Wooden assembly furniture

Abstract

This invention provides wooden prefabricated furniture that employs a conventional wooden frame structure and maintains excellent fixing strength and appearance characteristics even when frequently assembled and disassembled, thereby enhancing structural and aesthetic stability. [Solution] Each of the multiple structural members has one or more connecting parts having a concave or concave shape that allows for connection and positioning by fitting with other structural members. Furthermore, a tension member 4 is provided detachably on at least some of the multiple structural members and is positioned near the connecting part or positioned to penetrate the inside of the connecting part, thereby maintaining the fitted state at the connecting part. A tension applying mechanism 5 is provided that applies a predetermined tension to the tension member 4 and has an adjustment means 51 for maintaining or adjusting the tension.

Description

Technical Field

[0001] The present invention relates to wooden assembled furniture that can be easily assembled and disassembled repeatedly without the need for fastening work using tools and can be recycled.

Background Art

[0002] Conventionally, assembled furniture can be assembled and disassembled as needed, for example, when moving for relocation or when not in use. From the viewpoints of having a compact storage form, excellent transportability, and being easy to secure storage space, it has been widely popular in recent years (see, for example, Patent Documents 1 and 2).

[0003] Also, as wooden products (wooden structures) using traditional construction methods, wooden assembled furniture such as tables, beds, shelves, chairs, etc., which can be assembled and disassembled by fitting solid wood materials together with joints or openings, etc., is known. Such wooden assembled furniture has the characteristics of being very excellent in assembly accuracy and designability at the initial assembly stage.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, some wooden prefabricated furniture employs a structure known as semi-rigid joints, where the assembled state is stabilized by the moment resistance generated at the interlocking parts during use. When such a semi-rigid joint structure is used, the stress generated at the interlocking parts that hold the members together tends to be large during use. For this reason, prefabricated furniture made using traditional construction methods is prone to wear and tear and dimensional changes due to the effects of repeated assembly and disassembly, as well as the effects of long-term use.

[0006] Furthermore, in recent years, in wooden assembly furniture, in addition to solid wood, particleboard, MDF (Medium Density Fiberboard), etc. are used, as well as screws, threaded inserts, and adhesives, and methods are employed to increase fastening strength using common methods. In this specification, increasing the fastening strength in wooden products using fasteners made of other materials as described above is referred to as "adhesion" between the fastener and the wooden material.

[0007] On the other hand, while the method using adhesion as described above offers excellent assembly accuracy during initial assembly, it is similar to the above method in that it uses the semi-rigid joint structure of traditional construction. As a result, repeated attachment and detachment, as well as long-term use, can easily lead to wear and dimensional changes. Furthermore, once fasteners made of other materials such as screws or adhesives are attached to the wood, permanent deformation occurs. This makes assembly and disassembly difficult due to repeated attachment and detachment, thus hindering long-term recycling.

[0008] Furthermore, when wooden assembly furniture like the one described above is used in a circular reuse system where it is frequently disassembled and reassembled due to movement between multiple locations such as offices and event venues, or due to changes in users, the following problems arise: First, wear on the mating surfaces can reduce the fixing force between the components. More specifically, for example, permanent deformation of the wood may occur due to adhesion between the wood material and the screw, which may lead to a decrease in the fixing force of the mating surfaces. Furthermore, if solid wood is used for each component, shrinkage due to drying and looseness due to aging may occur, raising concerns that the fixing strength of the interlocking parts will decrease, as mentioned above. Due to the various problems described above, it can be difficult to maintain structural stability when wooden prefabricated furniture made of wood is used over a long period of time. Furthermore, due to the various problems associated with using solid wood as described above, the usage rate of solid wood, which should have the greatest advantage from the perspective of cascading use of materials in wood-based structures, has been low.

[0009] This invention has been made in view of the above problems, and provides wooden assembly furniture that employs a wooden structure using conventional construction methods and can maintain excellent fixing strength and appearance characteristics even when assembled and disassembled frequently, thereby enhancing structural and aesthetic stability. [Means for solving the problem]

[0010] To solve the above problems, the inventors conducted extensive research. As a result, they first discovered that by providing tension members that are detachably attached to multiple structural members and positioned near each connecting part or penetrating the inside of the connecting part to maintain the fitted state at the connecting part, the accuracy of positioning and shape retention by the connecting part of the fitted structure can be further improved. Furthermore, they discovered that by providing a tension-applying mechanism that applies a predetermined tension to the tension member and has an adjustment means for maintaining or adjusting the tension, excellent rigidity and stability as a wooden structure can be obtained. In this way, by assigning roles to the connection and positioning of each member and fixing, they found that even when using a wooden structure made by conventional construction methods and repeatedly assembling and disassembling it at a high frequency, it is possible to maintain excellent fixing strength and appearance characteristics, thereby improving structural and aesthetic stability, and thus completed the present invention.

[0011] In other words, the present invention provides wooden assembly furniture made of a wooden structure in which a plurality of structural members are detachably attached to each other and can be repeatedly assembled and disassembled, wherein each of the plurality of structural members has one or more connecting parts having a concave or concave shape that allows for connection and positioning by fitting with other structural members, and further comprises a tensioning member that is detachably provided to at least a portion of the plurality of structural members and is arranged near the connecting part or is arranged to penetrate the inside of the connecting part to maintain the fitted state at the connecting part, and a tensioning mechanism that applies a predetermined tension to the tensioning member and has an adjustment means for maintaining or adjusting the tension.

[0012] The wooden assembly furniture of the present invention, in the above configuration, has a plurality of structural members that include at least a plate-shaped top plate member and a plurality of leg members, so that it can be repeatedly assembled and disassembled as a table-type wooden assembly furniture, the top plate member has a flat upper surface and one of the connecting parts on the lower surface which connects to the leg member side, the leg member has the other connecting part on one end which connects to the one connecting part and the other end which is the ground end, and the tensioning member is located near the one connecting part and the other connecting part The configuration is such that when tension is applied to the tensioning member by the tension-applying mechanism, the connected state is maintained by the fitting of one connecting part and the other connecting part, so that the top plate member and the plurality of leg members are assembled into the table-type wooden assembly furniture. When the tension on the tensioning member by the tension-applying mechanism decreases, the one connecting part and the other connecting part become separated, so that the table-type assembly furniture can be disassembled into the top plate member and the plurality of leg members.

[0013] The wooden assembly furniture of the present invention, in the above configuration, has a plurality of structural members that include at least a frame-shaped frame member and a plurality of bottom plate rods, so that it can be repeatedly assembled and disassembled as a bed-type wooden assembly furniture, the frame member includes at least an outer frame that is rectangular in plan view, formed by assembling a pair of vertical frame members and a pair of horizontal frame members, and an intermediate frame that is installed between the pair of vertical frame members so as to divide the outer frame in plan view, and is assembled by fitting together the connecting parts provided on each, the plurality of bottom plate rods are installed between the pair of horizontal frame members and the intermediate frame, each having the connecting parts provided on each The components are assembled by fitting them together, and the tensioning member is stretched between the pair of horizontal frame members. When tension is applied to the tensioning member by the tensioning mechanism, the connected state of the frame member and the plurality of bottom plate rods is maintained, resulting in the assembled state of the bed-type wooden assembly furniture. When the tension on the tensioning member by the tensioning mechanism decreases, the pair of vertical frame members, the pair of horizontal frame members, and the intermediate frame are separated, and the plurality of bottom plate rods can be removed from the frame member, allowing the bed-type wooden assembly furniture to be disassembled.

[0014] In the wooden assembly furniture of the present invention, a configuration may be adopted in which at least a portion of the connecting parts provided on the pair of vertical frame members, the pair of horizontal frame members, the intermediate frame, and the plurality of bottom plate rod members are of a joint structure.

[0015] In the wooden assembly furniture of the present invention, a configuration may be adopted in which a plurality of grounding legs are provided on the grounding surface side of at least one of the pair of vertical frame members, the pair of horizontal frame members, and the intermediate frame that constitute the frame member.

[0016] In the wooden assembly furniture of the present invention, the tensioning member can be made of any of the following flexible members: a string, a band, or a wire.

[0017] In the wooden assembled furniture of the present invention, in the above configuration, a plurality of tension members may be provided and arranged so as to uniformly apply the tension in different directions to the plurality of structural members.

[0018] In the wooden assembled furniture of the present invention, in the above configuration, the tension applying mechanism may adopt a configuration in which the adjusting means is composed of any one of a spring member, an elastic member, bolt fastening, or a ratchet mechanism and is capable of automatically adjusting the tension.

Effects of the Invention

[0019] According to the wooden assembled furniture of the present invention, as described above, it is provided detachably to a plurality of structural members, arranged near each connecting portion or penetrating through the inside of the connecting portion, and includes a tension member that maintains the fitting state at the connecting portion, thereby enhancing the accuracy of positioning and shape retention by the connecting portion of the fitting structure. Furthermore, by providing a tension applying mechanism having an adjusting means for applying a predetermined tension to the tension member and maintaining or adjusting the tension, excellent rigidity and stability as a wooden structure can be obtained. Therefore, it is possible to realize a wooden assembled furniture that can maintain excellent fixing strength and appearance characteristics and enhance structural and design stability even when a wooden structure according to a conventional construction method is adopted and assembly and disassembly are repeated frequently.

[0020] Other objects, features, and advantages of the present invention will become apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

Brief Description of the Drawings

[0021] [Figure 1] FIG. 1 is a diagram schematically illustrating an example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is a perspective view seen obliquely from above in a state where two assembled tables are arranged side by side. [Figure 2]FIG. 2 is a diagram schematically illustrating an example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is a top view of the two tables arranged side by side shown in FIG. 1 as seen from directly above. [Figure 3] FIG. 3 is a diagram schematically illustrating an example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is a side view of the table shown in FIGS. 1 and 2 as seen from one side. [Figure 4] FIG. 4 is a diagram schematically illustrating an example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is a side view of the table shown in FIGS. 1 and 2 as seen from the other side. [Figure 5] FIG. 5 is a diagram schematically illustrating an example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is a partially enlarged view showing the tension member and the tension applying mechanism shown in FIG. 3. [Figure 6] FIG. 6 is a diagram schematically illustrating an example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is a partially enlarged view showing the tension member and the tension applying mechanism shown in FIG. 3. [Figure 7] FIG. 7 is a diagram schematically illustrating another example of a table which is an embodiment of the wooden assembled furniture according to the present invention, and is an exploded perspective view showing the table in a state of being disassembled into members. [Figure 8] FIG. 8 is a diagram schematically illustrating an example of a bed which is an embodiment of the wooden assembled furniture according to the present invention, and is a perspective view of the assembled bed as seen from obliquely above. [Figure 9] FIG. 9 is a diagram schematically illustrating an example of a bed which is an embodiment of the wooden assembled furniture according to the present invention, and is a perspective view of the bed shown in FIG. 8 as seen from obliquely below. [Figure 10] FIG. 10 is a diagram schematically illustrating an example of a bed which is an embodiment of the wooden assembled furniture according to the present invention, and is a top view of the bed shown in FIG. 8 as seen from directly above. [Figure 11] FIG. 11 is a diagram schematically illustrating an example of a bed which is an embodiment of the wooden assembled furniture according to the present invention, and is a side view of the bed shown in FIG. 8 as seen from one side. [Figure 12] Figure 12 is a schematic diagram illustrating another example of a bed, which is one embodiment of the wooden assembly furniture according to the present invention, and is a top view of the assembled bed seen from directly above. [Modes for carrying out the invention]

[0022] The following describes embodiments of the wooden assembly furniture according to the present invention in detail, with reference to the drawings as appropriate. Please note that, for the sake of clarity, the drawings used in the following description may show slightly enlarged versions of characteristic parts in order to illustrate the features of the wooden assembly furniture of the present invention, and the dimensional ratios of each component may differ from those of the actual product. Furthermore, the materials, dimensions, etc. exemplified in the following description are merely examples, and the present invention is not limited to them. It can be implemented with appropriate modifications without altering the essence of the invention.

[0023] The wooden prefabricated furniture according to the present invention is a wooden prefabricated furniture made of a wooden structure in which multiple structural members are detachably attached to each other and can be repeatedly assembled and disassembled. In this embodiment, although the details of each example will be described later, each of the multiple structural members described above has one or more connecting parts having a concave or concave shape that allows for connection and positioning by fitting with other structural members. Furthermore, the wooden prefabricated furniture of this embodiment is equipped with a tensioning member that is detachably provided to at least some of the above multiple structural members and is positioned near the connecting part or positioned to penetrate the inside of the connecting part, thereby maintaining the fitted state at the connecting part. The wooden prefabricated furniture of this embodiment is equipped with a tensioning mechanism that applies a predetermined tension to the tensioning member and has an adjustment means for maintaining or adjusting the tension.

[0024] Examples of wooden assembly furniture, as described above, include tables and beds (which will be detailed later), as well as shelves, boxes, racks, chests of drawers, chairs, stools, sofas, desks, sideboards, wagons, and chests.

[0025] Furthermore, while solid wood is preferred as a wood material for the wooden assembled furniture according to the present invention due to its superior texture and design, the wooden assembled furniture of the present invention can also utilize processed wood materials such as laminated timber, LVL (Laminated Veneer Lumber), particleboard, MDF, plywood, lumber core, OSB (Oriented Strand Board), and CLT (Cross Laminated Timber).

[0026] <First Embodiment: Table> The wooden assembly furniture of the first embodiment of this embodiment will be described with reference to Figures 1 to 7. In this embodiment, a table 1 (1A) including a top plate member 2 (2A) and a leg member 3 (3A) will be used as an example of wooden assembly furniture.

[0027] Figure 1 is a schematic diagram illustrating a table 1, which is an example of wooden assembled furniture in this embodiment. It is a perspective view taken from diagonally above with two assembled tables 1 placed side by side. Figure 2 is a top view of the two tables 1,1 arranged side by side as shown in Figure 1, viewed from directly above. Figure 3 is a side view of table 1,1 shown in Figures 1 and 2, viewed from one side, and Figure 4 is a side view viewed from the other side. Figures 5 and 6 are enlarged partial views showing the tensioning member 4 and tensioning mechanism 5 provided in the tables 1,1 shown in Figure 3. Figure 7 is a schematic diagram illustrating another example of this embodiment, Table 1A, and is an exploded perspective view showing Table 1A disassembled into its component units.

[0028] Table 1, an example of wooden assembly furniture described in this embodiment, includes, as described above, a plurality of structural members, a connecting part, a tensioning member, and a tensioning mechanism. More specifically, Table 1 is a table-type wooden piece of furniture that can be repeatedly assembled and disassembled, as the aforementioned structural members include at least a plate-shaped tabletop member 2 and a plurality of elongated leg members 3. Although Figures 1 and 2 show an example where two Table 1 units are placed side by side, the following explanation will use a single Table 1 unit as an example.

[0029] The top plate member 2 is a plate-shaped member with a flat upper surface 2a. The lower surface 2b of the top plate member 2 is provided with one connecting portion 21 that connects to the leg member 3, which will be described in detail later. In the example shown in Figures 1 to 5, the one connecting portion 21 consists of a positioning hole 21a that penetrates the top plate member 2 from the upper surface 2a to the lower surface 2b, a thin plate-shaped retaining plate 21b that protrudes from the lower surface 2b, and a round bar 21c that is fixedly positioned in a convex shape on the lower surface 2b. Furthermore, the top plate member 2 in the illustrated example is provided with a tensioning plate 22 that protrudes significantly from the bottom surface 2b, near the center in the width direction (horizontal direction in Figures 2 and 3) of the bottom surface 2b. This tensioning plate 22 is configured to apply tension to the tensioning member 4, which will be described in detail later.

[0030] The positioning holes 21a are provided in pairs at four locations on the top plate member 2, arranged in a square shape when viewed from above, and consist of a total of eight through holes. A part of the other connecting portion 31 of the leg member 3 (a pair of elastic members 31d, 31d), which will be described in detail later, is fitted into the positioning holes 21a. As described above, the retaining plate 21b is provided so as to protrude from the lower surface 2b, thereby enabling it to hold a part of the other connecting portion 31 of the leg member 3 from the side. Each round bar 21c is formed by fixing a rod-shaped member to the lower surface 2b in a convex shape. Two of these round bars are arranged parallel to each other at a predetermined interval in the width direction of the lower surface 2b (the lateral width direction in Figures 2 and 3), thereby forming a part of one of the connecting sections 21. In the illustrated example, two more round bars 21c are arranged on the outside in the width direction of the lower surface 2b, resulting in four round bars 21c arranged parallel to each other at equal intervals.

[0031] The leg member 3 is a roughly elongated plate-shaped member, with one end 3a having a connecting portion 31 that connects to one of the connecting portions 21 on the top plate member 2 side, and the other end 3b being the ground-contacting end. The leg member 3 in the example shown in Figure 3 is shaped to be inclined when viewed from the front, when positioned so that one end 3a and the other end 3b, which is the ground-contacting end, are horizontal.

[0032] As shown in Figures 3 to 5, the other connecting portion 31 is composed of a pair of protrusions 31a, 31b and a recess 31c positioned between these protrusions 31a, 31b, opening at one end 3a and having a semicircular bottom. In addition, the connecting portion 31 in the illustrated example has a pair of elastic members 31d, 31d positioned on the opposite side of the recess 31c of the pair of protrusions 31a, 31b.

[0033] The recess 31c, secured between the pair of protrusions 31a and 31b, is configured such that the round bar 21c constituting one of the connecting portions 21 in the top plate member 2 described above can be fitted into it, thereby enabling the positioning of one connecting portion 21 and the other connecting portion 31. Furthermore, the pair of elastic members 31d, 31d are connected at their upper ends to a positioning hole 21a that constitutes one of the connecting portions 21 in the top plate member 2 using a fitting structure, thereby enabling the positioning and temporary fixing of one connecting portion 21 and the other connecting portion 31.

[0034] The tensioning member 4 is positioned near one connecting portion 21 of the top plate member 2 and the other connecting portion 31 of the leg member 3, and is configured in a band shape in the example shown in Figure 4. In the examples shown in Figures 3 to 5, the tensioning member 4 is positioned so as to be stretched over the bracing plate 22 of the top plate member 2 between the two connecting portions 21 and the other connecting portion 31, and is configured to generate tension in a direction that tightens the one connecting portion 21 and the other connecting portion 31. The tensioning member 4 is also equipped with a tension-applying mechanism 5 capable of maintaining or holding its tension, and in the examples shown in Figures 3 and 6, the tensioning member 4 is attached at a position corresponding to the top 22a of the bracing plate 22 on which it is stretched. Furthermore, both ends 4a, 4a of the tensioning member 4 are secured to the positions of two round bars 21c, 21c, which are positioned outward in the width direction of the table 1 (horizontal direction in Figure 3), while the table 1 is stretched taut.

[0035] With the above configuration, when tension is applied to the tension member 4 by adjusting the adjustment means 51 in the tension-applying mechanism 5, which will be described in detail later, the connected state is maintained by the fitting of one connecting part 21 and the other connecting part 31. As a result, the top plate member 2 and the multiple leg members 3 are assembled into a table-type wooden assembly furniture, that is, the table 1 of this embodiment. On the other hand, when the tension of the tension member 4 is reduced by adjusting the adjustment means 51 of the tension-applying mechanism 5, one connecting part 21 and the other connecting part 31 are separated, so that the table 1 of this embodiment can be disassembled into the tabletop member 2 and the multiple leg members 3.

[0036] The material of the tensioning member 4 is not particularly limited, and various materials with elasticity and flexibility can be used without any restrictions. For example, flexible materials made of natural fibers or resins, in the form of strings, bands, or wires, can be appropriately selected as such.

[0037] Furthermore, the tensioning member 4 is not limited to those made of natural fibers or resin as described above. For example, it is also possible to use a wire, a metal band, or a heat-shrinkable resin sleeve, and adopt a configuration that forms a tensioned state through shrinkage force caused by heating.

[0038] In the example table 1 shown in Figure 4, the tension members 4 are provided at a rate of two per table, corresponding to the number of combinations of one connecting section 21 and the other connecting section 31. However, the configuration is not limited to this; a configuration with only one tension member 4 is also possible, or a configuration with three or more tension members may be adopted. Furthermore, as shown in the illustrated example, a configuration may be adopted in which multiple tension members 4 are provided and arranged to apply uniform tension in different directions. In the example shown in Figure 4, the two tension members 4 provided on the table 1 are arranged in approximately parallel directions and are positioned to apply uniform tension in different directions within the table 1. By arranging multiple tension members 4 in the above configuration, the accuracy of positioning and shape retention between each member can be further improved.

[0039] As described above, the tension-applying mechanism 5 applies a predetermined tension to the tensioning member 4 and has an adjustment means 51 for maintaining or adjusting the tension. In the examples shown in Figures 3 and 6, it is attached to the tensioning member 4 at a position corresponding to the top 22a of the bracing plate 22. In the illustrated example of the tension-applying mechanism 5, the adjustment means 51 is composed of a binding plate that can adjust the tension by sandwiching the band-shaped tensioning member 4 in the thickness direction. In addition to applying and maintaining tension to the tensioning member 4, it is also possible to readjust the tension if it starts to loosen.

[0040] As the adjustment means 51 of the tension-applying mechanism 5, in addition to the configuration using the fastening plate as described above, it is also possible to adopt a configuration using a mechanical tensioning mechanism such as a ratchet buckle, a turnbuckle, or bolt fastening.

[0041] Furthermore, the adjustment means provided in the tension-applying mechanism 5 is not limited to a configuration that allows for manual tightening, such as the adjustment means 51 described above. Although detailed illustrations are omitted, the adjustment means may consist of, for example, a spring member, an elastic member, or a ratchet mechanism, and a configuration may be adopted that allows for automatic adjustment of the tension applied to the tension member 4 by the tension-applying mechanism 5.

[0042] According to this embodiment, with the above configuration, even when a wooden structure using conventional construction methods is used and assembly and disassembly are repeated frequently, it is possible to realize a table 1 that maintains excellent fixing strength and appearance characteristics, enhances structural and design stability, and can be easily assembled and disassembled. Furthermore, by packing the disassembled components into, for example, portable cardboard boxes, the overall packaging becomes more compact, making transportation easier and more flexible, and also reducing the storage space required.

[0043] In this embodiment, the table 1 has an assembly structure in which the fitting between the tabletop members 2 and leg members 3, which are multiple structural members, is a positioning structure rather than a fixing structure, and the assembled state between each member is maintained by tension applied by a tension member 4 and a tension-applying mechanism 5. In other words, in this embodiment, the fitting structure of each connecting part is limited to the role of positioning and shape retention only, and the rigidity and stability of the wooden structure are ensured by applying tension, which is an external force, thereby separating the functions into "positioning means" and "fixing means". By adopting a configuration with the functional separation described above, even if wear occurs in the interlocking structure or dimensional changes occur in the solid wood, for example, the stability of the entire structure can be restored by readjusting the tension using the adjustment means 51 of the tension-applying mechanism 5. As a result, even when using solid wood, which is disadvantageous from the viewpoint of dimensional stability and homogeneity but superior from the viewpoint of design, a table 1 with excellent rigidity and stability as a wooden structure can be realized. Furthermore, since no metal parts such as screws are used, there is no concern that metal parts and solid wood will adhere to each other, so permanent deformation of the solid wood can be suppressed.

[0044] According to Table 1 of this embodiment, by adopting the above configuration, even if the Table 1 is frequently assembled and disassembled, for example, during relocation or tours of event venues, it is possible to maintain excellent fixing strength and appearance characteristics while allowing wear to occur at the mating points, which is an extremely excellent effect.

[0045] Furthermore, the connection structure between the multiple structural members in this embodiment, namely the top plate member 2 and the leg members 3, is not limited to the simple interlocking of concave and concave shapes described above. As will be explained in the second embodiment described later, the connection structure between the multiple structural members may be, for example, a configuration in which a joint structure based on traditional construction methods such as dovetail joints or three-way joints is precisely reproduced by NC machining (numerical control machining), and an external tensioning force is applied to this joint structure by a tensioning member 4.

[0046] If a machining method is adopted that reproduces the joint structure using NC machining as described above, a flexible multi-site manufacturing process can be realized, for example, using a distributed on-demand manufacturing system as described below. Specifically, for example, by manufacturing components based on numerical information (NC data) output by pre-cutting machines and NC processing machines for construction, specific cut data (NC data) can be shared via a network, without depending on the skill level or individuality of skilled workers. This enables high-precision product manufacturing and product distribution using local timber (locally sourced timber) at manufacturing bases in various locations.

[0047] It should be noted that the wooden assembly furniture table of this embodiment is not limited to the configuration of Table 1 shown in Figures 1 to 6. For example, a simpler configuration, such as Table 1A shown in Figure 7, can also be adopted. Note that in Figure 7, for explanatory purposes, Table 1A is shown disassembled into its individual components.

[0048] The table 1A shown in Figure 7 comprises a tabletop member 2A, leg members 3A, a bottom plate 6, and a tensioning member 4A. A total of four leg members 3A and the bottom plate 6 are arranged on the bottom surface 2b of the tabletop member 2A, which is opposite to the top surface 2a.

[0049] The upper end of the leg member 3A is provided with a connecting portion 31A having an uneven shape, and is configured to be fitted from the lower surface 2b side of the top plate member 2A. The bottom plate 6 also has four corners with uneven cutouts, which allows the connecting portion 31A of the leg member 3A to be fitted, and is configured to be attached to the lower surface 2b side of the top plate member 2A together with the leg member 3A.

[0050] As described above, with the top plate member 2A, bottom plate 6, and leg members 3A assembled, tension members 4A can be attached so as to surround the four leg members 3A and bottom plate 6, thereby enabling them to be held in place by the tension provided by the tension members 4A. These tension members 4A can be configured to also serve as a tension-applying mechanism, for example, by making at least a portion of them from a rubber material.

[0051] <Second Embodiment> A second embodiment of wooden prefabricated furniture of this embodiment will be described with reference to Figures 8 to 12. In this embodiment, a bed 100 including a frame-shaped frame member 200 and a plurality of bottom plate rod members 300 will be used as an example of wooden prefabricated furniture. In the following description, detailed explanations of components common to or similar to those of the wooden prefabricated furniture of the first embodiment may be omitted.

[0052] Figure 8 is a schematic diagram illustrating a bed 100, which is an example of wooden prefabricated furniture according to this embodiment. It is a perspective view of the assembled bed 100 seen from diagonally above. Figure 9 is a perspective view of bed 100 shown in Figure 8, viewed from diagonally below. Figure 10 is a top view of the bed 100 shown in Figure 8, viewed from directly above. Figure 11 is a side view of the bed 100 shown in Figure 8, viewed from one side. Figure 12 is a schematic diagram illustrating another example of this embodiment, bed 100A, and is a top view of the assembled bed 100A seen from directly above.

[0053] The bed 100, an example of wooden prefabricated furniture described in this embodiment, includes a plurality of structural members, connecting parts, tensioning members, and a tensioning mechanism, similar to the wooden prefabricated furniture of the first embodiment. More specifically, the bed 100 is a bed-type wooden modular furniture piece that can be repeatedly assembled and disassembled, as the aforementioned structural members include at least a frame-shaped member 200 and multiple base plate rods 300.

[0054] The frame member 200 includes an outer frame 210 that is rectangular in plan view, formed by assembling a pair of vertical frame members 211, 211 and a pair of horizontal frame members 212, 212, and an intermediate frame 220 that is installed between the pair of vertical frame members 211, 211.

[0055] The outer frame 210 is assembled by fitting together a pair of vertical frame members 211, 211 and a pair of horizontal frame members 212, 212 with vertical frame connecting parts (connecting parts) 211a, 211a and horizontal frame connecting parts (connecting parts) 212a, 212a, which are provided at both ends of each. Furthermore, each of the pair of horizontal frame members 212, 212 of the outer frame 210 is provided with two through holes 212c, 212c, to which a tensioning member 400 (details to be described later) is attached via a tensioning mechanism 500.

[0056] As described above, the intermediate frame 220 is installed between a pair of vertical frame members 211, 211 and is positioned parallel to a pair of horizontal frame members 212, 212 so as to divide the outer frame frame 210 in a plan view. In the example shown in Figure 8, the pair of vertical frame members 211, 211 that constitute the outer frame 210 of the frame member 200 are arranged in pairs, with two of them placed side by side in the longitudinal direction of the vertical frame members 211, 211. As a result, in the illustrated example, the clamping connecting parts (connecting parts) 220a, 220a located near both ends of the intermediate frame 220 are fitted and connected so as to be clamped between the vertical frame connecting parts 211a, 211a of the pair of vertical frame members 211, 211.

[0057] Multiple base plate rods 300 are assembled to the frame member 200 by connecting parts provided on each, so as to be installed between a pair of horizontal frame members 212, 212 and the intermediate frame 220. In the example shown in Figure 8, etc., the base plate connecting parts (connecting parts) 300a, 300a provided on both ends of the multiple base plate rods 300 are fitted into multiple intermediate connecting parts (connecting parts) 220b, 220b provided in a concave shape on the intermediate frame 220, or into multiple end connecting parts (connecting parts) 212b, 212b provided in a concave shape on the pair of horizontal frame members 212, 212.

[0058] In this embodiment, it is preferable from the viewpoint of superior fitting strength and alignment accuracy that at least a portion of the connecting parts provided on each of the pair of vertical frame members 211, 211, the pair of horizontal frame members 212, 212, the intermediate frame 220, and the multiple bottom plate rod members 300 are of a dovetail joint structure. In the example shown in Figures 8 to 10, the vertical frame connecting parts 211a, 211a, the horizontal frame connecting parts 212a, 212a, and the clamping connecting parts 220a, 220a are of a dovetail joint structure, while the fitting structure between the intermediate connecting parts 220b, 220b and the bottom plate connecting parts 300a, 300a is of a simple concave-concave joint structure from the viewpoint of ease of assembly.

[0059] In addition, in the illustrated example, multiple grounding legs 230 are provided on the ground-contacting side of at least one of the pair of vertical frame members 211, 211, the pair of horizontal frame members 212, 212, and the intermediate frame 220 that constitute the frame member 200. In the example shown in Figures 8 and 9, a total of six grounding legs 230 are provided, two on each of the ground-contacting sides of the pair of horizontal frame members 212, 212 and the intermediate frame 220.

[0060] The tensioning member 400 is stretched between a pair of horizontal frame members 212, 212, as shown in Figure In the example shown in Figure 10, two tension members 400 are arranged so as to be spaced apart near both ends in the width direction (horizontal direction in Figure 10) of the pair of horizontal frame members 212, 212. In the illustrated example, each of the two tension members 400 is engaged with one of the two insertion holes 212c, 212c provided in each of the pair of horizontal frame members 212, 212 via a tension-applying mechanism 500, which will be described in detail later. In the illustrated example, the tension-applying mechanism 500 is connected to each end of the tension member 400.

[0061] The tension-applying mechanism 500 applies a predetermined tension to the tension member 400 and has an adjustment means 510 for maintaining or adjusting the tension. The tension-applying mechanism 500 in the example shown in Figure 10 has an adjustment means 510 consisting of a bolt 510a and a nut 510b. The tension-applying mechanism 500 in the illustrated example also includes a hook 520 that connects the adjustment means 510 to the end of the tension member 400.

[0062] The bolt 510a constituting the adjustment means 510 is a key-shaped member in plan view, with one end threaded into a bolt shape, although detailed illustration is omitted in Figure 10. The nut 510b is designed to be screwed onto one end of the bolt 510a, and in the illustrated example, it is fixed so as to be embedded in the insertion hole 212c provided in the pair of horizontal frame members 212, 212.

[0063] The hook 520 is a hook-shaped member capable of hooking both ends of the tensioning member 400, and connects the tensioning member 400 to the tensioning mechanism 500, thereby stretching the tensioning member 400 between a pair of horizontal frame members 212, 212. In this way, the hook 520 transmits the tension applied from the tensioning mechanism 500 to the tensioning member 400.

[0064] The tension-applying mechanism 500, with the above configuration, applies tension to the tension member 400 by rotating the bolt 510a that constitutes the adjustment means 510, thereby screwing it into the nut 510b and generating a force that pulls the tension member 400 from both ends. On the other hand, when reducing the tension of the tension member 400, the force that pulls the tension member 400 from both ends is reduced by rotating the bolt 510a, thereby loosening the screwing state into the nut 510b.

[0065] In this embodiment, it is more preferable that the screw hole in the nut 510b of the tension-applying mechanism 500 is positioned eccentrically in the radial direction of the nut 510b (see the dashed line in the nut 510b in Figure 10). By positioning the screw hole of the nut 510b eccentrically in this way, it is possible to facilitate the processing of wood materials by the pre-cutting machine described above, while also preventing the bolt 510a and the nut 510b from rotating together when tension is applied to the tensioning member 400 by the tension-applying mechanism 500.

[0066] In this embodiment, the bed 100, with the outer frame 210 and intermediate frame 220 constituting the frame member 200, and the multiple bottom plate rods 300 assembled, maintains the assembled state between each member when tension is applied to the tension member 400 by adjusting the adjustment means 510 of the tension application mechanism 500. As a result, the frame member 200 and the multiple bottom plate rods 300 are assembled into a bed-type wooden assembly furniture, i.e., the bed 100 of this embodiment.

[0067] On the other hand, when the tension of the tension member 400 is reduced by adjusting the adjustment means 510 of the tension-applying mechanism 500, the pair of vertical frame members 211, 211, the pair of horizontal frame members 212, 212, and the intermediate frame 220 are separated from each other. Furthermore, by removing the multiple bottom plate rod members 300 from the frame member 200, the bed 100 of this embodiment becomes disassembled into the pair of vertical frame members 211, 211, the pair of horizontal frame members 212, 212, the intermediate frame 220, and the multiple bottom plate rod members 300.

[0068] Furthermore, as in the first embodiment, by packing each disassembled component into, for example, a transportable cardboard box, the packaging becomes compact, making transportation easy and convenient, and also reducing the space required for storage.

[0069] It should be noted that the wooden assembly furniture bed of this embodiment is not limited to the configuration of bed 100 shown in Figures 8 to 11. For example, as shown in bed 100A in Figure 12, it is also possible to adopt a configuration in which two tension members 400A are arranged roughly along the diagonal when the bed 100A is viewed from above, so that tension can be applied uniformly in different directions within the bed 100A. The bed 100A shown in Figure 12 differs from the bed 100 shown in Figures 8 to 11 only in the configuration of the tensioning member 400A and the tensioning mechanism 500A; the other configurations are almost the same.

[0070] In the bed 100A shown in Figure 12, the two tension members 400A have their respective ends 400a locked near the ends of a pair of horizontal frame members 212, 212 (see Figure 10) that constitute the outer frame 210. Furthermore, the intermediate regions of each tension member 400A in the longitudinal direction are stretched in a roughly M-shape in plan view by arranging locking fittings (not shown) so that they are routed around a bracing plate 221 provided on the intermediate frame 220A. With the above configuration, the bed 100A is configured as a tension-applying mechanism 500A including the bracing plate 221 and locking fittings (not shown). By stabilizing the tension members 400A in the above manner, tension is applied to the tension members 400A by the bracing plate 221.

[0071] <Effects and Effects> As described above, the table 1 and bed 100, which are wooden assembled furniture of this embodiment, are provided with tension members 4,400 that are detachably attached to multiple structural members and positioned near each connecting part or so as to penetrate the inside of the connecting part, thereby maintaining the fitted state at the connecting part. This further improves the accuracy of positioning and shape retention by the connecting part of the fitted structure. Furthermore, by providing a tension-applying mechanism 5,500 that applies a predetermined tension to the tension member 4,400 and has adjustment means 51,510 for maintaining or adjusting the tension, excellent rigidity and stability as a wooden structure can be obtained. Therefore, even when using a wooden structure constructed using conventional methods and undergoing frequent assembly and disassembly, a table 1 or bed 100 can be realized that maintains excellent fixing strength and appearance characteristics, thereby enhancing structural and aesthetic stability.

[0072] In other words, the following points can be cited as more detailed technical effects of the wooden assembly furniture according to the present invention. First, the problem of wear and loosening of interlocking parts when assembled and disassembled frequently, which was difficult with conventional wooden assembly furniture, can be solved by applying continuous tension using tensioning members and tension-applying mechanisms, thereby maintaining the rigidity and stability of the structure over the long term. Furthermore, even if drying shrinkage unique to solid wood occurs, or if dimensional changes occur due to aging, the structural integrity can be easily restored by readjusting (retightening) the tension using tensioning members and tension-applying mechanisms. Therefore, a stable structure can be achieved through design and manufacturing that takes into account the aging process of wood.

[0073] Furthermore, the following can be cited as business benefits and social contribution benefits that can be realized with respect to the wooden assembly furniture according to the present invention. First, because wooden prefabricated furniture is easy to disassemble, maintain, and replace parts for, it can be designed as a product suitable for a "circular economy" that differs from a disposable society, and its value can increase over time. In other words, it can be designed as wooden prefabricated furniture suitable for long-term circular use. Furthermore, because wooden assembly furniture can be used semi-permanently, it becomes easier to develop into highly profitable circular businesses such as rental, subscription, and buyback guarantees, rather than simply selling furniture outright.

[0074] Furthermore, by adopting the distributed on-demand manufacturing system described above, instead of transporting the manufactured products themselves, processing data (NC data) can be shared over a network, allowing for the production of assembled wooden furniture using locally sourced materials at various locations. This reduces logistics costs and CO2 emissions significantly while also contributing to the revitalization of local forestry, thus simultaneously achieving environmental impact reduction through the use of locally sourced materials and distributed manufacturing.

[0075] Furthermore, in the cascade utilization of wood, that is, the upstream process of recycling from solid wood to laminated wood, plywood to particleboard to MDF, solid wood, due to its characteristics, is difficult to incorporate into industrialized production lines, and therefore has had little demand in conventional wood-based assembled products. However, by applying this invention, the use of solid wood in wood-based assembled furniture can be promoted, which will lead to a reduction in environmental impact and the revitalization of the forestry industry.

[0076] <Modified version of the present invention> Although embodiments of the present invention have been described in detail above, the wooden assembly furniture of the present invention is not limited to the embodiments described above, and can be implemented with various changes and modifications as long as they do not depart from the principles of the present invention and the scope of the appended claims. [Industrial applicability]

[0077] The wooden assembly furniture of the present invention employs a wooden structure using conventional construction methods, and even when assembled and disassembled frequently, it can maintain excellent fixing strength and appearance characteristics, thereby enhancing structural and design stability. Therefore, the wooden assembly furniture of the present invention is very suitable for applications that require frequent transportation and storage, such as tables, beds, shelves, boxes, racks, chests of drawers, chairs, stools, sofas, desks, sideboards, wagons, chests, etc., where assembly and disassembly can be done by interlocking solid wood pieces. [Explanation of symbols]

[0078] 1.1A…Table (Wooden assembly furniture) 2,2A...Top plate component 2a…Top surface 2b…Bottom surface 21... One of the connecting parts (connecting part) 21a…Positioning hole 21b...Pressing plate 21c…Round bar 22...Tension board 22a...Top 3,3A…leg member 3a…one end 3b…Other end 31, 31A... The other connecting part (connecting part) 31a, 31b... convex parts 31c…recess 31d... A pair of elastic members (elastic members) 4,4A...Tensioning member 4a, 4a... both ends 5...Tension-applying mechanism 51...Adjustment means 100, 100A... Bed (Wooden assembly furniture) 200... Frame components 210... Outer frame 211... A pair of vertical frame members (vertical frame members) 211a... Vertical frame connecting section (connecting section) 212... A pair of horizontal frame members (horizontal frame members) 212a...Horizontal frame connection part (connection part) 212b...Terminal connection part (connection part) 212c... Through hole 220...Intermediate frame 220a...Pinch connection part (connection part) 220b…Intermediate connection part (connection part) 221...Tension board 230...Grounding leg 300…Bottom plate bar material 300a…Bottom plate connection part (connection part) 400, 400A… Tension members 400a, 400a... both ends 500...Tension-applying mechanism 510…Adjustment means 510a... Bolt 510b...nut 520... Hook

Claims

1. A wooden assembly furniture made of a wooden structure in which multiple structural members are detachable from each other and can be repeatedly assembled and disassembled, Each of the aforementioned plurality of structural members has one or more connecting parts having an uneven shape that allows for connection and positioning by fitting with other structural members. moreover, A tensioning member is provided detachably to at least some of the plurality of structural members and is positioned near the connecting portion or positioned to penetrate the interior of the connecting portion, thereby maintaining the fitted state at the connecting portion. A tension-applying mechanism having an adjustment means for applying a predetermined tension to the tensioning member and for maintaining or adjusting the tension, Wooden assembly furniture characterized by having the following features.

2. The aforementioned plurality of structural members include at least a plate-shaped top plate member and a plurality of leg members, so that the table-type wooden assembly furniture can be repeatedly assembled and disassembled. The top plate member has a flat upper surface and is provided with one of the connecting parts on its lower surface, which connects to the leg member. The leg member has one end on which the other connecting portion is connected to the first connecting portion, and the other end is the ground-contacting end. The tensioning member is positioned near the one connecting portion and the other connecting portion. When the tension is applied to the tensioning member by the tension-applying mechanism, the connected state formed by the fitting of one connecting part and the other connecting part is maintained, so that the top plate member and the plurality of leg members are assembled into the table-type wooden assembly furniture. The wooden assembly furniture according to claim 1, characterized in that when the tension of the tensioning member by the tension-applying mechanism decreases, the one connecting part and the other connecting part can be separated, thereby allowing the table-type assembly furniture to be disassembled into the tabletop member and the plurality of leg members.

3. The aforementioned plurality of structural members include at least a frame-shaped frame member and a plurality of base plate rods, so that they can be repeatedly assembled and disassembled as a bed-type wooden assembly furniture. The frame member includes at least an outer frame that is rectangular in plan view, formed by assembling a pair of vertical frame members and a pair of horizontal frame members, and an intermediate frame that is erected between the pair of vertical frame members so as to divide the outer frame in plan view, and is assembled by fitting together the connecting parts provided on each of them. The aforementioned plurality of base plate rods are assembled by fitting together the connecting portions provided for each of them so that they are installed between the pair of horizontal frame members and the intermediate frame. The tensioning member is stretched between the pair of horizontal frame members, When the tension is applied to the tensioning member by the tension-applying mechanism, the connected state of the frame member and the plurality of bottom plate rods is maintained, resulting in the assembled state of the bed-type wooden assembly furniture. The wooden assembly furniture according to claim 1, characterized in that when the tension of the tensioning member by the tension-applying mechanism decreases, the pair of vertical frame members, the pair of horizontal frame members, and the intermediate frame are separated, and furthermore, the plurality of bottom plate rod members are removed from the frame members, thereby making the bed-type wooden assembly furniture disassembled.

4. The wooden assembly furniture according to claim 3, characterized in that at least a portion of the connecting parts provided on the pair of vertical frame members, the pair of horizontal frame members, the intermediate frame, and the plurality of bottom plate rod members are in the form of a joint structure.

5. The wooden assembly furniture according to claim 3 or 4, characterized in that a plurality of grounding legs are provided on the grounding surface side of at least one of the pair of vertical frame members, the pair of horizontal frame members, and the intermediate frame that constitute the frame member.

6. The wooden assembly furniture according to any one of claims 1 to 3, characterized in that the tensioning member is made of any flexible member in the shape of a string, a band, or a wire.

7. The wooden assembly furniture according to any one of claims 1 to 3, characterized in that a plurality of tensioning members are provided and are arranged to uniformly apply the tension to the plurality of structural members in different directions.

8. The tension-applying mechanism is characterized in that the adjustment means comprises a spring member, an elastic member, a bolt fastening, or a ratchet mechanism, and is capable of automatically adjusting the tension, as described in any one of claims 1 to 3.

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