JP2007112444A - Container which can be developed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container which is an assembly type, easily manufactured into an arbitrary dimension, inexpensive, sufficient in strength and durability, lightweight, flattened not in use to highly reduced in volume, and developed. <P>SOLUTION: The container is formed of a plastic foam board. Two side walls (2) are connected to both sides across a bottom face (1), and a cruciform material with two end walls (3) being connected to upper and lower sides thereof is prepared. Boundary lines (4) between the bottom face and the two side walls and boundary lines (5) between the bottom face and the two end walls are hinge-worked in a bendable manner. Parallel edge portions (21 and 31) of the two side walls and the two end walls and upper edge portions (22 and 32) are covered by a plastic-made decorative material (6) of a U-shaped section. Corner connecting tools (7 and 8) for attaching/detaching the side walls and the end walls to/from each other are mounted thereon. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a container that is made of plastic and can be developed, that is, can be flat when not used as a container.

Containers used for transporting and storing various articles have been proposed to have various structures using various materials such as metal and plastic. In particular, a box-shaped container with an open top is frequently used, but it is bulky and inconvenient when not in use. Therefore, a container that is folded and reduced in volume and can be transported is preferred.

For this reason, for example, a “joint box corner connector” has been proposed as a means for forming a box with a plate material when necessary and unfolding to reduce the volume when not in use. (Patent Document 1). This connector forms a box, “a side plate is rotatably connected to each edge of the bottom plate, and a female connector and a male connector that can be engaged with and disengaged from each other on top of adjacent side edges of each side plate. The box is formed by engaging the male and female couplers, and the box is expanded by being separated. In addition to this example, several corner couplers having similar functions have been developed.
Reality 8-8989

However, there is no specific teaching in Patent Document 1 as to how to form the box itself, and as described above, “the side plate is pivotally connected to each edge of the bottom plate”. At rest. If a base plate, side walls, and end walls are made of plastic and a hinge is used as a means for connecting them in a rotatable manner, it takes a lot of time to connect them and is impractical. If pinned at both ends, high stress is applied locally, and there is a risk of destruction. If parts are prepared by injection molding or the like, the cost is high, including the production of molds, which is not practical.

A lightweight, high-strength material, called “corrugated plastic”, that is, plastic corrugated cardboard, has a cross-sectional structure in which a large number of ribs running in parallel are connected between two parallel plates. It is used depending on the scene because of its high strength, but the strength anisotropy is large and the rib is weak in the direction perpendicular to the direction. This is not an advantageous embodiment.

The object of the present invention is to solve the above-mentioned problems in a prefabricated container, to easily manufacture a container of any size, low cost, sufficient strength and durability, light weight, and low An object of the present invention is to provide an expandable container that can be flattened when deployed and can be highly reduced in volume.

The deployable container of the present invention is an open container as shown in FIG. 1 and an exploded view, and is formed by molding a melt-extruded plastic sheet into a number of caps. First, the bottom surface as shown in FIG. 2 is made from a plastic foam board in which a flat back sheet is bonded to the bottom surface of the cap sheet provided with a protrusion, and another liner sheet is bonded to the top of the cap. Prepare a cross-shaped material in which two side walls (2) are connected to both sides of (1), and two end walls (3) are connected to the upper and lower sides. The boundary line (4) between the two side walls and the boundary line (5) between the bottom surface and the two end walls are formed to be bendable by hinge processing, and the parallel edge portions (21) and the upper side of the two side walls The edge (22) as well as the two end walls The row edge portion (31) and the upper edge portion (32) are covered with a plastic decorative material (6) having a U-shaped cross section, and the upper portion of the parallel edge portion of the two side walls and the parallel edge portion of the two end walls. 3 is a deployable container having a structure as shown in FIG. 3 with a corner connector (7, 8) attached to the upper part of the container.

Since the deployable container of the present invention uses a plastic bubble board as a material for a plate forming a box, the bottom plate, both side walls and both end walls are integrally formed, and the bottom plate and both side walls, and the bottom plate and both end walls are formed. Can be realized by hinge processing. Unlike the corrugated plastic, the plastic bubble board has almost no anisotropy of strength, so even if the five surfaces forming the box are integrally formed, there is no possibility of producing a weak point in strength. The hinged connecting portion has sufficient strength, and stress is not concentrated locally.

Since this container is configured as described above, the manufacturing cost is low. Since various things are marketed as a male and female coupling tool, what is necessary is just to employ | adopt an appropriate thing from them. In general, it is difficult to achieve both easy engagement and separation and strong coupling, but the frequency of repeating assembly and disassembly according to the intended use of the container to be manufactured, that is, depending on the size and weight of the articles to be accommodated. It may be selected depending on the degree.

It is also an advantage of the container of the invention that the size and strength (and hence the weight of the container) can be selected over a wide range according to the container application. Many plastic folding containers and the like are prepared by injection molding almost all of the constituent parts, and it is not easy to prepare many expensive molds. In particular, it is difficult to provide large containers. On the other hand, the container of the present invention can be manufactured in a large size as long as the size of the plastic bubble board used as a raw material permits, and almost custom production is possible.

Various types of plastic foam boards are commercially available. Then, a cross-shaped material in which five portions are integrated (which is sometimes called a “Yakko type” because it is a flat shape of a Yako cocoon) is cut out or punched out, and the above-mentioned connecting portion is obtained by pressing a hot blade. A cosmetic material with a U-shaped cross section, which is a plastic extrusion, and a male / female connector as described above, is attached to this material, and the necessary locations are fixed by means such as riveting. The container is completed. It is recommended that the corner connector be provided with protrusions to maintain stacking.

Polypropylene is suitable as the plastic for the plastic foam board. The material of the decorative material and the corner connector is optional, but if they are also made of polypropylene, recycling becomes easy.

Using a bubble board “Purapearl” (registered trademark) made of polypropylene having the following specifications as a material, a container having an outer dimension of 60 cm long × 40 cm wide × 40 cm high was manufactured.
Grade: P5PP3-100
Thickness: 5mm
Basis weight: 1000 g / m ²
Flexural rigidity: Flow direction 3.6 MPa
Width direction 3.3MPa
As the decorative material for covering the edge of the plate, an extruded product made of polypropylene having a width of 36 mm and a thickness of 9 mm and having a groove matching the material was used. As the corner coupler, four sets of “Hirakon BOX Corner” (manufactured by Aono Co., Ltd.) obtained on the market were used, and fixed to the side wall and the end wall with rivets to complete the container.

The perspective view which shows the place which assembled the expandable container of this invention. The material of the container of FIG. 1 cut out from the plastic bubble board. FIG. 3 is a development view of a container according to the present invention in which a decorative material and a corner connector are attached to the container material of FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom face 2 Side wall 21 Parallel edge part of side wall 22 Upper edge part 3 of side wall End wall 31 Parallel edge part of end wall 32 Upper edge part 4 of end wall 5 Boundary line between bottom face and side wall 5 Boundary line between bottom face and end wall 6 Cosmetics 7, 8 Corner connector

Claims (3)

A container with an open top, a melt-extruded plastic sheet is molded, and a flat back sheet is bonded to the bottom of the cap sheet provided with a number of cap-shaped protrusions. Using a plastic foam board with a liner sheet as a material, a cross shape with two side walls (2) connected to both sides of the bottom (1) at the center and two end walls (3) connected to the top and bottom The boundary line (4) between the bottom surface and the two side walls and the boundary line (5) between the bottom surface and the two end walls are formed to be bendable by hinge processing, and the two side walls The parallel edge portion (21) and the upper edge portion (22) of the two and the parallel edge portion (31) and the upper edge portion (32) of the two end walls are covered with a plastic decorative material (6) having a U-shaped cross section. Parallel edges of two side walls The top and the upper parallel edges of the two end walls, deployable container they become attached to the corner connector (7, 8) that enables or separated or coupled to one another. The container according to claim 1, wherein polypropylene is used as the plastic for the plastic foam board. The container of claim 1, wherein the corner coupler has a protrusion for maintaining stacking.

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