Assembled furniture structure, posts, bars, structural boards and top components

Abstract

By combining a relatively small number of types of parts, we construct high-strength prefabricated furniture. [Solution] The prefabricated furniture structure 1 comprises a post 10, a bar 20, a joint 30, and a roughly rectangular structural board 40. The post 10 is provided with multiple second holes 15, and the bar 20 is provided with a third hole 25 for fixing the structural board 40. The joint 30 can be fixed to the post 10 with screws, and the bar 20 can be fixed to the joint 30 in a position that covers the joint 30 fixed to the post 10. The bent portions 43 and 44 of the structural board 40 have through-holes, which are board fixing holes into which screws can be placed, so that when the structural board 40 is placed as a shelf, the three bent portions 43 and 44 can each be screwed into the third hole 25, and when the structural board 40 is placed as a back panel, the three bent portions 43 and 44 can each be screwed into the second hole 15 and the third hole 25, respectively.

Description

【Technical Field】 【0001】 This invention relates to an assembled furniture structure, a post, a bar, a structural board, and a top member, which are composed of a combination of a post, a bar, and a structural board. 【Background Art】 【0002】 Conventionally, assembled furniture that can be constructed by assembling several members has become widespread. Assembled furniture has advantages such as being easy to transport parts and assemble them at the installation site, and is attractive. 【0003】 Patent Document 1 below shows an assembly structure of furniture using a connecting member for connecting long members. By using such a connecting member, it is possible to connect members in the vertical direction. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2024-033088 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 By the way, when constructing assembled furniture as described above, it is preferable from the viewpoints of manufacturing cost and management cost that the types of parts used are fewer. Also, it is preferable that the assembled furniture has higher strength. 【0006】 An object of this invention is to provide an assembled furniture structure, a post, a bar, a structural board, and a top member that can constitute assembled furniture having high strength by combining a relatively small number of types of parts. 【Means for Solving the Problems】 【0007】 <无数の The assembly furniture structure of the first invention comprises at least four posts used in a substantially vertical position, at least four bars used in a substantially horizontal position, eight or more joints formed in a substantially rectangular prism shape for assembling the posts and bars, and at least one substantially rectangular structural plate having four bent portions that bend from each side along the bars or posts, the posts are provided with a plurality of post fixing portions having first holes with screw holes for fixing joints and second holes with screw holes provided near the first holes, the bars are provided with bar fixing holes which are through holes provided near the ends and third holes with screw holes for fixing structural plates The assembly furniture structure is provided such that the joint has a joint hole portion with a screw hole formed on at least one side, the joint can be fixed to the post fixing portion of the post by screw, the bar can be fixed to the joint by screw passing through the bar fixing hole while positioned to cover the joint fixed to the post, and the bent portion of the structural board has a board fixing portion formed therein, which is a board fixing hole into which screws can be placed, so that when the structural board is positioned as a shelf board, the three bent portions can each be screwed into the third hole, and when the structural board is positioned as a back board, the three bent portions can each be screwed into the second hole and the third hole, respectively. 【0008】 This configuration allows for high strength to be achieved by using the structural board as the back panel, and also enables the common use of parts by sharing the structural board as both the shelf and back panel. 【0009】 Furthermore, the assembly furniture structure of this second invention, compared to the first invention, includes an angle member that can be fixed to the part where the post and bar are fixed and supports the bar relative to the post, the joint holes are provided on three of the four sides of the joint, the bar fixing holes are formed on the side of the bar, the end of the bar has a notch that exposes the lower side of the joint, and the angle member is configured to be screwed into both the joint hole on the lower side of the joint and the second hole provided below the first hole in the post fixing part. 【0010】 This configuration allows the angle members to more reliably support the position of the bar relative to the post, thereby achieving high strength. 【0011】 Furthermore, the assembly furniture structure of this third invention is configured such that, compared to the second invention, the portion of the angle member facing the lower surface of the joint is housed in a notch. 【0012】 This configuration makes it possible to avoid compromising the aesthetic appeal of the furniture even when angle members are attached. 【0013】 Furthermore, the assembly furniture structure of the fourth invention, compared to the second invention, has a structural board that, as a bent portion, has two first bent portions that bend from two first opposite sides and two second bent portions that bend from two second opposite sides, and both of the two first bent portions have a defect near the end closest to one of the two second opposite sides, and the two second bent portions each have a defect near both ends, and when the structural board is arranged as a back plate, the joint hole portion and the area near the second hole portion to which the angle member can be attached are exposed without being covered by the bent portion of the structural board, thus forming an assembly furniture structure. 【0014】 This configuration allows the structural board to be used as a back panel with the angle members attached, thereby increasing the strength of the furniture. 【0015】 Furthermore, the assembly furniture structure of this fifth invention is an assembly furniture structure in which, compared to the first invention, the bar is provided with a fourth hole portion having a screw hole for attaching a joint, and the third hole portion is provided in the vicinity of the fourth hole portion. 【0016】 This configuration allows joints to be attached to the bars, enabling them to be combined with other bars and creating a wider variety of modular furniture for different uses. 【0017】 Furthermore, the assembly furniture structure of the sixth invention is configured such that, compared to the first invention, when the posts, bars, joints, and structural boards are assembled and the positions where the central axis of the post or bar to which the joint is attached intersects with the central axis of the joint are called the reference positions, the distance between the reference position on the post and the second hole, the distance between the reference position on the bar and the third hole, and the distance between the reference position on the structural board and the board fixing portion are substantially the same. 【0018】 This configuration increases the versatility of the layout of each component, allowing for the creation of a wider variety of modular furniture configurations using a limited number of parts. 【0019】 Furthermore, the assembly furniture structure of the seventh invention is an assembly furniture structure that, in contrast to the sixth invention, has four bars at the same height arranged between four posts so that in a plan view the posts form a rectangle with the posts as each vertex, the two bars that form opposite sides in a plan view have a length approximately twice that of a predetermined standard length, and the distance from each end of the bar to the standard position corresponding to each third hole is configured to correspond to the standard length. 【0020】 This configuration allows for the creation of a wider variety of modular furniture using a limited number of parts. 【0021】 Further, the prefabricated furniture structure of the eighth invention is a prefabricated furniture structure in which, with respect to the seventh invention, in the post, two or more post fixing parts are arranged so as to be aligned in the vertical direction with respect to each other, and the interval between each pair of first hole parts corresponds to a reference length. 【0022】 With such a configuration, it is possible to configure prefabricated furniture with various configurations using a limited number of types of parts. 【0023】 Further, the prefabricated furniture structure of the ninth invention is a prefabricated furniture structure in which, with respect to the seventh invention, two first opposite sides of the structural board have dimensions corresponding to a reference length, and the other two second opposite sides of the structural board have dimensions corresponding to an integer multiple of the reference length. 【0024】 With such a configuration, it is possible to configure prefabricated furniture with various configurations using a limited number of types of parts. 【0025】 Further, the prefabricated furniture structure of the tenth invention is a prefabricated furniture structure in which, with respect to the ninth invention, the dimension of the second opposite side corresponds to a value obtained by multiplying the reference length by N and converting it to a dimension obtained by multiplying the bar thickness dimension by a number obtained by subtracting 1 from N. 【0026】 With such a configuration, it is possible to configure prefabricated furniture with various configurations using a limited number of types of parts. 【0027】 Further, the prefabricated furniture structure of the eleventh invention is a prefabricated furniture structure in which, with respect to the ninth invention, the dimensions of the first opposite side and the second opposite side are each slightly smaller than the lengths of the corresponding bars, and in a state where the structural board is fixed by screws as a back board or a shelf board, a plurality of bars or posts to which the structural board is fixed are configured to be attracted to each other by the fixing of the structural board. 【0028】 With such a configuration, by applying a force between the members to which the structural board is fixed, it is possible to configure a prefabricated furniture with less rattling and high strength. 【0029】 Furthermore, the assembly furniture structure of the twelfth invention is an assembly furniture structure in which the posts and bars are square tubes and have the same outer diameter as the first invention. 【0030】 This configuration allows for the creation of a wider variety of assembled furniture using a limited number of parts, and also enhances the aesthetic appeal of the assembled furniture. 【0031】 Furthermore, the assembly furniture structure of the thirteenth invention is an assembly furniture structure that, compared to the first invention, comprises a support member that can be fixed together with the bar to the joint hole of the joint, and a top member that can be attached to the support member, wherein the top member is configured to cover a portion of the upper surface of each adjacent bar in a plan view. 【0032】 This configuration allows for the creation of various types of modular furniture that have a top component and a pleasing appearance. 【0033】 Furthermore, the assembly furniture structure of the fourteenth invention comprises at least four posts used in a substantially vertical position, at least four bars used in a substantially horizontal position, eight or more joints formed in a substantially rectangular prism shape for assembling the posts and bars, and at least one substantially rectangular structural plate having four bent portions that bend from each side along the bars or posts, the posts are provided with a plurality of post fixing portions having a first fixing portion for fixing the joints and a second fixing portion provided near the first fixing portion, the bars are provided with bar fixing portions provided near the ends and structural plates The assembly furniture structure is provided with a third fixing part for fixing the joint, the joint has a joint hole formed on at least one side, the joint is configured to be fixable to the post fixing part, the bar is fixed to the joint by the bar fixing part with its end positioned to cover the joint fixed to the post, and the bent parts of the structural board are configured such that when the structural board is placed as a shelf board, the three bent parts can each be fixed to the third fixing part, and when the structural board is placed as a back board, the three bent parts can each be fixed to the second fixing part and the third fixing part. 【0034】 This configuration allows for high strength to be achieved by using the structural board as the back panel, and also enables the common use of parts by sharing the structural board as both the shelf and back panel. [Effects of the Invention] 【0035】 According to the present invention, the prefabricated furniture structure allows for the construction of highly strong prefabricated furniture by combining a relatively small number of types of parts. [Brief explanation of the drawing] 【0036】 [Figure 1] A perspective view showing a first example of a prefabricated furniture using the prefabricated furniture structure according to this embodiment. [Figure 2] Perspective view showing a piece of prefabricated furniture related to a second example of a prefabricated furniture structure. [Figure 3]A perspective view showing a basic configuration example of the prefabricated furniture structure according to this embodiment. [Figure 4] Front view showing an example of a post [Figure 5] Front view showing an example of a bar [Figure 6] Bottom view showing an example of a bar [Figure 7] Perspective view showing the joint [Figure 8] Perspective view illustrating an assembly structure using joints. [Figure 9] Perspective view illustrating the mounting structure of angle members. [Figure 10] Perspective view showing the structural panel [Figure 11] Plan view showing the structure of prefabricated furniture when structural boards are attached as shelves. [Figure 12] Front view showing the structure of prefabricated furniture when a structural panel is attached as a back panel. [Figure 13] Perspective view showing an example of a large structural panel. [Figure 14] Perspective view showing an example of a long bar. [Figure 15] Perspective view showing an example of a long structural panel. [Figure 16] Perspective view showing an example of a fixing plate. [Figure 17] A diagram explaining different types of mailboxes. [Figure 18] Plan view showing the top component [Figure 19] Plan view of the assembled furniture relating to the second configuration example. [Figure 20] Plan view of the prefabricated furniture relating to the third configuration example. [Figure 21] Perspective view of the prefabricated furniture according to the fourth configuration example. [Figure 22] Perspective view of the assembled furniture according to the fifth configuration example. [Figure 23] Perspective view of the assembly furniture relating to the sixth configuration example. [Figure 24] Perspective view of the assembly furniture according to the seventh configuration example. [Figure 25] Perspective view of the assembled furniture according to the eighth example of configuration. [Modes for carrying out the invention] 【0037】 The embodiments of the prefabricated furniture structure and the like will be described below with reference to the drawings. In the embodiments, components denoted by the same reference numerals have the same or similar configurations, and therefore, further explanation may be omitted. 【0038】 In the following explanation, the coordinates shown in the drawings are common to all drawings. The Z direction of the coordinates is perpendicular to the horizontal plane. The X direction is perpendicular to the Z direction. The Y direction is perpendicular to both the Z and X directions. The Z direction may also be referred to as the up-down direction (the direction where the Z axis is positive from the origin is up), the X direction as the front-back direction (the direction where the X axis is positive from the origin is back), and the Y direction as the left-right direction (the direction where the Y axis is positive from the origin is left). In the following, these directions may be used to explain the shape and positional relationships of each part, but the indication of directions is merely for the convenience of explanation and does not limit the orientation or posture of the structure, each component, etc., when used according to the present invention. Furthermore, expressions indicating direction, or states such as horizontal, vertical, orthogonal, only indicate that they can be understood in a general way, and should not necessarily be interpreted strictly according to those expressions. 【0039】 (Embodiment) 【0040】 The outline of this embodiment is as follows. The prefabricated furniture structure is made up of members (components) such as posts, bars, joints, and roughly rectangular structural boards. The bars can be fixed to joints which are fixed to posts. The posts and bars are provided with fixing parts that can be fixed to the bent parts on each side of the structural board. The structural board can be arranged as a shelf board or a back board. Whether the structural board is arranged as a shelf board or a back board, the three bent parts of the structural board are configured to be fixed to the fixing parts. 【0041】 The prefabricated furniture structure may further include angle members attached to the joint between the post and the bar to support the components. 【0042】 The assembly furniture structure may include a top member positioned on the top surface using support members attached to bars. 【0043】 The following describes the structure of the prefabricated furniture, which is configured in this way. 【0044】 Furthermore, a prefabricated furniture structure can be defined as a structure used in prefabricated furniture made by assembling various components. Prefabricated furniture having such a structure may also be called a prefabricated furniture structure. Prefabricated furniture may have other components in addition to the components described below. 【0045】 Figure 1 is a perspective view showing a piece of assembled furniture 101 according to a first configuration example using the assembled furniture structure 1 according to this embodiment. Figure 2 is a perspective view showing a piece of assembled furniture 102 according to a second configuration example using the assembled furniture structure 1. 【0046】 Figures 1 and 2 show a simplified representation of the structure of prefabricated furniture. Specifically, column and beam-like members are represented by line segments, and boards by rectangular shapes. Similar representations may be used in other figures described later. 【0047】 As shown in Figure 1, the prefabricated furniture 101 according to the first configuration example is what is commonly known as kitchen furniture or a system kitchen. The prefabricated furniture 101 is constructed using the prefabricated furniture structure 1 according to this embodiment, and is equipped with a top component 60 such as a work counter 61, sink 62, and stove 64, and can be said to be configured in such a way that units with different functions are arranged in series. 【0048】 As shown in Figure 2, the prefabricated furniture 102 according to the second configuration example is kitchen furniture constructed using the same prefabricated furniture structure 1 as the prefabricated furniture 101 according to the first configuration example. Unlike the prefabricated furniture 101 according to the first configuration example, the prefabricated furniture 102 according to the second configuration example can be said to be constructed in which units having the same or different functions are arranged in an L-shape. 【0049】 The following describes a basic configuration example of the prefabricated furniture structure 1 according to this embodiment. Such prefabricated furniture 101 and 102 can be constructed by combining various components that can constitute the prefabricated furniture structure 1. 【0050】 Figure 3 is a perspective view showing a basic configuration example of the prefabricated furniture structure 1 according to this embodiment. 【0051】 As shown in Figure 3, in this embodiment, the prefabricated furniture structure 1 comprises a post 10, a bar 20, a joint 30, and a structural board 40. Although not shown in Figure 3, the prefabricated furniture structure 1 may also include angle members 50 (shown in Figure 8), support members 55, and top members 60 (shown in Figure 17, etc.), which will be described later. To assemble these members in the prefabricated furniture structure 1, for example, member assembly screws 8 (hereinafter sometimes simply referred to as screws 8) or joint connecting screws 9 shown in Figure 16, etc., can be used. 【0052】 The prefabricated furniture structure 1 shown in Figure 3 includes, for example, four posts 10, thirteen bars 20, and 26 joints, and these components are combined to form a rectangular prism-shaped frame. In plan view, the four posts 10 are located at each vertex of the rectangle, and each bar 20 is arranged to form each side of the rectangle. Here, the length of each bar 20 is equal. Two structural boards 40 are arranged on the rectangular prism-shaped frame, for example, to form shelves or to form a back panel. 【0053】 Figure 4 is a front view showing an example of post 10. 【0054】 As shown in the figure, post 10 is a columnar member used in a substantially vertical position. Post 10 is formed from a hollow square tube. In this embodiment, the cross-sectional shape of the outer shape of post 10 is substantially square. Four or more posts 10 are required in the prefabricated furniture structure 1. 【0055】 The post 10 is provided with multiple post fixing parts 11. The post fixing parts 11 can be described as parts for fixing the bar 20 to the post 10 via the joint 30, or for fixing the structural plate 40 or angle member 50. In this embodiment, on a specific side of the post 10, three post fixing parts 11 are provided so as to be arranged at approximately equal intervals along the vertical direction (longitudinal direction of the post 10). In the assembly furniture structure 1 shown in Figure 3, the post 10 used has three post fixing parts 11 on each of the two sides of the post 10 that are arranged in the circumferential direction. On the faces on which the post fixing parts 11 are provided, the position of each post fixing part 11 in the downward direction is approximately the same. That is, when the post 10 is in a substantially vertical position, two post fixing parts 11 on different faces in the circumferential direction are at approximately the same height. 【0056】 The post fixing portion 11 has a first hole portion 12 for fixing the joint 30 to the post 10, and a second hole portion 15 provided near the first hole portion 12. In this embodiment, the first hole portion 12 includes a screw hole 13 into which a joint connecting screw 9 for fixing the joint 30 is inserted (screwed in), and an engagement hole 14 into which the joint 30 engages. In this embodiment, the second hole portion 15 has two screw holes 16 arranged vertically at a predetermined interval. Screws 8 for fixing the structural plate 40 or the angle member 50 can be inserted into the screw holes 16. The engagement hole 14 is a hole formed above and below the screw hole 13, respectively, so as to sandwich the screw hole 13. 【0057】 In this embodiment, the post fixing portion 11 includes two second holes 15, except for the uppermost portion. The two second holes 15 are positioned above and below the first hole 12, respectively, so as to sandwich the first hole 12. In this embodiment, the two second holes 15 are positioned symmetrically with respect to a plane perpendicular to the vertical direction passing through the first hole 12. The screw holes 13 and 16 on each side of the post 10 are aligned with respect to the center of the width direction of that side. The distance between the screw hole 13 of the first hole 12 and the screw hole 16 of the vertically adjacent second hole 15 is configured to be the same in all post fixing portions 11. 【0058】 In this embodiment, a second hole 15 is provided near the lower end of the post 10. The distance between this second hole 15 and the lower second hole 15 of the post fixing part 11 above it is the same as the distance between the second holes 15 of two other adjacent post fixing parts 11. 【0059】 Figure 5 is a front view showing an example of bar 20. Figure 6 is a bottom view showing an example of bar 20. 【0060】 The bar 20 is a beam-like member used in a nearly horizontal position. The bar 20 is formed from a hollow square tube. In this embodiment, the cross-sectional shape of the bar 20 is nearly square. The bar 20 and the post 10 have the same outer dimensions. That is, the outer shapes of the bar 20 and the post 10 are nearly identical, resulting in an aesthetically pleasing appearance when assembled as flat-pack furniture. Four or more bars 20 are required in one flat-pack furniture structure 1. 【0061】 In this embodiment, the bar 20 has bar fixing portions 21 at both ends and third holes 25 provided in the middle. Here, the middle refers to the portion excluding both ends and is not limited to the center. Two third holes 25 are provided at two locations on the lower surface of the bar 20, aligned along the left-right direction (longitudinal direction) of the bar 20. In addition, two third holes 25 are provided on one of the side surfaces of the bar 20 (referred to here as the front) aligned in the left-right direction. The positions of the third holes 25 in the left-right direction are approximately the same on surfaces where the third holes 25 are provided. 【0062】 In this embodiment, the third hole portion 25 has two screw holes 26 arranged at a predetermined interval from left to right. Screws 8 for fixing the structural plate 40 or angle member 50 can be inserted into the screw holes 26. The distance between the two screw holes 26 in the third hole portion 25 is equal to the distance between the two screw holes 16 in the second hole portion 15. 【0063】 A fourth hole 27 is provided on the front of the bar 20 for fixing the joint 30 to the post 10. Similar to the first hole 12, the fourth hole 27 includes a screw hole 28 into which a joint connecting screw 9 for fixing the joint 30 can be inserted, and an engagement hole 29 into which the joint 30 can engage. The engagement hole 29 is a hole formed above and below the screw hole 28, so as to sandwich the screw hole 28. Since such a fourth hole 27 is provided on the bar 20, the joint 30 can be attached to the bar 20 and combined with other bars 20. 【0064】 On the front of the bar 20, the two third holes 25 are located near the fourth hole 27. The two third holes 25 are positioned on either side of the fourth hole 27, respectively. In this embodiment, the two third holes 25 are positioned symmetrically with respect to a plane perpendicular to the left-right direction passing through the fourth hole 27. The screw holes 26 and 28 on the front or bottom surface of the post 10 are aligned with respect to the center of the width direction of that surface. The distance between the screw hole 28 of the fourth hole and the screw hole 26 of the adjacent third hole 25 in the left-right direction is configured to be the same as the distance between the screw hole 13 of the first hole 12 and the screw hole 16 of the adjacent second hole 15 in the vertical direction. The set of the fourth hole 27 and the third hole 25 arranged in this manner can be called the intermediate fixing part 24. The configuration of the intermediate fixing portion 24 is the same as that of the post fixing portion 11, except that the arrangement of the engagement holes 29 differs from the arrangement of the engagement holes 14 of the post 10. In this embodiment, the intermediate fixing portion 24 is provided so as to be located in the screw holes 28 of the bar 20, but it is not limited to this configuration. 【0065】 The bar fixing portion 21 is located at each end of the bar 20. The bar fixing portion 21 has bar fixing holes 22. In this embodiment, the bar fixing portion 21 has two bar fixing holes 22 arranged at a predetermined interval from left to right. The two bar fixing holes 22 are provided on the front of the bar 20. The bar fixing holes 22 are through holes through which the shaft portion of a screw 8, which is inserted into the joint 30 to fix the bar 20 to the joint 30, can pass. The distance between the two bar fixing holes 22 is approximately equal to the distance between the two screw holes 16 of the second hole portion 15. It can also be said that the bar fixing holes 22 are formed in positions corresponding to the joint hole portion 35 of the joint 30, which will be described later. 【0066】 In this embodiment, the bar fixing portion 21 is provided with a notch 23. The notch 23 is a portion of the outer surface of the bar 20 that is removed from the end of the bar 20 toward the center. The notch 23 is formed on the bottom surface of the bar 20. As a result of the provision of the notch 23, when the bar 20 is fixed to the joint 30 as described later, at least a portion of the lower surface (bottom surface) of the joint 30 is not covered by the bar 20. That is, the end of the bar 20 is provided with a notch 23 that exposes the lower surface of the joint 30. 【0067】 Figure 7 is a perspective view showing joint 30. 【0068】 In Figure 7, for convenience, the longitudinal direction of the joint 30 is assumed to be the left-right direction, and the slit portion 34, which will be described later, is assumed to be at the top. In the following, the side surfaces of the joint 30 can be said to be the top surface, bottom surface, front surface, and back surface of the joint 30. 【0069】 The joint 30 is formed in a roughly rectangular prism shape. The joint 30 is a component for assembling the post 10 and the bar 20. As described above, it may also be used to assemble one bar 20 with another bar 20 using the fourth hole 27. There should be eight or more joints 30 in one assembled furniture structure 1. 【0070】 The joint 30 has a mounting portion 31 provided at one end in the longitudinal direction and a slit portion 34 formed on its upper surface. The slit portion 34 is formed along the longitudinal direction, starting from a position away from the mounting portion 31 and reaching an end different from the end where the mounting portion 31 is provided. The presence of the slit portion 34 allows for easy casting of a joint 30 having such a shape. 【0071】 The mounting portion 31 has a coupling hole 32 provided in the center of the end of the joint 30, and projections 33 formed above and below the coupling hole 32. The coupling hole 32 is a through hole through which the shaft portion of the joint coupling screw 9, which is inserted into the screw hole 13 of the first hole portion 12 and the screw hole 28 of the fourth hole portion 27, can pass. The projections 33 are portions that protrude outward in the longitudinal direction (to the left) from the end face of the end of the joint 30. The projections 33 have a shape that corresponds to the engagement hole 14 of the first hole portion 12 and the engagement hole 29 of the fourth hole portion 27. The joint 30 is configured such that the end face of the joint 30 can contact the post fixing portion 11 and the intermediate fixing portion 24 when the two upper and lower projections 33 are fitted into (engaged) the engagement holes 14 and 29. The position of the joint 30 relative to the post 10 and the bar 20 is maintained when the projections 33 are fitted into the engagement holes 14 and 29. This makes it easy to properly secure the joint 30 to the post 10 and bar 20 using the joint connecting screw 9. 【0072】 The joint 30 also has a joint hole 35 provided on its side surface. The joint hole 35 only needs to be provided on at least one side surface of the joint 30. In this embodiment, the joint hole 35 is provided on three sides, excluding the top surface. 【0073】 The joint hole 35 has two screw holes 36 arranged at a predetermined interval from left to right. Screws 8 for fixing the bar 20 or angle member 50 can be inserted into the screw holes 36. The distance between the two screw holes 26 in the joint hole 35 is equal to the distance between the two screw holes 16 in the second hole 15. The joint hole 35 is positioned in a location corresponding to the bar fixing hole 22 of the bar fixing part 21. 【0074】 Figure 8 is a perspective view illustrating the assembly structure using joint 30. 【0075】 Figure 8 shows the connection point between the post 10 and the bar 20. In this embodiment, the joint 30 is attached to the part of the post fixing portion 11 of the post 10 to which the bar 20 is to be connected. That is, the joint 30 is positioned so that the projection 33 fits into the engagement hole 14 in the first hole portion 12 of the post fixing portion 11. The joint 30 is then fixed to the post fixing portion 11 by inserting the joint connecting screw 9 into the screw hole 31 inserted from the inside of the joint 30. The joint 30 may also be called a spigot. 【0076】 The bar 20 is positioned to cover the joint 30 fixed to the post 10. It can also be said that the joint 30 is inserted inside the bar fixing portion 21. In this state, the bar 20 is fixed to the joint 30 by inserting the screw 8 through the bar fixing hole 22 of the bar fixing portion 21 and into the screw hole 36 of the joint hole portion 35. In other words, the bar 20 can be fixed to the joint 30 by the bar fixing portion 21 with its end positioned to cover the joint 30 fixed to the post 10. 【0077】 In this manner, at each point where the bar 20 is assembled to the post 10, the angle member 50 can be attached from the underside of the bar 20, that is, from the underside of the joint 30. In other words, the angle member 50 is a member that can be fixed to the point where the post 10 and the bar 20 are fixed, and supports the bar 20 with respect to the post 10. 【0078】 In this embodiment, a fitting bent approximately vertically and formed in an L-shape overall can be used as the angle member 50. The angle member 50 has a vertical portion 51 and a horizontal portion 52. Each of the vertical portion 51 and the horizontal portion 52 is provided with a hole 53 located at a position corresponding to the screw holes 16 and 36. That is, the angle member 50 is positioned such that the vertical portion 51 follows the second hole portion 15 and the horizontal portion 52 follows the lower surface of the joint 30 exposed from the notch portion 23. The screw 8 is then inserted into the screw holes 16 and 36 through the hole 53 to fix it in place. In other words, the angle member 50 is configured to be screwed into both the joint hole portion 35 on the lower surface of the joint 30 and the second hole portion 15 provided below the first hole portion 12 in the post fixing portion 11. 【0079】 Figure 9 is a perspective view illustrating the mounting structure of the angle member 50. 【0080】 As shown in Figure 9, in this embodiment, with the angle member 50 fixed to the part where the post 10 and the bar 20 are fixed, at least a portion of the upper part of the horizontal section 52 is embedded in the part where the notch 23 is formed. In other words, the notch 23 has a shape corresponding to the horizontal section 52. It can also be said that the part of the angle member 50 facing the lower surface of the joint 30 is configured to be housed in the notch 23. In this way, since the horizontal section 52 of the angle member 50 is housed in the notch 23, the strength of the assembled furniture structure 1 can be ensured by attaching the angle member 50, and the angle member 50 can be prevented from protruding below the bottom surface of the bar 20, thus preventing the aesthetic appearance of the furniture from being compromised. 【0081】 Next, we will describe the structure of the structural panel 40 and its mounting structure. 【0082】 Figure 10 is a perspective view showing the structural panel 40. 【0083】 As shown in Figure 10, the structural plate 40 is at least one substantially rectangular plate material. That is, the structural plate 40 has two first opposite sides 41 and two second opposite sides 42. For convenience, in the following description, the second opposite sides 42 will be assumed to be either the longer side or the same length as the first opposite sides 41. Also, in Figure 10, for convenience, the direction along the second opposite sides 42 will be assumed to be the left-right direction, the bent portions 43 and 44 described later will be assumed to be bent downwards, and the missing portion 45 of the first bent portion 43 will be assumed to be in front. 【0084】 The structural plate 40 has four bent portions 43, 44 that bend from each side 41, 42. In this embodiment, the structural plate 40 has two first bent portions 43 that bend from two first opposite sides 41, and two second bent portions 44 that bend from two second opposite sides 42. Each bent portion 43, 44 is a part that bends along the bar 20 or post 10 when the structural plate 40 is placed in a desired position. 【0085】 Each of the folded portions 43 and 44 has a missing portion 45 in part. The missing portion 45 can be described as the part of each side 41 and 42 that does not correspond to the folded portion 43 or 45. Because the missing portion 45 is provided in part, the length of the folded portion 43 or 44 in the direction parallel to the side corresponding to that folded portion 43 or 44 is shorter than the length of the corresponding side. In this embodiment, each of the two first folded portions 43 has a missing portion 45 near the end closest to one of the two second opposite sides 42 (the front second opposite side 42 in Figure 10). In other words, the missing portion 45 is provided in the front part of each first folded portion 43. Also, the two second folded portions 44 have missing portions 45 near both ends. That is, the missing portions 45 are provided on both the left and right sides of each second folded portion 44. 【0086】 The bent portions 43 and 44 are provided with plate fixing portions 47. Each plate fixing portion 47 has two plate fixing holes 48, which are through holes through which screws 8 can be inserted. In each plate fixing portion 47, the distance between the two plate fixing holes 48 is approximately equal to the distance between the screw holes 16 in the second hole portion 15 and the distance between the screw holes 26 in the third hole portion 25. Preferably, the plate fixing holes 48 are elongated in the horizontal direction, and this configuration can absorb errors that occur during assembly, etc. 【0087】 The positions of each plate fixing part 47 are set as follows so that one structural plate 40 can be used as both a shelf and a back panel. Specifically, when the structural plate 40 is attached to the bar 20 and used as a shelf, the third hole 25 of the bar 20 is positioned to correspond to one of the plate fixing parts 47. Also, when the structural plate 40 is attached to the bar 20 and the post 10 and used as a back panel, the second hole 15 of the post 10 and the third hole 25 of the bar 20 are positioned to correspond to one of the plate fixing parts 47. More specifically, the bent parts 43 and 44 are provided with plate fixing parts 47 so that when the structural plate 40 is placed as a shelf, the three bent parts 43 and 44 can each be screwed into the third hole 25, and when the structural plate 40 is placed as a back panel, the three bent parts 43 and 44 can each be screwed into the second hole 15 and the third hole 25, respectively. In this embodiment, when the structural plate 40 is used as a back plate, the position of the plate fixing portion 47 of the first bent portion 43 is set such that the plate fixing portion 47 can be screwed into the upper second hole portion 15 of the post fixing portion 11 located below the structural plate 40. 【0088】 Figure 11 is a plan view showing the assembly furniture structure 1 when the structural board 40 is attached as a shelf board. Figure 12 is a front view showing the assembly furniture structure 1 when the structural board 40 is attached as a back panel. 【0089】 In Figures 11 and 12, components such as the bars 20, posts 10, and screws 8 that are parallel to the plane of the paper are shown with dashed lines to facilitate distinction from the structural plate 40. 【0090】 As shown in Figure 11, when a structural board 40 is attached as a shelf to the prefabricated furniture structure 1, another bar 20 is attached between two bars 20 that are opposite each other using a joint 30. Then, the structural board 40 can be placed in each of the two sections separated by the five bars 20. The structural board 40 is fixed to the bar 20 corresponding to the long side of each section by screwing the board fixing part 47 of the second bent part 44 into the third hole 25. In addition, the other two bars 20 are fixed by screwing the board fixing part 47 of the first bent part 43 into the third hole 25 of the intermediate fixing part 24. In this way, each of the four sides can be fixed to the bar 20, so that each structural board 40 can be securely fixed. 【0091】 Furthermore, since the structural plate 40 has a missing portion 45, the missing portion 45 can be positioned in the area where the screw 8 connecting the bar 20 and the joint 30 is located, and the presence of the screw 8 does not affect the attachment of the structural plate 40. 【0092】 Furthermore, as shown in Figure 12, when a structural board 40 is attached to the prefabricated furniture structure 1 as a back panel, the structural board 40 is attached directly below a bar 20 that spans between two posts 10. The structural board 40 is fixed to the bar 20 by screwing the board fixing part 47 of the second bent part 44 into a third hole 25 provided on the lower surface of the bar 20. The structural board 40 is also fixed to the post 10 by screwing the board fixing part 47 of the first bent part 43 into the second hole 15 of the post fixing part 11 located on the lower side of the structural board 40. In this way, each of the three sides can be fixed to the bar 20, so that each structural board 40 can be securely fixed and the structural board 40 can be used as a member equivalent to a brace. 【0093】 Furthermore, since the structural plate 40 has a defect 45, when the structural plate 40 is positioned as a back plate in this manner, the areas near the joint hole 35 and the second hole 15 to which the angle member 50 can be attached remain exposed without being covered by the bent portions 43 and 44 of the structural plate 40. The presence of the joint 30 does not affect the attachment of the structural plate 40, and the order in which the joint 30 is attached and the attachment of the structural plate 40 do not matter. 【0094】 Furthermore, when the structural board 40 is assembled and used in this manner, the dimensions of the first opposite side 41 and the second opposite side 42 are slightly smaller than the lengths of the corresponding bars 20. As a result, when the structural board 40 is fixed as a back panel or shelf board with screws 8, the multiple bars 20 or posts 10 to which the structural board 40 is fixed are arranged to be attracted to each other by the fixing of the structural board 40. This allows force to act between each component to which the structural board 40 is fixed, making it possible to construct a prefabricated furniture that is less loose and has high strength. 【0095】 In this embodiment, the post 10 and the bar 20 are, for example, square steel pipes with a width of 22 mm. Their respective thicknesses are, for example, about 1 mm to 2 mm, but are not limited to this. The thickness of the post 10 and the thickness of the bar 20 may be different. The material does not have to be iron. The joint 30 is, for example, made of die-cast metal, but the material and manufacturing method are not limited to this. The joint 30 has a square prism shape and external dimensions corresponding to the thickness of the bar 20. 【0096】 Furthermore, the structural plate 40 is made of, for example, a steel plate, but is not limited to this. It may be made of other metal plates, or, for example, a resin plate. The bent portion can be said to be the part of the structural plate 40 that has a surface that is bent from the main surface. The structural plate 40 as a whole only needs to have a bent portion that follows the bar 20 or post 10. 【0097】 Furthermore, for the structural board 40, bar 20, and post 10 used in the prefabricated furniture structure 1, variations in dimensions and other characteristics may be used. 【0098】 Figure 13 is a perspective view showing an example of a large structural panel 40W. 【0099】 As shown in Figure 13, the large structural panel 40W is larger than the structural panel 40 described above. The large structural panel 40W is roughly square in shape, with all four sides having the same dimensions as the second opposite side 42 of the structural panel 40. Furthermore, at the bent portion of each side, a panel fixing portion 47 and a cut portion 45 are provided, similar to the second opposite side 42 of the structural panel 40. In Figure 13, each side and each bent portion are shown as the second opposite side 42 and the second bent portion 44. In order to ensure rigidity, a rib 49 is formed in the center, extending downwards. 【0100】 The large structural panel 40W can be directly installed into a roughly square-shaped section enclosed by four bars 20. It can also be used as a back panel. 【0101】 Figure 14 is a perspective view showing an example of a 20L long bar. 【0102】 As shown in Figure 14, the long bar 20L is longer than the bar 20 described above. Specifically, the length of the long bar 20L is approximately twice the length of the bar 20. In the long bar 20L, an intermediate fixing portion 24 is provided in the center. In addition, third holes 25 are provided in two central portions between the end and the center of the long bar 20L. The dimension from each end to the third hole 25 closest to that end is configured to be the same as the dimension of the bar 20. 【0103】 The Long Bar 20L can be used when you want to secure a longer horizontal span. 【0104】 Figure 15 is a perspective view showing an example of a 40L long structural panel. 【0105】 As shown in Figure 15, the long structural plate 40L has approximately twice the dimensions in the left-right direction compared to the structural plate 40 described above. That is, the long structural plate 40L has a second opposite side 42L that is approximately twice the length of the second opposite side 42 described above. The second bent portion 44L of the second opposite side 42L has missing portions 45 at both the left and right ends. The plate fixing portions 47 of the second bent portion 44L are provided at two locations on the left and right so that the distance from each end is the same as the distance at the second bent portion 44. In order to ensure rigidity, ribs 49 are formed in the left and right center, facing downwards. 【0106】 The 40L long structural board can be used in sections constructed using the 20L long bar. The 40L long structural board can also be used as a shelf or as a back panel. 【0107】 Figure 16 is a perspective view showing an example of a fixing plate 80. 【0108】 As shown in Figure 16, the fixing plate 80 is a rectangular plate material whose main surface is approximately the same dimensions as the structural plate 40, but it can be attached to the bar 20 at the folded-over portions 84 formed at two locations on its long side. That is, the folded-over portions 84 are parts that are bent to follow the two sides of the bar 20 along the long side. When the fixing plate 80 is used in a horizontal position, the portion of the folded-over portion 84 that is approximately parallel to the main surface follows the bottom surface of the bar 20. When the fixing plate 80 is used as a skirting plate in a vertical position, the portion of the folded-over portion 84 that is approximately parallel to the main surface follows the side of the bar 20. A plate fixing portion 87 having a plate fixing hole 88 is formed in the portion of the folded-over portion 84 that is approximately parallel to the main surface, at a position corresponding to the third hole portion 25 provided in the bar 20. Cut-out portions 85 are provided at both ends of the long side of the folded-over portion 84. The presence of the missing portion 85 prevents the folded portion 84 from interfering with the screws 8 used to fix the bar 20 to the joint 30, or with the mounting portion of the angle member 50. 【0109】 The fixing plate 80 can be attached more easily than the structural plate 40, and can be used in place of the structural plate 40 when the strength of the assembled furniture structure 1 can be ensured by other means, or in parts where high load-bearing capacity or strength is not required. 【0110】 Figure 17 is a diagram illustrating the different types of post 10. 【0111】 Figure 17 illustrates three different types of posts 10. In this embodiment, the structures of three types of posts 10 with different arrangements of the post fixing portion 11 are shown. That is, in this embodiment, L-post 10L, T-post 10T, and X-post 10X can be used as posts 10. 【0112】 The L-post 10L is a post 10 that has post fixing parts 11 on two adjacent sides. The L-post 10L can connect bars 20 in two directions that form a right angle in a plan view. 【0113】 The T-post 10T is a post 10 that has post fixing parts 11 on three sides. The T-post 10T can be connected to bars 20 in all directions except one. 【0114】 The X-post 10X is a post 10 that has post fixing parts 11 on all four sides. The X-post 10X can be connected to bars 20 in all four directions. 【0115】 By using three different types of posts 10, taking into account the desired layout, it is possible to create a neat and aesthetically pleasing piece of assembled furniture where holes are not provided on surfaces that do not require connection of bars 20. 【0116】 The length of post 10 can be set as appropriate. It is preferable to have a lineup of lengths corresponding to the standard length described later. 【0117】 In this embodiment, the dimensional relationships of the components constituting the prefabricated furniture structure 1 can be said to be specifically set as follows. 【0118】 First, for each of the post 10, bar 20, joint 30, and structural plate 40, the position where the central axis of the post 10 or bar 20 to which the joint 30 is attached intersects with the central axis of the joint 30, in a state where other attachable members are assembled in various ways, is called the reference position D. There can be multiple reference positions D when a certain assembly configuration is assumed. An example of a reference position D is partially shown in Figures 11 and 12. The central axis is the axis that runs along the longitudinal direction passing through the center of the member. Typically, the reference position D is the intersection of the central axes of the fixed posts 10 and the central axis of the bar 20, the intersection of the central axis of one bar 20 and the central axis of another bar 20, or the intersection of the central axes of two members along which the edge of the structural plate 40 runs. 【0119】 When the reference position D is determined in this way, the distance between the reference position D on the post 10 and the one or more second holes 15 closest to the reference position D, the distance between the reference position D on the bar 20 and the third hole 25 closest to the reference position D, and the distance between the reference position D on the structural plate 40 and the plate fixing part 47 closest to the reference position D can be said to be approximately the same as these distances. Furthermore, the distance between the reference position D on the joint 30 and the joint hole 35 closest to the reference position D can also be said to be the same as these distances. In this case, the positions of each hole 15, 25, 35 and the plate fixing part 47 can be specified as the central position if multiple screw holes or holes are provided, but they can also be specified as the position of a single screw hole or hole corresponding to each other in each part. 【0120】 Furthermore, the predetermined standard length is set to approximately half the length of the bar 20 in this embodiment. In other words, the bar 20 can be said to have approximately twice the length of the predetermined standard length. Note that, for example, if two types of members with different lengths, such as the bar 20 and the long bar 20L, are used, the standard length may be half the length of any two bars 20 that form opposite sides in a plan view among the four bars 20, 20L that are at the same height and arranged between the four posts 10 so that the posts 10 form a rectangle with the posts 10 as each vertex in a plan view. 【0121】 When the standard length is set in this way, the following can be said: 【0122】 In other words, the distance from the end of each bar 20 to the reference position D corresponding to the third hole 25, that is, the distance to the fourth hole 27, is the same as the standard length. In this embodiment, since the fourth hole 27 is located in the center of the bar 20, the distance from the end of the bar 20 to the reference position D near the third hole 25 is the same as the standard length. 【0123】 Furthermore, the distance between the first holes 12 of the post fixing parts 11, which are arranged vertically in the post 10, corresponds to the standard length. In this embodiment, the length obtained by subtracting the thickness dimension of the bar 20 from the distance between the first holes 12 is the same as the standard length. 【0124】 Furthermore, the two first opposite sides 41 of the structural plate 40 have dimensions corresponding to the standard length, and the other two second opposite sides 42 have dimensions corresponding to integer multiples of the standard length. In this embodiment, the length of the first opposite sides 41 is approximately the same as the standard length, and the length of the second opposite sides 42 is twice the standard length plus the thickness dimension of the bar 20. That is, it is preferable that the dimension of the second opposite sides 42 corresponds to the value obtained by multiplying the standard length by N (where N is an integer of 2 or more) and adding the value obtained by multiplying the thickness dimension of the bar 20 by (N-1). 【0125】 In this embodiment, a top member 60, depending on the intended use of the assembled furniture, can be attached to the uppermost part of each section of the assembled furniture structure 1. 【0126】 Figure 18 is a plan view of the top member 60. 【0127】 As shown in Figure 18, an example of a sink 62 is shown as the top member 60. The top member 60 has a rectangular shape, for example, with dimensions corresponding to the length of the bar 20 in a plan view. Mounting holes 66 into which screws can be inserted are provided near the four corners on the bottom side of the top member 60. 【0128】 The top member 60 is fixed using a support member 55. The support member 55 is a metal fitting that can be fixed together with the bar 20 to the joint hole 35 of the joint 30. The tip of the support member 55 is provided with a hole 56 through which a screw inserted into the mounting hole 66 of the top member 60 can pass. The top member 60 is fixed when it is placed on the assembled furniture structure 1 from above the support member 55, and the screw is inserted into the mounting hole 66 so as to pass through the hole 56. 【0129】 In this embodiment, when a reference position is assumed for the top member 60 in the same manner as described above, it is preferable that the dimensions from the reference position to the mounting hole 66 in the front-to-back direction and the left-to-right direction are both equal, and that they are the same as the distance between the reference position D in the joint 30 and the joint hole 35 closest to the reference position D. By doing so, the position where the support member 55 is attached can be either of the two bars 20 closest to each mounting hole 66, making assembly easy. 【0130】 Figure 19 is a plan view of the assembled furniture 102 according to the second configuration example. Figure 20 is a plan view of the assembled furniture 103 according to the third configuration example. 【0131】 In these figures, the top member 60 is shown by a dashed line. In the assembly furniture 102 according to the second configuration example, for example, a countertop 61, a sink 62, and a stove 64 are used as the top member 60. As described above, the assembly furniture 102, which forms an L-shape overall, is constructed by combining three types of posts 10. 【0132】 Furthermore, in the assembly furniture 103 relating to the third configuration example, for example, a cooking counter 61 and a long sink 63 are used as the top member 60. In other words, the top member 60 is not limited to a square shape in plan view. The long sink 63 is configured to be placed in a section formed using a long bar 20L. 【0133】 In this embodiment, the dimensions of each side of the top member 60 are slightly larger than the length of the corresponding bar 20. As a result, the outer edge of the top member 60 covers a portion of the upper surface of each adjacent bar 20 in a plan view. It can also be said that the top member 60 has an overlapping portion that overlaps a portion of the upper surface of each adjacent bar 20. This makes it possible to construct an assembled furniture that has a good appearance because the gap between the top member 60 and the bar 20 is not exposed, and which is less likely to allow foreign matter generated on the top member 60 to enter the interior. 【0134】 The following describes yet another example of a prefabricated furniture configuration using the prefabricated furniture structure 1 described above. In the following figures, the structure of the prefabricated furniture is shown in a simplified form, similar to Figures 1 and 2. 【0135】 Figure 21 is a perspective view of the assembled furniture 104 according to the fourth configuration example. 【0136】 The assembled furniture 104 is configured with four top members 61 arranged in series. Six posts 10 are connected in a row, three at the front and three at the back, via long bars 20L, allowing for the construction of long assembled furniture 104 with a small number of posts 10. In addition, the right-hand section does not have shelves except for the top members 61, and can be used as a dining table, for example, by placing stools on it. 【0137】 Figure 22 is a perspective view of the assembled furniture 105 according to the fifth configuration example. 【0138】 The assembled furniture 105 is configured with four top members 61 arranged in series. A tall long post 10L is used as the rear post 10, and a back panel can be placed on the rear side to form a wall. For the back panel, for example, a mesh structure board 40M in which wires are stretched in a grid or mesh pattern can be used, or a perforated structure board 40P with numerous punch holes can be used. These structure boards can also be used as shelves. 【0139】 Figure 23 is a perspective view of the assembled furniture 106 according to the sixth configuration example. 【0140】 Assembled furniture 106 is a piece of furniture that can be used as a tall storage rack. By using various types of long posts 10L, it is possible to create a structure that appears bent in plan view. 【0141】 Figure 24 is a perspective view of the assembled furniture 107 according to the seventh configuration example. 【0142】 Assembled furniture 107 is a piece of furniture that can be used as a desk or a table. No shelves are used; in addition to the countertop 61 which serves as the tabletop, a long structural board 40L is positioned in the center so as to hang down below the countertop 61. 【0143】 Figure 25 is a perspective view of the assembled furniture 108 according to the eighth configuration example. 【0144】 Assembled furniture 108 is a kitchen furniture piece constructed by alternatingly combining posts 10 and long posts 10L, resulting in an uneven surface when viewed from the side. In this way, by appropriately selecting the components to be combined, furniture with a desired configuration can be realized. 【0145】 As described above, in this embodiment, the versatility of the layout of each component can be increased, and various types of prefabricated furniture can be constructed using a limited number of parts. 【0146】 In other words, generally speaking, with flat-pack furniture, the more types of parts there are, the more complex the assembly becomes. Furthermore, it's often necessary to prepare parts of specific shapes and sizes for each type of furniture that can be assembled, making parts standardization difficult and increasing production costs and inventory management burdens. Additionally, to ensure strength and stability, it's necessary to prepare additional parts such as bracing, which also contributes to the problem of increasing the number and types of parts. 【0147】 In contrast, in this embodiment, by using the structural board 40 as both a shelf and a back panel, parts can be standardized, reducing production costs and improving inventory management efficiency. Furthermore, using the structural board 40 as a back panel increases the overall strength of the furniture. Additionally, reinforcing the joint between the post 10 and the bar 20 using the angle member 50 suppresses shaking and improves stability. Since the assembly method and position of each component are standardized, the assembly procedure is simplified and work efficiency is improved. Because each component is detachable with screws, it is possible to rearrange the configuration as needed by adding or changing components. 【0148】 (others) 【0149】 The present invention is not limited to the embodiments described above, and various modifications are possible, which are also included within the scope of the present invention. 【0150】 Embodiments may be constructed by appropriately combining the components of the embodiments and modifications described above. For example, the configuration is not limited to the embodiments described above, and each component of the embodiments and modifications described above may be appropriately replaced or combined with components of other embodiments, etc. Also, some components or functions of the embodiments and modifications described above may be omitted. 【0151】 Regarding the method of fixing each component, instead of screws and holes, fixing parts using other connecting means may be used. Alternatively, the components may be fixed to each other by providing fixing parts that are configured to engage with each other. [Industrial applicability] 【0152】 As described above, the prefabricated furniture structure according to the present invention has the effect of being able to construct prefabricated furniture with high strength by combining a relatively small number of types of parts, and is useful as a prefabricated furniture structure, etc. [Explanation of symbols] 【0153】 1. Assembly furniture structure 8. Assembly screws for the components 9. Joint connecting screws 10 posts 11 Post fixing part 12 First hole 15 Second hole 20 bar 21 Bar fixing part 22 bar fixing holes 23 Notch 25 Third hole 27 Fourth hole 30 joints 31 Mounting part 34 Slit section 35 Joint hole 40 Structural plate 41 First opposite side 42. Second opposite side 43 First bending part 44 Second bend 45. Missing part 47 Plate fixing part 48 Plate fixing hole 50 Angle members 51 Vertical section 52 Horizontal section 55 Support member 56 Hole 60 Top component 66 mounting holes 101, 102, 103, 104, 105, 106, 107, 108 Assembled furniture (Example of assembled furniture structure) D Reference position

Claims

[Claim 1] At least four posts used in a nearly vertical position, At least four bars used in a nearly horizontal position, It is formed in a roughly rectangular prism shape and has eight or more joints for assembling the post and the bar, The structure comprises at least one substantially rectangular structural plate having four bent portions that bend from each side along the bar or post, The post is provided with a plurality of post fixing portions, each having a first hole portion with a screw hole for fixing the joint, and a second hole portion with a screw hole provided near the first hole portion. The bar is provided with a bar fixing hole, which is a through hole located near the end, and a third hole portion having a screw hole for fixing the structural plate. The joint has a joint hole portion having a screw hole formed on at least one side, The joint can be fixed to the post fixing portion of the post by screw, The bar is positioned to cover the joint fixed to the post and can be fixed to the joint by a screw passing through the bar fixing hole. The assembled furniture structure is characterized in that the bent portion of the structural board has a board fixing portion formed therein, which is a through hole into which a screw can be inserted, so that when the structural board is placed as a shelf board, the three bent portions can each be screwed into the third hole, and when the structural board is placed as a back board, the three bent portions can each be screwed into the second hole and the third hole. [Claim 2] The system includes an angle member that can be fixed to the portion where the post and the bar are fixed, and which supports the bar with respect to the post. The joint holes are provided on three of the four sides of the joint. The bar fixing holes are formed on the side surface of the bar. The end of the bar is provided with a notch that exposes the lower surface of the joint. The assembly furniture structure according to claim 1, wherein the angle member is configured to be screwed into both the joint hole on the lower side of the joint and the second hole provided below the first hole in the post fixing portion. [Claim 3] The assembly furniture structure according to claim 2, wherein the portion of the angle member facing the lower surface of the joint is configured to be housed in the notch. [Claim 4] The structural plate has, as the bent portion, two first bent portions that bend from two first opposite sides, and two second bent portions that bend from two second opposite sides, Both of the first bent portions have a defect near the end closest to one of the two second opposite sides. Each of the two second bent portions has a defect near both ends. The assembly furniture structure according to claim 2, wherein when the structural board is arranged as a back panel, the portion near the joint hole and the second hole to which the angle member can be attached is exposed without being covered by the bent portion of the structural board. [Claim 5] The bar is provided with a fourth hole having a screw hole for attaching the joint. The assembly furniture structure according to claim 1, wherein the third hole is provided in the vicinity of the fourth hole. [Claim 6] When the post, the bar, the joint, and the structural plate are assembled with components that can be assembled together, the position where the central axis of the post or bar to which the joint is attached intersects with the central axis of the joint is called the reference position. The assembly furniture structure according to claim 1, wherein the distance between the reference position in the post and the second hole, the distance between the reference position in the bar and the third hole, and the distance between the reference position in the structural plate and the plate fixing hole are configured to be substantially the same as each other. [Claim 7] Between the four posts, there are four bars at the same height arranged such that the posts form a rectangle with each post as its vertex in a plan view. Of these, two bars that form opposite sides in a plan view have a length approximately twice that of a predetermined standard length. The assembly furniture structure according to claim 6, wherein the distance from each end of the bar to the reference position corresponding to each of the third holes is configured to correspond to the reference length. [Claim 8] In the post, two or more post fixing parts are arranged so as to be aligned vertically with respect to each other. The assembly furniture structure according to claim 7, wherein the distance between each of the first holes corresponds to the standard length. [Claim 9] The two first opposite sides of the structural plate have dimensions corresponding to the reference length, The assembly furniture structure according to claim 7, wherein the other two second opposite sides of the structural plate have dimensions corresponding to integer multiples of the reference length. [Claim 10] The assembly furniture structure according to claim 9, wherein the dimension of the second opposite side corresponds to a dimension obtained by multiplying the standard length by N and then multiplying the thickness dimension of the bar by a number obtained by subtracting 1 from N (where N is an integer of 2 or more). [Claim 11] The dimensions of the first and second opposite sides are slightly smaller than the length of the corresponding bars. The assembly furniture structure according to claim 9, wherein, in a state in which the structural board is fixed as a back panel or shelf board by screws, a plurality of bars or posts to which the structural board is fixed are configured to be attracted to one another by the fact that the structural board is fixed. [Claim 12] The assembly furniture structure according to claim 1, wherein the post and the bar are rectangular tubes and have the same outer diameter. [Claim 13] A support member that can be fixed together with the bar to the joint hole of the joint, The system includes a top member that can be attached to the support member, The assembly furniture structure according to claim 1, wherein the top member is configured to cover a portion of the upper surface of each of the adjacent bars in a plan view. [Claim 14] At least four posts used in a nearly vertical position, At least four bars used in a nearly horizontal position, It is formed in a roughly rectangular prism shape and has eight or more joints for assembling the post and the bar, The structure comprises at least one substantially rectangular structural plate having four bent portions that bend from each side along the bar or post, The post is provided with a plurality of post fixing parts, each having a first fixing part for fixing the joint and a second fixing part provided near the first fixing part. The bar is provided with a bar fixing portion located near its end and a third fixing portion for fixing the structural plate. The joint has a joint fixing portion formed on at least one side, The joint is configured to be fixable to the post fixing portion, The bar can be fixed to the joint by the bar fixing portion, with its end positioned to cover the joint fixed to the post. The assembled furniture structure is configured such that the bent portions of the structural board are such that when the structural board is placed as a shelf board, the three bent portions can each be fixed to the third fixing portion, and when the structural board is placed as a back panel, the three bent portions can each be fixed to the second fixing portion and the third fixing portion. [Claim 15] A post used in the assembly furniture described in claims 1 to 13, having a plurality of post fixing parts. [Claim 16] A bar used in the assembled furniture according to claims 1 to 13, having the bar fixing hole and the third hole portion. [Claim 17] A structural board used in the assembled furniture according to claims 1 to 13, having the four bent portions and the board fixing holes. [Claim 18] A top member used in the assembled furniture according to claims 1 to 13, which is configured to be attachable to a support member that can be fixed together with the bar to the joint hole of the joint.

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