KR101838804B1 - Apparatus for round corner assembling of furniture - Google Patents

Abstract

In the present invention, the furniture body is rounded to the outside of the corner, the rounded portion is not generated in the inside storage space, and the assembly fastening portion is not exposed to the outside, thereby significantly improving the quality characteristics of the furniture in which the storage function, The present invention relates to a round corner fitting of a furniture.
In order to achieve the above object, according to the present invention, there is provided a round corner fitting of a furniture for rounding corners of a main body of a furniture, wherein upper and lower horizontal plates, left and right vertical side plates are coupled in a rectangular shape, A base member having a width equal to or smaller than the thickness of the horizontal plate and the vertical side plate and integrally formed with the X fixing portion and the Y fixing portion which are coupled to the horizontal plate and the vertical side plate at right angles, The X-fixing part and the Y-fixing part of the base member and the cover member are slidably engaged with each other, and are partially overlapped in one or more sections of the overall length. .

Description

APPARATUS FOR ROUND CORNER ASSEMBLING OF FURNITURE [0002]

In the present invention, the furniture body is rounded to the outside of the corner, the rounded portion is not generated in the inside storage space, and the assembly fastening portion is not exposed to the outside, thereby significantly improving the quality characteristics of the furniture in which the storage function, The present invention relates to a round corner fitting of a furniture.

In the furniture including the cabinet for the bathroom, the horizontal and vertical flat plates 110 and 120 are connected in a rectangular shape, and the rear plate 130 is coupled to the rear plate 130 to form the furniture body 100, And a door (not shown) is provided at the front side (see Fig. 1).

In such a furniture body, the edge portion connecting the horizontal plate and the vertical side plate has been formed in a rectangular shape in the past, but the trend is that the rounding process is taking into consideration the risk of colliding with the edge and aesthetic appeal of the design. .

In this technical field, the corner curved connector 200 of the disclosed technology disclosed in Korean Patent Laid-Open No. 10-2013-0045163 (published on May 3, 2013) (hereinafter referred to as "Prior Art 1" The rail type connecting rods 210A and 210B are fixed to the horizontal plate 110 and the vertical side plate 120 and the slide coupling portion 221 is coupled to the rail type connecting rods 210A and 210B, Shaped rounding members 220 formed on both sides are coupled to each other.

The rail-type connecting rod 210 of the prior art 1 is formed to have a width corresponding to the thickness of the horizontal plate 110 and the vertical side plate 120 of the furniture body, (221) is fitted and assembled.

The prior art 1 200 has a structure in which the rail-shaped connecting rods 210A and 210B are separately formed and both sides of the round rounding member 220 are fitted in the rail-shaped connecting rods 210A and 210B, 200r are required to be large. Thus, rounded portions are formed at four corners including both sides of the floor surface in the storage space of the furniture body.

In this manner, when the round radius 200r of the corner becomes larger than the thickness of the plate material forming the furniture main body, inclined or rounded portions are generated at four corners including both sides of the bottom surface in the storage space of the furniture main body , This portion has a disadvantage in that it becomes a dead space (S1) in which it is difficult to stably place the object, thereby deteriorating the storage efficiency, which is an inherent characteristic of the furniture.

In addition, because of the rail-shaped connecting rods 210A and 210B, a step is formed inside and outside the bottom corners of the storage space.

Such a step may cause inconvenience in the use of the storage space, deteriorate design aesthetics, and cause a corner where foreign substances such as dust are caught.

In addition, in the prior art 1 (200), since the rail-type connecting rods 210A and 210B are formed by two members, the number of parts is increased while the productivity of the slide assembly operation is lowered .

As shown in FIG. 8, in Korean Patent Publication No. 20-2010-0003746 (published on Apr. 08, 2010) (hereinafter referred to as "Prior Art 2"), which is compared with the prior art 1, The coupling pieces 311 and 312 are formed at right angles to the corners of the fan-shaped body 310. The coupling pieces 311 and 312 are coupled to the horizontal plate 110 And the vertical side plate 120, as shown in Fig.

Since the radius of the fan-shaped body 310 is formed to correspond to the thickness of the plate material, the round portion as in the prior art 1 is not formed in the storage space, and the portion except for the coupling piece has a flat surface .

Accordingly, even if the outside of the furniture has a round shape, the furniture body has an advantage that the loss of the storage space is minimized because the round portion is not formed in the storage space.

However, the prior art 2 300 has a structure in which the engaging pieces 311 and 312 are fixed by using screws 320 in the receiving space, so that the engaging pieces 311 and 312 are screw- Thickness and width of the coupling pieces 311 and 312, and the coupling pieces 311 and 312 having such a large size are exposed to the storage space while being in a screwed state.

 In the prior art 2 in which the engagement piece is exposed at the corner of the storage space as described above, as in the prior art 1, a step is formed in the storage space and the screw fastening is exposed, There is a problem in that a corner portion of a corner where the foreign matter such as dust falls is additionally generated.

On the other hand, as described above, in the furniture main body, a thick plate 130 is coupled to the upper and lower water level plates 110 and the rear side of the left and right vertical side plates 120. In order to assemble the thick plate, And the vertical plates are assembled by forming grooves 110a and 120a to be fitted to the vertical plates respectively and the thick plates 130 are positioned approximately 10 mm inward from the rear end of the furniture body 2).

Due to the assembling structure of the thick plate, the thick plate 130 protrudes from the horizontal plate and the side plate which are joined at the corner portions.

In the prior art 1 (200), due to the protrusion of the thick plate, the rail connecting rods 210A and 210B are provided only to the front of the thick plate and the rear member of the rounding member is opened by engaging the rounding member 220 .

In other words, the rail-type connecting rods 210A and 210B are installed only up to the portion before the thick plate position in the entire length of the corners, so that the rounding members are floating in the air in some sections of the rear and the thick plate 130 is seen to be seen, .

Korean Patent Publication No. 10-2013-0045163 (published on Mar. 05, 03, 2013) Korea Public Practice No. 20-2010-0003746 (Published on Apr. 08, 2010) Korean Patent No. 10-0870203 (published on Nov. 25, 2008)

The present invention has been made to solve the above problems,

An object of the present invention is to provide a cabinet which is capable of preventing a rounded portion from being generated in an inner storage space while preventing the outer periphery of a furniture body from being rounded while preventing the assembled fastening portion from being exposed to the outside, And to provide a round corner fitting of the furniture which significantly improves.

It is still another object of the present invention to provide a round corner fitting of a furniture which allows the corner fittings to be neatly finished to the rear end so as to improve the quality and quality of the furniture.

It is a further object of the present invention to provide a round corner fitting of a furniture which prevents the edges of the furniture body from being rounded to prevent dust from being caught in corner corners, .

It is still another object of the present invention to provide a round corner fitting of a furniture for preventing assembly after being assembled so as to improve the degree of assembly.

Still another object of the present invention is to remarkably reduce the number of parts and dramatically shorten a slide assembly section to improve productivity.

According to an aspect of the present invention,

In a round corner fitting of a furniture for rounding corners of a main body of a furniture in which upper and lower horizontal plates, left and right vertical side plates are joined in a quadrangular shape, and a rear plate is coupled to the rear,

A base member having a width equal to or smaller than the thickness of the horizontal plate and the vertical side plate and having an X fixing portion coupled to the horizontal plate and the vertical side plate and a Y fixing portion formed at a right angle,

And a cover member coupled to the base member to cover the base member and having a curved corner,

The X-fixing portion and the Y-fixing portion of the base member and the cover member are slidably engaged with each other, and the X-fixing portion and the Y-fixing portion of the base member partially overlap each other over one interval.

According to an embodiment of the present invention, the X-fixing portion and the Y-fixing portion of the base member are each provided with at least one insert piece for slide-engagement with the cover member, Grooves are formed and coupled with each other.

According to an embodiment of the present invention, at least one fixing hole is formed in the X-fixing portion and the Y-fixing portion of the base member, respectively, to be fastened to the front end face of the horizontal plate or the vertical side plate of the furniture body using fastening means, The fixing hole is formed at a position deviated from the fitting piece.

According to an embodiment of the present invention, the cover member may have a shape of a cross section of an arc-like or arcuate shape and may be connected to the inside of the body to form the fitting groove, Or more,

The base member has an X-fixing portion and a Y-fixing portion in the shape of a cross-section, and a fitting groove for inserting the fitting portion into the X-fixing portion and the Y-fixing portion is formed together with the fitting portion.

According to an embodiment of the present invention, the base member may include a plate member guide protruding from a right angle corner where the X fixing portion and the Y fixing portion meet to mount the horizontal plate or the vertical side plate at right angles, A convex round is formed toward the storage space.

According to one embodiment of the present invention, the cover member is formed with a front edge for covering the front of the base member on the entire surface of the body in the shape of a circular arc or a circular arc, the base member having a cover member A stopper for guiding the assembly position and a rear waist for covering the rear of the cover member at the rear, and at least one reinforcing bar for connecting and reinforcing the X fixing part and the Y fixing part in the inside and supporting the cover member .

According to an embodiment of the present invention, the base member is formed with a thick plate insertion groove for inserting a thick plate of the furniture body over the X fixing portion and the Y fixing portion,

An assembly guide for guiding the assembly position of the upper plate or the side plate is formed on at least one of the X fixing portion and the Y fixing portion in the thick plate insertion groove.

According to an embodiment of the present invention, the base member and the cover member are formed with concave-convex locking portions that are joined together and prevented from being separated.

According to an embodiment of the present invention, the cover member is provided with a sleeve for covering the tip of the horizontal plate and the vertical side plate.

According to the present invention, the outer edge of the furniture body is rounded through the structure in which the base member and the cover member are partly slidably engaged with each other in the entire length of the corner, And at the same time, there is a remarkable effect of improving the quality characteristics of the furniture in which the assembly function is not exposed to the outside, and the design beauty and safety are important.

In addition, since the base plate is provided with the thick plate insertion groove, the base member can be installed over the whole length of the corner of the furniture body, and the rear edge is formed at the end of the base member to be coupled to the rear end of the cover member. So that the completeness and quality of the furniture can be remarkably improved.

Also, the plate member guide of the base member guiding the right-angled assembly of the horizontal plate and the vertical side plate has no space loss such as encroaching the storage space of the furniture body, and the corner portion is formed into a convex round toward the storage space, It has a remarkable effect of preventing the dust from being caught in the corner by filling the rectangular groove of the storage space roundly.

Further, since the base member and the cover member are provided with the concave-convex locking portion, there is an advantage that the release is prevented after assembly

Also, since the X fixing portion and the Y fixing portion are integrally formed on one base member, the number of parts is reduced, and the slide assembly is partially formed over the entire length, thereby reducing the material cost and the assembling workability, thereby improving the productivity.

1 is a partially enlarged perspective view of a furniture main body to which a round corner fitting of a furniture according to an embodiment of the present invention is applied;
Fig. 2 is an exploded perspective view of one side edge of Fig. 1 showing the structure of the base member and the cover member according to the present invention. Fig.
FIG. 3 is a partially exploded perspective view showing an inner configuration of a cover member according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view taken along line AA in Fig.
Fig. 5 is an enlarged cross-sectional view taken along line BB of Fig.
Fig. 6 is a perspective view of the base member of Figs. 2 and 3,
7 is a partially enlarged cross-sectional view showing the configuration of the prior art 1
8 is a partial cross-sectional view showing the configuration of the prior art 2

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a round-corner fitting of a furniture according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, a round corner fitting 1 of a furniture according to an embodiment of the present invention includes a top plate 111, a horizontal plate 110 of the bottom plate 113, 121 of the furniture main body 100 and the vertical side plate 120 of the right side plate 123 are joined in a rectangular shape and the rear plate 130 is joined to the rear side, The X-fixing part 10X and the Y-fixing part 10Y, which have a width equal to or smaller than the thickness of the horizontal plate 110 and the vertical side plate 120 and are coupled to the horizontal plate and the vertical side plate, And a cover member (30) joined to the base member in a form to cover the base member (10) and having a curved surface at an edge, wherein the X fixing portion 10X and the Y fixing portion 10Y and the cover member 30 are slidably engaged with each other, This is done in more than one section.

The X-fixing part 10X and the Y-fixing part 10Y of the base member are each provided with at least one insertion piece 11 for sliding engagement with the cover member 30, and the cover member 30 The fitting groove 31 corresponding to the fitting piece 11 is formed and can be slidably engaged with each other.

For example, in the case of a general bathroom cabinet, the width of the top plate and the side plate is about 150 mm and the thickness is about 15 mm. Accordingly, when the cabinet of the present invention is manufactured for a bathroom cabinet, The length of the fitting piece 11 and the fitting groove 31 may be about 5 mm.

In other words, the sliding engagement of the base member 10 and the cover member 30 can be partially performed in an extremely short section of the entire length.

As shown in Figs. 2 to 4, the sliding engagement of the fitting piece 11 and the fitting groove 31 is performed in the forward, rearward, and intermediate portions of the entire length of the base member 10 and the cover member 30 Lt; / RTI >

The X fixing part 10X and the Y fixing part 10Y of the base member are respectively fastened to the front surface of the horizontal plate 110 or the vertical side plate 120 of the furniture body using fastening means 20 At least one fixing hole 16 is formed and the fixing hole 16 can be formed at a position shifted from the fitting piece 11 (see FIG. 2).

When the fastening means such as a piece is fastened to the fixing hole 16 in a state where the X fixing part 10X and the Y fixing part 10Y of the base member are structurally thin and narrow in structure, There is a problem that deformation is caused by the tightening pressure of the head of the piece and the sliding engagement becomes difficult.

For example, when the fixing holes and the rail portions are formed in the same region in the X fixing portion 10X and the Y fixing portion 10Y, respectively, the head of the piece during the fastening of the fastening means 20 strongly presses the fixing portion, The base member made of a resin material deforms around the fastening portion, thereby making it difficult to slide the cover member 30 in the end.

As shown in Fig. 2, when the fastening means 20 is fastened to the X fixing portion 10X and the Y fixing portion 10Y in the same manner as the fastening means 20 such as a piece is fastened to the fixing hole 16, It is preferable that the fasteners are fastened in a zigzag position in order to prevent interference between the pieces at the fastening step of the thin and narrow fastener, as described above.

The cover member 30 is a body 30A having a cross section of an arc-like or arcuate shape. The cover member 30 is connected to the inside of the body to form the fitting groove 31, The X-fixing part 10X and the Y-fixing part 10Y are formed in the shape of a "? "In cross section, and the X-fixing part 10X and the Y- The fitting insert groove 12 for inserting the fitting insert 32 and the fitting piece 11 may be formed together.

As described above, the base member 10 and the cover member 30 are coupled to each other through the fitting piece 11, the fitting groove 31, the fitting insertion groove 12 and the fitting fitting 32, .

It will be appreciated by those skilled in the art that the fitting piece 11 may be formed on the cover member 30 and the fitting groove 31 may be formed on the base member 10. [

The fitting piece 11 and the fitting groove 31 may be formed along the direction orthogonal to the X fixing portion 10X and the Y fixing portion 10Y, respectively.

5, the engaging pieces 11 formed at the ends of the X fixing portions 10X and the Y fixing portions 10Y are formed to have a rectangular shape in cross section along the respective directions, The grooves 31 are formed correspondingly to further strengthen the assembly of the base member and the cover member.

The base member has a plate member guide 17 for guiding the perpendicular mounting of the horizontal plate 110 or the vertical side plate 120 to a rectangular corner where the X fixing unit 10X and the Y fixing unit 10Y meet, And the plate guide 17 is preferably formed into a convex round toward the storage space of the furniture main body.

The plate guide 17 is for holding the leading edge of the horizontal plate 110 and the vertical side plate 120. The plate guide 17 can sufficiently perform its function only by a protrusion of about 2 to 3 mm, There is no space loss such as encroaching the storage space of the furniture body, and the corner portion is convex round formed toward the storage space, so that it is beautiful in design. The convex round corner fills the right corner of the storage space roundly, (See Figs. 2, 3, and 5).

The cover member 30 is formed with a front edge 34 for covering the front of the base member 10 on the entire surface of a body 30A having a circular or arcuate cross section, 10 has a stopper 13 for guiding the assembling position of the cover member 30 to the front and a rear waist region 14 for covering the rear of the rear cover member 30, One or more ribs 15 for connecting and reinforcing the cover member 30 and the Y fixing portion 10Y may be formed (see FIGS. 2 and 3).

The base member 10 is formed with a thick plate insertion groove 18 for inserting the thick plate 130 of the furniture body over the X fixing portion 10X and the Y fixing portion 10Y, The assembly guide 19 for guiding the assembly position of the upper plate 110 or the vertical side plate 120 may be formed on at least one of the X fixing portion and the Y fixing portion 18 ).

As described above, the base plate 10 is provided with the thick plate insertion groove 18 so that the base member 10 can be installed to the rear end of the edge beyond the thick plate 130 of the furniture body.

The assembly guide 19 is inserted into the upper plate 110 and the vertical plate 120 and formed in the plate insertion slots 110a and 120a to accurately determine and guide the assembly position of the upper plate and the vertical plate.

The base member 10 and the cover member 30 may be provided with concave and convex locking portions 10b and 30b, which are joined together to prevent detachment.

The concave and convex locking portions 10b and 30b are provided with a concave and convex locking recess in the rear waist region 14 of the base member and a concave and convex locking protrusion formed at the rear end of the body of the cover member 30, L are formed so as to be prevented from being separated after assembly (see Figs. 3 and 5).

It is preferable that the cover member 30 is provided with a sleeve 35 for covering the tip of the horizontal plate 110 and the vertical side plate 120.

The sleeve 35 covers an assembly line between the horizontal plate and the vertical side plate 120 and the round corner fitting hole 1 to provide a beautiful appearance and prevent a gap from being formed.

The operation state of the round corner fitting 1 of the furniture according to the present invention having such a configuration will be described below.

The present invention is characterized in that the X fixing portion 10X and the Y fixing portion 10Y of the base member 10 are formed in a "C" shape corresponding to the thickness of the horizontal plate 110 and the vertical side plate 120 of the furniture body By joining the cover member 30, which is integrally formed at a right angle and formed with curved corners, the outer edge of the furniture body 100 is rounded to enhance the appearance and to improve the safety due to corner bumps The inclination or the round portion is not generated in the storage space, and the storage efficiency, which is the original function of the furniture, is enhanced.

As described above, for example, in the case of a general bathroom cabinet, since the width of the upper and side plates is about 150 mm and the thickness is about 15 mm, the base member 10 and the cover member 30, the total length is about 150 mm, and the widths of the X-fixing portion 10X and Y-fixing portion 10Y of the base member 10 can be about 15 mm.

When the X fixing part 10X and the Y fixing part 10Y are integrally formed in the form of a "C" shape having a length of 150 mm and a width of 15 mm, the horizontal plate 110 or the vertical side plate 120 The X fixing part 10X and the Y fixing part 10Y have to be thin.

In the structure in which the slide engagement is performed over the entire length of 150 mm in such a thin thickness, the present invention is configured such that the slide engagement is not made over the entire length, but is formed only partially by the fitting piece 11 and the fitting groove 31 And at the same time, the fitting piece 11 is formed at a position displaced from the fixing hole 16, so that the occurrence of defective products can be reduced, and the assembling property and the productivity can be remarkably improved.

If the slide rail portion is formed over the entire length of the corner of the furniture body assuming the X fixing portion 10X and the Y fixing portion 10Y having the narrow width and the thin thickness as described above, It is difficult to assemble and productivity can not be obtained.

In the injection molding process, even if it is manufactured as a genuine product without such deformation, the fastening means 20 such as a piece is fixed to the fixing hole 16 of the X fixing portion 10X and the Y fixing portion 10Y of the base member, The head of the piece strongly presses the fastening portion when fastening, and such a pressure causes deformation of the base member 10 made of resin and pushing the fitting insertion groove 12 side.

Such deformations break the slide coupling structure in which the mutually corresponding dimensional ranges must be strictly ensured, making it difficult to assemble.

In the present invention, this difficulty is overcome through the structure in which the fitting piece 11 is partially formed so as to be shifted from the position of the fixing hole 16 in the entire length of the base 10, as described above.

The fixing function of the base member 10 with respect to the furniture body 100 is ensured through the coupling structure in which the fitting piece 11 is partially formed at a position where the fitting member 11 does not interfere with the fastening of the fastening means, And the cover member 30 are smoothly engaged with each other, so that the outside of the corner of the furniture body is rounded, the rounded portion is not generated in the inside storage space, and the assembled fastener is not exposed to the outside, To provide furnished furniture.

In addition, the base plate 10 is provided with the thick plate insertion groove 18 so that the base member 10 can be installed over the whole length of the edge of the furniture body 100 and the rear edge 14 is formed at the end thereof And is joined to the rear of the cover member (30), thereby providing a clean and complete finish to the rear, thereby improving the completeness of the furniture.

In addition, since the protrusive locking portions 10b and 30b are formed at the rear end portions of the base member 10 and the cover member 30, it is possible to prevent the detachment after assembling, thereby further improving the completeness of assembly.

In addition, the X fixing portion and the Y fixing portion are integrally formed on one base member 10 to reduce the number of parts and slide assembly is partially formed in the whole length, thereby reducing the material cost and the assembling workability, thereby improving the productivity.

As described above, the round corner fitting 1 of the furniture according to the present invention has a structure in which the base member and the cover member are partly slidably coupled to each other, and the outside of the corner of the furniture body is rounded. It is an excellent technology for industrial use because it significantly improves the quality characteristics of the furniture which is important for the storage function, the design beauty, and the safety.

1: Round corner fitting of the furniture according to the invention
10: base member 10X: X fixing portion 10Y: Y fixing portion
10b: protruding locking part 11: fitting part 12: fitting part insertion groove
14: rear edge 15: reinforcing bar 17: plate guide
18: Heavy plate insertion groove 19: Assembly guide 30: Cover member
30A: body 30b: concave / convex locking part 31:
32: insert 34: front end 35: sleeve
100: furniture body 110: horizontal plate 120: vertical side plate
130: Plate 200: Prior art 1 300: Prior art 2

Claims (9)

A round corner of the furniture for rounding the edges of the furniture body 100 formed by combining the horizontal and vertical flat plates 110 and the left and right vertical side plates 120 in a rectangular shape and the rear plate 130 being coupled thereto, In the bonding portion,
The X-fixing portion 10X and the Y-fixing portion 10Y, which have a width equal to or smaller than the thickness of the horizontal plate 110 and the vertical side plate 120 and which are coupled to the horizontal plate and the vertical side plate, The base member (10) and the base member
And a cover member (30) coupled to the base member to cover the base member (10) and having a curved surface at a corner,
The X fixing part 10X and the Y fixing part 10Y of the base member and the cover member are slidably engaged with each other,
The X-fixing part 10X and the Y-fixing part 10Y of the base member are each provided with at least one insertion piece 11 to be slidably engaged with the cover member 30, Fitting grooves 31 corresponding to the fitting pieces 11 are formed and coupled with each other,
The cover member 30 is a body 30A having a cross section of an arc-like or arcuate shape. The cover member 30 is connected to the inside of the body to form the fitting groove 31, The fittings 32 are formed,
The X-fixing part 10X and the Y-fixing part 10Y of the base member 10 are formed in a "C" shape in cross section, and the fitting part 32 is inserted into the X- Wherein the fitting insert groove (12) and the fitting piece (11) are formed together. delete The method according to claim 1,
The X fixing part 10X and the Y fixing part 10Y of the base member are respectively provided with at least one member for fastening the front end face of the horizontal plate 110 or the vertical side plate 120 of the furniture body using the fastening means 20, Wherein a fixing hole (16) is formed in the fixing hole (16), and the fixing hole (16) is formed at a position displaced from the fitting piece (11). delete The method according to claim 1,
The base member is formed with a plate guide 17 for guiding the perpendicular mounting of the horizontal plate 110 or the vertical side plate 120 to a rectangular corner where the X fixing part 10X and the Y fixing part 10Y meet, Characterized in that the plate guide (17) is formed in a rounded shape toward the storage space of the furniture body. The method according to claim 1,
The cover member 30 is formed with a front edge 34 for covering the front of the base member 10 on the entire surface of a body 30A having a circular or arcuate cross section,
A stopper 13 for guiding the assembling position of the cover member 30 is formed on the front surface of the base member 10 and a rear waist region 14 for covering the rear of the rear cover member 30, And at least one reinforcing bar (15) for connecting and reinforcing the X fixing part (10X) and the Y fixing part (10Y) to receive the cover member (30) is formed. The method according to claim 1,
The base member 10 is formed with a thick plate insertion groove 18 for inserting the thick plate 130 of the furniture body over the X fixing portion 10X and the Y fixing portion 10Y,
And an assembly guide (19) for guiding the assembly position of the upper plate or the side plate is formed on at least one of the X fixing portion and the Y fixing portion in the thick plate insertion groove (18). The method according to claim 1,
Wherein the base member (10) and the cover member (30) are formed with concave and convex locking portions (10b) and (30b) to be detached from each other. The method according to claim 1,
Characterized in that the cover member (30) is provided with a sleeve (35) for covering the edge of the horizontal plate (110) and the vertical side plate (120).

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