JP2024065867A - Assembling container - Google Patents

Abstract

To provide an assembling container which can be easily assembled without using an adhesive or the like.SOLUTION: There is provided an assembling container formed by folding a planar sheet, in which the container has: a bottom surface part having a substantially rectangular shape and constituting a bottom wall; four side surface parts connected to respective sides of the bottom surface part via folding lines to form side walls; and four engaging pieces disposed so as to correspond to respective apexes of the bottom surface part, connecting two side surface parts adjacent to each apex, and folded along extended lines of diagonal lines of the bottom surface part. Notches are formed in at least two of the four side surface parts, the four engaging pieces are folded back to the outside of the side surface parts, and tip ends of the engaging pieces are inserted into the notches, thereby being engaged with the side surface parts.SELECTED DRAWING: Figure 1

Description

The present invention relates to an assembled container that can be assembled by folding flat sheets.

In both indoor and outdoor situations, assembled containers made of paper and other materials are used for a variety of purposes, such as for storing small items, tableware, and beverages. Conventional assembled containers can be manufactured relatively inexpensively compared to three-dimensional molded containers.

Conventional prefabricated containers are often made by folding flat paper into a specified shape, and then joining the folded parts at specified points with adhesive or resin welding to form a container. However, such conventional prefabricated containers have the problem that they are time-consuming to assemble, as they require the preparation of adhesives and heating devices for welding. In addition, when food is placed in the container, there is a risk that some of the adhesive or welding resin may adhere to the food, posing a hygiene issue.

Patent No. 3608647 Patent No. 6967262

The present invention was made to solve these problems, and provides an assembled container that can be easily assembled without using adhesives or the like.

An assembled container according to a first aspect of the present invention is an assembled container formed by folding a planar sheet,
A bottom surface portion that is substantially rectangular and forms a bottom wall;
Four side surfaces that are connected to each side of the bottom surface portion via fold lines and form side walls;
four engaging pieces that are arranged corresponding to the vertices of the bottom surface portion, connect the two side surfaces adjacent to the vertices, and are folded along an extension of a diagonal line of the bottom surface;
At least two of the four side portions have a notch formed therein,
The four engaging pieces are folded back to the outside of the side surface, and the tip portion of each of the engaging pieces is inserted into the notch and engaged with the side surface.

In the assembled container according to the present invention, the tip of the engagement piece that connects the side portions is inserted into a notch formed in the side portion and engaged with the side portion. This allows the assembled container according to the present invention to be made by simply folding a flat sheet in a specified manner without using adhesives or the like, and the box-shaped shape is firmly maintained. In addition, since no adhesives or the like are required for assembly, it has good safety in terms of hygiene.

Also, for example, the four side portions may be composed of a first side portion and a second side portion which are opposed to each other and in which the cut is formed, and a third side portion and a fourth side portion which are oriented in a direction substantially perpendicular to the first side portion and the second side portion and which are opposed to each other,
Two of the four engagement pieces may be engaged with the first side surface portion, and the other two of the four engagement pieces may be engaged with the second side surface portion.

In such an assembled container, the third and fourth side sections do not engage with any of the engaging pieces, and no cuts need to be formed. Therefore, even when used as a cup for holding liquid, the third or fourth side section can be used as a drinking spout or pouring spout, preventing the engaging pieces from getting in the way during use, and allowing for convenient use.

Furthermore, for example, the length L1 from the top edge portion to the bottom surface portion of the first side portion and the second side portion may be longer than the length L2 from the top edge portion to the bottom surface portion of the third side portion and the fourth side portion.

In this type of assembled container, the first and second side portions in which the cuts are formed are long, so the strength of the areas surrounding the cuts can be adequately ensured. Therefore, the cuts in this type of assembled container adequately hold the engagement pieces, and the container has good strength and durability.

Also, for example, the notch may be formed in an area within one-third of the upper edge portion of the first side portion and the second side portion.

In this type of assembled container, the cut is formed on the upper end side of the container, so that when liquid or the like is poured into the container, the problem of liquid leaking out of the container through the cut can be prevented, at least until the level of the poured liquid reaches less than two-thirds of the depth of the container.

Also, for example, the cut may have a curved shape in which the distance between the center of the cut and the bottom surface is greater than the distance between both ends of the cut and the bottom surface.

By making the cuts in this way, the tips of the two engaging pieces that are inserted into the cuts are both inserted deeper into the cuts, so that the cuts properly hold the engaging pieces in place, giving the assembled container good strength and durability.

For example, when the sheet is unfolded flat, the length L3 from the outer edge separation position of each of the engagement pieces that is farthest from the center of the bottom surface to the center of the bottom surface may be longer than the length L4 from the upper edge separation position that is farthest from the center of the bottom surface to the center of the bottom surface on the third side surface portion and the fourth side surface portion.

Since the engaging piece of this type of assembled container is long, the tip of the engaging piece can be inserted deep into the notch, and the notch properly holds the engaging piece, providing good strength and durability.

Also, for example, at least a pair of outer edge cuts or outer edge notches may be formed in the outer edge of each of the engagement pieces and disposed substantially symmetrically with respect to the extension line passing through the engagement pieces,
When the sheet is spread out flat, the length L5 from the deepest part of the outer edge notch or the outer edge cutout closest to the center of the bottom surface portion to the center of the bottom surface portion may be shorter than the length L6 from the outer end of the connection edge between the engagement piece portion and the side surface portion to which the engagement piece portion is connected to the center of the bottom surface portion.

In such assembled containers, the outer edge notch or outer edge cutout formed on the outer edge of the engaging piece can engage with the notch in the side surface, so that the engaging piece is firmly fixed to the side surface. Therefore, such assembled containers have very good strength and durability, even without the use of adhesives, etc.

An assembled container according to a second aspect of the present invention is an assembled container formed by folding a planar sheet,
A bottom surface portion that is substantially rectangular and forms a bottom wall;
Four side surfaces that are connected to each side of the bottom surface portion via fold lines and form side walls;
four engaging pieces arranged corresponding to the vertices of the bottom surface portion, connecting the two side surfaces adjacent to the vertices, and folded along an extension of a diagonal of the bottom surface portion;
At least two of the four side portions are provided with side joint pieces extending from upper edges of the side portions,
The four engaging pieces are folded back to the outside of the side surface, the side joint pieces engage with the engaging pieces, and the engaging pieces engage with the outside of the side surface.

In this type of assembled container, the side joint piece extending from the upper edge of the side part engages with the engagement piece part, which engages with the outside of the side part, so that it can be made by simply folding a flat sheet in a specified manner without using adhesives, and the box-shaped shape is firmly maintained. In addition, since there is no need to form cuts in the side part of the container, it is possible to prevent the problem of liquid leaking out from the side part when, for example, liquid is poured into the container.

FIG. 1 is a perspective view of an assembled container according to a first embodiment. FIG. 2 is an exploded view of the assembled container shown in FIG. FIG. 3 is a conceptual diagram in which folding lines showing how to fold the assembled container are added to the development view of the assembled container shown in FIG. FIG. 4 is a first conceptual diagram showing how to fold the assembled container shown in FIG. FIG. 5 is a second conceptual diagram showing how to fold the assembled container shown in FIG. FIG. 6 is a perspective view showing the shape of the assembled container shown in FIG. 1 in a folded state. FIG. 7 is a perspective view showing an assembled container according to a second embodiment of the present invention. FIG. 8 is an exploded view of the assembled container shown in FIG. FIG. 9 is a development view of an assembled container according to a first modified example. FIG. 10 is a development view and a perspective view of an assembled container according to a second modified example. FIG. 11 is a perspective view of an assembled container according to the third modified example. FIG. 12 is a development view of the assembled container according to the fourth and fifth modified examples. FIG. 13 is a perspective view of an assembled container according to the fourth and fifth modified examples. FIG. 14 is a conceptual diagram of an assembled container according to the sixth modified example.

First embodiment FIG. 1 is a perspective view showing an assembled container 10 according to a first embodiment of the present invention. The assembled container 10 is formed by folding a planar sheet as shown in FIG. 2. The sheet constituting the assembled container 10 is not particularly limited as long as it is a thin planar body that can be folded, and examples thereof include paper to which vegetable fibers or other fibers are glued, plastic sheets, and the like. In addition, it is preferable from the viewpoint of ease of production and sustainability that the sheet constituting the assembled container 10 is planar paper, and the assembled container 10 is a paper container. In this case, by using thick or water-resistant paper as the paper constituting the sheet, the strength of the assembled container 10 as a paper container is improved. In addition, the fiber used for the paper constituting the assembled container 10 as a paper container may be chemical fiber or inorganic fiber, but it is preferable to use natural vegetable fiber because it has good biodegradability and is environmentally friendly.

As shown in FIG. 1, the assembled container 10 has a box shape with an open top and a bottom portion 20 and side portion 30 that are each substantially rectangular. FIG. 2 is an exploded view of the assembled container 10 shown in FIG. 1. As shown in FIG. 2, the bottom portion 20 is located substantially in the center when the assembled container 10 is exploded. The bottom portion 20 is substantially rectangular and constitutes the bottom wall of the assembled container 10 shown in FIG. 1.

As shown in FIG. 1, the four side portions 30 are made up of a first side portion 31, a second side portion 32, a third side portion 33, and a fourth side portion 34, and form the side walls of the assembled container 10. As shown in FIG. 2, the first side portion 31, the second side portion 32, the third side portion 33, and the fourth side portion 34 are connected to each side 21 of the bottom portion 20 via fold lines 21a.

Figure 3 is a conceptual diagram in which folding lines showing how to fold the assembled container 10 are added to the development view of the assembled container 10 shown in Figure 2. In Figure 3, the dashed and dotted lines indicate the parts that will be mountain folded, and the dashed lines indicate the parts that will be valley folded. Note that in Figures 2 and 3, the top of the paper shows the side that will become the front when the assembled container 10 is in the state shown in Figure 1.

As shown in FIG. 3, the fold lines 21a formed at the connection portions between the first side portion 31, the second side portion 32, the third side portion 33, and the fourth side portion and each side 21 of the bottom portion 20 are mountain folds.

As shown in Figures 1 to 3, the four side portions 31 to 34 of the assembled container 10 are composed of a first side portion 31 and a second side portion 32 that face each other and have cuts 31a, 32a formed therein, and a third side portion 33 and a fourth side portion 34 that face each other and are substantially perpendicular to the first side portion 31 and the second side portion 32. In this way, in the assembled container 10, the cuts 31a, 32a are formed in at least two of the four side portions 31 to 34, the first side portion 31 and the second side portion 32, and no cuts are formed in the remaining third side portion 33 and the fourth side portion 34. However, unlike the assembled container 10, cuts may be formed in all of the four side portions, the first to fourth side portions (see Figures 7 and 8).

As shown in FIG. 1, the cut 31a of the assembled container 10 is formed by a cut line formed on the first side surface portion 31 so as to connect two predetermined points in the first side surface portion 31. Similarly, the cut 32a is formed by a cut line formed on the second side surface portion 32 so as to connect two predetermined points in the second side surface portion 32. As shown in FIG. 2, small holes may be formed at both ends of the cuts 31a and 32a. By forming such holes, the assembled container 10 can prevent a problem in which force is concentrated in narrow areas at both ends of the cuts 31a and 32a during assembly, etc., as described below, and both ends of the cuts 31a and 32a are torn.

As shown in FIG. 1, the tip portions of the engagement pieces 40 are inserted into the notches 31a, 32a. The four engagement pieces 40 are held by the first side portion 31 and the second side portion 32 while engaged with the notches 31a, 32a, so that the box-shaped shape shown in FIG. 1 can be maintained. The detailed shape of the notches 31a, 32a will be described later.

As shown in FIG. 2, the four engagement pieces 40 are composed of a first engagement piece 41, a second engagement piece 42, a third engagement piece 43, and a fourth engagement piece 44. The engagement pieces 41 to 44 are arranged corresponding to each vertex 22 of the bottom surface portion 20, and connect two side surface portions 31 to 34 adjacent to the vertex 22. That is, the first engagement piece 41 connects the first side surface portion 31 and the third side surface portion 33, and the second engagement piece 42 connects the second side surface portion 32 and the third side surface portion 33. In addition, the third engagement piece 43 connects the second side surface portion 32 and the fourth side surface portion 34, and the fourth engagement piece 44 connects the first side surface portion 31 and the fourth side surface portion 34.

As shown in Figures 2 and 1, in the assembled container 10, the first to fourth engagement pieces 41 to 44 are folded along extension lines 41b, 42b, 43b, and 44b of the diagonal line 23 of the bottom surface portion 20. Since each extension line 41b, 42b, 43b, and 44b passes through the center of the corresponding first to fourth engagement pieces 41 to 44, the first to fourth engagement pieces 41 to 44 are folded in half along the extension lines 41b, 42b, 43b, and 44b.

As shown in FIG. 1, the four engagement pieces 41, 42, 43, 44 that are folded in half are folded back to the outside of the first side surface portion 31 or the second side surface portion 32 where the notches 31a, 32a are formed. That is, the first engagement piece 41 and the fourth engagement piece 44 are folded back to the outside of the first side surface portion 31, and the second engagement piece 42 and the third engagement piece 43 are folded back to the outside of the second side surface portion 32.

Furthermore, the tip portions 41a, 44a of the first engaging piece 41 and the fourth engaging piece 44 folded back to the outside of the first side surface portion 31 are inserted into the notch 31a formed in the first side surface portion 31 and engaged with the first side surface portion 31. Similarly, the tip portions 42a, 43a of the second engaging piece 42 and the third engaging piece 43 folded back to the outside of the second side surface portion 32 are inserted into the notch 32a formed in the second side surface portion 32 and engaged with the second side surface portion 32. In this way, the assembled container 10 shown in FIG. 1 is formed by folding from a flat sheet state as shown in FIG. 2. The folding method of the assembled container 10 will be described in detail later.

As shown in Figs. 1 and 2, the notches 31a, 32a formed in the first side portion 31 and the second side portion 32 are preferably formed in an area R1 (shown in gray in Fig. 3) within one-third of the height direction of the upper edges 31b, 32b of the first side portion 31 and the second side portion 32. By arranging the notches 31a, 32a near the upper edges 31b, 32b, when the assembled container 10 is used as a container for holding liquid, the contained liquid is less likely to come into contact with the notches 31a, 32a.

2, the length L1 from the upper edge portions 31b, 32b to the bottom surface portion 20 in the first side portion 31 and the second side portion 32 in which the notches 31a, 32a are formed is longer than the length L2 from the upper edge portions 33b, 34b to the bottom surface portion 20 in the third side portion 33 and the fourth side portion 34 in which the notches 31a, 32a are not formed. In the assembled container 10 in which the heights of the first side portion 31 and the second side portion 32 are higher than the third side portion 33 and the fourth side portion 34, it is possible to form the notches 31a, 32a at a position farther away from the bottom surface portion 20. Therefore, when the assembled container 10 is used as a container for holding liquid, the contained liquid is less likely to come into contact with the notches 31a, 32a, and the problem of the contained contents leaking from the notches 31a, 32a can be prevented. Furthermore, in this type of assembled container 10, even if the cuts 31a and 32a are formed at a position away from the bottom surface portion 20, the width from the cuts 31a and 32a to the upper edge portions 31b and 32b can be appropriately secured, thereby increasing the strength of the assembled container 10.

When the upper edge portions 31b, 32b of the first and second side portions 31, 32 are not parallel to the edge 21 of the bottom portion 20 to which the first and second side portions 31, 32 are connected, as in the assembled container 10 shown in FIG. 2, the length L1 from the upper edge portions 31b, 32b to the bottom portion 20 can be considered as the overall average value. The same applies to the length L2.

In the assembled container 10 shown in FIG. 1, the first engaging piece 41 and the fourth engaging piece 44, which are two of the four engaging pieces 41, 42, 43, and 44, are engaged with the first side surface portion 31, and the other two of the four engaging pieces 41, 42, 43, and 44, which are the second engaging piece 42 and the third engaging piece 43, are engaged with the second side surface portion 32. Therefore, in the assembled container 10, as described above, the length L1 of the first side surface portion 31 and the second side surface portion 32 is different from the length L2 of the third side surface portion 33 and the fourth side surface portion 34. However, the assembled container is not limited to such a shape, and the length L1 and the length L2 may be the same (for example, see the assembled container 110 shown in FIG. 7).

As shown in FIG. 2, when the sheet constituting the assembled container 10 is unfolded in a plane, the four engagement pieces 41, 42, 43, 44 are arranged in the diagonal 23 direction of the bottom surface 20, while the four side surfaces 31, 32, 33, 34 are connected to each side 21 of the bottom surface 20. As shown in FIG. 2, it is preferable that the length L3 from the outer edge separation position 41ca, which is the furthest from the center 24 of the bottom surface 20, of the first engagement piece 41 to the center 24 of the bottom surface 20 is longer than the length L4 from the upper edge separation position 33c, which is the furthest from the center 24 of the bottom surface 20, of the third side surface 33 and the fourth side surface 34 to the center 24 of the bottom surface 20. The same is true for the second to fourth engagement pieces 42 to 44 other than the first engagement piece 41.

In an assembled container 10 in which the lengths L3 and L4 are in this relationship, the tip portions 41a-44a of the engagement pieces 41-44, which are folded in half at the extension lines 41b-44b, can be inserted deep into the notches 31a, 32a as shown in FIG. 1. Therefore, even if the assembled container 10 is bent due to, for example, the weight of the contents, the assembled container 10 can prevent the engagement between the engagement pieces 41-44 and the notches 31a, 32a from being unexpectedly released.

As shown in FIG. 2, at least a pair of outer edge notches 41d, 42d are formed in the outer edge portions 41c, 42c of the first and second engagement pieces 41, 42, respectively, and are arranged substantially symmetrically with respect to the extension lines 41b, 42b passing through the first and second engagement pieces 41, 42. The pair of outer edge notches 41d, 42d are arranged substantially symmetrically with respect to the extension lines 41b, 42b, so that they overlap with each other when the engagement pieces 41, 42 are folded in half along the extension lines 41b, 42b as shown in FIG. 1.

As shown in FIG. 2, when the sheet constituting the assembled container 10 is unfolded in a flat state, the length L5 from the deepest part 41da of the outer edge cutout 41d formed in the first engaging piece 41 closest to the center 24 of the bottom surface part 20 to the center 24 of the bottom surface part 20 is shorter than the length L6 from the outer end part 51aa of the connection edge part 51a between the first engaging piece 41 and the first side surface part 31 to which the first engaging piece 41 is connected to the center 24 of the bottom surface part 20. This relationship is also the same for the outer edge cutout 42d formed in the second engaging piece 42. The fourth engaging piece 44 has a shape symmetrical to the first engaging piece 41, and the third engaging piece 43 has a shape symmetrical to the second engaging piece 42.

By forming such outer edge notches 41d, 42d on each of the engagement pieces 41-44, the tip portions 41a-44a of the engagement pieces 41-44 can be inserted deeply into the notches 31a, 32a as shown in FIG. 1. In addition, by forming the outer edge notches 41d, 42d, the engagement between the engagement pieces 41-44 and the notches 31a, 32a is strengthened, which prevents the engagement between the engagement pieces 41-44 and the notches 31a, 32a from being unexpectedly released.

Furthermore, as shown in FIG. 2, in the assembled container 10, the notch 31a formed in the first side surface portion 31 has a curved shape in which the distance between the notch center portion 31aa and the bottom surface portion 20 is greater than the distance between the notch end portions 31ab and the bottom surface portion 20. The same is true for the notch 32a formed in the second side surface portion 32. By having the notches 31a and 32a have such a curved shape, in the assembled container 10, a larger area of the engagement pieces 41 to 44 can be inserted above the notches 31a and 32a. In addition, the distance between the notch end portions 31ab and the engagement pieces 41 to 44 can be appropriately reduced. Therefore, in such an assembled container 10, the engagement between the engagement pieces 41 to 44 and the notches 31a and 32a is more secure, and the problem of the engagement between the engagement pieces 41 to 44 and the notches 31a and 32a being unexpectedly released can be more effectively prevented.

The method for producing the assembled container 10 will be described with reference to Figures 3 to 5. In the method for producing the assembled container 10, first, a flat sheet having a shape as shown in Figure 2 is prepared. The incisions 31a and 32a are preferably formed at predetermined positions before folding of the sheet begins, but they can also be formed after folding of the sheet begins. In addition, the boundaries between the bottom portion 20, the side portions 31 to 34, and the engagement pieces 41 to 44 may be indicated by printed lines or embossed grooves on the front or back surface of the sheet. However, the front surface of the sheet may display a pattern, design, picture, photograph, etc. other than the boundary lines, and the front surface of the sheet may be plain.

Also, as shown in FIG. 3, the surface of the sheet that is the raw material for the assembled container 10 may have the boundaries between the bottom surface portion 20, the side surfaces 31-34, and the engagement pieces 41-44 marked with mountain folds or valley folds.

Next, the sheet as shown in Fig. 2 and Fig. 3 is folded into a predetermined shape. More specifically, as shown by the dashed lines in Fig. 3, each side 21 of the bottom surface portion 20, the connecting sides 51b on both sides of the third side surface portion 33 and the fourth side surface portion 34, and the extension lines 41b to 44b passing through the center of the engagement pieces 41 to 44 are mountain folded. Also, as shown by the dashed lines in Fig. 3, the connecting sides 51a on both sides of the first side surface portion 31 and the second side surface portion 32 are valley folded. Note that the diagonal line 23 of the bottom surface portion 20 may be mountain folded together with the extension lines 41b to 43, but in the state of the assembled container 10 shown in Fig. 1, the mountain fold of the diagonal line 23 is returned to its original state and the bottom surface portion 20 becomes flat.

Figure 4 is a first conceptual diagram showing how to fold the assembled container 10 shown in Figure 1. Figure 4 shows an intermediate state from the flat sheet state shown in Figures 2 and 3 to the assembled container 10 shown in Figure 1. As can be understood from a comparison of Figures 3 and 4, by mountain-folding each side 21 of the bottom surface portion 20, the first to fourth side surface portions 31 to 34 rise upward relative to the bottom surface portion 20. In addition, the engagement pieces 41 to 44 are folded in half along the extension lines 41b to 44b. Furthermore, as shown by the arrow 61 in Figure 5, the first engagement piece 41 and the fourth engagement piece 44 that are folded in half are folded back to the outside of the first side surface portion 31, and as shown by the arrow 62, the second engagement piece 42 and the third engagement piece 43 that are folded in half are folded back to the outside of the second side surface portion 32.

Finally, the tip portions 41a, 44a of the first engaging piece 41 and the fourth engaging piece 44 are inserted from the outside to the inside into the notch 31a of the first side portion 31, and the tip portions 42a, 43a of the second engaging piece 42 and the third engaging piece 43 are inserted from the outside to the inside into the notch 32a of the second side portion 32 to obtain the assembled container 10 shown in FIG. 1.

Figure 5 is a second conceptual diagram showing how to fold the assembled container 10 shown in Figure 1. As shown in Figure 5, in the assembled container 10, the engagement pieces 41-44 connecting two adjacent side portions 31-34 are inserted into and engaged with the notch 31a of the first side portion 31 or the notch 32a of the second side portion 32. In Figure 5, the state in which the first engagement piece 41 is engaged with the notch 31a of the first side portion 31 and the state in which the second engagement piece 42 and the third engagement piece 43 are engaged with the notch 32a of the second side portion 32 are shown by virtual lines (two-dot chain lines).

Such an assembled container 10 can be easily assembled from the flat sheet state shown in FIG. 2 into the box-shaped shape shown in FIG. 1 without using adhesives or heat welding. Furthermore, in the assembled container 10, no cuts are formed in the third side portion 33 and the fourth side portion 34, and when used as a cup or the like, the third side portion 33 and the fourth side portion 34 can be suitably used as a drinking spout. Furthermore, even though no adhesives or the like are used in the assembled container 10, the engaging pieces 41 to 44 are inserted into the cuts 31a, 32a, and the engaging pieces 41 to 44 are securely fixed to the first side portion 31 or the second side portion 32. Therefore, the assembled container 10 has good strength to withstand a variety of uses.

The assembled container 10 can be easily prepared from a flat sheet as shown in FIG. 2 when needed, making it easy to carry and compact for repeated use. FIG. 6 shows the assembled container 10 shown in FIG. 1 folded flat. The assembled container 10 has a bottom portion 20 and two opposing third and fourth side portions 33 and 34 that are composed of a single wall that is not folded over, so that it can be easily folded compactly as shown in FIG. 6 without releasing the engagement between the engagement pieces 41 to 44 and the notches 31a and 32a. From this perspective, the assembled container 10 can be used as a compact and convenient container in a variety of situations, including outdoor activities such as camping and outdoor barbecues.

Second embodiment Fig. 7 is a perspective view of an assembled container 110 according to a second embodiment of the present invention, and Fig. 8 is a development view of the assembled container 110. The assembled container 110 shown in Figs. 7 and 8 has notches 131a to 134a formed in all of the first to fourth side surface portions 131 to 134, and one of the first to fourth engagement pieces 141 to 144 is inserted into each of the notches 131a to 134a, which is different from the assembled container 10 shown in Figs. 1 and 2. However, the assembled container 110 is similar to the assembled container 10 according to the first embodiment in terms of the structure of the bottom surface portion 20, etc. The description of the assembled container 110 will be centered on the differences from the assembled container 10, and the description of the commonalities with the assembled container 10 will be omitted.

The assembled container 110 shown in Figures 7 and 8, like the assembled container 10 shown in Figures 1 and 2, has a substantially rectangular bottom surface portion 20 that forms the bottom wall of the container, four side surface portions 130 that connect to each side 21 of the bottom surface portion 20 and form side walls, and four engagement pieces 140 that connect two adjacent side surface portions. The four side surface portions 130 are made up of a first side surface portion 131, a second side surface portion 132, a third side surface portion 133, and a fourth side surface portion 134, and the four engagement pieces 140 are made up of a first engagement piece portion 141, a second engagement piece portion 142, a third engagement piece portion 143, and a fourth engagement piece portion 144.

As shown in FIG. 8, a notch 131a is formed in the first side surface portion 131, a notch 132a is formed in the second side surface portion 132, a notch 133a is formed in the third side surface portion 133, and a notch 134a is formed in the fourth side surface portion 134. That is, one notch 131a to 134a is formed in each of the four side surface portions 131 to 134.

As shown in FIG. 8, the first engagement piece 141 is connected to one of the vertices 22 of the bottom surface portion 20, and connects the first side surface portion 131 adjacent to that vertex 22 with the third side surface portion 133. The first engagement piece 141 is folded along an extension line 141b of the diagonal line 23 of the bottom surface portion 20, and is further folded back to the outside of the first side surface portion 131 adjacent in the clockwise rotation direction in FIG. 8. In addition, the tip portion 141a of the first engagement piece 141 is inserted into the notch 131a of the first side surface portion 131, and the first engagement piece 141 is engaged with the first side surface portion 131 as shown in FIG. 7.

The second engagement piece 142, the third engagement piece 143, and the fourth engagement piece 144 shown in FIG. 8 are folded in half at the extension lines 142b, 143b, and 144b in the same manner as the first engagement piece 141, and are engaged with the third side surface portion 133, the second side surface portion 132, and the fourth side surface portion 134 that are adjacent in the right rotation direction in FIG. 8. That is, the tip portion 142a of the second engagement piece 142 is inserted into the notch 133a of the third side surface portion 133, the tip portion 143a of the third engagement piece 143 is inserted into the notch 132a of the second side surface portion 132, and the tip portion 144a of the fourth engagement piece 144 is inserted into the notch 134a of the fourth side surface portion 134.

As shown in FIG. 8, the outer edge 141c of the first engagement piece 141 has a pair of outer edge notches (or outer edge cuts) 141d that are arranged approximately symmetrically with respect to the extension line 141b. By forming the outer edge notches 141d on the outer edge 141c of the first engagement piece 141, as shown in FIG. 7, the problem of the first engagement piece 141 and the cut 131a unintentionally coming out of engagement can be preferably prevented. The outer edge parts 142c to 144c of the second to fourth engagement pieces 142 to 144 also have outer edge cuts 142d to 144d similar to those of the first engagement piece 141.

The assembled container 110 shown in FIG. 7 has side sections 131-134 that are rotationally symmetrical with respect to each other, so there is little bias in the partial strength of the assembled container 110, and it has excellent strength and durability. In addition, the assembled container 110 has the same effects as the assembled container 10 in terms of the points in common with the assembled container 10.

The assembled containers 10, 110 shown in Figures 1 to 8 are merely examples, and it goes without saying that the technical scope of the present invention includes many other embodiments and modifications. For example, as shown in Figures 1 and 7, the side portions 30, 130 of the assembled containers 10, 110 are slightly inclined outward, and have a shape in which the area of the opening above the container is wider than the bottom portion 20. However, the shape of such assembled containers 10, 110 can be changed, for example, by adjusting the angle of the connecting edges 51a, 51b shown in Figure 2, and the side portions 30, 130 may be inclined more outward, or may be completely perpendicular to the bottom portion 20.

In addition, multiple notches may be formed in each side portion 131-134 of the assembled container 110, and the notch into which each side portion 131-134 is inserted may be selectable depending on the inclination angle of the side portion 130.

Figure 9 is a development view of an assembled container 210 according to a first modified example of the assembled container 10 shown in Figures 1 and 2. The assembled container 210 differs from the assembled container 10 in that the outer edge portions 41c to 42c have outer edge notches 41d to 42d formed therein, in that the outer edge portions 241d to 244d of the engaging pieces 241 to 244 have outer edge notches 241d to 244d formed therein, but is otherwise similar to the assembled container 10 shown in Figure 2. In the explanation of the assembled container 210, only the differences from the assembled container 10 will be explained, and the points in common with the assembled container 10 will not be explained.

The assembled container 210 shown in FIG. 9 has outer edge notches 241d-244d formed on the outer edge of the engaging pieces 241-244, which increases the engagement strength of the engaging pieces 241-244 with the notches 31a, 32a. Therefore, with such an assembled container, even if the insertion depth of the engaging pieces 241-244 into the notches 31a, 32a is shallow, the problem of the engaging pieces 241-244 unintentionally disengaging from the notches 31a, 32a can be prevented.

In addition, the assembled container 210 of the first modified example has the same effects as the assembled container 10 in terms of the commonalities with the assembled container 10.

Figure 10(a) is an exploded view of an assembled container 310 according to the second modified example, and Figure 10(b) is a perspective view of the assembled container 310. The assembled container 310 differs from the assembled container 10 according to the first embodiment in that a pattern is printed on the surface and that the first engaging piece 341 and the third engaging piece 343 have handles 341e and 343e. In the explanation of the assembled container 310, only the differences from the assembled container 10 will be explained, and the points in common with the assembled container 10 will not be explained.

As shown in FIG. 10, a picture or pattern may be printed on the surface of the assembled container 310. The picture or pattern on the assembled container 310 changes the appearance of the container, adding value, and also serves as a guide when creating the assembled container 310 from a sheet.

As shown in FIG. 10(a), the handles 341e, 343e are formed at the tip portions of the first and third engagement pieces 341, 343 of the assembled container 310. The handles 341e, 343e are formed symmetrically with respect to the extension lines 41b, 43b, so that they overlap in the assembled state to form a double structure, thereby increasing strength. As shown in FIG. 10(b), in the assembled state of the assembled container 310, the first and third engagement pieces 341, 343 pass through the notches 31a, 32a formed in the first and second side portions 31, 32, and the handles 341e, 343e formed at the tip portions extend above the assembled container 310.

As shown in FIG. 10(a), the second engagement piece 342 and the fourth engagement piece 344 of the assembled container 310 have outer edge cutouts 342d and 344d, unlike the assembled container 10 shown in FIG. 2. In contrast, the first engagement piece 341 and the third engagement piece 343 of the assembled container 310 have outer edge cutouts 341d and 343d, similar to the assembled container 10 shown in FIG. 2.

The second and fourth engagement pieces 342 and 344 do not have handles and the tip ends are inserted shallowly into the cuts 31a and 32a, so outer edge cuts 342d and 344d can be formed to increase the engagement strength with the cuts 31a and 32a. On the other hand, the first and third engagement pieces 341 and 343 have handles 341e and 343e and the tip ends are inserted deep into the cuts 31a and 32a, so outer edge cuts 341d and 343d are formed to allow the handles 341e and 343e to move moderately.

The assembled container 310 is easy to carry because the handles 341e, 343e are formed at the tip portions of the first engaging piece 341 and the third engaging piece 343, and the problem of the engagement between the first and third engaging pieces 341, 343 and the first and second side portions 31, 32 being unexpectedly released can be prevented. In addition, the assembled container 310 according to the second modified example has the same effects as the assembled container 10 in terms of the points in common with the assembled container 10.

Figure 11 is a perspective view of an assembled container 410 according to a third modified example of the present invention. The assembled container 410 shown in Figure 11 differs from the assembled container 110 shown in Figures 7 and 8 in that the side joint pieces 430 extending from the upper edge parts 430b of the side parts 430 engage with the four engagement pieces 440. However, the assembled container 410 is similar to the assembled container 110 according to the second embodiment in terms of the structure of the bottom part 20, etc. The description of the assembled container 410 will focus on the differences from the assembled container 110, and the description of the commonalities with the assembled container 110 will be omitted.

As shown in FIG. 11, the assembled container 410, like the assembled container 110 shown in FIG. 7 and FIG. 8, has four side portions 430 that connect to the substantially rectangular bottom portion, and four engagement pieces 440 that connect two adjacent side portions. The four engagement pieces 440 are folded in half and folded back to the outside of the adjacent side portion 430 in the clockwise rotation direction.

At least two of the four side portions 430 (all four in this embodiment) are provided with side engagement pieces 430f extending from the upper edge portion 430b of the side portion 430. In the assembled container 410, the side engagement pieces 430f engage with the engagement piece portion 440, so that the engagement piece portion 440 is engaged with the outside of the side portion 430. More specifically, the side engagement pieces 430f are inserted into the engagement piece notches 440f formed in the engagement piece portion 440, so that the engagement piece portion 440 is fixed to the outside of the side portion 430.

The assembled container 410 shown in FIG. 11 can be easily assembled from a flat sheet into the box-shaped shape shown in FIG. 11 without using adhesives or the like, similar to the assembled container 110 shown in FIG. 7 and FIG. 8. The assembled container 410 tends to be weaker than the assembled container 110 in terms of fixing the engagement piece portion 440, but since there is no need to form a cut in the side portion 430, it is possible to prevent the problem of contents leaking from part of the side portion even when an object containing liquid is stored inside.

The assembled container 410 is not limited to the form shown in FIG. 11 in which one engaging piece 440 is fixed to one side surface 430, as in the assembled container 110 shown in FIGS. 7 and 8. It is also possible to adopt a form in which two engaging pieces are fixed to each of a pair of opposing side surfaces, as in the assembled container 10 shown in FIGS. 1 and 2. In addition, the assembled container 410 has the same effects as the assembled container 110 in terms of the points in common with the assembled container 110.

Figure 12(a) is an exploded view of an assembled container 510 according to a fourth modified example, and Figure 12(b) is an exploded view of an assembled container 610 according to a fifth modified example. The assembled containers 510 and 610 differ from the assembled container 10 according to the first embodiment in that they have a pattern printed on their surfaces and have lids 571, 572, and 671, but are otherwise similar to the assembled container 10. In the explanation of the assembled containers 510 and 610, only the differences from the assembled container 10 will be explained, and the points in common with the assembled container 10 will be omitted.

As shown in FIG. 12(a), the assembled container 510 has a lid portion 571 connected to the upper edge portion 33b of the third side portion 33 and a lid portion 572 connected to the upper edge portion 34b of the fourth side portion 34. FIG. 13 is a perspective view of the assembled containers 510 and 610. As shown in FIG. 13, the lid portions 571 and 572 are folded in a mountain fold at the upper edge portions 33b and 34b to function as a lid that closes the opening of the assembled container 510. The lid portions 571 and 572 have lid portion notches 571a and 572a formed therein. When the opening of the assembled container 510 is closed by the lid portions 571 and 572 as shown in FIG. 13, the lid portion notches 571a and 572a can be engaged with each other. In this way, the lid portion notches 571a and 572a function as stoppers that prevent the lid portions 571 and 572 from being easily opened.

As shown in FIG. 12(b), the assembled container 610 has a lid 671 that connects to the upper edge 33b of the third side surface 33. As shown in FIG. 13, the lid 671 is folded in a mountain fold at the upper edge 33b to function as a lid that closes the opening of the assembled container 610. A lid notch 671a is formed in the lid 671. As shown in FIG. 13, by opening the lid notch 671a, the surrounding area of the lid notch 671a functions as a knob when opening and closing the lid 671.

The assembly container 510 and the assembly container 610 have lids 571, 572, and 671, so that it is possible to prevent the contents from being exposed to the outside air, etc. In addition, the assembly container 510 and the assembly container 610 have the same effects as the assembly container 10 in terms of the points they have in common with the assembly container 10.

Figure 14 is a conceptual diagram of an assembled container 710 according to a sixth modified example of the present invention. Figure 14(a) shows a plurality of members constituting a planar sheet for folding the assembled container 710, and Figure 14(b) shows a completed planar sheet for forming the assembled container 710 by joining the members shown in Figure 14(a). The assembled container 710 differs from the assembled container 10 shown in Figure 1 in that the planar sheet is made by joining together a first portion 710a, a second portion 710b, a third portion 710c, and a fourth portion 710d, which are originally separate portions, but is otherwise similar to the assembled container 10.

As shown in FIG. 14(a) and FIG. 14(b), a large-sized assembly container 710 can be produced by preparing the first part 710a, the second part 710b, the third part 710c, and the fourth part 710d separately and joining them together using a joining material 770 such as an adhesive tape. The large-sized assembly container 710 can be large enough for children and adults to enter, and can be used as a simple shelter for the purpose of protecting privacy in public places or evacuation shelters. In this way, the planar sheet for forming the assembly container 710 is not limited to a single one, and may be a sheet formed by joining multiple parts 710a to 710d. In addition, the assembly container 710 has the same effects as the assembly container 10 in terms of the common points with the assembly container 10.

10, 110, 210, 310, 410, 510, 610, 710...Assembled container 20...Bottom surface 21...Side 21a...Fold line 22...Vertex 23...Diagonal 24...Center 30, 130, 430...Side surface 31, 131...First side surface 32, 132...Second side surface 33, 133...Third side surface 34, 134...Fourth side surface 31a, 32a, 131a, 132a, 133a, 134a...Incision 31aa...Center of incision 31ab...Both ends of incision 31b, 32b, 33b, 34b, 430b...Upper side 33c...Separation position of upper side L1, L2, L3, L4, L5, L6...Length R1...One-third area 40, 140, 440... Engagement piece portion 41, 141, 241, 341... First engagement piece portion 42, 142, 242, 342... Second engagement piece portion 43, 143, 243, 343... Third engagement piece portion 44, 144, 244, 344... Fourth engagement piece portion 41a, 42a, 141a, 142a, 143a... Tip portion 41b, 42b, 141b, 142b, 143b... Extension line 41c, 42c, 141c, 142c, 143c... Outer edge portion 41ca... Outer edge separation position 41d, 42d, 141d, 142d, 143d, 341d, 343d... Outer edge cutout 241d, 242d, 243d, 244d, 342d, 344d...outer edge notch 41da...deepest portion 51a, 51b...connecting edge portion 51aa...outer end portion 61, 62...arrows 341e, 343e...handle portion 430f...side engaging piece 440f...engaging piece notch 571, 572, 671...lid portion 571a, 572a, 671a...lid portion notch

Claims (8)

An assembled container formed by folding a flat sheet,
A bottom surface portion that is substantially rectangular and forms a bottom wall;
Four side surfaces that are connected to each side of the bottom surface portion via fold lines and form side walls;
four engaging pieces that are arranged corresponding to the vertices of the bottom surface portion, connect the two side surfaces adjacent to the vertices, and are folded along an extension of a diagonal line of the bottom surface;
At least two of the four side portions have a notch formed therein,
The four engaging pieces are folded back to the outside of the side surface, and the tip portions of the engaging pieces are inserted into the notches and engaged with the side surface. the four side portions are composed of a first side portion and a second side portion which face each other and in which the cut is formed, and a third side portion and a fourth side portion which face each other and are oriented in a direction substantially perpendicular to the first side portion and the second side portion,
2. The assembled container according to claim 1, wherein two of the four engaging pieces are engaged with the first side surface portion, and the other two of the four engaging pieces are engaged with the second side surface portion. The assembled container according to claim 2, characterized in that the length L1 from the upper edge portion to the bottom surface portion of the first side portion and the second side portion is longer than the length L2 from the upper edge portion to the bottom surface portion of the third side portion and the fourth side portion. The assembled container according to claim 2, wherein the cut is formed in an area within one-third of the upper edge of the first side portion and the second side portion. The assembled container according to claim 2, wherein the cut has a curved shape in which the distance between the center of the cut and the bottom surface is greater than the distance between both ends of the cut and the bottom surface. The assembled container according to claim 2, characterized in that, when the sheet is spread out flat, the length L3 from the outer edge separation position of each of the engagement pieces that is farthest from the center of the bottom surface to the center of the bottom surface is longer than the length L4 from the upper edge separation position that is farthest from the center of the bottom surface to the center of the bottom surface in the third side surface portion and the fourth side surface portion. At least a pair of outer edge cuts or outer edge notches are formed in an outer edge portion of each of the engagement pieces and are arranged substantially symmetrically with respect to the extension line passing through the engagement piece,
The assembled container according to claim 1, wherein, when the sheet is spread out flat, a length L5 from the deepest part of the outer edge cutout or the outer edge notch closest to the center of the bottom surface portion to the center of the bottom surface portion is shorter than a length L6 from the outer end of a connection edge portion between the engagement piece portion and the side surface portion to which the engagement piece portion is connected to the center of the bottom surface portion. An assembled container formed by folding a flat sheet,
A bottom surface portion that is substantially rectangular and forms a bottom wall;
Four side surfaces that are connected to each side of the bottom surface portion via fold lines and form side walls;
four engaging pieces that are arranged corresponding to the vertices of the bottom surface portion, connect the two side surfaces adjacent to the vertices, and are folded along an extension of a diagonal line of the bottom surface;
At least two of the four side portions are provided with side joint pieces extending from upper edges of the side portions,
The four engaging pieces are folded back outside the side surface, the side joint pieces engage with the engaging pieces, and the engaging pieces engage with the outside of the side surface.

Images