Single fixtures and combination fixtures

Abstract

To solve such a problem of impairing design that a joining part is located in a pattern of a side surface part in a polygonal cylindrical body (display rack) for improving an appearance of products or the like.SOLUTION: In a store fixture unit 1 in the invention, a polygonal flat bottom part 2 and side surface parts 3 of the number that corresponds to the number of end edges 6 of the flat bottom part 2 are continuously arranged through the respective end edges 6. Each of the side surface parts 3 has a first surface 4 and a second surface 5 of a triangular shape, and the first surface 4 and the second surface 5 are continuously arranged through an oblique side 7. By folding along the respective end edges 6 of the flat bottom part 2 and the respective side surface parts 3 and the oblique sides 7 of the respective surfaces 4, 5, a cylindrical outer shape of an antiprism is formed. A part facing the flat bottom part 2 is an opening bottom part 8. A joining part 9 of the second surface 5 of one of the adjacent side surface parts 3 and the first surface 4 of the other side surface part 3 is constituted to be the oblique side 7 of the respective surfaces 4, 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a single piece of furniture and a combination of furniture. [Background technology]

[0002] Conventionally, display stands have been used in various stores to improve the appearance of merchandise and the like. An example of this type of display stand is that shown in Patent Document 1. The display stand in Patent Document 1 is formed into a polygonal cylinder by folding cardboard. A plurality of triangular patterns are formed on the side of the polygonal cylinder (display stand) by folding. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-157842 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration of Patent Document 1, the joints at both ends of the paperboard are located within the plane of some of the triangles on the side of the polygonal cylinder, which results in a pattern in which some of the triangles appear to be separated, impairing the design (looking unattractive) (see Figure 3 of Patent Document 1). [Means for solving the problem]

[0005] The technical object of the present invention is to provide a single piece of fixture and a combination of fixtures that have been improved by considering the current situation as described above.

[0006] The present invention includes various configurations specified in each claim. Of these, the invention of claim 1 relates to a fixture unit. The fixture unit has a polygonal flat bottom and a number of side sections corresponding to the end edges of the flat bottom, connected via the end edges. Each side section has a triangular first and second surface, and the first and second surfaces are connected via a hypotenuse. The flat bottom and each side section are folded along the end edges and the hypotenuses of each surface, forming an inverted prismatic cylindrical shape. The portion facing the flat bottom is an open bottom, and the joint between the second surface of one adjacent side section and the first surface of the other adjacent side section forms the hypotenuse of each surface.

[0007] The present invention includes a combination fixture in which the fixture units are stacked vertically in multiple tiers. The invention of claim 2 relates to a combination fixture. In the combination fixture of this invention, when the fixture units are stacked vertically in two tiers, the opening bottoms of the two fixture units overlap, and the joints between the opening bottoms form the edge of each unit.

[0008] In the combined fixture of the present invention, a plug joint may be attached to the overlapping opening bottoms.

[0009] In the combined fixture of the invention of claim 4, when the fixture units are stacked in three or more layers, the open bottoms of the fixture units arranged vertically overlap, or the flat bottoms overlap, and the joints between the open bottoms, the flat bottoms and the open bottoms, or the flat bottoms overlap, form the end edges of each.

[0010] In the combined fixture of the present invention, the flat bottom portion of the fixture unit located other than the topmost tier or other than the topmost and bottommost tiers may be formed with an insertion hole into which an insertion joint is fitted.

[0011] In the combination fixture of the present invention, the insertion hole may be set to the same size as the opening of the opening bottom.

[0012] The inventions from claim 7 onwards relate to a single piece of furniture. In the single piece of furniture according to the present invention, the flat bottom portion and the group of side portions may be formed from a single sheet.

[0013] The fixture unit according to the present invention may have an outer shape that is cylindrical and has an inverse rectangular prism, an inverse triangular shape, an inverse pentagonal shape, or an inverse hexagonal shape.

[0014] In the fixture unit of the present invention, the hypotenuses of the first and second surfaces of each side surface may be set to the same length. In this case, the first and second surfaces of each side surface may be an isosceles triangle or an equilateral triangle. One of the first and second surfaces of each side surface may be an equilateral triangle, and the other may be an isosceles triangle.

[0015] In the fixture itself according to the present invention, the end edges of the flat bottom portion and the end edges of the open bottom portion may be set to the same length, or may be set to different lengths.

[0016] Furthermore, in the fixture itself according to the present invention, a reinforcing core member is arranged inside, separated into two parts, one above the other, and the longitudinal end of the core member closer to the flat bottom portion may be inclined so that it can abut against and support the inner surface of the first surface it faces. [Effects of the Invention]

[0017] The fixture itself according to the present invention is folded along the edges and oblique sides of the flat bottom and side sections to form an inverted prismatic cylindrical shape. The joints between the second surface of one adjacent side section and the first surface of the other side section are located at the oblique sides of each surface, so there are no joints within the triangular surfaces of each side section. In other words, the interiors of each triangular surface are not divided. This creates a sense of unity between the flat bottom and side sections, improving the overall appearance of the fixture, and enhancing its aesthetic appeal (design).

[0018] Furthermore, with the combination fixture of the present invention, when the fixture units are stacked one on top of the other in multiple layers, the open bottoms of the fixture units lined up one above the other, or the flat bottoms and the open bottoms, or the flat bottoms, are overlapped, and the joints between the open bottoms, the flat bottoms and the open bottoms, or the flat bottoms are located at the respective edge edges. This makes the joints between the fixture units lined up one above the other less noticeable, creating a sense of unity between the multiple fixture units lined up one above the other, which also improves the appearance (design) in this case.

[0019] In the combination fixture of the present invention, if plug joints are attached to the bottoms of the overlapping openings, the plug joints can prevent lateral shifting between the individual fixtures lined up above and below, stabilizing the connection of the combination fixture.

[0020] In the combination fixture of the present invention, by forming an insertion hole into which an insertion joint can be fitted in the flat bottom of a single fixture located other than the topmost tier or other than the topmost and bottommost tiers, it is possible to easily create a combination fixture stacked in three or more tiers.

[0021] In the combination fixture of the present invention, if the insertion hole is set to the same size as the opening at the bottom of the opening, it becomes possible to standardize the insertion joint, thereby reducing the number of parts and reducing costs.

[0022] In the fixture unit of the present invention, a reinforcing core member is placed inside, divided into two parts, one above the other, and the longitudinal end of the core member closer to the flat bottom is inclined so that it can abut against the inner surface of the first surface it faces and provide support.This not only reinforces the inverted, cylindrical fixture unit, but also allows the bending angle of the first surface to be regulated when assembling the fixture unit, making assembly easier. [Brief explanation of the drawings]

[0023] [Figure 1] This is an oblique view of the exterior of a two-tiered combination fixture, where (a) is a view from the front and above, and (b) is a view from above at a position 45 degrees shifted from the front to the side. [Figure 2] 1A and 1B are front views of the exterior of a single piece of fixture in the first embodiment, where (a) is a view from the front and above, and (b) is a view from above at a position 45 degrees shifted from the front to the side. [Figure 3] These are external views of a single piece of fixture, with (a) being a front view, (b) being a plan view, (c) being a bottom view, (d) being a left side view, (e) being a right side view, (f) being a rear view, and (g) being a view from a position shifted 45 degrees to the side from the front. [Figure 4] This is an exploded view of a single piece of fixture. [Figure 5] FIG. 2 is an exploded perspective view of a first core member. [Figure 6] FIG. 2 is an external perspective view of a first core member. [Figure 7] FIG. 2 is an exploded plan view of a second core member. [Figure 8] FIG. 2 is an external perspective view of a second core member. [Figure 9] This is a plan view of a first core member placed on a single fixture sheet in an unfolded state. [Figure 10] FIG. 10 is a plan view showing a state in which the first surface of a part of the side surface portion is folded inward. [Figure 11] This is a plan view in which the first surfaces of all side surface portions are folded inward to join the second surface of one adjacent side surface portion to the first surface of the other adjacent side surface portion. [Figure 12] FIG. 12 is a front cross-sectional view taken along the line XII-XII in FIG. 11. [Figure 13] FIG. 10 is a plan view showing a second core member disposed on a first core member within the open bottom portion. [Figure 14] This is a plan view of the completed assembly of a single piece of fixture, with the notches on each inward edge inserted into the engagement grooves of the second core member. [Figure 15] FIG. 10 is a plan view showing the packaging state of the fixture sheet. [Figure 16] FIG. 10 is an exploded perspective view of a plug-in coupling according to a second embodiment. [Figure 17] FIG. [Figure 18] This is an exploded perspective view of a two-tiered combination fixture. [Figure 19]This is a separated perspective view showing the connection relationship between the lower fixture unit equipped with a plug-in joint and the upper fixture unit, where (a) is a view from diagonally above and (b) is a view from diagonally below. [Figure 20] FIG. 11 is an external perspective view of a three-tiered combination fixture in the third embodiment. [Figure 21] This is an exploded view of a single piece of fixture with insertion holes. [Figure 22] These are perspective views of the exterior of a single piece of fixture with an insertion hole, where (a) is a view from diagonally above and (b) is a view from diagonally below. [Figure 23] This is an exploded perspective view of a three-tiered combination display unit. [Figure 24] FIG. 10 is an external perspective view of a four-tier combination fixture in the fourth embodiment. [Figure 25] FIG. 11 is an external perspective view of a five-tier combination fixture in the fifth embodiment. [Figure 26] FIG. 13 is an external perspective view of a combination fixture having an inverted triangular prism shape in the sixth embodiment. [Figure 27] This is an exploded view of a single piece of fixture. [Figure 28] FIG. 13 is an external perspective view of a combination fixture having an inverted pentagonal prism shape in the seventh embodiment. [Figure 29] This is an exploded view of a single piece of fixture. [Figure 30] FIG. 13 is an external perspective view of a combination fixture having an inverted hexagonal columnar outer shape in the eighth embodiment. [Figure 31] This is an exploded view of a single piece of fixture. [Figure 32] FIG. 13 is an exploded view of a single fixture in the ninth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] Next, specific embodiments of the present invention will be described with reference to the drawings. First, a fixture unit 1 will be described as a first embodiment with reference to Figs.

[0025] As shown in Figures 2 to 4, the fixture unit 1 of the first embodiment has a rectangular flat bottom 2 and four side sections 3, the number of which corresponds to the end edges 6 of the flat bottom 2, connected together via the end edges 6. The fixture unit 1 (flat bottom 2 and four side sections 3) is obtained by punching out the necessary portions from a single sheet in the unfolded state shown in Figure 4. By performing a bending process from this unfolded state, a cylindrical fixture unit 1 with an inverted prismatic (or twisted prismatic) outer shape is formed. The fixture unit 1 (single sheet) is made of, for example, thin cardboard or thick paper. The fixture unit 1 may also be made of plywood, plastic, or other materials. The fixture unit 1 may also be made of multiple sheets.

[0026] Each side surface 3 of the fixture unit 1 has a triangular first surface 4 and a second surface 5. The first surface 4 and the second surface 5 are connected via a hypotenuse 7. The portion of the fixture unit 1 facing the flat bottom portion 2 forms an open bottom portion 8 (see Figures 3(b) and (c)). Figure 3(c) omits the illustration of core members 20 and 26, which will be described later.

[0027] As mentioned above, in the first embodiment, the fixture unit 1 has an outer shape that is an inverted prism. An inverted prism is a polyhedron formed by twisting a polygonal prism and replacing the squares on the side surfaces with triangles. In this case, the fixture unit 1 has an outer shape that is an inverted prism, and has a flat bottom portion 2 and an open bottom portion 8 that correspond to two bottom surfaces. The fixture unit 1 has twice the number of triangular faces 4 and 5 on the side portion 3 as a whole, the number of which is twice the number (four) of the end sides 6 of the flat bottom portion 2 or the open bottom 8. In other words, the fixture unit 1 of the first embodiment has a total of eight triangular faces 4 and 5.

[0028] In the first embodiment, the flat bottom 2 is square, and the first and second faces 4 and 5 of each side face 3 are equilateral triangles. It is sufficient that the first and second faces 4 and 5 are at least isosceles triangles. The end side 6 of the flat bottom 2 (which is also the base 6 of the first face 4) and the three sides 6 and 7 of each face 4 and 5 are the same length.

[0029] An overlapping portion 10 is connected to the first surface 4 at a location opposite the second surface 5 via a hypotenuse 7. An overlapping portion 11 is connected to the second surface 5 at a location opposite the first surface 4 via a hypotenuse 7. An engagement groove 12 is formed in each overlapping portion 10, 11 at a location far from the flat bottom portion 2, into which an engagement piece 32, described below, is fitted. A bottom edge portion 13 is connected to each second surface 5 via a bottom side 6 (which is also the end side 6 of the opening bottom 8). An inwardly folded edge portion 15 is connected to each bottom edge portion 13 via a folding side 14. A notch 16 is formed in each inwardly folded edge portion 15 to fit into an engagement groove 31 of a second core member 26, described below.

[0030] As shown in Figures 15 and 16, reinforcing core members 20, 26 are arranged inside the fixture unit 1 in two separate sections, one above the other (along the opening direction). As shown in Figures 5 and 6, the first core member 20 located closer to the flat bottom 2 is made up of two sets of partition plates 21, 22, each consisting of multiple plates, which are fitted together and connected in a lattice shape (which can also be described as a grid shape or a cross shape) in a plan view. In the first embodiment, each of the partition plates 21, 22 consists of two plates. It goes without saying that the number and size of the partition plates 21, 22 in each set may be changed as appropriate depending on the size of the fixture unit 1, etc.

[0031] Each set of partition plates 21, 22 is formed in a horizontally elongated, approximately rectangular shape. One set of partition plates 21 has upward-opening mating grooves 23 formed in the same number (two in the first embodiment) as the other set of partition plates 22. The other set of partition plates 22 has downward-opening mating grooves 24 formed in the same number (two in the first embodiment) as the one set of partition plates 21. The first core member 20 is assembled by connecting a total of four partition plates 21, 22 in a lattice shape in a plan view so that the mating grooves 23 of one set fit together with the mating grooves 24 of the other set (see FIGS. 5 and 6).

[0032] As shown in Figures 5, 6, 11, and 12, in the first core member 20 located closer to the flat bottom portion 2, the longitudinal ends of each partition plate 21, 22 form an inclined edge 25 that is inclined so that they can abut against and support the inner surface of the first surface 4 that they face during assembly. In other words, when housed within the fixture unit 1, each partition plate 21, 22 is formed into an inverted trapezoid shape in which the side facing the open bottom 8 is longer than the side facing the flat bottom portion 2. Therefore, each inclined edge 25 is inclined so that it protrudes outward as it moves from the flat bottom portion 2 side toward the open bottom 8 side. With this configuration, the presence of each inclined edge 25 can regulate the bending angle (rise angle) of each first surface 4 during assembly of the fixture unit 1, resulting in the advantage of excellent assembly workability.

[0033] As shown in Figures 7, 8, 13, and 14, the second core member 26, located near the opening bottom 8 (above the first core member 20), has substantially the same basic structure as the first core member 20, and is made up of two sets of partition plates 27, 28, each consisting of multiple plates, which are fitted together and connected in a lattice shape (which can also be described as a grid shape or a cross shape) in a plan view. In the first embodiment, each of the partition plates 27, 28 consists of two plates. The number and size of the partition plates 27, 28 in each set can be changed as appropriate depending on the size of the fixture unit 1, etc.

[0034] Each set of partition plates 27, 28 is formed in a horizontally elongated, approximately rectangular shape. One set of partition plates 27 has upward-opening mating grooves 29 formed in the same number (two in the first embodiment) as the other set of partition plates 28. The other set of partition plates 28 has downward-opening mating grooves 30 formed in the same number (two in the first embodiment) as the one set of partition plates 27. The second center core member 26 is assembled by connecting a total of four partition plates 27, 28 in a lattice shape in a plan view so that the mating grooves 29 of one set fit into the mating grooves 30 of the other set (see FIGS. 7 and 8).

[0035] As shown in Figures 7, 8, 13, and 14, in the second core member 26 located closer to the opening bottom 8, the edges of each partition plate 27, 28 on the opening bottom 8 side are formed with engagement grooves 31 into which the notches 16 of the inwardly folded edge portion 15 continuing to each second surface 5 fit (two per partition plate 27, 28 in the first embodiment). Note that the partition plates 21, 22, 27, 28 of the first and second core members 20, 26 are made of, for example, thin cardboard or thick paper. The partition plates 21, 22, 27, 28 may also be made of plywood, plastic, or other materials.

[0036] Next, the assembly procedure for the fixture unit 1 will be described with reference to Figures 9 to 14. First, as shown in Figure 9, the first core member 20 is placed on the flat bottom portion 2 of the sheet of the fixture unit 1 in an unfolded state. In this case, the first core member 20 is arranged in a cross shape in plan view so that the inclined sides 25 of each partition plate 21, 22 face the corresponding first surface 4, and so that the horizontal end side 6 and one set of partition plates 21 are aligned parallel to each other in Figure 9, and the vertical end side 6 and the other set of partition plates 22 are aligned parallel to each other.

[0037] Next, as shown in Figures 10 and 11, the first surface 4 of each side surface portion 3 is bent inward in the rising direction along each end edge 6 of the flat bottom portion 2, while the second surface 5 of each side surface portion 3 is bent relative to the first surface 4 along the oblique side 7 between the first surface 4 and the second surface 5. In this case, the first surface 4 of each side surface portion 3 abuts against the corresponding oblique side 25 of each of the partition plates 21, 22 of the first core member 20, thereby restricting the bending angle (rising angle) of each first surface 4. As a result, the bending posture of each first surface 4 is regulated (see Figures 10 to 12).

[0038] Then, the corresponding overlap portions 10, 11 of the second surface 5 of one adjacent side surface portion 3 and the first surface 4 of the other adjacent side surface portion 3 are folded inward to overlap each other, and the engagement pieces 32 are fitted into the engagement grooves 12 that are aligned by overlapping the overlap portions 10, 11, thereby joining the second surface 5 of one adjacent side surface portion 3 and the first surface 4 of the other adjacent side surface portion 3. Therefore, the joint portion 9 between the second surface 5 of one adjacent side surface portion 3 and the first surface 4 of the other adjacent side surface portion 3 becomes the hypotenuse 7 of the first surface 4 or the second surface described above and appears on the outside.

[0039] As shown in FIG. 13 , when the second surface 5 of one adjacent side surface portion 3 and the first surface 4 of the other adjacent side surface portion 3 are all joined together, a square-frame-shaped open bottom portion 8, formed by rotating the flat bottom portion 2 by 45 degrees, is formed above the flat bottom portion 2 and the first core member 20. Next, the second core member 26 is placed on the first core member 20 within the open bottom portion 8. In this case, the second core member 26 is inserted into the open bottom portion 8 with each engagement groove 31 facing toward the open bottom portion 8. Because the open bottom portion 8 is a square-frame-shaped open bottom portion 8 formed by rotating the flat bottom portion 2 by 45 degrees, the second core member 26 is housed within the open bottom portion 8 in an X-shaped position in plan view relative to the first core member 20, which is cross-shaped in plan view.

[0040] 13 and 14, each bottom edge 13 is folded inward along the bottom side 6 of each second surface 5 (edge ​​side 6 of opening bottom 8), and the corresponding inward edge 15 is folded toward the inside of opening bottom 8 via each folded side 14, and the notches 16 of each inward edge 15 are inserted into and fixed to the engaging grooves 31 of the second core member 26. This completes the assembly of the fixture unit 1 shown in Figures 2(a) and 2(b), i.e., the fixture unit 1 having an inverted rectangular prism-like outer shape and a cylindrical shape.

[0041] With the above configuration, there are no joints 9 within the triangular faces 4, 5 of each side face 3. In other words, the interior of each triangular face 4, 5 is not divided. This allows the overall appearance of the fixture unit 1, i.e., the flat bottom 2 and each side face 3, to have a sense of unity, improving the appearance (design).

[0042] Furthermore, since the reinforcing core members 20, 26 are arranged inside the fixture unit 1 in two parts, one above the other, the fixture unit 1, which is cylindrical and has an inverted rectangular column shape, can be reinforced without exposing the core members 20, 26 and reducing the design.

[0043] The fixture unit 1 of the first embodiment can be used, for example, as various stands, tables, chairs, or objects for exhibitions. In this case, the fixture unit 1 is placed, for example, on the top of a table or on the floor, with the open bottom 8 facing downward. The flat bottom 2 and the outer surfaces of each side surface 3 of the fixture unit 1 can be decorated with printing or the like, which also effectively improves the design.

[0044] Furthermore, in the first embodiment, the second surface 5 of one adjacent side surface portion 3 and the first surface 4 of the other adjacent side surface portion 3 are joined together by fitting the engaging pieces 32 into both overlapping portions 10, 11, but both overlapping portions 10, 11 may also be bonded with adhesive, tape, etc. However, if the configuration of the first embodiment is adopted, the fixture unit 1 can be repeatedly assembled and disassembled, which makes it extremely easy to work with, for example, when reusing or disposing of the fixtures separately.

[0045] When packaging the sheet of the fixture unit 1, the bottom edge and the inward folded edge are folded along the bottom edge 6 of the second surface 5 of each side portion 3 (the edge 6 of the opening bottom 8) so that they overlap the corresponding second surface (see Figure 15). The sheet of the fixture unit 1 in this state is packaged in, for example, a packaging body 33 in a generally rectangular shape when viewed from above. The use of the configuration of the first embodiment has the advantage of making the package thin and compact.

[0046] Next, a combination fixture 50 of a second embodiment will be described with reference to Figure 1 and Figures 16 to 19. The combination fixture 50 of the second embodiment is formed by stacking the fixture units 1 shown in the first embodiment in two tiers, one above the other. In the second embodiment, when the fixture units 1 are stacked in two tiers, the open bottoms 8 of the two fixture units 1 overlap each other. Therefore, the joints 9 between the open bottoms 8 form the respective end edges 6 (see Figures 1(a) and 1(b)). In the second embodiment, the four bottom edge portions 13 of the two fixture units 1 function as overlapping portions, and the two fixture units 1 are stacked in two tiers, one above the other.

[0047] With the above configuration, not only is the interior of each triangular face 4, 5 of each fixture unit 1 not divided, but the joints 9 between fixture units 1 lined up above and below are also made less noticeable, creating a sense of unity between the flat bottom portion 2 and each side portion 3, as well as between multiple fixture units 1 lined up above and below, thereby improving the appearance (design) in this case as well.

[0048] As shown in Figures 16 to 19, in the combined fixture 50 of the second embodiment, a plug joint 40 is attached to the overlapping opening bottoms 8. The plug joint 40 includes a substantially rectangular closure plate 41 that fits into the opening 18 of each opening bottom 8 so that it cannot slide laterally, and four vertically elongated insertion pieces 42 attached to the four periphery of the closure plate 41. The plug joint 40 is assembled by fitting notches 44 formed in the upper and lower midpoints of each insertion piece 42 into notches 43 formed on the outer periphery of the closure plate 41. The other configurations are the same as those of the first embodiment. The plug joint 40 can be made of, for example, thin cardboard or thick paper, but it is also possible to use plywood, plastic, or the like as its material.

[0049] The planar area of ​​the closure plate 41 is set to be approximately the same as or slightly smaller than the opening 18 so that the closure plate 41 fits snugly into the opening 18 of the opening bottom 8. The closure plate 41 has a thickness 45 that allows it to straddle the vertically connected openings 8 when attached to the overlapping opening bottoms 8. For this reason, when the fixture units 1 are stacked in two tiers, even if there is only the closure plate 41, it will be sandwiched between the upper and lower second core members 26 and will straddle the vertically connected openings 8, making it possible to prevent the fixture units 1 lined up in two tiers from shifting sideways.

[0050] Furthermore, because each insert piece 42 fits into the lattice of the corresponding upper or lower second core member 26, the plug joints 40 can prevent lateral displacement between the fixture units 1 lined up above and below, stabilizing the connection of the combined fixture 50. Regardless of whether or not plug joints 40 are used, the bottom edges 13 of both fixture units 1 (where there is an overlap) may be bonded together with adhesive or tape, but adopting the configuration of the second embodiment is preferable because, like the first embodiment, the fixture units 1 can be repeatedly assembled and disassembled.

[0051] Next, a combination fixture 51 of a third embodiment will be described with reference to Figures 20 to 23. The combination fixture 51 of the third embodiment is formed by stacking the fixture units 1 shown in the first embodiment in three tiers, one above the other. In the third embodiment, when the fixture units 1 are stacked in three tiers, the open bottoms 8 of the fixture units 1 arranged vertically overlap each other, or the flat bottoms 2 and 8, or the flat bottoms 2 overlap each other. Therefore, the joints 9 between the open bottoms 8, the flat bottoms 2 and 8, or the flat bottoms 2 overlap each other, forming the respective end edges 6 (see Figure 20).

[0052] In the third embodiment, the flat bottom portions 2 of the fixture units 1 positioned other than the topmost row or other than the topmost and bottommost rows are formed with insertion holes 19 into which the insertion fittings 40 shown in the second embodiment are fitted. When the flat bottom portions 2 and open bottom portions 8 of fixture units 1 lined up one above the other or when the flat bottom portions 2 overlap with each other, the insertion holes 19 in each flat bottom portion 2 perform the same function as the openings 18 in the open bottom portion 8 shown in the second embodiment. Furthermore, since the first core member 20 emerges from the insertion holes 19 in the flat bottom portions 2, when the insertion fittings 40 are inserted into the insertion holes 19 in each flat bottom portion 2, each insertion piece 42 fits into the lattice of the first core member 20.

[0053] According to the above configuration, by forming insertion holes 19 in the flat bottom portion 2 of fixture units 1 located other than the topmost tier or other than the topmost and bottommost tiers, it is possible to easily realize a combination fixture 51 stacked in three tiers. Furthermore, even in three tiers, the insertion joints 40 can prevent lateral shifting between the fixture units 1 lined up above and below, stabilizing the connection of the combination fixture 51. In the third embodiment, the four bottom edges 13 of the open bottom 8 and the peripheral edges surrounding the insertion holes 19 in the flat bottom portion 2 function as overlapping portions.

[0054] In addition, the lowest unit fixture 1 may or may not have an insertion hole 19 in the flat bottom 2. For example, if the open bottom 8 is located on the floor or the top plate, an insertion hole 19 is required in the flat bottom, but if the flat bottom 2 is located on the floor or the top plate, an insertion joint 40 is not attached, so it does not matter whether the insertion hole 19 is present or not.

[0055] In the third embodiment, the insertion hole 19 in the flat bottom portion 2 is set to the same size as the opening 18 in the open bottom portion 8. Therefore, the insertion joint 40 shown in the second embodiment can be used as is. In other words, when the fixture units 1 are stacked in multiple layers, the insertion joint 40 can be shared, reducing the number of parts and costs. The insertion hole 19 is set to a shape similar to that of the flat bottom portion 2. In the third embodiment, since the outer shape of each fixture unit 1 is an inverse rectangular pillar, the shape of the insertion hole 19 is also a rectangle, the same as that of the flat bottom portion 2. It goes without saying that the opening 18 in the open bottom portion 8 is also a shape similar to that of the flat bottom portion 2.

[0056] Figure 24 shows a fourth embodiment of a four-tier combination fixture 52 in which the fixture units 1 of the first embodiment are stacked vertically in four tiers, and Figure 25 shows a fifth embodiment of a five-tier combination fixture 53 in which the fixture units 1 of the first embodiment are stacked vertically in five tiers. The fourth and fifth embodiments also employ the insertion holes 19 and insertion joints 40 shown in the third embodiment, making it easy to realize combination fixtures 52, 53 that are stacked vertically in multiple tiers.

[0057] While each of the fixture units 1 shown in the first to fifth embodiments has an inverted rectangular prism-shaped exterior, it is also possible to use other inverted rectangular prism-shaped exteriors, such as an inverted triangular prism, an inverted pentagonal prism, or an inverted hexagonal prism. Figures 26 and 27 show a two-tiered combination fixture 54 as a sixth embodiment, which uses cylindrical fixture units 1 with an inverted triangular prism-shaped exterior. In the sixth embodiment, the flat bottom 2, the open bottom 8, and the first and second surfaces 4 and 5 of each side surface 3 are all equilateral triangles. The fixture unit 1 of the sixth embodiment has a total of six triangular surfaces 4 and 5.

[0058] The rest of the configuration is the same as in the first to fifth embodiments, and by forming an insertion hole 19 in the flat bottom portion 2, it is possible to stack three or more layers one on top of the other. In this case, the insertion hole 19 should be set to a shape similar to that of the flat bottom portion 2. That is, it should be an equilateral triangle as shown by the imaginary line in FIG. 27. In the sixth and subsequent embodiments, illustrations of the core members 20, 26 and the insertion joint 40 are omitted, but it is sufficient to basically follow the structural concepts of the first to fifth embodiments.

[0059] Figures 28 and 29 show a seventh embodiment of a two-tiered combination fixture 55 that uses cylindrical fixture units 1 with an inverted pentagonal prism-like external shape. In the seventh embodiment, the flat bottom 2 and open bottom 8 are regular pentagons, and the first surface 4 and second surface 5 of each side surface 3 are isosceles triangles. The fixture unit 1 of the seventh embodiment has a total of 10 triangular surfaces 4, 5.

[0060] Other configurations are the same as those of the first to fifth embodiments, and by forming insertion holes 19 in the flat bottom portion 2, it is possible to stack them in three or more layers. The insertion holes 19 are preferably in the shape of a regular pentagon (similar to the shape of the flat bottom portion 2) as shown by the imaginary lines in Figure 29.

[0061] Figures 30 and 31 show an eighth embodiment of a two-tiered combination fixture 56 that uses cylindrical fixture units 1 with an inverted hexagonal prism-like outer shape. In the eighth embodiment, the flat bottom 2 and open bottom 8 are regular hexagons, and the first surface 4 and second surface 5 of each side surface 3 are isosceles triangles. The fixture unit 1 of the eighth embodiment has a total of 12 triangular surfaces 4, 5.

[0062] Other configurations are the same as those of the first to fifth embodiments, and it is possible to stack three or more layers vertically by forming insertion holes 19 in the flat bottom portion 2. The insertion holes 19 may be in the shape of a regular hexagon (similar to the shape of the flat bottom portion 2) as shown by the imaginary lines in Figure 29.

[0063] Figure 32 shows the unfolded state of a cylindrical fixture unit 1 with an inverted rectangular prism-like outer shape as a ninth embodiment. In the ninth embodiment, the flat bottom 2 and the open bottom 8 are square, the first face 4 of each side face 3 is an equilateral triangle, and the second face 5 is an isosceles triangle. If the lengths of the hypotenuses 7 on the first face 4 and the second face 5 are the same, a cylindrical fixture unit 1 with an inverted rectangular prism-like outer shape can be constructed. In this case, the fixture unit 1 narrows toward the open bottom 8. If the lengths of the end edge 6 of the flat bottom 2 and the end edge 6 of the open bottom 8 are the same, the fixture unit 1 shown in the first to eighth embodiments can be constructed. If the lengths of the end edge 6 of the flat bottom 2 and the end edge 6 of the open bottom 8 are different, the fixture unit 1 shown in the ninth embodiment, for example, can be constructed. The rest of the configuration is the same as in the first to fifth embodiments. By forming an insertion hole 19 in the flat bottom 2, for example, it is possible to stack the fixture units three or more times.

[0064] The configuration of each part of the present invention is not limited to the illustrated embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, the core members 20, 26 and the plug-in joint 40 are not essential components of the present invention, and structures other than those in the above-described embodiment may be adopted. The fixtures and combination fixtures of the present invention can be used, for example, as various stands, tables, chairs, or objects for exhibitions. [Explanation of symbols]

[0065] 1. Fixtures 2 flat bottom 3 Side part 4 Front page 5 Side 2 6 Edge 7 Hypotenuse 8 Opening bottom 9 Joint 18 Aperture 19 Insertion hole 20 First core member 26 Second core member 32 Engagement piece 40 Socket joint 50~56 Combination fixtures

Claims

1. The flat bottom and the side portions, the number of which corresponds to the end sides of the flat bottom, are formed from a single sheet connected via the end sides, and each of the side portions has a triangular first surface and a triangular second surface, and the first surface and the second surface are connected via a first oblique side. The flat bottom and the side portions are folded along the end sides and the first oblique sides of each of the side portions, so that the outer shape is formed into an inverted prismatic cylindrical shape. The portion facing the flat bottom is an open bottom, and the joint between the second surface of one adjacent side portion and the first surface of the other adjacent side portion forms the second oblique side of the first surface and the second surface. Fixtures only.

2. each side surface portion includes a first overlapping portion connected to a location of the first surface opposite to the second surface via the second oblique side, the first overlapping portion being for connecting the second surface of one of the adjacent side surface portions to the first surface of the other side surface portion at the joint portion; and a second overlapping portion connected to a location of the second surface opposite to the first surface via the second oblique side, The first overlapping portion and the second overlapping portion are bent inward and overlapped with each other, and are joined together by an engaging piece. The fixture unit according to claim 1.

3. When the fixture units described in claim 1 or 2 are stacked in two or more layers, the open bottoms of the fixture units arranged vertically overlap each other, the flat bottoms and the open bottoms, or the flat bottoms of the fixture units arranged vertically, and the joints between the open bottoms, the flat bottoms and the open bottoms, or the flat bottoms of the fixture units are the respective edge edges. Combination fixtures.

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