Tray

Abstract

To provide a tray easy to disassemble its packaging container.SOLUTION: A tray 10 comprises a plate-like base 11, a receiving recess 12 recessed from a first face 11a of the base 11, a mating protrusion 13 protruding from the first face 11a, a mating recess 14 recessed from the first face 11a, and a first cut-out 15 provided at a peripheral edge of the base 11. The receiving recess 12 is positioned between the mating protrusion 13 and the mating recess 14. Provided that a direction in which the mating protrusion 13, the receiving recess 12, and the mating recess 14 are arranged is a first direction and a direction orthogonal to a wall-thickness direction of the base 11 and to the first direction is a second direction, the mating protrusion 13 and the mating recess 14 are provided extending along the second direction and at a position line-symmetric about a first virtual line L1 passing through a center of the receiving recess 12 in the first direction. The first cut-out 15 is provided extending along the first direction and line-asymmetric about a second virtual line L2 passing through the center of the receiving recess 12 in the second direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a tray. [Background technology]

[0002] Patent Document 1 describes a packaging container made up of two cushioning members. Each cushioning member is provided with a fitting convex portion and a fitting concave portion. By stacking one cushioning member on the other cushioning member, the fitting convex portion of one cushioning member fits into the fitting concave portion of the other cushioning member, and the fitting convex portion of the other cushioning member fits into the fitting concave portion of the one cushioning member. In this way, the two cushioning members are assembled by convex-concave fitting to form a packaging container. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-058863 Summary of the Invention [Problem to be solved by the invention]

[0004] In such a packaging container, it is required that the packaging container be easily disassembled by pulling the two cushioning members apart. [Means for solving the problem]

[0005] A tray for solving the above problems has a flat base, an accommodating recess recessed from a first surface of the base, an engaging protrusion protruding from the first surface, an engaging recess recessed from the first surface, and a notch provided in a peripheral portion of the base, wherein the accommodating recess is located between the engaging protrusion and the engaging recess, and when a direction in which the engaging protrusion, the accommodating recess, and the engaging recess are aligned is defined as a first direction and a direction perpendicular to the plate thickness direction of the base and the first direction is defined as a second direction, the engaging protrusion and the engaging recess are provided in a position that is line-symmetrical with respect to a first virtual line that extends along the second direction and passes through a center of the accommodating recess in the first direction, and the notch is provided asymmetrical with respect to a second virtual line that extends along the first direction and passes through the center of the accommodating recess in the second direction.

[0006] According to the above configuration, the mating protrusion and mating recess are provided at positions that are line-symmetrical with respect to the first imaginary line. Therefore, when the two trays are stacked with their first surfaces facing each other, the mating protrusion of one tray is mated with the mating recess of the other tray, and the mating protrusion of the other tray is mated with the mating recess of the one tray. In this way, the two trays are assembled by mating with each other to form a packaging container.

[0007] The tray has a notch provided on the periphery of the base. The notch is provided asymmetrically with respect to the second virtual line. Therefore, when the two trays are assembled, the notch of one tray overlaps with a portion of the base of the other tray where the notch is not provided in the plate thickness direction of the base. That is, the notch of one tray causes a portion of the other tray that does not overlap with the one tray. Also, the notch of the other tray overlaps with a portion of the base of the one tray where the notch is not provided in the plate thickness direction of the base. That is, the notch of the other tray causes a portion of the one tray that does not overlap with the other tray. Therefore, when disassembling the packaging container, the two trays can be easily separated by pinching the portion where only one tray is present with fingers. This makes it easier to disassemble the packaging container.

[0008] The above tray may have a groove portion recessed from the first surface of the base and extending across the entire base in the second direction, and the groove portion may be located between the mating convex portion and the accommodating recess, and between the mating recess and the accommodating recess in the first direction.

[0009] According to the above configuration, a portion of the base portion located on the opposite side of the one groove portion from the accommodating recess in the first direction is easily deflected from the one groove portion as a starting point, which makes it easier to release the engagement between the fitting protrusion and the fitting recess located on one side of the accommodating recess in the first direction.

[0010] In addition, when the mated state of the mating protrusion and mating recess located on one side of the accommodating recess in the first direction is released, the portion of the base located closer to the accommodating recess than the other groove in the first direction is likely to bend with the other groove as a starting point. Therefore, the object can be inserted and removed from the accommodating recess while maintaining the mated state of the mating protrusion and mating recess located on the other side of the accommodating recess in the first direction.

[0011] Therefore, for example, in a situation where a plurality of objects are stored in the storage recess and some of the objects are to be removed from the storage recess, some of the objects can be removed from the storage recess without completely separating the two trays. Also, after some of the objects have been removed from the storage recess, the packaging container can be returned to the storage state simply by fitting the fitting protrusion located on one side of the storage recess in the first direction into the fitting recess.

[0012] The above tray may have a hook portion having a first portion extending from the base in the first direction and a second portion extending from a tip of the first portion in the second direction, and the hook portion may define a hook hole together with the hook portion of the other tray when assembled with the other tray.

[0013] According to the above configuration, the tray or the packaging container can be hooked to the hook by the hooking portion. In addition, when the two trays are assembled, the two hooking portions define a hooking hole. Therefore, by inserting the hook into the hooking hole, the packaging container can be more stably hooked to the hook.

[0014] As a configuration for enabling the tray or packaging container to be hung on a hook, for example, a through hole may be provided in the base. However, in this case, a drilling process is required to form the through hole in the base, which reduces the productivity of the tray. Furthermore, the portion of the base where the through hole is formed becomes waste. In contrast, the above configuration does not require a drilling process, which improves the productivity of the tray. Furthermore, the generation of waste can be avoided.

[0015] In the above tray, the mating protrusion may include a first mating protrusion and a second mating protrusion, and the mating recess may include a first mating recess and a second mating recess, the first mating protrusion and the second mating protrusion may be arranged in point-symmetric positions around the intersection of the first virtual line and the second virtual line, and the first mating recess and the second mating recess may be arranged in point-symmetric positions around the intersection.

[0016] For example, when the tray has one mating protrusion and one mating recess, when the two trays are stacked so that the first directions are aligned, the mating protrusions may face each other and the mating recesses may face each other. In this case, in order to assemble the two trays, it is necessary to change the orientation of one of the trays so that the mating protrusion and the mating recess face each other. In contrast, in the above configuration, the tray has two mating protrusions and two mating recesses. The first mating protrusion and the second mating protrusion are provided at positions that are point-symmetrical with respect to the intersection of the first virtual line and the second virtual line. In addition, the first mating recess and the second mating recess are provided at positions that are point-symmetrical with respect to the intersection of the first virtual line and the second virtual line. Therefore, when the two trays are stacked so that the first directions are aligned, the mating protrusion and the mating recess face each other. Therefore, it is easy to assemble the two trays. Effect of the Invention

[0017] According to the present invention, the packaging container can be easily disassembled. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view showing a packaging container according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view showing a packaging container according to an embodiment. [Diagram 3] FIG. 3 is a front view showing the packaging container of the embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. [Diagram 5] FIG. 5 is a front view showing a modified example of the packaging container. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, one embodiment of the tray will be described with reference to Figs. As shown in Fig. 1 and Fig. 2, a packaging container 100 is formed by two trays 10. The packaging container 100 is a container for storing an object to be contained (not shown). In this embodiment, the two trays 10 have the same shape. When distinguishing between the two trays 10, one tray 10 is referred to as a first tray 10a, and the other tray 10 is referred to as a second tray 10b. Examples of methods for forming the trays 10 include vacuum forming and injection molding.

[0020] <Tray> The tray 10 has a flat base 11. In this embodiment, the base 11 is rectangular. The base 11 has a first surface 11a and a second surface 11b. The first surface 11a and the second surface 11b are surfaces that are perpendicular to the thickness direction of the base 11. The second surface 11b is the surface opposite to the first surface 11a.

[0021] The base 11 has a first edge 11c, a second edge 11d, a third edge 11e, and a fourth edge 11f. The first edge 11c, the second edge 11d, the third edge 11e, and the fourth edge 11f are each part of the periphery of the base 11. The first edge 11c and the second edge 11d each extend along the short side of the base 11. The second edge 11d is located on the opposite side of the first edge 11c in the longitudinal direction of the base 11. The third edge 11e and the fourth edge 11f each extend along the long side of the base 11. The fourth edge 11f is located on the opposite side of the third edge 11e in the short side of the base 11.

[0022] The tray 10 has an accommodating recess 12. The accommodating recess 12 is recessed from a first surface 11a of the base 11. The accommodating recess 12 is also a protrusion protruding from a second surface 11b of the base 11. When the tray 10 is viewed from the plate thickness direction of the base 11, the accommodating recess 12 in this embodiment is square-shaped.

[0023] The tray 10 has a fitting protrusion 13. The fitting protrusion 13 protrudes from the first surface 11a of the base 11. The fitting protrusion 13 in this embodiment is also a recess recessed from the second surface 11b of the base 11. The fitting protrusion 13 in this embodiment is cylindrical.

[0024] The tray 10 of this embodiment has two such fitting protrusions 13. When distinguishing between the two fitting protrusions 13, one fitting protrusion 13 is referred to as a first fitting protrusion 13a, and the other fitting protrusion 13 is referred to as a second fitting protrusion 13b. The first fitting protrusion 13a is located closer to the first edge 11c than the accommodating recess 12 in the longitudinal direction of the base 11. The second fitting protrusion 13b is located closer to the second edge 11d than the accommodating recess 12 in the longitudinal direction of the base 11.

[0025] The tray 10 has a fitting recess 14. The fitting recess 14 is recessed from the first surface 11a of the base 11. The fitting recess 14 is also a protrusion protruding from the second surface 11b of the base 11. In this embodiment, the fitting recess 14 has a first space 141 and two second spaces 142 communicating with the first space 141. The first space 141 is a cylindrical space. The inner diameter of the first space 141 is approximately the same as the outer diameter of the fitting protrusion 13. The two second spaces 142 are disposed at equal intervals in the circumferential direction of the first space 141. The first space 141 is located between the two second spaces 142 in the short direction of the base 11.

[0026] The tray 10 of this embodiment has two such fitting recesses 14. When distinguishing between the two fitting recesses 14, one fitting recess 14 is referred to as a first fitting recess 14a, and the other fitting recess 14 is referred to as a second fitting recess 14b. The first fitting recess 14a is located closer to the first edge 11c than the accommodating recess 12 in the longitudinal direction of the base 11. The second fitting recess 14b is located closer to the second edge 11d than the accommodating recess 12 in the longitudinal direction of the base 11.

[0027] The first fitting protrusion 13a and the first fitting recess 14a are aligned in the short-side direction of the base 11. The first fitting protrusion 13a is located on the fourth edge 11f side in the short-side direction of the base 11. The first fitting recess 14a is located on the third edge 11e side in the short-side direction of the base 11. The second fitting protrusion 13b and the second fitting recess 14b are aligned in the short-side direction of the base 11. The second fitting protrusion 13b is located on the third edge 11e side in the short-side direction of the base 11. The second fitting recess 14b is located on the fourth edge 11f side in the short-side direction of the base 11.

[0028] The accommodating recess 12 is located between the fitting protrusion 13 and the fitting recess 14. In this embodiment, the accommodating recess 12 is located between the first fitting protrusion 13a and the second fitting recess 14b. Also, the accommodating recess 12 is located between the second fitting protrusion 13b and the first fitting recess 14a. The direction in which the fitting protrusion 13, the accommodating recess 12, and the fitting recess 14 are aligned is defined as a first direction. In this embodiment, the first direction coincides with the longitudinal direction of the base 11. Also, the direction perpendicular to the plate thickness direction of the base 11 and the first direction is defined as a second direction. In this embodiment, the second direction coincides with the lateral direction of the base 11.

[0029] 3, a virtual line extending along the second direction and passing through the center of the accommodating recess 12 in the first direction is defined as a first virtual line L1. A virtual line extending along the first direction and passing through the center of the accommodating recess 12 in the second direction is defined as a second virtual line L2.

[0030] The fitting protrusion 13 and the fitting recess 14 are provided at positions that are line-symmetrical with respect to the first imaginary line L1. In this embodiment, the first fitting protrusion 13a and the second fitting recess 14b are provided at positions that are line-symmetrical with respect to the first imaginary line L1. The second fitting protrusion 13b and the first fitting recess 14a are provided at positions that are line-symmetrical with respect to the first imaginary line L1.

[0031] In this embodiment, the first fitting protrusion 13a and the second fitting protrusion 13b are provided at positions that are point symmetrical about the intersection point Q of the first virtual line L1 and the second virtual line L2. The first fitting recess 14a and the second fitting recess 14b are provided at positions that are point symmetrical about the intersection point Q of the first virtual line L1 and the second virtual line L2.

[0032] The tray 10 has a first notch 15 as a notch. The first notch 15 is recessed from the peripheral edge of the base 11. In this embodiment, the first notch 15 is recessed from the second edge 11d of the base 11. The first notch 15 is provided asymmetrically with respect to the second imaginary line L2. The first notch 15 in this embodiment is provided on the third edge 11e side of the center of the storage recess 12 in the second direction. The first notch 15 in this embodiment is semicircular. The second edge 11d of the base 11 and the edge of the first notch 15 are smoothly connected.

[0033] The tray 10 of this embodiment has a groove 16. The groove 16 is recessed from the first surface 11a of the base 11. The groove 16 is also a protrusion protruding from the second surface 11b of the base 11. The thickness of the portion of the base 11 that defines the groove 16 is the same as the thickness of the other portion that does not define the groove 16. The groove 16 extends over the entire base 11 in the second direction. The groove 16 is located between the accommodating recess 12 and the fitting protrusion 13, and between the accommodating recess 12 and the fitting recess 14 in the first direction. When distinguishing between the two grooves 16, one groove 16 is referred to as a first groove 16a, and the other groove 16 is referred to as a second groove 16b. The first groove 16a is located between the first fitting protrusion 13a and the first fitting recess 14a, and the accommodating recess 12 in the first direction. The second groove portion 16b is located between the second fitting protrusion portion 13b and the second fitting recess portion 14b and the accommodating recess portion 12 in the first direction.

[0034] The tray 10 of this embodiment has a second notch 17. The second notch 17 is recessed from the first edge portion 11c of the base portion 11. The second notch 17 is located in the center of the first edge portion 11c in the second direction.

[0035] The tray 10 of this embodiment has a hook portion 18. The hook portion 18 is integrally formed with the base portion 11. The hook portion 18 is L-shaped. The hook portion 18 has a first portion 18a extending in a first direction from a part of the first edge portion 11c of the base portion 11, and a second portion 18b extending in a second direction from a tip end of the first portion 18a. In this embodiment, the first portion 18a extends from a portion of the first edge portion 11c located closer to the fourth edge portion 11f than the second notch 17. The second portion 18b is aligned with the second notch 17 at an interval in the first direction.

[0036] <Packaging container> As shown in FIG. 4, the two trays 10 are stacked so that the first surfaces 11a face each other. The first and second directions of the first tray 10a are aligned with the first and second directions of the second tray 10b, respectively. The inner bottom surface of the storage recess 12 of the first tray 10a and the inner bottom surface of the storage recess 12 of the second tray 10b face each other in the plate thickness direction of the base 11. The fitting protrusion 13 of the first tray 10a is fitted into the fitting recess 14 of the second tray 10b. The fitting protrusion 13 of the second tray 10b is fitted into the fitting recess 14 of the first tray 10a. In this embodiment, the outer peripheral surface of the fitting protrusion 13 is in contact with the inner peripheral surface that defines the first space 141 of the fitting recess 14, but is not in contact with the surface that defines the second space 142 of the fitting recess 14.

[0037] In this embodiment, the first fitting protrusion 13a of the first tray 10a is fitted into the first fitting recess 14a of the second tray 10b. The second fitting protrusion 13b of the first tray 10a is fitted into the second fitting recess 14b of the second tray 10b. The first fitting protrusion 13a of the second tray 10b is fitted into the first fitting recess 14a of the first tray 10a. The second fitting protrusion 13b of the second tray 10b is fitted into the second fitting recess 14b of the first tray 10a.

[0038] In this manner, the two trays 10 are assembled by recess-projection fitting. The assembly of the two trays 10 forms the packaging container 100. The packaging container 100 has a storage space S formed by the two storage recesses 12.

[0039] As shown in FIG. 3, in a state where the two trays 10 are assembled, the first notch 15 of the first tray 10a overlaps with a portion of the base 11 of the second tray 10b where the first notch 15 is not provided in the thickness direction of the base 11. As a result, a non-overlapping portion 19 that does not overlap with the first tray 10a is generated in the second tray 10b. In the non-overlapping portion 19 of the second tray 10b, the first surface 11a of the base 11 of the second tray 10b is exposed. In addition, the first notch 15 of the second tray 10b overlaps with a portion of the base 11 of the first tray 10a where the first notch 15 is not provided in the thickness direction of the base 11. As a result, a non-overlapping portion 19 that does not overlap with the second tray 10b is generated in the first tray 10a. In the non-overlapping portion 19 of the first tray 10a, the first surface 11a of the base 11 of the first tray 10a is exposed.

[0040] 4, when the two trays 10 are assembled, the first groove 16a of the first tray 10a and the first groove 16a of the second tray 10b face each other in the thickness direction of the base 11. The second groove 16b of the first tray 10a and the second groove 16b of the second tray 10b face each other in the thickness direction of the base 11.

[0041] 3, when the two trays 10 are assembled, the second notch 17 of the first tray 10a and the second notch 17 of the second tray 10b overlap in the thickness direction of the base 11. Also, the second portion 18b of the hook portion 18 of the first tray 10a and the second portion 18b of the hook portion 18 of the second tray 10b overlap in the thickness direction of the base 11. A hook hole H is defined by the hook portion 18 of the first tray 10a, the hook portion 18 of the second tray 10b, and edges of the second notches 17 of the two trays 10.

[0042] [Actions and Effects of the Present Embodiment] The effects and advantages of this embodiment will be described. (1) The tray 10 of this embodiment has a first notch 15 provided on the periphery of the base 11. The first notch 15 is provided asymmetrically with respect to the second virtual line L2. Therefore, when the two trays 10 are assembled, the first notch 15 of the first tray 10a overlaps with a portion of the base 11 of the second tray 10b where the first notch 15 is not provided. That is, the first notch 15 of the first tray 10a causes a non-overlapping portion 19 of the second tray 10b that does not overlap with the first tray 10a. Also, the first notch 15 of the second tray 10b overlaps with a portion of the base 11 of the first tray 10a where the first notch 15 is not provided. That is, the first notch 15 of the second tray 10b causes a non-overlapping portion 19 of the first tray 10a that does not overlap with the second tray 10b. Therefore, when disassembling the packaging container 100, the two trays 10 can be easily separated by pinching the portion where only one of the trays 10 exists, i.e., the non-overlapping portion 19, with the fingers. This makes it easy to disassemble the packaging container 100.

[0043] (2) As the two trays 10 constituting the packaging container 100, for example, one tray 10 may have only the fitting convex portion 13, and the other tray 10 may have only the fitting concave portion 14. In this case, in order to form the packaging container 100, it is necessary to separately prepare a tray 10 having the fitting convex portion 13 and a tray 10 having the fitting concave portion 14.

[0044] In contrast, the tray 10 of this embodiment has both the fitting protrusion 13 and the fitting recess 14, and the fitting protrusion 13 and the fitting recess 14 are provided at positions that are line-symmetrical with respect to the first virtual line L1. Therefore, the tray 10 can be either one or the other of the two trays 10 that constitute the packaging container 100. Therefore, it is not necessary to separately prepare a tray 10 having the fitting protrusion 13 and a tray 10 having the fitting recess 14 to form the packaging container 100.

[0045] (3) The tray 10 of this embodiment has a groove 16 recessed from the first surface 11a of the base 11 and extending over the entire base 11 in the second direction. The groove 16 is located between the fitting protrusion 13 and the accommodating recess 12 and between the fitting recess 14 and the accommodating recess 12 in the first direction. The tray 10 of this embodiment has a first groove 16a and a second groove 16b as the groove 16. The first groove 16a is located between the first fitting protrusion 13a and the first fitting recess 14a and the accommodating recess 12 in the first direction. The second groove 16b is located between the second fitting protrusion 13b and the second fitting recess 14b and the accommodating recess 12 in the first direction.

[0046] According to this configuration, the portion of the base 11 located on the opposite side of the second groove 16b from the accommodating recess 12 in the first direction, i.e., the portion located closer to the second edge 11d than the second groove 16b in the first direction, is more likely to bend with the second groove 16b as a starting point. Therefore, it becomes easier to release the engaged state between the second fitting protrusion 13b and the second fitting recess 14b located closer to the second edge 11d than the accommodating recess 12 in the first direction.

[0047] Furthermore, in a state where the second fitting protrusion 13b and the second fitting recess 14b are disengaged from each other, a portion of the base 11 located closer to the accommodating recess 12 than the first groove 16a in the first direction, i.e., a portion located closer to the second edge 11d than the first groove 16a in the first direction, becomes more likely to bend from the first groove 16a as a starting point. Therefore, the first fitting protrusion 13a and the first fitting recess 14a located closer to the first edge 11c than the accommodating recess 12 in the first direction can insert and remove an object into and from the accommodating recess 12 while maintaining the fitted state.

[0048] Therefore, for example, in a situation where a plurality of objects are stored in the storage recess 12 and some of the objects are to be removed from the storage recess 12, some of the objects can be removed from the storage recess 12 without completely separating the two trays 10. Moreover, after some of the objects have been removed from the storage recess 12, the packaging container 100 can be returned to the storage state simply by fitting the second fitting protrusion 13b into the second fitting recess 14b.

[0049] (4) The tray 10 of this embodiment has a hook portion 18 having a first portion 18a extending in a first direction from the base portion 11 and a second portion 18b extending in a second direction from a tip of the first portion 18a. Therefore, the tray 10 or the packaging container 100 can be hooked onto the hook by the hook portion 18. Furthermore, when the two trays 10 are assembled, a hook hole H is defined by the hook portion 18 of the first tray 10a and the hook portion 18 of the second tray 10b. Therefore, by inserting the hook into the hook hole H, the packaging container 100 can be more stably hooked onto the hook.

[0050] As a configuration for enabling the tray 10 or the packaging container 100 to be hung on a hook, for example, a through hole may be provided in the base 11. However, in this case, a punching step is required to form the through hole in the base 11, which reduces the productivity of the tray 10. Furthermore, the portion of the base 11 where the through hole is formed becomes waste. In contrast, in this embodiment, the punching step is not required, which improves the productivity of the tray 10. Furthermore, the generation of waste can be avoided.

[0051] (5) For example, when the trays 10 each have one mating protrusion 13 and one mating recess 14, when two trays 10 are stacked together so that their first directions are aligned, the mating protrusions 13 may face each other and the mating recesses 14 may face each other. In this case, in order to assemble the two trays 10, it is necessary to change the orientation of one of the trays 10 so that the mating protrusion 13 and the mating recess 14 face each other.

[0052] In contrast, in the above embodiment, the tray 10 has two each of the fitting protrusions 13 and the fitting recesses 14. The first fitting protrusions 13a and the second fitting protrusions 13b are provided at positions that are point symmetrical about the intersection point Q of the first virtual line L1 and the second virtual line L2. The first fitting recesses 14a and the second fitting recesses 14b are provided at positions that are point symmetrical about the intersection point Q of the first virtual line L1 and the second virtual line L2. Therefore, when the two trays 10 are stacked so that their first directions match, the fitting protrusions 13 and the fitting recesses 14 face each other. Therefore, it is easy to assemble the two trays 10.

[0053] (6) In this embodiment, the first tray 10a and the second tray 10b have the same shape. In this case, only one type of mold is required for forming the tray 10, which improves the productivity of the tray 10. (7) In the present embodiment, the non-overlapping portion 19 is provided by providing the first notch 15 in the tray 10. Therefore, for example, compared to a case in which the non-overlapping portion 19 is provided by providing the tray 10 with a portion protruding from the base 11, the size of the packaging container 100 can be prevented from increasing.

[0054] (8) In this embodiment, the fitting protrusion 13 is also a recess recessed from the second surface 11b of the base 11. Moreover, the fitting recess 14 is also a protrusion protruding from the second surface 11b of the base 11. This can increase the rigidity of the tray 10.

[0055] (9) The fitting protrusion 13 of this embodiment is cylindrical. The fitting recess 14 of this embodiment has a cylindrical first space 141 and a second space 142 that communicates with the first space 141 and is not in contact with the fitting protrusion 13 when the fitting protrusion 13 is fitted into the fitting recess 14. According to this configuration, the second space 142 can reduce the contact area between the outer circumferential surface of the fitting protrusion 13 and the surface that defines the fitting recess 14, making it easier to insert and remove the fitting protrusion 13 into and from the fitting recess 14.

[0056] In the above embodiment, the outer diameter of the fitting protrusion 13 is approximately the same as the inner diameter of the first space 141, but it may be larger than the inner diameter of the first space 141. In this case, the deformation of the fitting protrusion 13 when the fitting protrusion 13 is fitted into the fitting recess 14 can be accommodated by the second space 142. That is, the fitting protrusion 13 is fitted into the fitting recess 14 so as to bite into the second space 142. Therefore, the fitting protrusion 13 is less likely to come out of the fitting recess 14.

[0057] In this way, since the mating recess 14 has a second space 142 in addition to a first space 141 of the same shape as the mating protrusion 13, the mating force of the mating protrusion 13 relative to the mating recess 14 can be easily adjusted by adjusting the size relationship between the outer diameter of the mating protrusion 13 and the inner diameter of the first space 141.

[0058] (10) A plurality of second spaces 142 are provided at equal intervals in the circumferential direction of the first space 141. As a result, when the outer diameter of the fitting protrusion 13 is made larger than the inner diameter of the first space 141, the deformation of the fitting protrusion 13 can be accommodated by the plurality of second spaces 142. Also, the positions at which the fitting protrusion 13 bites into the second spaces 142 are uniform in the circumferential direction of the first space 141. Therefore, the fitting protrusion 13 is less likely to come out of the fitting recess 14.

[0059] [Example of change] The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0060] In the above embodiment, the shape of the accommodating recess 12 when viewed from the plate thickness direction of the base 11 is a square shape, but is not limited to this. The shape of the accommodating recess 12 may be appropriately changed depending on the shape of the object to be accommodated.

[0061] The two trays 10 constituting the packaging container 100 do not have to be of the same shape. However, the fitting convex portion 13 and the fitting concave portion 14 of each tray 10 are configured such that the fitting convex portion 13 of one tray 10 can be fitted into the fitting concave portion 14 of the other tray 10, and the fitting convex portion 13 of one tray 10 can be fitted into the fitting concave portion 14 of the other tray 10.

[0062] For example, the depth of the accommodating recesses 12 of the first tray 10a and the depth of the accommodating recesses 12 of the second tray 10b may be different. For example, one tray 10 may have a hook portion 18, and the other tray 10 may not have a hook portion 18. In this case, the packaging container 100 can be hung on a hook by the hook portion 18 of one tray 10.

[0063] The shape of the fitting protrusion 13 may be changed as appropriate. Also, as long as the fitting protrusion 13 can be fitted into the fitting recess 14, the shape of the fitting recess 14 may be changed as appropriate. The second space 142 of the fitting recess 14 may be omitted. In other words, the fitting recess 14 may be a cylindrical space having the same shape as the fitting protrusion 13.

[0064] When the fitting recess 14 has the second space 142, the number of the second spaces 142 may be one or may be three or more. When the fitting recess 14 has a plurality of second spaces 142, the plurality of second spaces 142 are preferably disposed at equal intervals in the circumferential direction of the first space 141.

[0065] The fitting protrusion 13 does not have to be a recess recessed from the second surface 11b of the base 11, and may have a solid structure. In the above embodiment, the tray 10 has two each of the fitting protrusions 13 and the fitting recesses 14, but is not limited thereto. For example, the tray 10 may have only the first fitting protrusion 13a and the second fitting recess 14b in the above embodiment, or may have only the second fitting protrusion 13b and the first fitting recess 14a in the above embodiment.

[0066] In the above embodiment, the first cutout 15 is semicircular, but the present invention is not limited to this. The first cutout 15 may be rectangular, for example. In the above embodiment, the first notch 15 is provided in the second edge portion 11d of the base 11, but is not limited to this. For example, when the second notch 17 and the hook portion 18 are not provided in the first edge portion 11c of the base 11, the first notch 15 may be provided in the first edge portion 11c of the base 11. However, the first notch 15 is provided asymmetrically with respect to the second virtual line L2.

[0067] The fitting force between the first fitting protrusion 13a and the first fitting recess 14a may be different from the fitting force between the second fitting protrusion 13b and the second fitting recess 14b. Examples of the configuration for making the fitting force between the first fitting protrusion 13a and the first fitting recess 14a different from the fitting force between the second fitting protrusion 13b and the second fitting recess 14b include the following configurations.

[0068] For example, the first fitting protrusion 13a and the second fitting protrusion 13b have a tapered shape in which the outer diameter gradually increases from the base end to the tip. Also, the first fitting recess 14a and the second fitting recess 14b have a tapered shape in which the inner diameter gradually increases from the opening to the bottom. For example, the taper of the second fitting protrusion 13b and the second fitting recess 14b is formed to be gentler than the taper of the first fitting protrusion 13a and the first fitting recess 14a. In this case, the fitting force of the second fitting protrusion 13b and the second fitting recess 14b is weaker than the fitting force of the first fitting protrusion 13a and the first fitting recess 14a. Therefore, the fitting state of the second fitting protrusion 13b and the second fitting recess 14b is easily released, while the fitting state of the first fitting protrusion 13a and the first fitting recess 14a is easily maintained. Therefore, for example, it is suitable for a situation in which the objects to be stored are put into and taken out of the storage recesses 12 without completely separating the two trays 10.

[0069] Instead of the groove 16, the base 11 may be provided with a thin portion that is thinner than other portions of the base 11. The thin portion is formed, for example, by pressing the base 11. The thin portion may be recessed relative to the first surface 11a of the base 11, may be recessed relative to the second surface 11b of the base 11, or may be recessed relative to both the first surface 11a and the second surface 11b of the base 11. In this case, the same effect as effect (3) of the above embodiment can be obtained.

[0070] Instead of the grooves 16, the base 11 may have through holes that penetrate the base 11 in the plate thickness direction and are provided intermittently along the second direction. Also, instead of through holes, the thin portions described above may be provided intermittently along the second direction. In this case, the same effect as effect (3) of the above embodiment can be obtained.

[0071] The groove 16 may be omitted. The second notch 17 may be omitted. In this case, the hook hole H is defined by the hook portion 18 of the first tray 10a, the hook portion 18 of the second tray 10b, and the first edge portions 11c of the base portions 11 of the two trays 10.

[0072] In the above embodiment, the hook portion 18 is provided on the first edge portion 11c of the base portion 11, but this is not limited thereto. The hook portion 18 may be provided on the third edge portion 11e or the fourth edge portion 11f of the base portion 11.

[0073] The hook portion 18 may be omitted. The base 11 may be provided with a through hole penetrating the base 11 in the plate thickness direction instead of the hook portion 18. In this case, by inserting a hook into the through hole, the tray 10 or the packaging container 100 can be hooked onto the hook.

[0074] As shown in FIG. 5, the packaging container 100 may have a plate 20 separate from the two trays 10. The plate 20 is made of, for example, paper. The plate 20 has a plate body 21, a hook portion 22 extending from the plate body 21, and two through holes 21a penetrating the plate body 21. The plate body 21 is provided between the base 11 of the first tray 10a and the base 11 of the second tray 10b. The first fitting protrusion 13a of the first tray 10a and the first fitting protrusion 13a of the second tray 10b are inserted into the through holes 21a. The hook portion 22 has a first portion 22a extending from the plate body 21 in a first direction and a second portion 22b extending from a tip of the first portion 22a in a second direction.

[0075] In this case, the packaging container 100 can be hung on a hook by the hook portion 22. Furthermore, when the packaging container 100 is not hung on a hook, the packaging container 100 can be made smaller in size by removing the plate 20.

[0076] [Note] The technical ideas that can be understood from the above-described embodiment and modified examples will be described below. <Appendix 1> a tray having a flat base, an accommodating recess recessed from a first surface of the base, an engaging protrusion protruding from the first surface, an engaging recess recessed from the first surface, and a notch provided in a peripheral portion of the base, wherein the accommodating recess is located between the engaging protrusion and the engaging recess, and when a first direction is a direction in which the engaging protrusion, the accommodating recess, and the engaging recess are aligned and a second direction is a plate thickness direction of the base and a direction perpendicular to the first direction, the engaging protrusion and the engaging recess are provided in positions that are line-symmetrical with respect to a first imaginary line that extends along the second direction and passes through a center of the accommodating recess in the first direction, and the notch is provided asymmetrically with respect to a second imaginary line that extends along the first direction and passes through a center of the accommodating recess in the second direction.

[0077] <Appendix 2> 2. A tray as described in Appendix 1, having a groove portion recessed from the first surface of the base and extending across the entire base in the second direction, the groove portion being located between the mating convex portion and the accommodating recess, and between the mating recess and the accommodating recess in the first direction.

[0078] <Appendix 3> A tray as described in Appendix 1 or Appendix 2, which has a hook portion having a first portion extending from the base in the first direction and a second portion extending from a tip of the first portion in the second direction, and the hook portion defines a hook hole together with the hook portion of the other tray when assembled with the other tray.

[0079] <Appendix 4> A tray as described in any one of Appendices 1 to 3, having a first interlocking convex portion and a second interlocking convex portion as the interlocking convex portion, having a first interlocking recess portion and a second interlocking recess portion as the interlocking recess, the first interlocking convex portion and the second interlocking convex portion being provided in point-symmetric positions around an intersection point of the first virtual line and the second virtual line, and the first interlocking recess portion and the second interlocking recess portion being provided in point-symmetric positions around the intersection point. [Explanation of symbols]

[0080] 10…Tray 11...Base 11a...Side 1 12...Housing recess 13…Fitting protrusion 13a...First fitting protrusion 13b...Second fitting protrusion 14…Mating recess 14a...First fitting recess 14b...Second fitting recess 15...First notch as a notch 16…Groove 18…Hook section 18a…1st part 18b…Second part H…Hook hole L1: First virtual line L2: Second virtual line Q…intersection

Claims

1. A flat base; an accommodating recess recessed from a first surface of the base; A fitting protrusion protruding from the first surface; a fitting recess recessed from the first surface; A notch provided on a peripheral edge of the base; having The accommodating recess is located between the fitting protrusion and the fitting recess, When a direction in which the fitting convex portion, the accommodating concave portion, and the fitting concave portion are aligned is defined as a first direction, and a direction perpendicular to a plate thickness direction of the base portion and the first direction is defined as a second direction, the fitting protrusion and the fitting recess are provided at positions that are line-symmetrical with respect to a first virtual line that extends along the second direction and passes through a center of the accommodating recess in the first direction, The tray, wherein the notch is provided asymmetrically with respect to a second imaginary line that extends along the first direction and passes through a center of the accommodating recess in the second direction.

2. a groove portion recessed from the first surface of the base and extending over the entirety of the base in the second direction; The tray according to claim 1 , wherein the groove is located between the fitting protrusion and the accommodating recess and between the fitting recess and the accommodating recess in the first direction.

3. a hook portion having a first portion extending from the base portion in the first direction and a second portion extending from a tip end of the first portion in the second direction; The tray according to claim 1 , wherein the hook portion defines a hook hole together with the hook portion of the other tray when the tray is assembled with the other tray.

4. The fitting protrusion includes a first fitting protrusion and a second fitting protrusion, The fitting recess includes a first fitting recess and a second fitting recess, the first fitting protrusion and the second fitting protrusion are provided at positions that are point symmetrical with respect to an intersection point of the first virtual line and the second virtual line, The tray according to claim 1 , wherein the first fitting recess and the second fitting recess are provided at positions that are point-symmetric with respect to the intersection point.

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