JP2005143762A - Leg body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leg body with high attaching strength of leg blades to a leg pole, applicable as the leg body for supporting a top of a table or a backrest and seat of a chair, permitting highly flexible change of the number of leg blades and the opening angle. <P>SOLUTION: The leg body 1 consists of the leg pole 2, a plurality of leg blades 3, core members 4 attached to the lower end of the leg pole 2 for supporting the plurality of leg blades 3, and a fixing member 5 for fixing the plurality of leg blades 3 to the core members 4. A supported part 31 to be supported to the core members 4 and the fixing member 5 is formed in common at the base ends of the leg blades 3, and a supporting part 413 for supporting the leg blades 3 together with the fixing member 5 is formed in each core member 4 corresponding to the supported part 31 in an arbitrary leg blade 3. Accordingly, the leg blades 3 in the number corresponding to any one core member 4 attached to the leg pole 2 are fixed at a prescribed opening angle with the common fixing member 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a leg body applied to furniture such as a table and a chair.

2. Description of the Related Art Conventionally, various leg bodies composed of a pedestal and a plurality of leg blades provided at the lower end thereof are known as leg portions of a top board, a chair, and the like. In this type of leg body, a plurality of leg blades are integrated at the base end portion and attached to the lower end portion of the pedestal, or the base end portions of individual predetermined number of leg wings are gathered at the lower end portion of the pedestal column. Some of them are attached (see, for example, Patent Document 1). As an example of the latter, the leg described in this document is applied to the leg of the table. Specifically, at the lower end of the square pillar-shaped pedestal, a total of four leg blades are hooked on the four standing walls of the pedestal from below, and ring-shaped engagement members are further attached from below. A long bolt that is simultaneously engaged with the leg blades and passed through the inside of the pedestal from the top plate holder is tightened together with the engaging member with a nut.
JP 2000-245537 A

  However, in the leg body having such a configuration, the number of leg feathers to be attached to the pedestal and the opening angle between the leg feathers are determined in advance. Changes such as changing the opening angle or expanding or narrowing the leg space below the top board cannot be made. In addition, the bolts that fix the leg blades to the pedestal are extremely long from the lower end of the pedestal to the top plate holder, so there is a risk of buckling, twisting or bending, and the leg wings loosen and function as a leg There is also a possibility that it will not be fulfilled.

  Therefore, in view of the above problems, the present invention can be applied as a leg body that supports a top plate in a table, a back seat portion in a chair, etc., and the shape of the support and the lower limb space to be secured The number of leg blades and the opening angle can be changed with a high degree of freedom in accordance with the size of the leg blades, and the like.

  That is, the leg body of the present invention is attached to a pedestal, a plurality of leg blades arranged in a radial manner by gathering base ends around the pedestal and grounded to the floor, and a lower end of the pedestal. A core member that supports a plurality of leg blades and a fixing member that fixes the plurality of leg blades to the core member, and each leg blade is supported at the base end by the core member and the fixing member. The core member is provided with one core member selected from a plurality of core members corresponding to the number of attached leg blades and the opening angle between the leg blades, Each of these core members has a support portion that supports the leg blades together with the fixing member corresponding to the supported portion of any leg blade, and the core member is attached to any one of the core members attached to the pedestal. Corresponding number of leg feathers at a common opening angle It is characterized in that it is configured to secure a constant member.

  If it is a leg of such a configuration, if leg blades having a base end portion of a common configuration are used, the core member can be selected and used according to the number of leg blades and the opening angle between the leg blades. Corresponding to the conditions such as the size and shape of the table top and the back seat of the chair, it is possible to form an appropriate leg by using a member other than the core member in common. In terms of surface reduction, it is possible to provide an unprecedented superior leg.

  In such a leg, members other than the core member can be shared as described above, but it is preferable that the support structure for the leg blades is also shared for the core member. For this purpose, each core member may be provided with a common core body having a support portion for supporting the leg blades and a fixing member arrangement portion for arranging the fixing member.

  Further, in order to make the fixing member simple, the fixing member may be provided with a bolt and a nut for fixing the leg blades to the core member, and the core member can be simplified corresponding to the fixing member. In order to achieve this, a cylindrical portion that allows a shaft portion of a bolt to be inserted into the core body as a fixing member arrangement portion and that either the nut or the head of the bolt to be placed on the upper end side and the other to be placed on the lower end side is provided. It is desirable to form. Moreover, since it is sufficient if the length of the axial part of a volt | bolt is made a little longer than a core member by comprising in this way, it arises when using the long volt | bolt beyond the height dimension of a pedestal like the past. Such problems as buckling, twisting, and bending do not occur.

  Furthermore, while effectively utilizing the cylindrical portion formed in such a core member, the mounting structure between the leg blades and the core member is simplified, the manufacturing process is simplified, and the assembly work is simplified. At the base end of the leg blade, an upper protrusion that protrudes upward as a supported portion is formed, and on the core body, an attachment portion for attaching to the lower end portion of the pedestal is formed on the upper end portion of the cylindrical portion, A fitting recess for inserting the upper protrusion as a support portion may be formed between the attachment portion and the cylindrical portion.

  Regardless of whether or not the cylindrical member is formed on the core member, each of the leg members and the core member can be simplified in the same manner in order to simplify the manufacturing process and the assembly work. An upper protrusion protruding upward as a supported part may be formed at the base end part of the leg blade, and a fitting recess for inserting the upper protrusion as the support part may be formed in the core body.

  Furthermore, in order to improve the mounting strength of the leg blades to the core member using the fixing member while simplifying the mounting structure of the leg blades and the fixing member, the base end of each leg blade is covered with While forming a lower protrusion that protrudes downward as a support part, the fixing member has a fitting recess that is disposed on the lower end side of the core body and allows the lower protrusion to be inserted from above. It is preferable to provide a leg blade receiving member that contacts either one.

  Also, in order to make the number of leg blades that can be attached to each core member different from the opening angle between the leg blades, the number of leg blades that can be attached to the core member and the opening angle between the leg blades are set. It is desirable to form a defining part to be defined. A form suitable as such a defining portion includes a core member formed with a spacer portion interposed between leg blades arranged in the support portion. Then, in order to integrate such a core member with the pedestal in appearance and improve the appearance, it is preferable to form an outer surface substantially flush with the outer peripheral surface of the pedestal in the spacer portion.

  The core member for supporting the largest number of leg blades may not be provided with the defining portion.

  Further, when the pedestal is a pipe-shaped member, in order to stabilize the posture of the pedestal and the core member by partially fitting the core member with the pedestal, It is preferable to form a posture stabilizing portion that protrudes upward so as to be in contact with the inner wall of the pedestal.

  Furthermore, if the legs are as described above, the core member is supported in accordance with various conditions such as the upper structure of the top plate and the back seat part to be supported and the width of the leg space. A plurality of types of leg blades having the same part and height dimensions and different longitudinal dimensions can be attached at the same time, and variations of the leg blades and leg bodies can be made abundant.

  According to the leg according to the present invention, with the supported portion for the pedestal at the base end of the leg blade as a common configuration, a core member corresponding to the desired number of leg blades and the opening angle between the leg blades is selected. When used, the leg blades can be attached to the core member by a common fixing member. For this reason, a leg body corresponding to various conditions such as the size and shape of the top board of the table supported by the leg body, the back seat portion of the chair, etc., or the size of the necessary leg space is constructed with a high degree of freedom. In this case, since members other than the core member can be used in common, the cost can be reduced. Furthermore, the leg of the present invention can be constructed even if the longitudinal dimension is different as long as the configuration and height of the base end portion are common between the leg blades applied to the same leg body. And it is possible to make the variation of the whole leg body rich.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  This embodiment is a leg 1 shown in FIGS. 1 and 7, both of which support the top plates TT1 (FIG. 1) and TT2 (FIG. 7) and support the tables T1 (FIG. 1) and T2 (FIG. 7). It constitutes. In the example shown in the figure, a large round ceiling having a substantially elliptical shape in plan view on the table T2 is formed by a single leg 1 at the lower surface side central portion of a small rectangular top plate TT1 having a generally rectangular shape in plan view on the table T1. Both end portions of the plate TT2 are supported by one leg 1 directly or via an appropriate top plate receiving member with the lower surface side center portion of the plate TT2 interposed therebetween. The leg 1 basically includes a single pedestal 2 extending in the vertical direction and a plurality of leg wings 3 in which the base ends are assembled at the lower end of the pedestal 2. In order to provide four leg blades 3 and to provide two leg blades 3 on the table T2, each is partially configured between the lower end portion of the pedestal 2 and the base end portion of the leg blades 3. 4A (applied to the table T1, which does not appear in appearance because it is hidden behind the leg blade 3 in FIG. 1, see FIGS. 2 to 6) and 4B (applied to the table T2) are provided. In addition, when naming these core members 4A and 4B generically, suppose that the code | symbol 4 is used for convenience of explanation. Further, each leg blade 3 is attached to the core member 5 using a common fixing member 5 in any leg body 1 (however, in the leg body 1 shown in FIG. 1, the fixing member 5 is also attached to the leg blade 3. (See Fig. 3 because it is hidden and does not appear in appearance). Further, as shown in FIG. 1, there are basically two types of leg blades 3 which are different only in the longitudinal dimension from the base end portion to the tip end portion. Although indicated by 3 (S), for convenience of explanation, reference numeral 3 is used when referring to these leg blades 3 (L) and 3 (S). In the table T2, two longer leg blades 3 (L) are used for each leg 1 each. Further, the casters 3C are provided at the tip portions of the leg blades 3, but adjusters and other grounding members may be provided in place of the casters 3C.

  First, as shown in FIGS. 1 and 7, the pedestal 2 is applied in common to the tables T1 and T2. In this embodiment, a round pipe material having a predetermined outer diameter and inner diameter is required. The top plates TT1 and TT2 that are appropriately cut according to the height are used.

  Next, the leg blade 3 is an elongated member having a longitudinal direction from a base end portion disposed on the lower end side of the pedestal 2 to a distal end portion to which a grounding member such as a caster 3C is attached. These leg blades 3 are obtained by integral molding such as aluminum die casting. As shown in FIGS. 2, 3, 8, and 9, as a configuration common to each leg blade 3, a supported portion 31 for supporting the core member 4 and the fixing member 5 at the base end portion. Is forming. 2 and FIG. 7 show a state in which the leg pillar 2 is broken at an arbitrary height and viewed from below, and the core member 4 and the leg blade 3 are removed by omitting the support pillar 2 and the fixing member 5. Represents. The supported portion 31 is formed in a block shape by increasing the thickness of the base end portion when the leg blade 3 is manufactured, and is formed so as to form a fan shape in plan view smaller than the inner diameter of the pedestal 2. . Such a fan-shaped shape of the supported portion 31 in a plan view forms an inner angle of approximately 90 ° with the center line of the pedestal 2 as the center, and the base end surface 31a extending in the vertical direction has a similar fan shape in a plan view. It is curved. The supported portion 31 has an upper protrusion 32 (shown with shading in FIGS. 2 and 7) that protrudes upward and protrudes downward while maintaining the fan-shaped plan view shape as described above. The lower protrusion 33 is formed.

  Next, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6 (above, about the table T1) and FIG. 8, FIG. 9, FIG. 10, FIG. A description will be given with reference to T2. First, the core member 4 is a member formed integrally with each part by, for example, aluminum die casting or the like. As a common configuration to each core member 4A and the core member 4B, a support part that supports the leg blades 3 together with the fixing member 5 is provided. And a core main body 41 having a function as a fixing member arrangement portion for arranging the fixing member 5. Specifically, the core body 41 includes a cylindrical portion 411 having a round pipe shape whose center matches the center line inside the pedestal 2 so as to function as the fixing member arrangement portion, and an upper end of the cylindrical portion 411. The main part is an attachment portion 412 for fitting by being fitted into the pedestal 2 on the side. The mounting portion 412 is a ring-shaped member sharing the center with the cylindrical portion 411, and its outer dimension is substantially matched with the inner diameter dimension of the pedestal 2, and the inner diameter dimension is larger than the outer diameter dimension of the cylindrical portion 411. doing. And the annular fitting recessed part 413 formed between the outer wall of the cylindrical part 411 and the inner wall of the attaching part 412 is made to function as the said support part. Further, a ring-shaped flange portion 412 a having an outer peripheral surface substantially flush with the outer peripheral surface of the pedestal 2 is formed at the lower end portion of the mounting portion 412, and the mounting portion 412 is formed in the pedestal 2 from below. When inserted, the lower end of the pedestal 2 is placed on the flange 412a. And in order to stabilize the attitude | position of the leg pillar 2 and the core main body 41 which were fitted in this way, the outer surface was made to protrude upwards as a partial circular arc shape corresponding to the inner wall of the leg pillar 2 on the upper surface of the attachment part 412. A pair of posture stabilizing portions 414 having a standing wall shape are formed at opposite positions so that the outer surface of the posture stabilizing portion 414 and the inner wall of the pedestal 2 can be brought into contact with each other. The tubular portion 411 and the attachment portion 412 are connected by a total of four ribs 415 protruding outward at substantially 90 ° intervals at the upper end portion of the tubular portion 411.

  Here, as shown by shading in FIG. 2, in the leg 1 applied to the table T1, four leg blades 3 are provided at an opening angle of 90 ° to each other, and adjacent leg blades are provided. Since the standing side walls 31b of the supported portion 31 at the base end portion 3 are brought into contact with each other, the number of attachments to the core member 4A and their opening angle (90 °) are defined by the four leg blades 31 themselves. Is done. Therefore, the core member 4 </ b> A is configured only by the core body 41.

  On the other hand, as shown by shading in FIG. 8, in the leg body 1 applied to the table T2, since the two leg blades are provided at an opening angle of 120 °, the configuration of the core member 4B Therefore, it is necessary to define the number of leg blades 3 to be attached (two) and the opening angle (120 °) thereof. Therefore, the core member 4B is provided with a defining portion 42 for defining the number of leg blades 3 to be attached and their mutual opening angles. More specifically, the defining portion 42 includes wall-like spacer portions 42B1 and 42B2 that are formed so as to be integrally hung from the lower end of the mounting portion 412 in the core body 41 so as not to obstruct the fitting recess 413. The That is, these spacer portions 42B1 and 42B2 are formed so as to form a sector shape in plan view as shown by hatching (broken lines) in FIG. 8, and the outer surface thereof is the outer surface of the flange portion 412b of the mounting portion 412. The spacers 42B1 and 42B2 are configured to be substantially flush with the outer peripheral surface of the leg column 2 so that the side surfaces of the spacer portions 42B1 and 42B2 are in contact with the standing side surface 31b at the base end portion of the leg blade 3. Therefore, among the angles formed by the leg blades 3, the central angle of the spacer portion 42B1 interposed on the inner angle side is set to about 30 °, and the central angle of the spacer portion 42B2 interposed on the outer angle side is set to about 150 °. It is. Each of the spacer portions 42B1 and 42B2 is connected to the outer peripheral surface of the cylindrical portion 411 by one or two ribs 43, respectively.

  The fixing member 5 for fixing the leg blade 3 to the core member 4 as described above is applicable to each core member 4 in common. In this embodiment, as shown in FIGS. 3 and 9, the core member 4 has a leg blade receiving member 51 that can simultaneously support a plurality of leg blades 3 from below, and a leg blade that supports the leg blades 3. The receiving member 51 includes a bolt 52 and a nut 53 for fastening the receiving member 51 to the core member 4 together. The leg blade receiving member 51 is a member having a flat donut shape in which a through hole 51a for inserting the shaft portion of the bolt 52 is formed in the center portion. On the upper surface side of the leg blade receiving member 51, an annular groove-type fitting recess 51b opened upward so as to surround the through hole 51a is formed, and the base end of each leg blade 3 is formed in the fitting recess 51b. The lower protrusion 33 in the supported portion 31 is inserted and fitted. On the other hand, a recess 51c that accommodates the head of the bolt 52 is formed on the lower surface side so as to open downward. Then, the bolt 52 is inserted from below through the recess 51c, and the shaft portion of the bolt 52 is passed through the through hole 51a of the leg blade receiving portion 51 and the cylindrical portion 511 of the core member 4, and the tip of the shaft portion. The portion (upper end portion) projects upward from the core member 4 and is tightened with a nut 53. The nut 53 is a so-called plate nut having a substantially rectangular plate shape fixed to the inner wall of the pedestal 2 by welding or the like. The pair of four posture stabilizing portions 414 and 414 are inserted, and by doing so, the horizontal rotation of the core member 4 with respect to the pedestal 2 is suppressed. When the bolt 52 and the nut 53 are tightened in this state, the plurality of leg blades 3 are rigidly connected by the core member 4 and the fixing member 5, and the core member 4 is rigidly connected to the column 2.

  In the present embodiment, in addition to the above, by using the core member 4 in which the arrangement of the defining portion 42 is changed, the leg body 1 in which the number of leg blades 3 and their opening angles are changed can be configured. . Some of them are shown in FIG. 13 following FIGS. 2 and 8 described above. The leg 1 shown in FIG. 2A is provided with two leg blades 3 with an opening angle of 90 °. For this purpose, the core member 4C is provided with a defining portion 42 including a spacer portion 42C having a central angle of about 180 °. Further, the leg body 1 shown in FIG. 2B has two leg blades 3 provided at an opening angle of 180 °. For this purpose, the core member 4D is provided with a defining portion 42 including two spacer portions 42D having a central angle of about 90 °. Furthermore, the leg 1 shown in FIG. 2C is provided with three leg blades 3 with an opening angle of 120 °. For this purpose, the core member 4D is provided with a defining portion 42 including three spacer portions 42E having a central angle of about 30 °.

  As described above, when the leg body 1 according to the present embodiment is attached to the core member 4 by using the fixing member 5 to attach the plurality of leg blades 3 in which the base ends are assembled around the pedestal 2, The blade 3 has the same configuration as the supported portion 31 at the base end and the fixing member 5 and uses the core member 4 corresponding to the desired number of leg blades 3 and the opening angle between the leg blades 3. It is composed. Therefore, it is possible to form an appropriate leg body 1 each time according to conditions such as the difference in shape and weight of the top plates TT1 and TT2 of the tables T1 and T2, the width of the lower limb space to be secured, etc. In this way, by making the members other than the core member 4 common, it is possible to reduce the manufacturing cost.

  Moreover, since the core member 4 has in common the core main body which has the support part which supports the leg blade 3 with the fixing member 5, and the fixing member arrangement | positioning part which arrange | positions the fixing member 5, it is partially a core. The structure of the member 4 can be shared.

  Furthermore, since the fixing member 5 includes the bolt 52 and the nut 53, the configuration and the assembly are simple. Further, the core member 4 is connected to the core body 41 in correspondence with the fixing member 5 described above. Since the shaft portion of the bolt 52 is inserted as an arrangement portion, the nut 53 is placed on the upper end side, and the cylindrical portion 411 configured to position the head of the bolt 52 on the lower end side is provided. The total length of the bolt 52 may be slightly longer than the height of the core member 4 at the most while simplifying the basic structure of the bolt 52, so that the bolt 52 as the fixing member 5 may be buckled, twisted, bent, or the like. Problems can also be avoided.

  Further, the core body 41 is configured by the above-described cylindrical portion 411 and the mounting portion 412 disposed at the upper end portion thereof, and the fitting recess 413 formed between the cylindrical portion 411 mounting portion 412 Since the upper protrusion 32 formed as the supported portion 31 is inserted into the base end portion of the leg blade 3, the core main body 41, the leg blade 3, Assembling state can be made good and strong. And the fitting recessed part 51b is formed in the leg blade receiving member 51 applied from the downward direction of the leg blade 3 as the fixing member 5, and the lower protrusion 33 formed as a supported part of the leg blade 3 in this fitting recessed part 51b. Since the bolts 52 and the nuts 53 are fastened together as described above, the leg blades 3 can be attached to the core member 4 very firmly.

  The core member 4 is provided with a defining portion 42 that defines the number of leg blades 3 that can be respectively attached and the opening angle between the leg blades 3. The defining portion 42 is interposed between the leg blades 3. Since the spacer portions 42 </ b> B to 42 </ b> E are formed, the number of leg blades 3 that can be attached to each core member 4 and the opening angle between the leg blades 3 can be easily realized. Furthermore, since the outer surfaces of the spacer portions 42B to 42E are substantially flush with the outer peripheral surface of the pedestal 2, the core member 4 and the pedestal 2 can be integrated in appearance. In addition, in this embodiment, when using the four leg blades 3 which are the most attachment number with respect to the core member 4, the number and opening angle (90 degrees) are prescribed | regulated by the relationship between adjacent leg blades 3. FIG. Therefore, it is not necessary to provide the defining portion 42 in the core member 4A, and the core member 4A can be formed only by the core body 41.

  Further, since the posture stabilizing portion 414 that is formed on the upper end portion of the core member 4 and protrudes upward is brought into contact with the inner wall of the pedestal 2, the core member 4 fits closely with the pedestal 2. The stabilization of the posture and attachment state of the pedestal 2 and the core member 4 can be easily achieved.

  Moreover, since the leg body 1 of this embodiment is the above structures, it is also possible to attach several types of leg blades 3 (L) and 3 (S) having different longitudinal dimensions to the same core member 4. Variations in the shape of the leg blades 3 and the leg 1 can be made extremely rich.

  In addition to the core members described above, it is possible to arrange the leg blades at an appropriate opening angle in the range of 1 to 4 depending on how the spacer portion is provided. In addition, by changing the size of the base end portion of the leg blades 3, five or more leg blades can be attached to one core member, or the opening angles of three or more adjacent leg blades are uneven. It is also possible to make it. In addition, the leg blades can be applied to leg blades having appropriate longitudinal dimensions as well as those having two kinds of long and short longitudinal dimensions. Furthermore, the specific configuration of each part such as the shape and size of the constituent members of the leg body, the material, and the type of the upper structure of the furniture supported by the leg body are not limited to the above embodiment, and the present invention. Various modifications can be made without departing from the spirit of the present invention.

The perspective view which shows the table to which the leg which uses one core member in one Embodiment of this invention is applied. The schematic plan view which shows the principal part of the same leg. The schematic longitudinal cross-sectional view which fractures | ruptures and shows the principal part of the leg body by the AA line in FIG. The perspective view which shows the same core member. The front view. FIG. 6 is an end view showing the core member by cutting along the Aa-Aa line, Ab-Ab line, and Ac-Ac line in FIG. 5. The perspective view which shows the table to which the leg which uses another core member in the embodiment is applied. The schematic plan view which shows the principal part of the same leg. The schematic longitudinal cross-sectional view which fractures | ruptures and shows the principal part of the same leg body by the BB line in FIG. The perspective view which shows the same core member. The front view. FIG. 12 is an end view showing the core member by cutting along the Ba-Ba line, Bb-Bb line, and Bc-Bc line in FIG. 11. The conceptual top view which shows the state which applied the other core member in the same embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Leg 2 ... Leg pillar 3 ... Leg blade 4 ... Core member 5 ... Fixing member 31 ... Mounted part 32 ... Upper protrusion 33 ... Lower protrusion 41 ... Core main body 42 ... Regulation | regulation part 42B1, 42B2, 42C, 42D 42E ... Spacer part 51 ... Leg blade receiving member 52 ... Bolt 53 ... Nut 411 ... Fixed member arrangement part (tubular part)
412: Mounting portion 413: Support portion (fitting recess)
414 ... Posture stabilizing part 51b ... Fitting recess

Claims (12)

A pedestal, a plurality of leg blades that are arranged in a radial manner with the base ends centered around the pedestal and are grounded to the floor, and a plurality of leg wings that are attached to the lower end of the pedestal and support the plurality of leg wings Comprising a core member and a fixing member for fixing the plurality of leg blades to the core member;
Each leg blade includes a supported portion supported by the core member and the fixing member at the base end portion in common, and the core member has an attachment number of the leg blades and an opening angle between the leg blades. One core member selected from a plurality of corresponding core members is applied, and each of these core members supports the leg blades together with the fixed member corresponding to the supported portion of any leg blade. A support portion that is configured to fix the corresponding number of leg blades to any one of the core members attached to the pedestal by a common fixing member at a predetermined opening angle. Legs characterized by being. The leg body according to claim 1, wherein each of the core members includes a common core body having the support portion and a fixing member arrangement portion for arranging the fixing member. The fixing member includes a bolt and a nut for fixing the leg blades to the core member, and the core body allows the shaft portion of the bolt to be inserted as a fixing member arrangement portion, and the nut or bolt on the upper end side. The leg according to claim 2, wherein a cylindrical part is formed in which one of the heads of the other can be disposed on the lower end side. An upper protrusion protruding upward as the supported portion is formed at the base end portion of each leg blade, and an attachment portion for attaching to the lower end portion of the pedestal column at the upper end portion of the cylindrical portion is formed on the core body. The leg according to claim 3, wherein a fitting concave portion is formed between the attachment portion and the cylindrical portion so as to insert the upper protrusion as the support portion. An upper protrusion protruding upward as the supported part is formed at the base end part of each leg blade, and a fitting recess for inserting the upper protrusion as the support part is formed in the core body. The leg according to claim 1, 2 or 3. A lower protrusion that protrudes downward as the supported part is formed at the base end of each leg blade, and the fixing member is disposed on the lower end side of the core body and the lower protrusion is inserted from above The leg body according to claim 4, further comprising a leg blade receiving member having a fitting recess to be brought into contact with either one of the head of the bolt or the nut. The leg body according to claim 1, 2, 3, 4, 5 or 6, wherein the core member is formed with a defining portion that defines the number of leg blades that can be attached and an opening angle between the leg blades. The leg body according to claim 7, wherein a spacer part interposed between leg blades arranged in a support part is formed in the core member as the defining part. The leg body according to claim 7 or 8, wherein the spacer portion has an outer surface substantially flush with an outer peripheral surface of the pedestal. The leg body according to claim 7, 8 or 9, wherein the defining portion is not formed on a core member capable of supporting the largest number of leg blades among the plurality of core members. At the upper end portion of the core member, a posture stabilizing portion is formed so as to protrude upward so as to be in contact with the inner wall of the pipe-shaped pedestal. The leg according to 7, 8, 9 or 10. A plurality of types of leg blades having the same supported portion and a height dimension and different longitudinal dimensions can be simultaneously attached to the core member. , 9, 10 or 11.

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