JP2001104078A - Leg device for furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leg device for furniture which is a height controllable leg device for furniture used in furniture such as a desk, a table and which can roughly control and finely control the height, control the height simply regardless of the condition of a floor surface, and keep the height controlled state very stably, and further has good outward appearance. SOLUTION: A sub-leg body 9 is connected to the lower part of a main leg body 8 to be height-controlled in multi-stage, a bearing member 10 fitted with a grounding member 11 or a caster is screw-engaged with the lower end part of the sub-leg body 9 to be height-controlled, and the lower end of a cylindrical cover 14 externally fitted to the main leg body 8 is fitted to the bearing member 10 to be unrotatable by projecting and recessed parts, thereby covering the lower part of the main leg body 8 and an exposed part of the sub-leg body 9. The cylindrical cover 14 is rotated to finely control the height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjustable leg device used for furniture such as a desk and a table, and more particularly to a furniture leg device capable of coarsely and finely adjusting the height. It is about.

[0002]

2. Description of the Related Art Hitherto, various types of height adjustable furniture leg devices used for furniture such as desks and tables have been provided. Usually, a support leg such as a table is provided with an adjuster serving also as a grounding member at a lower end, and a screw shaft of the adjuster is screwed into a screw hole at a lower end of the support leg so that the height can be finely adjusted.

However, the above-described structure in which the height of the adjuster is adjusted by rotating the adjuster can be relatively easily rotated as long as the floor surface is slippery with respect to the adjuster. It is difficult to rotate if you are on a cushion floor. Furthermore, the adjuster is suitable for fine adjustment in structure,
Large height adjustments are not possible.

As a leg device capable of largely adjusting the height, as disclosed in Japanese Utility Model Publication No. 45-18952, a plurality of engaging grooves are provided vertically below a cylindrical main leg. The sub-legs formed at intervals are fitted, a cylindrical connecting member is fixed to the lower end of the main leg, and the inwardly projecting pieces of the lower ends of the plurality of spring feet extending downward from the connecting member are engaged. The ring is fitted into the groove, the ring is loosely fitted to the outside of the connecting member, the inwardly projecting peripheral edge of the lower end of the ring is fitted into the groove outside the lower end of each spring foot, and the upper end of the ring is directed inward. One in which a peripheral protruding edge abuts on an upper end of a connecting member is provided.

[0005] However, the leg device described in the above publication can roughly adjust the height relatively easily, but cannot finely adjust the height. Even if the grounding plate provided at the lower end of the sub leg has an adjuster function so that it can be finely adjusted, the above-described problem occurs when the grounding plate grounded on the floor surface is rotated. Further, since the sub-leg protrudes below the main leg, the engaging groove is exposed and the appearance is impaired.

[0006]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide a height adjustable furniture leg device used for furniture such as a desk and a table. Coarse adjustment and fine adjustment are possible, and the height can be easily adjusted regardless of the condition of the floor surface. An object of the present invention is to provide an excellent furniture leg device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is an adjustable-height leg device used for furniture such as a desk and a table, wherein a sub-leg is provided below a main leg. A cylindrical cover which is connected in a multi-stage height-adjustable manner, and which is screwed in a height-adjustable manner with a receiving member having a grounding member or a caster attached to the lower end of the sub-leg, and is externally inserted into the main leg. The lower end is non-rotatably fitted to the receiving member to cover the lower portion of the main leg and the exposed portion of the sub leg, and the height is finely adjusted by rotating the cylindrical cover. A furniture leg device was constructed.

Here, the adjusting male screw portion formed on the outer peripheral surface of the lower end portion of the sub leg is screwed into the adjusting female screw portion formed on the inner peripheral surface of the receiving member by adjusting the screwing depth. Along with
It is preferable that the lower end of the cylindrical cover is non-rotatably fitted to the peripheral edge of the upper end of the receiving member.

In a preferred embodiment, a support shaft is provided below the receiving member, and the ground member or the caster is selectively mounted rotatably using the support shaft.

The sub-legs are connected in a multistage manner so that the height of the sub-legs can be adjusted in a lower portion of the main leg formed of a cylindrical body by interposing a cylindrical connecting member formed in two or a C-shaped cross section. In order to achieve this, a plurality of annular engaging grooves are formed at regular intervals in the vertical direction on the outer peripheral surface of the sub-leg, and an engaging protrusion that engages with the engaging groove is formed on the inner peripheral surface of the connecting member. Alternatively, a plurality of protrusions are provided, and a flange portion for abutting the main leg and a male screw portion above the flange are formed at the lower portion of the outer peripheral surface, and the connecting member is exteriorly provided on the sub leg and is provided in a predetermined engagement groove. With the engagement projections engaged, a female screw portion formed on the inner peripheral surface of the lower end portion of the main leg is screwed to the male screw portion of the connecting member to clamp the connecting member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 and 2 show a table to which the furniture leg device of the present invention is applied, and FIGS.
FIG. 7 is a first embodiment of the present invention, and FIGS.
In the embodiment, reference numeral 1 denotes a top plate, 2 denotes a pillar (leg device), and 3 denotes a panel.

First, the table in this embodiment supports four corners of the irregularly shaped top plate 1 with four pillars 2,..., And the rear two pillars 2, 2 are part of the top plate 1. The upper ends are exposed in the cutouts 4, 4 formed on the panel 3, and the pillars 2, 2 having the exposed upper ends are supported by the caps 5 on the columns 6, 6 of the panel 3 in an upright state. Here, in order to fix the pillar 2 to the lower surface of the top plate 1, as shown in FIG.
A connecting rod 7B formed of a square pipe extending laterally from the fixing portion 7A of the cylindrical pillar 2 has an opening 2A
And the fixing portion 7A is attached to the lower surface of the top plate 1 by screwing or the like. The connecting rod 7B located at the center of the pillar 2 has a support hole 7 penetrating vertically.
C is formed, and the shaft 6A of the column 6 penetrating the cap 5 is inserted into the support hole 7C to firmly support the support.

In the furniture leg device 2 of the present invention, the sub leg 9 is connected to the lower portion of the main leg 8 so that the height can be adjusted in multiple stages, and the lower end of the sub leg 9 is connected to the grounding member. It has a basic structure in which a receiving member 11 to which a caster 11 or a caster 12 is attached is continuously screwed so as to be adjustable in height. Here, as a structure for connecting the sub-leg 9 to the lower part of the main leg 8 so that the height can be adjusted in multiple stages, a structure such as simply screwing and fixing from the outside or supporting with a pin is adopted. However, it is preferable to adopt the connecting structure described later, because the height can be roughly adjusted easily and the state after the height adjustment is stabilized.

As shown in FIG. 3 to FIG. 6, the furniture leg device 2 according to the first embodiment of the present invention has the main leg 8 formed of a cylinder, and is provided in a lower portion of the main leg 8. The sub-leg 9 is connected to the sub-leg 9 so that the height can be adjusted in multiple stages with a tubular connecting member 13 formed in two, and the lower end of the sub-leg 9 is covered with the lower end. The receiving member 10 is screwed into the main leg 8 so as to be adjustable in height, and the lower end of the cylindrical cover 14 that is externally vertically movably fitted to the main leg 8 is non-rotatably fitted into the receiving member 10 so as to be uneven. Of the lower leg and the exposed portion of the sub-leg 9, and the height is finely adjusted by rotating the cylindrical cover 14.

More specifically, the main leg 8 is formed of a metal long round pipe, and a female screw portion 15 is formed on the inner peripheral surface at the lower end.
Is formed by caulking or the like.

The sub-leg 9 is formed of a short metal round pipe, and has a plurality of annular engaging grooves 16,... A male screw part 17 for adjustment is formed on the surface. Furthermore,
On the outer peripheral surface of the sub leg 9, each of the engagement grooves 16, 1
6, a through hole 18 is formed.

The connecting member 13 comprises a pair of split members 13A and 13B made of synthetic resin and divided into two parts.
The two divided members 13A and 13B are symmetrical with respect to each other, and have a cylindrical shape when joined. A pair of a convex portion 19 and a concave portion 20 are formed at the joining edge of the two divided members 13A and 13B so as to fit into each other. The engagement groove 1 is formed on the inner peripheral surface of the connection member 13.
A single or a plurality of engaging projections 21 engaging with the main legs 8 are formed at the lower portion of the outer peripheral surface, and a male screw portion 23 is formed above the flange portion 22. ing. The male screw portion 23 is formed so that the screw thread becomes higher as it goes downward. Also, in the present embodiment, the engaging projections 21,...
A projection 24 is formed on the inner peripheral surface of 13B to fit into the through-hole 18 to prevent rotation.

The receiving member 10 is made of a synthetic resin and is a low-end cylindrical member that is open upward. The receiving member 10 is provided on the inner peripheral surface of a cylindrical portion 25 that receives the lower end of the sub-leg 9. Female screw part 2 for adjusting screwed male screw part 17 of sub leg 9
6, an annular step portion 28 for fitting the lower end of the cylindrical cover 14 to the outside of the upper peripheral edge of a receiving portion 27 extending upward while increasing the diameter from the cylindrical portion 25.
And two longitudinal grooves 2 are formed on four sides of the annular step 28.
9, ... are formed. Here, the outer peripheral surface of the cylindrical portion 25 has a tapered shape whose diameter decreases downward.

Further, a through-hole 31 is formed at the center of the bottom plate 30 of the receiving member 10, and a screw shaft 33 formed at the upper end of the support shaft 32 is inserted into the through-hole 31 from below.
The bottom plate 30 is fastened by a nut part 34 integrally formed at an intermediate part of the support shaft 32 and a fastening member 35 screwed to the screw shaft 33 from above, and the support shaft 32 is vertically attached to the receiving member 10. I have. The support shaft 32 has an annular groove 36 on its outer peripheral surface at the lower end. Here, the fastening member 35 is formed of a normal nut, and a fitting cylinder 30A having a polygonal inside is integrally formed on the upper surface of the bottom plate 30 in the tubular portion 25.
The screw shaft 33 is screwed in a state where the fastening member 35 is internally fitted to 0A and is prevented from rotating. Further, the receiving member 10 and the support shaft 32 can be integrated by insert molding in addition to being fixed by the fastening member 35.

The cylindrical cover 14 is made of a synthetic resin and has a cylindrical shape and is integrally formed. The cylindrical cover 14 is set to have a dimension which can be inserted vertically into the main leg 8 so as to be vertically movable. Projections 37,... Are formed in four places on the surface in the vertical direction.

The connecting member 13 is externally mounted on the sub-leg 9, and the engaging projection 21 is engaged with the predetermined engaging groove 16, and the projection 24 is fitted into the through hole 18 to prevent rotation. In this state, the female screw part 15 on the inner peripheral surface of the lower end of the main leg 8 with the cylindrical cover 14 extrapolated is screwed into the male screw part 23 of the connecting member 13, and the lower end of the main leg 8 is connected to the flange. At 22, the connecting member 13 (divided members 13 </ b> A, 13 </ b> B) is sandwiched from outside, so that the engagement of the engagement protrusion 21 with the engagement groove 16 is further ensured. In addition to the detent structure by the through hole 18 and the projection 24, the connecting member 13 and the sub-leg 9 are fixed by screwing from the outside, fixed by inserting a pin, or the inner periphery of the connecting member 13. It is possible to adopt a rotation preventing structure by non-rotatable fitting between the surface and the outer peripheral surface of the auxiliary leg 9.

On the other hand, the adjusting male screw portion 17 on the outer peripheral surface of the lower end portion of the sub-leg 9 is screwed into the adjusting female screw portion 26 on the inner peripheral surface of the receiving member 10 by adjusting the screwing depth. After that, the cylindrical cover 14 is pushed down to fit the lower end of the cylindrical cover 14 into the annular step portion 28 at the peripheral edge of the upper end of the receiving member 10, and the cylindrical shape is inserted into the vertical grooves 29 of the receiving member 10. The lower ends of the ridges 37,. Thus, by rotating the cylindrical cover 14, the receiving member 10 is rotated, and the adjusting male screw portion 17 and the adjusting female screw portion 2 are rotated.
The screwing depth of No. 6 continuously changes, and the height can be finely adjusted.

As described above, by selecting the engagement grooves 16,... Of the sub-legs 9 for engaging the engagement protrusions 21,. , That is, the height can be roughly adjusted. Further, the male screw part 1 for adjustment of the sub-leg 9
The screw 7 is screwed into the adjusting female screw portion 26 of the receiving member 10 by adjusting the screwing depth, whereby the height can be finely adjusted according to the rotation state. Since the cylindrical cover 14 is non-rotatably fitted to the receiving member 10, when the height is finely adjusted, the cylindrical cover 1 is not rotated.
If the rotating member 4 is rotated, the receiving member 10 also rotates, so that the adjusting operation is easy.

Next, the grounding member 1 is attached to the receiving member 10.
The structure for attaching the caster 1 or the caster 12 will be described. First, the grounding member 11 is shaped like a truncated cone with a lower part widened, and has a concave part 38 which is open at the upper part for fitting the cylindrical part 25 of the receiving member 10, and a center of a lower surface plate 39 of the concave part 38. A concave portion 40 for receiving the nut portion 34 of the support shaft 32 and a support cylinder 41 into which the support shaft 32 is fitted are vertically provided downward, and the support shaft 3 is further provided on the lower end of the inner wall surface of the support tube 41.
An engagement projection 42 that engages with the second annular groove 36 is formed. Therefore, in order to attach the grounding member 11 to the receiving member 10, it is only necessary to fit the grounding member 11 to the receiving member 10 while inserting the support shaft 32 into the support cylinder 41 from below. Are engaged with the annular groove 36 in a retaining state, and the upper edge of the concave portion 38 of the grounding member 11 is
Thus, the outer peripheral surface of the 0 tapered cylindrical portion 25 is in close contact with the outer peripheral surface. Here, since the grounding member 11 is rotatable with respect to the receiving member 10, even if the grounding member 11 is in strong contact with the floor surface F and it is difficult to rotate, the receiving member 10 is rotated to increase the height. Can be fine-tuned.

On the other hand, although not shown, the caster 12 has a concave portion 40 and a support cylinder 41 similar to those of the grounding member 11, and has a similar engagement convex portion 42 inside the support cylinder 41. Therefore, the support member 32 is inserted into the support cylinder 41 from below while the caster 12 is inserted into the support cylinder 41 from below.
Can be rotatably attached to the receiving member 10 in the same manner as described above. The support shaft 32 is a component that originally constitutes the caster 12, and is fixed to the receiving member 10 in advance in the present embodiment, so that the ground member 11 is attached using the support shaft 32. It was done.

Next, a furniture leg device 2 according to a second embodiment of the present invention is basically the same as the first embodiment, as shown in FIGS. That is, the main leg 8 is formed in a cylindrical body, and the sub leg 9 is multi-staged by interposing a cylindrical connecting member 13 having a substantially C-shaped cross section in the lower portion of the main leg 8. The receiving member 10 is connected to the lower end of the sub leg 9 so as to cover the lower end so as to cover the lower end, and is connected to the main leg 8 so as to be vertically movable. The lower end of the inserted cylindrical cover 14 is fitted to the receiving member 10 to cover the lower portion of the main leg 8 and the exposed portion of the sub leg 9.

The present embodiment is different from the first embodiment in that the connecting member 13 is integrally formed in a substantially C-shaped cross section, and the support shaft 32 is connected to the grounding member 11.
Alternatively, they are provided integrally with the casters 12, respectively. Other configurations are the same as those described above. Therefore, the same or similar configurations are denoted by the same reference numerals and description thereof is omitted, and only different configurations will be described here.

The connecting member 13 is made of synthetic resin and is integrally formed in a substantially C-shaped cross section. The connecting member 13 can be fitted on the outer peripheral surface of the sub-leg 9 by expanding a slit 43 provided in the axial direction. Are formed on the inner peripheral surface, and engaging projections 21 and 21 for engaging with the engaging grooves 16 are provided on the inner peripheral surface, and the main leg 8 is held at a lower portion of the outer peripheral surface. Shoulder 4
4, and a male screw portion 23 is formed above it. A thin portion 4 is formed in the axial direction of the inner peripheral surface facing the slit 43.
5 are formed so as to be easily attached to the sub leg 9.

Further, the cylindrical cover 14 is formed such that only a lower end portion of the cylindrical member 14 which fits into the annular step portion 28 of the receiving member 10 is made thin to form a fitting portion 46, and an inner peripheral surface of the fitting portion 46 is formed. At the same position as the ridges 37,...

The grounding member 11 is shaped like a truncated cone with a lower part widened, and the cylindrical part 2 of the receiving member 10 is formed on the upper part.
5 is formed, and a concave portion 38 which is open upward is formed therein.
8, a screw shaft 48 protrudes instead of the support shaft 32, and the screw shaft 48 is inserted into the through hole 3 of the bottom plate 30 of the receiving member 10.
1 and a fastening member 35 composed of a nut screwed from above into the screw shaft 48 and screwed and connected thereto. Here, it is preferable that the screw shaft 48 be rotatable with respect to the main body of the grounding member 11. The caster 12 has a structure in which the support shaft 32 is rotatably integrated. As shown in FIG. 10, the screw shaft 33 at the upper end of the support shaft 32 is fastened by the fastening member 35 in the same manner as described above. The receiving member 1
0 is attached to the bottom plate 30.

In this embodiment, the procedure for adjusting the height is the same as that described above.
The sub-legs 9 which engage the engaging protrusions 21,.
Are fitted to the sub-legs 9. Then, similarly to the above, the female screw portion 15 of the main leg 8 with the tubular cover 14 extrapolated is connected to the male screw portion 23 of the connecting member 13.
And the lower end of the main leg 8 is abutted by the shoulder portion 44 to clamp the connecting member 13 from the outside. On the other hand, after the adjusting male screw portion 17 on the outer peripheral surface of the lower end portion of the sub leg 9 is screwed into the adjusting female screw portion 26 on the inner peripheral surface of the receiving member 10 by adjusting the screwing depth, By pushing down the cylindrical cover 14, the receiving member 1
, The lower end of the cylindrical cover 14 is fitted into the annular step 28, and the cylindrical cover 1 is inserted into the vertical grooves 29,.
4 are non-rotatably fitted with the projections 47.

The furniture leg device (pillar 2) according to the present invention comprises:
The present invention is not limited to being used for a desk or a table, and can be applied to general furniture requiring height adjustment. For example, it can be used as a partition panel, a partition panel, or a column of a storage shelf.

[0033]

The leg apparatus for furniture according to the first aspect of the present invention is a leg apparatus capable of adjusting the height used for furniture such as a desk and a table, and has a sub-leg below a main leg. A cylinder connected to the body so that the height can be adjusted in multiple stages, and a receiving member having a grounding member or a caster attached to the lower end of the auxiliary leg so as to be adjustable in height, and is externally inserted into the main leg. The lower end of the cover is non-rotatably fitted to the receiving member to cover the lower portion of the main leg and the exposed portion of the sub-leg, and the height is finely adjusted by rotating the cylindrical cover. This makes it possible to make coarse and fine adjustments to the height, and to easily adjust the height regardless of the condition of the floor surface. Adjustment work is easy because fine adjustment is possible

According to the second aspect, by rotating the cylindrical cover, the receiving member is rotated, and the screwing depth of the adjusting male screw portion and the adjusting female screw portion is continuously changed. The height can be finely adjusted, and the diameter of the cylindrical cover is sufficiently larger than the male screw part for adjustment, so that the torque is reduced and the rotation work is easy.

According to the third aspect, the grounding member or the caster can be selectively attached by using the support shaft provided on the receiving member, so that the cost can be reduced by using common components, and the grounding can be achieved. Since the height can be finely adjusted by rotating the cylindrical cover while the member or the caster is placed on the floor, the adjustment operation is extremely simple.

According to the fourth aspect, the height can be roughly adjusted, and the state after the height adjustment can be extremely stably maintained despite the simple operation.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a table to which a furniture leg device of the present invention is applied.

FIG. 2 is a partially exploded perspective view showing a connection structure between a pillar and a top plate.

FIG. 3 is an exploded perspective view showing the first embodiment of the furniture leg device of the present invention.

FIG. 4 is a longitudinal sectional view of a main part showing a state in the middle of adjustment when the cylindrical cover is pushed up.

FIG. 5 is a longitudinal sectional view of a main part showing a use state in which the tubular cover is pressed down.

FIG. 6 is a longitudinal sectional view of a main part showing a use state in which a caster is mounted instead of the grounding member.

FIG. 7 is an exploded perspective view showing a second embodiment of the furniture leg device of the present invention.

FIG. 8 is a longitudinal sectional view of a main part showing a state in which adjustment is being performed while pushing up the cylindrical cover.

FIG. 9 is a longitudinal sectional view of a main part showing a use state in which the tubular cover is pushed down.

FIG. 10 is a longitudinal sectional view of a main part showing a use state in which a caster is mounted instead of the grounding member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 2 Furniture leg device (pedestal) 3 Panel 4 Notch 5 Cap 6 Support 7 Fixing bracket 8 Main leg 9 Sub leg 10 Receiving member 11 Grounding member 12 Caster 13 Connecting member 14 Cylindrical cover 15 Female screw Part 16 Engagement groove 17 Male screw part for adjustment 18 Through hole 19 Convex part 20 Concave part 21 Engagement protrusion 22 Flange part 23 Male screw part 24 Projection 25 Tube part 26 Female screw part for adjustment 27 Receiving part 28 Ring step 29 Vertical Groove 30 Bottom plate 31 Through hole 32 Support shaft 33 Screw shaft 34 Nut portion 35 Fastening member 36 Annular groove 37 Ridge 38 Recess 39 Lower surface plate 40 Depression 41 Support cylinder 42 Engagement protrusion 43 Slit 44 Shoulder 45 Thin portion 46 Fitting part 47 Projection part 48 Screw shaft F Floor surface

Claims (4)

[Claims] 1. A height adjustable leg device used for furniture such as a desk and a table, wherein a sub leg is connected to a lower portion of a main leg so as to be height adjustable in multiple stages, and said sub leg is provided. A receiving member having a grounding member or a caster attached to the lower end of the main body is screwed so as to be adjustable in height, and the lower end of a cylindrical cover externally inserted into the main leg is non-rotatably fitted to the receiving member so as to be non-rotatable. A leg device for furniture, wherein the lower portion of the leg and the exposed portion of the sub-leg are covered, and the height is finely adjusted by rotating the cylindrical cover. 2. The adjusting male screw formed on the outer peripheral surface of the lower end of the sub-leg is screwed into the adjusting female screw formed on the inner peripheral surface of the receiving member by adjusting the screwing depth. The furniture leg device according to claim 1, wherein the lower end of the cylindrical cover is non-rotatably fitted to the upper peripheral portion of the receiving member. 3. The furniture leg device according to claim 1, wherein a supporting shaft is provided on the receiving member, and the grounding member or the caster is selectively attached rotatably using the supporting shaft. 4. In a lower portion of the main leg formed of a cylinder,
A plurality of annular engagement grooves are formed on the outer peripheral surface of the sub-leg in order to connect the sub-leg in such a manner that the height of the sub-leg can be adjusted in multiple stages with a tubular connecting member formed into two or a C-shaped section. Formed at regular intervals in the vertical direction, one or a plurality of engaging projections are provided on the inner peripheral surface of the connecting member to engage with the engaging grooves, and the main leg body is fixed to a lower portion of the outer peripheral surface. A lower threaded inner peripheral surface of the main leg in a state in which a flange portion to be formed and a male thread portion above the flange portion, the connecting member is externally mounted on the sub leg, and an engaging projection is engaged with a predetermined engaging groove. The leg device for furniture according to claim 1, wherein the female screw portion formed in (1) is screwed into the male screw portion of the connecting member to sandwich the connecting member.