JP4463969B2 - Assembly container with water reservoir - Google Patents

Description

[0001]
【Technical field】
The present invention relates to an assembly container with a water reservoir having a hinge structure that can be freely assembled and deployed.
[0002]
[Prior art]
As shown in FIG. 13 and FIG. 14, there is an assembly container 9 in which a bottom plate 91 and a side plate 92 are integrally molded with foamed polystyrene as a storage box for frozen foods and the like. The assembly container 9 is configured such that the bottom plate 91 and the side plate 92 are connected by a hinge portion 93 so that the assembly and deployment can be performed freely. The hinge part 93 includes an M-shaped section shown in FIG. 15 and a V-shaped section (not shown).
[0003]
As shown in FIG. 16 to be described later, the assembly container 9 is integrally formed by arranging a plurality of developed containers. As shown in FIG. 17, a mold 980 used for molding includes an upper mold 96 and a lower mold 97, and a molding cavity 98 is provided between them. The cavity 98 has the same shape as a plurality of deployed assembly containers. By filling the cavity 98 with pre-expanded polystyrene foam particles and foaming, the assembly container 9 is integrally formed.
Since the assembly container can be unfolded into a flat state, it is convenient for transportation.
[0004]
[Problems to be solved]
However, when integrally molding the conventional assembly container, it is necessary to form the assembly container in an unfolded state. For this reason, a large-area mold is required, which hinders improvement in production efficiency.
In addition, since the mold clamping pressure must be applied to a large area, the mold clamping force required for the entire mold is increased.
[0005]
On the other hand, as shown in FIG. 18, it can be considered that the side plate 92 is integrally formed with the bottom plate 91 standing upright. However, in this case, in order to form the hinge portion 93, it is necessary to interpose the slide core 99 between the bottom plate forming surface 981 for forming the bottom plate 91 and the side plate forming surface 982 for forming the side plate 92. For this reason, it takes time to set the slide core.
Further, as shown in FIG. 13, when the food container 90 containing moisture is stored in the assembly container 9, there is a possibility that the moisture 99 of the food may flow out of the assembly container 9. As a result, the transport vehicle is contaminated and work efficiency is deteriorated.
[0006]
SUMMARY OF THE INVENTION In view of the above-described conventional problems, the present invention is intended to provide an assembly container with a water reservoir that can be easily integrally molded in a small space with high efficiency and can prevent outflow of moisture.
[0007]
[Means for solving problems]
The invention of claim 1 is an assembly container in which a rectangular bottom plate and side plates are connected to each side of the bottom plate by a hinge structure , and are integrally molded of synthetic resin,
Between the bottom plate and the side plates, now each side plate is provided a lateral shift piece for shifting each side in the four sides of the bottom plate,
The laterally displaced pieces are connected to the peripheral edge of the bottom plate and the lower end of the side plate by thin connection portions, respectively.
The bottom plate is provided with a water reservoir recess ,
The side shifting piece has a bottom plate contact surface that contacts the bottom plate during assembly, and a side plate contact surface that contacts the side plate during assembly, and the bottom plate contact surface is an inner side of the thin-walled connecting portion. In addition, the side plate contact surface is provided outside the thin-walled connecting portion,
Further, the side plate has a 45-degree inclined surface that makes adjacent side plates contact each other when the side plate is erected on the four sides of the bottom plate through the side-shifting pieces and assembled. The inclined surface is provided with a fitting convex portion and a fitting concave portion so that the side plates are fitted and fixed to each other .
[0008]
The assembly container with a water reservoir according to the present invention has a water reservoir recess in the bottom plate, so that moisture does not flow out even if an article containing moisture is accommodated in the assembly container. Therefore, it is easy to transport the assembly container and there is no risk of contaminating the transport vehicle. It becomes easy to carry.
[0009]
Between the four side plates consecutively provided respectively for each side of the square bottom plate and the bottom plate, with special hinge structure in which a lateral shift piece. The side shifting piece and the bottom plate, and the side shifting piece and the side plate are connected to each other by a thin connection portion. Since the thin-walled connecting portion is a portion that can be bent freely, the laterally shifted piece can be freely rotated with respect to the bottom plate using this as a fulcrum.
[0010]
Rotation of the side shifting piece, not only can change the angle of the side plate freely against the bottom plate, it is possible to shift the relative position of the side plate against the planar direction of the bottom plate. Therefore, at the time of integral molding, the side plate is erected with respect to the bottom plate, and the side plate is shifted from the peripheral edge of the bottom plate to the outside by the width of the piece so that the assembly container is integrated. Can be molded. This eliminates the need for a space for forming the side plate, and allows the base plate and the side plate to be integrally formed in a small space as compared with the case where the bottom plate and the side plate are integrally formed in a deployed state.
[0011]
In addition, the relative position in the planar direction between the standing side plate and the bottom plate can be shifted by the rotation of the side shifting pieces, thereby creating a state in which the vertical projections of the bottom plate and the side plate do not overlap. . By designing a mold that can form the assembly container in this state, the assembly container having a hinge structure can be integrally formed between the bottom plate and the side plate. In addition, such a mold does not require a conventional slide core for forming a hinge part, and can be easily integrally formed.
Furthermore, since a large number of assembly containers can be formed in a small space, the clamping force applied to the entire mold can be reduced.
In use, the side shifting piece is rotated to overlap the side shifting piece on the bottom plate and the side plate. Then, the side plate is erected with respect to the bottom plate, and the assembly container can be assembled.
[0012]
Further, the side plate can be developed in a plane direction with respect to the bottom plate. For this reason, by setting the assembly container in the unfolded state, a large number of assembly containers can be stacked during transportation, and the transportation efficiency is high.
[0013]
Further, the side shifting piece, and the bottom plate that abuts the bottom plate abutting surface at the time of assembly, and having a said side plate abutting the side plate abutting surface when assembled, the bottom plate abutting surface inside of the thin connecting portions to, the side plate abutment surface that provided on the outer side of the thin connecting portions. This facilitates assembly and prevents water leakage during use .
In the present invention, “inside” means the side located inside the assembly container during assembly, and “outside” means the side located outside the assembly container during assembly.
[0014]
The thin-walled connecting part is a part that is thinner and more flexible than both so that the angle between the bottom plate and the side shifting piece and the angle between the side plate and the side shifting piece can be freely adjusted. Preferably there is. Thereby, development, assembly, etc. of a side plate and a side shift piece can be performed freely.
[0015]
The connection part of the thin connection part with respect to a baseplate and a side plate is the peripheral part of a baseplate, and the lower end of a sideplate, respectively.
It is preferable that the side shifting piece is connected to the inner peripheral edge of the bottom plate and the inner lower end of the side plate. Moreover, it is preferable that the said side shift piece is connected with respect to the outer periphery edge of the said baseplate, and the inner side lower end of the said baseplate. In these cases, the side plates and the laterally displaced pieces can be freely developed and assembled.
[0016]
As in the second aspect of the invention, it is preferable that the inner surface of the side wall of the water reservoir recess is flush with the inner surface of the side plate during assembly (see FIG. 10) . Thereby, a water reservoir recessed part becomes wide and a large amount of water can be stored.
The synthetic resin used for the assembly container includes, for example, pre-expanded particles. Examples of the pre-expanded particles include expanded polystyrene resin, expanded polypropylene resin, and expanded polyethylene resin. The pre-expanded particles mean expanded particles before molding.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
An assembly container with a water reservoir according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the assembly container 5 with a water reservoir of this example is a resin molded product in which the bottom plate 1 and the side plate 2 are connected by a hinge structure 30 and integrally molded with a synthetic resin. Between the bottom plate 1 and the side plate 2, a side shift piece 3 for shifting the side plate 2 to the side with respect to the bottom plate 1 is provided. As shown in FIGS. 2 and 3, the side shift piece 3 is connected to the inner peripheral edge 11 of the bottom plate 1 and the inner lower end 21 of the side plate 2 by thin-walled connecting portions 41 and 42, respectively.
The bottom plate 1 is provided with a water reservoir recess 10. As shown in FIG. 10, the water reservoir recess 10 forms the same surface as the inner surface of the side plate 2 during assembly.
[0018]
As shown in FIG. 3, the laterally displaced piece 3 is a quadrangular rod-like body, and has a bottom plate contact surface 31 that contacts the bottom plate 1 during assembly and a side plate contact surface 32 that contacts the side plate 2 during assembly.
As shown in FIG. 4, the side surface 25 of the side plate 2 has an inclination α of 45 ° from the outside toward the inside so as to contact the side surface 25 of the adjacent side plate 2 at the time of assembly. Further, as shown in FIG. 1, the same inclination α as that of the side plate 2 is also attached to both end portions of the side shift piece 3.
As shown in FIG. 4, the side surface 25 of the side plate 2 and the side surface 25 of the adjacent side plate 2 are provided with a fitting convex portion 251 and a fitting concave portion 252 that are fitted to each other.
[0019]
As shown in FIGS. 1 and 3, the bottom plate 1 is a rectangular flat plate, and four side plates 2 are provided on the inner peripheral edge 11 of the four sides via side shift pieces 3 and thin connection portions 41 and 42. It is connected.
As shown in FIGS. 1 and 2, the size of the bottom plate 1 is 420 mm in length A, 280 mm in width B, and 13 mm in thickness C. The side plate 2 has a height D of 120 mm and a thickness E of 13 mm. As shown in FIG. 3, the laterally displaced piece 3 is a rod-like body having a square cross section having a width F of 13 mm and a height of G 13 mm. The height G of the side shifting piece 3 is the same as the thickness E of the side plate 2. Each of the thin connection portions 41 and 42 has a thickness H of 1 mm and a width I of 1 mm. The depth S of the water reservoir recess 10 is 10 mm.
[0020]
A method for integrally forming the assembly container will be described.
First, as shown in FIG. 5, FIG. 6 (a) and FIG. 7, a mold 7 for forming an assembly container is prepared. The mold 7 includes an upper mold 71 and a lower mold 72, and has six cavities 73 for forming an assembly container therebetween. Each cavity 73 has a molding surface 74 having the same shape as the assembly container. The forming surface 74 includes a bottom plate forming surface 741 for forming the bottom plate 1, a side plate forming surface 742 for forming a side plate erected with respect to the bottom plate, and a bottom plate forming surface 741 and the side plate forming surface 742. And a provided offset piece forming surface 743.
[0021]
Further, as shown in FIG. 6B, the molding surface 74 is provided with a connection portion molding surface 744 for molding the thin connection portion 41 between the bottom plate molding surface 741 and the shifted piece molding surface 743. Further, a connecting portion forming surface 745 for forming the thin connecting portion 42 is provided between the side plate forming surface 742 and the shifted piece forming surface 743.
The bottom plate forming surface 741, the side plate forming surface 742, the shifted piece forming surface 743 and the connection portion forming surfaces 744 and 745 form a continuous forming surface 74, and these constitute one cavity 73.
[0022]
As shown in FIG. 7, the cavity 73 is formed between the upper mold 71 and the lower mold 72. The upper mold 71 and the lower mold 72 have an upper mold forming surface 747 and a lower mold forming surface 748 and can be opened and closed in the vertical direction. The cavity 73 is connected to a filling gun 78 for filling the pre-expanded particles 77. The filling gun 78 has a particle supply path 782 for supplying the pre-expanded particles 77, an air supply path 783, and an open / close piston 781.
[0023]
As shown in FIGS. 5 and 6, the size required for one cavity 73 is vertical J 476 mm, horizontal K 336 mm, and height L 133 mm. The vertical J of the cavity 73 is the vertical U of the bottom plate forming surface 741, the thickness V of the side plate forming surface 742 connected to both sides thereof, the width W of the shifted piece forming surface 743, and the lengths of the connecting portion forming surfaces 741 and 742. It is equal to the total value of Y (U + (V + W + 2Y) × 2). The width K of the cavity 743 includes the width T of the bottom plate forming surface 741, the thickness V of the side plate forming surface 742 connected to both sides thereof, the width W of the shifted piece forming surface 743, and the lengths of the connecting portion forming surfaces 741 and 742. It is equal to the total value of Y (T + (V + W + 2Y) × 2). The entire size of the mold 7 is 1030 mm in length M, 1230 mm in width N, and 320 mm in height P.
[0024]
The dimension of the cavity 73 is the same as that of the assembly container to be molded. The length U of the bottom plate forming surface 741, the width T, the thickness V of the side plate forming surface 742, the width W of the shifted piece forming surface 743, and the length Y of the connecting portion forming surfaces 741, 742 are the length B and width of the bottom plate 1 in this order. A, the thickness E of the side plate 2, the width F of the laterally displaced piece 3, and the length I of the thin molding surfaces 41 and 42.
[0025]
Next, as shown in FIG. 8, the upper mold 71 and the lower mold 72 are opened, and a gap 70 (cracking) of 5 to 8 mm is provided therebetween. In this state, the open / close piston 781 is opened, the pre-expanded particles 77 are supplied from the particle supply path 783 and the air 79 is blown from the air supply path 783 to pressure-feed the pre-expanded particles 77 into the cavities 73. .
[0026]
Next, as shown in FIG. 9, the open / close piston 781 is closed. Then, the upper die 71 and the lower die 72 are closed, and the upper die 71 and the lower die 72 are clamped with a hydraulic cylinder under the condition of the clamping force 280N with respect to the entire die. In this state, the pre-foamed particles 77 are foamed by heating to fill the entire cavity 73. Open the mold after cooling.
As described above, the assembly container 5 with a water reservoir can be integrally formed with the side plate 2 shifted laterally from the peripheral edge of the bottom plate 1 and shifted outward by the width F of the piece 3.
[0027]
As shown in the solid line A of FIG. 10, the obtained assembly container 5 with a water reservoir rotates the side shifting piece 3 to abut the bottom plate abutment surface 31 against the bottom plate 1 and to the side plate 2. The side plate is brought into contact with the side plate contact surface 32. Then, the side shift piece 3 and the side plate 2 are erected on the peripheral edge of the bottom plate 1. And as shown in FIG. 4, the fitting convex part 251 and the fitting recessed part 252 which were provided in the side surface 25 of the side plate 2 are mutually fitted. Thereby, the assembly container 5 with a water reservoir can be assembled. As shown in FIG. 11, the assembled container 5 with a water reservoir is placed in a paper case 6 and accommodates a storage product such as food 8 and is then covered with a lid 59 made of foamed resin.
[0028]
During transportation, the side plate 2 is tilted in the same direction as the plane direction of the bottom plate 1 as shown by the dotted line B in FIG. As shown in FIG. 12, the assembly container 5 with a water reservoir in this state is stacked, transported, and stored.
[0029]
The assembly container 5 with a water reservoir of this example is integrally formed with the side plate 2 standing on the bottom plate 1 as described above. For this reason, as shown in FIG. 5, the assembly container 5 with many water sumps can be shape | molded with the one metal mold | die 7. As shown in FIG. Further, as shown in FIG. 6, the assembly container 5 is integrally molded in a state where the side plate forming surface 742 is shifted from the peripheral edge of the bottom plate forming surface 741 and is shifted outward by the width of the piece forming surface 743. For this reason, all parts of the assembly container can be integrally formed without being shaded from the vertical projection. Therefore, there is no need to set the slide core in the mold as in the prior art, and the time and effort of molding can be saved.
Furthermore, since a large number of assembly containers can be formed in a small space, the clamping force applied to the entire mold can be reduced.
[0030]
Moreover, since it has the hinge structure 30 which consists of the side shift piece 3 and the thin connection parts 41 and 42, the angle of the side plate 2 can be changed freely. As a result, deployment and assembly can be performed easily, improving the efficiency of transportation and storage.
Further, since the bottom plate 1 is provided with the water reservoir recess 10, as shown in FIG. 10, even when the food 8 containing the water 81 is accommodated, the water 81 does not flow out of the assembly container 5 with the water reservoir. . For this reason, the storage place and the transport vehicle are not soiled.
[0031]
Comparative Example 1
In the assembly container of this example, as shown in FIGS. 13 to 16, a bottom plate 91 and a side plate 92 are connected via a hinge portion 93 having an M-shaped cross section.
When the assembly container 9 of this example is molded, as shown in FIGS. 16 and 17, a mold 980 having two molding cavities 98 is used. The cavity 98 includes a bottom plate forming surface 981 for forming the bottom plate 91, a side plate forming surface 982 for forming the side plate 92 in the same direction as the plane direction of the bottom plate 91, and a hinge provided therebetween. Part molding surface 983.
[0032]
If the size of the bottom plate 1 and the side plate 2 to be molded is the same as that of the first embodiment, when the assembly container is molded in the unfolded state as in this example, up to two molds of the same size are used. The cavity 98 cannot be placed.
From this, when this comparative example 1 is compared with the first embodiment, the assembly container of the first embodiment can have six cavities. Therefore, when this comparative example is compared with the first embodiment, it can be seen that in the first embodiment, a large number of assembly containers can be integrally formed in a small space, and the production efficiency is high.
[0033]
In this comparative example, it is assumed that the same mold clamping pressure as that in the first embodiment is applied per unit area. In this case, since this comparative example has a larger projected area than the first embodiment, the clamping force applied to one cavity is larger than that in the first embodiment. From this, it can be seen that in the case of the first embodiment, a smaller mold clamping force is sufficient to form one assembly container than in the case of this comparative example.
[0034]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the assembly container with a water reservoir which can be integrally molded easily in a small space with high efficiency and can prevent the outflow of moisture can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of an assembly container according to Embodiment 1;
FIG. 2 is a cross-sectional view taken along the line QQ in FIG. 1 to show the assembly container of the first embodiment.
FIG. 3 is a cross-sectional view of the hinge structure of the assembly container in the first embodiment.
4 is a partial plan view of a side plate for showing a contact state between the side plates in Embodiment 1. FIG.
FIG. 5 is a development view of a molding die in the first embodiment.
6A is a cross-sectional view of a molding die in Embodiment 1 and FIG. 6B is a partially enlarged view for explaining a shift piece molding surface;
FIG. 7 is a cross-sectional view of a mold according to Embodiment 1;
FIG. 8 is a cross-sectional view of a mold in a state where an upper mold and a lower mold are opened in Embodiment 1;
9 is a cross-sectional view of a mold clamped in Embodiment 1. FIG.
10 is an explanatory view showing a method of assembling and deploying an assembly container in Embodiment 1. FIG.
FIG. 11 is an explanatory diagram of a method for using the assembly container in the first embodiment.
FIG. 12 is an explanatory view showing a form during transportation and storage of the assembly container in the first embodiment.
13 is a partially cutaway perspective view of an assembled container in an assembled state in Comparative Example 1. FIG.
14 is a perspective view of an assembled container in a developed state in Comparative Example 1. FIG.
15 is a cross-sectional view of a hinge portion of a conventional example in Comparative Example 1. FIG.
16 is a development view of a molding die in Comparative Example 1. FIG.
17 is a cross-sectional view of a molding die in Comparative Example 1. FIG.
FIG. 18 is a cross-sectional view of a mold in which a side plate molding surface is erected with respect to a bottom plate molding surface in a conventional example.
[Explanation of symbols]
1. . . Bottom plate,
10. . . Water reservoir recess,
11. . . Inner peripheral edge,
2. . . Side plate,
21. . . Inner bottom edge,
25. . . side,
251. . . Mating protrusion,
252. . . Fitting recess,
3. . . Side shifting pieces,
31. . . Bottom plate contact surface,
32. . . Side plate contact surface,
41, 42. . . Thin-walled connection,
5). . . Assembly container with water reservoir,
7). . . Mold,
71. . . Upper mold,
72. . . Lower mold,
73. . . cavity,
74. . . Molding surface,
77. . . Pre-expanded particles,
741. . . Bottom plate molding surface,
742. . . Side plate molding surface,
743. . . Shifted piece forming surface,
744,745. . . Connecting surface molding surface,

Claims (2)

In an assembly container formed by connecting a rectangular bottom plate and side plates to each side of the bottom plate by a hinge structure and integrally molded with a synthetic resin,
Between the bottom plate and the side plates, now each side plate is provided a lateral shift piece for shifting each side in the four sides of the bottom plate,
The laterally displaced pieces are connected to the peripheral edge of the bottom plate and the lower end of the side plate by thin connection portions, respectively.
The bottom plate is provided with a water reservoir recess ,
Further, the side shifting piece has a bottom plate contact surface that contacts the bottom plate during assembly, and a side plate contact surface that contacts the side plate during assembly, and the bottom plate contact surface is an inner side of the thin-walled connecting portion. In addition, the side plate contact surface is provided outside the thin-walled connecting portion,
Further, the side plate has a 45-degree inclined surface on which the side plates are brought into contact with each other when the side plate is erected on the four sides of the bottom plate via the side-shifting pieces and assembled. An assembly container with a water reservoir, wherein the inclined surface is provided with a fitting convex portion and a fitting concave portion so that the side plates are fitted and fixed to each other . 2. An assembly container with a water reservoir according to claim 1, wherein the inner surface of the side wall of the water reservoir recess forms the same surface as the inner surface of the side plate during assembly.

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