JP6936940B2 - Metal box shelves, metal shelves and metal wagons - Google Patents

Description

The present invention relates to metal box-shaped shelves, metal shelves and metal wagons.

Metal box-shaped shelves are widely used in metal cabinets, metal shelves, metal wagons, and the like.

There are two types of metal box-shaped shelves, one is a fixed type that is used by fixing it to a support, and the other is a mobile type that is used as a drawer. In each case, as shown in FIG. 1, side walls 2 are erected on the four sides of the square bottom plate 1 to form a box, the tip of the side wall 2 is folded back inside the box to provide an inner wall 3, and between the inner wall 3 and the side wall 2. A gap 4 is provided in the wall, and the tip of the inner wall 3 is extended toward the side wall 2 to provide a bent portion 5. When the gap 4 is provided in this way, the bending of the shelf board is reduced and the strength of the shelf board is improved, so that it has been widely used recently.

It is difficult for the bent portion 5 to be brought into close contact with the bottom plate 1 for work reasons. Therefore, the bent portion 5 is located at a position away from the bottom plate 1, and a recess 6 having the side wall 2 as the bottom is formed between the bent portion 5 and the bottom plate 1.

If there is a recess 6, there is a problem that the article placed on the shelf board enters the recess 6 and it becomes difficult to take out the article from the shelf board.

Further, in the conventional shelf board, the width of the inner wall 3 has been made as large as possible in order to make the effect of reinforcement remarkable, so that the recess 6 has a narrow width. Therefore, no attempt was made to close the depression 6. Further, in the fixed type shelf board, bolts for fixing to the support column have to be provided in the double wall portion where the side wall 2 and the inner wall 3 coexist. Therefore, there is a problem that it is difficult to attach a nut to the side wall surface in the gap 4.

The fixed box-shaped shelf board as described above is described in Japanese Patent Application Laid-Open No. 2007-289549.

On the other hand, in the movable box-shaped shelf board, in order to facilitate pulling out, a handle is attached to the side wall 2 located on the front side, and a roll and a groove-shaped rail are attached to the outside of the side wall 2 located on both sides. And it has made it easier to move. However, in the box-shaped shelf board shown in FIG. 1, there is a problem that it is difficult to attach the handle, the roll, or the like because the attachment portion is a double wall portion in which the side wall 2 and the inner wall 3 coexist.

In addition, as shown in FIG. 1, it was attempted to fill the dent caused by attaching the handle only to the box-shaped shelf board provided with only the side wall instead of the double wall. That is, since the handle is attached as shown in FIG. 2, a part of the handle 7 protrudes inside the box-shaped shelf board, and in order to hide this protrusion, a covering material 8 covering the upper side and the side of the protrusion is provided. It was attached.

The portion 3 covering the side of the covering material 8 constitutes the inner wall of the shelf board and is determined not to reach the bottom board. Therefore, a recess 6 having the side wall 2 as the bottom is formed between the covering material 8 and the bottom plate 1. An abutting material 40 was used to fill the recess 6. The abutting material 40 is a long body having a U-shaped cross section, narrows the U-shaped opening, pushes it into the recess, and is elastically locked in the recess. There was a problem that it was not easy to remove.

Japanese Unexamined Patent Publication No. 2007-289549

The present invention has been made in an attempt to solve the above-mentioned problems in a metal box-shaped shelf board.

That is, in the conventional box-shaped shelf board, a recess having a side wall as the bottom is formed inside the shelf board, and the present invention has been made in an attempt to eliminate this recess. Further, in the fixed box-shaped shelf board, it is difficult to attach nuts when fixing to the support with bolts and nuts, and in the mobile box-shaped shelf board, it is difficult to attach handles, rolls, etc. Therefore, the present invention has been made in an attempt to solve this difficulty.

In the present invention, in the main body of the shelf board, a bent portion extending toward the side wall is provided at the tip of the inner wall, and a notch is provided in the bent portion. On the other hand, in order to eliminate the dent with the side wall as the bottom, a new contact material sufficient to fill the dent was prepared, and the contact material was provided with a protrusion to be inserted into the notch provided in the shelf board main body. Then, it was decided to insert the protrusion of the contact material into the notch of the shelf board body to fix the contact material to the shelf board body.

That is, in the present invention, as shown in FIG. 3, in the shelf board main body X, a bent portion 5 extending toward the side wall 2 is attached to the tip of the inner wall 3, and a notch 9 is provided in the bent portion 5. ..

Further, in the newly prepared contact material Y, the protrusion 14 is provided on the upper piece 12 that contacts the bent portion 5. Then, the protrusion 14 is inserted into the notch 9 to fix the abutting material to the shelf board main body.

Further, in the present invention, in order to facilitate fixing the box-shaped shelf board to the support column with bolts and nuts, the width of the inner wall of the shelf board body is reduced, the width of the side wall is set to 50 to 300 mm, and the width of the side wall is set to 50 to 300 mm. The width was 1/6 to 5/6 of the width of the side wall. Among them, it is preferably one-fourth to three-quarters, particularly one-third to two-thirds.

In the present invention, side walls are erected on four sides of a square bottom plate to form a box, at least one side wall is provided with an inner wall lined with the side wall, a gap is provided between the side wall and the inner wall, and the inner wall is directed toward the side wall. In a shelf board in which an extending bent portion is attached and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion, and on the other hand, a contact material for filling the recess is provided. The abutting material is a long body with a U-shaped cross section, and a protrusion is provided on the surface in contact with the bent portion, and the protrusion is inserted into the notch of the shelf board to contact the shelf board. It provides a box-shaped shelf board formed by fixing a material.

The present invention also provides a mobile box-shaped shelf board. The mobile box-shaped shelf board has side walls erected on the four sides of the square bottom plate to form a box, and a handle is attached to one of the four side walls so that a part of the handle protrudes into the box. In a shelf board in which an inner wall along with a side wall is provided inside the box to hide the side of the protrusion, and a recess having a side wall as the bottom is formed between the tip of the inner wall and the bottom plate, the side wall is placed at the tip of the inner wall. An abutment material is provided to fill the dent, and the abutment material is a long body having a U-shaped cross section. A protrusion is provided on the surface in contact with the bent portion, and the protrusion is inserted into the notch of the shelf board to fix the abutting material to the shelf board.

The present invention also provides a fixed box-shaped shelf board. The fixed box-shaped shelf board has side walls erected on the four sides of the square bottom plate to form a box, and the tips of each side wall are folded back inside the box to provide an inner wall, and a gap is provided between each inner wall and the side wall. In a shelf board in which a bent portion extending toward the side wall is provided at the tip of the inner wall and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, at least one set of facing side walls is described above. A notch is provided in the bent portion, and on the other hand, an abutting material for filling each of the above recesses is prepared. The contact material is characterized in that a protrusion is provided on the surface in contact with the bent portion, and the protrusion is inserted into the notch of the shelf board to fix the contact material.

The present invention also provides a metal shelf using the above-mentioned fixed box-shaped shelf board. The metal shelf has side walls erected on the four sides of the square shelf board to form a box, and the tips of each side wall are folded back inside the box to provide an inner wall, and a gap is provided between each inner wall and the side wall to provide a gap between the inner wall and the inner wall. In a shelf board in which a bent portion extending toward the side wall is formed first and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion and the side wall corresponding to the bottom of the recess is provided. A bolt hole is drilled in the shelf to form a shelf board, and the shelf board is fixed to the support column by a bolt passed through the bolt hole of the shelf board from the support column and a nut arranged on the inner surface of the side wall of the shelf board, while filling the recess. An abutting material is prepared, and the abutting material is a long body having a U-shaped cross section. Is fixed to a shelf board.

Further, the present invention also provides a metal wagon in which casters are attached to the lower portion of the metal shelf according to the present invention to make the metal shelf movable. The metal wagon has side walls erected on the four sides of the square bottom plate to form a box, the tips of each side wall are folded back inside the box to provide an inner wall, a gap is provided between each inner wall and the side wall, and the tip of the inner wall is provided. A bent portion extending toward the side wall is formed in the wall, a recess having the side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion, and a bolt hole is formed in the side wall corresponding to the bottom of the recess. Prepare a shelf board by installing it, fixing the shelf board to the shelf board with bolts passed from the support column through the bolt holes of the shelf board and nuts arranged on the inner surface of the side wall of the shelf board, and on the other hand, a contact material for filling the recess. However, the abutting material is a long body having a U-shaped cross section, and a protrusion is provided on the surface in contact with the bent portion, and the protrusion is inserted into the notch of the shelf plate to put the abutting material on the shelf. It is characterized by being fixed to a plate to form a metal shelf and having casters attached to the bottom of the shelf.

In the present invention, the abutting material used is a long body having a U-shaped cross section, and it is a simple one in which a protrusion is simply attached to a part of the upper piece, so that it is easy to manufacture. Therefore, it is easy to carry out.

Further, the fixed box-shaped shelf board used in the present invention is easy to manufacture because it is a conventional fixed box-shaped shelf board and only a notch is provided in a part of the bent portion. Therefore, it is easy to carry out.

Further, in the present invention, it is easy to fix the abutting material to the box-shaped shelf board. This is because, for fixing, it is sufficient to first tilt the center piece of the abutting material so that it leans forward, insert the protrusion of the abutting material into the notch of the box-shaped shelf board, and then push in the lower piece. Because. The fixed contact material rarely comes off the shelf board because the protrusions are fitted in the notches.

Further, the abutting material fixed in this way can be easily removed. This is because the contact material can be removed by slightly lifting the lower piece of the contact material and then pulling the lower piece to remove the protrusion from the notch, and then simply pulling the lower piece.

In the present invention, since the width of the inner wall is reduced, the width of the recess 6 is increased, and therefore the portion of the side wall 2 corresponding to the bottom of the recess 6 is increased. Become. The box-shaped shelf board according to the present invention has a large side wall width and is suitable for a so-called deep bottom shelf board.

Further, in the metal shelves and metal wagon according to the present invention, since providing the bottom bolt holes in the inner wall portion corresponding to the depression, and disconnect the contact material to expose the bolt hole, the nut easily around the bolt holes It can be placed and easily tightened with bolts and nuts that have passed through the bolt holes in the shelves from the columns. Therefore, it is easy to fix the shelf board to the support column.

Further, in the box-shaped shelf board fixed in this way, the abutting material can be easily fixed to the internal recess. By fixing the abutting material, the nut is not exposed, so it looks good, and since there are no dents, it is easy to put in and take out the article.

Further, the position of the box-shaped shelf board on the support column can be easily changed by removing the abutting material.
The present invention brings about the above-mentioned effects.

It is a partially cutaway perspective view of a conventional fixed box-shaped shelf board. It is a partially cutaway perspective view of a conventional mobile box-shaped shelf board. It is explanatory drawing for demonstrating this invention. It is a partial notch inclination view in the disassembled state of the mobile box-shaped shelf board which concerns on this invention. It is a partial notch inclination view in the disassembled state of the fixed box-shaped shelf board which concerns on this invention. It is a front view and a side view of the contact material used for the fixed box-shaped shelf board of FIG. It is a partially cutaway perspective view of the metal shelf which concerns on this invention. It is a perspective view of the metal shelf which concerns on this invention. It is a perspective view of the metal wagon which concerns on this invention.

Next, an embodiment of the present invention will be described. The embodiment is divided into a mobile box-shaped shelf and a fixed box-shaped shelf board as described above. Among them, the mobile one is easy, so first, the mobile box-shaped shelf board will be described.

An example of a mobile box-shaped shelf board is shown in FIG. The box-shaped shelf board of FIG. 4 is composed of a shelf board main body A and an abutting material B.

The shelf board main body A has side walls 2 erected on the four sides of the rectangular bottom plate 1 to form a box, and the box can be moved in the direction of the arrow 100. Therefore, a handle 7 is attached to the one side wall 2, and a part of the handle 7 projects to the inside of the box. The other three side walls have no inward protrusions and are flat surfaces.

In the shelf board main body A, the inner wall 3 is a part of the covering material 8 that covers the protrusion of the handle. The tip of the inner wall 3 is bent so as to extend toward the side wall 2, and the bent portion 5 is provided. The bent portion 5 forms a recess 6 having the side wall 2 as the bottom between the bent portion 5 and the bottom plate 1. Further, the bent portion 5 has a notch 9 formed at the tip thereof.

The abutting material B has a size sufficient to fill the recess 6 of the shelf board main body A, and the upper piece 12 and the lower piece 13 are attached to both sides of the central piece 11, and the cross section is a U-shaped long body. Is. A protrusion 14 is attached to the upper piece 12.

The box-shaped shelf board according to the present invention is made by fixing the contact material B to the recess 6 of the shelf board main body A. At the time of fixing, the central piece 11 of the abutting material B can be tilted forward, the protrusion 14 is inserted into the notch 9 of the shelf board main body A, and then the central piece 11 is made vertical.

In this way, since the recess 6 of the box-shaped shelf board to which the contact material is fixed is filled with the contact material, the article placed on the shelf board does not get caught in the recess 6, and therefore the loading and unloading of the article is hindered. It disappears.

Further, the fixed contact material B cannot be easily removed because the protrusion 14 is fitted into the notch 9 of the shelf board main body A.

Further, the fixed contact material can be removed from the shelf board main body A. This is easy because it can be done simply by lifting the abutting material B and pulling the lower piece 13 toward you.
As described above, this box-shaped shelf board has great utility value.

Next, the fixed box-shaped shelf board according to the present invention will be described. This shelf board is composed of a shelf board main body indicated by reference numeral C in FIG. 5, a contact material D, and a contact material E shown in FIG.
The shelf board body C is made of a steel plate having a thickness of 1 mm, and side walls 2 having a width of 120 mm are erected on four sides of a rectangular bottom plate 1 having a long side of 600 mm and a short side of 400 mm to form a box. An inner wall 3 having a folded width of 40 mm is provided inside the box, a gap 4 having a width of 8 mm is provided between the inner wall 3 and the side wall 2, and the tip of the inner wall 3 is extended toward the side wall 2 to form a bent portion 5. It is provided and configured. This configuration is similar to the conventional fixed shelf board shown in FIG.

However, the shelf board main body C is different from the conventional fixed shelf board in the following points. First, the width L of the inner wall 3 is set to one-third of the width M of the side wall 2. As a result of being reduced to one-third, a large recess 6 having the side wall 2 as the bottom is formed between the bent portion 5 and the bottom plate 1. Secondly, a notch 9 is provided at the center of the tip of the bent portion 5. The notch 9 has a frontage of 20 mm and a depth of 1 mm. Thirdly, a bolt hole 10 is bored in a part of the side wall 2 forming the recess 6 (that is, a portion without an inner wall).

In the box-shaped shelf board according to the present invention, the contact material D shown in FIG. 5 and the contact material E shown in FIG. 6 are used to fill the recess 6 of the shelf board main body C. The abutting material D and the abutting material E are made of steel plates having the same thickness as the shelf board main body C, and are formed on both sides of a central piece 11 or 21 having a width of 80 mm and an upper piece 12 or 22 having a width of 9 mm, respectively. A lower piece 13 or 23 is attached, and the cross section is a U-shaped elongated body.

The abutting materials D and E differ in the following points. The abutting material E is arranged along the long side of the bottom plate 1, and the abutting material D is arranged along the short side of the bottom plate 1. Therefore, the two have different lengths in the longitudinal direction. That is, the abutting material E is the length of the inner method of the long side of the bottom plate 1, but since the abutting material D is supposed to straddle between the two abutting materials E, the length is the length of the bottom plate 1. The length is obtained by subtracting twice the width of the upper piece 22 of the abutting material E from the length of the inner method of the short side of the above.

Further, the abutting material D is provided with a protrusion 14 at the center of the upper piece 12 in the longitudinal direction, but the abutting material E omits the protrusion on the upper piece. The protrusion 14 has a length of 20 mm and a height of 5 mm. Further, the abutting material D is flat at both ends in the longitudinal direction, but the abutting material E is provided with two notches 25 at both ends in the longitudinal direction. The notch 25 has an opening of 20 mm and a depth of 5 mm. The notch 25 is for avoiding the nut already attached when proceeding toward the recess 6, as will be described later.

The fixed box-shaped shelf board according to the present invention is configured as follows. First, the contact material E is arranged in the recess 6 on the long side of the shelf board main body C to fill the recess 6 on the long side. At this time, since the contact material E is not provided with a protrusion, it is in a state where it can fall inward.

Next, the contact material D is brought close to the recess 6 on the short side of the shelf board body C in a bent forward state, and the protrusion 14 of the contact material D is inserted into the notch 9 of the shelf board body C. After that, the lower piece 13 is pushed toward the side wall to come into contact with the side wall. Then, since both ends of the contact material D in the longitudinal direction are in close contact with the central piece 21 of the two contact materials E, the contact material E does not fall inward.

The fixed box-shaped shelf board according to the present invention was produced in this way. Since the recess 6 of this box-shaped shelf board is filled with an abutting material, the inner surface of the box-shaped shelf board is smooth, and it is easy to put in and take out articles. In addition, the inner surface is smooth, so it looks good.

Further, since this fixed box-shaped shelf board is used by fixing the columns at the four corners, it is easy to fix the columns to the columns. This is because the contact material D can be easily removed from the shelf board main body by lifting the contact material D and removing the protrusion from the notch, and then the contact material E can also be easily removed. When the abutting material is removed, the bolt hole 10 is exposed on the inner surface of the side wall, so that a nut can be easily attached to the bolt hole 10. Then, the support and the shelf can be easily fixed by the bolts and nuts that are passed through the bolt holes of the shelf from the support.

After fixing the shelf board main body to the support column, the contact material can be fixed to the recess 6 of the shelf board main body to smooth the inner surface.

In the above description, it is decided that the contact material E is not provided with the protrusions, but if it is bothersome, the contact material E may be provided with the protrusions.
The fixed box-shaped shelf board according to the present invention has the above-mentioned effects.

Next, the metal shelf according to the present invention will be described.
In the metal shelf according to the present invention, a plurality of box-shaped shelf boards according to the present invention are arranged one above the other, and the four corners of each shelf board are fixed by columns and integrated.

As the support, a long body (angle) having an L-shaped cross section is used.

In order to make the metal shelf according to the present invention, first, the abutting material D and the abutting material E are removed from the box-shaped shelf board according to the present invention, and the shelf board is brought into the state of the shelf board main body C shown in FIG. do. That is, the recess 6 is exposed so that the bolt hole 10 is exposed inside the box.

In this state, as shown in FIG. 7, the corner of the side wall 2 of the shelf board is brought into close contact with the inner surface of the angle 50.

Next, a bolt 60 is passed through a hole formed in the angle 50, the tip of the bolt 60 is passed through the bolt 10 of the shelf board, and the tip of the bolt 60 is further arranged on the inner surface of the side wall 2 of the shelf board (not shown). The side wall 2 and the support column 50 are tightened with bolts and nuts to fix the shelf board to the support column.

In this way, after fixing the columns 50 to the four corners of the shelf board, the contact material is fixed to the recesses 6 of the shelf board. To do so, first, the contact material E is brought into contact with the recess 6 on the long side of the shelf board. At this time, the nut protrudes from the side wall of the short side, but since the contact material E is provided with the notch 25, the contact material E is easily recessed by passing the nut through the notch 25. 6 can be contacted.

After attaching the two abutting materials E whose long sides face each other in this way, the abutting material D is inserted between the two abutting materials E facing each other. The inserted contact material D inserts the protrusion 14 into the notch 9 of the shelf board to fill the recess 6 on the short side. As a result, the contact material D is fixed to the shelf board, and the contact material E is prevented from falling inward by the contact material D, so that the contact material is fixed to the shelf board.

After fixing one shelf board to the support column in this way, another box-shaped shelf board according to the present invention is arranged above or below the shelf board, and similarly fixed to the support column to form a shelf.

In the shelf made in this way, as shown in FIG. 8, since the contact materials D and E are fixed to the inner surface of the shelf board, the nuts are not exposed and the appearance is good, and since there are no dents, articles are taken in and out. There are no obstacles.

On top of that, the abutting materials D and E can be easily removed from the shelf board, so that the nuts can be removed to expose the nuts, the nuts and bolts can be removed, and the fixing position of the shelf board can be easily changed.
The metal shelf according to the present invention has the above-mentioned advantages.

Finally, the metal wagon according to the present invention will be described.
As shown in FIG. 9, the metal wagon has casters 70 attached to the lower part of the metal shelf made in the third embodiment to make the metal shelf movable.

It is suitable to attach casters to the lower end of each column.
As described above, this metal wagon has casters attached to the metal shelves, and therefore retains the advantages of the metal shelves as they are. Since it is movable on top of it, it has the advantage of being able to carry goods.

1 Square bottom plate 2 Side wall 3 Inner wall 4 Gap 5 Folded part 6 Depression 7 Handle 8 Covering material 9 Notch 10 Bolt hole A Partial perspective view of the mobile box-shaped shelf board according to the present invention B, D Perspective view of the contact material C Fixed shelf board body according to the present invention E Front view and side view of abutment material 11, 21 Central piece of abutment material 12, 22 Upper piece of abutment material 13, 23 Lower piece of abutment material 14, 24 Protrusions 25 Notches 50 Struts 60 Bolts 70 Caster

Claims (7)

Side walls are erected on the four sides of the square bottom plate to form a box, and at least one side wall is provided with an inner wall lined with the side wall, a gap is provided between the side wall and the inner wall, and a bent portion extending toward the side wall at the tip of the inner wall. In the shelf board in which a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion, and on the other hand, a contact material for filling the recess is prepared. The contact material is a long body having a U-shaped cross section, and a protrusion is provided on the surface in contact with the bent portion, and the protrusion is inserted into the notch of the shelf board to attach the contact material to the shelf board. A fixed box-shaped shelf board. A box is made by erecting side walls on the four sides of the square bottom plate, and a handle is attached to one of the four side walls so that a part of the handle protrudes into the box and the side of the protrusion is hidden. In a shelf board in which an inner wall is provided alongside the side wall inside the shelf, and a recess with the side wall as the bottom is formed between the tip of the inner wall and the bottom plate, a bent portion extending toward the side wall is attached to the tip of the inner wall. , A notch is provided in the bent part, and on the other hand, an abutting material is prepared to fill the dent. A mobile box-shaped shelf board that is attached and has a protrusion inserted into the above-mentioned notch in the shelf board to fix the contact material to the shelf board. Side walls are erected on the four sides of the square bottom plate to form a box, the tips of each side wall are folded back inside the box to provide an inner wall, a gap is provided between each inner wall and the side wall, and the end of the inner wall extends toward the side wall. In a shelf board in which a bent portion is provided and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, at least one set of facing side walls is provided with a notch in the bent portion. On the other hand, a contact material for filling each of the recesses is prepared, the contact material is a long body having a U-shaped cross section, and the contact material that contacts the set of side walls is in contact with the bent portion. A fixed box-shaped shelf board having protrusions on the surface and inserting the protrusions into the notches of the shelf board to fix the abutting material. Side walls are erected on the four sides of the square shelf to form a box, the tips of each side wall are folded back inside the box to provide an inner wall, a gap is provided between each inner wall and the side wall, and the tip of the inner wall is directed toward the side wall. In a shelf board in which an extending bent portion is formed and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion and a bolt hole is formed in the side wall corresponding to the bottom of the recess. On the other hand, a contact material for filling the recess is prepared, and the contact material is a long body having a U-shaped cross section, and a protrusion is provided on the surface in contact with the bent portion. A fixed box-shaped shelf board in which the protrusion is inserted into the notch of the shelf board and the contact material is fixed to the shelf board. Side walls are erected on the four sides of the square bottom plate to form a box, the tips of each side wall are folded back inside the box to provide an inner wall, a gap is provided between each inner wall and the side wall, and the end of the inner wall extends toward the side wall. In a shelf board in which a bent portion is provided and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion on at least one set of facing side walls. On the other hand, a contact material for filling each of the recesses is prepared, and the contact material that contacts the side wall of the set is provided with a protrusion on the surface in contact with the bent portion, and the other opposite set of hits. The contact material is provided with notches at both ends in the longitudinal direction for passing nuts, and after the other set of contact materials is installed on the shelf board, the protrusions of the set of contact materials are provided. A fixed box-shaped shelf board that is inserted into the notch of the shelf board to fix the contact material. Side walls are erected on the four sides of the square shelf to form a box, the tips of each side wall are folded back inside the box to provide an inner wall, a gap is provided between each inner wall and the side wall, and the tip of the inner wall is directed toward the side wall. In a shelf board in which an extending bent portion is formed and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion and a bolt hole is formed in the side wall corresponding to the bottom of the recess. The shelf board is made into a shelf board, and the shelf board is fixed to the support board by bolts passed from the support column through the bolt holes of the shelf board and nuts arranged on the inner surface of the side wall of the shelf board. A metal shelf in which protrusions are provided on the surface of the contact material in contact with the bent portion, the protrusions are inserted into the notches of the shelf board, and the contact material is fixed to the shelf board. Side walls are erected on the four sides of the square bottom plate to form a box, the tips of each side wall are folded back inside the box to provide an inner wall, a gap is provided between each inner wall and the side wall, and the end of the inner wall extends toward the side wall. In a shelf board in which a bent portion is formed and a recess having a side wall as the bottom is formed between the bent portion and the bottom plate, a notch is provided in the bent portion and a bolt hole is formed in the side wall corresponding to the bottom of the recess. As a shelf board, the shelf board is fixed to the support column by bolts passed through the bolt holes of the shelf board from the support column and nuts arranged on the inner surface of the side wall of the shelf board, and on the other hand, a contact material for filling the recess is prepared. A protrusion is provided on the surface of the contact material in contact with the bent portion, the protrusion is inserted into the notch of the shelf board, the contact material is fixed to the shelf board to form a metal shelf, and casters are placed at the bottom of the shelf. An attached metal wagon.

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