JPH07327745A - Leg structure for furniture - Google Patents

Abstract

PURPOSE:To simultaneously satisfy a moving function, a stably setting function and a height changing function by selectively attaching a caster and a leg extension through the intermediary of a support member formed to a leg. CONSTITUTION:A synthetic resin support member 7a in which a first attaching shaft 6 formed to a caster 5 and having a vertical posture is removably fitted and held, is driven into and embedded in the lower end face of a leg 2 at the center position. Further, a second attaching shaft 9 incorporating a fitting part 6a having the same shape and the same dimension at those of the fitting part 6a of the first attaching shaft 6, is projected in a vertical posture from the upper surface of a woody leg extension 8 which can make contact with the lower face of the leg 2, and which has the same cross-sectional shape as that of the leg 2. The second attaching shaft 9 of the leg extension 8 and the first attaching shaft 96 of the caster 5 can be selectively engaged and held to the first support member 7A of the leg 2. Due to the provision of the castor, the furniture can be easily displaced, and after the caster 5 is removed from the support member 7A of the leg 2 the leg extension 8 is removed from the second attaching shaft 9, and the height of the top board 1 is changed by two stages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg structure for furniture, such as a table and a desk, in which legs are attached to a top plate.

[0002]

2. Description of the Related Art Conventionally, as a leg structure of furniture, a supporting member for detachably fitting and holding a mounting shaft in a vertical position provided on a caster is embedded in a lower end surface of a leg mounted on a top plate. Or a concave portion into which a columnar projection protruding from the central portion of the upper surface of the extension leg is detachably fitted in the vertical direction is formed on the lower end surface of the leg attached to the top plate. , A bolt projecting at a central position in the concave portion, and further, the extension leg is formed with a female screw that can be screwed into the bolt (for example, actual open flat 4-571).
No. 14) is proposed.

[0003]

Considering the usage form of this type of furniture, a moving function for easily moving the furniture to an arbitrary position, a stable installation function for stably installing the furniture at a predetermined position,
A height changing function is required to change the height of the top board according to the purpose of use. However, in the conventional leg structure by the former, furniture can be easily moved by mounting the caster on the support member provided on the lower end surface of the leg, and by removing the caster from the leg,
Furniture can be installed in place with good stability, but the height of the top plate cannot be changed. In addition, in the conventional latter leg structure, the height of the top plate can be changed according to the purpose of use by removing the extension legs from the legs, but the moving function of the furniture is taken into consideration. Absent. An object of the present invention is to provide a furniture leg structure capable of satisfying the above-mentioned three functions while simplifying the leg side attachment structure.

[0004]

In order to achieve the above object, a furniture leg mounting structure according to claim 1 of the present invention comprises:
A support member for detachably fitting and holding a first mounting shaft provided in a caster in a vertical direction is embedded in the lower end surface of the leg attached to the top plate, and can be contacted with the lower end surface of the leg. On the upper end surface of the extension leg, a second attachment shaft having a fitting portion that is the same as or substantially the same as the fitting portion of the first attachment shaft is provided so as to project in a vertical direction, and the second attachment of the extension leg is performed. The shaft and the first mounting shaft of the caster can be selectively fitted and held with respect to the supporting member of the leg. Further, according to claim 2 of the present invention, when the second attachment shaft is fitted and held on the upper end surface of the extension leg by the support member, the locking hole formed in the lower end surface of the leg is It is also possible to provide a projection that is detachably fitted in the vertical direction. Further, according to a third aspect of the present invention, the same supporting member as the supporting member of the leg is embedded in the lower end surface of the extension leg, and the same locking hole as the locking hole of the leg is formed. You may.

[0005]

According to the structure of claim 1, the furniture can be easily moved to an arbitrary position by fitting and holding the first mounting shaft of the caster on the support member provided on the lower end surface of the leg. The height of the top plate can be changed in two steps by removing the caster from the support member of the leg and then detaching and attaching the second mounting shaft of the extension leg to the support member. Furthermore, by removing the casters from the legs, the furniture can be stably installed at a predetermined position.

According to the second aspect of the invention, when the second mounting shaft of the extension leg is fitted and held by the leg support member, the protrusion provided on the upper surface of the extension leg is formed on the lower surface of the leg. Since the extension leg can be prevented from rotating with respect to the leg because it is fitted into the locking hole, the fitting holding force between the support member of the leg and the first mounting shaft or the second mounting shaft can be reduced. The weight of the caster is set to be smaller than that of the caster while facilitating the operation of attaching and detaching the caster and simplifying the fitting and holding structure by setting the force to a level that can prevent the caster from slipping out when lifting furniture. The extension of a certain extension leg is combined with the retention force of the fitting between the support member of the leg and the second mounting shaft of the extension leg and the retention force of the engagement between the locking hole of the leg and the protrusion of the extension leg. It can be prevented by action.

According to the third aspect of the invention, the first mounting shaft of the caster and the second mounting shaft of the other extension leg are further attached to the support member on the lower end surface side of the extension leg fitted and held by the leg. Can be selectively fitted and held.

[0008]

According to the structure of the first aspect, the caster and the extension leg can be selectively attached through one support member provided on the leg, so that the leg side attachment structure can be simplified. However, the moving function, stable installation function, and height changing function required for this type of furniture can be satisfied at the same time.

According to the second aspect of the present invention, not only can the leg and the extension leg be shaped in a predetermined orientation when the cross section of the leg and the extension leg is other than a circular shape, but also the caster can be attached. It is possible to securely attach the extension leg that is heavier than the caster without coming out while simplifying the attachment / detachment operation and simplifying the fitting and holding structure.

According to the structure of claim 3, since the caster and the other extension leg can be selectively attached to the lower end surface of the extension leg fitted and held by the leg, the fitting and holding structure is unified. It is possible to enhance the moving function and height changing function required for furniture while promoting the reduction of manufacturing cost by reducing the number of parts.

[0011]

【Example】

[First Embodiment] FIGS. 1 to 3 show a main part of a table for combined use of a kotatsu, which is an example of furniture, and traverse to each of four corners of the lower surface of a wooden top plate 1 formed in a substantially rectangular shape in plan view. A wooden leg 2 having a substantially elliptical surface shape is detachably screwed and fixed. Specifically, the mounting bracket 3 having a female screw is fixed to the lower surface of the top plate 1 with a screw, and the female screw of the mounting bracket 3 is screwed to the center position of the upper end surface of the leg 2. Possible bolts 4 are screwed and fixed.

At the center position of the lower end surface of the leg 2,
A synthetic resin support member (hereinafter, referred to as a first support member) 7A that detachably fits and holds a first mounting shaft 6 provided in a caster 5 in a vertical direction is embedded by driving, and the leg is also provided. The fitting portion 6a of the first mounting shaft 6 is attached to the upper end surface of a wooden extension leg 8 which can be brought into contact with the lower end surface of the second leg 2 and has the same cross-sectional shape as the leg 2.
A second mounting shaft 9 having a fitting portion 9a having the same shape and size as that of the second mounting shaft 9 of the extension leg 8 and the first mounting shaft 6 of the caster 5 is provided so as to project in the vertical posture. Is configured so that it can be selectively fitted and held with respect to the first support member 7A of the leg 2. In addition, when the second mounting shaft 9 is fitted and held on the first support member 7A of the leg 2, the locking hole formed in the lower end surface of the leg 2 (hereinafter referred to as a locking hole) is formed in the upper end surface of the extension leg 8. , Which is referred to as a first locking hole), and a wooden projection 11 that is detachably fitted in the vertical direction is fixed with an adhesive or the like. Further, on the lower end surface of the extension leg 8, the leg 2
A support member (hereinafter, referred to as a second support member) 7B having the same shape, same size, and same material as the first support member 7A of FIG.
A locking hole having the same shape and size as the locking hole 10 (hereinafter referred to as the second
12 is referred to as a locking hole), and a distance between the first supporting member 7A of the leg 2 and the first locking hole 10 is a distance from the second supporting member 7B.
It is formed in the same state as the interval to.

The first support member 7A has a small-diameter first mounting hole 2a and a large-diameter second mounting hole 2b formed at the center of the lower end surface of the leg 2, and the first mounting hole 2a.
A cylindrical portion 7a to be driven into the second mounting hole 2b and a flange portion 7b located in the second mounting hole 2b are integrally formed, and a leg facing the first mounting hole 2a is formed on the outer peripheral surface of the cylindrical portion 7a. A large number of retaining annular projections 7c having a triangular cross section that bite into the peripheral wall surface of 2 are integrally formed. Also,
A pair of elongated holes 7 are formed at two circumferentially opposed positions on the distal end side of the cylindrical portion 7a at predetermined intervals in the circumferential direction.
The first mounting shaft 6 holds the inner surface of the cylindrical wall portion of the cylindrical portion 7a which is elastically deformable in the radial direction and which is located between the pair of elongated holes 7d. A locking projection 7e that can be engaged with the first elastic ring 13 or the second elastic ring 14 held by the second mounting shaft 9 is integrally formed. The depth of the second mounting hole 2b is set to be slightly larger than the plate thickness of the flange portion 7b of the first supporting member 7A, and the first supporting member 7B
When A is fixed to the leg 2 by fixing, the lower end surface of the collar portion 7b is located in the second mounting hole 2b more than the lower end surface of the leg 2.

Similar to the first support member 7A, the second support member 7B has a small-diameter first mounting hole 8a and a large-diameter second mounting hole formed at the center of the lower end surface of the extension leg 8. 8b, a cylindrical portion 7a driven into the first mounting hole 8a, and a collar portion 7 located in the second mounting hole 8b.
b is integrally formed, and on the outer peripheral surface of the cylindrical portion 7a, a large number of retaining ring-shaped projections 7 having a triangular cross section that bite into the peripheral wall surface of the extension leg 8 facing the first mounting hole 8a.
c is integrally formed to project. In addition, the cylindrical portion 7
At each of the two diametrically opposed positions on the tip side of a,
A pair of elongated holes 7d are formed at predetermined intervals in the circumferential direction, and the pair of elongated holes 7d of the cylindrical portion 7a are formed.
On each of the inner surfaces of the radially thin elastically deformable thin-walled cylindrical wall portions, the first attachment shaft 6 holds the first attachment shaft 6.
A locking projection 7e engageable with the elastic ring 13 or the second elastic ring 14 held by the second mounting shaft 9 is integrally formed to project. The depth of the second mounting hole 8b is set to be slightly larger than the plate thickness of the flange portion 7b of the second support member 7B, and the second support member 7B is extended by the extension leg 8b.
The lower end surface of the collar portion 7b is located in the second mounting hole 8b more than the lower end surface of the extension leg 8 in the state of being driven and fixed.

The second mounting shaft 9 is screwed and fixed to the first mounting hole 8c of the first mounting hole 8c formed on the upper end surface of the extension leg 8 and the second mounting hole 8d having a large diameter. An externally threaded portion 9c and a collar portion 9d located in the second mounting hole 8d are formed. In addition, the second mounting hole 8d
Is set to a dimension slightly larger than the plate thickness of the collar portion 9d of the second mounting shaft 9, and the second mounting shaft 9
When the screw is fixed to the extension leg 8, the upper end surface of the collar portion 9d is located in the second mounting hole 8d more than the upper end surface of the extension leg 8.

The first elastic ring 13 has an outer diameter larger than the outer diameter of the first mounting shaft 6 when no external force is applied to the inner side in the radial direction, and the inner side in the radial direction. When an external force is applied to the side, the first mounting shaft 6 is formed into a C-shape that can be elastically deformed to a diameter equal to or smaller than the outer diameter of the first mounting shaft 6, and is formed on the first mounting shaft 6. Circumferential groove 6b
Engaged and retained within. In addition, the second elastic ring 1
4 also has an outer diameter larger than the outer diameter of the second mounting shaft 9 when no external force is applied to the inner side in the radial direction, like the first elastic ring 13, and When an external force inward in the direction is applied, the second mounting shaft 9 is formed into a C-shape that is elastically deformable to a diameter equal to or smaller than the outer diameter of the second mounting shaft 9. Circumferential groove 9 formed in 9
Engaged and held in b.

On the outer peripheral surface of the protrusion 11, a large number of spiral protrusions having a small protrusion allowance are formed, and the maximum outer diameter of the protrusion 11 is equal to the inner diameter of the first locking hole 10 and the first outer diameter. The diameter is slightly larger than the inner diameter of the two locking holes 12. Therefore, when the second mounting shaft 9 of the extension leg 8 is fitted and held by the first support member 7A of the leg 2, the extension leg 8 is
Since the projection 11 provided on the upper surface of the extension fits into the first locking hole 10 formed on the lower surface of the leg 2 in a slightly press-fitted state, the rotation of the extension leg 8 with respect to the leg 2 can be prevented. Without a small force, the fitting holding force between the first support member 7A of the leg 2 and the second mounting shaft 9 or the first mounting shaft 6 can be prevented so that the caster 5 can be prevented from coming out when the table is lifted. To facilitate the attachment / detachment operation of the caster 5 and simplify the fitting and holding structure, the extension leg 8 which is heavier than the caster 5 does not come out of the first support member of the leg 2. 7A and the fitting holding force between the second mounting shaft 9 of the extension leg 8 and the fitting holding force between the first locking hole 10 of the leg 2 and the projection 11 of the extension leg 8 prevent it. be able to. This also applies to the case where another extension leg 8 is connected to the lower end surface of the extension leg 8 connected to the leg 2. Then, in the combined use of the scorching table configured as described above, the first mounting shaft 6 of the caster 5 is fitted and held by the first supporting member 7A provided on the lower end surface of the leg 2 as shown in FIG. , The table can be easily moved to an arbitrary position, and the caster 5 is removed from the first supporting member 7A of the leg 2 and then the second mounting of the extension leg 8 is performed on the first supporting member 7A. By removing the shaft 9, the height of the top plate 1 can be changed in two steps. Furthermore, by attaching and detaching the second mounting shaft 9 of the other extension leg 8 to the second support member 7A on the lower end surface side of the extension leg 8 connected to the leg 2, the height of the top plate 1 is further increased. It can be changed in steps. That is, the number of steps for changing the height of the top plate can be freely adjusted by the number of connected extension legs 8. Further, the first mounting shaft 6 of the caster 5 can be fitted and held also on the second support member 7A on the lower end surface side of the extension leg 8. When the caster 5 or the extension leg 8 is detached from the leg 2, the first support member 7 is used.
A rubber cap 15 for closing the fitting hole 7f of A is attached. This cap 15 can prevent dust and the like from accumulating in the fitting hole 7f of the first support member 7A, so that the first mounting shaft 6 of the caster 5 and the second mounting shaft 9 of the extension leg 8 are always attached. It can be securely fitted and held.

[Second Embodiment] In the table which is also used as a scissor shown in FIG. 4, elastic bodies 16 such as rubber are attached to the lower end surface of the leg 2 and the lower end surface of the extension leg 8. In this case, when the first mounting shaft 6 is fitted into the first supporting member 7A or when the second mounting shaft 9 is fitted into the second supporting member 7B, the first mounting member fitted due to a manufacturing error or the like. Axis 6
The first elastic ring 13 on the side or the second elastic ring 14 on the side of the second mounting shaft 9 is slightly displaced to the lower end side from the locking projection 7e of the first support member 7A or the locking projection 7e of the second support member 7B. However, if the amount of displacement is within the range of the elastic compression amount of the elastic body 16, the first elastic ring 13 on the first mounting shaft 6 side.
Alternatively, the second elastic ring 14 on the second mounting shaft 9 side can be reliably engaged with the locking projection 7e of the first support member 7A or the locking projection 7e of the second support member 7B. Other configurations are similar to those of the first embodiment.

[Other Embodiments] In the above-described embodiment, the leg 2 is detachably screwed and fixed to the top plate 1. However, the leg 2 is foldably attached to the top plate 1, or The legs 2 may be fixed to the top plate 1 by an adhesive or the like in a non-removable state. The shape of each of the top plate 1, the legs 2, and the extension legs 8 can be changed to various shapes based on the purpose of use, design, and the like. In the above-described embodiment, the first elastic ring 13 on the side of the first mounting shaft 6 or the second elastic ring 1 on the side of the second mounting shaft 9 is used.
4 is configured to be engaged with the locking protrusion 7e of the first support member 7A or the locking protrusion 7e of the second support member 7B, the first elastic ring 13 or the second mounting ring 6 on the side of the first mounting shaft 6 The second elastic ring 14 on the shaft 9 side is brought into pressure contact with the inner peripheral surface of the first supporting member 7A or the inner peripheral surface of the second supporting member 7B, and the first attachment shaft 6 or the first mounting shaft 6 or Two
The mounting shaft 9 may be configured to be retained and retained.
In short, the fitting and holding structure of the first support member 7A and the first mounting shaft 6 and the fitting and holding structure of the second support member 7B and the second mounting shaft 9 are the same as those of the above-described embodiment structure. However, the structure is not limited to this, and can be modified into various structures. The shape of the caster 5 can be changed to various shapes. In the embodiment described above, the fitting portion 6 of the first mounting shaft 6 is used.
Although a and the fitting portion 9a of the second mounting shaft 9 are formed to be the same, they may be formed to be substantially the same. That is, the first
Fitting portion 6a of mounting shaft 6 and fitting portion 9a of second mounting shaft 9
Even if the shapes of and are slightly changed, if the shape is changed within the range of the fitting interchange allowance provided between the first support member 7A and the second support member 7B, the first support member 7A and the first support member 7A The mounting shaft 6 and the second support member 7B and the second mounting shaft 9 can be securely fitted and held. In the above-described embodiment, the table that also serves as a kotatsu was described as an example, but the technique of the present invention can be applied to other furniture such as a desk.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an exploded cross-sectional view of a main part of a combined high-priced table showing a first embodiment.

FIG. 2 is an enlarged cross-sectional view of the main part when the extension leg is attached.

FIG. 3 is an enlarged sectional view of a first support member and a first mounting shaft.

FIG. 4 is an exploded cross-sectional view of a main part of a combined high-priced table showing a second embodiment.

[Explanation of symbols]

 1 Top Plate 2 Legs 5 Casters 6 First Mounting Shaft 6a Fitting 7A Supporting Member 7B Supporting Member 8 Extension Leg 9 Second Mounting Shaft 9a Fitting 10 Locking Hole 11 Protrusion 12 Locking Hole

Claims (3)

[Claims] 1. A first mounting shaft (6) provided in a caster (5) in a vertical position is detachably fitted and held on a lower end surface of a leg (2) mounted on a top plate (1). The support member (7A) is embedded, and the upper end surface of the extension leg (8) capable of contacting the lower end surface of the leg (2) is provided with a fitting portion (6a) of the first mounting shaft (6). A second mounting shaft (9) provided with the same or substantially the same fitting portion (9a) is provided so as to project in a vertical posture, and the second mounting shaft (9) of the extension leg (8) and the caster (5). (1) The first mounting shaft (6) of (1) and the supporting member (7A) of the leg (2) are selectively engageable with and held by the furniture leg structure. 2. The upper end surface of the extension leg (8) is formed on the lower surface of the leg (2) when the second mounting shaft (9) is fitted and held by the support member (7A). Locking hole (10)
Projections (11) that are detachably fitted to the upper and lower sides
The leg structure of furniture according to claim 1, wherein the leg structure is provided. 3. A support member (7B) identical to the support member (7A) of the leg (2) is embedded in the lower end surface of the extension leg (8), and the leg (2) is locked. 3. The leg structure for furniture according to claim 2, wherein a locking hole (12) identical to the hole (10) is formed.