Leg structure, table, and chair

Abstract

To provide a leg structure that is simple in structure yet robust and whose length can be changed to two patterns, long or short, and a table or chair having legs formed by the leg structure. [Solution] Leg components 21, which are attached in pairs to a table T or a chair to form a leg 2, comprise a first section 22 and a second section 23. The first section 22 is a rectangular frame body composed of a first frame 221 and a second frame 222, which form the long sides, and a third frame 223 and a fourth frame 224, which form the short sides, and has a first connection section 225a used for connection to the underside of a tabletop or the like. The second section 23 is shorter than the first frame 21 and the second frame 222, and has a first side frame 231 connected to the third frame 223 in a roughly T- or L-shape in end view, a second side frame 232 connected to the fourth frame 234 in a roughly T- or L-shape in end view, a cross frame 233 spanning between the base ends of the first and second side frames, and a second connection section 234 provided on the first side frame 231, which is used for connection to the underside of a tabletop or the like.

Description

[Technical Field]

[0001] This invention relates to a leg structure, a table and a chair equipped with legs having the same structure as the leg structure. More specifically, it relates to a leg structure that is simple yet sturdy and whose length can be changed to two patterns, long or short, and a table and a chair equipped with legs having the same structure as the leg structure. [Background technology]

[0002] Height-adjustable tables and chairs have been manufactured and sold for some time, and examples of such structures include tables with the structures shown in the following Non-Patent Documents 1 and 2. In both of these, the height of the entire table can be changed by extending or shortening the length (height) of the legs. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Quadro Table, 100cm Wide, Quadro Series Indoor Table, T&K Design Works, Inc., Internet <URL:https: / / item.rakuten.co.jp / onetouch-furniture / 96711tk / ?variantId=14&ultra_crid=96711tk&scid=af_pc_etc&sc2id=af_113_0_10001868&ultra_agid=&iasid=wes_rppexp_410043_&gclid=EAIaIQobChMIjtmVou6TkAMVJpqmAx3iSxKhEAQYAiABEgLBVPD_BwE&ifd=37791&ultra_advid=1588425176&ultra_cid=22520594625>

[0004] [Non-patent document 2] Belia 120 Height Adjustable Table Kanaken Internet <URL:https: / / item.rakuten.co.jp / kanaken / neria-120lifting-table / ?scid=af_pc_etc&sc2id=af_109_1_10000237> Summary of the Invention [Problem to be solved by the invention]

[0005] However, the table described in Non-Patent Document 1 requires the length of each leg to be adjusted, which is a cumbersome process, and the rigidity (load-bearing capacity) of the legs is somewhat insufficient.

[0006] Furthermore, the lift table described in Non-Patent Document 2 has a gas spring type telescoping leg structure, which allows for easy and precise adjustment of the leg (table) height, but as it requires relatively advanced technology to manufacture, it is prone to breakdowns such as gas leakage due to early deterioration depending on the manufacturer's technology, and maintenance is not possible, and as it deteriorates, the reaction force weakens and there is a risk of it suddenly falling, and in addition, it is vulnerable to external forces and is expensive.

[0007] The present invention was devised in consideration of the above points, and aims to provide a leg structure that is simple yet sturdy and can be changed to two different lengths (heights), and a table or chair with legs made up of such a leg structure. [Means for solving the problem]

[0008] In order to achieve the above object, the leg structure of the present invention is a leg that is attached to a table or chair as a set of at least two, and comprises a first part having a rectangular frame body composed of first and second frames that are long sides, and third and fourth frames that are short sides that are bridged between the first and second frames, and a first connection part that is provided on any of the first to fourth frames and is used to connect to the underside of the table top or the underside of the chair seat; The device comprises a first side frame having a front end connected to a frame and forming an approximately T-shape or an approximately L-shape in end view, a second side frame having a front end connected to the fourth frame and forming an approximately T-shape or an approximately L-shape in end view, a cross frame spanning between the base ends of the first side frame and the second side frame, and a second connection portion provided on at least the first side frame and used to connect to the underside of a table top or the underside of a chair seat, the first side frame and the second side frame being shorter than the first frame and the second frame.

[0009] The leg structures of the present invention have the above-described configuration, and by attaching at least two of them to a table or chair as a set, the legs of the table or chair can be configured.

[0010] Furthermore, the leg structure of the present invention has the above-mentioned configuration, so that the height of the table or chair to which it is attached can be changed. Specifically, by changing the attachment part to the table or chair to either the first part or the second part, the leg length of the table or chair can be selected from two patterns, long or short (in other words, two patterns of high or low leg height).

[0011] In the leg structure of the present invention, for example, when the first portion is connected to the underside of the table top or the underside of the chair seat using the first connecting portion (hereinafter referred to as the "first usage mode"), the length of the first side frame and the second side frame of the second portion becomes the leg length (height). On the other hand, in the leg structure of the present invention, when the second portion (first side frame) is connected to the underside of the table top or the underside of the chair seat using the second connecting portion (hereinafter referred to as the "second usage mode"), the length of the first frame and the second frame of the first portion and the cross frame of the second portion becomes the leg length (height).

[0012] As mentioned above, the first and second side frames are shorter than the first and second frames, so the legs are shorter (lower) in the first usage mode than in the second usage mode. In other words, the leg length is "first usage mode (short / low) < second usage mode (long / tall)".

[0013] In other words, a table to which the leg structure of the present invention is attached in the first usage mode becomes a so-called "low table," and a chair to which it is attached becomes a so-called "low chair" or "low bench." On the other hand, a table to which the leg structure of the present invention is attached in the second usage mode becomes a so-called "high table" compared to a table to which it is attached in the first usage mode, and a chair to which it is attached becomes a so-called "high chair" or "high bench" compared to a chair to which it is attached in the first usage mode.

[0014] Furthermore, the legs formed on a table or chair using the leg structure of this invention have a more robust structure than those of an extendable type, and when changing the height of the table or chair, it is only necessary to change the attachment point to either the first part or the second part, eliminating the need to adjust the length (height) of each leg.

[0015] In the leg structure of the present invention, the expression "generally T-shaped or L-shaped" regarding the first and second side frames of the second part refers to the shape in end view when the tip of the first side frame is connected to the third frame, or the shape in end view when the tip of the second side frame is connected to the fourth frame.

[0016] The expression "approximately T-shaped" is used to mean not only a perfect T-shape in which the tip of the first side frame (or second side frame) is connected to the longitudinal center of the third frame (or fourth frame), but also a shape in which the position where the tip of the first side frame (or second side frame) is connected is shifted toward both ends from the longitudinal center of the third frame (or fourth frame).

[0017] When the first side frame (or second side frame) of the second part is connected at its tip to the third frame (or fourth frame) to form an approximately T-shape in end view, it is well balanced when supporting the tabletop or chair seat, and particularly when an even number of leg components are used, it is possible to form legs that are arranged roughly symmetrically in either the first or second usage mode, resulting in a good-looking leg configuration.

[0018] The expression "substantially L-shaped" is used to mean not only a perfect L-shape in which the tip of the first side frame (or second side frame) is connected to one of the longitudinal ends of the third frame (or fourth frame), but also a shape in which the position where the tip of the first side frame (or second side frame) is connected is shifted toward the longitudinal center of the third frame (or fourth frame) from either end. Note that this mounting state can also be expressed as the position where the tip of the first side frame (or second side frame) is connected "near both ends of the third frame (or fourth frame)."

[0019] When the first side frame (or second side frame) of the second part is connected at its tip to the third frame (or fourth frame) so as to form an approximately L-shape in end view, when attached to the tabletop or chair seat in the first usage mode, the leg components can be spaced more apart than if they were approximately T-shaped, which prevents the leg components from hitting the user's legs and getting in the way; on the other hand, when attached to the tabletop or chair seat in the second usage mode, the leg components are arranged asymmetrically, allowing for the formation of legs with a unique appearance.

[0020] The above-mentioned expression "generally T-shaped or L-shaped" also has the same meaning in the case of tables and chairs equipped with the leg structures described below.

[0021] Furthermore, the leg structure described above may have a structure in which, in the first portion, the first and second frames are thicker or wider than the third and fourth frames, and in the second portion, the cross frame is thicker or wider than the first and second side frames.

[0022] According to the legs configured with the leg structure of this aspect, the ground contact area of ​​the horizontal frame increases and stability is enhanced in the first usage mode described above. Also, according to the legs of this aspect, the first frame, second frame, and horizontal frame that stand upright in the height direction become thicker in the second usage mode described above, and load-bearing capacity in the height direction is improved.

[0023] Furthermore, the leg structure described above may have a structure in which the second portion is provided so as to be separable from the first portion, or in which the second portion is provided so as to be disassembled into the first side frame, the second side frame, and the cross frame.

[0024] In comparison with conventional legs that are provided in a non-disassembly manner, the leg formed with the leg structure of this aspect can be made smaller in volume in the disassembled state, and furthermore, the separated or disassembled second part can be stored within the frame of the first part in a container such as a cardboard box, thereby making it possible to make the volume small (in other words, to prevent it from becoming bulky) when not assembled or not in use, such as during transportation or storage.

[0025] In order to achieve the above object, the present invention provides a table comprising a tabletop and legs each comprising a pair of leg components attached to the underside of the tabletop, each leg component having a first portion and a second portion, the first portion comprising a rectangular frame body formed by a first frame and a second frame that define the long sides, and a third frame and a fourth frame that define the short sides and are bridged between the first and second frames, and a first connection portion provided on any of the first to fourth frames and used for connection to the underside of the tabletop, the second portion having a first side connected to the third frame at its tip and forming a substantially T-shaped or L-shaped configuration in end view, the first and second side frames are shorter than the first and second frames, and a first usage mode in which the first portion is connected to the underside of the tabletop, or a second usage mode in which the third frame of the first portion and the first side frame of the second portion are connected to the underside of the tabletop, with the legs being longer than the first usage mode.

[0026] The table of the present invention has legs formed with the leg structures of the above-mentioned configuration, and by attaching the leg structures to the table in either the first or second usage mode, the length of the table legs can be selected from two patterns, long and short (in other words, the leg height can be selected from two patterns, high and low), which means the height of the table can be changed.

[0027] In the table of the present invention, when the leg components are attached in the first usage mode, the length of the first and second side frames of the second part becomes the leg length (height). On the other hand, in the table of the present invention, when the leg components are attached in the second usage mode, the length of the first and second frames of the first part and the cross frame of the second part becomes the leg length (height).

[0028] As mentioned above, the first and second side frames are shorter than the first and second frames, so the legs are shorter (lower) in the first usage mode than in the second usage mode. In other words, the leg length is "first usage mode (short / low) < second usage mode (long / tall)".

[0029] In other words, in this invention, a table with legs attached in the first usage mode becomes a so-called "low table," while a table with legs attached in the second usage mode becomes a so-called "high table" compared to a table attached in the first usage mode.

[0030] Furthermore, the table of the present invention has a robust structure that is less prone to mechanical failure than tables with extendable legs, and when changing the height of the table, it is only necessary to change the attachment method of the leg structure to either the first or second usage mode, eliminating the need to adjust the length (height) of each leg.

[0031] Furthermore, the above-mentioned table may have a structure in which the leg components are such that, in the first portion, the first and second frames are thicker or wider than the third and fourth frames, and in the second portion, the cross frame is thicker or wider than the first and second side frames.

[0032] According to the table of this aspect, in the first usage mode described above, the contact area of ​​the horizontal frame is increased, improving stability. Also, according to the table of this aspect, in the second usage mode described above, the first frame, second frame, and horizontal frame that stand upright in the height direction are thicker, improving load-bearing capacity in the height direction.

[0033] Furthermore, the above-described table may have a structure in which the leg component is provided so that the second portion is separable from the first portion, or is provided so that it can be disassembled into the first side frame, the second side frame, and the cross frame.

[0034] According to the table of this aspect, the leg portion can be made smaller in volume when disassembled compared to conventional legs, and further, the separated or disassembled second portion can be stored within the frame of the first portion in a container such as a cardboard box, thereby making it possible to make the table smaller in volume (in other words, less bulky) when not assembled or not in use, such as during transportation or storage.

[0035] In order to achieve the above object, the present invention provides a chair comprising a chair seat and legs each composed of a pair of leg components attached to the underside of the chair seat, each leg component having a first portion and a second portion, the first portion comprising a rectangular frame body composed of a first frame and a second frame that define the long sides and a third frame and a fourth frame that define the short sides and are bridged between the first and second frames, and a first connecting portion provided on any of the first to fourth frames and used to connect to the underside of the chair seat, the second portion comprising a first side frame whose tip is connected to the third frame and that forms a substantially T-shaped or L-shaped configuration in end view, The chair includes a second side frame whose tip is connected to the fourth frame and which forms an approximately T-shape or an approximately L-shape in end view, a cross frame that spans between the base ends of the first side frame and the second side frame, and a second connection portion that is provided on at least the first side frame and is used to connect to the underside of the chair seat, and the first side frame and the second side frame are shorter than the first frame and the second frame, and the chair is selectable between a first usage mode in which the first portion is connected to the underside of the chair seat, and a second usage mode in which the third frame of the first portion and the first side frame of the second portion are connected to the underside of the chair seat, resulting in a longer leg length than the first usage mode.

[0036] The chair of the present invention has legs formed with the leg structures configured as described above, and by attaching the leg structures to the chair in either the first or second usage mode, the length of the chair legs can be selected from two patterns, long and short (in other words, the leg height can be selected from two patterns, high and low), which means the height of the chair can be changed. Note that the term "chair" is used here to include not only chairs for one person, but also benches and sofas that can seat two or more people.

[0037] When the legs of the chair of the present invention are attached in the first usage mode, the length of the first and second side frames of the second part is the leg length (height). On the other hand, when the legs of the chair of the present invention are attached in the second usage mode, the length of the legs is the length of the first and second frames of the first part and the cross frame of the second part.

[0038] As mentioned above, the first and second side frames are shorter than the first and second frames, so the legs are shorter (lower) in the first usage mode than in the second usage mode. In other words, the leg length is "first usage mode (short / low) < second usage mode (long / tall)".

[0039] In other words, in this invention, a chair with legs attached in the first usage mode is a so-called "low chair," while a chair with legs attached in the second usage mode is a so-called "high chair" compared to a chair attached in the first usage mode.

[0040] Furthermore, the chair of the present invention has a robust structure that is less prone to mechanical failure than chairs with extendable legs, and when changing the height of the chair, it is only necessary to change the attachment method of the leg structure to either the first or second usage mode, eliminating the need to adjust the length (height) of each leg.

[0041] Furthermore, the above-mentioned chair may be configured in any one of the following structural modes: a first structural mode in which the first and second frames in the first section are thicker or wider than the third and fourth frames, and the cross frame in the second section is thicker or wider than the first and second side frames; a second structural mode in which the second section is separable from the first section, or is disassembled into the first, second, and cross frames; or a third structural mode in which the first and second frames in the first section are thicker or wider than the third and fourth frames, and the cross frame in the second section is thicker or wider than the first and second side frames, and the second section is separable from the first section, or is disassembled into the first, second, and cross frames.

[0042] According to the chair of this embodiment, when the leg components that make up the legs are configured according to the first structural embodiment described above, in the first usage embodiment described above, the contact area of ​​the cross frame increases, improving stability, and in the second usage embodiment described above, the first frame, second frame, and cross frame that stand upright in the height direction are thicker, improving load-bearing capacity in the height direction.

[0043] When the leg components constituting the legs of the chair of this embodiment are configured according to the second structural embodiment described above, the volume can be reduced in the disassembled state compared to conventional legs that are provided in a non-disassembly manner, and further, the separated or disassembled second part can be stored within the frame of the first part in a container such as a cardboard box, which allows the volume to be reduced (in other words, to prevent the chair from becoming bulky) when not assembled or not in use, such as during transportation or storage.

[0044] When the leg components constituting the legs of the chair of this embodiment are configured according to the third structural embodiment described above, in the first usage embodiment described above, the contact area of ​​the horizontal frame increases, improving stability, and in the second usage embodiment described above, the first frame, second frame, and horizontal frame that stand upright in the height direction are thicker, improving load-bearing capacity in the height direction, and the volume can be reduced in the disassembled state compared to conventional legs that are inseparable, and further, the separated or disassembled second part can be stored within the frame of the first part in a storage container such as a cardboard box, thereby making it possible to reduce the volume (in other words, to prevent it from becoming bulky) when not assembled or not in use, such as during transportation or storage.

[0045] Note that the aforementioned "leg structures" are "sets of at least two," so the number may be three or more, but it is preferable that the number be such that the leg structures do not interfere with each other, depending on the size of the table or chair to which they are attached. Also, it is preferable that the aforementioned "first connecting portion" and "second connecting portion" have a structure that allows them to be attached and detached directly or indirectly using a connector, and the connector may be a connecting structure that uses screws, bolts, and nuts, etc. [Effects of the Invention]

[0046] The leg structure of the present invention allows the construction of sturdy legs that are simple in structure but can be adjusted to two different lengths, long or short, for the table or chair to which it is attached. The table of the present invention also allows the legs to be sturdy in structure but can be adjusted to two different lengths, long or short. The chair of the present invention also allows the legs to be sturdy in structure but can be adjusted to two different lengths, long or short. [Brief explanation of the drawings]

[0047] [Figure 1] 1A and 1B show a table equipped with a leg structure according to the present invention, in which FIG. 1A is a planar perspective view showing a first usage mode in which the tabletop is positioned low, and FIG. 1B is a planar perspective view showing a second usage mode in which the tabletop is positioned high. [Figure 2] The leg components shown in FIG. 1 are indicated by solid lines and the tabletop is indicated by imaginary lines, with (a) being a planar perspective view showing the arrangement and configuration of the leg components in a first usage mode, and (b) being a planar perspective view showing the arrangement and configuration of the leg components in a second usage mode. [Figure 3] 2A and 2B show the exploded state of the table shown in FIG. 1 from the bottom side, with (a) being a perspective explanatory view in a first usage mode and (b) being a perspective explanatory view in a second usage mode. [Figure 4] 1 shows a chair and a sofa equipped with a leg structure according to the present invention, in which (a) is a planar perspective view of a single-seater chair in a third usage mode in which the seat is positioned low, (b) is a planar perspective view of a single-seater chair in a fourth usage mode in which the seat is positioned high, (c) is a planar perspective view of a sofa in the third usage mode in which the seat is positioned low, and (b) is a planar perspective view of a sofa in the fourth usage mode in which the seat is positioned high. [Figure 5] 1A and 1B are explanatory perspective views of a modified example of the table shown in FIG. 1 in an exploded state from the bottom side, where FIG. 1A is an explanatory perspective view of a first usage mode, and FIG. 1B is an explanatory perspective view of a second usage mode. DETAILED DESCRIPTION OF THE INVENTION

[0048] The embodiments of the present invention will be described in more detail with reference to Figures 1 to 5. The following description will be given in the order of [First Embodiment], [Second Embodiment], [Modification 1], and [Modification 2]. Furthermore, the reference numerals in each drawing are assigned within the scope of reducing complexity and facilitating understanding, and in some cases, the same reference numerals are assigned to only some of the equivalent parts.

[0049] [First embodiment] Table T will be described with reference to Figures 1 to 3. Table T is an assemblable table, and when not assembled or in use, such as for transportation or storage, its volume can be reduced compared to conventional tables. Table T comprises a table top 1 and legs 2 (see Figures 1 to 3). Each part will be described in detail below.

[0050] (Tabletop 1) The top plate 1 is made of wood, and has a plurality of connector attachment portions 111 formed on the underside 11 of the top plate, which will be the lower side after assembly (see FIGS. 2 and 3).

[0051] In a first usage mode U1 described below, the connector attachment portion 111 is formed at a position corresponding to a first connection portion 225a provided on the first portion 22 of the leg component 21, and in a second usage mode U2, it is formed at a position corresponding to a first connection portion 225b provided on the first portion 22 of the leg component 21 and a second connection portion 234 provided on the second portion 23 (see Figures 2 and 3).

[0052] The connector attachment portion 111 is a hole in which a countersunk nut is disposed (not shown), allowing a connector B, which will be described later, to be screwed in. Note that the connector attachment portion 111 is not limited to a countersunk nut, and may be a known nut member such as a long nut (tall nut) or a general nut.

[0053] (leg 2) The legs 2 are made up of wooden leg components 21. In this embodiment, a pair of leg components 21 are attached to the underside 11 of the tabletop. Each leg component 21 has a first portion 22 and a second portion 23 (see FIGS. 1 to 3).

[0054] The first portion 22 is a rectangular frame body composed of a first frame 221, a second frame 222, a third frame 223, and a fourth frame 224. The first frame 221 and the second frame 222 are disposed opposite each other and constitute the long sides of the frame body. The third frame 223 and the fourth frame 224 are bridged between the first frame 221 and the second frame 222 and constitute the short sides of the frame body. The first frame 221 and the second frame 222 are provided with a width wider than the plate thickness of the third frame 223 and the fourth frame 224 (see FIGS. 2 and 3).

[0055] First connecting portions 225a are provided near the longitudinal ends of the third frame 223 and the fourth frame 224 (four in total in this embodiment; see FIGS. 2 and 3). The first connecting portions 225a are through holes with an inner diameter that allows the threaded portion of the connector B to pass through, and a step (counterbore) that can engage the head of the connector B is provided near the edge of the hole located toward the second portion 23. The counterbore of the first connecting portion 225a is formed toward the downward side in the first usage mode of the leg component 21 (not shown).

[0056] In this embodiment, the connector B is a hexagon socket bolt whose head is formed with a larger diameter than the threaded portion, but this is not limited to this and various types of screws, bolts, etc. may also be used.

[0057] First connecting portions 225b are provided near the longitudinal ends of the third frame 223 and the fourth frame 224 (four in total in this embodiment; see FIGS. 2 and 3). The first connecting portions 225b are through-holes with an inner diameter that allows the threaded portion of the connector B to pass through, and a step (counterbore) is provided midway through the hole that allows the head of the connector B to engage (not shown). The counterbore of the first connecting portion 225b is located on the side facing inward toward the frame, and is formed toward the side that will be below the short-side frame (the third frame 223 or the fourth frame 224; see FIG. 2(b) in particular) that is attached to the underside 11 of the tabletop in the second usage mode of the leg component 21.

[0058] The second portion 23 is composed of a first side frame 231, a second side frame 232, and a horizontal frame 233. Note that the leg configuration 21 is configured such that the second portion 23 is separable from the first portion 22, and further, the second portion 23 has a structure in which the constituent parts, the first side frame 231, the second side frame 232, and the horizontal frame 233, are provided so as to be disassembled.

[0059] The first side frame 231 has a front end connected to the third frame 223, forming a T-shape in end view. The second side frame 232 has a front end connected to the fourth frame 224, forming a T-shape in end view. The first side frame 231 and the second side frame 232 are shorter than the first frame 221 and the second frame 222 of the first portion 22.

[0060] The horizontal frame 233 spans between the base ends of the first side frame 231 and the second side frame 232. The horizontal frame 233 is provided with a width greater than the thickness of the first side frame 231 and the second side frame 232.

[0061] Second connecting portions 234 are provided near the longitudinal center of the first side frame 231 and the second side frame 232 (two in total in this embodiment). The second connecting portion 234 is a through-hole with an inner diameter that allows the threaded portion of the connector B to pass through, and a step (counterbore) is provided midway through the hole that can engage the head of the connector B (not shown). The counterbore of the second connecting portion 234 is located on the side facing inward toward the frame, and is formed toward the side that will be below the side frame (first side frame 231 or second side frame 232; see FIG. 2(b) in particular) that is attached to the underside 11 of the tabletop in the second usage mode of the leg configuration 21.

[0062] (effect) The effects of the table T of this embodiment will be described with reference to FIGS.

[0063] <Before assembly> As a result of the above-described configuration of table T, firstly, the table top 1 and legs 2 can be disassembled, and the leg constituent body 21 that constitutes the leg 2 can be disassembled into a first section 22 and a second section 23, and further, the second section 23 can be disassembled into a first side frame 231, a second side frame 232, and a cross frame 233. As a result, when not assembled or not in use, such as during transportation or storage, the table can be disassembled and stored in a container (for example, a cardboard box), making it possible to reduce the volume (in other words, to reduce the bulk) compared to conventional wooden tables.

[0064] Then, the separated or disassembled components of second part 23 can be stored within the frame of first part 22 in a container such as a cardboard box. This makes it possible to further reduce the volume (in other words, to further reduce the bulk) when not assembled or in use, such as during transportation or storage.

[0065] Furthermore, compared to conventional wooden tables, Table T can fit more tables (before assembly) in the same space. This "space" includes not only storage facilities such as warehouses but also loading spaces such as truck compartments. By being able to load tables (in their containers) in the loading space of trucks and other transportation means in a less bulky state than before, the transportation cost per product can be reduced.

[0066] <Assembly> First, the disassembled second section 23 is assembled by attaching the first side frame 231 and the second side frame 232 to the horizontal frame 233 using connectors (not shown) such as bolts and (recessed) nuts.

[0067] Next, the second portion 23 is attached to the first portion 22 to assemble one leg component 21. During assembly, the tip of the first side frame 231 is connected to the longitudinal center of the third frame 223 so as to form a T-shape in end view. Similarly, the tip of the second side frame 232 is connected to the longitudinal center of the fourth frame 224 so as to form a T-shape in end view. The other leg components 21 are assembled in the same manner. Note that these connections are also made re-disassembleable using connectors (not shown) such as bolts and (recessed) nuts (both not shown). Through the above steps, the required number of leg components 21 are prepared.

[0068] In addition, when assembling the second part 23 or attaching the second part 23 to the first part 22, in addition to connecting devices such as bolts and nuts, known connecting means such as a mortise joint made by combining a tenon and a mortise hole, or a dowel joint made by combining a dowel and a dowel hole can also be used.

[0069] Finally, the two leg structures 21 are attached via a plurality of connector attachment portions 111 formed on the underside 11 of the tabletop 1 (see FIG. 3). At this time, assembly is performed by selecting either a first usage mode U1 in which the first portion 22 is connected to the underside 11 of the tabletop, or a second usage mode U2 in which the third frame 223 of the first portion 22 and the first side frame 231 of the second portion 23 are connected to the underside 11 of the tabletop.

[0070] Assembly for achieving the first usage mode U1 will be described in detail. In the first usage mode U1, the first portion 22 of the leg component 21 is placed against the underside 11 of the tabletop, and the hole in the connector attachment portion 111 on the underside 11 of the tabletop and the hole in the first connecting portion 225a of the first portion 22 are overlapped so that they communicate with each other. Connectors B are inserted into each of the communicating holes (a total of four per leg component 2 in this embodiment) and tightened until the heads of the connectors contact the counterbore. This connects the first portion 22 to the underside 11 of the tabletop, and the leg component 21 is attached to the tabletop 1, forming the leg 2 according to the first usage mode U1 (see FIGS. 2(a) and 3(a)).

[0071] Assembly for the second usage mode U2 will be described in detail. In the second usage mode U2, the third frame 223 of the first portion 22 of the leg component 21 and the first side frame 231 of the second portion 23 are placed against the underside 11 of the tabletop, and the holes in the connector attachment portion 111 of the underside 11 of the tabletop are overlapped so that they communicate with the holes in the first connecting portion 225b of the first portion 22 and the holes in the second connecting portion 234 of the first side frame 231 of the second portion 23. Connectors B are inserted into each of the communicating holes (a total of three per leg component 2 in this embodiment) and tightened until the heads of the connectors contact the counterbore. This connects the third frame 223 of the first portion 22 and the first side frame 231 of the second portion 23 to the underside 11 of the tabletop, and the leg component 21 is attached to the tabletop 1, thereby forming a leg 2 according to the second usage mode U2 (see FIGS. 2(b) and 3(b)).

[0072] <After assembly> By attaching the leg structure 21 to the table T in either the first usage mode U1 or the second usage mode U2, the length of the legs 2 of the table T can be selected from two patterns, long and short (in other words, the leg height can be selected from two patterns, high and low), which means that the height of the table T can be changed.

[0073] When the leg constituent 21 of the table T is attached in the first usage configuration U1, the length of the first side frame 231 and the second side frame 232 of the second portion 23 becomes the length (height) of the leg 2. On the other hand, when the leg constituent 21 of the table T is attached in the second usage configuration U2, the length of the first frame 221 and the second frame 222 of the first portion 22 and the length of the horizontal frame 233 of the second portion 23 becomes the length (height) of the leg 2.

[0074] The first side frame 231 and the second side frame 232 are shorter than the first frame 221 and the second frame 222, so the length of the legs 2 is shorter (lower) in the first usage mode U1 than in the second usage mode U2. That is, the length of the legs 2 is "first usage mode U1 (short / low) < second usage mode U2 (long / tall)".

[0075] In other words, the table T whose legs 2 are in the first usage mode U1 is a so-called "low table" that is used in combination with a leg chair or the like. On the other hand, the table T whose legs 2 are in the second usage mode U2 is a so-called "high table" that is used in combination with a dining chair or the like.

[0076] Furthermore, table T has a robust structure that is less susceptible to mechanical failure compared to tables with extendable legs, and when changing the height of table T, it is only necessary to change the mounting method of leg structure 21 to either the first usage mode U1 or the second usage mode U2, eliminating the need to adjust the length (height) of each leg.

[0077] Furthermore, in the first usage mode U1, the table T has wider horizontal frames 233 of its legs 2, which increases the contact area, thereby improving stability (see FIGS. 1 and 2). Furthermore, in the second usage mode U2, the table T has thicker first frames 221, second frames 222, and horizontal frames 233, which stand upright in the height direction, thereby improving its load-bearing capacity in the height direction (see FIGS. 1 and 2). Furthermore, in the second usage mode U2, the table T has a larger contact area with the floor F than in the first usage mode U1. Therefore, the table T has better stability in the second usage mode U2, where the center of gravity is higher.

[0078] In addition, the table T has a top board 1 and legs 2 made of wood, so the overall wooden texture is impressive and well-organized.

[0079] Second Embodiment The chair C1 will be described with reference to Figures 4(a) and (b). The chair C1 is an assembly-type chair, and when not assembled or not in use, such as during transportation or storage, its volume can be reduced compared to conventional chairs. The chair C1 comprises a chair seat 3 and legs 4 (see Figures 4(a) and (b)). Each part will be described in detail below, and a description of the structure and effects common to the table T according to the first embodiment will be omitted.

[0080] (Chair seat 3) The chair seat 3 has a cushioned backrest (reference numeral omitted) and seat surface, and a plurality of connector attachment portions (not shown) are formed on the underside 31 of the chair seat, which will be on the lower side after assembly. In a first usage mode U3 described below, the connector attachment portions are formed at positions corresponding to a first connection portion 425a provided on the first portion 22 of the leg component 41, and in a second usage mode U4, they are formed at positions corresponding to a first connection portion 425b provided on the first portion 42 of the leg component 41 and a second connection portion (reference numeral omitted) provided on the first side frame 431 of the second portion 23. The connector attachment portions of the chair seat 3 have the same structure and function as the connector attachment portion 111, and so a description thereof will be omitted.

[0081] (leg 4) The legs 4 are made up of wooden leg components 41. In this embodiment, a pair of leg components 41 are attached to the underside 31 of the chair seat. Each leg component 41 has a first portion 42 and a second portion 43.

[0082] The first portion 42 is a rectangular frame body composed of a first frame 421 and a second frame 422 that form the long sides, and a third frame 423 and a fourth frame 424 that form the short sides. The first frame 421 and the second frame 422 are provided with a width wider than the plate thickness of the third frame 423 and the fourth frame 424.

[0083] First connecting portions 425a are provided near the longitudinal ends of the third frame 423 and the fourth frame 424 (four in total in this embodiment). The first connecting portions 425a have the same structure and function as the first connecting portion 225a according to the first embodiment, and therefore their description will be omitted. Furthermore, the connector B used in this embodiment is the same as that used in the first embodiment, and therefore its description will be omitted.

[0084] First connecting portions 425b (four in total in this embodiment) are provided near the longitudinal ends of the third frame 423 and the fourth frame 424. The first connecting portions 425b have the same structure and effects as the first connecting portion 225b according to the first embodiment, and therefore a description thereof will be omitted.

[0085] The second portion 43 is composed of a first side frame 431, a second side frame 432, and a horizontal frame 433. Note that the leg structure 41 is configured such that the second portion 43 is separable from the first portion 42, and further, the second portion 43 has a structure in which the constituent parts, the first side frame 431, the second side frame 432, and the horizontal frame 433, are provided so as to be disassembled.

[0086] The first side frame 431 has a front end connected to the third frame 423, forming a T-shape in end view. The second side frame 432 has a front end connected to the fourth frame 424, forming a T-shape in end view. The first side frame 431 and the second side frame 432 are shorter than the first frame 421 and the second frame 422 of the first section 42. The horizontal frame 433 spans between the base ends of the first side frame 431 and the second side frame 432. The horizontal frame 433 is wider than the plate thickness of the first side frame 431 and the second side frame 432.

[0087] Second connection portions (reference numeral omitted) (two in total in this embodiment) are provided near the longitudinal center of the first side frame 431 and the second side frame 432. The second connection portions have the same structure and function as the second connection portion 234 according to the first embodiment, and therefore a description thereof will be omitted.

[0088] (effect) 4(a) and 4(b), the effects of the chair C1 of this embodiment will be described. The chair C1 is a single-seater chair.

[0089] <Before assembly> As a result of the above-described configuration of chair C1, firstly, the chair seat 3 and the leg 4 can be disassembled, and the leg constituent body 41 constituting the leg 4 can be disassembled into a first part 42 and a second part 43, and further, the second part 43 can be disassembled into a first side frame 431, a second side frame 432, and a cross frame 433. As a result, when not assembled or not in use, such as during transportation, the chair can be disassembled and stored in a container such as a box, and the volume can be made smaller (less bulky) than conventional chairs.

[0090] Then, the separated or disassembled components of second part 23 can be stored within the frame of first part 22 in a container such as a cardboard box. This makes it possible to further reduce the volume (in other words, to further reduce the bulk) when not assembled or in use, such as during transportation or storage.

[0091] Furthermore, compared to conventional chairs, more chairs (before assembly) can be stored in the same space with the chair C1. The chairs (in their containers) can be loaded in a less bulky state than conventional chairs in the loading space of a transportation means such as a truck, thereby reducing the transportation cost per product.

[0092] <Assembly> As with the second part 23 according to the first embodiment, first, the first side frame 431 and the second side frame 432 are attached to the cross frame 433 using connectors (not shown), and the second part 43 in a disassembled state is assembled.

[0093] Next, the second portion 43 is attached to the first portion 42 to assemble one leg portion 41. During assembly, the tip of the first side frame 431 is connected to the longitudinal center of the third frame 423 so as to form a T-shape in end view. Similarly, the tip of the second side frame 432 is connected to the longitudinal center of the fourth frame 424 so as to form a T-shape in end view. The other leg portions 41 are assembled in the same manner. Note that the assembly of the second portion 43 or the attachment of the second portion 43 to the first portion 42 is also performed using connectors such as bolts and nuts. Through the above steps, the required number of leg portions 41 are prepared.

[0094] Finally, the two leg components 41 are attached via a plurality of connector attachment portions (not shown) formed on the underside 31 of the chair seat. At this time, assembly is performed by selecting either the first usage mode U3 in which the first portion 42 is connected to the underside 31 of the chair seat, or the second usage mode U4 in which the third frame 423 of the first portion 42 and the first side frame 431 of the second portion 43 are connected to the underside 31 of the chair seat.

[0095] Assembly for achieving the first usage mode U3 will be described in detail. In the first usage mode U3, the first portion 42 of the leg component 41 is placed against the underside 31 of the chair seat, and the holes in the connector attachment portions of the underside 31 of the chair seat are overlapped so that they communicate with the holes in the first connecting portion 425a of the first portion 42. Connectors B are inserted into each of the communicating holes (a total of four per leg component 4 in this embodiment) and tightened until the heads contact the counterbore. This connects the first portion 42 to the underside 31 of the chair seat, and the leg component 41 is attached to the chair seat 3, forming the leg 4 relating to the first usage mode U3 (see FIG. 4(a)).

[0096] Assembly for achieving the second usage mode U4 will be described in detail. In the second usage mode U4, the third frame 423 of the first part 42 of the leg component 41 and the first side frame 431 of the second part 43 are placed against the underside 31 of the chair seat, and the holes in the connector attachment portion of the underside 31 of the chair seat are overlapped so that they communicate with the holes in the first connecting portion 425b of the first part 42 and the holes in the second connecting portion of the first side frame 431 of the second part 43. Connectors B are inserted into each of the communicating holes (a total of three per leg component 4 in this embodiment) and tightened until the heads of the connectors contact the counterbore. As a result, the third frame 423 of the first part 42 and the first side frame 431 of the second part 43 are connected to the underside 31 of the chair seat, and the leg component 41 is attached to the chair seat 3, thereby forming a leg 4 according to the second usage mode U4 (see FIG. 4(b)).

[0097] <After assembly> By attaching the leg structure 41 to the chair C1 in either the first usage mode U3 or the second usage mode U4, the length of the legs 4 of the chair C1 can be selected from two patterns, long and short (in other words, the leg height can be selected from two patterns, high and low), which means that the height of the chair C1 can be changed.

[0098] When the leg component 41 of the chair C1 is attached in the first usage configuration U3, the length of the first side frame 431 and the second side frame 432 of the second portion 43 becomes the length (height) of the leg 4. On the other hand, when the leg component 41 of the chair C1 is attached in the second usage configuration U4, the length of the leg 4 becomes the length (height) of the first frame 421 and the second frame 422 of the first portion 42 and the length of the cross frame 433 of the second portion 43.

[0099] Because the first side frame 431 and the second side frame 432 are shorter than the first frame 421 and the second frame 422, the legs are shorter (lower) in the first usage mode U3 than in the second usage mode U4. That is, the length of the legs 4 is "first usage mode U3 (short / low) < second usage mode U4 (long / tall)". In other words, chair C1 whose legs 4 are in the first usage mode U3 is a so-called "low chair," while chair C1 whose legs 4 are in the second usage mode U4 is a so-called "high chair" compared to chair C1 in the first usage mode U3.

[0100] Furthermore, chair C1 has a robust structure that is less susceptible to mechanical failure compared to chairs with extendable legs, and when changing the height of chair C1, it is only necessary to change the attachment method of leg structure 41 to either first usage mode U3 or second usage mode U4, eliminating the need to adjust the length (height) of each leg.

[0101] Furthermore, in the first usage mode U3, the chair C1 has wider horizontal frames 433 of its legs 4, increasing the contact area, thereby improving stability (see FIG. 4(a)). Furthermore, in the second usage mode U4, the chair C1 has thicker first frames 421, second frames 422, and horizontal frames 433, which stand upright in the height direction, improving its load-bearing capacity in the height direction (see FIG. 4(b)). Furthermore, in the second usage mode U4, the chair C1 has a larger contact area with the floor F than in the first usage mode U3. Therefore, the chair C1 has better stability in the second usage mode U4, where the center of gravity is higher.

[0102] In addition, the table T has a top board 1 and legs 2 made of wood, so the overall wooden texture is impressive and well-organized.

[0103] [Variation 1] Chair C2 will be described with reference to Figures 4(c) and (d). Chair C2 has a chair seat that is a sofa and can be assembled, and when not in use or when not assembled, such as during transportation, it can be folded up into a smaller volume compared to conventional chairs (sofas). Chair C2 is similar to chair C1 in that it includes chair seat 3 and legs 4 (see Figures 4(c) and (d)), and a description of the structure and effects common to chair C1 according to the second embodiment will be omitted.

[0104] (Chair seat 3) In chair C2, the chair seat 3 is a sofa, and so the width and depth are set larger than those of chair C1. Therefore, as will be described later, in order to attach more leg structures 41 than chair C1, more connector attachment portions are provided than chair C1 (not shown).

[0105] (leg 4) The legs 4 are made up of wooden leg components 41, and in variant 1, a total of four leg components 41 are attached as a set, two on each side, to the underside 31 of the chair seat. Note that although the dimensions and length of each part of the leg components 41 differ from those of the leg components 41 related to chair C1, the basic configuration is the same, so explanation will be omitted.

[0106] (effect) The effects of chair C2 will be described with reference to Figures 4(c) and (d). Chair C2 is a chair (sofa) for 2 to 3 people. Note that the "before assembly" stage of the process is the same as that of chair C1, so a description thereof will be omitted.

[0107] <Assembly> As with the chair C1 according to the second embodiment, first, the disassembled second section 43 is assembled. Next, the second section 43 is attached to the first section 42 to assemble one leg section 41, and the required number of leg sections 41 are prepared. Finally, the four leg sections 41 are attached via a plurality of connector attachment sections (not shown) formed on the underside 31 of the chair seat.

[0108] At this time, as with chair C1, assembly is performed by selecting either the first usage configuration U3 in which the first section 42 is connected to the underside 31 of the chair seat, or the second usage configuration U4 in which the third frame 423 of the first section 42 and the first side frame 431 of the second section 43 are connected to the underside 31 of the chair seat. Note that the assembly for the first usage configuration U3 and the assembly for the second usage configuration U4 are the same as those for chair C1, and therefore will not be described here.

[0109] <After assembly> By attaching the leg structure 41 of chair C2 in either the first usage mode U3 or the second usage mode U4, the length of the legs 4 of chair C2 can be selected from two patterns, long and short (in other words, the leg height can be selected from two patterns, high and low), which means that the height of chair C2 can be changed (see Figures 4(c)(cd)).

[0110] For chair C2, when the leg components 41 are attached in the first usage configuration U3, the length of the first side frame 431 and the second side frame 432 of the second section 43 becomes the length (height) of the leg 4. On the other hand, for chair C2, when the leg components 41 are attached in the second usage configuration U4, the length (height) of the leg 4 becomes the length of the first frame 421 and the second frame 422 of the first section 42 and the length of the cross frame 433 of the second section 43. As a result, similar to chair C1, the length of the leg 4 is "first usage configuration U3 (short / low) < second usage configuration U4 (long / tall)", and therefore chair C2 whose legs 4 are in the first usage configuration U3 becomes a so-called "low sofa," while chair C2 whose legs 4 are in the second usage configuration U4 becomes a so-called "high sofa" compared to chair C2 in the first usage configuration U3.

[0111] Chair C2 also has a robust structure that is less susceptible to mechanical failure compared to chairs with extendable legs, and to change the height of chair C2, it is only necessary to change the attachment method of leg structure 41 to either the first usage mode U3 or the second usage mode U4, eliminating the need to adjust the length (height) of each leg.

[0112] Furthermore, in the first usage mode U3, chair C2 has wider horizontal frames 433 of its legs 4, increasing the contact area, thereby improving stability (see FIG. 4(c)). Furthermore, in the second usage mode U4, chair C2 has thicker first frames 421, second frames 422, and horizontal frames 433 that stand upright in the height direction, improving its load-bearing capacity in the height direction (see FIG. 4(d)). Furthermore, in the second usage mode U4, chair C2 has a larger contact area with the floor F than in the first usage mode U3. Therefore, chair C2 has better stability in the second usage mode U4, where the center of gravity is higher.

[0113] [Variation 2] A modified example (modified example 2) of the table T of the first embodiment will be described with reference to Fig. 5. The table T of modified example 2 includes a table top 1 and legs 2. Since the table top 1 is the same as that of the table T of the first embodiment, a description of the structure and effects thereof will be omitted. Furthermore, a description of the structure and effects of the other components of the table T of modified example 2 that are the same as those of the table T of the first embodiment will be omitted.

[0114] (leg 2) The legs 2 are made up of wooden leg components 21b. In Modification 2, two leg components 21b are attached to the underside 11 of the tabletop in pairs. Each leg component 21b has a first portion 22 and a second portion 23b (see FIG. 5). Note that the first portion 22 of the leg component 21b is the same as the first portion 22 of the leg component 21 according to the first embodiment, and therefore a description of the structure and effects will be omitted.

[0115] Similar to the second part 23 of the first embodiment, the second part 23b is composed of a first side frame 231, a second side frame 232, and a horizontal frame 233, and is provided so as to be separable from the first part 22, and is also provided so as to be disassembled into the first side frame 231, the second side frame 232, and the horizontal frame 233 of which the second part 23b is a component. A second connecting part 234 is provided near the middle in the longitudinal direction of the first side frame 231 and the second side frame 232. Note that the second connecting part 234 of the second part 23b is the same as the second connecting part 234 of the second part 23 of the first embodiment, and therefore a description of the structure, operation, and effect will be omitted.

[0116] The first side frame 231 has a tip connected to the third frame 223 near the first frame 221, and is generally L-shaped in end view. The second side frame 232 has a tip connected to the fourth frame 224 near the first frame 221, and is generally L-shaped in end view. The first side frame 231 and the second side frame 232 are shorter than the first frame 221 and the second frame 222 of the first section 22. The cross frame 233 spans between the base ends of the first side frame 231 and the second side frame 232, and is wider than the plate thicknesses of the first side frame 231 and the second side frame 232.

[0117] The effects of the table T of the second modification will be described with reference to FIG. <Before assembly> In the table T according to the second modification, similarly to the table T of the first embodiment, the table top 1 and the legs 2, the first portion 22 and the second portion 23b of the leg constituent body 21b, and the first side frame 231, the second side frame 232, and the cross frame 233 of the second portion 23b are all disassembled, and the separated or disassembled components of the second portion 23b can be stored within the frame of the first portion 22 in a storage container such as a box. As a result, the table T according to the second modification can also be disassembled and stored in a storage container when not assembled, such as during transportation, and can be made smaller in volume (less bulky) than conventional wooden tables, and more tables in storage containers can be loaded onto a transportation means such as a truck, which contributes to reducing the transportation cost per product.

[0118] <Assembly> First, the second part 23b in a disassembled state is assembled by attaching the first side frame 231 and the second side frame 232 to the horizontal frame 233 using connectors (not shown).

[0119] Next, the second portion 23b is attached to the first portion 22 to assemble one leg component 21. During assembly, the tip of the first side frame 231 is connected to the vicinity of the end of the first frame 221 in the longitudinal direction of the third frame 223 so as to form a roughly L-shape in end view. Similarly, during assembly, the tip of the second side frame 232 is connected to the vicinity of the end of the first frame 221 in the longitudinal direction of the fourth frame 224 so as to form a roughly L-shape in end view. The other leg components 21b are assembled in the same manner. Note that this connection is also made re-disassemblable by the connector. Through the above steps, the required number of leg components 21b are prepared.

[0120] Finally, the two leg components 21b are attached to the underside 11 of the tabletop 1. At this time, assembly is performed by selecting either the first usage mode U1 in which the first portion 22 is connected to the tabletop 1, or the second usage mode U2 in which the third frame 223 of the first portion 22 and the first side frame 231 of the second portion 23b are connected to the tabletop 1.

[0121] In the first usage mode U1, the leg constituent 21b is oriented so that the short side of the tabletop 1 and the horizontal frame 233 of the second portion 23b are parallel, the first portion 22 is placed against the underside 11 of the tabletop, and the holes in the connector attachment portions 111 on the underside 11 of the tabletop and the holes in the first connecting portions 225a of the first portion 22 are overlapped so that they communicate with each other, and connectors B are inserted into each of the communicating holes and tightened until the heads contact the counterbore. This connects the first portion 22 to the underside 11 of the tabletop, and the leg constituent 21b is attached to the tabletop 1, forming the leg 2 according to the first usage mode U1 (see FIG. 5(a)).

[0122] In the second usage mode U2, the third frame 223 of the first part 22 of the leg constituent 21b and the first side frame 231 of the second part 23b are placed against the underside 11 of the tabletop, and the holes in the connector attachment parts 111 on the underside 11 of the tabletop are overlapped so as to communicate with the holes in the first connecting part 225b of the first part 22 and the second connecting part 234 of the first side frame 231 of the second part 23b, and connectors B are inserted into each of the communicating holes and tightened until the heads hit the counterbore. This connects the third frame 223 of the first part 22 and the first side frame 231 of the second part 23b to the underside 11 of the tabletop, and the leg constituent 21 is attached to the tabletop 1, thereby forming a leg 2 according to the second usage mode U2 (see FIG. 5(b)).

[0123] <After assembly> In the table T according to the second modification, by mounting the leg structure 21b in either the first usage mode U1 or the second usage mode U2, the length of the legs 2 of the table T can be selected from two patterns, long and short (in other words, the leg height can be selected from two patterns, high and low), and thus the height of the table T can be changed.

[0124] In the table T according to Modification 2, when the leg constituents 21b are attached in the first usage configuration U1, the length of the first side frame 231 and the second side frame 232 of the second portion 23b becomes the length (height) of the legs 2, and the table becomes a "low table" in which the legs 2 are shorter than in the second usage configuration U2. Furthermore, because the second portion 23b is substantially L-shaped in end view, when attached to the table top 1 in the first usage configuration U1, the spacing between the leg constituents can be made wider compared to the table T of the first embodiment, which is substantially T-shaped, and it is possible to prevent the leg constituents from hitting the legs of the user and getting in the way.

[0125] On the other hand, in the table T according to Modification 2, if the leg components 21b are attached in the second usage configuration U2, the lengths of the first frame 221 and second frame 222 of the first portion 22 and the horizontal frame 233 of the second portion 23b become the length (height) of the legs 2, and the table becomes a "high table" with longer legs 2 than in the first usage configuration U1. Then, the leg components 21b are arranged asymmetrically (in other words, the second portions 23b are arranged alternately), and legs 2 with a unique appearance can be configured.

[0126] Like the table T of the first embodiment, the table T of the second modification has a robust structure that is less susceptible to mechanical failure, and changing the height of the table T requires only changing the attachment method of the leg structure 21b to either the first usage mode U1 or the second usage mode U2, eliminating the need to adjust the length (height) of each leg. Also, with regard to the table T of the second modification, in the first usage mode U1, the wide horizontal frame 233 increases the ground contact area, thereby improving stability, and in the second usage mode U2, the upright first frame 221, second frame 222, and horizontal frame 233 are thick, improving load-bearing capacity in the height direction and providing good stability.

[0127] The terms and expressions used in this specification and the claims are merely descriptive and not limiting, and are not intended to exclude terms and expressions equivalent to the features described in this specification and the claims, or portions thereof. It goes without saying that various modifications are possible within the scope of the technical idea of ​​the present invention. Furthermore, the terms "first," "second," etc., do not imply rank or importance, but are used to distinguish one element from another. [Explanation of symbols]

[0128] T-table 1 baking sheet 11 Underside of the top plate 111 Connector attachment part 2 legs 21, 21b Leg structure 22 Part 1 221 1st slot 222 2nd slot 223 3rd slot 224 4th slot 225a First connection part 225b First connection part 23, 23b 2nd part 231 First side frame 232 Second side frame 233 Horizontal Frame 234 Second Connection U1 First usage mode U2 Second usage mode C1, C2 chairs 3 Chair seat 31 Underside of chair seat 4 legs 41 Leg structure 42 Part 1 421 1st slot 422 2nd slot 423 3rd slot 424 4th slot 425a First connection part 425b First connection part 43 Part 2 431 First side frame 432 Second side frame 433 Horizontal Frame 434 Second Connection U3 First usage mode U4 Second usage mode B Connector F floor

Claims

1. At least two of these are attached to a table or chair as a set to form legs, a first portion having a rectangular frame body composed of first and second frames which are long sides, and third and fourth frames which are short sides spanning between the first and second frames, and a first connection portion provided on any of the first to fourth frames and used for connection to the underside of a table top or a chair seat; a second portion including a first side frame having a tip connected to the third frame and forming a substantially T-shape or a substantially L-shape in end view, a second side frame having a tip connected to the fourth frame and forming a substantially T-shape or a substantially L-shape in end view, a horizontal frame spanning base ends of the first side frame and the second side frame, and a second connection portion provided on at least the first side frame and used for connection to the underside of a table top or an underside of a chair seat, wherein the first side frame and the second side frame are shorter than the first frame and the second frame; Equipped with leg structure.

2. In the first portion, the first frame and the second frame are provided to be thicker or wider than the third frame and the fourth frame, In the second portion, the horizontal frame is thicker or wider than the first side frame and the second side frame.

2. The leg construction of claim 1.

3. The second part is provided so as to be separable from the first part, or is provided so as to be disassembled from the first side frame, the second side frame, and the cross frame.

2. The leg construction of claim 1.

4. The second part is provided so as to be separable from the first part, or is provided so as to be disassembled from the first side frame, the second side frame, and the cross frame.

3. The leg construction of claim 2.

5. A tabletop and a leg portion formed of at least two leg structures attached to the underside of the tabletop as a set, each of the leg components has a first portion and a second portion, the first portion including a rectangular frame body constituted by first and second frames which are long sides and third and fourth frames which are short sides spanning between the first and second frames, and a first connection portion which is provided on any of the first to fourth frames and used for connection to the underside of the tabletop, the second portion including a first side frame whose tip is connected to the third frame and which forms a substantially T-shape or a substantially L-shape in end view, a second side frame whose tip is connected to the fourth frame and which forms a substantially T-shape or a substantially L-shape in end view, a horizontal frame which spans between base ends of the first and second side frames, and a second connection portion which is provided on at least the first side frame and which is used for connection to the underside of the tabletop, the first side frame and the second side frame being shorter than the first frame and the second frame, A first usage mode in which the first portion is connected to the underside of the tabletop, or a second usage mode in which the third frame of the first portion and the first side frame of the second portion are connected to the underside of the tabletop, and the leg length is longer than in the first usage mode, is selectable. table.

6. The leg structure is In the first portion, the first frame and the second frame are provided to be thicker or wider than the third frame and the fourth frame, In the second portion, the horizontal frame is thicker or wider than the first side frame and the second side frame.

6. The table of claim 5.

7. The leg structure has a structure in which the second portion is provided so as to be separable from the first portion, or is provided so as to be disassembled from the first side frame, the second side frame, and the cross frame.

6. The table of claim 5.

8. The second part is provided so as to be separable from the first part, or is provided so as to be disassembled from the first side frame, the second side frame, and the cross frame.

7. The table of claim 6.

9. A chair seat and a leg portion formed by at least two leg structures attached to the underside of the chair seat in a set, each of the leg components has a first portion and a second portion, the first portion including a rectangular frame body constituted by first and second frames which are long sides and third and fourth frames which are short sides which bridge between the first and second frames, and a first connecting portion which is provided on any of the first to fourth frames and used for connection to the underside of the chair seat, the second portion including a first side frame whose tip is connected to the third frame and which forms a substantially T-shape or a substantially L-shape in end view, a second side frame whose tip is connected to the fourth frame and which forms a substantially T-shape or a substantially L-shape in end view, a cross frame which bridges between base ends of the first and second side frames, and a second connecting portion which is provided on at least the first side frame and which is used for connection to the underside of the chair seat, the first side frame and the second side frame being shorter than the first frame and the second frame, A first usage mode in which the first portion is connected to the underside of the chair seat, or a second usage mode in which the third frame of the first portion and the first side frame of the second portion are connected to the underside of the chair seat, and the leg length is longer than in the first usage mode, is selectable. chair.

10. The leg structure is A first structural mode in which the first frame and the second frame in the first portion are thicker or wider than the third frame and the fourth frame, and the horizontal frame in the second portion is thicker or wider than the first side frame and the second side frame; A second structural mode in which the second part is provided separably from the first part, or is provided disassembleably to the first side frame, the second side frame, and the cross frame; or a third structural mode in which the first frame and the second frame in the first portion are thicker or wider than the third frame and the fourth frame, and the horizontal frame in the second portion is thicker or wider than the first side frame and the second side frame, and the second portion is either provided separably from the first portion or is provided disassembleably to the first side frame, the second side frame, and the horizontal frame; It is composed of either 10. The chair of claim 9.

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