JP4172853B2 - Assembled shelf - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a prefabricated shelf.
[0002]
[Prior art]
Conventionally, various assembling-type shelves have been proposed. For example, in Japanese Utility Model Publication No. 5-35711, as a shelf board, a rectangular box-shaped plate is used to stand on the same side to form a shallow box, and short plates are fixed to the four corners of the plate, A shelf plate fixing member is inserted into the gap between the short cylinder of the shelf plate and the column, and the shelf plate fixing member includes two portions whose inner surface is in close contact with the column and surrounds the column and whose outer surface has a truncated cone shape. In addition, a pin protrudes into the hole provided in the support column on the inner surface, and the short cylinder has a frustoconical surface that is symmetrical on both ends and narrows toward the back. A shelf board is disclosed in which the inner frustoconical surface is in close contact with the large-diameter portion of the outer frustoconical surface of the shelf fixing member.
[0003]
[Problems to be solved by the invention]
However, the shelf board described in the Japanese Utility Model Publication No. 5-35711 has a feature that it can be used even when the shelf board is turned upside down, and the inside of the short cylinder of the shelf board, the shelf board fixing member, Therefore, the shelf board is not stable and the shelf board is not sufficiently fixed to the support column. Further, the shelf plate fixing member is fixed to the column only by inserting two pins into the column holes, and the stability of the shelf plate fixing member is also low.
[0004]
Accordingly, an object of the present invention is to provide an assembly-type shelf in which the shelf board can be used regardless of which side of the stacked portion of the shelf board is placed, and the shelf board is highly stable. .
Another object of the present invention is to provide an assembly-type shelf capable of firmly fixing a shelf stopper to a support in addition to the above characteristics.
[0005]
[Means for Solving the Problems]
The present inventor shall use the shelf board regardless of whether both sides are up when the inner surface of the receiving hole portion of the shelf board and the outer surface of the cylindrical shelf board stopper are made into a specific structure in the assembly-type shelf. And the present invention was completed by finding that the shelf board has high stability. That is, the present invention comprises a shelf plate and a support column that is fitted to the inner surface of the receiving hole portion of the shelf plate via a cylindrical shelf plate stopper and supports the shelf plate,
The shelf hole of the shelf plate has a substantially polygonal inner surface in cross section, each inner surface of the substantially polygonal shape forms a tapered surface in the vertical direction, and the tapered surface of each inner surface is in the circumferential direction. The downward taper surface and the upward taper surface are alternately repeated,
The shelf stopper is configured to be externally mounted at a desired position of the support column, and an outer peripheral surface thereof has an upward tapered surface and a downward tapered shape that are opposite to the tapered surface of the receiving hole portion of the shelf plate. And the surface is alternately repeated in the circumferential direction,
The shelf board is fixed to the shelf board stopper externally mounted on the support column at a desired position by a wedge action between the tapered surface of the inner surface of the receiving hole of the shelf board and the tapered surface of the outer surface of the shelf board stopper. It is an assembly-type shelf characterized by.
[0006]
In the assembly-type shelf of the present invention, the length of the tapered surface of the shelf stopper is the same as the length of the cylinder, and the length of the cylinder shelf stopper is used to stably hold the shelf. It can be adjusted to have a sufficient length. Therefore, in the assembly-type shelf of the present invention, the shelf board is held by the entire tapered surface of the shelf board stopper, so the shelf board is highly stable, and the shelf board is firmly fixed to the column via the shelf board stopper. .
[0007]
Further, in the present invention, the receiving hole portion of the shelf plate is configured by an inner surface having a substantially polygonal cross section, and each inner surface of the approximately polygon forms a tapered surface in the vertical direction, and the inner surface is tapered. The surface is configured by alternately repeating a downward taper surface and an upward taper surface in the circumferential direction, and the shelf stopper has a configuration corresponding to the receiving hole portion of the shelf plate. The loading part can be aligned with the receiving hole part and the shelf stopper regardless of which side of the both sides are facing up. A shelf board can be used.
[0008]
In this invention, it is preferable that the taper surface of the inner surface of the receiving hole part of a shelf board and the taper surface of the outer surface of a shelf board stopper are each flat. If both sides are flat, both the receiving hole portion of the shelf board and the shelf board stopper can be easily manufactured, and the cost can be reduced.
[0009]
In a preferred aspect of the present invention, the tapered surface of the inner surface of the receiving hole portion of the shelf board and the tapered surface of the outer surface of the shelf board stopper are each configured by at least four surfaces. If the inner surface of the receiving hole portion of the shelf plate and the outer surface of the shelf plate stopper each have at least four tapered surfaces, the shelf plate can be more firmly fixed and held on the column.
[0010]
Moreover, it is preferable that the width | variety of the taper surface of the inner surface of the receiving hole part of a shelf board and the taper surface of the outer surface of a shelf board stopper becomes narrow toward an inclination direction. If it has such composition, a shelf board can be fixed still more firmly to a support, and stability of a shelf board can be raised further. That is, when the upward tapered surface is wide in the downward direction, the shelf plate is not only held by the surface of the tapered surface of the shelf stopper, but is also held by the width of the tapered surface. Therefore, the shelf board can be further fixed and stabilized.
[0011]
Furthermore, in this invention, it is preferable that the shelf board stopper is a detachable split structure. As described above, when the shelf stopper has a detachable structure, the shelf stopper can be appropriately mounted on the target place of the support column.
[0012]
In a preferred aspect of the present invention, in particular, the outer surface of the support column is provided with a recess in the axial direction, and the shelf plate stopper is provided with a protrusion that fits into the recess of the support column. . If it has such a structure, a shelf board stopper can be easily attached to a support | pillar and can be removed easily.
[0013]
Further, when the concave portion of the column is a circumferential groove and the convex portion on the inner surface of the shelf stopper is a protrusion, the shelf stopper can be more firmly fixed to the column. In particular, if the shelf stopper is provided with a projection that fits into at least two of the recesses of the column, the shelf stopper can be more firmly fixed to the column.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in more detail with reference to the drawings.
[0015]
FIG. 1 is a schematic view showing an embodiment of the assembly-type shelf according to the present invention. In the figure, 1 is an assembly-type shelf, 2 is a shelf board, 30 is a loaded portion of the shelf board 2, 31 is one surface of the loaded section 30 of the shelf board 2, 32 is a side surface of the shelf board 2, and 4 is a shelf. The receiving hole part 5 of the board 2 is a shelf board stopper, 6 is a support | pillar. The shelf board 2 includes a flat surface 31, a side surface 32, and a receiving hole portion 4. The inner surface of the receiving hole portion 4 is configured by an inner surface having a substantially polygonal cross section, and each inner surface of the approximately polygonal surface forms a tapered surface in the vertical direction, and the tapered surface of each inner surface is in the circumferential direction. A downward taper surface and an upward taper surface are alternately repeated. The shelf stopper 5 is configured to be externally mounted at a desired position of the support column 6, and an outer peripheral surface thereof has an upward tapered surface and a downward facing taper opposite to the tapered surface of the receiving hole portion 4 of the shelf plate 2. The tapered surfaces are alternately repeated in the circumferential direction. The support 6 is formed of a cylinder.
[0016]
In such an assembly-type shelf 1, the shelf stoppers 5 are externally mounted on the four columns 6 at desired positions, the columns 6 are inserted into the receiving holes 4 of the shelf 2, and the receiving holes 4 are arranged on the shelf. The assembled shelf 1 can be assembled by fitting with the plate stopper 5, fitting the shelf 2 to the column 6 via the shelf stopper 5, and supporting the shelf 2 to the column 6. In the assembled shelf 1, the shelf 2 is placed on a shelf stopper 5 that is externally mounted on the column 6 at a desired position, and a taper surface on the inner surface of the receiving hole 4 of the shelf 2 and a taper on the outer surface of the shelf stopper 5. It is fixed by the wedge action between the faces.
[0017]
(Shelf board stopper)
FIG. 2 is an enlarged schematic view of the shelf stopper 5 in FIG. The shelf stopper 5 according to FIGS. 1 and 2 is cylindrical, has a detachable split structure, and has a split structure of two parts. 2 (a) is a schematic view of the shelf stopper as viewed from above, FIG. 2 (b) is a schematic view of the shelf stopper as viewed from the side, and FIG. 2 (c) is a schematic view of the shelf stopper. It is the schematic seen from diagonally upward direction, FIG.2 (d) is the schematic which looked at the shelf stopper from the downward direction. In FIG. 2, reference numeral 51 denotes one split part of the shelf board stopper 5 that is divided into two, and 52 denotes the other split part of the shelf board stopper 5 that is divided into two parts. Reference numeral 510 denotes an inner surface of the split portion 51, 511 denotes an outer surface of the split portion 51, 512 denotes an outer surface of the split portion 51, 513 denotes an outer surface of the split portion 51, 514 denotes an outer surface of the split portion 51, and 515 denotes an outer surface of the split portion 51. It is the outside. 520 is an inner surface of the split portion 52, an outer surface of the 521 split portion 52, an outer surface of the 522 split portion 52, an outer surface of the 523 split portion 52, an outer surface of the 524 split portion 52, and an outer surface 525 of the split portion 52.
[0018]
The radius of the inner surface 510 of the split portion 51 is substantially the same as the radius of the outer surface of the support column 6, and the split portion 52 has the same shape as the split portion 51. The outer surface of the column 6 is covered by the split portion 52. That is, it is possible to cover the column 6 by covering the split part 51 and the split part 52 from both sides, and to cover the column 6 with the shelf stopper 5 formed by the split part 51 and the split part 52.
[0019]
In the split portion 51, the outer surface 511 is an upward tapered surface, the outer surface 512 is a downward tapered surface, 513 is an upward tapered surface, 514 is a downward tapered surface, and 515 is an upward tapered surface. is there. In the split portion 52, the outer surface 521 is an upward tapered surface, the outer surface 522 is a downward tapered surface, 523 is an upward tapered surface, 524 is a downward tapered surface, and 525 is an upward tapered surface. Surface. In the split plate 51 and the split portion 52, in the shelf stopper 5 in which both split portions (51, 52) are combined, the outer surface 511 and the outer surface 521 form one upward tapered surface, and the outer surface 515 and the outer surface 525 One upward tapered surface is formed.
[0020]
In FIG. 2, reference numeral 5131 denotes a side surface on the tapered surface 514 side of the upward tapered surface 513. Reference numeral 5231 denotes a side surface on the tapered surface 524 side of the upward tapered surface 523. Thus, the upward tapered surface has a lower height in the upward direction. On the other hand, the downward tapered surface has a lower height in the downward direction. Therefore, the upper part of the upward taper surface and the upper part of the downward taper surface have substantially the same height, but the lower part of the upward taper surface and the lower part of the downward taper surface are different in height, The lower portion of the taper surface is higher, and the upward taper surface has a side surface formed on the downward taper surface side. That is, the thickness of the shelf stopper is substantially the same between the upper part of the upward taper surface and the upper part of the downward taper surface, but is different between the lower part of the upward taper surface and the lower part of the downward taper surface. The thickness at the lower portion of the surface is thicker than the thickness at the lower portion of the downward taper surface, and accordingly, a side surface is formed on the lower side of the upward taper surface.
[0021]
The outer surface of the shelf stopper 5 according to FIG. 2 is an octagon. In the present invention, the shape of the outer surface of the shelf stopper is not particularly limited as long as it is a substantially polygonal shape, but is preferably composed of at least four surfaces. FIG. 3 is a schematic view showing another form of the shelf board stopper. As the cross-sectional shape of the shelf stopper, for example, a square as shown in FIG. 3A, a regular polygon such as a hexagon as shown in FIG. 3B, or five vertices as shown in FIG. Examples thereof include a star shape and a jagged shape such as a star shape having six vertices as shown in FIG. Of course, even in these shapes, the outer surface of the shelf stopper is configured by alternately repeating an upward taper surface and a downward taper surface.
[0022]
In the present invention, the tapered surface of the shelf board stopper may be a spherical surface, but is preferably a flat surface. That is, in the present invention, the shelf stopper is preferably configured by alternately repeating an upward tapered surface by a plane and a downward tapered surface by a plane in the circumferential direction.
[0023]
Moreover, in this invention, it is preferable that the width | variety of the taper surface of a shelf board stopper becomes narrow toward the inclination direction (direction in which height becomes low). Therefore, it is preferable that the upward tapered surface has a narrow width in the upward direction, and the downward tapered surface has a narrow width in the downward direction.
[0024]
The shelf stopper is preferably a split structure. In this case, the shelf stopper may be a split structure that is at least divided into two. Therefore, it may be a split structure that is divided into three or four. A preferred split structure is a split structure with two parts. In FIG. 2, a concave portion 516 and a convex portion 526 are formed in each of the two split portions (51, 52) of the shelf board stopper 5 in order to accurately match each other. The upper part of the split part 51 and the upper part of the split part 52 can be exactly matched only by fitting the concave part 516 and the convex part 526 together. Of course, such recesses and protrusions can also be formed on the tapered surface 511 and the tapered surface 521 side.
[0025]
The length of the shelf stopper is not particularly limited, and can be appropriately selected according to the length of the receiving hole portion of the shelf.
[0026]
In addition, the shape of the inner surface of the shelf stopper is not particularly limited, and can be appropriately selected according to the shape of the support column. The inner surface of the shelf stopper is substantially the same shape as the outer surface of the support column, and the shelf stopper is configured to be externally mounted on the support column.
[0027]
The shelf stopper is externally mounted on the column. For this exterior, a method is adopted in which concave portions are provided on the outer surface of the support columns with an interval in the axial direction, and convex portions that are fitted to the recess portions of the support columns are provided on the inner surface of the shelf stopper. It is preferable to do.
[0028]
In the present invention, when the concave portions are provided on the outer surface of the support column at intervals in the axial direction, the inner surface of the shelf stopper is provided with a convex portion corresponding to the concave portion provided on the support column. That is, in the present invention, it is possible to employ a method in which the shelf stopper is externally attached to the support by fitting the recess provided on the outer surface of the support and the protrusion provided on the inner surface of the shelf stopper.
[0029]
As such an exterior method, a method of forming a circumferential groove as a recess on the outer surface of the support column and forming a protrusion corresponding to the circumferential groove of the support column as a projection on the inner surface of the shelf stopper is preferable. . In the method of fitting the circumferential groove and the protrusion, the shelf stopper can be firmly fixed to the support and can be externally mounted. In particular, when the protrusions of the shelf stopper are fitted into a plurality of circumferential grooves (for example, two circumferential grooves) in the support column, the shelf stopper is fixed to the support column and is further externally fixed. Can do. The circumferential groove means a groove provided around the outer surface of the support column.
[0030]
As such a circumferential groove and a protrusion, a structure like FIG. 4 can be illustrated, for example. In FIG. 4, 531 is a protrusion provided on the inner surface of the shelf stopper 5, 532 is a protrusion provided on the inner surface of the shelf stopper 5, 611 is a circumferential groove provided on the support 6, and 612 is a support The circumferential grooves provided at 6, 613, 614 and the like are similar circumferential grooves. In FIG. 4, the ridges (531, 532) of the shelf stopper 5 correspond to two adjacent circumferential grooves of the circumferential grooves (611, 612,...) Of the column 6, and the shelf stopper 5 The protrusions (531, 532) can be fitted into two adjacent circumferential grooves among the circumferential grooves of the support column 6.
[0031]
The shelf stopper can be made of metals (for example, stainless steel, iron, aluminum, etc.), plastics (for example, polypropylene, acrylonitrile-butadiene-styrene copolymer, acrylic resin, etc.) and the like. A preferable material for the shelf stopper is plastics, and particularly hard plastics are preferably used.
[0032]
(Shelf board)
FIG. 5 is an enlarged schematic view of the shelf board 2 in FIG. FIG. 5A is a schematic diagram when one surface 31 of the stacked portion 30 of the shelf 2 is turned up, and FIG. 5B is one surface of the stacked portion 30 of the shelf 2. It is the schematic when 33 is turned up. In the shelf 2 according to FIG. 1 and FIG. 5, 30 is a shelf loading portion, 31 is one surface of the shelf 2 loading portion 30, 32 is a side surface of the shelf 2, and 33 is a shelf 2. The other surface 4 of the loaded portion 30 is a receiving hole portion of the shelf board 2. The shelf board 2 has a box shape having a peripheral wall portion around the surface 33 of the stacked portion 30 of the shelf board 2. Therefore, the one surface 31 of the shelf board and the other surface 33 of the shelf board have a front-rear surface relationship or a top-lower surface relationship in the stacked portion 30 of the shelf plate 2.
[0033]
In FIG. 5, the loaded portion 30 is entirely composed of a single plate, but the structure of the loaded portion is not particularly limited. For example, the stacked portion may be configured in a lattice shape or a mesh shape. The size or area of the loaded portion is not particularly limited.
[0034]
In FIG. 5, the side surface 32 is formed on the shelf board 2, but the presence or absence of the side surface is not particularly limited, and the side surface may not be provided. When the side surface is formed on the shelf board, the height of the side surface is preferably formed to be substantially the same as the cylindrical length of the receiving hole. In FIG. 5, the side surface 32 is assembled with the surface 33 of the loaded portion 30 facing upward to produce the assembly-type shelf 1, and has a function of preventing the load from falling as a peripheral wall of the loaded portion 30. is doing.
[0035]
In FIG. 5, the receiving hole 4 of the shelf 2 is provided at each corner (four corners) of the stacked part 30, but the installation position of the receiving hole is not particularly limited in the present invention. A preferable installation position of the receiving hole portion is each corner of the loaded portion.
[0036]
The receiving hole has a cylindrical shape, and the inner surface has a substantially polygonal cross section as described above. The substantially polygonal shape of the cross section corresponds to the shape of the shelf stopper and can be selected according to the shape of the shelf stopper.
[0037]
In the cylindrical receiving hole portion, each inner surface of the substantially polygonal cross section forms a tapered surface in the vertical direction, and the tapered surface of each inner surface is a tapered surface facing downward in the circumferential direction and an upward tapered surface. And are repeated alternately. The taper surface of the inner surface of the receiving hole 4 corresponds to the taper surfaces (511 to 515, 521 to 525) of the outer surface of the shelf stopper 5, and the two taper surfaces have a reverse taper relationship. The shelf 2 is fixed by the wedge action between the two tapers.
[0038]
The cylindrical length of the receiving hole is not particularly limited, and can be selected according to the maximum load weight of the shelf board, the shape of the shelf board stopper, and the like.
[0039]
The shelf board can be made of metals (for example, stainless steel, iron, aluminum, etc.), plastics (for example, polypropylene, acrylonitrile-butadiene-styrene copolymer, acrylic resin, etc.) and the like. As the material for the shelf board, metals, particularly stainless steel, are preferably used. In the shelf board, the loaded portion, the side surface, the receiving hole portion, and the like may all be formed of the same material, or may be formed of different materials.
[0040]
(Support)
FIG. 6 is an enlarged schematic view of the column 6 in FIG. In FIG. 6, circumferential grooves (611 to 617) are formed in the support column 6 as concave portions. In the support column, the structure of the recess on the outer surface is not particularly limited. However, as described above, when the circumferential groove is employed as the recess, the shelf board stopper can be more firmly attached to the support column. Further, the number of recesses such as a circumferential groove is not particularly limited, and can be selected according to the intended use.
[0041]
The length of the column is not particularly limited, and can be selected according to various uses in the assembly-type shelf. In FIG. 1, the number of support columns is four, but the number of support columns is not limited, and can be selected according to the use of the assembly-type shelf, the number of receiving holes of the shelf plate, and the like.
[0042]
In FIG. 6, the column is a cylinder, but the column may be a column having a substantially polygonal cross section such as a triangular column or a quadrangular column. Of course, the diameter of the pillar of the support is not particularly limited.
[0043]
The support can be made of metals (for example, stainless steel, iron, aluminum, etc.), plastics (for example, polypropylene, acrylonitrile-butadiene-styrene copolymer, acrylic resin, etc.) and the like. The support is preferably made of metal, particularly iron or stainless steel.
[0044]
The assembly shelf of the present invention may be attached with accessories used in the assembly shelf, such as ledges, dividers, side handles, three-way crossbars, ball clamps, metal mats, casters and the like.
[0045]
The assembly type shelf of the present invention is a method similar to the conventional assembly method, i.e., a shelf stopper is externally mounted at a desired position of the column, and the column is inserted into the cylindrical receiving hole of the shelf, The shelf board can be assembled by a method of fixing the shelf board to the column via the shelf board stopper. Therefore, the assembly-type shelf of the present invention has the characteristics that it can be assembled by the same method as the conventional assembly method and the shelf board is highly stable.
[0046]
The shelf of the present invention has high shelf stability, the shelf is firmly fixed to the column, and the shelf can be used regardless of the stacking portion of the shelf. it can. Furthermore, in the present invention, it is possible to further strengthen the fixing of the shelf stopper to the support column. Therefore, the assembled shelf of the present invention is extremely useful.
[0047]
【The invention's effect】
Since the assembly-type shelf according to the present invention has the above-described configuration, the shelf board can be used regardless of which of the both sides of the stacked portion of the shelf board is up, and the stability of the shelf board is high. In addition, the shelf stopper can be fixed to the column more firmly.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a prefabricated shelf according to the present invention.
FIG. 2 is an enlarged schematic view of a shelf stopper in FIG. 2A is a schematic view seen from above, FIG. 2B is a schematic view seen from the side, FIG. 2C is a schematic view seen from diagonally above, and FIG. It is the schematic seen from the direction.
FIG. 3 is a schematic cross-sectional view showing another form of the shelf board stopper.
FIG. 4 is an enlarged schematic view of a main part showing one embodiment of a shelf stopper and a column.
FIG. 5 is an enlarged schematic view of the shelf board in FIG. 1; FIG. 5A is a schematic view when one surface of the stacking portion of the shelf is up, and FIG. 5B is a schematic view when the other surface is up.
FIG. 6 is an enlarged schematic view of the support in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Assembling-type shelf 2 Shelf board 30 Stacked part 31 of a shelf board One side 32 of the stacked part of a shelf board Side surface 33 of a shelf board 4 The other side of the stacked part of a shelf board 4 The receiving hole part 5 of a shelf board Plate stopper 51 One split portion 52 of the shelf stopper 52 Other split portion 511 of the shelf stopper 511 Shelf plate stopper taper surface 512 Shelf plate stopper taper surface 521 Shelf plate stopper taper surface 522 Shelf plate stopper taper surface 531 Shelf Plate stopper ridge 532 Shelf plate stopper ridge 6 Column 611 Column circumferential groove 612 Column circumferential groove

Claims (8)

A shelf plate and a support column that is fitted to the inner surface of the receiving hole portion of the shelf plate via a cylindrical shelf plate stopper and supports the shelf plate,
The shelf hole of the shelf plate has a substantially polygonal inner surface in cross section, each inner surface of the substantially polygonal shape forms a tapered surface in the vertical direction, and the tapered surface of each inner surface is in the circumferential direction. The downward taper surface and the upward taper surface are alternately repeated,
The shelf stopper is configured to be externally mounted at a desired position of the support column, and an outer peripheral surface thereof has an upward tapered surface and a downward tapered shape that are opposite to the tapered surface of the receiving hole portion of the shelf plate. And the surface is alternately repeated in the circumferential direction,
The shelf board is fixed to the shelf board stopper externally mounted on the support column at a desired position by a wedge action between the tapered surface of the inner surface of the receiving hole of the shelf board and the tapered surface of the outer surface of the shelf board stopper. Assembled shelf. The assembly type shelf according to claim 1, wherein the tapered surface of the inner surface of the receiving hole portion of the shelf plate and the tapered surface of the outer surface of the shelf plate stopper are flat surfaces. The assembly-type shelf according to claim 1 or 2, wherein each of the tapered surface of the inner surface of the receiving hole portion of the shelf plate and the tapered surface of the outer surface of the shelf plate stopper is composed of at least four surfaces. The tapered surface of the inner surface of the receiving hole portion of the shelf plate and the tapered surface of the outer surface of the shelf plate stopper are both narrowed in the inclination direction. Assembled shelf. The assembly-type shelf according to any one of claims 1 to 4, wherein the shelf board stopper has a detachable split structure. 6. The outer surface of the support column is provided with recesses at intervals in the axial direction, and the inner surface of the shelf stopper is provided with a projecting portion that fits into the recess of the support column. The assembly-type shelf as described in any one of paragraphs. The assembling-type shelf according to claim 6, wherein the concave portion of the support column is a circumferential groove, and the convex portion on the inner surface of the shelf board stopper is a protrusion. The shelf according to claim 6 or 7, wherein the shelf stopper is provided with a convex portion that fits into at least two of the concave portions of the support column.

Images