JP2006111297A - Plastic-made packaging container and plastic sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container without the need of using an adhesive in assembly, easy to assemble manually and reducing an assembly cost. <P>SOLUTION: A pair of opposite side plates 14 and 15 are formed of two coupling pieces 14a, 14b, 15a and 15b having lengths overlapping with each other to be coupled by engaging cuts formed on their ends. Therefore, the respective side plates 12, 13, 14 and 15 can be raised without using the adhesive by engaging the coupling pieces 14a, 14b, 15a and 15b, so as to form an article storage space. Thus, a manufacturing cost (assembly cost) of the packaging container can be reduced. An external cover 16a for covering the external surface of one of side plate 14 of the pair of the side plates 14 and 15 is used as a lid 16. A reinforcing side plate 17 to overlap with the other side plate 15 is provided, thereby improving buckling strength. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plastic packaging container and a plastic sheet, and more particularly to a plastic packaging container and a plastic sheet that can be assembled without using an adhesive.

Patent Document 1 includes a stored article fixing flap in which a bottom plate portion, a side plate portion, and a lid portion are connected via a bent ruled line and a hole for fixing a stored item is formed inside the lid portion. A plastic packaging container is disclosed. Patent Document 2 has a structure in which, among the four side plate portions, a large side plate portion (back plate portion) is formed from two overlapping sheet portions, and the stored items are fixed by the inner sheet portions. A plastic packaging container is disclosed.
JP 2001-139019 A Japanese Patent Laid-Open No. 2004-256118

  Patent Document 1 discloses that a plastic sheet is bent, a part of a side plate portion is overlapped and sealed with an adhesive to form a box shape, and then a stored item fixing flap is placed inside after storing the stored item. The stored item is fixed by being folded into a lid and closed. In other words, the assembly operation of the packaging container (the folding operation of the plastic sheet) is complicated, and the accommodation operation of the stored items must be performed in the middle of the assembly process of the packaging container, and is dedicated with an automatic adhesive sealing function. It is necessary to work with an automatic packaging machine. Therefore, the shape and type of the punched plastic sheet, which is a material for assembling the packaging container and the packaging container, or the type of stored items are limited.

  The one described in Patent Document 2 is intended to facilitate the assembly operation of the packaging container, and can be assembled manually, and one side of the side plate portion has a double structure. Even if the stored item fixing flap as in 1 is not provided, the stored item can be protected. However, the packaging container disclosed in Patent Document 2 must eventually be overlapped with a part of the side plate portion and sealed with an adhesive. Therefore, even if it is said that a dedicated automatic packaging machine is unnecessary, there is a problem that it takes too much assembly time to assemble and seal the product at the store where the product is sold and to store and provide the product inside.

  In addition, the ones described in Patent Document 1 and Patent Document 2 both use an adhesive in order to reliably maintain the shape retention when three-dimensionalized from the elasticity (restorability) of the plastic sheet, That's expensive. In addition, the height of the side plate part (vertical length) is longer than the horizontal and depth directions of the plastic packaging containers described above, but most of the conventional plastic packaging containers are long in the height direction. There is no provision of a plastic sheet assembled in a so-called flat box shape.

  The present invention has been made in view of the above, and it is not necessary to use an adhesive when assembling. It can be easily assembled manually, can reduce the assembly cost, and can be assembled manually. It is an object of the present invention to provide a plastic packaging container having a high bending strength and having various shapes such as a flat box shape and a plastic sheet for the packaging container.

In order to solve the above-mentioned problems, in the present invention according to claim 1, a plastic sheet on which a folded ruled line is formed is assembled by bending from the folded ruled line, and has a bottom plate part and a side plate part, and is surrounded by the side plate part. A plastic packaging container provided with a lid that covers the upper surface opening,
Each pair of side plates facing each other has a length in which each edge overlaps each other when folded inward from the folding ruled line at the boundary with each adjacent side plate, and the notches formed in each edge are formed. Formed from two connecting pieces that are engaged and connected,
Bending each side plate part from a folding ruled line formed at each boundary and engaging the connecting pieces of the pair of side plate parts to each other without using an adhesive. A plastic container is provided.
According to the second aspect of the present invention, the plastic sheet on which the folding ruled line is formed is assembled from the folding ruled line, and has a bottom plate part and a side plate part, and covers the upper surface opening formed surrounded by the side plate part. A plastic packaging container provided with a lid,
Each pair of side plates facing each other has a length in which each edge overlaps each other when folded inward from the folding ruled line at the boundary with each adjacent side plate, and the notches formed in each edge are formed. Formed from two connecting pieces that are engaged and connected,
The lid portion is bent from an outer surface covering portion covering an outer surface of one side plate portion of the pair of side plate portions formed from two connecting pieces, and a folding ruled line between the outer surface covering portions, and the upper surface An opening covering portion that covers the opening portion, and a flap that is bent along the other side plate portion of the pair of side plate portions formed from two connecting pieces,
The lid of the lid is engaged with the reinforcing side plate that overlaps the other side plate of the pair of side plates by being connected to the bottom plate via a bent ruled line and being bent from the bent ruled line. A plastic packaging container characterized by being assembled is provided.
In this invention of Claim 3, while the flap of the said cover part is bend | folded along the other side plate part outer surface of the said pair of side plate parts, the said reinforcement side plate part is along this other side plate part outer surface. The plastic packaging container according to claim 2, wherein the plastic packaging container is bent and engaged with each other.
The present invention according to claim 4 provides the plastic packaging container according to any one of claims 1 to 3, wherein the plastic packaging container has a box shape including four side plate portions.
In this invention of Claim 5, the height of the said side-plate part is a flat box shorter than the length of at least one of the horizontal direction and the depth direction, The any one of Claims 1-4 characterized by the above-mentioned. A plastic packaging container according to 1 is provided.
In this invention of Claim 6, the plastic sheet stamped to the predetermined shape for assembling the plastic packaging container of any one of Claims 1-5 is provided.
In the present invention of claim 7, a bottom plate portion, a side plate portion and a lid portion connected to each other around the bottom plate portion via a bent ruled line,
One pair of side plate portions formed adjacent to one opposite side of the bottom plate portion; and
A connecting piece that is connected to each side plate portion of the one pair so as to extend in a direction orthogonal to the facing direction of each side plate portion of the one pair, and forms the other pair of side plate portions,
A lid portion connected to one of the opposite opposite sides of the bottom plate portion, and formed in the order of the outer surface covering portion, the opening covering portion and the flap via a bending ruled line,
The plastic sheet according to claim 6, further comprising a reinforcing side plate connected to the other of the opposite opposite sides of the bottom plate.
In this invention of Claim 8, the length of the said connection piece is the same, The plastic sheet of Claim 7 characterized by the above-mentioned is provided.

  The plastic packaging container and the plastic sheet according to the present invention are formed from two connecting pieces that have a pair of opposing side plate portions that overlap each other and are connected by engaging notches formed at each edge. Is done. Therefore, if the connecting pieces are engaged with each other, the side plate portions can be raised without using an adhesive to form an article accommodation space. Thereby, the manufacturing cost (assembly cost) of a packaging container can be reduced. Further, as the lid portion, one having an outer surface covering portion that covers the outer surface of one side plate portion of the pair of side plate portions and a flap that is bent along the other side plate portion is used, and a folding ruled line is formed on the bottom plate portion. Are connected to each other and bent from the folding ruled line to provide a reinforcing side plate that overlaps with the other side plate, and a structure that can be assembled by engaging the flap of the lid and the reinforcing side plate, One of the side plate portions formed by engaging the connecting pieces has a double structure with the outer surface covering portion of the lid portion, and the other has a double structure with the reinforcing side plate portion. Moreover, in the part where the edge of the connection piece overlapped, it becomes a triple structure partially. For this reason, high buckling strength is obtained by the part which becomes a double structure and a triple structure, it becomes difficult to be distorted even if it is a flat box shape, and the freedom degree of a box shape increases.

  Next, the present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a perspective view showing a plastic packaging container 10 according to the present embodiment, and FIG. 2 is a diagram showing an unfolded state (the state of the plastic sheet 20) before assembling the plastic packaging container 10. FIG. 3 is a diagram illustrating a process of assembling the plastic packaging container 10.

  As shown in these drawings, the plastic packaging container 10 of the present embodiment includes a bottom plate portion 11, four side plate portions 12 to 15, and a lid portion 16. The plastic sheet 20 to be the plastic packaging container 10 is formed by punching a sheet material made of A-PET (amorphous polyethylene terephthalate), PP (polypropylene) or the like into a predetermined shape by a punching machine. The thickness of the plastic sheet 20 is not limited, but is selected in the range of about 0.1 to 1 mm, preferably about 0.2 to 0.5 mm. Moreover, although what was colored may be given, in order to make confirmation of a contained thing easy, it is preferable to set it as a transparent or translucent thing.

  As shown in FIG. 2, the punched plastic sheet 20 has one pair facing each other when folded into a three-dimensional shape on the left and right of FIG. 2 along the longitudinal direction of the bottom plate portion 11 formed in a rectangular shape. Side plate portions 12 and 13 (hereinafter referred to as “first side plate portion 12” and “second side plate portion 13”), and adjacent to the upper and lower sides of each of the side plate portions 12 and 13, respectively, The first connecting pieces 14a, 15a and the second pair of side plate portions 14, 15 (hereinafter referred to as "third side plate portion 14", "fourth side plate portion 15") that face each other when they are Connecting pieces 14b and 15b are formed.

  The first connecting piece 14a and the second connecting piece 14b that constitute the third side plate portion 14, and the first connecting piece 15a and the second connecting piece 15b that constitute the fourth side plate portion 15, respectively, When the first side plate portion 12 and the second side plate portion 13 are raised and folded inward, the end edges have a length that overlaps with each other by a predetermined length. The overlapping edges are formed with cuts 14c, 14d, 15c and 15d, one cut from the upper end and the other cut from the lower end, respectively, and the first connecting piece 14a and the second connecting piece 14b. The third side plate portion 14 is formed by engaging the notches 14c and 14d, and the notches 15c and 15d of the first connecting piece 15a and the second connecting piece 15b are engaged with each other. 4 side plate portions 15 are formed. In addition, inner folding pieces 12a and 13a are provided adjacent to the first side plate portion 12 and the second side plate portion 13, respectively, and the first side plate portion 12 and the second side plate portion 13 are raised. In this state, the inner folded pieces 12a and 13a are bent inward to achieve a function of reducing a gap between the upper side opening portion and the cover portion 16 formed by being surrounded by the four side plate portions 12 to 15.

  Moreover, it is preferable that each connection piece 14a, 14b, 15a, 15b of the above-mentioned 3rd side plate part 14 and the 4th side plate part 15 is the same length. When punching into the shape of the plastic sheet 20 as shown in FIG. 2, a sheet material having a size capable of obtaining a plurality of the plastic sheets 20 is prepared, and each of the connecting pieces 14a, 14b, 15a, 15b is prepared. By using the same length, waste of material is reduced because of the symmetrical shape.

  The lid portion is located on the upper side of FIG. 2 along the direction orthogonal to the longitudinal direction of the bottom plate portion 11 and sandwiched between the first connecting piece 14a and the second connecting piece 14b of the third side plate portion 14. 16 is connected to the lower side of FIG. 2 and is sandwiched between the first connection piece 15a of the fourth side plate portion 15 and the second connection piece 15b of the fourth side plate portion 15. The reinforcing side plate portions 17 are connected to each other.

  2, the lid portion 16 includes an outer surface covering portion 16a, an opening covering portion 16b, and a flap 16c in order from the portion adjacent to the bottom plate portion 11, and the outer surface covering portion 16a has the height of the third side plate portion 14. The opening covering portion 16b has substantially the same size as the bottom plate portion 11, and the flap 16c has a length substantially the same as or slightly shorter than the height of the fourth side plate portion 15. Has been. Further, the reinforcing side plate portion 17 is formed in a size having substantially the same height as the fourth side plate portion 15, and an engagement hole 17a is formed at a substantially central portion thereof, and the engagement hole 17a. An engagement piece 16d that engages with the flap 16c is provided by forming a substantially semicircular cut at a position corresponding to the engagement hole 17a in the flap 16c.

  Here, the boundary between the bottom plate portion 11 and the first side plate portion 12, the boundary between the bottom plate portion 11 and the second side plate portion 13, the boundary between the bottom plate portion 11 and the lid portion 16, the bottom plate portion 11 and the reinforcing side plate portion 17. , The boundary between the first side plate 12 and the first connecting piece 14a of the third side plate 14, and the first connecting piece 15a of the first side plate 12 and the fourth side plate 15 A boundary, a boundary between the second side plate portion 13 and the second connecting piece 14b of the third side plate portion 14, a boundary between the second side plate portion 13 and the second connecting piece 15b of the fourth side plate portion 15, A boundary between the first side plate portion 12 and the inner folded piece 12a, a boundary between the second side plate portion 13 and the inner folded piece 13a, a boundary between the outer surface covering portion 16a of the lid portion 16 and the opening covering portion 16b, and a lid; Folding ruled lines 30 are formed at the boundary between the opening covering portion 16b and the flap 16c of the portion 16 so as to be bendable. That. The bent ruled line 30 is engraved using a ruled line blade formed in a predetermined blade shape.

  The folding ruled line 30 can be formed by various conventionally known means. For example, the bent ruled line 30 can be formed by continuously forming irregularities along the above boundaries, or can be formed by intermittent holes, or disclosed in JP-A-2001-62909. As disclosed, a set of a curved blade and two adjacent curved concave surfaces as a set, and a set of curved concave surfaces are formed at predetermined intervals in the direction of the blade edge of the vertical blade, and each set of adjacent curved concave surfaces. What formed using the ruled line blade which formed the horizontal blade orthogonal to a vertical blade between curved concave surfaces can be used. By forming with the ruled line blade disclosed in Japanese Patent Application Laid-Open No. 2001-62909, there is an advantage that it is easy to bend but is not easily damaged, and light scattering is reduced to make it less noticeable in appearance. In particular, it is more preferable that the bent ruled line 30 is formed by the ruled line blade disclosed in Japanese Patent No. 3532183. What is disclosed in Japanese Patent No. 3532183 is not provided with a horizontal blade in a direction perpendicular to the vertical blade as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2001-62909, but at an arbitrary angle with respect to the vertical blade. The slanting blade inclined at is formed between two adjacent curved concave surfaces. When the technique disclosed in Japanese Patent No. 3532183 is used, it is possible to further improve the balance of ease of bending, elasticity, and resistance to breakage, and to improve the feeling of touch.

  Next, based on FIG. 3, the assembly process of the plastic packaging container 10 of this embodiment is demonstrated. First, as shown in FIG. 3 (a), the first side plate portion 12 and the second side plate portion 13 are bent from a folding ruled line formed at the boundary with the bottom plate portion 11 to stand. Next, as shown in FIGS. 3A and 3B, the first connecting piece 14 a of the third side plate portion 14 and the fourth side plate portion 15 of the fourth side plate portion 15 from each boundary with the first side plate portion 12. The first connecting piece 15a is bent inward, and the second connecting piece 14b of the third side plate portion 14 and the second connecting piece 15b of the fourth side plate portion 15 are separated from each boundary with the second side plate portion 13. Bend inward. Then, as shown in FIGS. 3B and 3C, the third side plate portion 14 is formed by engaging the notches 14c and 14d of the first connecting piece 14a and the second connecting piece 14b. The fourth side plate 15 is formed by engaging the first connecting piece 15a and the second connecting piece 15b. In this state, the contents are put through the upper surface opening formed surrounded by the four side plate portions 12 to 14.

  Next, as shown in FIG. 3 (d), the inner folding pieces 12a and 13a of the first and second side plate portions 12 and 13 are folded inward, and the outer surface covering portion 16a of the lid portion 16 is raised to raise the first. The outer side surface of the third side plate portion 14 is covered, and the opening covering portion 16b is bent from the boundary with the outer surface covering portion 16a to cover the upper surface opening portion. Next, as shown in FIG. 3 (e), the flap 16 c is bent from the boundary with the opening covering portion 16 b, the reinforcing side plate portion 17 is bent up and the reinforcing side plate portion 17 is raised to the outer surface of the fourth side plate portion 15. Further, the flap 16c is made to run along the outer surface of the reinforcing side plate portion 17. Finally, the engagement piece 16 d of the flap 16 c is engaged with the engagement hole 17 a of the reinforcing side plate portion 17. Thereby, the plastic packaging container 10 as shown in FIG. 1 can be assembled without bonding.

  According to this embodiment, if the first and second connecting pieces 14a, 14b, 15a, 15b forming the third side plate portion 14 and the fourth side plate portion 15 are engaged, the three-dimensional structure is obtained. Since the article storage space surrounded by the parts 12 to 15 is formed, it is not necessary to perform the back bonding as in the conventional plastic packaging container, and the manufacturing cost can be reduced. Further, the outer side covering portion 16 a of the lid portion 16 overlaps with the third side plate portion 13, and the reinforcing side plate portion 17 overlaps with the outer surface of the fourth side plate portion 14. Therefore, the buckling strength is high, and deformation such as distortion and crushing when an external force is applied from the direction of the opening covering portion 16b of the lid portion 16 can be suppressed. In addition, the bottom plate portion 11 is formed in a flat plate shape, and the side plate portions 12 to 15 and the lid portion 16 are connected to the periphery thereof so that it can be assembled by hand without using an adhesive. The plastic packaging container 10 having various shapes can be provided, such as a flat box shape in which the heights of the portions 12 to 15 are shorter than at least one of the horizontal direction and the depth direction. Further, in the case of using an adhesive like the one disclosed in Patent Document 2, the side plate portions overlap each other even in a state before assembly, and when a plurality of sheets are stacked, stored, transported, etc. However, according to the present embodiment, the sheet can be stored and transported in a single sheet state as shown in FIG.

  In the present invention, if the first and second connecting pieces 14a, 14b, 15a, 15b forming the third side plate portion 14 and the fourth side plate portion 15 are engaged, a three-dimensional structure can be obtained. Since it can be shaped, it is suitable as a take-out packaging container for donuts, cakes, and the like, which is conventionally made of plastic but only uses paper packaging containers.

FIG. 1 is an external perspective view of a plastic packaging container according to an embodiment of the present invention. FIG. 2 is a plan view showing a plastic sheet punched into a predetermined shape used for assembling the plastic packaging container according to the embodiment. FIG. 3 is a diagram for explaining an assembly process in which the plastic sheet is assembled into a plastic packaging container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Plastic packaging container 11 Bottom plate part 12 1st side plate part 13 2nd side plate part 14 3rd side plate part 14a 1st connection piece of 3rd side plate part 14b 2nd connection piece of 3rd side plate part DESCRIPTION OF SYMBOLS 15 4th side plate part 15a 1st connection piece of 4th side plate part 15b 2nd connection piece of 3rd side plate part 16 Cover part 16a Outer surface coating | coated part 16b Opening coating part 16c Flap 17 Reinforcement side plate part 20 Plastic sheet 30 Bending ruled line

Claims (8)

A plastic packaging which is assembled by folding a plastic sheet formed with a folding ruled line from the folding ruled line, and has a bottom plate part and a side plate part, and a lid part covering an upper surface opening formed surrounded by the side plate part. A container,
Each pair of side plates facing each other has a length in which each edge overlaps each other when folded inward from the folding ruled line at the boundary with each adjacent side plate, and the notches formed in each edge are formed. Formed from two connecting pieces that are engaged and connected,
Bending each side plate part from a folding ruled line formed at each boundary and engaging the connecting pieces of the pair of side plate parts to each other without using an adhesive. Characteristic plastic container. A plastic packaging which is assembled by folding a plastic sheet formed with a folding ruled line from the folding ruled line, and has a bottom plate part and a side plate part, and a lid part covering an upper surface opening formed surrounded by the side plate part. A container,
Each pair of side plates facing each other has a length in which each edge overlaps each other when folded inward from the folding ruled line at the boundary with each adjacent side plate, and the notches formed in each edge are formed. Formed from two connecting pieces that are engaged and connected,
The lid portion is bent from an outer surface covering portion covering an outer surface of one side plate portion of the pair of side plate portions formed from two connecting pieces, and a folding ruled line between the outer surface covering portions, and the upper surface An opening covering portion that covers the opening portion, and a flap that is bent along the other side plate portion of the pair of side plate portions formed from two connecting pieces,
The lid of the lid is engaged with the reinforcing side plate that overlaps the other side plate of the pair of side plates by being connected to the bottom plate via a bent ruled line and being bent from the bent ruled line. A plastic packaging container characterized by being assembled.   The flap of the lid portion is bent along the outer surface of the other side plate portion of the pair of side plate portions, and the reinforcing side plate portion is bent along the outer surface of the other side plate portion, and both are engaged. The plastic packaging container according to claim 2.   The plastic packaging container according to any one of claims 1 to 3, wherein the plastic packaging container has a box shape including four side plate portions.   The plastic packaging container according to any one of claims 1 to 4, wherein the height of the side plate portion is a flat box shorter than at least one of the longer side in the lateral direction and the depth direction.   A plastic sheet punched into a predetermined shape for assembling the plastic packaging container according to any one of claims 1 to 5. A bottom plate portion, a side plate portion and a lid portion connected to each other around the bottom plate portion via a folding ruled line,
One pair of side plate portions formed adjacent to one opposite side of the bottom plate portion; and
A connecting piece that is connected to each side plate portion of the one pair so as to extend in a direction orthogonal to the facing direction of each side plate portion of the one pair, and forms the other pair of side plate portions,
A lid portion connected to one of the opposite opposite sides of the bottom plate portion, and formed in the order of the outer surface covering portion, the opening covering portion and the flap via a bending ruled line,
The plastic sheet according to claim 6, further comprising: a reinforcing side plate connected to the other opposite side of the bottom plate.   The plastic sheet according to claim 7, wherein the connecting pieces have the same length.

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