JP2019199274A - Folding container - Google Patents

Abstract

To provide a folding container which can be stacked on small size containers arranged side by side while having a size in which upper end edges of the wall part folded first overlap with each other, and in which the thickness direction dimension is small in the folded posture.SOLUTION: In a folding container, wall parts are provided at four sides of a bottom surface plate 2 having two pairs of opposite sides, and the container can be folded by each wall part being folded inwardly by a folding operation with the sides along each bottom surface plate 2 being the shaft. In the folded posture, both of the wall parts 3, 4 of the first opposite sides are located between both wall parts 5 of the second opposite sides and the bottom surface plate 2. Furthermore, at a middle position of the first sides with each other on the rear surface of the bottom surface plate 2, a groove in parallel with the first opposite sides is formed. A region including the portion where the rear surface is the groove on the upper surface of the bottom surface plate is made to be a raised region higher than the other regions.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a folding container that accommodates various articles and can be folded. More specifically, the present invention relates to a folding container that can be used by stacking smaller containers side by side.

  Conventionally, a folding container has been used that has a rectangular shape with an opening at the top and can be folded compactly by tilting the four side walls inward. As an example of such a folding container, the one described in Patent Document 1 can be cited. In the folding container of the same document, the upper end edges of the opposite side wall portions (side plates) that are tilted first when folded are overlapped in the folded state. At the same time, a recess is provided in the center of the upper surface of the bottom plate. Thereby, in the folded state, the overlapping portion of the wall portions that have been tilted first sinks into the recessed portion (Claim 2 of the same document). This improves the reduction ratio of height by folding ([Summary] [Problem] in the same document).

  On the other hand, as another example of the folding container, the one described in Patent Document 2 can be cited. The folding container of the same document is configured to stack small containers side by side. For this reason, a concave groove is provided on the back surface of the bottom (“1e” in FIG. 4 of the same document). This concave groove is a portion into which the upper end portion of the side wall of the small container below is inserted in a stacked state ([0006] of the same document).

JP 2004-168374 A JP 2002-46737 A

  However, the conventional techniques described above have the following problems. As described in Patent Document 2, when stacking by stacking on containers of different sizes, various combinations of sizes of upper and lower containers are conceivable. There can also be a combination in which the side wall of the lower container is positioned directly behind the position where the upper end edges of the wall portions that are tilted first in the upper folding container overlap each other as in Patent Document 1. In that case, if the technical contents of Patent Documents 1 and 2 are combined, both the concave portion on the upper surface and the concave groove on the back surface must be formed at the position on the bottom plate of the upper folding container. Become. This is extremely difficult.

  The present invention has been made to solve the above-described problems of the prior art. In other words, the problem is that a folding container having a size in which the upper end edges of the wall part to be tilted first can be stacked on top of each other while small size containers are juxtaposed, and the dimension in the thickness direction in the folded state is small. It is to provide.

  The folding container according to one aspect of the present invention is provided with walls on four sides of a bottom plate having two sets of opposite sides, and each wall is directed inward by a folding operation with the sides along the respective bottom plates as axes. In the folded state, each wall portion of the first opposite side is located between both the wall portions of the second opposite side and the bottom plate, and can be folded. A groove parallel to the first opposite side is formed at an intermediate position between the first opposite sides on the back surface of the base plate, and a region including a portion where the back surface is a groove on the upper surface of the bottom plate is more than the other regions. It is also considered a high excitement area.

  In the folding container according to the above aspect, the aforementioned groove is formed on the back surface of the bottom plate. For this reason, it is possible to stably stack the folded containers of this embodiment while arranging smaller containers side by side. Further, in the folded state in which the folding container is folded, most of one wall portion of the first opposite side is located on a lower region of the upper surface of the bottom plate that is not a high raised region. For this reason, even if the raised area is formed, the thickness of the folding container in the folded state does not increase so much.

  Further, in the folding container of the above aspect, each wall portion of the first opposite side has a height in which the tip portions overlap each other in the folded state, and a thin-walled region is thinner than the other parts within the overlapping region in the folded state. It is desirable that it is provided. In this case, the thin regions of the wall portions of the first opposite side overlap each other in the folded state. For this reason, the thickness of the folded container in the folded state has not increased so much even though the wall portions of the first opposite side partially overlap each other. In the folded state, the raised area of the bottom plate is located below the thin area of the wall portion of the first opposite side. In this respect as well, the thickness of the folding container is reduced.

  Further, in the folded container of the above aspect, each wall portion of the first opposite side has a height whose upper end exceeds the raised region in the folded state, and in the thin-walled region, a concave portion that is recessed from the other portions, It is desirable that the folded surface is formed on the surface facing the bottom plate over a range where the raised area is straddled. In this manner, in the folded state, the raised area of the bottom plate enters the concave portion. In this respect as well, the thickness of the folding container is reduced.

  According to this configuration, there is provided a folding container in which the upper end edges of the wall part to be tilted first can be stacked on top of each other while the small size containers are juxtaposed and the thickness direction dimension in the folded state is small. ing.

It is a perspective view of the folding container which concerns on embodiment. It is a perspective view of the bottom plate in the folding container of FIG. FIG. 2 is a perspective view showing the folding container of FIG. 1 in a folded state. FIG. 3 is a perspective view (No. 1) showing a state in the middle of folding the folding container of FIG. 1 with one long side wall portion removed. FIG. 3 is a perspective view (No. 2) showing a state in the middle of folding the folding container in FIG. 1 with one long side wall portion removed. It is a perspective view which shows the state in the middle of folding the folding container of FIG. FIG. 4 is a perspective view showing the folding container of FIG. 3 upside down. FIG. 3 is a perspective view showing the bottom plate of FIG. FIG. 3 is a partial enlarged cross-sectional view of the bottom plate of FIG. 2. It is a perspective view of the wall part of the short side in the folding container of FIG. It is sectional drawing of the wall part of FIG. It is sectional drawing of the folding container in the folding state of FIG. It is an expanded sectional view which expands and shows a part of FIG. FIG. 4 is a perspective view showing a state in which a plurality of folding containers in the folded state of FIG. 3 are stacked. It is the perspective view which looked at the folding container in the folding state of FIG. 3 from another direction.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, the present invention is embodied as the folding container 1 shown in FIG. The folding container 1 of the present embodiment shown in FIG. 1 has a rectangular parallelepiped outer shape and an open top surface. The folding container 1 of this embodiment has a bottom plate 2 and walls 3 to 6 provided on four sides thereof.

  The bottom plate 2 can be seen only in the front side edge portion in FIG. 1, but has a rectangular shape having two pairs of opposite sides as shown in FIG. The bottom plate 2 has dam portions 9 and 10 on four sides. Among these, the dam portion 10 of the long side (second opposite side) is formed higher than the dam portion 9 of the short side (first opposite side). Further, a flat region 11 and a raised region 12 are formed on the upper surface of the bottom plate 2, that is, the surface on which the stored items are placed in the folding container 1. The flat region 11 occupies most of the upper surface of the bottom plate 2. The raised area 12 is an area that is higher than the flat area 11. The raised region 12 is formed in parallel with the short side at an intermediate position between the short side and the short side of the bottom plate 2. An inclined surface 13 is provided between the raised region 12 and the flat region 11. The reason why the raised area 12 is provided on the bottom plate 2 will be described later.

  In the folding container 1 of FIG. 1, the wall portions 3 and 4 are on the short side dam portions 9 of the bottom plate 2 and the wall portions 5 and 6 are on the long side dam portions 10. It is. The folding container 1 of FIG. 1 further has ceiling plates 7 and 8 along both long sides of the opening on the upper surface. A portion between the ceiling plate 7 and the ceiling plate 8 is a substantial opening portion.

  The walls 3 to 6 in the folding container 1 are of a retractable type. Therefore, the folding container 1 can be made into the folding state shown in FIG. 3 by tilting the walls 3 to 6 inward. In the folding container 1 in the folded state shown in FIG. 3, the wall portion 5 is located at the top. Immediately below the wall 5, the wall 6 is located, which is difficult to understand in FIG. 3. Although the wall portions 3 and 4 are hardly visible in FIG. 3, they are further below the wall portion 6. Of course, the bottom plate 2 is the lowest. In addition, the state of FIG. 1 with respect to the folded state of FIG.

  In the folding container 1 according to the present embodiment, the wall 3 to 6 are folded first when the folded state shown in FIG. 1 is folded to the folded state shown in FIG. It is necessary to make the procedure of defeating the long side walls 5 and 6 at the same time. This will be described with reference to FIGS. In FIG. 4 and FIG. 5, for convenience of understanding, the wall portion 6 and the ceiling plate 8 which are one of the long side wall portions 5 and 6 on the near side are omitted.

  FIG. 4 shows a state in which the wall portion 3 that is one of the short side wall portions 3 and 4 is first brought down from the extended state. In this state, the raised region 12 of the bottom plate 2 is covered by the wall portion 3 that is tilted down. That is, the height of the wall 3 is such that the upper end exceeds the raised region 12 in the folded state. However, the portion near the wall 4 in the flat region 11 is exposed without being covered by the wall 3.

  FIG. 5 shows a state where the wall portion 4 which is another one of the short side wall portions 3 and 4 is further tilted from the state of FIG. In this state, not only the raised area 12 of the bottom plate 2 but also the flat area 11 is completely covered. In this state, the tip portions of the wall portions 3 and 4 that are tilted overlap each other. That is, the tip end portion of the wall portion 4 covers the tip end portion of the wall portion 3. This indicates that the height dimension of the walls 3 and 4 in the extended state of FIG. 1 is slightly larger than half the long side length of the bottom plate 2.

  FIG. 6 shows a state where the wall portion 6 which is one of the long side wall portions 5 and 6 is further tilted from the state of FIG. In FIG. 6, unlike FIG. 4 and FIG. 5, the wall 6 and the ceiling plate 8 are drawn without omission. If the wall part 5 which is another one of the long side wall parts 5 and 6 is further tilted from the state of FIG. 6, it will be in the state shown in FIG. Note that which of the short side walls 3 and 4 is to be brought down first is arbitrary. It is also arbitrary which of the long side walls 5 and 6 is defeated first.

  In the folding operation of the folding container 1 described above, the hinge shaft for the operation of tilting the walls 3 to 6 is located near the upper ends of the dam portions 9 and 10 of the bottom plate 2. This is because this position is the attachment position of the walls 3 to 6 to the bottom plate 2. That is, the hinge axis position of the long side wall portions 5 and 6 is near the upper end of the long side dam portion 10, and the hinge axis position of the short side wall portions 3 and 4 is near the upper end of the short side dam portion 9. is there. That is, the hinge axis of the long side walls 5 and 6 is higher than the hinge axis of the short side walls 3 and 4. For this reason, there is no particular obstacle to the operation of defeating the short side wall portions 3 and 4 first and then the long side wall portions 5 and 6 thereafter. As can be seen from FIGS. 3 to 6, the ceiling plates 7 and 8 are movably attached to the upper ends of the long side wall portions 5 and 6. When the walls 5 and 6 are tilted down, the ceiling plates 7 and 8 are also laid down.

  The folding container 1 of the present embodiment is assumed to be used by stacking stacked containers on top of each other with smaller size containers juxtaposed. That is, it is assumed that the container “C1” in FIG. 5 of Patent Document 2 is replaced with the folding container 1 of this embodiment. For this reason, as shown in FIG. 7, a groove 14 is formed on the back surface of the bottom plate 2 of the folding container 1 of the present embodiment. The groove 14 is provided in parallel with the short side at an intermediate position between the short sides of the bottom plate 2. The groove 14 has a shape for fitting the top part of the wall part (for two sheets) of the container in the lower stage in the upper stage in the mixed stacked state. Ribs 15 are formed vertically and horizontally in regions other than the grooves 14 on the back surface of the bottom plate 2.

  The groove 14 of the bottom plate 2 will be further described with reference to FIGS. As shown in these drawings, the position where the groove 14 is formed is a position directly behind the position of the raised region 12 shown in FIG. That is, the reason why the raised area 12 is provided is to ensure the strength of the bottom plate 2 even at the position where the back surface is the groove 14. More specifically, the entire upper surface of the bottom plate 2 is not at a high position corresponding to the groove 14. A portion away from the groove 14 is a low flat region 11.

  The raised area 12 can be a factor that increases the dimension in the thickness direction of the folding container 1 in the folded state of FIG. 3. Therefore, in the folding container 1 of the present embodiment, an increase in thickness in the folded state is suppressed by the shape of the short side wall portions 3 and 4. This will be described below.

  FIG. 10 shows the short side walls 3 and 4 in a single state. The wall 3 and the wall 4 are the same when viewed in a single state. In FIG. 10, the front faces are the faces of the walls 3 and 4 that face inward in the folded container 1 in the extended state. In other words, it is the surface that faces downward in the folding container 1 in the folded state and faces the bottom plate 2. Moreover, the upper end 16 of the wall parts 3 and 4 in FIG. 10 is a site | part used as an upper end in the extended state. On the other hand, an attachment shape portion 17 to the dam portion 9 (see FIG. 2) of the bottom plate 2 is provided at the lower end in FIG.

  When the wall portions 3 and 4 of FIG. 10 are viewed in the height direction, a thin region 18 is provided in the vicinity of the upper end 16. In the thin region 18, the wall portions 3 and 4 are thinner than the other regions 19. A cross-sectional structure of the wall portions 3 and 4 is shown in FIG. FIG. 11 shows the upper half of the longitudinal section of the walls 3 and 4. A concave portion 20 that is recessed from the surface of the region 19 other than the thin region is formed on the inward side surface (the right side surface in FIG. 11) in the thin region 18 of the walls 3 and 4. A convex portion 21 is provided at the position of the upper end of the concave portion 20 in FIG. The convex portion 21 has a meaning of ensuring the strength of the wall portions 3 and 4 even if the thin region 18 is formed. Further, the boundary between the lower end of the concave portion 20 and the region 19 is a shoulder portion 22.

  FIG. 12 shows a cross-sectional view of the folding container 1 in the folded state (see FIG. 3). FIG. 12 is a cross-sectional view of the folding container 1 in a direction parallel to the long side of the bottom plate 2. In the cross-sectional view of FIG. 12, each member of the folding container 1 is viewed from the bottom of the bottom plate 2, the short side wall 3, the short side wall 4, the long side wall 6, and the long side wall 5. They are stacked in order. In FIG. 12, a part of the bottom plate 2 is projected on the long side wall 5.

  A part of FIG. 12 is enlarged and shown in FIG. FIG. 13 shows an area near the center in the left-right direction in FIG. The above-described raised region 12 (and the groove 14 on the back surface thereof) is formed on the bottom plate 2 in this region. The short side wall portion 3 immediately above the bottom plate 2 has the concave portion 20 facing the bottom plate 2. The raised region 12 of the bottom plate 2 is covered with the concave portion 20 (thin region 18) of the wall 3. That is, in FIG. 13, the raised region 12 is located between the convex portion 21 and the shoulder portion 22 of the wall portion 3.

  For this reason, the concave portion 20 straddles the raised area 12, and the raised area 12 enters the concave portion 20. Further, the region 19 (see FIGS. 10 and 11) other than the thin-walled region 18 in the wall portion 3 is on the lower flat region 11 in the upper surface of the bottom plate 2. Therefore, in FIG. 13, despite the presence of the raised region 12, the maximum height of the wall portion 3 is equivalent to the case where the raised region 12 is not formed.

  Also in the wall portion 4 immediately above the wall portion 3, the thin region 18 (concave portion 20) is located above the raised region 12. That is, the thin wall regions 18 overlap each other at the wall 3 and the wall 4. For this reason, the maximum height of the wall portion 4 in FIG. 13 is not high despite the presence of the raised region 12 and the wall portions 3 and 4 partially overlapping each other. As a result, the maximum height of the long side walls 5 and 6 in FIG. 13 is also compared with the case where the raised region 12 is not formed and compared with the case where the walls 3 and 4 do not overlap each other. It is not so high. For this reason, the thickness of the folding container 1 in the folded state shown in FIG. 13 (and FIG. 12) does not have to be too thick. This has an effect of reducing the overall height H when a plurality of folded containers 1 in a folded state are stacked as shown in FIG.

  In addition to the above, the folding container 1 is devised to reduce the thickness in the folded state. This point will be described with reference to FIGS. As shown in FIG. 5, an inward convex portion 24 is formed on the side 23 of the long side wall 5. The convex portion 24 is a portion that is engaged with the side sides of the short side wall portions 3 and 4 in the expanded state (FIG. 1) to stabilize the state. On the other hand, a recess 25 is formed on the outward side of the side 23 of the wall 5. The convex portion 24 and the concave portion 25 are formed on both sides 23 of the wall portion 5. Further, although not shown in FIG. 5, it is similarly formed on both sides of the other long side wall portion 6. Further, a concave portion 26 having a concave shape when viewed from above is formed in the short side dam portion 9 of the bottom plate 2.

  In the folded container 1 in the folded state, as shown in FIG. 15, the convex portion 24 of the wall portion 6 which is the lower side of the wall portions 5 and 6 is fitted in the concave portion 26 of the bottom plate 2. Further, the convex portion 24 of the wall portion 5 which is the upper side is fitted in the concave portion 25 of the wall portion 6. Thereby, the presence of the convex portion 24 for engagement in the wall portions 5 and 6 prevents the thickness of the folding container 1 in the folded state from being increased. This holds true even if the wall sections 5 and 6 are reversed.

  Further, in the folded state of FIG. 15, the concave portion 25 of the wall portion 5 on the upper side is vacant. This also applies to the stacked state of FIG. Therefore, when the user tries to lift the plurality of folded containers 1 by hand, the empty space in the recess 25 can be used as a handle. Thereby, the plurality of folding containers 1 in the stacked state of FIG. 14 can be easily lifted except for the bottom one.

  As described above in detail, according to the present embodiment, the thin wall region 18 and the concave portion 20 are provided on the short side wall portions 3 and 4 that are tilted first during the folding operation. This minimizes the thickness of the folding container 1 in the folded state despite the presence of the raised region 12 in the bottom plate 2 and the overlap of the walls 3 and 4 in the folded state. Thus, the folding container 1 that can be used as the upper stage of the mixed stacking in the extended state and that occupies the minimum space in the folded state is realized.

  Note that this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof. For example, a certain amount of variation is conceivable with respect to the relationship between the recessed portion 20 and the raised region 12 in FIG. The concave portion 20 needs to include at least the range of the raised surface 12 of the inclined surface 13, the raised region 12, and the inclined surface 13 in FIG. 9. In addition to that, part or all of the range of the inclined surface 13 may be included. In addition, the specific design of each member is arbitrary.

  Further, in the above embodiment, the folding container 1 in which the short-side wall portion is tilted before the long-side wall portion and the short-side wall portions overlap each other on the raised region 12 is targeted. However, the present invention is not limited to this, and the present invention can be applied to a folding container configured such that the long side wall portion is tilted before the short side wall portion and the front ends of the long side wall portions overlap each other. . In this case, the shape corresponding to the raised region 12 and the groove 14 on the back side thereof is formed in parallel with the long side of the bottom plate. In such an aspect, it is practical to place four small-sized containers in parallel in the lower stage of the mixed loading stack, and the folding container of this aspect is placed thereon, but such an aspect may also be used.

1 Folding container 2 Bottom plate 3, 4 Wall (short side)
5,6 Wall (long side)
11 Flat area 12 Raised area 14 Groove 18 Thin area 20 Concave part

Claims (3)

Walls are provided on the four sides of the bottom plate with two sets of opposite sides,
Each wall can be folded inward by a folding operation with the side along the bottom plate as an axis, and folded.
In the folded state, each wall portion of the first opposite side is a folding container located between both wall portions of the second opposite side and the bottom plate,
A groove parallel to the first opposite side is formed at an intermediate position between the first opposite sides on the rear surface of the bottom plate,
A folding container, wherein a region including a portion of the upper surface of the bottom plate, the back surface of which is the groove, is a raised region higher than the other regions. The folding container according to claim 1, wherein each wall portion of the first opposite side is
In the folded state, the tip portions overlap each other,
A folding container characterized in that a thin-walled area is provided in a range that overlaps in a folded state and is thinner than other parts. A folding container according to claim 2,
Each wall portion of the first opposite side has a height in which the upper end exceeds the raised area in the folded state;
In the thin-walled region, a folded container that is recessed from other parts is formed in a folded state on a surface facing the bottom plate over a range that spans the raised region. .

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