JP4188046B2 - Lifting legs - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lifting leg for adjusting the height of a desk or table top, a seat surface of a chair, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, various furniture having leg portions such as desks, tables, chairs, and the like, which are provided with elevating legs on the leg portions in order to adjust the height of the top plate and the seating surface, are known. As such an elevating / lowering leg, for example, a two-layer structure of a support column provided on the lower end side and a support column provided on the upper end side and supporting the top plate or the like can be projected and submerged on the surface of the support column. While a fixed pin is provided, a plurality of insertion holes are intermittently formed in the column cover in the vertical direction, and when the column is moved up and down in the column cover, the column fixing pin matches one of the insertion holes in the column cover. The thing which changed the substantial height dimension of the leg part in steps by projecting in the position and engaging with the insertion hole is mentioned (patent document 1). In addition, as the lifting legs of other configurations, the leg portion is composed of a column cover and a column, and a spacer is provided between the column cover and the column, and the column is appropriately disposed with respect to the column cover. When the tip of the fixing screw inserted from the side to the support cover is pressed against the spacer, the support spacer is pressed against the outer wall of the support column to fix the support column at that height position. Thus, the thing which changed the substantial height dimension of the leg part can be mentioned (patent document 2).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-10050 (FIG. 1)
[Patent Document 2]
Japanese Patent Laid-Open No. 2000-83743 (FIG. 3)
[0004]
[Problems to be solved by the invention]
However, since all the conventional lifting legs having such a configuration are basically configured to fix the column cover and the column with pins or screws, the column cover is supported by the column load and the column. All the loads of the furniture main body such as the board and the seat, and the load of the user seated on the object placed on the top board and the seat are all received, and a very large shearing force acts on the support column cover. For this reason, when an aluminum die-cast product or a synthetic resin product is applied as the support column cover, there is a possibility that the strength may be insufficient. On the other hand, measures such as increasing the thickness of the strut cover can be considered to easily increase the strength of the strut cover, but if such a configuration is easily adopted, the weight of the member and the cost will increase. Will be invited.
[0005]
Therefore, in view of the above problems, the present invention mainly aims to provide an elevating leg that can change the height of the column without applying a shearing force to the column cover.
[0006]
[Means for Solving the Problems]
That is, the lifting leg of the present invention is applied to the leg portion that supports the furniture body, and moves the furniture body up and down in the vertical direction, and has a leg base mainly composed of a base body arranged on the floor. A hollow column cover disposed in an upright position on the leg base, and a column that is inserted from above so as to be vertically movable in a hollow portion extending in the vertical direction of the column cover and supports the furniture body from below. The base body is provided with a core material inserted from below into the hollow portion of the column cover in an upright position, and a plurality of parts obtained by moving the column in either the vertical direction in the hollow portion of the column cover. it is assumed that constitute the selected from the height position of any one height strut at a position so as to fixedly engaged with the core material.
[0007]
In the case of such a lifting leg, the column supporting the furniture body is fixed to the core material at any height position, not to the column cover, and the core material is directly attached to the base body. Since it is supported, no load of the column and furniture body acts on the column cover. Therefore, even if the support column cover is made of a thin member, there is no lack of support strength. In addition, since the core material is not exposed to the outside because it is inserted in the hollow portion of the support column cover, the material and appearance of the support column cover are not affected by the support strength for the support column as in the past. It can be selected relatively freely. Such lifting legs are suitable for various furniture such as desks and tables with the furniture body as a top plate or a top plate holder, chairs with the furniture body as a seat, and the height of the furniture body is suitable. Can be adjusted.
[0008]
The present invention , which can realize this lifting leg with a simple configuration, forms a plurality of engagement holes at predetermined intervals along the height direction in the column, respectively, at the same height position of the column cover and the core material. In addition to forming a through hole and fixing a nut corresponding to the through hole formed in the core material, a fixing bolt inserted into the through hole from the outside of the column cover is attached to any of the columns. The shaft portion of the fixing bolt is engaged only with the engagement hole by being inserted into the engagement hole and the through hole of the core member and then tightened to the nut .
[0009]
In this case, in particular, in order not to apply the load of the column and furniture body to the column cover at all, the diameter of the through hole formed in the column cover should be larger than the head of the fixing bolt. That's fine.
[0010]
Further, the support column is a hollow member having a substantially equal cross-sectional shape along the longitudinal direction, and the core member has a substantially equal cross-sectional shape different from the support column along the longitudinal direction and is inserted into the hollow interior of the support column In order to obtain a stable fixed state when the column is fixed to the core using bolts and nuts, the bolts and nuts are fastened to the portions where the through holes are formed in the core. It is sometimes preferable to provide a spacer that is in close contact with a portion of the inner surface of the column. By doing so, the spacer is pressed against the inner surface of the support column when the bolt is tightened to the nut, so that they can be firmly fixed without causing any wobbling of the support column and the core material.
[0011]
Furthermore, in order to realize a stable vertical movement in the column cover of the column, it is preferable to provide the column with a slider interposed in a gap between the outer surface of the column and the inner surface of the hollow part of the column cover. In this case, the slider is disposed at the lower end portion of the support column, and an upper movement restricting portion is formed at the upper end portion of the support column cover so as to contact the slider of the support column and restrict the upward movement of the support column. Since the strut moved to the position cannot move above the position where the slider abuts on the upward movement restricting portion, it is possible to provide a suitable stopper.
[0012]
In addition, in order to improve the stability of the column cover with respect to the leg base, a protrusion projecting upward is formed on the upper surface of the base body, and the core material is disposed in an upright position on the protrusion, and the protrusion The column cover may be fixed to the leg base in a state where the column is inserted into the hollow portion of the column cover from below.
[0013]
And this invention which can raise stability of the whole raising / lowering leg, and can obtain the stable raising / lowering operation | movement of a support | pillar and a furniture main body, this raising / lowering leg, the said support | pillar cover which has a pair of hollow part, and these paired hollow part It comprises at least a leg base provided with a pair of core members respectively inserted into a pair and a pair of struts, and is configured to engage the corresponding core members and struts in each hollow portion. Yes . In particular, if the upper ends of a pair of columns are both fixed to the furniture body and the columns are configured to move up and down synchronously, the furniture body supported by the columns can be moved up and down smoothly without rattling. Can do.
[0014]
And according to the lifting legs as described above, even if the support cover is made of aluminum die cast product or synthetic resin product, and the support cover that is thin and light as much as possible is used, the support cover has the support post and furniture. The main object of the present invention can be satisfactorily achieved without applying a load on the main body and without worrying about strength.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
This embodiment shown in FIGS. 1, 2, and 3 is an elevating leg B that is applied to a desk D and elevates and lowers a top board A that is a furniture body. The top plate A is connected to the top plate main body A1, a pair of top plate receivers A2 supported by the lifting legs B to support the side ends of the top plate main body A1, and the top plate receivers A2 connected to each other. It is comprised from the support rod A3 which supports the depth direction center part over the width direction. In addition, the top-plate main body A1 and the support rod A3 are shown with the imaginary line in FIGS.
[0017]
The elevating leg B mainly includes a leg base 1 that is grounded to the floor surface, a core 2 and a hollow column cover 3 that are arranged in a standing posture on the upper surface 12a of the leg base 1, and a hollow portion 2S of the column cover 3. The support column 4 is arranged so as to be movable up and down and supports the top plate receiver A2 from below. The leg base 1, the core member 2, the column cover 3, and the column 4 are integrated to form the lifting leg X. Hereinafter, the structure of each part in this raising / lowering leg B is demonstrated concretely.
[0018]
As shown in FIGS. 1 to 3, the leg base 1 includes a long base body 10 extending in the depth direction below the side end of the top plate body A <b> 1 and an adjuster 1 </ b> B that contacts the floor surface. Is. As shown in FIGS. 4, 5 and 6, the base body 10 is formed by integrally forming a peripheral wall 11 and an upper wall 12 by, for example, aluminum die casting, and has a hollow shape with the back side opened downward. In addition, the peripheral wall 11 and the upper wall 12 are reinforced by a large number of ribs 13 provided vertically and horizontally in the cavity. The upper wall 12 is gently inclined so that the upper surface 12a becomes lower at both ends with respect to the central portion in the longitudinal direction. The peripheral wall 11 is formed so as to hang around the periphery of the upper wall. Then, a substantially horizontal recess 14 in a plan view is formed in the center of the upper wall 12 in the longitudinal direction, and a pair of protrusions 15 projecting upward are formed at both ends in the longitudinal direction of the recess 14. is doing. The protrusion 15 has a substantially circular ring shape in plan view, and a core material holding hole 15a for holding the core material 2 is formed at the center thereof. Note that the core material holding hole 15a has a substantially rectangular shape in plan view with long sides set in the longitudinal direction of the base body 10, and the two long sides bulge outward in the center at a partial arc shape. It has a shape. Further, the projecting portion 15 is formed with a tap hole 15b for fixing the core material 2 so as to cross the central portion of the partial arc shape on the long side of the core material holding hole 15a. In addition, between the central portion in the longitudinal direction of the recess 14 and the protrusions 15, two through-holes 16 arranged in the width direction for fixing the column cover 3 are located at positions slightly closer to the protrusions 15. The wall 12 is formed so as to penetrate the wall thickness. These through holes 16 are continuous with downward projections (not shown) that also function as the ribs 13 on the back side of the base body 10 </ b> A, and are also opened on the back side of the base body 10. A tap hole 17 for attaching an adjuster 18 as a grounding member is formed at both ends in the longitudinal direction on the back side, and a screw portion 18a provided at the upper end of the adjuster 18 is tightened into the tap hole 17 from below. However, instead of the adjuster 18, a caster having a similar threaded portion can be attached as a grounding member.
[0019]
As shown in FIGS. 4, 6, 7, and 8, the two core members 2 are members having the same shape, and the side wall is formed by bending a sheet material made of a sheet metal material to form a U-shape in plan view. 21, a front wall 22 and a rear wall 23 are formed. The core material 2 corresponds to the long side inside the core material holding hole 15a in the protrusion 15 formed in the concave portion 14 of the base body 10, and the front wall 22 and the rear wall 23 are short in the front and rear. The lower end portion is inserted into the core material holding hole 15a so as to correspond to the sides. A through hole 24 through which the tapping bolt TB1 can be inserted is formed in the lower end portion of the side wall 21 so as to correspond to the tap hole 15b formed in the protruding portion 15 in a state where the lower end portion is inserted into the concave portion 14. A through hole 25 is also formed at a position slightly below the upper end of the side wall 21, and a nut 26 is attached to the surface of the through hole 25 on the side where the front wall 22 and the rear wall 23 face each other by welding. ing. Further, a plate-like spacer 27 is attached to the side wall 21 on the surface opposite to the side on which the nut is provided. The spacer 27 is formed in a partial arc shape whose surface abuts on the inner surface of the support column 4 to be described later, and a through hole 27 a communicating with the through hole 25 is formed in the center in the height direction. Further, a hook-shaped hook 27b bent backward and downward is attached to the upper end portion of the spacer 27 on the back surface side facing the side wall 21 of the core member, and the hook 27b is hooked on the upper edge of the side wall 21. I have to. Further, a protrusion 27c protruding rearward is formed at a position below the through hole 25 of the 27a, and the protrusion 27c is placed at a position slightly below the through hole 25 of the side wall 21 with the hook 27b hooked on the side wall 21. The spacer 27 is stabilized by being inserted into the small hole 28 formed in the above. In addition, the longitudinal dimension of this core material 2 is about 386.5 mm, for example.
[0020]
As shown in FIGS. 1 to 8, the support cover 3 is a hollow member that is inserted into the recess 14 of the base body 10, and has an outer wall 31 that is substantially oval in plan view, and both longitudinal ends of the outer wall 31. It is comprised from a pair of inner wall 32 which forms the hollow part 33 which comprises cross-sectional view substantially circle shape and continues over the upper and lower sides. That is, inside the both end portions of the outer wall 31, a cylinder that surrounds the hollow portion 33 with each inner wall 32 is formed. In this embodiment, this support | pillar cover 3 is comprised with the aluminum die-cast product, By forming the cavity 34 enclosed by these inner walls 32 and the outer walls 31 between the inner walls 23, and continuing up and down. Each part has a substantially uniform thickness. In addition, the thickness of the support | pillar cover 3 in this embodiment is about 2 mm as an example. The diameter of the hollow portion 33 is a size that fits with the outer periphery of the protrusion 15 of the base body 10. That is, the column cover 3 is arranged in an upright posture in which the corresponding core members 2 are inserted into the two hollow portions 33 and the protrusions 15 are inserted into the hollow portions 33. In addition, on the surface on the cavity 34 side of both inner walls 32, continuous grooves having two partial arcs for each inner wall 32 so as to communicate with the two front and rear through holes 16 formed in the base body 10. 35 is formed over the top and bottom. Then, with the column cover 3 standing in the recess 14 of the base body 10, the tapping bolt TB 2 is inserted into the through hole 16 from the downward projection on the back surface side of the base body 10, and further tightened in the continuous groove 35. The support cover 3 is fixed to the base body 10. Further, on the inner surface of the outer wall 31, through holes 37 communicating with both the hollow portions 33 are formed at height positions corresponding to the through holes 25 formed in the upper end portion of the core member 2. The through-hole 37 is for allowing the fixing bolt 5 to pass when the column 4 is fixed to the core member 2 at an appropriate height position by the fixing bolt 5. Therefore, the diameter of the through hole 37 is set slightly larger than the maximum diameter of the head 51 of the fixing bolt 5. Further, a small continuous groove 36 having a smaller partial arc shape is formed between the continuous grooves 35 of both inner walls 32 so as to extend vertically. This is used to fix the upper slider 38 and the cover 39, which will be described in (1).
[0021]
The upper slider 38 is a substantially cylindrical member having an outer diameter substantially equal to the inner diameter of the hollow portion 33 and an inner diameter substantially equal to the outer diameter of the support column 4 to be described later, and has an upper and lower slit 38b and an upper end. In the portion, a collar portion 38a having a size corresponding to a cylindrical shape formed by the inner wall 32 and the outer wall 31 is provided. Such an upper slider 38 is inserted into each hollow portion 33 from above, and is disposed in a state where the flange portion 38a is placed on the upper surface of the column cover 3 so as not to fall. In this embodiment, the upper slider 38 is an integrally molded product of synthetic resin in order to make the vertical movement of the column 4 with respect to the column cover 3 smooth. On the other hand, the cover 39 is a thin synthetic resin product having substantially the same shape as the outer periphery of the upper surface of the outer wall 31 of the column cover 3, and a pair of front and rear circular holes so as to open the hollow portion 33 upward through the upper slider 38. It has a spectacle-like planar view shape forming 39a. Inside these circular holes 39a, through holes 39b through which the screws 39c can be inserted are formed so as to penetrate through the wall thickness of the cover 39 so as to communicate with the small continuous grooves 36 of the column cover 3. Then, after the support column 4 is inserted into the hollow portion 33, the upper slider 38 is inserted into the hollow portion 33, and the cover 39 is disposed from above the screw 39 c inserted into the through hole 39 b. The upper slider 38 and the cover 39 are attached to the column cover 3 by being fastened to the small continuous groove 36.
[0022]
As shown in FIGS. 4 to 8, the support column 4 is mainly made of a metal circular pipe material having a thickness smaller than the inner diameter of the hollow portion 33 of the support column cover 3 and capable of inserting the core material 2 therein. The two struts 4 have the same shape. Note that. In this embodiment, the longitudinal dimension of the support column 4 is about 500 mm, for example. On the surface of the support column 4, a plurality of engagement holes 41 having a thickness penetrating are aligned in the vertical direction at a predetermined interval. In the present embodiment, the number of the engagement holes 41 is five as an example, and the interval is 25 mm. However, this is not necessarily limited to this, and can be changed as appropriate. Further, an attachment hole 42 for fixing the screw 44 when the lower slider 43 is attached is formed at the lower end portion of the support cover 3. The lower slider 43 is for making the vertical movement in the hollow portion 33 of the support column 4 stable and smooth like the upper slider 38, and a synthetic resin product is applied in this embodiment. Specifically, the lower slider 43 is a C-ring-like member in plan view having an inner diameter that is substantially the same as the outer diameter of the support column 4 and an outer diameter that is substantially the same as the inner diameter of the hollow portion 33, and is formed on the side surface. The screws 44 inserted through the through holes 43 a are fastened to the mounting holes 42, whereby the lower ends of the screws 44 are fixed to the support columns 4 at positions substantially coincident with the lower ends of the support columns 4. Further, a fixing plate 45 for fixing the top plate receiver A2 is attached to the upper end portion of the support column 4 by welding so as to conceal the hollow interior from above. An attachment hole 45a for fixing and supporting the top plate receiver A2 with the tapping bolt TB3 is opened at the center of the fixing plate 45 in the vertical direction.
[0023]
Here, the top plate A of the desk D to which the present embodiment is applied will be briefly described. As shown in FIGS. 1 to 3, the top plate body A <b> 1 is a rectangular plate material having a predetermined thickness. The top plate receiver A2 is a long member formed by, for example, aluminum die casting or the like whose longitudinal direction is aligned with the depth direction of the top plate substantially directly above the base main body 10, and the top surface of the top plate main body A1. It is flat so that it can be placed. And the insertion hole A21 for inserting the volt | bolt (illustration omitted) for supporting and fixing the top-plate main body A1 from the downward direction is formed in the multiple places of a longitudinal direction. Further, since the top plate receiver A2 is fixed to the support column 4 by the tapping bolt TB3, the insertion hole A22 for inserting the tapping bolt TB3 is formed in a longitudinal direction corresponding to the mounting hole 45a formed in the fixing plate 45 of the support column 4. Two are formed in the center of the direction. As described above, by fixing the two round pipe-shaped support columns 4 to the top plate receiver A2, horizontal rotation of the support columns 4 in the hollow portion 33 is restricted. Further, on the inward surface side of the top plate receiver A2, a square-shaped projection A23 that protrudes substantially horizontally inward is integrally provided, and the projections A23 of the left and right top plate receivers A2 are formed in a square pipe shape. By inserting both ends of the support rod A3, the top plate receivers A2 are connected by the support rod A3. The support rod A3 supports the top plate body A1 together with the top plate receiver A2 from below.
[0024]
The lifting leg B of the desk D described above functions as follows and can change the height of the top board A. That is, in this lifting leg B, the support column 4 is moved up and down with respect to the core member 2 fixed directly to the base body 10 in the hollow portion 33 of the support column cover 3 fixed to the leg base 1. Any one of the plurality of engagement holes 41 formed in the support column 4 is the through hole 25 of the core material 2, the nut 26, the through hole 27 a of the spacer 27, and the through hole 37 of the support column cover 3. The fixing bolt 5 is inserted into the through hole 37, the through hole 27 a, the engagement hole 41, and the through hole 25 in this order from the inner surface side of the column cover 3 at a height position that matches the position of the column cover 3, and then fastened to the nut 26. At this time, the head 51 of the fixing bolt 5 passes through the through hole 37 of the column cover 3 having a larger diameter, and the base end portion 52 a of the shaft portion 52 of the fixing bolt 5 is engaged with the engagement hole 41 of the column 4. It is mounted on the opening edge. Further, when the fixing bolt 5 and the nut 26 are fastened, the core material 2 is drawn toward the support column 4, but the core material 2 is inclined because the surface of the spacer 27 comes into contact with the inner surface of the support column 3. Strong fixation is realized. As a result, the load of the support 4 via the fixing bolt 5 and the top plate A supported by the support bolt 5 or the object placed on the top plate A does not act on the thin support cover 3 at all, but the core. The material 2 and the leg base 1 can be supported via the material 2. For this reason, if the base body 10 and the core material 2 are made to be highly rigid, the column cover 3 can be made as thin as possible without changing from the conventional leg part in terms of appearance. It is possible to provide an excellent lifting leg B that does not cause a lack of support strength.
[0025]
Further, when changing the height position of the above-described top plate A, the fixing bolt 5 is once pulled out, and as shown by the arrow in FIG. At a height position where the engagement hole 41 matches the through hole 25 of the core member 2, the nut 26, the through hole 27 a of the spacer 27 and the through hole 37 of the column cover 3, the fixing bolt 5 is inserted from the inner surface side of the column cover 3. The through hole 37, the through hole 27a, the engagement hole 41, and the through hole 25 may be inserted in this order and then fastened to the nut 26. When the support column 4 is moved up and down, the presence of the upper slider 38 and the lower slider 43 disposed in the gap formed between the hollow portion 33 of the support column cover 3 and the support column 4 stabilizes the smooth support column 4. The sliding motion is guaranteed. Furthermore, since the upper slider 38 fixed to the support column cover 3 using the cover 39 and the lower slider 43 fixed to the support column 4 have substantially the same size, the upper limit for moving the support column 4 upward is The range until the upper end of the lower slider 43 comes into contact with the lower end of the slider 38 is restricted. In other words, the upper slider 38 not only functions to ensure a stable and smooth vertical movement of the support column 4 but also functions as an upward movement restricting portion for the support column 4 in cooperation with the cover 39, and is suitable for preventing the support column 4 from coming off. Has an effect. In addition, the stability of the column cover 3 is sufficiently ensured because the protrusion 15 formed on the base body 10 is fixed in a posture inserted into the hollow portion 33.
[0026]
The present invention is not limited to the embodiment described above. For example, the number of hollow portions, the number of core members and struts corresponding thereto, and the number of leg portions can be changed as appropriate. In particular, the column cover can be appropriately changed from a synthetic resin material or the like. Further, the present invention is not limited to the above-described desk legs but is also useful when applied to various furniture legs such as desks, tables, and chairs having other configurations. . In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
[0027]
【The invention's effect】
As described in detail above, the present invention is applied to a leg portion of a desk or chair, and is supported by a leg base in order to adjust the height of a furniture body such as a top plate or a seat portion. In addition to the double structure of the supporting column cover and the supporting column that supports the furniture body by moving up and down in the hollow part of the supporting column cover, a core material that is supported separately from the supporting column on the leg base is placed in the hollow part of the supporting column cover. A structure in which the inserted triple structure is supported by the core material instead of the support cover as in the conventional product is adopted as the support structure positioned at a desired height position. For this reason, the core material and the leg base are all subjected to the load of the support column, the furniture body, and the load, and it does not act on the support column cover at all. As a result, in the conventional lifting legs, excessive shearing force was applied to the column cover, resulting in insufficient strength. However, the present invention can alleviate this, and the column cover is made of, for example, an aluminum die. It can be made of a thin material such as cast or synthetic resin, and the material and appearance of the column cover can be freely selected in this way. Strengthening and stabilization can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overview of a desk to which an embodiment of the present invention is applied.
FIG. 2 is a front view of the desk.
3 is a schematic sectional view taken along the line dd in FIG.
FIG. 4 is an exploded perspective view of the embodiment.
FIG. 5 is a perspective view showing an assembled state of the embodiment.
6 is a cross-sectional view taken along line aa in FIG.
7 is a sectional view taken along line bb in FIG. 3. FIG.
8 is a sectional view taken along line cc in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Leg base 2 ... Core material 3 ... Column cover 4 ... Column 5 ... Fixing bolt 10 ... Base main body 15 ... Projection part 26 ... Nut 27 ... Spacer 33 ... Hollow part 37 ... Through-hole 41 ... Engagement hole 51 ... Head 52 ... Shaft A ... Furniture body (top)
B ... Lifting leg

Claims (10)

It is applied to the legs that support the furniture body, and moves the furniture body up and down,
A leg base mainly composed of a base body arranged in contact with the floor, a hollow column cover arranged in an upright position on the leg base, and a vertically movable inside the hollow part extending in the vertical direction of the column cover A support column that is inserted from above and supports the furniture body from below, and a core member that is inserted from below into the hollow portion of the support column cover is fixed to the base body in an upright posture. in, up and down either of any one selected from a plurality of height positions obtained by moving towards the height strut in position struts adapted to fixedly engage with the core member And
A plurality of engagement holes are formed in the column at predetermined intervals along the height direction, and through holes are formed at the same height position of the column cover and the core material. Correspondingly, the nut is fixed, and the fixing bolt inserted into the through hole from the outside of the column cover is inserted into any of the engagement hole of the column and the through hole of the core material, and then fastened to the nut. Thus, the lifting leg is configured so that the shaft portion of the fixing bolt is engaged only with the engagement hole . The diameter of the through hole formed in the pillar cover, the lifting legs of claim 1, wherein it is assumed larger than the head of the fixing bolt. The support column is a hollow member having a substantially equal cross-sectional shape along the longitudinal direction, and the core member has a substantially equal cross-sectional shape different from the support column along the longitudinal direction and is inserted into the hollow interior of the support column. The elevating leg according to claim 1 or 2, wherein a spacer that is in close contact with a part of the inner surface of the support column is provided at a portion where the through hole is formed in the core member when the bolt and the nut are fastened . The strut cover having a pair of hollow portions, and a leg base and a pair of struts provided with a pair of core members inserted into the pair of hollow portions, respectively, and corresponding core members and struts in each hollow portion. The raising / lowering leg of Claim 1 comprised so that it may engage . It is applied to the legs that support the furniture body, and moves the furniture body up and down,
A leg base mainly composed of a base main body arranged on the floor, a support column cover having a pair of hollow portions arranged in a standing posture on the leg base, and a pair of hollows extending in the vertical direction of the support column cover A pair of support columns that are inserted from above so as to be able to move up and down in the interior and support the furniture main body from below, and a pair of core members inserted from below into the pair of hollow portions of the support column cover are placed upright on the base body In the pair of hollow portions of the column cover, at one height position selected from a plurality of height positions obtained by moving the pair of columns vertically in either direction. An elevating leg characterized in that a pair of struts can be respectively engaged and fixed to the corresponding pair of core members . The elevating leg according to claim 4 or 5, wherein both upper ends of the pair of columns are fixed to the furniture body, and the columns can be moved up and down synchronously . The elevating leg according to claim 1, 2, 3, 4, 5 or 6, wherein the support is provided with a slider interposed in a gap between the outer surface of the support and the inner surface of the hollow portion of the support cover . 8. The slider according to claim 7, wherein the slider is disposed at a lower end portion of the support column, and an upper movement restricting portion is formed at the upper end portion of the support column cover so as to contact the slider of the support column and restrict the upward movement of the support column. Lift legs. A protrusion projecting upward is formed on the upper surface of the base body, the core material is disposed in an upright posture on the protrusion, and the support cover is inserted into the hollow portion of the support cover from below. The raising / lowering leg of Claim 1, 2, 3, 4, 5, 6, 7 or 8 currently fixed to the base main body . The elevating leg according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the support cover is an aluminum die-cast product or a synthetic resin product.

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