JP2001072173A - Article feed container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive article feed container excellent in lightweight properties and rigidity, reduced in strain, having high accuracy and not becoming narrow in its article housing space at the time of stacking. SOLUTION: An article feed container 10 made of a plastic material has a housing recess 21 which is surrounded by a peripheral wall part 11 and partitioned into a plurality of article housing spaces 25 by the ribs 23 formed to the bottom surface of the recess and comprises a laminated article of two plastic sheets comprising upper and lower sheets A, B shaped by vacuum molding and reinforcing spaces 13, 24 are formed between the upper and lower sheets A, B at the parts of the peripheral wall part 11 and the ribs 23 and the edges of the upper and lower sheets A, B are overlapped at the peripheral wall part 11 to form the outer peripheral flange part 12 protruding outwardly from the side part of the peripheral wall part 11 and the upper and lower sheets A, B are mutually bonded along the outer peripheral flange part 12 and the bottom surfaces 7 of the article housing spaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article transport container, and more particularly to an article transport container suitable for transporting electronic components such as integrated circuits, storage circuits, switches, and the like.

[0002]

2. Description of the Related Art When electronic components such as integrated circuits, storage circuits, and switches are transported from a component manufacturing plant to a product assembling plant, or to each assembling process in the product assembling plant, a plastic article is transported. It is often stored in containers and transported.

[0003] As a conventional article transport container, there is a plastic container made of an injection molded article or a foam molded article having an article storage recess having an open upper surface. The article storage recess is partitioned into a plurality of article storage spaces by a partition, and a plurality of articles can be stored in one container.

[0004] Incidentally, since the article transport containers are often stacked and transported, high rigidity is required. In addition, since many article transport containers are transported at once for reasons such as a reduction in transport cost, it is preferable that the article transport containers have excellent lightness. Furthermore, if there is distortion in the article transport container, it is easy to rattle during transportation, and some stored articles may be damaged. Therefore, a container without distortion is required. In addition, if there is a distortion in the container, there is also a problem that the containers cannot be satisfactorily stacked or the rattling becomes large.

However, in order to obtain a highly rigid article transport container from an injection-molded article, the thickness of the container must be increased. As a result, the container becomes heavy, and the article transport container is naturally cooled after molding. In addition, there is a problem that the distortion is easily generated and the accuracy is further reduced, and the product cost is increased. Further, when the article transport container is made of a foamed product, the foamed product has a property of shrinking by natural cooling after molding, and a property of expanding and contracting due to temperature and humidity during use, and high material cost and manufacturing cost. Therefore, there is a problem that the obtained article transport container has low dimensional accuracy and high price.

[0006] Further, in the conventional article transport container,
When stacked, due to the weight of the stored articles and vibration during transport, the upper article transport container is too tightly fitted in the lower article transport container, and the article storage space in the lower article transport container becomes narrow. is there.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is excellent in light weight and rigidity, has less distortion, has high accuracy, and has a small article storage space when stacked. It is intended to provide an inexpensive article transport container.

[0008]

The invention according to claim 1 is
A plastic article transport container having a storage recess surrounded by a peripheral wall portion, wherein the storage recess is partitioned into a plurality of article storage spaces by ribs bent at the bottom surface, and is formed by vacuum forming. It consists of a laminated product of two plastic sheets consisting of an upper sheet and a lower sheet, and a space for reinforcement is formed between the upper sheet and the lower sheet in the peripheral wall portion and the rib portion, and the peripheral wall portion is hollow. In the portion, the edges of the upper sheet and the lower sheet overlap to form an outer peripheral flange portion protruding outward from the side of the peripheral wall portion, and the upper sheet and the lower sheet are bonded at the outer peripheral flange portion and the bottom surface of the article storage space. It is characterized by being.

According to a second aspect of the present invention, the ribs of the lower sheet are formed lower than the ribs of the upper sheet so as to leave a space above the ribs of the upper sheet. The ribs are fitted in the ribs and the side surfaces of both ribs overlap. The invention according to claim 3 is characterized in that only the upper sheet has a rib shape in the rib portion, and the lower sheet is flat.

According to a fourth aspect of the present invention, the upper and lower surfaces of the peripheral wall portion are engaged with the other upper and lower article transport containers when the article transport containers are stacked so that the vertical and horizontal positional relationship between the article transport containers is established. It is characterized in that a fixed engaging portion is formed.

According to a fifth aspect of the present invention, the engaging portion on the upper surface of the peripheral wall portion has a stepped shape depressed downward on the upper inner peripheral side of the peripheral wall portion, and the engaging portion on the lower surface of the peripheral wall portion is formed on the peripheral wall portion. The horizontal step portion of the two engaging portions overlaps with the horizontal step portions of the engaging portions of the other upper and lower article transport containers when the article transport containers are stacked, so that the article is transported. The vertical interval between the containers is kept constant.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an article transport container according to an embodiment of the present invention, and FIG.
2 is a cross-sectional view illustrating the state of use of the article transport container of FIG. 1, and FIG. 4 is a cross-sectional view of an article transport container according to another embodiment.

The article transport container 10 shown in FIG. 1 and FIG.
A rib that is suitable for storing and transporting electronic components such as an integrated circuit and that is provided with a storage recessed portion 21 that is surrounded by the peripheral wall portion 11 and that opens upward, and that is bent at the bottom surface of the storage recessed portion 21 The storage recess 21 is partitioned into a plurality of article storage spaces 25 by 23. The article transport container 10 of this embodiment has a substantially rectangular planar shape, and ribs 23 for partitioning the article storage recess 21 are formed in a lattice shape.
A total of twelve article storage spaces 25 each having four rows and four rows are formed.

As shown in FIG. 2, the article transport container 10 is formed by laminating two plastic sheets including an upper sheet A and a lower sheet B. The upper sheet A constitutes the upper surface of the article transport container 10, while the lower sheet B constitutes the article transport container 1.
0 constitutes the lower surface side. The upper sheet A and the lower sheet B are formed into a required shape by vacuum forming, and the peripheral wall portion 11, the article storage recess 21, the rib 23, and the article storage space 25 are formed by bonding.

The material of the upper sheet A and the lower sheet B is a thermoplastic plastic which can be vacuum formed, and is appropriately selected. In particular, a plastic which is excellent in rigidity and lightweight, inexpensive, and excellent in moldability, such as polystyrene, is preferable. In addition, you may mix a desired additive, a coloring agent, etc. in the plastic which comprises the upper sheet A and the lower sheet B. The mixing of the additives and the like is not limited to both the upper sheet A and the lower sheet B, and only one of the sheets can be used, and the degree of freedom in product design is high. Also,
The upper sheet A and the lower sheet B are preferably non-foamed in terms of rigidity. The thicknesses of the upper sheet A and the lower sheet B are increased when the size of the article transport container 10 is large, and reduced when the size of the article transport container 10 is small.
It is selected in a range of about 1.5 mm.

Further, the upper sheet A and the lower sheet B
The materials, colors, thicknesses, etc., may differ from each other depending on the use of the article transport container, the stored articles, and the like. For example, the upper sheet A serving as the inside is made of a material having lower rigidity than the lower sheet B serving as the outer side, the thickness is reduced by reducing the thickness, or the lower sheet B serving as the outer side is made smaller than the upper sheet A serving as the inside. Also, as a material having high rigidity, the rigidity and strength are further increased. Further, by changing the color between the upper sheet A and the lower sheet B or changing the pattern, it is also possible to distinguish the use of the article transport container and the type of the article stored in the article transport container. As described above, since the upper sheet A and the lower sheet B are bonded to each other, the degree of freedom for various required properties, applications, and costs is extremely high.

The peripheral wall portion 11 has a required height, an outer peripheral flange portion 12 projects substantially horizontally from the outer peripheral edge of the side surface, and an outer peripheral flange portion 12A of the upper sheet A and an outer peripheral flange portion 12B of the lower sheet are overlapped. Glued. The bonding may be performed by a method using a known adhesive such as a commercially available plastic adhesive or an organic solvent, an ultrasonic welder, a heat seal, or the like. Further, the peripheral wall portion 11
The portion following the outer peripheral flange portion 12 is a hollow reinforcing space 13. In the reinforcing space 13, the upper sheet A is bent so as to expand upward, and the lower sheet B is bent so as to expand downward. The peripheral wall 1
A reinforcing member made of a foam, a piece of wood, or the like may be partially disposed in the reinforcing space 13.

Further, as shown in FIG. 3, the upper and lower surfaces of the peripheral wall portion 11 engage with the upper and lower other article transport containers 10U and 10L when the article transport containers are stacked, and
An upper surface engaging portion 17A and a lower surface engaging portion 17B are formed to keep the vertical, horizontal positional relationship between U, 10, and 10L constant. Due to the engagement of the engaging portions 17A, 17B, the article transport containers 10U, 10, 10L are collapsed when the article transport containers 10U, 10, 10L are stacked and transported, or the weight of the internal articles P, vibration during transport, and the like are caused. This prevents the upper article transport container 10U from being deeply fitted into the article transport container 10 to reduce the substantial depth of the article storage space 25. In particular, when the article storage space 25 becomes substantially shallow due to the weight or the like, the upper article transport container 10U
The article P in the article transport container 10 may be pushed by the lower surface of the article P, and in the worst case, the article P is damaged.

The upper surface engaging portion 17A in this embodiment is
The upper surface of the peripheral wall portion 11 has a stepped shape (recessed) one step downward on the inner peripheral side of the upper portion.
1 has a stepped shape that is recessed (raised) upward by one step on the outer peripheral side of the lower part of the container 1.
0 and the other article transport containers 10U, 10U
L, which is in contact with and overlaps with the horizontal step portion of the engaging portion, so that the vertical distance between the article transport containers is kept constant.

The rib 23 partitioning the article storage recess 21 is provided between the upper sheet A and the lower sheet A by the reinforcing space 2.
4 are formed to be hollow. In this embodiment, the ribs 23B of the lower sheet B are formed lower than the ribs 23A of the upper sheet A so as to leave a space above the ribs 23A of the upper sheet A. A ribs 23A, 23B
Sides are overlapping. The overlapping portion 26 on the side surfaces of the ribs 23A and 23B may not be bonded with an adhesive or the like. Of course, if bonded, the strength and rigidity of the article transport container 10 will be improved.

In a plurality of article storage spaces 25 partitioned by the ribs 23, the upper sheet A and the lower sheet B are adhered to each other with an adhesive or the like at the bottom surface 27 thereof. The bonding at the bottom surface 27 is more preferably performed over the entire bottom surface 27 of the article storage space 25 from the viewpoint of improving the strength and rigidity of the article transport container 10.

The article transport container 10 having the above-described structure has a double structure of an upper sheet A and a lower sheet B, and is hollow between the upper sheet A and the lower sheet B at the peripheral wall 11 and the ribs 23. Peripheral spaces 1, 24 are formed so as to sandwich the reinforcing spaces 13, 24.
1 outer peripheral flange portion 12 and bottom surface 27 of article storage space 25
Since the upper sheet A and the lower sheet B are bonded and bonded to each other at the portion, the strength and rigidity are high, deformation and distortion hardly occur, and the precision is high.

In the article transport container 10 of the above embodiment, the lower sheet B is also bent upward at the rib 23 to form a rib shape. However, the size of the article transport container 10, the type of stored articles, etc. Depending on the strength and rigidity may not be required as much as the article transport container 10 of the embodiment,
In that case, the lower sheet B may have a flat lower surface without forming ribs as in the article transport container 50 according to another embodiment of the present invention shown in FIG.
Other configurations are the same as those of the article transport container 10 of the above embodiment.

[0024]

As described above, according to the article transport container of the first aspect of the present invention, two plastic sheets consisting of an upper sheet and a lower sheet formed by vacuum forming are laminated and bonded. Having a hollow reinforcing space between the upper sheet and the lower sheet at the peripheral wall portion and the rib portion, and an outer peripheral flange portion of the peripheral wall portion located so as to sandwich the reinforcing space and a bottom surface of the article storage space. Since the upper sheet and the lower sheet are bonded to each other, the strength and rigidity can be increased while maintaining the lightness of the article transport container, and deformation and distortion are less likely to occur and accuracy is high. Further, since the upper sheet and the lower sheet are formed by vacuum molding, shrinkage and deformation after molding are less likely to occur as compared with injection molded products and foam molded products, thereby increasing the accuracy of the article transport container. Therefore, the article transport container according to the first aspect of the present invention is particularly suitable for precision electronic components such as integrated circuits in which vibration during transportation is a problem.

Further, since the article transport container of the first aspect of the present invention is excellent in light weight as described above, the transport cost can be reduced when a large number of articles are transported in a stacked manner.
Further, the article transport container according to the first aspect of the present invention has a lower molding cost and is more economical than forming an article transport container having the same strength and rigidity by using an injection molded product or a foam molded product. In addition, since it consists of laminating the upper sheet and the lower sheet, one of the upper and lower sheets can be made different from the other sheet in material, color, thickness, and filler, etc. The degree of freedom can be increased, and the cost can be reduced.

According to the second aspect of the present invention, the ribs of the lower sheet are formed lower than the ribs of the upper sheet, and the rib side surfaces of the lower sheet overlap the rib side surfaces of the upper sheet. Therefore, the overlap increases the strength and accuracy of the rib portion, and further improves the strength and accuracy of the entire article transport container.

According to the third aspect of the present invention, since no rib is formed on the lower sheet, the stability of the container is increased, and the strength and rigidity are improved. This is effective when less demanding is required.

According to the article transport container of the fourth aspect of the present invention,
An engaging portion is formed on the upper and lower surfaces of the peripheral wall portion so as to engage with other upper and lower article transport containers at the time of stacking the article transport containers and to maintain a constant positional relationship between the article transport containers in the vertical and horizontal directions. When the articles are stacked and transported, the upper article transport container does not collapse, and furthermore, due to the weight of the stored articles and the vibration at the time of transport, the vertical distance between the article transport containers becomes narrower and the depth of the article storage space becomes deeper. It does not become shallow. Therefore, articles can always be stored and transported safely.

Further, according to the article transport container of the present invention, the engaging portions on the upper and lower surfaces of the peripheral wall portion are stepped, and the horizontal step portions at both the engaging portions are vertical when the article transport containers are stacked. Since it overlaps with the horizontal step portion of the engaging portion in the other article transport container, the vertical distance between the article transport containers can be constantly and surely kept constant. Therefore, it is possible to reliably prevent the stored articles in the article storage recesses from being damaged by contacting the lower surface of the upper article transport container, and it is possible to further enhance safety during transport.

[Brief description of the drawings]

FIG. 1 is a perspective view of an article transport container according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a cross-sectional view illustrating a state in which the article transport containers of FIG. 1 are stacked and used.

FIG. 4 is a sectional view of an article transport container according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Article conveyance container 11 Peripheral wall part 12 Outer peripheral flange part 13 Reinforcement space of peripheral wall part 17A Upper surface engaging part 171A Horizontal step part of upper surface engaging part 17B Lower surface engaging part 171B Horizontal step part of lower surface engaging part 21 Article storage recess 23 Rib 24 Reinforcement space for rib part 25 Article storage space 26 Overlap of rib part side surface 27 Bottom of article storage space A Upper sheet B Lower sheet P Article

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[Procedure amendment]

[Submission date] May 9, 2000 (200.5.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Article transport container

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article transport container, and more particularly to an article transport container suitable for transporting electronic components such as integrated circuits, storage circuits, switches, and the like.

[0002]

2. Description of the Related Art When electronic components such as integrated circuits, storage circuits, and switches are transported from a component manufacturing plant to a product assembling plant, or to each assembling process in the product assembling plant, a plastic article is transported. It is often stored in containers and transported.

[0003] As a conventional article transport container, there is a plastic container made of an injection molded article or a foam molded article having an article storage recess having an open upper surface. The article storage recess is partitioned into a plurality of article storage spaces by a partition, and a plurality of articles can be stored in one container.

[0004] Incidentally, since the article transport containers are often stacked and transported, high rigidity is required. In addition, since many article transport containers are transported at once for reasons such as a reduction in transport cost, it is preferable that the article transport containers have excellent lightness. Furthermore, if there is distortion in the article transport container, it is easy to rattle during transportation, and some stored articles may be damaged. Therefore, a container without distortion is required. In addition, if there is a distortion in the container, there is also a problem that the containers cannot be satisfactorily stacked or the rattling becomes large.

However, in order to obtain a highly rigid article transport container from an injection-molded article, the thickness of the container must be increased. As a result, the container becomes heavy, and the article transport container is naturally cooled after molding. In addition, there is a problem that the distortion is easily generated and the accuracy is further reduced, and the product cost is increased. Further, when the article transport container is made of a foamed product, the foamed product has a property of shrinking by natural cooling after molding, and a property of expanding and contracting due to temperature and humidity during use, and high material cost and manufacturing cost. Therefore, there is a problem that the obtained article transport container has low dimensional accuracy and high price.

[0006] Further, in the conventional article transport container,
When stacked, due to the weight of the stored articles and vibration during transport, the upper article transport container is too tightly fitted in the lower article transport container, and the article storage space in the lower article transport container becomes narrow. is there.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is excellent in light weight and rigidity, has less distortion, has high accuracy, and has a small article storage space when stacked. It is intended to provide an inexpensive article transport container.

[0008]

The invention according to claim 1 is
A plastic article transport container having a storage recess surrounded by a peripheral wall portion, wherein the storage recess is partitioned into a plurality of article storage spaces by ribs bent at the bottom surface, and is formed by vacuum forming. It consists of a laminated product of two plastic sheets consisting of an upper sheet and a lower sheet, and a space for reinforcement is formed between the upper sheet and the lower sheet in the peripheral wall portion and the rib portion, and the peripheral wall portion is hollow. In the part, an outer peripheral flange portion is formed in which the edges of the upper sheet and the lower sheet overlap to protrude outward from the side portion of the peripheral wall portion, and the ribs of the lower sheet are formed so as to leave a space above the ribs of the upper sheet. The upper sheet and the lower sheet are fitted in the ribs of the upper sheet, and the side surfaces of the two ribs overlap to form an overlapping portion. Characterized in that it is.

The invention according to claim 2 is characterized in that the upper sheet and the lower sheet are bonded to each other at the overlapping portion on the side surface of the rib of the upper sheet and the rib of the lower sheet. The invention according to claim 3 is characterized in that only the upper sheet has a rib shape in the rib portion, and the lower sheet is flat.

According to a fourth aspect of the present invention, the upper and lower surfaces of the peripheral wall portion are engaged with the other upper and lower article transport containers when the article transport containers are stacked so that the vertical and horizontal positional relationship between the article transport containers is established. It is characterized in that a fixed engaging portion is formed.

The invention according to claim 5 is characterized in that the upper sheet and the lower sheet are bonded to each other over the entire bottom surface of the article storage space.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an article transport container according to an embodiment of the present invention, and FIG.
2 is a cross-sectional view illustrating the state of use of the article transport container of FIG. 1, and FIG. 4 is a cross-sectional view of an article transport container according to another embodiment.

The article transport container 10 shown in FIG. 1 and FIG.
A rib that is suitable for storing and transporting electronic components such as an integrated circuit and that is provided with a storage recessed portion 21 that is surrounded by the peripheral wall portion 11 and that opens upward, and that is bent at the bottom surface of the storage recessed portion 21 The storage recess 21 is partitioned into a plurality of article storage spaces 25 by 23. The article transport container 10 of this embodiment has a substantially rectangular planar shape, and ribs 23 for partitioning the article storage recess 21 are formed in a lattice shape.
A total of twelve article storage spaces 25 each having four rows and four rows are formed.

As shown in FIG. 2, the article transport container 10 is formed by laminating two plastic sheets including an upper sheet A and a lower sheet B. The upper sheet A constitutes the upper surface of the article transport container 10, while the lower sheet B constitutes the article transport container 1.
0 constitutes the lower surface side. The upper sheet A and the lower sheet B are formed into a required shape by vacuum forming, and the peripheral wall portion 11, the article storage recess 21, the rib 23, and the article storage space 25 are formed by bonding.

The material of the upper sheet A and the lower sheet B is a thermoplastic plastic which can be vacuum formed, and is appropriately selected. In particular, a plastic which is excellent in rigidity and lightweight, inexpensive, and excellent in moldability, such as polystyrene, is preferable. In addition, you may mix a desired additive, a coloring agent, etc. in the plastic which comprises the upper sheet A and the lower sheet B. The mixing of the additives and the like is not limited to both the upper sheet A and the lower sheet B, and only one of the sheets can be used, and the degree of freedom in product design is high. Also,
The upper sheet A and the lower sheet B are preferably non-foamed in terms of rigidity. The thicknesses of the upper sheet A and the lower sheet B are increased when the size of the article transport container 10 is large, and reduced when the size of the article transport container 10 is small.
It is selected in a range of about 1.5 mm.

Further, the upper sheet A and the lower sheet B
The materials, colors, thicknesses, etc., may differ from each other depending on the use of the article transport container, the stored articles, and the like. For example, the upper sheet A serving as the inside is made of a material having lower rigidity than the lower sheet B serving as the outer side, the thickness is reduced by reducing the thickness, or the lower sheet B serving as the outer side is made smaller than the upper sheet A serving as the inside. Also, as a material having high rigidity, the rigidity and strength are further increased. Further, by changing the color between the upper sheet A and the lower sheet B or changing the pattern, it is also possible to distinguish the use of the article transport container and the type of the article stored in the article transport container. As described above, since the upper sheet A and the lower sheet B are bonded to each other, the degree of freedom for various required properties, applications, and costs is extremely high.

The peripheral wall portion 11 has a required height, an outer peripheral flange portion 12 projects substantially horizontally from the outer peripheral edge of the side surface, and an outer peripheral flange portion 12A of the upper sheet A and an outer peripheral flange portion 12B of the lower sheet are overlapped. Glued. The bonding may be performed by a method using a known adhesive such as a commercially available plastic adhesive or an organic solvent, an ultrasonic welder, a heat seal, or the like. Further, the peripheral wall portion 11
The portion following the outer peripheral flange portion 12 is a hollow reinforcing space 13. In the reinforcing space 13, the upper sheet A is bent so as to expand upward, and the lower sheet B is bent so as to expand downward. The peripheral wall 1
A reinforcing member made of a foam, a piece of wood, or the like may be partially disposed in the reinforcing space 13.

Further, as shown in FIG. 3, the upper and lower surfaces of the peripheral wall portion 11 engage with the upper and lower other article transport containers 10U and 10L when the article transport containers are stacked, and
An upper surface engaging portion 17A and a lower surface engaging portion 17B are formed to keep the vertical, horizontal positional relationship between U, 10, and 10L constant. Due to the engagement of the engaging portions 17A, 17B, the article transport containers 10U, 10, 10L are collapsed when the article transport containers 10U, 10, 10L are stacked and transported, or the weight of the internal articles P, vibration during transport, and the like are caused. This prevents the upper article transport container 10U from being deeply fitted into the article transport container 10 to reduce the substantial depth of the article storage space 25. In particular, when the article storage space 25 becomes substantially shallow due to the weight or the like, the upper article transport container 10U
The article P in the article transport container 10 may be pushed by the lower surface of the article P, and in the worst case, the article P is damaged.

The upper surface engaging portion 17A in this embodiment is
The upper surface of the peripheral wall portion 11 has a stepped shape (recessed) one step downward on the inner peripheral side of the upper portion.
1 has a stepped shape that is recessed (raised) upward by one step on the outer peripheral side of the lower part of the container 1.
0 and the other article transport containers 10U, 10U
L, which is in contact with and overlaps with the horizontal step portion of the engaging portion, so that the vertical distance between the article transport containers is kept constant.

The rib 23 partitioning the article storage recess 21 is provided between the upper sheet A and the lower sheet A by the reinforcing space 2.
4 are formed to be hollow. In this embodiment, the ribs 23B of the lower sheet B are formed lower than the ribs 23A of the upper sheet A so as to leave a space above the ribs 23A of the upper sheet A. A ribs 23A, 23B
Sides are overlapping. The overlapping portion 26 on the side surfaces of the ribs 23A and 23B may not be bonded with an adhesive or the like. Of course, if bonded, the strength and rigidity of the article transport container 10 will be improved.

In a plurality of article storage spaces 25 partitioned by the ribs 23, the upper sheet A and the lower sheet B are adhered to each other with an adhesive or the like at the bottom surface 27 thereof. The bonding at the bottom surface 27 is more preferably performed over the entire bottom surface 27 of the article storage space 25 from the viewpoint of improving the strength and rigidity of the article transport container 10.

The article transport container 10 having the above-described structure has a double structure of an upper sheet A and a lower sheet B, and is hollow between the upper sheet A and the lower sheet B at the peripheral wall 11 and the ribs 23. Peripheral spaces 1, 24 are formed so as to sandwich the reinforcing spaces 13, 24.
1 outer peripheral flange portion 12 and bottom surface 27 of article storage space 25
Since the upper sheet A and the lower sheet B are bonded and bonded to each other at the portion, the strength and rigidity are high, deformation and distortion hardly occur, and the precision is high.

In the article transport container 10 of the above embodiment, the lower sheet B is also bent upward at the rib 23 to form a rib shape. However, the size of the article transport container 10, the type of stored articles, etc. Depending on the strength and rigidity may not be required as much as the article transport container 10 of the embodiment,
In that case, the lower sheet B may have a flat lower surface without forming ribs as in the article transport container 50 according to another embodiment of the present invention shown in FIG.
Other configurations are the same as those of the article transport container 10 of the above embodiment.

[0024]

As described above, according to the article transport container of the first aspect of the present invention, two plastic sheets consisting of an upper sheet and a lower sheet formed by vacuum forming are laminated and bonded. Having a hollow reinforcing space between the upper sheet and the lower sheet at the peripheral wall portion and the rib portion, and an outer peripheral flange portion of the peripheral wall portion located so as to sandwich the reinforcing space and a bottom surface of the article storage space. Since the upper sheet and the lower sheet are overlapped and adhered to each other, the strength and rigidity can be increased while maintaining the lightness of the article transport container, and deformation and distortion are less likely to occur and accuracy is high.
Further, since the upper sheet and the lower sheet are formed by vacuum molding, shrinkage and deformation after molding are less likely to occur as compared with injection molded products and foam molded products, thereby increasing the accuracy of the article transport container. Therefore, the article transport container according to the first aspect of the present invention is particularly suitable for precision electronic components such as integrated circuits in which vibration during transportation is a problem.

Further, since the article transport container of the first aspect of the present invention is excellent in light weight as described above, the transport cost can be reduced when a large number of articles are transported in a stacked manner.
Further, the article transport container according to the first aspect of the present invention has a lower molding cost and is more economical than forming an article transport container having the same strength and rigidity by using an injection molded product or a foam molded product. In addition, since it consists of laminating the upper sheet and the lower sheet, one of the upper and lower sheets can be made different from the other sheet in material, color, thickness, and filler, etc. The degree of freedom can be increased, and the cost can be reduced.

Further, according to the first aspect of the present invention, the ribs of the lower sheet are formed lower than the ribs of the upper sheet.
Since the rib side surface of the lower sheet overlaps the rib side surface of the upper sheet, the overlapping portion increases the strength and accuracy of the rib portion, further improving the strength and accuracy of the entire article transport container.

Further, according to the second aspect of the present invention, the upper sheet and the lower sheet are bonded to each other at the overlapping portion on the side surface of the rib of the upper sheet and the rib of the lower sheet, so that the strength of the article transport container is improved. And the rigidity is further improved.

According to the article transport container of the third aspect of the present invention, since no rib is formed on the lower sheet, there is an effect of increasing the stability of the container, and the article transport container of the first aspect has strength and rigidity. This is effective when less demanding is required.

According to the article transport container of the fourth aspect,
An engaging portion is formed on the upper and lower surfaces of the peripheral wall portion so as to engage with other upper and lower article transport containers at the time of stacking the article transport containers and to maintain a constant positional relationship between the article transport containers in the vertical and horizontal directions. When the articles are stacked and transported, the upper article transport container does not collapse, and furthermore, due to the weight of the stored articles and the vibration at the time of transport, the vertical distance between the article transport containers becomes narrower and the depth of the article storage space becomes deeper. It does not become shallow. Therefore, articles can always be stored and transported safely.

According to the fifth aspect of the present invention, the upper sheet and the lower sheet are adhered to each other over the entire bottom surface of the article storage space, so that the strength and rigidity of the article transport container are further increased. .

[Brief description of the drawings]

FIG. 1 is a perspective view of an article transport container according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a cross-sectional view illustrating a state in which the article transport containers of FIG. 1 are stacked and used.

FIG. 4 is a sectional view of an article transport container according to another embodiment of the present invention.

[Description of Signs] 10 Article transport container 11 Peripheral wall portion 12 Outer peripheral flange portion 13 Reinforcement space of peripheral wall portion 17A Upper surface engaging portion 171A Horizontal step portion of upper surface engaging portion 17B Lower surface engaging portion 171B Horizontal step of lower surface engaging portion Part 21 Article storage recess 23 Rib 24 Reinforcement space for rib part 25 Article storage space 26 Overlap of rib part side surface 27 Bottom surface of article storage space A Upper sheet B Lower sheet P Article

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E006 AA03 BA01 CA02 DA01 DB01 3E033 AA10 BA22 BB07 CA02 DD01 FA04 GA03 3E096 AA09 BA08 BB08 CA06 CB02 CC02 EA02X FA20 FA23 GA01

Claims (5)

[Claims] 1. A plastic article transport container provided with a storage recess surrounded by a peripheral wall portion, wherein the storage recess is partitioned into a plurality of article storage spaces by ribs bent at the bottom surface thereof. It is formed by laminating two plastic sheets consisting of an upper sheet and a lower sheet formed by laminating, and a space is formed between the upper sheet and the lower sheet at the peripheral wall portion and the rib portion to form a hollow space. Further, in the peripheral wall portion, an edge of the upper sheet and the edge of the lower sheet overlap to form an outer peripheral flange portion protruding outward from a side portion of the peripheral wall portion, and the upper sheet and the lower side are formed on the outer peripheral flange portion and the article storage space bottom surface. An article transport container having a sheet bonded thereto. 2. The ribs of the lower sheet are formed lower than the ribs of the upper sheet so as to leave a space above the ribs of the upper sheet, and the ribs of the lower sheet are fitted into the ribs of the upper sheet. 2. The article transport container according to claim 1, wherein the side faces of the ribs overlap. 3. The article transport container according to claim 1, wherein only the upper sheet has a rib shape at the rib portion, and the lower sheet is flat. 4. An upper and lower surface of the peripheral wall portion is provided with an engaging portion which engages with other upper and lower article transport containers when the article transport containers are stacked to keep the vertical and horizontal positional relationship between the article transport containers constant. The article transport container according to claim 1, wherein the article transport container is formed. 5. The engaging portion on the upper surface of the peripheral wall portion has a stepped shape depressed downward on the upper inner peripheral side of the peripheral wall portion, and the engaging portion on the lower surface of the peripheral wall portion upwards on the lower outer peripheral side of the peripheral wall portion. It has a concave step shape, and the horizontal step portion in both the engaging portions overlaps with the horizontal step portion of the engaging portion in the other upper and lower article transport containers when the article transport containers are stacked, and the vertical interval between the article transport containers is constant. The article transport container according to any one of claims 1 to 4, characterized in that the article transport container is maintained at the following.