KR101240343B1

KR101240343B1 - Desk with rectangular leg frame

Info

Publication number: KR101240343B1
Application number: KR1020120115643A
Authority: KR
Inventors: 김현승
Original assignee: 주식회사 쏘피체
Priority date: 2012-10-17
Filing date: 2012-10-17
Publication date: 2013-03-06

Abstract

PURPOSE: A desk with a rectangular leg frame is provided to enhance the adhesion of an upper plate and reduce the load applied to a bolt coupling unit. CONSTITUTION: A desk with a rectangular leg frame comprises an upper plate(40), a rectangular leg structure(10) which comprises a pair of transverse members and vertical members, a beam member(30) which prevents the edge of the upper plate from sagging, and an upper plate bracket(20) which is connected to the transverse member. The upper plate bracket comprises an upper plate coupling unit, a beam coupling unit, and a leg coupling unit.

Description

Desk with rectangular leg frame {Desk with rectangular leg frame}

The present invention relates to a structure of furniture, and more particularly, to a desk including a frame structure forming a leg of the desk.

In general, the desk consists of a top plate and legs supporting the top plate. Typically, four legs are placed vertically under the top plate, or vertically erected plates that serve as legs on both sides of the top plate have been widely used. However, the structure of the desk permanently coupled legs and top plate is difficult to transport, and even in case of partial breakage, there is a difficulty in replacing the whole.

Recently, knock-down furniture, which can be disassembled and assembled, is in the spotlight. In the case of a desk, a desk having a structure capable of disassembling and assembling a top plate and a frame structure constituting a leg has been proposed. In this knock-down desk, the top plate is mainly made of solid wood or processed wood, and the frame forming the legs is mainly made of metal such as iron. The top plate, the leg frame, and each of the parts constituting the leg frame are generally bolted together.

However, when the adhesion and fastening force of the top plate and the leg frame is weak, the desk may be inferior in stability, such as shaking from side to side or back and forth. In particular, when a torsional load is applied to the desk, a problem is likely to occur in which the load is concentrated on the bolt fastening portion and the fastening portion is damaged.

Various methods may be considered to prevent this problem, but from the producer's point of view, if the shape of the members constituting the bridge frame is complicated or varied, there may be a problem that the efficiency of productivity and supply and demand of the material is inferior.

Korean Unexamined Patent Publication No. 10-2011-0073684

The present invention has been proposed to prevent the above-mentioned problem, and improves the structure of the bridge frame and the connection structure of the parts constituting the bridge frame to improve the adhesion between the bridge frame and the top plate, even when a torsional load is applied to the desk It is an object of the present invention to provide a desk having a square leg frame having a structure capable of reducing the load concentrated on the bolt fastening portion.

In addition, an object of the present invention is to provide a desk having a square leg frame having a structure capable of simplifying the shape and type of the members constituting the leg frame to improve productivity and material supply and efficiency simultaneously.

The desk having a square leg frame according to the present invention for solving the above problems, the desk top plate; A pair of horizontal members arranged in parallel in the width direction of the desk top plate and the same rectangular tubes as the horizontal members, and arranged in a vertical direction so that both ends are connected to the horizontal members. Square leg structure formed of a pair of vertical members; A beam member disposed below the desk top in a longitudinal direction to prevent sagging of the desk top; And an upper plate bracket disposed on a bottom surface of the desk upper plate and fastened to an end of the desk upper plate and the beam member and the horizontal member.

Here, the top plate bracket, the top plate fastening portion of the plate shape that is fastened to the bottom surface of the desk top plate; A beam fastening part protruding below the upper plate fastening part to provide a space into which an end of the beam member is inserted; And a leg fastening part connected to one side of the beam fastening part and protruding obliquely so as to correspond to the inclined surface of the horizontal member to receive a portion of the horizontal member.

The leg fastening portion may be fastened with a bolt and a portion spaced apart from the upper end by a predetermined distance from the oblique surface of the horizontal member. The beam member may face the bottom surface of the desk top plate, and the beam fastening part may be fastened to the beam member by enclosing the remaining portion except for a surface in which the inserted beam member contacts the desk top plate. The beam member may have a rectangular cross section having a long side and a short side, and the long side may be disposed in a direction perpendicular to the desk top plate.

The rectangular tube having a trapezoidal cross section, constituting the horizontal member and the vertical member, has a wide surface outside the square leg structure and a narrow surface inside the square leg structure, and a pair of inclined surfaces connecting the wide surface and the narrow surface. The radius of curvature of the acute angle where the wide surface and the inclined surface meet may be 1.7 times to 2.3 times the thickness of the square tube.

According to the present invention, by improving the structure of the bridge frame and the connection structure of the components constituting the bridge frame to improve the adhesion between the leg frame and the top plate, and to reduce the load concentrated on the bolt fastening portion even when a torsional load is applied to the desk There is.

In addition, by simplifying the shape and type of the members constituting the leg frame there is an effect to improve the productivity and the supply and demand efficiency at the same time.

1 is a perspective view showing a square leg frame of a desk according to an embodiment of the present invention.
2 is an exploded view of the square leg frame of FIG.
FIG. 3A shows the AA ′ cross section of FIG. 1.
FIG. 3B shows the BB ′ section of FIG. 1.
Figure 4 shows the shape of the square leg structure seen from the bottom of the desk of FIG.
5 is a cross-sectional view taken along line CC ′ of FIG. 2.
FIG. 6 is an enlarged view of the broken line portion of FIG. 5.
Figure 7 shows a fastening structure of the upper plate bracket and the horizontal member according to an embodiment of the present invention.
8 is a perspective view of the upper plate bracket according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The technical idea of the present invention can be clearly understood through the examples. In addition, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described below but may be modified in various forms within the scope of the technical idea of the present invention. will be.

1 is a perspective view showing a square leg frame of a desk according to an embodiment of the present invention, Figure 2 shows an exploded view of the square leg frame of FIG. 1 and 2 illustrate a state in which the desk top plate 40 is separated, and fastening means such as bolts for assembly are omitted.

As shown in the figure, the square leg structure 10 has a rectangular shape consisting of a pair of horizontal members 11 and a pair of vertical members 12. Each of the horizontal member 11 and the vertical member 12 is formed of a square tube having a trapezoidal cross section. One of the pair of horizontal members 11 is disposed adjacent to the bottom surface on which the desk is to be placed, and the other one is disposed adjacent to the desk top plate 40 to be parallel to each other. The pair of vertical members 12 are connected to be perpendicular to both ends of the horizontal member 11 so as to support the vertical load applied to the desk top plate 40. The horizontal member 11 and the vertical member 12 may be permanently coupled by a method such as welding, and as another example, both sides are separately fitted to the horizontal member 11 and the vertical member 12, respectively. It may be coupled via a connecting member.

The square leg structure 10 of the above-described form has a structurally strong rigidity against torsional load in the front and rear direction of the desk user, that is, the width direction of the desk top plate 40. This is because the stiffness against torsion increases as the distance between the pair of horizontal members 11 increases. On the other hand, the square leg structure 10 is because the horizontal member 11 and the vertical member 12 is made of the same square tube, in terms of productivity and supply and demand efficiency compared to the case of using different members from the producer position Very advantageous.

The beam member 30 extending in the longitudinal direction is disposed below the desk top plate 40. The beam member 30 may be formed of a square tube having a rectangular cross section. The beam member 30 supports the load applied downward from the middle portion of the desk top plate 40 to prevent sagging. To this end, the beam member 30 may be disposed such that its upper surface is facing the bottom surface of the desk top plate 40 and further contacted directly. The beam member 30 advantageously has a rectangular shape in which its cross section is elongated vertically so that the bending rigidity with respect to the load in the downward direction of the desk is large. That is, the beam member 30 may be formed of a rectangular tube having a rectangular cross section, and the long side of the long side and the short side constituting the cross section may be disposed in a direction perpendicular to the desk top plate 40.

The beam member 30 has an end coupled to the square leg structure 10 through an upper plate bracket 20. The upper plate bracket 20 is fastened by fastening means such as the desk top plate 40, the square leg structure 10, and the beam member 30 and the bolts, respectively, to connect them and a load applied to any one of them. To ensure that they are supported. When a torsional load is applied in the longitudinal direction of the desk top plate 40 to the desk, the beam member 30 transmits a force to the side surface of the horizontal member 11 through the top plate bracket 20 so that the desk is unbalanced. It also helps to ensure that it is not wrong. The shape of the upper plate bracket 20 and the fastening structure through the same will be described later.

On the other hand, the embodiment of Figure 1 shows an example in which the square leg structure 10 is disposed below both sides of the desk top plate 40, one square leg structure 10 is another partition wall, bookshelf, drawer, etc. It may be replaced by a structure.

FIG. 3A illustrates the AA ′ cross section of FIG. 1, and FIG. 3B illustrates the AA ′ cross section of FIG. 1. That is, FIG. 3A shows a cross section of the horizontal member 11 and FIG. 3B shows a cross section of the vertical member 12. As shown in the figure, the horizontal tube 11 and the vertical member 12, the cross-sectional trapezoidal tube is the same as each other, the wide surface (111, 121) and the square leg structure outside the square leg structure The inner narrow surfaces 112 and 122 and a pair of inclined surfaces 113 and 123 connecting the wide surfaces 111 and 121 and the narrow surfaces 112 and 122. The square tube also has a substantially constant thickness t.

Figure 4 shows the shape of the square leg structure seen from the bottom of the desk of FIG. In a portion where the horizontal member 11 and the vertical member 12 meet each other, the surfaces cut in diagonal lines may be welded in a straight line. Therefore, the welding line 115 between the horizontal member 11 and the vertical member 12 has a single straight shape. This is advantageous for improving the productivity by simplifying the welding process. A bolt hole for fastening to the upper plate bracket is formed at a side of the horizontal member 11 disposed adjacent to the upper table of the desk, that is, the part of the inclined surface 113.

5 is a cross-sectional view taken along line C-C 'of FIG. 2, and FIG. 6 is an enlarged view of the chain line portion of FIG. In the horizontal member 11, the radius of curvature of the acute angle where the wide surface 111 adjacent to the desk top plate and the bevel 113 meet may be 1.36 times to 1.64 times the thickness of the square tube based on the outer radius. The small radius of curvature is advantageous to increase the effective area of the wide surface 111 in contact with the top plate bracket, thereby increasing stability against torsion of the desk, whereas when the radius of curvature is too small, the corners become sharp and dangerous to desk users. As this can be a factor, an appropriate radius of curvature is required. In the embodiment of the present invention by applying a cold roll forming process rather than a general drawing process to form a trapezoidal square tube, the acute radius of curvature of the above-described range was realized. As a more specific example, in the case of forming a trapezoidal square tube through a cold roll forming process using a cylindrical pipe having a thickness of 1.1 mm, the radius of curvature of 1.5 mm to 1.8 mm based on the outer radius of the acute portion may be determined. Can be satisfied.

7 is a view showing a fastening structure of the upper plate bracket and the horizontal member according to an embodiment of the present invention, Figure 8 is a perspective view showing the upper plate bracket according to an embodiment of the present invention. The upper plate bracket 20 protrudes below the upper plate fastening portion 23 and the upper plate fastening portion 23 in the form of a plate fastened to the bottom surface of the desk top plate to provide a space for inserting the end of the beam member is inserted. A leg fastening portion 21 connected to one side of the portion 22 and the beam fastening portion 22 and protruding obliquely to correspond to the inclined surface of the horizontal member 11 to receive a portion of the horizontal member 11. Include.

The top plate fastening part 23 may have a plurality of top plate fastening part bolt holes 234 to be firmly fastened to the bottom surface of the desk top plate through the plurality of bolts. The upper plate fastening part bolt hole 234 may be recessed around the hole so that the bolt head and the other structure such as the horizontal member 11 do not come into contact with each other. The beam fastening portion 22 surrounds the remaining portion except for the surface contacting the desk top plate among the surfaces forming the circumference of the inserted beam member, and is fastened with the beam member. The fastening may be made through a fastening means such as a bolt, and a beam fastener bolt hole 224 may be formed for this purpose. The leg fastening portion 21 may be fastened with a bolt and a portion spaced apart from the upper end of the horizontal member 11 by a predetermined distance. To this end, a leg fastening part bolt hole 214 corresponding to the bolt hole 114 of the horizontal surface of the horizontal member 11 is provided.

The leg fastening portion 21 accommodates a portion of the horizontal member 11 having a trapezoidal cross section in a space formed by a flat portion of the upper plate fastening portion 23 and a portion protruding obliquely from the upper plate fastening portion 23. The bolt is fastened to the horizontal member 11 through the leg fastening part bolt hole 214 so that even when the desk top plate is subjected to a load in the longitudinal direction, the force is not concentrated on the bolt fastening part and the horizontal member ( 11) can be dispersed on the oblique surface. In addition, the leg fastening bolt hole 214 is spaced apart from the desk top fastening portion 23 by a predetermined distance, for example, the rigidity against the longitudinal torsional load of the desk is arranged at intervals of about the height of the beam member Contributes to raising

10: square leg structure 11: horizontal member
12: vertical member 20: top bracket
21: leg fastener 22: beam fastener
23: plate fastening portion 30: beam member
40: desk tops

Claims

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Desk top;
A pair of horizontal members arranged in parallel in the width direction of the desk top plate and the same rectangular tubes as the horizontal members, and arranged in a vertical direction so that both ends are connected to the horizontal members. Square leg structure formed of a pair of vertical members;
A beam member disposed below the desk top in a longitudinal direction to prevent sagging of the desk top; And
A top plate bracket disposed on a bottom surface of the desk top plate and fastened to an end of the desk top plate and the beam member and the horizontal member;
The top plate bracket,
An upper plate fastening portion having a plate shape fastened to a bottom surface of the desk upper plate;
A beam fastening part protruding below the upper plate fastening part to provide a space into which an end of the beam member is inserted; And
It is connected to one side of the beam fastening portion and protrudes inclined to correspond to the inclined surface of the horizontal member to accommodate a portion of the horizontal member, and fastened with a bolt and a portion spaced apart from the upper end by a predetermined distance from the upper surface of the horizontal member A desk having a square leg frame, characterized in that it comprises a leg fastening portion.

The method according to claim 3,
The beam member faces the bottom of the desk top plate,
The beam fastening unit is a desk having a square leg frame, characterized in that the fastening member and the beam member surrounding the remaining portion except the surface contacting the desk top plate inserted.

The method according to claim 3 or 4,
The beam member is a desk having a square leg frame, characterized in that the cross section is a rectangle having a long side and a short side, and the long side is disposed in a direction perpendicular to the desk top plate.

The method according to claim 3,
The rectangular tube having a trapezoidal cross section, constituting the horizontal member and the vertical member, has a wide surface outside the square leg structure and a narrow surface inside the square leg structure, and a pair of inclined surfaces connecting the wide surface and the narrow surface. Done,
And a curvature radius of an acute portion where the wide surface and the inclined surface meet is 1.36 times to 1.64 times the thickness of the square tube.