the front and rear sides of the box-shaped configuration formed in the storage space is referred to as a lower front and rear imaginary surface S12.

[0052] The upper front and rear partial structure 110 may be composed of a pair of right and left upper front and rear partial structures 110r and 110l. An imaginary surface that can be imagined as the interior dimensions of the right upper front and rear partial structure 110r and that can partition at least a portion of the front and rear sides Pf, Pb of the box-like shape formed in the storage space W is referred to as the right upper front and rear imaginary surface S11r. An imaginary surface that can be imagined as the interior dimensions of the left upper front and rear partial structure 110l and that can partition at least a portion of the front and rear sides Pf, Pb of the box-like shape formed in the storage space W is referred to as the left upper front and rear imaginary surface S11l. The right upper front and rear partial structure 110r is composed of a pair of front and rear right upper front partial structure S11rf and right upper rear partial structure S11rb. An imaginary surface that can be imagined as the interior dimensions of the right upper front portion structure 110rf and that can define at least a part of the front side surface Pf of the box-like shape formed in the storage space W is referred to as a right upper front imaginary surface S11rf. An imaginary surface that can be imagined as the interior dimensions of the right upper rear portion structure 110rb and that can define at least a part of the rear side surface Pb of the box-like shape formed in the storage space W is referred to as a right upper rear imaginary surface S11rb. The left upper front and rear partial structure 110l is composed of a pair of front and rear left upper front and rear partial structures 110lf and 110lb. An imaginary surface that can be imagined as the interior dimensions of the left upper front portion structure 110lf and that can define at least a part of the front side surface Pf of the box-like shape formed in the storage space W is referred to as the left upper front imaginary surface S11lf. An imaginary surface that can be imagined based on the interior dimensions of the left upper rear portion structure 110lb and that can define at least a portion of the rear side surface Pb of the box-like shape formed in the storage space W is referred to as the left upper rear imaginary surface S11lf.

[0053] The lower front and rear partial structure 120 may be configured with a pair of right and left lower front and rear partial structures S120r and S120l. An imaginary surface that can be imagined as the interior dimensions of the right lower front and rear partial structure 120r and that can partition at least a portion of the front and rear side surfaces Pf, Pb of the box shape formed in the storage space W is referred to as the right lower front and rear imaginary surface S12r. An imaginary surface that can be imagined as the interior dimensions of the left lower front and rear partial structure 120l and that can partition at least a portion of the front and rear sides Pf, Pb of the box-like shape formed in the storage space W is referred to as the left lower front and rear imaginary surface S12l. The right lower front and rear partial structure 120r is composed of a pair of right lower front partial structure 120rf and right lower rear partial structure 120rb. An imaginary plane that can be imagined as the interior dimensions of the right lower front portion structure 120rf and that can define at least a part of the front side of the box-shaped structure formed in the storage space W is referred to as a right lower front imaginary plane S12rf. An imaginary plane that can be imagined as the interior dimensions of the right lower rear portion structure 120rb and that can define at least a part of the rear side of the box-shaped structure formed in the storage space is referred to as a right lower rear imaginary plane S12rb. The left lower front and rear partial structure 120l is composed of a pair of front and rear left lower front and rear partial structures 120lf and 120lb. An imaginary plane that can be imagined as the interior dimensions of the left lower front portion structure 120lf and that can define at least a portion of the front side of the box-shaped structure formed in the storage space is referred to as a left lower front imaginary plane S12lf. An imaginary plane that can be imagined as the interior dimensions of the left lower rear portion structure 120lb and that can define at least a portion of the rear side of the box-shaped structure formed in the storage space is referred to as the left lower rear imaginary plane S12lb.

[0054] The left and right partial structure 200 may be configured as a pair of right and left partial structures 200r and 200l. The imaginary planes that define at least a portion of the left and right side surfaces of the box-like shape formed by the left and right partial structures 200 in the storage space W are referred to as left and right imaginary planes S20. An imaginary plane that defines at least a part of the right side surface of the box-like shape that the right partial structure 200r forms in the storage space W is referred to as a right imaginary plane S20r. An imaginary plane that defines at least a part of the left side surface of the box-like shape formed by the left partial structure 200l in the storage space W is referred to as a left imaginary plane S20l.

[0055] The bottom portion structure 300 may be constructed in one piece. The imaginary plane that defines the bottom surface of the box-like shape formed by the bottom portion structure 300 in the storage space W is referred to as a bottom imaginary plane S30.

[0056] The bottom portion structure 300 may be configured as a pair of right and left bottom portions 300r and 300l. The imaginary surface that defines at least a portion of the bottom surface of the box-like shape formed by the right bottom partial structure 300r in the storage space W is referred to as a right bottom imaginary surface S30r. An imaginary plane that defines at least a portion of the bottom surface of the box-like shape formed by the left bottom partial structure 300l in the storage space W is referred to as a left bottom imaginary plane S30l.

[0057] The floor substructure 300 may be composed of a bottom substructure 310 on one hand and a floor substructure 320 on the other hand, which are arranged along the front and rear. The one bottom portion structure 310 is composed of a pair of right one bottom portion structure 310r and left one bottom portion structure 310l. The other bottom portion structure 320 is composed of a pair of right and left other bottom portion structures 320r and 320l.

[0058] A box structure according to a first embodiment of the present invention will be described below. In the box structure according to the first embodiment, the box shape formed in the storage space is formed by a pair of front and rear partial structures, a pair of left and right partial structures, and a bottom partial structure.

[0059] The box structure is made up of a front and rear partial structure 100, a lower front and rear partial structure 120, a left and right partial structure 200, and a bottom partial structure 300. The front and rear substructure 100 is composed of an upper front and rear substructure 110 and a lower front and rear substructure 120 . The upper front and rear partial structure 110 is a partial structure that can partition at least a part of a pair of front and rear side surfaces Pf, Pb of a box shape formed in the storage space W. The upper front and rear partial structure 110 may be a partial structure that can partition at least a part of the box-shaped front and rear side surfaces Pf, Pb formed in the storage space W, including the upper edges of the pair of side surfaces. The lower front and rear partial structure 120 is a partial structure that can define at least a part below the area defined by the upper front and rear partial structure 110 on the pair of front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space.

[0060] The right edge of the upper front and rear substructure 110 can be connected to the right substructure 200r, and the left edge of the upper front and rear substructure 110 can be connected to the left substructure 200l. The upper front and rear partial structure 110 is capable of expanding and contracting the distance between the right edge and the left edge in the left-right direction.

[0061] The edges of the lower front and rear partial structure 120 are connected to one of the left and right partial structures 200 or the bottom partial structure 300 so as to be able to swing freely about a rotation axis. The left and right edges of the lower front and rear partial structure 120 may be connected to the left and right partial structures 200 so as to be able to swing freely around a rotation axis. For example, the left or right edge of the lower front and rear substructure 120 is connected to the left and right substructure 200 so as to be able to swing freely around a rotation axis. The lower edge of the lower front and rear substructure 120 may be connected to the bottom substructure 300 so as to be pivotable about a rotation axis. For example, the lower edge of the lower front and rear substructure 120 may be connected to the bottom substructure 300 so as to be pivotable about a rotation axis.

[0062] When the lower front and rear substructure 120 swings around the rotation axis, the posture changes between the formed posture and the folded posture. When in the formed posture, a lower front-rear imaginary surface S120, which is a surface that can be imagined as the interior dimension of the lower front-rear partial structure 120, defines at least a part of a pair of front and rear side surfaces of the box-like shape formed in the storage space. When in the folded position, the lower front-rear imaginary plane S12 faces the left-right imaginary plane S20, which is an imaginary plane that can be imagined as the interior dimensions of the right partial structure 200r or the left partial structure 200l and can partition at least a portion of the pair of left and right side surfaces Qr, Ql of the box-like shape formed in the storage space W. As a result, the position can be changed between a forming position and a folded position.

[0063] When in the forming position, the upper front and rear partial structure 110 and the lower front and rear partial structure 120 may be detachably connectable to each other. For example, in the forming posture, the lower part of the upper front-rear partial structure 110 and the upper part of the lower front-rear partial structure 120 are detachably connected. As a result, the forming posture is stabilized.

[0064] The following describes a case where the upper front and rear partial structure 110 is separated into two pieces, left and right.

[0065] The upper front and rear partial structure 110 is composed of a pair of partial structures, a right upper front and rear partial structure 110r and a left upper front and rear partial structure 110l, which are separated into left and right parts when viewed from the front. When viewed from the front, the left edge of the right upper front-rear partial structure 110r and the right edge of the left upper front-rear partial structure 110l are connected to be able to swing freely around a second vertical rotation axis P2, which is a vertical rotation axis.

[0066] The upper front and rear section structure 110 may have a first biasing mechanism. The first biasing mechanism is a mechanism that biases the left upper front-rear partial structure 110l and the right upper front-rear partial structure 110r from the formed position to the folded position. For example, the first biasing mechanism is a helical spring provided on the connecting member that constitutes the second vertical rotation axis P2. For example, the first biasing mechanism is a helical spring provided on the connecting member that constitutes the first vertical rotation axis P1.

[0067] The bottom portion structure 300 may have a second biasing mechanism. The second biasing mechanism is a mechanism that biases the right bottom partial structure 300r and the left bottom partial structure 300l from the formed position to the folded position. For example, the second biasing mechanism is a helical spring provided on the connecting member that constitutes the fifth horizontal rotation axis P5. For example, the second biasing mechanism is a helical spring provided on the connecting member that constitutes the fourth horizontal rotation axis P4.

[0068] One of the upper front and rear substructure 110 or the bottom substructure 300 may have a biasing mechanism, while the other does not.

[0069] The right edge of the right upper front / rear partial structure 110r is connected to the right partial structure 200r so as to be able to swing freely about a first right vertical rotation axis P1r, which is a vertical rotation axis. When the right upper front and rear partial structure 110r swings about the first right vertical rotation axis P1r, its posture changes between the built-up posture and the folded posture. When in the formed posture, the right upper front and rear imaginary surface S11r, which is a surface that can be imagined as the interior dimension of the right upper front and rear partial structure 110r, defines at least a portion of the pair of front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space W. When in the folded position, the right upper front / rear imaginary surface S11r faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-shaped structure formed in the storage space.

[0070] The left edge of the left upper front-rear partial structure 110l is connected to the left partial structure 200l so as to be able to swing freely about a first left vertical rotation axis P1l, which is a vertical rotation axis. When the left upper front and rear substructure pivots about the first left vertical axis of rotation, the position changes between the formed position and the folded position. When in the formed posture, a left upper front-rear imaginary surface S11l, which is a surface that can be imagined as the interior dimension of the left upper front-rear partial structure 110l, defines at least a part of the front and rear side surfaces of the box-like shape formed in the storage space. When in the folded position, the left upper front / rear imaginary plane S11l faces the left imaginary plane S20l, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure 200l and can partition the left side surface Ql of the box-like shape formed in the storage space W.

[0071] The following describes a case where the upper front and rear partial structure 110 is separated into three left and right pieces.

[0072] The upper front-rear partial structure 110 has a right upper front-rear partial structure 110r and a left upper front-rear partial structure 110l which are separated into left and right parts when viewed from the front, and a central upper front-rear partial structure 110m located between the right upper front-rear partial structure 110r and the left upper front-rear partial structure 110l. The left edge of the right upper front-rear partial structure 110r and the right edge of the central upper front-rear partial structure 110m are connected to be able to swing freely around a second right vertical rotation axis P2r, which is a vertical rotation axis. The right edge of the left upper front-rear partial structure 110l and the left edge of the central upper front-rear partial structure 110m are connected to be able to swing freely around a second left vertical rotation axis P2l, which is a vertical rotation axis.

[0073] The right edge of the right upper front / rear partial structure 110r is connected to the right partial structure 200r so as to be able to swing freely about a first right vertical rotation axis P1r, which is a vertical rotation axis. When the right upper front and rear partial structure 110r swings about the first right vertical rotation axis P1r, its posture changes between the built-up posture and the folded posture. When in the formed posture, a right upper front / rear imaginary surface S11r, which is a surface that can be imagined as the interior dimension of the right upper front / rear partial structure 110r, defines at least a part of the front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space W. When in the folded position, the right upper front / rear imaginary surface 110r faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-like shape formed in the storage space W.

[0074] The left edge of the left upper front-rear partial structure 110l is connected to the left partial structure 200l so as to be able to swing freely about a first left vertical rotation axis P1l, which is a vertical rotation axis. When the left upper front and rear partial structure 110l swings about the first left vertical rotation axis P1l, its posture changes between the built-up posture and the folded posture. When in the formed posture, a left upper front and rear imaginary surface S11l, which is a surface that can be imagined as the interior dimensions of the left upper front and rear partial structure 110l, defines at least a part of the front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space. When in the folded position, the left upper front / rear imaginary plane 110l faces the left imaginary plane S20l, which is an imaginary plane that can be imagined as the interior dimensions of the left partial structure 200l and can partition the left side surface Ql of the box-like shape formed in the storage space W.

[0075] The following describes the case where the upper front and rear partial structure 110 moves up and down. The upper front and rear substructure 110 can move up and down along the axial direction of the first vertical rotation axis P1. In the forming posture, when the upper front-rear partial structure 110 moves downward, the upper front-rear partial structure 110 and the lower front-rear partial structure 120 are connected, and when the upper front-rear partial structure 110 moves upward, the connection between the upper front-rear partial structure 110 and the lower front-rear partial structure 120 is released.

[0076] For example, the right upper front-rear partial structure 110r can move up and down along the axial direction of the first right vertical rotation axis P1r. When in the forming posture, when the right upper front-rear partial structure 110r moves downward, the right upper front-rear partial structure 110r and the right lower front-rear partial structure 120r are connected, and when the right upper front-rear partial structure 110r moves upward, the connection between the right upper front-rear partial structure 110r and the right lower front-rear partial structure 120r is released. The left upper front-rear partial structure 110l can move up and down along the axial direction of the first left vertical rotation axis P1l. When in the forming posture, when the left upper front-rear partial structure 110r moves downward, the left upper front-rear partial structure 110l and the left lower front-rear partial structure 120l are connected, and when the left upper front-rear partial structure 110l moves upward, the connection between the left upper front-rear partial structure 110l and the left lower front-rear partial structure 120l is released.

[0077] An example of the structure of the bottom portion structure 300 will be described below.

[0078] The left edge or the right edge of the bottom partial structure 300 is connected to at least one of the right partial structure 200r or the left partial structure 200l so as to be able to swing freely about a fourth horizontal rotation axis, which is a horizontal rotation axis, as a center P4. When the bottom section structure 300 pivots about the fourth horizontal axis of rotation P4, the position changes between the formed position and the folded position. When in the formed posture, a bottom imaginary surface S30, which is a surface that can be imagined as the interior dimension of the bottom portion structure 300, defines at least a part of the box-shaped bottom surface D formed in the storage space. When in the folded position, the bottom virtual surface S30 faces the left and right virtual surfaces S20, which are virtual surfaces that can partition at least a portion of the pair of left and right side surfaces Qr, Ql of the box-shaped structure formed in the storage space W of the right partial structure 200r or the left partial structure 200l.

[0079] The following describes a case where the floor substructure 300 is separated into two pieces, left and right. The bottom portion structure 300 has a right bottom portion structure 300r and a left bottom portion structure 300l which are separated into left and right portions when viewed from the front. When viewed from the front, the left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis P5, which is a horizontal rotation axis.

[0080] The right edge of the right bottom partial structure 300r is connected to the right partial structure 200r so as to be able to swing freely about a fourth right horizontal rotation axis P4r, which is a horizontal rotation axis. When the right bottom partial structure 300r pivots about the fourth right horizontal rotation axis P4r, its posture changes between the built-up posture and the folded posture. When in the formed posture, a right bottom imaginary surface S30r, which is a surface that can be imagined on the inside dimensions of the right bottom partial structure 300r, defines at least a part of the box-shaped bottom surface D formed in the storage space W. When in the folded position, the right bottom imaginary surface 300r faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-shaped form formed in the storage space W.

[0081] The left edge of the left bottom partial structure 300l is connected to the left partial structure 200l so as to be able to swing freely about a fourth left horizontal rotation axis P4l, which is a horizontal rotation axis. When the left bottom partial structure 300l pivots about the fourth left horizontal rotation axis P4l, its position changes between the formed position and the folded position. When in the formed posture, a left bottom imaginary surface S30r, which is a surface that can be imagined on the inside dimension of the left bottom portion structure 300l, defines at least a part of the box-shaped bottom surface D formed in the storage space W, When in the folded position, the left bottom imaginary surface 300l faces the left imaginary surface S20l, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure 200l and can partition the left side surface Ql of the box-shaped shape formed in the storage space W.

[0082] Next, a case where the upper front and rear partial structure 110 moves upward to avoid the bottom partial structure 300 will be described.

[0083] When in the folded position, the upper front and rear partial structure 110 can move upward along the axial direction of the first vertical rotation axis P1 to a position where the bottom of the upper front and rear partial structure 110 is higher than the top of the bottom partial structure 300. In this way, physical interference between the upper front and rear substructure 110 and the bottom substructure 300 can be prevented when the position is changed between the formed position and the folded position.

[0084] Next, a case where the bottom portion structure 300 is separated into two or three pieces in the front-rear direction will be described.

[0085] The bottom portion structure 300 has a plurality of portion structures, namely, a first bottom portion structure 310 and an second bottom portion structure 320, which are separated and arranged in the front-rear direction. For example, one bottom portion structure 310 and one bottom portion structure 320 are arranged side by side in the front-to-rear direction. For example, one other bottom portion structure 320, one one bottom portion structure 310 and one other bottom portion structure 320 are arranged in the front-to-rear direction.

[0086] First, the structure of the bottom portion structure 310 will be described. The one bottom portion structure 310 is divided into a right one bottom portion structure 310r and a left one bottom portion structure 310l when viewed from the front. The left edge of the right one bottom partial structure 310r and the right edge of the left one bottom partial structure 310l are connected to be able to swing freely around a fifth horizontal rotation axis P5, which is a horizontal rotation axis.

[0087] The right edge of the right one bottom partial structure 310r is connected to the right partial structure 200r so as to be able to swing freely about a fourth right horizontal rotation axis P4r, which is a horizontal rotation axis. When the right one bottom portion structure 310r swings about the fourth right horizontal rotation axis P4r, its posture changes between the formed posture and the folded posture. When in the formed posture, a right side bottom imaginary surface S21r, which is a surface that can be imagined on the inside dimension of the right side bottom portion structure 310r, defines at least a part of the box-shaped bottom surface D formed in the storage space W. When in the folded position, the right side bottom imaginary surface S21r faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-shaped form formed in the storage space W.

[0088] The left edge of the left one bottom partial structure 310l is connected to the left partial structure 200l so as to be able to swing freely about a fourth left horizontal rotation axis P4l, which is a horizontal rotation axis. When the left one bottom portion structure 310l swings about the fourth left horizontal rotation axis P4l, the posture thereof changes between the formed posture and the folded posture. When in the formed posture, the left side bottom imaginary surface S21l, which is a surface that can be imagined on the inside dimensions of the left side bottom portion structure 310l, defines at least a part of the box-shaped bottom surface D formed in the storage space W. When in the folded position, the left side bottom imaginary surface S31l faces the left imaginary surface S20l, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure 200l and can partition the left side surface Ql of the box-shaped shape formed in the storage space W.

[0089] Next, the structure of the other bottom portion structure 320 will be described. The other garden section 320 may be a one-piece structure or a pair of two-piece structures. On the other hand, the left edge or the right edge of the bottom partial structure 320 is connected to at least one of the right partial structure 200r or the left partial structure 200l so as to be able to swing freely about a fourth horizontal rotation axis P4, which is a horizontal rotation axis.

[0090] On the other hand, when the bottom portion structure 320 pivots about the fourth horizontal rotation axis P4, the position changes between the formed position and the folded position. When in the formed posture, the other bottom imaginary surface S32, which is a surface that can be imagined on the inside dimensions of the other bottom portion structure 320, defines at least a part of the box-shaped bottom surface D formed in the storage space W. When in the folded position, the other bottom imaginary surface S32 faces an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r or the left partial structure 200l and can partition at least a portion of the pair of left and right side surfaces Qr, Ql of the box-shaped structure formed in the storage space W.

[0091] When in the forming position, the one bottom portion structure 310 and the other bottom portion structure 320 may be detachably connectable to each other. In that way, the base structure 300 is stable when in the forming position.

[0092] Next, the case where the lower front and rear partial structure 120 is one piece or two pieces will be described. The lower front and rear partial structure 120 may be a one-piece structure or a two-piece structure consisting of a pair of left and right pieces.

[0093] The right edge or the left edge of the lower front / rear partial structure 120 is connected to at least one of the right partial structure 200r or the left partial structure 200l so as to be swingable about a third vertical rotation axis P3, which is a vertical rotation axis.

[0094] When the lower front and rear substructure 120 pivots about the third vertical rotation axis P3, the posture thereof changes between the formed posture and the folded posture. When in the formed posture, a lower front-rear imaginary surface S12, which is a surface that can be imagined as the interior dimension of the lower front-rear partial structure 120, defines at least a part of a pair of front and rear side surfaces Pf, Pb of the box shape formed in the storage space W. When in the folded position, the lower front-rear imaginary plane S12 faces the left-right imaginary plane S20, which is an imaginary plane that can be imagined as the interior dimensions of the right partial structure 200r or the left partial structure 200l and can partition at least a portion of the pair of left and right side surfaces Qr, Ql of the box-like shape formed in the storage space W.

[0095] Next, a case will be described in which the lower front and rear partial structure 120 is a pair of two pieces, left and right, and the left and right edges are connected to the left partial structure and the right partial structure so as to be able to swing freely.

[0096] The lower front and rear partial structure 120 is divided into a right lower front and rear partial structure 120r and a left lower front and rear partial structure 120l when viewed from the front.

[0097] The right edge of the right lower front / rear partial structure 120r is connected to the right partial structure 200r so as to be able to swing freely about a third right vertical rotation axis P3r, which is a vertical rotation axis. When the right lower front and rear partial structure 120r swings about the third right vertical rotation axis P3r, its posture changes between the built-up posture and the folded posture. When in the formed posture, a right lower front and rear imaginary surface S12r, which is a surface that can be imagined as the inside dimension of the right lower front and rear partial structure 120r, defines at least a portion of a pair of front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space W. When in the folded position, the right lower front / rear imaginary surface S12r faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-like shape formed in the storage space W.

[0098] The left edge of the left lower front-rear partial structure 120l is connected to the left partial structure 200l so as to be able to swing freely about a third left vertical rotation axis P3l, which is a vertical rotation axis. When the left lower front and rear substructure 120l swings about the third left vertical rotation axis P3l, its posture changes between the formed posture and the folded posture. The left lower front / rear imaginary surface S12l, which is a surface that can be imagined based on the inside dimensions of the left lower front / rear partial structure 120l, defines at least a portion of the pair of front and rear side surfaces Pf, Pb of the box-shaped structure formed in the storage space W, and when in the folded position, the left lower front / rear imaginary surface 120l faces the left imaginary surface S12l, which is a virtual surface that can be imagined based on the inside dimensions of the left partial structure 200l and can define the left side surface Ql of the box-shaped structure formed in the storage space W.

[0099] Next, a case where the lower front and rear substructure 120 is pivotally connected at its lower edge to the bottom substructure will be described. The lower edge of the lower front and rear partial structure 120 is connected to the bottom partial structure 300 so as to be able to swing freely around a sixth rotation axis P6, which is a rotation axis. For example, the lower front-rear partial structure 120 is composed of a right lower front-rear partial structure 120r and a left lower front-rear partial structure 120l, and the lower edge of the right lower front-rear partial structure 120r is connected to the right bottom partial structure 300r so as to be freely swingable around a sixth horizontal rotation axis, which is a horizontal rotation axis, and the lower edge of the left lower front-rear partial structure 120l is connected to the left bottom partial structure 300l so as to be freely swingable around the sixth horizontal rotation axis, which is also a horizontal rotation axis.

[0100] When the lower front and rear partial structure 120 swings around the sixth rotation axis P6, the posture thereof changes between the built-in posture and the folded posture. When in the formed posture, a lower front-rear imaginary surface S12, which is a surface that can be imagined as the interior dimension of the lower front-rear partial structure 120, defines at least a part of a pair of front and rear side surfaces Pf of the box shape formed in the storage space W. When in the folded position, the lower front-rear imaginary plane S12 faces the bottom imaginary plane S30, which is an imaginary plane that can be imagined based on the internal dimensions of the bottom portion structure 300 and can partition at least a portion of the box-shaped bottom surface D formed in the storage space W. Furthermore, the lower front-rear imaginary surface S12 faces the left-right imaginary surface S20, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r or the left partial structure 200l and can partition at least a portion of a pair of left and right side surfaces Qr, Ql of the box-shaped structure formed in the storage space W.

[0101] Next, a box structure according to a second embodiment of the present invention will be described. FIG. 13 is a conceptual diagram of a box structure according to the second embodiment of the present invention. The box structure according to the second embodiment has a pair of right and left partial structures, each of which has a U-shaped structure that opens toward the center when viewed from above. The box structure according to the second embodiment can also be combined with the box structure according to the first embodiment.

[0102] The front section structure 100f has an upper front section structure 110f that can define at least a part of the front side surface Pf of the box-like shape formed in the storage space. For example, the front section structure 100f has an upper front section structure 110f that can define at least a portion including the upper edge of the front side of a box-like shape formed in the storage space. The upper front structure 110f is divided into a right upper front structure 110rf and a left upper front structure 110lf when viewed from the front. The right edge of the right upper front partial structure 110rf is connected to the right partial structure 200r so as to be able to swing freely about a first right front vertical rotation axis P1r. The left edge of the left upper front partial structure 110lf is connected to the left partial structure 200l so as to be pivotable about a first left front vertical rotation axis P1l. When viewed from the front, the left edge of the right upper front partial structure 120rf and the right edge of the left upper front partial structure 120lf are connected to be able to swing freely around a second front vertical rotation axis P2, which is a vertical rotation axis.

[0103] The rear portion structure 100b has an upper rear portion structure 110b that can define at least a part of the rear side surface Pb of the box-like shape formed in the storage space W. For example, the rear portion structure 100b has an upper rear portion structure 110b that can define at least a portion of the box-shaped rear side surface Pb formed in the storage space W, including the upper edge of the rear side surface Pb. The upper rear partial structure 110b is divided into a right upper rear partial structure 110rb and a left upper rear partial structure 110lb when viewed from the front. The left edge of the right upper rear partial structure 110rb and the right edge of the left upper rear partial structure 110lb are connected to be swingable about a second rear vertical rotation axis P1b, which is a vertical rotation axis. The right edge of the right upper rear partial structure 110rb is connected to the right partial structure 200r so as to be able to swing freely about a first right rear vertical rotation axis P1r. The left edge of the left upper rear partial structure 110lb is pivotally connected to the left partial structure 200l about a first left rear vertical rotation axis P1l.

[0104] The front portion structure 100f may be divided into two pieces, an upper piece and an lower piece. The front substructure 100f may be composed of an upper front substructure 110f and a lower front substructure 120f. The lower front partial structure 120f defines an area below the area defined by the upper front partial structure 110f on the front side surface Pf of the box-like shape formed in the storage space. The lower front structure 120f has a right lower front structure 120rf and a left lower front structure 120lf which are separated into left and right parts when viewed from the front. The left edge of the right lower rear partial structure 120rb and the right edge of the left lower rear partial structure 120lb are not connected. The right edge of the right lower front partial structure 120rf is connected to the right partial structure 200r so as to be able to swing freely about a third right front vertical rotation axis P3rf. The left edge of the left lower front partial structure 120lb is pivotally connected to the left partial structure 200l about a third left front vertical rotation axis P3lf.

[0105] The rear portion structure 100b may be divided into two pieces, an upper piece and a lower piece. The rear partial structure 100b may be composed of an upper rear partial structure 110b and a lower rear partial structure 120b. The lower rear partial structure 120b defines an area below the portion defined by the upper rear partial structure 110b on the rear side surface Pb of the box-like shape formed in the storage space. The lower rear partial structure 110b has a right lower rear partial structure 120rbf and a left lower rear partial structure 120lb which are separated into left and right parts when viewed from the front. The left edge of the right lower rear partial structure 120rb and the right edge of the left lower rear partial structure 120lb are not connected. The right edge of the right lower rear partial structure 120rb is connected to the right partial structure 200r so as to be pivotable about a third right rear vertical rotation axis P3rb. The left edge of the left lower rear partial structure 120lb is pivotally connected to the left partial structure 200l about a third left rear vertical rotation axis P3lb.

[0106] The first right front vertical rotation axis Prf is located at a position a predetermined horizontal distance Hrf to the left of the position of the right imaginary plane S20r. The first left front vertical rotation axis P1lf is located at a position separated by a predetermined horizontal distance Hlf to the right from the position of the left imaginary plane S20l. The first right rear vertical rotation axis P1rb is located at a position separated to the left of the position of the right imaginary plane S20r by a predetermined horizontal distance Hrb. The first left rear vertical rotation axis P1lb is located at a position separated by a left rear horizontal distance Hlb, which is a predetermined horizontal distance, to the right of the position of the left imaginary plane S20l.

[0107] Next, the structure in which the upper front portion structure 110f and the upper rear portion structure 110b are each a pair of two pieces, left and right, will be described.

[0108] When the right upper front portion structure 110rf swings about the first right front vertical rotation axis P1r, its posture changes between the built-up posture and the folded posture. When in the formed posture, a right upper front imaginary plane, which is a plane that can be imagined on the inside dimensions of the right upper front portion structure 110rf, defines at least a part of the front side surface Pf of the storage space W. When in the folded position, the right upper front imaginary surface S11rf faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-shaped shape formed in the storage space.

[0109] When the left upper front portion structure 110lf swings about the first left front vertical rotation axis P1l, the posture thereof changes between the formed posture and the folded posture. When in the formed posture, a left upper front imaginary surface S11lf, which is a surface that can be imagined on the inside dimensions of the left upper front portion structure 110lf, defines at least a part of the front side surface Pf of the box-like shape formed in the storage space. When in the folded position, the left upper front imaginary surface 110lf faces the left imaginary surface S20l, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure 200l and can partition the left side surface Ql of the box-like shape formed in the storage space.

[0110] When the right upper rear portion structure 110rb swings about the first right rear vertical rotation axis P1r, the posture thereof changes between the built-up posture and the folded posture. In the formed posture, a left upper rear imaginary surface S11lb, which is a surface that can be imagined on the inside dimensions of the right upper rear partial structure 110rb, defines at least a part of the rear side surface Pb of the box-like shape formed in the storage space. When in the folded position, the right upper rear imaginary surface S11rb faces the right imaginary surface S20r, which is an imaginary surface that can be imagined as the interior dimensions of the right partial structure 200r and can partition the right side surface Qr of the box-shaped configuration formed in the storage space.

[0111] When the left upper rear portion structure 110lb swings about the first left rear vertical rotation axis P1l, the posture thereof changes between the built posture and the folded posture. When in the formed posture, a left upper rear imaginary surface S11lb, which is a surface that can be imagined on the inside dimensions of the left upper rear partial structure 110lb, defines at least a part of the rear side surface Pb of the box-like shape formed in the storage space. When in the folded position, the left upper rear imaginary surface 110lb faces the left imaginary surface S20l, which is an imaginary surface that can be imagined as the interior dimensions of the left partial structure 200l and can partition the left side surface Ql of the box-like shape formed in the storage space W.

[0112] In the folded position, a structure in which the right upper front structure 110rf and the left upper front structure 110lf are stacked horizontally and a combined structure in which the right upper rear structure 110rb and the left upper rear structure 110lb are stacked horizontally are arranged adjacent to each other in the left-right direction. For example, there may be play in the structure that allows the right upper front structure 110rf or the left upper front structure 110lf to pivot freely. For example, there may be play in the structure that allows the right upper rear partial structure 110rb or the left upper rear partial structure 110lb to pivot freely.

[0113] Next, a case where the upper front structure and the upper rear structure are misaligned in the left-right direction when viewed from the front will be described.

[0114] Either right front horizontal distance Hrf>left front horizontal distance Hlf and right rear horizontal distance Hrb<left rear horizontal distance Hlb, or right front horizontal distance Hrf<left front horizontal distance Hlf and right rear horizontal distance Hrb>left rear horizontal distance Hlb. As a result, it is possible to easily select a structure that can suppress physical interference between the upper front partial structure and the upper rear partial structure when changing the position between the formed position and the folded position.

[0115] Next, the length of the right upper front structure and the left upper front structure are different. A case where the left-right length of the right upper rear portion structure and the left-right length of the left upper rear portion structure arranged side by side are different will be described. When in a formation posture, The horizontal distance in the left-right direction between the first right front vertical rotation axis P1rf and the second front vertical rotation axis P2f is referred to as a right front horizontal separation distance Lrf. The horizontal distance in the left-right direction between the first left front vertical rotation axis P1lf and the second front vertical rotation axis P2f is referred to as a left front horizontal separation distance Llf. The horizontal distance in the left-right direction between the first right rear vertical rotation axis P1rb and the second rear vertical rotation axis P2b is referred to as a right rear horizontal separation distance Lrb. The horizontal distance in the left-right direction between the first left rear vertical rotation axis P1lb and the second rear vertical rotation axis P1b is referred to as the left rear horizontal separation distance Llb.

[0116] Right front horizontal distance Lrf > left front horizontal distance Llf and right rear horizontal distance Lrb < left rear horizontal distance Llb, or Either the right front horizontal separation distance Lrf<the left front horizontal separation distance Llb and the right rear horizontal separation distance Lrb>the left rear horizontal separation distance Llb. As a result, it is possible to easily select a structure that can suppress physical interference between the upper front partial structure and the upper rear partial structure when changing the position between the formed position and the folded position.

[0117] The following describes a case where the bottom portion structure is a pair of left and right pieces that can slide relatively forward and backward. The bottom portion structure 300 has a pair of left and right bottom portion structures, a right bottom portion structure 300r and a left bottom portion structure 300l. The right edge of the right bottom partial structure 300r is connected to the right partial structure 200r so as to be able to swing freely about a fourth right horizontal rotation axis P4r, which is a horizontal rotation axis. The left edge of the left bottom partial structure 300l is connected to the left partial structure 200l so as to be able to swing freely about a fourth left horizontal rotation axis P4l, which is a horizontal rotation axis. The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis P5 extending along the front-rear direction. The right bottom partial structure 300r and the left bottom partial structure 300l are relatively horizontally movable in the front-to-rear direction along the fifth horizontal rotation axis P5. As a result, it is possible to easily select a structure that can suppress physical interference between the upper front partial structure and the upper rear partial structure when changing the position between the formed position and the folded position.

[0118] The structure of the box body will be described below with reference to the drawings, using specific examples of the structure. In the figure, for ease of understanding, the imaginary planes assumed for the internal dimensions of each substructure are shown in the formed position, folded position, and intermediate positions that transition between these positions (the same applies below). First, a box structure according to a first embodiment of the present invention will be described with reference to the drawings.

[0119] FIG. 2 is a structural explanatory diagram of a first box structure according to the first embodiment of the present invention. The box structure has a front and rear partial structure 100 that is separated into two left and right pieces, and a bottom partial structure 300 that is separated into two left and right pieces. The front and rear substructure 100 is composed of a right front and rear substructure 100r and a left front and rear substructure 100l. The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0120] The left edge of the right front / rear partial structure 100r and the right edge of the left front / rear partial structure 100l are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the right front and rear partial structure 100r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left front and rear partial structure 100l and the left partial structure 200l are connected to each other so as to be able to swing freely about a first vertical rotation axis P1.

[0121] The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are not connected. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0122] Figure 2(A) shows that when in the formed posture, the storage space is box-shaped, with a right front / rear imaginary surface S10r and a left front / rear imaginary surface S10l defining the front and rear side surfaces Pf, Pb of the box shape formed in the storage space W, a right imaginary surface Sr and a left imaginary surface Sl defining a pair of left and right side surfaces Qr, Ql of the box shape formed in the storage space W, and a bottom imaginary surface S30 defining the bottom surface D of the box shape formed in the storage space W. Figure 2(B) shows how, when changing from the formed position to the folded position, the right bottom partial structure 300r and the left bottom partial structure 300l are swung around a pair of fourth horizontal rotation axes P4 on the left and right, and then the storage space W is compressed in the left-right direction. Figure 2(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the right front-rear imaginary surface S10r and the left front-rear imaginary surface S10l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other toward the right imaginary surface S20r and the left imaginary surface S20l.

[0123] FIG. 3 is a structural explanatory diagram of a second box structure according to the first embodiment of the present invention. The box structure has a structure in which the upper part of the front and rear partial structure 100 is divided into two left and right pieces, the lower part of the front and rear partial structure 100 is divided into two left and right pieces, and the bottom partial structure 300 is divided into two left and right pieces. The front and rear substructure 100 is composed of a right upper front and rear substructure 110r, a left upper front and rear substructure 110l, a right lower front and rear substructure 120r, and a left lower front and rear substructure 120l. The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0124] When in the folded position, the bottoms of the right upper front and rear partial structure 110r and the left upper front and rear partial structure 110l are located above the tops of the left and right partial structures 200.

[0125] The left edge of the right upper front-rear partial structure 110r and the right edge of the left upper front-rear partial structure 110l are connected to be able to swing freely around a second vertical rotation axis P2. The right edge of the right upper front-rear partial structure 110r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left upper front-rear partial structure 110l and the left partial structure 200l are connected to be able to swing freely about a first vertical rotation axis P1.

[0126] The left edge of the right lower front and rear partial structure 120r and the right edge of the left lower front and rear partial structure 120l are not connected. The right edge of the right lower front-rear partial structure 120r and the right partial structure 200r are connected to be able to swing freely about a third vertical rotation axis P3. The left edge of the left lower front-rear partial structure 120l and the left partial structure 200l are connected to be able to swing freely about a third vertical rotation axis P3.

[0127] The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0128] Figure 3(A) shows that when in the formed posture, the storage space has a box-like shape, and the upper right front-rear imaginary surface S11r, the upper left front-rear imaginary surface S11l, the lower right front-rear imaginary surface S12r, and the lower left front-rear imaginary surface S12l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary surface S30 defines the bottom surface D of the box shape formed in the storage space W. FIG. 3(B) shows that, when the folding posture is changed from the folded posture to the folded posture, the right lower front-rear imaginary plane S12r and the left lower front-rear imaginary plane S12l are swung around the third vertical rotation axis P3, and then, The figure shows the right upper front-to-back imaginary surface S11r and the left upper front-to-back imaginary surface S11l swinging around the first vertical rotation axis P1, and the right bottom partial structure 300r and the left bottom partial structure 300l swinging around a pair of left and right fourth horizontal rotation axes P4, thereby shrinking the storage space W in the left-to-right direction. Figure 3(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the upper right front-rear imaginary surface S11r and the upper left front-rear imaginary surface S11l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, the lower right front-rear imaginary surface S12r and the lower left front-rear imaginary surface S12l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other toward the right imaginary surface S20r and the left imaginary surface S20l.

[0129] FIG. 4 is a structural explanatory diagram of a third box structure according to the first embodiment of the present invention. The box structure has a structure in which the upper part of the front and rear partial structure 100 is divided into three pieces, the lower part of the front and rear partial structure 100 is divided into two pieces, and the bottom partial structure 300 is divided into two pieces, left and right. The front and rear partial structure 100 is composed of a right upper front and rear partial structure 110r, a central upper front and rear partial structure 110m, a left upper front and rear partial structure 110l, a right lower front and rear partial structure 120r, and a left lower front and rear partial structure 120l. The central upper front and rear partial structure 110m is sandwiched between the right upper front and rear partial structure 110r and the left upper front and rear partial structure 110l. The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0130] When in the folded position, the bottom of the central upper front and rear partial structure 110m is located above the top of the left and right partial structures 200.

[0131] The left edge of the right upper front-rear partial structure 110r and the right edge of the central upper front-rear partial structure 110m are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the left upper front-rear partial structure 110l and the left edge of the central upper front-rear partial structure 110m are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the right upper front-rear partial structure 110r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left upper front-rear partial structure 110l and the left partial structure 200l are connected to be able to swing freely about a first vertical rotation axis P1.

[0132] The left edge of the right lower front and rear partial structure 120r and the right edge of the left lower front and rear partial structure 120l are not connected. The right edge of the right lower front-rear partial structure 120r and the right partial structure 200r are connected to be able to swing freely about a third vertical rotation axis P3. The left edge of the left lower front-rear partial structure 120l and the left partial structure 200l are connected to be able to swing freely about a third vertical rotation axis P3.

[0133] The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0134] Figure 4(A) shows that when in the formed posture, the storage space has a box-like shape, and the upper right front-rear imaginary surface S11r, the upper central front-rear imaginary surface S11m, the upper left front-rear imaginary surface S11l, the lower right front-rear imaginary surface S12r, and the lower left front-rear imaginary surface S12l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary surface S30 defines the bottom surface D of the box shape formed in the storage space W. Figure 4(B) shows that when changing from the formed posture to the folded posture, the lower right front-rear imaginary plane S12r and the lower left front-rear imaginary plane S12l swing around the third vertical rotation axis P3, then the upper right front-rear imaginary plane S11r and the upper central front-rear imaginary plane S11m swing around the second vertical rotation axis, the upper left front-rear imaginary plane S11l and the upper central front-rear imaginary plane S11m swing around the second vertical rotation axis, the upper right front-rear imaginary plane S11r and the upper left front-rear imaginary plane S11l each swing around the first vertical rotation axis P1, and the right bottom partial structure 300r and the left bottom partial structure 300l swing around a pair of left and right fourth horizontal rotation axes P4, thereby shrinking the storage space W in the left-right direction. Figure 4(C) shows that when in the folded posture, the storage space W shrinks in the left-right direction, and the upper right front-rear imaginary surface S11r and the upper left front-rear imaginary surface S11l face each other with the right imaginary surface S20r and the left imaginary surface S20l, the lower right front-rear imaginary surface S12r and the lower left front-rear imaginary surface S12l face each other with the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other with the right imaginary surface S20r and the left imaginary surface S20l.

[0135] FIG. 5 is a structural explanatory diagram of a fourth box structure according to the first embodiment of the present invention. The box structure has a front and rear structure 100 that is divided into three pieces, and a bottom structure 300 that is divided into two pieces, left and right. The front and rear partial structures 100 are composed of a right front and rear partial structure 100r, a central front and rear partial structure 100m, and a left front and rear partial structure 100l. A central front-rear partial structure 100m is sandwiched between a right front-rear partial structure 100r and a left front-rear partial structure 100l. The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0136] When in the folded position, the bottom of the central front and rear partial structure 100m is located above the top of the left and right partial structures 200. A notch is provided in the lower part so that the right front and left front partial structure 100r and 100l do not physically interfere with the right partial structure 200r and the left partial structure 200l when changing from the formed posture to the folded posture.

[0137] The left edge of the right front / rear partial structure 100r and the right edge of the central front / rear partial structure 100m are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the left front-rear partial structure 100l and the left edge of the central front-rear partial structure 100m are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the right front and rear partial structure 100r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left front and rear partial structure 100l and the left partial structure 200l are connected to each other so as to be able to swing freely about a first vertical rotation axis P1.

[0138] The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0139] Figure 5(A) shows that when in the formed posture, the storage space is box-shaped, and the right front-rear imaginary plane S10r, the central front-rear imaginary plane S10m, and the left front-rear imaginary plane S10l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary plane Sr and the left imaginary plane Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary plane S30 defines the bottom surface D of the box shape formed in the storage space W. Figure 5(B) shows how, when changing from the formed posture to the folded posture, the right front-to-back imaginary plane S10r and the central front-to-back imaginary plane S10m swing around the second vertical rotation axis P2, the left front-to-back imaginary plane S10l and the central front-to-back imaginary plane S10m swing around the second vertical rotation axis P2, the right front-to-back imaginary plane S10r and the left front-to-back imaginary plane S10l each swing around the first vertical rotation axis P1, and the right bottom partial structure 300r and the left bottom partial structure 300l swing around a pair of left and right fourth horizontal rotation axes P4, so that the notches provided at the bottom of the right front-to-back imaginary plane S10r and the left front-to-back imaginary plane S10l prevent physical interference between the right front-to-back imaginary plane S10r, the left front-to-back imaginary plane S10l, the right bottom partial structure 300r, and the left bottom partial structure 300l, while shrinking the storage space W in the left-to-right direction. Figure 5(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the right front-rear imaginary surface S10r and the left front-rear imaginary surface S10l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other toward the right imaginary surface S20r and the left imaginary surface S20l.

[0140] FIG. 6 is a structural explanatory diagram of a fifth box structure according to the first embodiment of the present invention. The fifth box structure has a front and rear structure 100 that is divided into two pieces, top and bottom, and a bottom structure 300 that is divided into two pieces, left and right. The front and rear substructure 100 is composed of an upper front and rear substructure 110 and a lower front and rear substructure 120 . The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0141] When in the forming position, the upper front and rear partial structure 110 and the lower front and rear partial structure 120 are detachably connected.

[0142] One of the left and right edges of the upper front and rear partial structure 110 is connected to one of the left and right partial structures so as to be swingable about a first vertical rotation axis P1. The other of the left and right edges of the lower front and rear partial structure 120 is connected to the other of the left and right edges of the left and right partial structures so as to be swingable about a third vertical rotation axis P3.

[0143] The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0144] Figure 6(A) shows that when in the formed posture, the storage space is box-shaped, and the upper front-rear imaginary surface S11 and the lower front-rear imaginary surface S12l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary surface S30 defines the bottom surface D of the box shape formed in the storage space W. Figure 6(B) shows that when changing from the formed posture to the folded posture, the upper front-to-rear imaginary plane S11 swings around the first vertical rotation axis P1, the lower front-to-rear imaginary plane S12 swings around the third vertical rotation axis P3, and then the right side bottom partial structure 300r and the left side bottom partial structure 300l swing around a pair of left and right fourth horizontal rotation axes P4, thereby shrinking the storage space W in the left-right direction. Figure 6(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the upper front-rear imaginary surface S11 and the lower front-rear imaginary surface S12 face each other's faces toward the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other's faces toward the right imaginary surface S20r and the left imaginary surface S20l.

[0145] FIG. 7 is a structural explanatory diagram of a sixth box structure according to the first embodiment of the present invention. The box structure has a structure in which the front and rear partial structures 100 are separated into upper and lower two pieces. The front and rear substructure 100 is composed of an upper front and rear substructure 110 and a lower front and rear substructure 120 . The bottom section structure 300 is a one-piece structure. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0146] When in the forming position, the upper front and rear partial structure 110 and the lower front and rear partial structure 120 are detachably connected.

[0147] One of the left and right edges of the upper front and rear partial structure 110 is connected to one of the left and right partial structures so as to be swingable about a first vertical rotation axis P1. The other of the left and right edges of the lower front and rear partial structure 120 is connected to the other of the left and right edges of the left and right partial structures so as to be swingable about a third vertical rotation axis P3.

[0148] One of the left and right edges of the bottom partial structure 300 and the right partial structure 200r or the left partial structure 200l are connected to be able to swing freely around a fourth horizontal rotation axis P4.

[0149] Figure 7(A) shows that when in the formed posture, the storage space is box-shaped, and the upper front-rear imaginary surface S11 and the lower front-rear imaginary surface S12l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary surface S30 defines the bottom surface D of the box shape formed in the storage space W. Figure 7(B) shows that when changing from the formed posture to the folded posture, the upper front-to-rear imaginary surface S11 swings around the first vertical rotation axis P1, the lower front-to-rear imaginary surface S12 swings around the third vertical rotation axis P3, and the bottom portion structure 300 swings around a pair of left and right fourth horizontal rotation axes P4, thereby shrinking the storage space W in the left-to-right direction. Figure 7(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, the upper front-rear imaginary surface S11 and the lower front-rear imaginary surface S12 face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the bottom imaginary surface S30 faces either the right imaginary surface S20r or the left imaginary surface S20l.

[0150] FIG. 8 is a structural explanatory diagram No. 7 of the box structure No. 7 according to the first embodiment of the present invention. The box structure has a front and rear substructure 100 that is divided into two pieces, left and right, and a floor substructure that is divided into six pieces, front, back, left and right. The front and rear substructure 100 is composed of a right front and rear substructure 100r and a left front and rear substructure 100l. The bottom portion structure 300 is composed of a right side bottom portion structure 310r, a left side bottom portion structure 310l, and two pairs of a right side other bottom portion structure 320r and a left side other bottom portion structure 320l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0151] When in the folded position, there is a gap between the inner ends of the right front / rear partial structure 100r and the left front / rear partial structure 100l in the front-rear direction and the outer ends of the two sets of right side bottom virtual surfaces S31r and left side bottom virtual surfaces S31l in the front-rear direction.

[0152] The left edge of the right front / rear partial structure 100r and the right edge of the left front / rear partial structure 100l are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the right front and rear partial structure 100r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left front and rear partial structure 100l and the left partial structure 200l are connected to each other so as to be able to swing freely about a first vertical rotation axis P1.

[0153] The left edge of the right one bottom portion structure 310r and the right edge of the left one bottom portion structure 310l are connected to be able to swing freely around a fifth horizontal rotation axis P5. The right edge of the right one bottom partial structure 310r and the right partial structure 200r are connected to be able to swing freely about a fourth horizontal rotation axis P4. The right edge of the left one bottom partial structure 310l and the right partial structure 200r are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0154] The left edge of the right other bottom partial structure 320r and the right edge of the left other bottom partial structure 320l are not connected. The right edge of the right other bottom partial structure 320r and the right partial structure 200r are connected to be able to swing freely about a fourth horizontal rotation axis P4. The left edge of the left other bottom partial structure 320l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0155] Figure 8(A) shows that when in the formed posture, the storage space is box-shaped, and the right front and rear imaginary surface S10r and the left front and rear imaginary surface S10l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the right one bottom imaginary surface S31r, the left one bottom imaginary surface S31l and two pairs of the right other bottom imaginary surface S32r and the left other bottom imaginary surface S32l define the bottom surface D of the box shape formed in the storage space W. FIG. 8(B) shows that when the folding posture is changed from the folded posture, the two pairs of right and left side imaginary bottom surfaces S32r and S32l are swung around the fourth horizontal rotation axis P4, and then, The right front-rear imaginary surface S10r and the left front-rear imaginary surface S10l swing around the first vertical rotation axis P1, and the right one-side bottom imaginary surface S31r and the left one-side bottom imaginary surface S31l swing around the fourth horizontal rotation axis P4, thereby shrinking the storage space W in the left-right direction. Figure 8(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the right front-rear imaginary surface S10r and the left front-rear imaginary surface S10l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the right one bottom imaginary surface S31r and the left one bottom imaginary surface S31l and two sets of the right other bottom imaginary surface S32r and the left other bottom imaginary surface S32l face each other toward either the right imaginary surface S20r or the left imaginary surface S20l.

[0156] FIG. 9 is a structural explanatory diagram of an eighth box structure according to the first embodiment of the present invention. The box structure has a front and rear substructure 100 separated into two left and right pieces, and a floor substructure separated into two left and right pieces. The front and rear substructure 100 is composed of a right front and rear substructure 100r and a left front and rear substructure 100l. The bottom portion structure 300 is composed of a right bottom portion structure S30r and a left bottom portion structure S30l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0157] The right front-rear substructure 100r and the left front-rear substructure 100l can move up and down along a first vertical rotation axis P1. When in the folded position, the bottoms of the right front and left front and rear partial structures 100r and 100l, which have moved upward along the first vertical rotation axis P1, are positioned above the tops of the right partial structure 200r and left partial structure 200l.

[0158] The left edge of the right front / rear partial structure 100r and the right edge of the left front / rear partial structure 100l are connected to each other so as to be able to swing freely about a second vertical rotation axis P2. The right edge of the right front and rear partial structure 100r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left front and rear partial structure 100l and the left partial structure 200l are connected to each other so as to be able to swing freely about a first vertical rotation axis P1.

[0159] The left edge of the right bottom partial structure S30r and the right edge of the left bottom partial structure S30l are connected to be able to swing freely around a fifth horizontal rotation axis P5. The right edge of the right bottom partial structure S30r and the right partial structure 20r are connected to be able to swing freely about a fourth horizontal rotation axis P4. The right edge of the left bottom partial structure S30r and the left partial structure 20l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0160] Figure 9(A) shows that when in the formed posture, the storage space is box-shaped, and a right front / rear imaginary surface S10r and a left front / rear imaginary surface S10l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, a right imaginary surface Sr and a left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and a right bottom imaginary surface S30r and a left bottom imaginary surface S30l define the bottom surface D of the box shape formed in the storage space W. Figure 9(B) shows how, when changing from the formed posture to the folded posture, the right front-to-back imaginary plane S10r and the left front-to-back imaginary plane S10l move upward along the first vertical rotation axis P1, and then the right front-to-back imaginary plane S10r and the left front-to-back imaginary plane S10l swing around the first vertical rotation axis P1, and the right bottom imaginary plane S30r and the left bottom imaginary plane S30l swing around the fourth horizontal rotation axis P4, thereby shrinking the storage space W in the left-to-right direction. Figure 9(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the right front-rear imaginary surface S10r and the left front-rear imaginary surface S10l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other toward either the right imaginary surface S20r or the left imaginary surface S20l.

[0161] FIG. 10 is a structural explanatory diagram of a ninth box structure according to the first embodiment of the present invention. The box structure has a front and rear substructure 100 that is divided into four pieces, top, bottom, left and right, and a floor substructure that is divided into two pieces, left and right. The front and rear substructure 100 is composed of a right upper front and rear substructure 110r, a left upper front and rear substructure 110l, a right lower front and rear substructure 120r, and a left lower front and rear substructure 120l. The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0162] In the folded position, the right upper front and rear partial structure 110r and the left upper front and rear partial structure 110l are detachably connected, and the right lower front and rear partial structure 120r and the left lower front and rear partial structure 120l are detachably connected.

[0163] The left edge of the right upper front-rear partial structure 110r and the right edge of the left upper front-rear partial structure 110l are connected to be able to swing freely around a second vertical rotation axis P2. The right edge of the right upper front-rear partial structure 110r and the right partial structure 200r are connected to be able to swing freely about a first vertical rotation axis P1. The left edge of the left upper front-rear partial structure 110l and the left partial structure 200l are connected to be able to swing freely about a first vertical rotation axis P1.

[0164] The left edge of the right lower front and rear partial structure 120r and the right edge of the left lower front and rear partial structure 120l are not connected. The lower edge of the right lower front / rear partial structure 120r and the right bottom partial structure 300r are connected to be able to swing freely around a sixth horizontal rotation axis P6. The lower edge of the left lower front and rear partial structure 120l and the left bottom partial structure 300l are connected to each other so as to be able to swing freely about a sixth horizontal rotation axis P6.

[0165] The left edge of the right bottom partial structure 300r and the right edge of the left bottom partial structure 300l are connected to be able to swing freely around a fifth horizontal rotation axis. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0166] Figure 10(A) shows that when in the formed posture, the storage space is box-shaped, and the upper right front-rear imaginary surface S11r, the upper left front-rear imaginary surface S11l, the lower right front-rear imaginary surface S12r, and the lower left front-rear imaginary surface S12l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary surface S30 defines the bottom surface D of the box shape formed in the storage space W. FIG. 10(B) shows that, when the folding posture is changed from the folded posture to the folded posture, the right lower front-rear imaginary plane S12r and the left lower front-rear imaginary plane S12l are swung around the sixth vertical rotation axis P6, The figure shows the right upper front-to-back imaginary surface S11r and the left upper front-to-back imaginary surface S11l swinging around the first vertical rotation axis P1, and the right bottom partial structure 300r and the left bottom partial structure 300l swinging around a pair of left and right fourth horizontal rotation axes P4, thereby shrinking the storage space W in the left-to-right direction. In FIG. 10C, when the storage space W is in the folded position, the storage space W is shrunk in the left-right direction, and the right upper front-rear imaginary surface S11r and the left upper front-rear imaginary surface S11l face each other with the right imaginary surface S20r and the left imaginary surface S20l, and the right lower front-rear imaginary surface S12r and the left lower front-rear imaginary surface S12l face each other with the right upper front-rear imaginary surface S11r and the left lower front-rear imaginary surface S11l. The right side bottom virtual surface S30r and the left side bottom virtual surface S30l face each other, and the right side bottom virtual surface S20r and the left side bottom virtual surface S20l face each other, and the right side bottom virtual surface S30r and the left side bottom virtual surface S30l face each other.

[0167] FIG. 11 is a structural explanatory diagram No. 10 of a box structure No. 10 according to the first embodiment of the present invention. The box structure has a structure in which the front and rear partial structure 100 is one piece and the bottom partial structure 300 is divided into two pieces, left and right. The front and rear partial structures 100 are made up of a pair of front and rear partial structures 100 . The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0168] The front and rear partial structures 100 are detachably connected to the partial members of the right partial structure 200r or the left partial structure 200l that are not connected by the first vertical rotation axis.

[0169] An edge on one of the left and right sides of the front and rear partial structure 100 and one of the left and right partial structures 200 are connected to each other so as to be able to swing freely about a first vertical rotation axis P1.

[0170] The left edge of the right bottom partial structure 300r is not connected to the right edge of the left bottom partial structure 300l. The right edge of the right bottom partial structure 300r and the right partial structure 200r are connected to be able to swing freely around a fourth horizontal rotation axis P4. The left edge of the left bottom partial structure 300l and the left partial structure 200l are connected to be able to swing freely about a fourth horizontal rotation axis P4.

[0171] Figure 11(A) shows that when in the formed posture, the storage space is box-shaped, and front and rear imaginary planes S10 define the front and rear sides Pf, Pb of the box shape formed in the storage space W, right imaginary plane Sr and left imaginary plane Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and right bottom imaginary plane S30r and left bottom imaginary plane S30l define the bottom surface D of the box shape formed in the storage space W. Figure 11(B) shows that when changing from the formed posture to the folded posture, the right bottom imaginary surface S30r and the left bottom imaginary surface S30l swing around the fourth vertical rotation axis P4, and the front and rear partial structure 100 swings around the first vertical rotation axis P1, thereby shrinking the storage space W in the left-right direction. Figure 11(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, the front and rear imaginary planes S10 face each other toward one of the right imaginary planes S20r and left imaginary planes S20l, and the right bottom imaginary plane S30r and the left bottom imaginary plane S30l face each other toward the right imaginary plane S20r and left imaginary plane S20l.

[0172] FIG. 12 is a structural explanatory diagram of a box structure No. 11 according to the first embodiment of the present invention. The box structure has a front and rear partial structure 100 made of one piece and a bottom partial structure 300 made of one piece. The front and rear partial structures 100 are made up of a pair of front and rear partial structures 100 . The bottom substructure 300 is made up of a single substructure. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l.

[0173] The front and rear partial structures 100 are detachably connected to the partial members of the right partial structure 200r or the left partial structure 200l that are not connected by the first vertical rotation axis.

[0174] An edge on one of the left and right sides of the front and rear partial structure 100 and one of the left and right partial structures 200 are connected to each other so as to be able to swing freely about a first vertical rotation axis P1.

[0175] The edge of one of the left and right sides of the bottom partial structure 300 and one of the left and right partial structures 200 are connected to each other so as to be able to swing freely about a fourth vertical rotation axis P4.

[0176] Figure 12(A) shows that when in the formed posture, the storage space is box-shaped, and front and rear imaginary planes S10 define the front and rear sides Pf, Pb of the box shape formed in the storage space W, right imaginary plane Sr and left imaginary plane Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and bottom imaginary plane S30 defines the bottom surface D of the box shape formed in the storage space W. Figure 12(B) shows that when changing from the formed position to the folded position, the bottom virtual surface S30 swings around the fourth vertical rotation axis P4 and the front and rear partial structure 100 swings around the first vertical rotation axis P1, thereby shrinking the storage space W in the left-right direction. Figure 12(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, the front and rear imaginary surfaces S10 face each other with either the right imaginary surface S20r or the left imaginary surface S20l, and the bottom imaginary surface S30 faces each other with either the right imaginary surface S20r or the left imaginary surface S20l.

[0177] FIG. 13 illustrates an example in which the upper front and rear partial structure has a biasing structure that biases the left upper front and rear partial structure and the right upper front and rear partial structure from the formed position to the folded position. Figure 13(A) shows that when in the formed posture, the storage space is box-shaped, and the upper right front-rear imaginary surface S11r and the upper left front-rear imaginary surface S11l define the front and rear sides Pf, Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right sides Qr, Ql of the box shape formed in the storage space W, and the bottom imaginary surface S30 defines the bottom surface D of the box shape formed in the storage space W. Figure 13(B) shows that when changing from the formed posture to the folded posture, the right upper front-to-back imaginary surface S11r and the left upper front-to-back imaginary surface S11l swing around the first vertical rotation axis P1, and the right bottom partial structure 300r and the left bottom partial structure 300l swing around a pair of left and right fourth horizontal rotation axes P4, thereby shrinking the storage space W in the left-to-right direction. Figure 13(C) shows that when in the folded position, the storage space W shrinks in the left-right direction, and the upper right front-rear imaginary surface S11r and the upper left front-rear imaginary surface S11l face each other toward the right imaginary surface S20r and the left imaginary surface S20l, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l face each other toward the right imaginary surface S20r and the left imaginary surface S20l. FIG. 20 shows how the helical spring 111 biases the left upper front and rear partial structures and the right upper front and rear partial structures from the formed position to the folded position. Furthermore, when in the forming position, the bottom portion structure 300 may have a support structure that supports the right bottom portion structure 300r and the left bottom portion structure 300l from below. For example, the wheels 400 support the right and left bottom partial structures 300r and 300l from below when they are in the forming position. In this way, when the right bottom partial structure 300r and the left bottom partial structure 300l are pushed upward in the formed position, the biasing force of the biasing structure allows the structure to change from the formed position to the folded position with a light force.

[0178] Next, a specific example of a box structure according to the second embodiment of the present invention will be described with reference to the drawings.

[0179] FIG. 14 is a structural explanatory diagram of a first box structure according to the second embodiment of the present invention. The front and rear partial structure 100 is divided into four pieces, left, right, top and bottom. The lower part of the front and rear partial structure 100 is separated into two left and right pieces, and the bottom partial structure 300 is separated into two left and right pieces. The front and rear substructure 100 is composed of a right upper front substructure 110rf, a left upper front substructure 110lf, a right lower front substructure 120rf, a left lower front substructure 120lf, a right upper rear substructure 110rb, a left upper rear substructure 110lb, a right lower rear substructure 120rb, and a left lower rear substructure 120lb. The bottom portion structure 300 is composed of a right bottom portion structure 300r and a left bottom portion structure 300l. The left and right partial structure 200 is composed of a right partial structure 200r and a left partial structure 200l. The right partial structure 200r and the left partial structure 200l each have a U-shaped structure that opens toward the center when viewed from above.

[0180] The right front horizontal distance Hrf may be equal to the left front horizontal distance Hlf and the right rear horizontal distance Hrb may be equal to the left rear horizontal distance Hlb.

[0181] The right front horizontal separation distance Lrf may be equal to the left front horizontal separation distance Llf and the right rear horizontal separation distance Lrb may be equal to the left rear horizontal separation distance Llb.

[0182] Either the combination of right upper front section structure 110rf and left upper front section structure 110lf or the combination of right upper rear section structure 110rb and left upper rear section structure 110lb can move up and down along a first vertical axis of rotation. The bottom of one of the combinations that has moved upward is positioned higher than the top of the other combination.

[0183] When in the folded position, a structure in which the right upper front structure 110rf and the left upper front structure 110lf are stacked horizontally and a structure in which the right upper rear structure 110rb and the left upper rear structure 110lb are stacked horizontally are lined up next to each other in the left-right direction. For example, the right upper front structure 110rf and the left upper front structure 110lf can swing around the first vertical rotation axis P1 within a range with a predetermined play, and the right upper rear structure 110rb and the left upper rear structure 110lb can swing around the first vertical rotation axis P1 within a range with a predetermined play. In this way, the structure in which the right upper front partial structure 110rf and the left upper front partial structure 110lf are stacked side by side can be moved to one side in the left-right direction, and the structure in which the right upper rear partial structure 110rb and the left upper rear partial structure 110lb are stacked side by side can be moved to the other side in the left-right direction.

[0184] Figure 14(A) shows that in the formed posture, the storage space has a box-like shape, and the right upper front imaginary surface S11rf, the left upper front imaginary surface S11lf, the right lower front imaginary surface S12rf, and the left lower front imaginary surface S12lf define the front side surface Pf of the box shape formed in the storage space W, the right upper rear imaginary surface S11rb, the left upper rear imaginary surface S11lb, the right lower rear imaginary surface S12rb, and the left lower rear imaginary surface S12lb define the rear side surface Pb of the box shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right side surfaces Qr, Ql of the box shape formed in the storage space W, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l define the bottom surface D of the box shape formed in the storage space W. In FIG. 14(B), when changing from the formed posture to the folded posture, the right upper rear imaginary surface S11rb and the left upper rear imaginary surface S11lb move upward so that the bottom end of the combination of the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf is positioned above the top end of the combination of the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf, and the right lower front imaginary surface S12rf and the left lower front imaginary surface S12lf swing around the third vertical rotation axes P3rf and P3f, and the right lower rear imaginary surface S11rb and the left upper rear imaginary surface S11lb move upward so that the bottom end of the combination of the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf is positioned above the top end of the combination of the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf. After S12rb and the left lower rear imaginary surface S12lb swing around the third vertical rotation axis P3rb, P3lb, the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf swing around the first vertical rotation axis P1rf, P1lf, the right upper rear imaginary surface S11rb and the left upper rear imaginary surface S11lb swing around the first vertical rotation axis P1rb, P1lb, and the right one-side bottom imaginary surface S31r and the left one-side bottom imaginary surface S31l swing around the fourth horizontal rotation axis P4, thereby shrinking the storage space W in the left-right direction. Figure 14(C) shows that when in the folded posture, the storage space W shrinks in the left-right direction, and the right upper front imaginary surface S11rf, the left upper front imaginary surface S11lf, the right upper rear imaginary surface S11rb, and the left upper rear imaginary surface S11lb face each other's faces toward the right imaginary surface S20r, the right lower front imaginary surface S12rf, the left lower front imaginary surface S12lf, the right lower rear imaginary surface S12rb, and the left lower rear imaginary surface S12lb face each other's faces toward the left imaginary surface S20l, the right bottom imaginary surface S30r faces each other's faces toward the right imaginary surface S20r, and the left bottom imaginary surface S30l faces each other's faces toward the left imaginary surface S20l.

[0185] FIG. 15 is a structural explanatory diagram of a second box structure according to the second embodiment of the present invention. The main parts of the structure of Box Structure No. 2 are the same as those of Box Structure No. 1, so we will omit the explanation of the same structure and explain the differences.

[0186] The right front horizontal distance Hrf>the left front horizontal distance Hlf and the right rear horizontal distance Hrb<the left rear horizontal distance Hlb, or the right front horizontal distance Hrf<the left front horizontal distance Hlf and the right rear horizontal distance Hrb>the left rear horizontal distance Hlb. FIG. 15 shows a case where the right front horizontal distance Hrf>the left front horizontal distance Hlf and the right rear horizontal distance Hrb<the left rear horizontal distance Hlb.

[0187] The right front horizontal separation distance Lrf may be equal to the left front horizontal separation distance Llf and the right rear horizontal separation distance Lrb may be equal to the left rear horizontal separation distance Llb.

[0188] Figure 15(A) shows that in the formed posture, the storage space has a box-like shape, and the right upper front imaginary surface S11rf, the left upper front imaginary surface S11lf, the right lower front imaginary surface S12rf, and the left lower front imaginary surface S12lf define the front side surface Pf of the box-like shape formed in the storage space W, the right upper rear imaginary surface S11rb, the left upper rear imaginary surface S11lb, the right lower rear imaginary surface S12rb, and the left lower rear imaginary surface S12lb define the rear side surface Pb of the box-like shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right side surfaces Qr, Ql of the box-like shape formed in the storage space W, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l define the bottom surface D of the box-like shape formed in the storage space W. Figure 15(B) shows how, when changing from the formed posture to the folded posture, the right lower front imaginary surface S12rf and the left lower front imaginary surface S12lf swing around the third vertical rotation axis P3rf, P3lf, the right lower rear imaginary surface S12rb and the left lower rear imaginary surface S12lb swing around the third vertical rotation axis P3rb, P3lb, and then the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf swing around the first vertical rotation axis P1rf, P1lf, the right upper rear imaginary surface S11rb and the left upper rear imaginary surface S11lb swing around the first vertical rotation axis P1rb, P1lb, and the right one-side bottom imaginary surface S31r and the left one-side bottom imaginary surface S31l swing around the fourth horizontal rotation axis P4, thereby shrinking the storage space W in the left-right direction. At this time, the structure combining the right upper rear imaginary surface S11rb and the left upper rear imaginary surface S11lb and the structure combining the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf are folded without physical interference with each other. Figure 15(C) shows that when in the folded posture, the storage space W shrinks in the left-right direction, and the right upper front imaginary surface S11rf, the left upper front imaginary surface S11lf, the right upper rear imaginary surface S11rb, and the left upper rear imaginary surface S11lb face each other's faces toward the right imaginary surface S20r, the right lower front imaginary surface S12rf, the left lower front imaginary surface S12lf, the right lower rear imaginary surface S12rb, and the left lower rear imaginary surface S12lb face each other's faces toward the left imaginary surface S20l, the right bottom imaginary surface S30r faces each other's faces toward the right imaginary surface S20r, and the left bottom imaginary surface S30l faces each other's faces toward the left imaginary surface S20l.

[0189] FIG. 16 is a structural explanatory diagram of a second box structure according to the second embodiment of the present invention. The main parts of the structure of Box Structure No. 2 are the same as those of Box Structure No. 1, so we will omit the explanation of the same structure and explain the differences.

[0190] The right front horizontal separation distance Lrf is greater than the left front horizontal separation distance Llf, and the right rear horizontal separation distance Lrb is less than the left rear horizontal separation distance Llb. Alternatively, the right front horizontal separation distance Lrf<the left front horizontal separation distance Llf, and the right rear horizontal separation distance Lrb>the left rear horizontal separation distance Llb. FIG. 16 shows a case where the right front horizontal separation distance Lrf>the left front horizontal separation distance Llf and the right rear horizontal separation distance Lrb<the left rear horizontal separation distance Llb.

[0191] The right front horizontal distance Hrf may be equal to the left front horizontal distance Hlf, and the right rear horizontal distance Hrb may be equal to the left rear horizontal distance Hlb.

[0192] The right bottom partial structure 300r and the left bottom partial structure 300l are relatively horizontally movable in the front-to-rear direction along the fifth horizontal rotation axis P5.

[0193] Figure 16(A) shows that in the formed posture, the storage space has a box-like shape, and the right upper front imaginary surface S11rf, the left upper front imaginary surface S11lf, the right lower front imaginary surface S12rf, and the left lower front imaginary surface S12lf define the front side surface Pf of the box-like shape formed in the storage space W, the right upper rear imaginary surface S11rb, the left upper rear imaginary surface S11lb, the right lower rear imaginary surface S12rb, and the left lower rear imaginary surface S12lb define the rear side surface Pb of the box-like shape formed in the storage space W, the right imaginary surface Sr and the left imaginary surface Sl define a pair of left and right side surfaces Qr, Ql of the box-like shape formed in the storage space W, and the right bottom imaginary surface S30r and the left bottom imaginary surface S30l define the bottom surface D of the box-like shape formed in the storage space W. 16(B) shows that when changing from the folded posture to the folded posture, the right bottom partial structure 300r and the left bottom partial structure 300l move relatively horizontally in the front-to-rear direction along the fifth horizontal rotation axis P5, the right lower front imaginary surface S12rf and the left lower front imaginary surface S12lf swing around the third vertical rotation axes P3rf and P3lf, and the right lower rear imaginary surface S12rb and the left lower rear imaginary surface S12lb swing around the third vertical rotation axes P3rb and P3lb. After swinging in this direction, the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf swing around the first vertical rotation axes P1rf and P1lf, the right upper rear imaginary surface S11rb and the left upper rear imaginary surface S11lb swing around the first vertical rotation axes P1rb and P1lb, and the right one-side bottom imaginary surface S31r and the left one-side bottom imaginary surface S31l swing around the fourth horizontal rotation axis P4, thereby shrinking the storage space W in the left-right direction. At this time, the structure combining the right upper rear imaginary surface S11rb and the left upper rear imaginary surface S11lb and the structure combining the right upper front imaginary surface S11rf and the left upper front imaginary surface S11lf are folded without physical interference with each other. Figure 16(C) shows that when in the folded posture, the storage space W shrinks in the left-right direction, and the right upper front imaginary surface S11rf, the left upper front imaginary surface S11lf, the right upper rear imaginary surface S11rb, and the left upper rear imaginary surface S11lb face each other's faces toward the right imaginary surface S20r, the right lower front imaginary surface S12rf, the left lower front imaginary surface S12lf, the right lower rear imaginary surface S12rb, and the left lower rear imaginary surface S12lb face each other's faces toward the left imaginary surface S20l, the right bottom imaginary surface S30r faces each other's faces toward the right imaginary surface S20r, and the left bottom imaginary surface S30l faces each other's faces toward the left imaginary surface S20l.

[0194] The connecting structure, which is a structure for connecting the substructures so that they can swing around the rotation axis, will be described below with reference to the drawings. FIG. 18 is a conceptual diagram of a first connecting structure according to an embodiment of the present invention. FIG. 18(A) shows a connecting structure with an S-shaped cross section. One of the open portions of the S-shaped end face engages with the pipe of one of the structures that make up the box structure, and the other open portion engages with the pipe of the other structure that makes up the box structure. By employing such a connecting structure, one structure and the other structure constituting the box structure can be detachably connected, and the one structure and the other structure constituting the box structure can swing relative to each other. FIG. 18(B) shows a connecting structure with a C-shaped cross section. The open portion of the C-shaped end surface engages with the pipe of one of the structures that make up the box structure, and one portion of the C-shaped end surface is fixed to the pipe of the other structure that makes up the box structure. By employing such a connecting structure, one structure and the other structure constituting the box structure can be detachably connected, and the one structure and the other structure constituting the box structure can swing relative to each other. FIG. 18(C) shows a linkage structure with a classic hinge structure. A hinge structure is fixed to one structure and the other structure that constitute the box structure. By employing such a connecting structure, one structure and the other structure constituting the box structure can be detachably connected, and the one structure and the other structure constituting the box structure can swing relative to each other.

[0195] FIG. 19 is a conceptual diagram of a second connecting structure according to an embodiment of the present invention. The connecting structure shown in FIG. The connecting structure shown in either Figure 19(A) or (B) swingably connects the right bottom partial structure 300r and the left bottom partial structure 300l. A connecting member 510 is secured to one of the right bottom portion structure 300r and the left bottom portion structure 300l. When the right bottom imaginary surface S30r of the right bottom partial structure 300r and the left bottom imaginary surface S30l of the left bottom partial structure 300l define the bottom surface of the box shape, the connecting member 510 contacts the other of the right bottom partial structure 300r and the left bottom partial structure 300l. As a result, the right bottom partial structure 300r and the left bottom partial structure 300l maintain a posture in which the right bottom imaginary surface S30r and the left bottom imaginary surface S30l define the bottom surface of the box shape. When the right and left bottom substructures 300r, 300l are folded, the connecting member 510 moves away from the other of the right and left bottom substructures 300r, 300l.

[0196] FIG. 20 is a conceptual diagram of a third connecting structure according to an embodiment of the present invention. The upper front and rear partial structure 110 has a biasing structure that biases the left upper front and rear partial structure 110l and the right upper front and rear partial structure 110r from the formed position to the folded position. FIG. 20 shows how the helical spring 111 is provided in a connecting structure that connects the left upper front-rear structure 110l and the right upper front-rear structure 110r so that they can swing freely around the second vertical axis of rotation P2.

[0197] As described above, the use of the box structure according to the embodiment of the present invention has the following effects. The box structure is made up of a left and right partial structure 200 that can partition a pair of left and right side surfaces Qr, Ql of a box-shaped configuration formed in the storage space W, a front and rear partial structure 100 that can partition a pair of front and rear side surfaces Pf, Pb, and a bottom partial structure 300 that can partition a bottom surface D, and the front and rear partial structure 100 is made up of an upper front and rear partial structure 110 that can partition a part of the pair of front and rear side surfaces Pr, Pb and a lower front and rear partial structure 120 located below it, and the left and right edges of the upper front and rear partial structure 110 are respectively a right partial structure 200r and a right partial structure 200r. The upper front-rear partial structure 110 is connected to the left partial structure 200l, and the left and right edges of the upper front-rear partial structure 110 are expandable and contractible in the left-right direction. The edges of the lower front-rear partial structure 120 are connected to the left-right partial structure 200 or the bottom partial structure 300 so as to be swingable around a rotation axis. The lower front-rear imaginary surface S12 can change its position between a formed position in which it partitions at least a portion of a pair of front and rear side surfaces Pf, Pb of a box-like shape formed in the storage space W, and a folded position in which the lower front-rear imaginary surface S12 faces the left-right imaginary surface S20. In this way, the storage space W can be changed between a formed position in which it is box-shaped and a folded position in which it is contracted in the left-right direction.

[0198] In the forming posture, the lower front and rear partial structure 120 and the upper front and rear partial structure 110 can be detachably connected. This allows the forming posture to be stabilized.

[0199] The upper front and rear partial structure may be divided into two pieces, left and right. The upper front-rear partial structure 110 has a pair of right upper front-rear partial structure 110r and left upper front-rear partial structure 110l, whose edges are connected to each other so as to be swingable about a second vertical rotation axis P2. The right upper front and rear partial structure 110r and the left upper front and rear partial structure 110l connect their left and right edges to the right partial structure 200r and the left partial structure 200l so as to be swingable about a first right vertical rotation axis P1r and a first left vertical rotation axis P1l. When in the formed posture, the right upper front-rear imaginary surface S11r and the left upper front-rear imaginary surface S11l, which are surfaces that can be imagined as the internal dimensions of the right upper front-rear partial structure 110r and the left upper front-rear partial structure 110l, define at least a portion of a pair of front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space W. When in the folded position, the right upper front-rear imaginary surface S11r and the left upper front-rear imaginary surface S11l face each other and are imaginary surfaces that can partition a pair of left and right side surfaces Qr, Ql of the box-like shape formed in the storage space W, which can be imagined based on the interior dimensions of the right partial structure 200r and the left partial structure 200l. This allows the storage space W to be changed between a formed position in which it is box-shaped and a folded position in which it is contracted in the left-right direction, and the formed position and the folded position can be stabilized.

[0200] The upper front and rear substructure may be divided into three pieces. A pair of right upper front and rear partial structures 110r and 110l are swingably connected to the left and right edges of a central upper front and rear partial structure 110m located between them via a second vertical rotation axis P2. The right upper front and rear partial structure 110r and the left upper front and rear partial structure 110l connect their left and right edges to the right partial structure 200r and the left partial structure 200l so as to be swingable about a first right vertical rotation axis P1r and a first left vertical rotation axis P1l. When in the formed posture, the right upper front-rear imaginary surface S11r and the left upper front-rear imaginary surface S11l, which are surfaces that can be imagined as the internal dimensions of the right upper front-rear partial structure 110r and the left upper front-rear partial structure 110l, define at least a portion of a pair of front and rear side surfaces Pf, Pb of the box-like shape formed in the storage space. When in the folded position, the right upper front-rear imaginary surface S11r and the left upper front-rear imaginary surface S11l face each other, and are imaginary surfaces that can partition a pair of left and right side surfaces Qr, Ql of a box-like shape formed in the storage space, which can be imagined based on the interior dimensions of the right partial structure 200r and the left partial structure 200l. This allows the storage space W to change between a formed position in which it assumes a box-like shape and a folded position in which it contracts in the left-right direction, and the formed position and the folded position can be stabilized.

[0201] The upper front and rear substructure may move up and down. In the forming position, when the upper front-rear partial structure 110 moves downward, it is connected to the lower front-rear partial structure 120, and when the upper front-rear partial structure 110 moves upward, it is disconnected from the lower front-rear partial structure 120. This makes it possible to easily stabilize the forming posture.

[0202] The bottom portion structure may be one piece or two pieces. The left or right edge of the bottom partial structure 300 is connected to the right partial structure 200r or the left partial structure 200l so as to be able to swing freely around the fourth horizontal rotation axis P4, and when in the formed position, the bottom imaginary surface S30 of the bottom partial structure 300 defines at least a portion of the box-shaped bottom surface D formed in the storage space, and when in the folded position, the bottom imaginary surface S30 faces the left and right imaginary surfaces S20 of the left and right partial structures 200 so that their surfaces face each other. This arrangement allows the folded position to be stabilized.

[0203] The bottom portion structure may be in two pieces. The right bottom portion structure 300r and the left bottom portion structure 300l of the bottom portion structure 300 are connected to each other so as to be able to swing freely about a fifth horizontal rotation axis P5. The right edge of the right bottom partial structure 300r and the left edge of the left bottom partial structure 300l are each connected to the pair of right and left partial structures 200r and 200l so as to be swingable about a fourth horizontal rotation axis P4. In the formed posture, at least a part of the bottom surface D is defined by a right bottom imaginary surface S30r and a left bottom imaginary surface S30l that can be imagined on the inside dimensions of the right bottom partial structure 300r and the left bottom partial structure 300l. In the folded position, the right and left bottom imaginary surfaces S30r and S30l face each other, as do the right and left imaginary surfaces S20r and S20l, which can be imagined based on the interior dimensions of the right and left partial structures 200r and 200l, respectively. This arrangement allows the forming position and the folding position to be stable.

[0204] The upper front and rear substructures may move up and down to avoid the bottom substructure. When in the folded position, the upper front and rear partial structure 110 can move upward along the axial direction of the first vertical rotation axis P1 to a position where the bottom of the upper front and rear partial structure 110 is higher than the top of the bottom partial structure 300. This prevents physical interference between the upper front and rear partial structure 110 and the bottom partial structure 300 when changing the position between the formed position and the folded position.

[0205] The bottom portion structure may be divided into front and rear portions. The bottom portion structure 300 has a first bottom portion structure 310 and an second bottom portion structure 320 arranged side by side in the front-rear direction. The one bottom portion structure 310 is divided into a right one bottom portion structure 310r and a left one bottom portion structure 310l. The right one bottom partial structure 310r and the left one bottom partial structure 310l are connected to be able to swing freely around a fifth horizontal rotation axis P5. The right one bottom partial structure 310r and the left one bottom partial structure 310l are connected to the right partial structure 200r and the left partial structure 200l so as to be swingable about the fourth right horizontal rotation axis P4r and the fourth left horizontal rotation axis P4l, respectively. When in the formed position, the right side bottom imaginary surface S31r and the left side bottom imaginary surface S31l, which can be imagined based on the internal dimensions of the right side bottom portion structure 310r and the left side bottom portion structure 310l, define at least a portion of the box-shaped bottom surface D formed in the storage space. In the folded position, the right side bottom imaginary surface S31r and the left side bottom imaginary surface S31l face each other toward the right imaginary surface S20r and the left imaginary surface S20l which can be imagined as the interior dimensions of the right partial structure 200r and the left partial structure 200l. On the other hand, the left edge or the right edge of the bottom partial structure 320 is connected to at least one of the right partial structure 200r or the left partial structure 200l so as to be able to swing freely about a fourth horizontal rotation axis P4, which is a horizontal rotation axis. When in the formed posture, the other bottom imaginary surface S32 that can be imagined on the inside dimensions of the other bottom portion structure 320 defines a part of the bottom surface D of the box shape formed in the storage space. When in the folded position, the other bottom imaginary surface S32 faces an imaginary surface that can be imagined as the interior dimension of the right partial structure 200r or the left partial structure 200l. This allows the forming posture to be stabilized.

[0206] The lower front and rear substructure may swing about a vertical axis of rotation. The right edge or the left edge of the lower front and rear partial structure 120 is connected to at least one of the right partial structure 200r or the left partial structure 200l so as to be able to swing freely about a third vertical rotation axis P3. When in the formed posture, a lower front-rear imaginary surface S12 that can be imagined as the interior dimensions of the lower front-rear partial structure 120 defines at least a part of a pair of front and rear side surfaces Pf, Pb of the box shape formed in the storage space. When in the folded position, the lower front-rear imaginary plane 120 faces the left-right imaginary plane S20 that can be imagined as the interior dimensions of the right partial structure 100r or the left partial structure 200l. This arrangement allows the forming position and the folding position to be stabilized.

[0207] The lower front and rear substructure may be separated into two pieces. The lower front and rear partial structure 120 is divided into a right lower front and rear partial structure 120r and a left lower front and rear partial structure 120l when viewed from the front. The right edge of the right lower front-rear partial structure 120r is connected to the right partial structure 200r so as to be able to swing freely about a third right vertical rotation axis P3. In the formed posture, a right lower front and rear imaginary surface S12r that can be imagined as the interior dimensions of the right lower front and rear partial structure 120r defines at least a part of a pair of front and rear side surfaces Pf, Pb of the box shape formed in the storage space. In the folded posture, the right lower front-rear imaginary plane S12r faces a right imaginary plane S20r that can be imagined as the interior dimension of the right partial structure 200r. The left edge of the left lower front-rear partial structure 120l is connected to the left partial structure 200l so as to be able to swing freely about a third left vertical rotation axis P3. In the formed posture, a left lower front / rear imaginary surface S12l that can be imagined as the interior dimensions of the left lower front / rear partial structure 120l defines at least a part of a pair of front and rear side surfaces Pf, Pb of the box shape formed in the storage space. When in the folded position, the left lower front-rear imaginary plane S12l faces a left imaginary plane S20l that can be imagined as the interior dimension of the left partial structure 200l. This arrangement allows the forming position and the folding position to be stabilized.

[0208] The left and right substructures may have a U-shaped structure. The upper front portion structure 110f defines at least a part of the front side surface Pf of the box-like shape formed in the storage space. The upper front structure 110f is divided into a right upper front structure 110rf and a left upper front structure 110lf when viewed from the front. The right edge of the right upper front partial structure 110rf and the left edge of the left upper front partial structure 110lf are connected to the right partial structure 200r and the left partial structure 200l, respectively, so as to be freely movable about the first right front vertical rotation axis P1rf and the first left front vertical rotation axis P1lf, and the left edge of the right upper front partial structure 110rf and the right edge of the left upper front partial structure 110lf are connected to be freely swingable about the second front vertical rotation axis P2f. The upper rear portion structure 110b defines at least a part of the rear side surface Pb of the box-like shape formed in the storage space. The upper rear partial structure 110b, which will be described later, is divided into a right upper rear partial structure 110rb and a left upper rear partial structure 110lb on the left and right sides when viewed from the front. The right edge of the right upper rear partial structure 110rb and the left edge of the left upper rear partial structure 110lb are connected to the right partial structure 200r and the left partial structure 200l, respectively, so as to be freely movable about the first right rear vertical rotation axis P1rb and the first left rear vertical rotation axis P1lb, and the left edge of the right upper rear partial structure 110rb and the right edge of the left upper rear partial structure 110lb are connected to be freely swingable about the second rear vertical rotation axis P2b. The first right front vertical rotation axis P1rf is located at a position separated by a right front horizontal distance Hrf to the left of the position of the right imaginary plane S20r. The first left front vertical rotation axis P1lf is located at a position separated by a left front horizontal distance Hlf to the right from the position of the left imaginary plane S20l. The first right rear vertical rotation axis P1rb is located at a position separated by a right rear horizontal distance Hrb to the left of the position of the right imaginary plane S20r. The first left rear vertical rotation axis P1lb is located at a position separated by a left rear horizontal distance Hlb to the right from the position of the left imaginary plane S20l. By doing so, even if the width in the left-right direction is longer than the width in the front-rear direction, the forming posture can be stabilized.

[0209] In the folded state, the upper front portion structure and the upper rear portion structure may be arranged side by side, separated into left and right. When in the formed posture, a right upper front imaginary surface S11rf that can be imagined based on the inside dimensions of the right upper front partial structure 110rf, a left upper front imaginary surface S11lf that can be imagined based on the inside dimensions of the left upper front partial structure 110lf, a left upper rear imaginary surface S11rb that can be imagined based on the inside dimensions of the right upper rear partial structure 110rb, and a left upper rear imaginary surface S11lb that can be imagined based on the inside dimensions of the left upper rear partial structure 110lb each define the front and rear sides Pf, Pb of the box-like shape formed in the storage space W. In the folded position, a structure in which the right upper front structure 110rf and the left upper front structure 110lf are stacked horizontally and a combined structure in which the right upper rear structure 110rb and the left upper rear structure 110lb are stacked horizontally are arranged side by side in the left-right direction, with the right virtual surface S20r and the left virtual surface S20l facing each other. This arrangement makes it possible to stabilize the folding property.

[0210] The upper front partial structure and the upper rear partial structure may be offset from each other to the left and right. Either right front horizontal distance Hrf>left front horizontal distance Hlf and right rear horizontal distance Hrb<left rear horizontal distance Hlb, or right front horizontal distance Hrf<left front horizontal distance Hlf and right rear horizontal distance Hrb>left rear horizontal distance Hlb. This allows the posture to be smoothly changed between the formed posture and the folded posture.

[0211] The lengths of the two left and right pieces of the upper front and rear partial structure may be different. Right front horizontal distance Lrf > left front horizontal distance Llf and right rear horizontal distance Lrb < left rear horizontal distance Llb, or Either the right front horizontal separation distance Lrf<the left front horizontal separation distance Llf and the right rear horizontal separation distance Lrb>the left rear horizontal separation distance Llb. This allows the posture to be smoothly changed between the formed posture and the folded posture.

[0212] The two left and right pieces of the bottom structure may be shifted forward or backward. The right bottom partial structure 300r and the left bottom partial structure 300l are relatively horizontally movable in the front-to-rear direction along the fifth horizontal rotation axis P5. This allows the posture to be smoothly changed between the formed posture and the folded posture.

[0213] The lower front and rear substructure may swing about a horizontal axis of rotation. When in the folded position, the lower front-rear imaginary plane S12 faces the floor imaginary plane S30, which is an imaginary plane that can be imagined based on the interior dimensions of the bottom portion structure 300 and can partition at least a portion of the bottom surface of the box-shaped shape formed in the storage space. Furthermore, the left and right virtual surfaces S20 are virtual surfaces that can be imagined as the interior dimensions of the right partial structure 200r or the left partial structure 200l and can partition at least a portion of a pair of left and right side surfaces Qr, Ql of a box-like shape formed in the storage space. In this way, it is possible to stabilize the folding posture of different types.

[0214] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the gist of the invention. [Explanation of symbols]

[0215] Double storage space P Front and rear pair of sides Pf Front side Pb rear side Q Pair of left and right sides Qr right side Ql left side D Bottom p1 First vertical rotation axis P1rf First front right vertical rotation axis P1rb First rear right vertical pivot P1lf First front left vertical axis P1lb First rear left vertical rotation axis Hrf Right front horizontal distance Hrb Right rear horizontal distance Hlf Left front horizontal distance Hlb Left rear horizontal distance Lrf Right front horizontal separation distance Lrb Right rear horizontal distance Llf Left front horizontal distance Llb Left rear horizontal distance P2 Second vertical rotation axis P2f Second front vertical rotation axis P2b Second rear vertical rotation axis P2r Second right vertical rotation axis P2l Second Left Vertical Rotation Axis P3 Third Vertical Rotation Axis P3r Third Right Vertical Rotation Axis P3r Third Left Vertical Axis P4 Fourth Horizontal Rotation Axis P4r Fourth Right Horizontal Rotation Shaft P4l Fourth Left Horizontal Rotation Axis P5 Fifth Horizontal Rotation Axis S10 Front and Rear Design S10r Right side front and rear hypothetical surfaces S10l Left side front and rear imaginary surface S11 upper part front and rear imaginary surface S11rf Right upper front protrusion S11lf upper left front side S11rb Right upper rear pseudo-surface S11lb Left upper rear anterior face S12 lower part front and back S12rf lower right front panel S12lf lower front left side S12rb Lower right rear pseudo-surface S12lb Lower left rear anterior face S20 left and right noodles S20r Youqi Xiangmian S20l Zuoqixianmian S30 Dixiang Noodles S30r right side bottom panel S30L Left Side Bottom Design S31 A side of the world S31r Right side bottom plan S31l Left side bottom plan S32 Another side of the world S32r Right side of the other side S32l Left side other side bottom imaginary surface 100 Front and rear part structure 100r Right side front and back section structure --- Right side section structure 100L Left Side Front and Back Sections Structure --- Left Side Section Structure 110 Upper front and rear section structure --- Upper section structure 110r Right upper part front and back structure---right upper part structure 110l Left upper part front and back structure---Left upper part structure 110m Central upper section front and rear structure---Central upper section structure 110rf upper right front part structure 110lf Left upper front part structure 110rb right upper rear part structure 110lb Upper left rear section construction 111 Payment Institution 120 Lower front and rear section structure --- Lower section structure 120r Lower Right Side Front and Back Section Structure --- Lower Right Side Section Structure 122l Left lower part front and back structure---Left lower part structure 120rf Lower right front section structure 120lf Left lower front section structure 120rb right lower rear part structure 120lb Lower left rear section construction Approximately 200 parts of the structure 200r right part construction 200l Left Part Structure 300 Bottom section construction 300r right side bottom section construction 300L Left side bottom section construction 310 One-sided bottom structure 310r Right side bottom construction 310l Left side bottom structure 320 Other side bottom part structure 320r right-side bottom structure 320L Left-side bottom structure 400 wheels [Preliminary Technology Documents] [License]

[0216] [License 1] Special lottery number 2009-126519 [License 2] Special lottery number 2019-92493 [License 3] Special lottery number 2021-31154 [License 4] Patent Publication No. 2020-59324 [Patent Document 5] Patent Publication No. 2018-114865 [Patent Document 6] Patent Publication No. 2019-135154 [Patent Document 7] Utility model registration 32187235

Claims

1. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The front and rear partial structures each have an upper front and rear partial structure that is a partial structure that can define at least a portion of a pair of front and rear side surfaces of a box-shaped structure formed in the storage space, and a lower front and rear partial structure that is a partial structure that can define at least a portion below the location defined by the upper front and rear partial structure on the pair of front and rear side surfaces of the box-shaped structure formed in the storage space, a right edge of the upper front and rear partial structure connected to the right partial structure, and a left edge of the upper front and rear partial structure connected to the left partial structure; The upper front and rear partial structure is capable of expanding and contracting the distance between the right edge and the left edge in the left-right direction, The edges of the lower front and rear partial structure are connected to one of the left and right partial structures or the bottom partial structure so as to be swingable about a rotation axis; When the lower front and rear partial structure swings around the rotation axis, its posture changes between a built-up posture and a folded posture, When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the lower front and rear imaginary planes face each other with left and right imaginary planes which are imaginary planes that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space, A box structure characterized by:

2. When in the forming posture, the upper front and rear partial structure and the lower front and rear partial structure can be detachably connected. The box structure according to claim 1 .

3. The upper front and rear partial structure has a pair of left and right partial structures that are separated into left and right parts when viewed from the front, a right upper front and rear partial structure and a left upper front and rear partial structure, When viewed from the front, the left edge of the right upper front-rear partial structure and the right edge of the left upper front-rear partial structure are connected to each other so as to be able to swing freely around a second vertical rotation axis, which is a vertical rotation axis; a right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be swingable about a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right upper front and rear partial structure swings around the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front and rear partial structure is in the formed posture, a right upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right upper front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be swingable about a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left upper front and rear partial structure swings around the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left upper front and rear partial structure is in the formed posture, a left upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-shaped shape formed in the storage space, When in the folded posture, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space. The box structure according to claim 2 .

4. The upper front and rear partial structure has a right upper front and rear partial structure, a left upper front and rear partial structure, and a central upper front and rear partial structure located between the right upper front and rear partial structure and the left upper front and rear partial structure, which are separated into left and right parts when viewed from the front, a left edge of the right upper front-rear partial structure and a right edge of the central upper front-rear partial structure are connected to each other so as to be swingable about a second right vertical rotation axis, which is a vertical rotation axis; a right edge of the left upper front-rear partial structure and a left edge of the central upper front-rear partial structure are connected to each other so as to be swingable about a second left vertical rotation axis, which is a vertical rotation axis; a right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be swingable about a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right upper front and rear partial structure swings around the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front and rear partial structure is in the formed posture, a right upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right upper front and rear partial structure, defines at least a part of the front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be swingable about a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left upper front and rear partial structure swings around the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left upper front and rear partial structure is in the formed posture, a left upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of the box-shaped shape formed in the storage space, When in the folded posture, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space.

4. A box structure according to claim 3.

5. The upper front and rear partial structure can move up and down along the axial direction of the first vertical rotation shaft, When in the forming posture, when the upper front-rear partial structure moves downward, the upper front-rear partial structure and the lower front-rear partial structure are connected, and when the upper front-rear partial structure moves upward, the connection between the upper front-rear partial structure and the lower front-rear partial structure is released. The box structure according to claim 4 .

6. The left edge or the right edge of the bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When the bottom portion structure pivots about the fourth horizontal axis of rotation, the bottom portion structure changes its position between a formed position and a folded position; When the bottom portion structure is in the formed position, a bottom imaginary surface that can be imagined as an internal dimension of the bottom portion structure defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the bottom imaginary surface faces left and right imaginary surfaces, which are imaginary surfaces that can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space of the right partial structure or the left partial structure. The box structure according to claim 5 .

7. The bottom portion structure has a right bottom portion structure and a left bottom portion structure that are separated into left and right parts when viewed from the front, When viewed from the front, the left edge of the right bottom portion structure and the right edge of the left bottom portion structure are connected to each other so as to be able to swing freely around a fifth horizontal rotation axis, which is a horizontal rotation axis; a right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the right bottom portion structure pivots about the fourth right horizontal rotation axis, its posture changes between a built-up posture and a folded posture; When the right bottom portion structure is in the formed position, a right bottom imaginary surface, which is a surface that can be imagined as an internal dimension of the right bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the right bottom imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; When the left bottom portion structure pivots about the fourth left horizontal rotation axis, the left bottom portion structure changes its position between a formed position and a folded position; When the left bottom portion structure is in the formed position, a left bottom imaginary plane, which is a plane that can be imagined as an internal dimension of the left bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the left bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can define the left side surface of a box-like shape formed in the storage space. The box structure according to claim 6 .

8. When in the folded position, the upper front and rear substructure can be moved upward along the axial direction of the first vertical rotation axis to a position where the bottom of the upper front and rear substructure is higher than the top of the bottom substructure; The box structure according to claim 7 .

9. The bottom portion structure has a first bottom portion structure and a second bottom portion structure which are a plurality of portion structures arranged separately in the front-rear direction, The one bottom portion structure has a right one bottom portion structure and a left one bottom portion structure that are separated into left and right when viewed from the front, The left edge of the right-side bottom portion structure and the right edge of the left-side bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis, which is a horizontal rotation axis; a right edge of the right one bottom portion structure is connected to the right portion structure so as to be swingable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the right one bottom portion structure swings around the fourth right horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the storage space is in the formed position, a right-side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the right-side bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the right-side one-bottom imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left one-side bottom portion structure is connected to the left portion structure so as to be swingable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; When the left one bottom portion structure swings around the fourth left horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the left side bottom portion structure is in the formed posture, a left side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the left side bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the left one-bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, The left edge or the right edge of the other bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When the other bottom portion structure swings about the fourth horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the storage space is in the formed position, the other bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the other bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the other bottom imaginary surface faces an imaginary surface that can be imagined as an interior dimension of the right partial structure or the left partial structure and that can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space, When in the forming posture, the one bottom portion structure and the other bottom portion structure can be detachably connected. The box structure according to claim 8 .

10. The right edge or the left edge of the lower front and rear partial structure is connected to at least one of the right partial structure or the left partial structure so as to be swingable about a third vertical rotation axis, which is a rotation axis perpendicular to the right partial structure, When the lower front and rear partial structure swings around the third vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the lower front and rear imaginary planes face each other, and the left and right imaginary planes are imaginary planes that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space.

10. The box structure of claim 9.

11. The lower front and rear partial structure has a right lower front and rear partial structure and a left lower front and rear partial structure that are separated into left and right parts when viewed from the front, a right edge of the right lower front and rear partial structure is connected to the right partial structure so as to be swingable about a third right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right lower front and rear partial structure swings around the third right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right lower front and rear partial structure is in the formed posture, a right lower front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right lower front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left lower front and rear partial structure is connected to the left partial structure so as to be swingable about a third left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left lower front and rear partial structure swings around the third left vertical rotation axis, its posture changes between a built-up posture and a folded posture; The left lower front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the left lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the left lower front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space. The box structure according to claim 10.

12. The front portion structure has an upper front portion structure that can define at least a part of the front side surface of a box-shaped shape formed in the storage space, The upper front structure has a right upper front structure and a left upper front structure that are separated into left and right parts when viewed from the front, a right edge of the right upper front section structure is connected to the right section structure so as to be pivotable about a first right front vertical rotation axis; a left edge of the left upper front section structure is pivotally connected to the left section structure about a first left front vertical rotation axis; When viewed from the front, the left edge of the right upper front structure and the right edge of the left upper front structure are connected to each other so as to be able to swing freely around a second front vertical rotation axis, which is a vertical rotation axis; The rear portion structure has an upper rear portion structure that can define at least a part of the rear side of a box-shaped shape formed in the storage space, The upper rear portion structure has a right upper rear portion structure and a left upper rear portion structure that are separated into left and right parts when viewed from the front, a right edge of the right upper rear partial structure is pivotally connected to the right partial structure about a first right rear vertical rotation axis; a left edge of the left upper rear partial structure is pivotally connected to the left partial structure about a first left rear vertical rotation axis; When viewed from the front, the left edge of the right upper rear portion structure and the right edge of the left upper rear portion structure are connected to each other so as to be able to swing freely around a second rear vertical rotation axis, which is a vertical rotation axis; the first right front vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane, the first left front vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane, the first right rear vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane, the first left rear vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane, The box structure according to claim 11 .

13. When the right upper front portion structure swings about the first right front vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front portion structure is in the formed posture, a right upper front imaginary plane, which is a plane that can be imagined on the inside dimension of the right upper front portion structure, defines at least a part of the front side of the box-shaped shape formed in the storage space, When in the folded posture, the right upper front imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, When the left upper front portion structure swings about the first left front vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left-side upper front portion structure is in the formed posture, a left-side upper front imaginary surface, which is a surface that can be imagined on the inside dimension of the left-side upper front portion structure, defines at least a part of the front side surface of the box-like shape formed in the storage space, When in the folded posture, the left upper front imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, When the right upper rear portion structure swings about the first right rear vertical rotation axis, its posture changes between a built posture and a folded posture; When the storage space is in the formed position, a left upper rear imaginary plane, which is a plane that can be imagined on the inside dimension of the right upper rear portion structure, defines at least a part of the rear side of the box-shaped shape formed in the storage space, When in the folded posture, the right upper rear imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, When the left upper rear portion structure swings around the first left rear vertical rotation axis, its posture changes between a built posture and a folded posture; When the left upper rear portion structure is in the formed posture, a left upper rear imaginary plane, which is a plane that can be imagined on the inside dimension of the left upper rear portion structure, defines at least a part of the rear side of the box-shaped shape formed in the storage space, When in the folded posture, the left upper rear imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, In the folded posture, a structure in which the right upper front portion structure and the left upper front portion structure are overlapped laterally and a structure in which the right upper rear portion structure and the left upper rear portion structure are overlapped laterally are arranged adjacent to each other in the left-right direction. The box structure according to claim 12,

14. Either right front horizontal distance > left front horizontal distance and right rear horizontal distance < left rear horizontal distance, or right front horizontal distance < left front horizontal distance and right rear horizontal distance > left rear horizontal distance.

14. The box structure according to claim 13.

15. When in a formation posture, The horizontal distance in the left-right direction between the first right front vertical rotation axis and the second front vertical rotation axis is referred to as a right front horizontal separation distance, The horizontal distance in the left-right direction between the first left front vertical rotation axis and the second front vertical rotation axis is referred to as a left front horizontal separation distance, The horizontal distance in the left-right direction between the first right rear vertical rotation axis and the second rear vertical rotation axis is referred to as a right rear horizontal separation distance, When the horizontal distance in the left-right direction between the first left rear vertical rotation axis and the second rear vertical rotation axis is referred to as the left rear horizontal separation distance, the right front horizontal separation distance > the left front horizontal separation distance and the right rear horizontal separation distance < the left rear horizontal separation distance, or the right front horizontal separation distance < the left front horizontal separation distance and the right rear horizontal separation distance > the left rear horizontal separation distance; 15. The box structure according to claim 14.

16. The bottom portion structure has a pair of left and right bottom portion structures, a right bottom portion structure and a left bottom portion structure, a right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; a left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; The left edge of the right bottom portion structure and the right edge of the left bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis extending along the front-rear direction, The right bottom portion structure and the left bottom portion structure are relatively horizontally movable in the front-rear direction along a fifth horizontal rotation axis.

16. The box structure according to claim 15.

17. The lower edge of the lower front and rear partial structure is connected to the bottom partial structure so as to be able to swing freely around a sixth rotation axis which is a rotation axis, When the lower front and rear partial structure swings around the sixth rotation axis, its posture changes between a formed posture and a folded posture, When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded position, the lower front and rear imaginary planes face each other, and the imaginary plane faces a floor imaginary plane, which is an imaginary plane that can be imagined as an inner dimension of the bottom portion structure and can define at least a part of the bottom surface of a box-shaped shape formed in the storage space.

2. The box structure of claim 1.

18. The upper front and rear partial structure can move up and down along the axial direction of the first vertical rotation shaft, When in the forming posture, when the upper front-rear partial structure moves downward, the upper front-rear partial structure and the lower front-rear partial structure are connected, and when the upper front-rear partial structure moves upward, the connection between the upper front-rear partial structure and the lower front-rear partial structure is released. The box structure according to claim 1 .

19. When in the folded position, the upper front and rear substructure can be moved upward along the axial direction of the first vertical rotation axis to a position where the bottom of the upper front and rear substructure is higher than the top of the bottom substructure; The box structure according to claim 1 .

20. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The front or rear structure has an upper front or rear portion structure that can partition at least a portion including upper edges of a pair of front and rear side surfaces of a box shape formed in the storage space, The upper front and rear partial structure has a right upper front and rear partial structure and a left upper front and rear partial structure that are separated into left and right parts when viewed from the front, When viewed from the front, the left edge of the right upper front-rear partial structure and the right edge of the left upper front-rear partial structure are connected to each other so as to be able to swing freely around a second vertical rotation axis, which is a vertical rotation axis; a right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be swingable about a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right upper front and rear partial structure swings around the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front and rear partial structure is in the formed posture, a right upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right upper front and rear partial structure, defines at least a part of the front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be swingable about a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left upper front partial structure pivots about the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left upper portion is in the formed posture, a left upper front and rear imaginary plane, which is a plane that can be imagined on the inside dimension of the left upper portion partial structure, defines at least a part of the front and rear side surfaces of the box-shaped shape formed in the storage space, When in the folded posture, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space. A box structure characterized by:

21. The upper front and rear partial structure has a first biasing mechanism which is a mechanism that biases the left upper front and rear partial structure and the right upper front and rear partial structure from a position when they are in a formed position to a position when they are in a folded position.

21. The box structure of claim 20.

22. The bottom portion structure has a second biasing mechanism which is a mechanism for biasing the right bottom portion structure and the left bottom portion structure so that they are in a folded position from a position when they are in a formed position. The box structure according to claim X20.

23. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The front or rear partial structure has an upper front or rear partial structure that is a partial structure that can partition at least a portion including upper edges of a pair of front and rear side surfaces of a box shape formed in the storage space, The upper front and rear partial structure has a right upper front and rear partial structure and a left upper front and rear partial structure which are separated into left and right parts when viewed from the front, and a central upper front and rear partial structure located between the right upper front and rear partial structure and the left upper front and rear partial structure, a left edge of the right upper front-rear partial structure and a right edge of the central upper front-rear partial structure are connected to each other so as to be swingable about a second right vertical rotation axis, which is a vertical rotation axis; a right edge of the left upper front-rear partial structure and a left edge of the central upper front-rear partial structure are connected to each other so as to be swingable about a second right vertical rotation axis, which is a vertical rotation axis; a right edge of the right upper front and rear partial structure is connected to the right partial structure so as to be swingable about a first right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right upper front and rear partial structure swings around the first right vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front and rear partial structure is in the formed posture, a right upper front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right upper front and rear partial structure, defines at least a part of the front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right upper front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left upper front and rear partial structure is connected to the left partial structure so as to be swingable about a first left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left upper front and rear partial structure swings around the first left vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left upper front and rear partial structure is in the formed posture, a left upper front and rear imaginary plane, which is a plane that can be imagined on the inside dimensions of the left upper front and rear partial structure, defines at least a part of the front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the left upper front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space. A box structure characterized by

24. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; A bottom structure that is a partial structure that can divide the bottom surface of the storage space; Equipped with The front or rear partial structure has a lower front or rear partial structure that is a partial structure that can partition at least a part of a pair of front and rear side surfaces of a box-shaped shape formed in the storage space, The right edge or the left edge of the lower front and rear partial structure is connected to at least one of the right partial structure or the left partial structure so as to be swingable about a third vertical rotation axis, which is a rotation axis perpendicular to the right partial structure, When the lower front and rear partial structure swings around the third vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the lower front and rear partial structure is in the formed posture, a lower front and rear imaginary surface, which is a surface that can be imagined as an internal dimension of the lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the lower front and rear imaginary planes face each other, and the left and right imaginary planes are imaginary planes that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space. A box structure characterized by:

25. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The front or rear structure has a lower front or rear portion structure that can partition at least a part of a pair of front and rear side surfaces of a box-like shape formed in the storage space, The lower front and rear partial structure has a right lower front and rear partial structure and a left lower front and rear partial structure that are separated into left and right parts when viewed from the front, a right edge of the right lower front and rear partial structure is connected to the right partial structure so as to be swingable about a third right vertical rotation axis, which is a rotation axis perpendicular to the right partial structure; When the right lower front and rear partial structure swings around the third vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right lower front and rear partial structure is in the formed posture, a right lower front and rear imaginary plane, which is a plane that can be imagined as an internal dimension of the right lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the right lower front and rear imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined as an interior dimension of the right partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space, a left edge of the left lower front and rear partial structure is connected to the left partial structure so as to be swingable about a third left vertical rotation axis, which is a rotation axis perpendicular to the left partial structure; When the left lower front and rear partial structure swings around the third vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left lower front and rear partial structure is in the formed posture, a left lower front and rear imaginary plane, which is a plane that can be imagined on the inside dimension of the left lower front and rear partial structure, defines at least a part of a pair of front and rear side surfaces of a box shape formed in the storage space, When in the folded posture, the left lower front and rear imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined as an interior dimension of the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space. A box structure characterized by:

26. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The left edge or the right edge of the bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When the bottom portion structure pivots about the fourth horizontal axis of rotation, the bottom portion structure changes its position between a formed position and a folded position; When the bottom portion structure is in the formed position, a bottom imaginary surface that can be imagined as an internal dimension of the bottom portion structure defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the bottom imaginary surface faces left and right imaginary surfaces, which are imaginary surfaces that can be imagined as the interior dimensions of the right partial structure or the left partial structure and can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space, A box structure characterized by:

27. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The bottom portion structure has a pair of left and right partial structures, a right bottom portion structure and a left bottom portion structure, which are separated into left and right parts when viewed from the front, When viewed from the front, the left edge of the right bottom portion structure and the right edge of the left bottom portion structure are connected to each other so as to be able to swing freely around a fifth horizontal rotation axis, which is a horizontal rotation axis; a right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the right bottom portion structure pivots about the fourth right horizontal rotation axis, its posture changes between a built-up posture and a folded posture; When the right bottom portion structure is in the formed position, a right bottom imaginary surface, which is a surface that can be imagined as an internal dimension of the right bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the right bottom imaginary plane faces a right imaginary plane, which is an imaginary plane that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the left bottom portion structure pivots about the fourth right horizontal rotation axis, the left bottom portion structure changes its position between a built-up position and a folded position; When the left bottom portion structure is in the formed position, a left bottom imaginary plane, which is a plane that can be imagined as an internal dimension of the left bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the left bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can define the left side surface of a box-like shape formed in the storage space. A box structure characterized by:

28. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The bottom portion structure has a first bottom portion structure and a second bottom portion structure which are a plurality of portion structures arranged separately in the front-rear direction, The one bottom portion structure has a right one bottom portion structure and a left one bottom portion structure that are separated into left and right when viewed from the front, The left edge of the right-side bottom portion structure and the right edge of the left-side bottom portion structure are connected to each other so as to be swingable about a fifth horizontal rotation axis, which is a horizontal rotation axis; a right edge of the right one bottom portion structure is connected to the right portion structure so as to be swingable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; When the right one bottom portion structure swings around the fourth right horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the storage space is in the formed position, a right-side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the right-side bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the right-side imaginary bottom surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the inside dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, a left edge of the left one-side bottom portion structure is connected to the left portion structure so as to be swingable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; When the left one bottom portion structure swings around the fourth left horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the left side bottom portion structure is in the formed posture, a left side bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the left side bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the left one-bottom imaginary plane faces a left imaginary plane, which is an imaginary plane that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, The left edge or the right edge of the other bottom partial structure is connected to at least one of the right partial structure or the left partial structure so as to be able to swing freely around a fourth horizontal rotation axis, which is a horizontal rotation axis; When the other bottom portion structure swings about the fourth horizontal rotation axis, its posture changes between a formed posture and a folded posture; When the storage space is in the formed position, the other bottom imaginary surface, which is a surface that can be imagined on the inside dimension of the other bottom portion structure, defines at least a part of the bottom surface of the box-shaped shape formed in the storage space, When in the folded position, the other bottom imaginary surface faces an imaginary surface that can be imagined as an interior dimension of the right partial structure or the left partial structure and that can partition at least a part of a pair of left and right side surfaces of a box-like shape formed in the storage space. When the forming posture is reached, the one bottom portion structure and the other bottom portion structure can be detachably connected to each other. A box structure characterized by:

29. A box structure that can divide a virtual storage space and can change its posture between a forming posture in which a box-shaped shape consisting of a pair of front and rear side surfaces, a pair of left and right side surfaces, and a bottom surface is formed in the storage space, and a folding posture in which the storage space is folded to reduce the storage space in the left and right direction, a front and rear partial structure including a front partial structure and a rear partial structure that are a pair of front and rear partial structures that can partition a pair of front and rear side surfaces of a box-shaped structure formed in the storage space; a pair of left and right partial structures including a right partial structure and a left partial structure that can partition a pair of left and right side surfaces of a box-shaped structure formed in the storage space; a bottom portion structure that is a partial structure that can partition the bottom surface of the box-shaped structure formed in the storage space; Equipped with The front portion structure has an upper front portion structure that can define at least a part of the front side surface of a box-shaped shape formed in the storage space, The upper front structure has a right upper front structure and a left upper front structure that are separated into left and right parts when viewed from the front, a right edge of the right upper front section structure is connected to the right section structure so as to be pivotable about a first right front vertical rotation axis; a left edge of the left upper front section structure is pivotally connected to the left section structure about a first left front vertical rotation axis; When viewed from the front, the left edge of the right upper front structure and the right edge of the left upper front structure are connected to each other so as to be able to swing freely around a second front vertical rotation axis, which is a vertical rotation axis; The rear portion structure has an upper rear portion structure that can define at least a part of the rear side of a box-shaped shape formed in the storage space, The upper rear portion structure has a right upper rear portion structure and a left upper rear portion structure that are separated into left and right parts when viewed from the front, a right edge of the right upper rear partial structure is pivotally connected to the right partial structure about a first right rear vertical rotation axis; a left edge of the left upper rear partial structure is pivotally connected to the left partial structure about a first left rear vertical rotation axis; When viewed from the front, the left edge of the right upper rear portion structure and the right edge of the left upper rear portion structure are connected to each other so as to be able to swing freely around a second rear vertical rotation axis, which is a vertical rotation axis; the first right front vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane, the first left front vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane, the first right rear vertical rotation axis is located at a position a predetermined horizontal distance to the left of the position of the right imaginary plane, the first left rear vertical rotation axis is located at a position a predetermined horizontal distance to the right of the position of the left imaginary plane, A box structure characterized by:

30. When the right upper front portion structure swings about the first right front vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the right upper front portion structure is in the formed posture, a right upper front imaginary plane, which is a plane that can be imagined on the inside dimension of the right upper front portion structure, defines at least a part of the front side of the box-shaped shape formed in the storage space, When in the folded posture, the right upper front imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, When the left upper front portion structure swings about the first left front vertical rotation axis, its posture changes between a built-up posture and a folded posture; When the left-side upper front portion structure is in the formed posture, a left-side upper front imaginary surface, which is a surface that can be imagined on the inside dimension of the left-side upper front portion structure, defines at least a part of the front side surface of the box-like shape formed in the storage space, When in the folded posture, the left upper front imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, When the right upper rear portion structure swings about the first right rear vertical rotation axis, its posture changes between a built posture and a folded posture; When the right upper rear portion structure is in the formed posture, a right upper rear imaginary surface, which is a surface that can be imagined on the inside dimension of the right upper rear portion structure, defines at least a part of the rear side of the box-shaped shape formed in the storage space, When in the folded posture, the right upper rear imaginary surface faces a right imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the right partial structure and can partition the right side surface of a box-like shape formed in the storage space, When the left upper rear portion structure swings around the first left rear vertical rotation axis, its posture changes between a built posture and a folded posture; When the left upper rear portion structure is in the formed posture, a left upper rear imaginary plane, which is a plane that can be imagined on the inside dimension of the left upper rear portion structure, defines at least a part of the rear side of the box-shaped shape formed in the storage space, When in the folded posture, the left upper rear imaginary surface faces a left imaginary surface, which is an imaginary surface that can be imagined based on the interior dimensions of the left partial structure and can partition the left side surface of a box-like shape formed in the storage space, In the folded posture, a structure in which the right upper front portion structure and the left upper front portion structure are overlapped laterally and a combined structure in which the right upper rear portion structure and the left upper rear portion structure are overlapped laterally are arranged adjacent to each other in the left-right direction.

30. The box structure according to claim 29,

31. Either right front horizontal distance > left front horizontal distance and right rear horizontal distance < left rear horizontal distance, or right front horizontal distance < left front horizontal distance and right rear horizontal distance > left rear horizontal distance. The box structure according to claim X30.

32. When in a formation posture, The horizontal distance in the left-right direction between the first right front vertical rotation axis and the second front vertical rotation axis is referred to as a right front horizontal separation distance, The horizontal distance in the left-right direction between the first left front vertical rotation axis and the second front vertical rotation axis is referred to as a left front horizontal separation distance, The horizontal distance in the left-right direction between the first right rear vertical rotation axis and the second rear vertical rotation axis is referred to as a right rear horizontal separation distance, When the horizontal distance in the left-right direction between the first left rear vertical rotation axis and the second rear vertical rotation axis is referred to as the left rear horizontal separation distance, the right front horizontal separation distance > the left front horizontal separation distance and the right rear horizontal separation distance < the left rear horizontal separation distance, or the right front horizontal separation distance < the left front horizontal separation distance and the right rear horizontal separation distance > the left rear horizontal separation distance; 31. A box structure according to claim 30.

33. The bottom portion structure has a pair of left and right bottom portion structures, a right bottom portion structure and a left bottom portion structure, a right edge of the right bottom portion structure is connected to the right portion structure so as to be pivotable about a fourth right horizontal rotation axis, which is a horizontal rotation axis; a left edge of the left bottom portion structure is connected to the left portion structure so as to be pivotable about a fourth left horizontal rotation axis, which is a horizontal rotation axis; The left edge of the right bottom partial structure and the right edge of the left bottom partial structure are pivotable about a fifth horizontal rotation axis extending along the front-to-rear direction, The right bottom portion structure and the left bottom portion structure are connected to each other so as to be relatively movable horizontally in the front-rear direction along a fifth horizontal rotation axis.

33. A box structure according to claim 32.

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