JP7365040B2 - packaging container - Google Patents

Description

TECHNICAL FIELD This specification relates to packaging containers.

Patent Document 1 discloses a packaging container in which the top wall is closed by inserting an insertion piece connected to the top wall into an insertion hole arranged at the boundary between the front wall and the bottom wall. A locking tongue protrudes from the edge of the insertion hole via a hinge line. On the inside of the front wall, a front inner plate is arranged to overlap the front wall. A locking hole is bored in the insertion piece.

When the insertion piece is inserted into the insertion hole, the locking tongue piece is bent at the hinge line. When the insertion piece is completely inserted into the insertion hole, the bend at the hinge line tends to be restored. As a result, the locking tongue fits into the locking hole, and the insertion piece engages with the locking tongue.

JP 2017-1718 Publication

In the above technology, the locking tongue is designed so that when the insertion piece is inserted into the insertion hole, the locking tongue is largely bent at the hinge line or bent at a location other than the hinge line. It may not be possible to bend it into the correct position. If the locking tongue is not bent in the intended state, the locking tongue will not be properly restored even if the insertion piece is completely inserted into the insertion hole, and the locking tongue will fit into the locking hole. It may not be possible to do so. In this case, the insertion piece cannot engage with the locking tongue piece, and the insertion piece comes off from the insertion hole.

This specification provides a technique that allows the insertion piece to be properly locked in a state where it is inserted into the insertion opening.

A packaging container is disclosed herein. The packaging container includes an outer wall having an opening, a lid that covers the opening, an insertion piece connected to the lid, and an insertion opening that penetrates the outer wall and receives the insertion piece. an inner plate disposed along the inner surface of the outer wall; and a locking piece disposed on an extension of the inner plate and covering a part of the insertion port on the inner side of the outer wall. and a locking penetration part that penetrates the insertion piece and receives the locking piece.

When the insertion piece is inserted into the insertion opening, the insertion piece comes into contact with the locking piece, and the locking piece is pressed against the inside of the packaging container. In the above configuration, the locking piece is arranged inside the packaging container rather than the outer wall portion. Therefore, at least one of the locking piece and the inner plate connected to the locking piece can bend toward the inside of the packaging container without contacting parts such as the outer wall of the packaging container. As a result, the insertion piece can be inserted into the insertion slot by displacing the locking piece without bending the locking piece itself or the boundary between the locking piece and the inner plate. When the insertion piece is inserted into the insertion opening, the flexure of the locking piece or the inner plate is restored, and the locking piece is properly fitted into the locking penetrating portion. Thereby, the insertion piece is appropriately locked by the locking piece, and can be prevented from easily coming off from the insertion port.

An end edge of the locking piece opposite to the inner plate may be arranged at a position that does not extend beyond the insertion opening. According to this configuration, the amount of displacement of the locking piece when inserting the insertion piece can be suppressed.

The outer wall portion may include an opposing wall that faces the lid portion with a gap therebetween, and a side wall that surrounds a housing space for the packaging container between the lid portion and the opposing wall. The insertion piece is connected to the lid part via a connection wall extending along the side wall at a position outside the side wall of the packaging container, and the insertion opening is connected to the opposite wall and the side wall. The distance between the end edge of the locking piece opposite to the inner plate and the opposite wall in the direction in which the lid part and the opposing wall face each other is the distance between the end edge of the locking piece and the opposing wall. It may be shorter than the length of. According to this configuration, when the insertion piece is inserted into the insertion opening, at least a portion of the inner plate, the locking piece, and the opposing wall are bent, so that the insertion piece can be inserted into the insertion opening. can. Thereby, the insertion piece can be inserted without deforming the locking piece to the extent that it bends with respect to the inner plate at the boundary between the locking piece and the inner plate.

The inner plate and the side wall are connected to each other via a frame plate at their edges on the lid side, and the frame plate extends over the respective entire lengths of the inner plate and the side wall. The inner plate and the side wall may be connected to each other. According to this configuration, the strength of the packaging container can be improved compared to a configuration in which the frame plate is only partially connected to at least one of the inner plate and the side wall.

The inner plate and the side wall are connected to each other via a frame plate at their edges on the lid side, and the length of the locking penetration portion is from the outer surface of the side wall to the length of the locking piece. The distance may be approximately the same as the distance to the inner surface. According to this configuration, it is not necessary to form an engagement penetrating portion having a dimension that greatly exceeds the length between the inner plate and the side wall of the forehead plate. As a result, the length of the insertion piece can be suppressed.

The packaging container is assembled by bending a single blank, and the side wall includes a flat first side plate disposed between the inner side plate and the connecting wall, and a first side plate adjacent to the first side plate. a pair of second side plates, each of the pair of second side plates includes a flap extending between the first side plate and the inner side plate from an edge on the first side plate side, and the flap The edge on the opposing wall side may not be disposed on the opposing wall side beyond the edge on the opposing wall side of the first side plate. According to this configuration, when assembling the packaging container, it is not necessary to bend the flap in advance so that the flap does not come into contact with the lid portion and the opposing wall.

The insertion piece is connected to the lid at a position opposite to the side connected to the lid at a position where the insertion piece contacts the locking piece when inserted into the insertion opening. It may have a recess that is recessed toward the side end. According to this configuration, the tip of the insertion piece can be inserted into the locking piece before the insertion piece comes into contact with the locking piece. Thereby, when the insertion piece is further pushed in from the state where the insertion piece is in contact with the locking piece, the insertion piece can be guided along the insertion opening. As a result, the insertion piece can be prevented from coming off from the insertion opening.

The perspective view of the packaging container of 1st Example is shown. A developed view of the packaging container of the first example is shown. FIG. 3 shows a perspective view of the packaging container of the first embodiment with the lid opened. An enlarged view of the vicinity of the insertion opening in a state where the insertion piece of the packaging container of the first embodiment is inserted into the insertion opening is shown. FIG. 2 shows an enlarged view of the vicinity of the insert piece of the packaging container of the first embodiment, after the insert piece is inserted into the insertion opening, as seen from the inside of the packaging container. The sectional view of the area around the insertion piece at the center of the insertion piece of the packaging container of the first embodiment is shown after the insertion piece is inserted into the insertion opening. A developed view of the packaging container of the second example is shown. A developed view of the packaging container of the third example is shown. The perspective view of the packaging container of 3rd Example in the state where the lid part is opened is shown. A developed view of the packaging container of the fourth example is shown. The perspective view of the packaging container of 4th Example in the state where the lid part is opened is shown.

(First example)
A packaging container 10 according to a first embodiment will be described with reference to FIGS. 1 to 6. The packaging container 10 is used for packaging contents such as daily necessities. As shown in FIG. 1, the packaging container 10 is made of, for example, corrugated paper, but the material of the packaging container 10 may be paper other than corrugated paper, and is not limited to paper, and may be made of plastic or the like. Good too. In addition, in this example, for convenience, explanation is made using the front, back, top, bottom, left and right directions shown in FIG. 1, but this does not represent the directions in which the packaging container 10 is used.

(Configuration of packaging container 10)
The packaging container 10 has a rectangular parallelepiped shape including an outer wall portion 11 and a lid portion 12. As shown in FIG. 3, the outer wall portion 11 includes a side wall 13 and a bottom wall 22. The bottom wall 22 has a rectangular flat plate shape. The side walls 13 extend perpendicularly upward from the outer peripheral edges of the four sides of the bottom wall 22 . The side wall 13 defines a rectangular opening 17 at its upper end.

As shown in FIG. 2, the packaging container 10 is assembled by bending a single flat plate blank 100. In addition, in FIG. 2, the broken line represents a folding line. The side wall 13 includes a front plate 16, left and right side plates 18 and 14, and a rear plate 15. The front plate 16 is connected to the front edge of the bottom wall 22 via a folded line. The front plate 16 has a rectangular flat plate shape. The rear plate 15 is connected to the rear edge of the bottom wall 22 via a folded line. The rear plate 15 has a rectangular flat plate shape arranged parallel to the front plate 16. Each of the side plates 14 and 18 is connected to each of the left and right edges of the bottom wall 22 via a folding line. The side plates 14 and 18 have the same rectangular flat plate shape. The lengths of the side plates 14 and 18 in the vertical direction are approximately the same as that of the front plate 16. Each of the side plates 14 and 18 is arranged adjacent to the front plate 16 and the rear plate 15.

A flap 50 is connected to the front edge of the side plate 18. The flap 50 is connected to the front edge of the side plate 18 via a folding line. The flap 50 has a flat plate shape. The flap 50 is arranged inside the front plate 16 and along the front plate 16. The flap 50 has the same length as the side plate 18 in the vertical direction from the end on the side plate 18 side to the intermediate position toward the side plate 14. The lower edge of the flap 50 is arranged slightly above the lower edge of the side plate 18 from the end of the flap 50 on the side plate 18 side to the intermediate position toward the right side. As the lower end of the flap 50 inclines upward from the intermediate position of the flap 50 further toward the side plate 14, the length of the flap 50 in the vertical direction gradually becomes shorter. The upper end of the flap 50 is maintained at a constant height. The vertical length of the flap 50 on the side plate 18 side is slightly shorter than that of the front plate 16. Over the entire length of the flap 50 in the left-right direction, the length of the flap 50 in the vertical direction is shorter than the distance between the bottom wall 22 and the lid part 12.

A flap 52 is connected to the rear end edge of the side plate 18. The flap 52 is connected to the rear edge of the side plate 18 via a folding line. The flap 52 has a substantially rectangular flat plate shape. The flap 52 is arranged inside the rear plate 15 and along the rear plate 15. In the flap 52, each of the upper and lower edges is parallel to the bottom wall 22. The length of the flap 52 in the vertical direction is slightly shorter than that of the rear plate 15. A flap 60 is connected to the upper edge of the side plate 18. The flap 60 is arranged inside the lid 12 when the lid 12 is closed.

A flap 54 is connected to the front edge of the side plate 14 via a folding line. Flap 54 has a similar shape to flap 50. The flap 54, like the flap 50, is arranged inside the front plate 16 and along the front plate 16. A flap 56 is connected to the rear end edge of the side plate 14 via a folding line. Flap 56 has a similar shape to flap 52. The flap 56, like the flap 52, is arranged inside the rear plate 15 and along the rear plate 15. A flap 62 is connected to the upper edge of the side plate 14. Flap 62 has a similar shape to flap 60. The flap 62 is arranged inside the lid 12 when the lid 12 is closed.

(Socket configuration)
An insertion port 90 is arranged at the boundary between the front plate 16 and the bottom wall 22. The insertion port 90 passes through the lower end of the front plate 16. The length of the insertion port 90 in the vertical direction is longest at the center in the left-right direction, and gradually becomes shorter as it progresses in the left-right direction. Further, the insertion port 90 has a section in which the length of the insertion port 90 in the vertical direction is constant in each of the left and right directions. In the section where the length in the vertical direction is constant, the length in the vertical direction of the insertion port 90 is longer than the thickness of the insertion piece 36, which will be described later. Further, the insertion port 90 has slits each having a vertical length of 0 mm at each of the left and right ends.

A pair of slits 94 are arranged in the bottom wall 22, extending from the left and right ends of the insertion port 90, respectively. The slit 94 is arranged obliquely with respect to the front-rear direction. The bottom wall 22 is crushed to be thinner between the pair of slits 94 by applying a load in the vertical direction with a tool such as a cork. The bottom wall 22 includes rectangular through holes 92 on each of the left and right sides of the pair of slits 94 .

A forehead plate 80 is connected to the upper end of the front plate 16. The forehead plate 80 has a rectangular flat plate shape. The forehead plate 80 is arranged rearward from the upper end of the front plate 16. The forehead plate 80 is connected to the front plate 16 over the entire length of the front plate 16 in the left-right direction.

(Configuration of locking piece)
The inner plate 70 is connected to the rear edge of the frame plate 80. The forehead plate 80 is connected to the inner plate 70 over the entire length of the inner plate 70 in the left-right direction. With this configuration, the strength of the packaging container 10 can be improved compared to a configuration in which the frame plate 80 is shorter than the front plate 16 and the inner plate 70 in the left-right direction.

The inner plate 70 has a flat plate shape. The inner plate 70 is arranged along the inner surfaces of the flaps 50, 52 and the front plate 16 on the inner side (ie, on the rear side) of the flaps 50, 52. The lower edge of the inner plate 70 has an edge 76 located above both left and right ends in the center in the left and right direction. The edge 76 is located above the upper end of the insertion port 90.

A locking piece 72 and a pair of insertion pieces 74 are arranged at the lower edge of the inner plate 70. The locking piece 72 is arranged at the center of the edge 76. The locking piece 72 has a substantially trapezoidal flat plate shape, with the upper end being wider in the left-right direction than the lower end. The locking piece 72 is arranged on an extension of the inner plate 70 from the edge 76 . The locking piece 72 is arranged on the same flat plate as the inner plate 70. The locking piece 72 is disposed inside the packaging container 10 from the insertion opening 90, overlapping a part of the center of the insertion opening 90. Thereby, the locking piece 72 covers a part of the center of the insertion port 90.

The lower end edge of the locking piece 72 is in contact with the bottom wall 22. That is, the locking piece 72 covers the insertion port 90 over the entire length in the vertical direction. In addition, in a modified example, the locking piece 72 does not need to be in contact with the bottom wall 22. In this case, the distance between the lower edge of the locking piece 72 and the bottom wall in the vertical direction may be shorter than the thickness of the insertion piece 36, which will be described later.

The pair of insertion pieces 74 are arranged at the same position as the through hole 92 of the bottom wall 22 in the left-right direction. The insertion piece 74 is inserted into the through hole 92. The insertion piece 74 engages with the bottom wall 22 by coming into contact with the rear edge of the through hole 92 . Thereby, the inner plate 70 can be prevented from jumping upward.

(Configuration of lid)
The lid portion 12 is rotatably connected to the upper end of the rear plate 15 via a folding line. The lid portion 12 has a rectangular flat plate shape. The lid portion 12 closes the opening 17 when placed at a position facing the bottom wall 22 with a gap therebetween. Thereby, a storage space for the packaging container 10 is defined.

A connecting wall 30 is rotatably connected to the end edge of the lid portion 12 opposite to the rear plate 15, that is, the front edge when the lid portion 12 is closed, via a folding line. . In a state in which the lid portion 12 is closed, the connecting wall 30 is arranged along the front plate 16 on the outside of the front plate 16, that is, on the front side. The vertical length of the connecting wall 30 is approximately the same as that of the front plate 16. The lower end edge of the connecting wall 30 slopes upward toward the ends in the left-right direction. Therefore, a portion of the front plate 16 is exposed to the outside from the lower end of the connecting wall 30.

The connecting wall 30 includes a cutout piece 34 at the lower end. Perforations 32 extending in the left-right direction are arranged in the cut-out piece 34 .

An insertion piece 36 is rotatably connected to the lower end of the connecting wall 30 via a folding line. The insertion piece 36 has a base end portion having a narrow length in the left-right direction (hereinafter referred to as "width") on the base end side connected to the connecting wall 30. The width of the base end portion is approximately the same as the width of the insertion port 90 up to a certain length in the vertical direction, and is slightly shorter. The length of the base end portion in the front-rear direction is slightly longer than the thickness of the blank 100. The width of the insertion piece 36 is approximately the same as the width of the insertion opening 90 at the portion adjacent to the distal end side of the proximal end portion of the insertion piece 36 , and the width of the insertion piece 36 is approximately the same as the width of the insertion opening 90 . The width becomes gradually narrower.

The insertion piece 36 is provided with a recess 39 at its tip edge. The recess 39 is arranged at the center of the insertion piece 36 in the left-right direction. In the recess 39 , the leading edge of the insertion piece 36 is recessed toward the base end connected to the connecting wall 30 .

The insertion piece 36 includes a locking through hole 38 on the proximal end side connected to the connecting wall 30. The locking through hole 38 extends from the boundary between the insertion piece 36 and the connecting wall 30 toward the distal end side of the insertion piece 36 . The length of the locking through hole 38 from the base end to the tip, that is, the length in the front-rear direction is slightly longer than the distance from the outer surface of the front plate 16 to the inner surface of the locking piece 72.

As shown in FIG. 4, a portion of the insertion port 90 is covered with a locking piece 72. Therefore, when inserting the insertion piece 36 into the insertion opening 90, the insertion piece 36 comes into contact with the locking piece 72. The insertion piece 36 contacts the locking piece 72 in the recess 39 . For this reason, the insertion piece 36 comes into contact with the locking piece 72 after a portion of the distal end side is inserted into the insertion port 90 . As a result, when the insertion piece 36 is further inserted from the state in which it is in contact with the locking piece 72, the insertion piece 36 is guided to the insertion opening 90. Therefore, when the insertion piece 36 is pushed in, the insertion piece 36 can be prevented from coming off from the insertion opening 90.

When the insertion piece 36 is further inserted from the state where it is in contact with the locking piece 72, the locking piece 72 is pressed rearward. In the packaging container 10, only the storage space is arranged inside the packaging container 10 from the locking piece 72 and the inner plate 70. Therefore, the locking piece 72 and the inner plate 70 can bend inward of the packaging container 10 without being hindered by other members of the packaging container 10. As a result, when the locking piece 72 is pressed rearward by the insertion piece 36, at least one of the locking piece 72 and the inner plate 70 is bent rearward, and the locking piece 72 is displaced upward. Thereby, the tip of the insertion piece 36 is inserted into the inside of the packaging container 10 beyond the locking piece 72. According to this configuration, the locking piece 72 can be displaced without bending the locking piece 72 itself or the boundary between the locking piece 72 and the inner plate 70.

Further, a pair of slits 94 are arranged in the bottom wall 22 behind the insertion port 90. Therefore, the portion of the bottom wall 22 sandwiched between the pair of slits 94 is configured to easily deform in a direction away from the locking piece 72 when the insertion piece 36 is inserted into the insertion opening 90. As a result, when the insertion piece 36 is inserted into the insertion opening 90, the insertion piece 36 can be inserted into the insertion opening 90 without bending the locking piece 72 itself or the boundary between the locking piece 72 and the inner plate 70. 72 and the bottom wall 22.

As shown in FIGS. 5 and 6, the insertion piece 36 is inserted until the connecting wall 30 comes into contact with the front plate 16. Thereby, one edge of the locking through-hole 38 is inserted into the inside of the packaging container 10 beyond the locking piece 72. As a result, the deflection of at least one of the locking piece 72 and the inner plate 70 is restored, and the locking piece 72 is inserted into the locking through hole 38. The locking piece 72 engages with one edge of the locking through hole 38 . Thereby, the packaging container 10 is sealed. According to this configuration, the packaging container 10 can be sealed without using adhesives, tapes, or the like.

Further, the locking piece 72 is in contact with the bottom wall 22. That is, the lower end edge of the locking piece 72 is located at the same position as the lower end of the insertion port 90 in the vertical direction, and does not exceed the lower end of the insertion port 90. According to this configuration, compared to a configuration in which the lower edge of the locking piece 72 is located below the lower end of the insertion port 90, when the tip of the insertion piece 36 passes through the locking piece 72, The amount of displacement of the locking piece 72 can be suppressed. As a result, the locking piece 72 can be displaced without bending the locking piece 72 itself or the boundary between the locking piece 72 and the inner plate 70.

The locking piece 72 is arranged on the same flat plate as the inner plate 70. According to this configuration, by making the length of the locking through hole 38 from the base end to the tip slightly longer than the distance from the outer surface of the front plate 16 to the inner surface of the locking piece 72, the locking piece 72 and The insert pieces 36 can be engaged with each other. Therefore, compared to a configuration in which the locking piece 72 is arranged so as to be inclined rearward, it is possible to suppress the length of the locking through-hole 38 from becoming longer from the proximal end to the distal end. This eliminates the need to extend the locking piece 72 to match the length of the locking through hole 38.

When assembling the packaging container 10 from the blank 100 shown in FIG. and the flaps 54, 56 are rotated until they are vertically positioned with respect to the side plates 14. The lower edges of the flaps 50 and 52 are arranged on an extension of the lower edge of the side plate 18 (that is, the boundary between the bottom wall 22 and the side plate 18). When the flaps 50 and 52 are rotated relative to the side plate 18 while rotating the side plate 18 relative to the bottom wall 22, the flap 50 does not need to come into contact with the front plate 16 in the unfolded state. Moreover, it is not necessary to bend the flaps 50, 52 in advance to avoid contact. Similarly, the flap 52 does not need to come into contact with the rear plate 15 in the unfolded state. The same applies to the flaps 54 and 56. Thereby, the packaging container 10 can be assembled quickly.

When opening the sealed packaging container 10, the cutout piece 34 is broken along the perforation. As a result, once the sealed packaging container 10 is opened, it cannot be put back into its original state. Therefore, it is possible to prevent the packaging container 10 from being opened by a third party not intended by the user.

(Second example)
Points different from the first embodiment will be explained. As shown in FIG. 7, the packaging container 10 of this example is assembled by folding a blank 200. As shown in FIG. In the packaging container 10 of this embodiment, the configurations of the insertion opening 290, the through-hole 292, and the locking through-hole 238 are different from the configurations of the insertion opening 90, the through-hole 92, and the locking through-hole 38.

The insertion port 290 is formed by a slit. That is, the length of the insertion port 290 in the vertical direction is 0 mm. In addition, in a modified example, the vertical length of the insertion port 290 may be 0 mm or more and smaller than the thickness of the insertion piece 36.

The through hole 292 is formed by a slit. That is, the length of the through hole 292 in the vertical direction is 0 mm. In addition, in a modified example, the length of the through-hole 292 in the vertical direction may be 0 mm or more, and may be smaller than the thickness of the insertion piece 74.

The locking through hole 238 is formed by a slit. That is, the length of the locking through hole 238 in the front-rear direction is 0 mm. In addition, in a modified example, the length of the locking through-hole 238 in the front-rear direction may be 0 mm or more.

(Third example)
(Configuration of packaging container 310)
Next, a packaging container 310 according to a third embodiment will be described with reference to FIGS. 8 and 9. The packaging container 310 has a rectangular parallelepiped shape including an outer wall portion 311 and a lid portion 312. The packaging container 310 is assembled by folding a single flat plate blank 300. In addition, in FIG. 8, the broken line represents a folding line. The outer wall portion 311 includes a front plate 316, left and right side plates 318, 314, and a rear plate 315 that constitute side walls, and a bottom wall 322. The bottom wall 322 has a rectangular flat plate shape. Each of the plates 314, 315, 316, and 318 has a rectangular flat plate shape. Each of the plates 314, 315, 316, and 318 is connected to the outer periphery of the four sides of the bottom wall 322 via folded lines, extends vertically upward from the outer periphery, and defines an opening at the upper end.

Approximately rectangular flat plate-shaped flaps 350 and 352 are connected to the front and rear edges of the side plate 318, respectively. Similarly, substantially rectangular flat plate-shaped flaps 354 and 356 are connected to the front and rear edges of the side plate 314, respectively. The flaps 350 , 354 are arranged along the front plate 316 on the inside of the front plate 316 . The flaps 352 , 356 are arranged along the rear plate 315 on the inside of the rear plate 315 .

A flap 360 is connected to the upper edge of the side plate 318. The flap 360 is located inside the lid 312 when the lid 312 is closed. An insertion port 396 is arranged between the flap 360 and the side plate 318. The insertion port 396 has a slit shape. A flap 362 is connected to the upper edge of the side plate 314. The flap 362 is located inside the lid 312 when the lid 312 is closed. An insertion port 396 is arranged between the flap 362 and the side plate 314 in the same way as between the flap 360 and the side plate 318.

A flap 378 is connected to the upper edge of the front plate 316. The flap 378 is rotatably connected to the front plate 316 using the upper edge of the front plate 316 as a folding line. The flap 378 has a flat plate shape. The flap 378 is arranged with respect to the front plate 316 so as to be bent perpendicularly toward the rear at the boundary with the front plate 316.

(Configuration of insertion port 390)
At the boundary between the front plate 316 and the flap 378, an insertion port 390 is arranged at the center in the left-right direction. The insertion port 390 passes through the boundary between the front plate 316 and the flap 378. Like the insertion port 290, the insertion port 390 has a slit shape.

The boundary between the front plate 316 and the flap 378 is further provided with a pair of through holes 392 on both sides of the insertion hole 390. Each of the pair of through holes 392 has a slit shape.

(Configuration of locking piece 372)
An inner side plate 370, a pair of insertion pieces 382, and a pair of locking pieces 398 are connected to the flap 378. Equipped with A pair of insertion pieces 382 are arranged on each of the left and right end pieces of the flap 378. Each of the pair of insertion pieces 382 is bent perpendicularly to the flap 378 and inserted into the left and right insertion ports 396, respectively. Each of the pair of locking pieces 398 protrudes from both left and right sides of the flap 378 when the insertion port 396 is inserted into the insertion piece 382.

The inner plate 370 is connected to the flap 378 via a folding line at the center of the flap 378 in the left-right direction. The inner plate 370 is bent so as to face the lower surface of the flap 378, that is, the surface facing the accommodation space. A locking piece 372 and a pair of insertion pieces 374 are arranged on the edge of the inner plate 370 opposite to the edge connected to the flap 378. The locking piece 372 is arranged at the center of the inner plate 370. The locking piece 372 has a flat plate shape. The locking piece 372 is arranged on the same flat plate as the inner plate 370 and on an extension of the inner plate 370. The locking piece 372 is disposed inside the packaging container 310 from the insertion opening 390, overlapping a part of the center of the insertion opening 390. Thereby, the locking piece 372 covers a part of the center of the insertion port 390.

The locking piece 372 is in contact with the front plate 316 at the front end edge. The pair of insertion pieces 374 are arranged at the same position as the through hole 392 in the left-right direction. The insertion piece 374 is inserted into the through hole 392. The insertion piece 374 engages the front plate 316 by abutting the front plate 316. This maintains the inner plate 370 in a position opposite the flap 378.

A lid portion 312 is rotatably connected to the upper end of the rear plate 315 via a folding line. The lid portion 312 has a rectangular flat plate shape. The lid portion 312 is disposed at a position facing the bottom wall 322 with a gap therebetween, and the packaging container 310 is closed.

An insertion piece 336 is rotatably connected to the end edge of the lid portion 312 opposite to the rear plate 315, that is, the front edge, via a folding line. The insertion piece 336 has a similar shape to the insertion piece 36. The insertion piece 336 includes a locking through hole 338 on the base end side connected to the lid part 312. The locking through hole 338 has a similar shape to the locking through hole 238.

An insertion piece 394 is arranged on each of the left and right edges of the lid portion 312. The insertion piece 394 has a similar configuration to the insertion piece 336. The insertion piece 394 has a locking through hole 395 on the base end side connected to the lid part 312. The locking through hole 395 has a rectangular opening that passes through the insertion piece 394.

When closing the lid part 312, from the state shown in FIG. Insert.

When the insertion piece 336 is further inserted from the state in which it is in contact with the locking piece 372, the locking piece 372 is pressed downward. At this time, the locking piece 372 and the inner plate 370 can bend inward of the packaging container 310 without being hindered by other members of the packaging container 310. According to this configuration, the locking piece 372 can be displaced without bending the locking piece 372 itself or the boundary between the locking piece 372 and the inner plate 370.

The insertion piece 336 is inserted until the lid portion 312 comes into contact with the flap 378. Thereby, the locking through hole 338 is inserted up to the locking piece 372. As a result, the deflection of at least one of the locking piece 372 and the inner plate 370 is restored, and the locking piece 372 is inserted into the locking through hole 338 and engaged with the insertion piece 336. Thereby, like the packaging container 10, the packaging container 310 is sealed. Further, when the insertion piece 394 is inserted into the insertion port 396, the locking through hole 395 is inserted into the locking piece 398, and the insertion piece 394 is locked with the locking piece 398.

When opening the sealed packaging container 310, a finger is inserted into a finger insertion opening 334 arranged in the rear plate 315 to break the perforation 332 arranged in the lid part 312. Thereby, the packaging container 310 can be opened while the insertion pieces 336 and 394 are inserted into the insertion ports 390 and 396, respectively.

(Fourth example)
(Configuration of packaging container 410)
Next, a packaging container 410 according to a fourth embodiment will be described with reference to FIGS. 10 and 11. The packaging container 410 has a rectangular parallelepiped shape including an outer wall portion 411 and a lid portion 412. The packaging container 410 is assembled by folding a single flat plate blank 400. In addition, in FIG. 10, a broken line represents a folding line. The outer wall portion 411 includes a front plate 416, left and right side plates 418, 414, and a rear plate 415 that constitute side walls, and a bottom wall 422. Each of the plates 414, 415, 416, 418 and the bottom wall 422 has a similar configuration to each of the plates 314, 315, 316, 318 and the bottom wall 322, respectively.

Flaps 460 and 462 are connected to the upper edges of the side plates 418 and 414, respectively. Flaps 460, 462 are positioned inside lid 412 when lid 412 is closed.

Flat plate-shaped flaps 450 and 452 are connected to the left and right edges of the front plate 416, respectively. Each of the flaps 450, 452 is adhered to the inside of the side panels 418, 414. Flat plate-shaped flaps 454 and 456 are connected to the left and right edges of the rear plate 415, respectively. Each of the flaps 454, 456 is adhered to the inside of the side panels 418, 414.

A flap 478 is connected to the upper edge of the front plate 416. The flap 478 is rotatably connected to the front plate 416 using the upper edge of the front plate 416 as a folding line. The flap 478 has a flat plate shape. The flap 478 is arranged with respect to the front plate 416 by being bent perpendicularly toward the rear at the boundary with the front plate 416.

(Configuration of insertion port 490)
At the boundary between the front plate 416 and the flap 478, an insertion port 490 is arranged at the center in the left-right direction. The insertion port 490 has a similar configuration to the insertion port 390.

(Configuration of locking piece 472)
An inner plate 482 is connected to the flap 478 . Inner plate 482 is connected to flap 478 via a folding line. The inner plate 482 is partially adhered to the lower surface of the flap 478, that is, the surface facing the accommodation space. A locking piece 472 is arranged on the edge of the inner plate 482 opposite to the edge connected to the flap 478. The locking piece 472 is arranged at the center of the inner plate 482. The locking piece 472 has a flat plate shape. The locking piece 472 is arranged on the same flat plate as the inner plate 482 and on an extension of the inner plate 482. The locking piece 472 is disposed inside the packaging container 410 from the insertion opening 490, overlapping a part of the center of the insertion opening 490. Thereby, the locking piece 472 covers a part of the center of the insertion port 490. The locking piece 472 is in contact with the front plate 416 at the front end edge.

A lid portion 412 similar to the lid portion 312 is rotatably connected to the upper end of the rear plate 415 via a folding line. An insertion piece 436 is rotatably connected to the end edge of the lid portion 412 opposite to the rear plate 415, that is, the front edge, via a folding line. The insertion piece 436 has a similar shape to the insertion piece 336. The insertion piece 436 includes a locking through hole 438 similar to the locking through hole 338 .

A folding piece 413 is arranged on each of the left and right edges of the lid part 412. The folded piece 413 is folded back with respect to the lid part 412 at the boundary with the lid part 412, and is bonded to the lower surface of the lid part 412.

When closing the lid portion 412, the insertion piece 436 is inserted into the insertion opening 490 from the state shown in FIG. The insertion piece 436 is further inserted from the state where it is in contact with the locking piece 472. As a result, similarly to the third embodiment, the locking piece 472 is inserted into the locking through hole 438 and engaged with the insertion piece 436. Thereby, like the packaging container 10, the packaging container 410 is sealed.

When opening the sealed packaging container 410, a finger is inserted into a finger insertion opening 434 arranged in the rear plate 415, and the perforations 432 arranged in the lid part 412 and the folded piece 413 are broken. Thereby, the packaging container 410 can be opened while the insertion piece 436 is inserted into the insertion port 490.

Although the embodiments of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The techniques described in the claims include various modifications and changes to the specific examples illustrated above.

(Modification 1) In the first embodiment, the outer wall portion 11 and the lid portion 12 are integrally manufactured from one blank 100. However, the outer wall portion 11 and the lid portion 12 may be separately manufactured from separate blanks. Moreover, each of the outer wall part 11 and the lid part 12 may be manufactured by assembling a plurality of parts manufactured from a plurality of blanks. The same applies to the second to fourth embodiments.

(Modification 2) In the first embodiment, the insertion port 90 is arranged at the boundary between the front plate 16 and the bottom wall 22. However, the insertion port 90 may be arranged at an intermediate position of the front plate 16 or at an intermediate position of the bottom wall 22.

(Modification 3) In the first embodiment, the insertion port 90 is arranged at the boundary between the front plate 16 and the bottom wall 22. However, in addition to or in place of this configuration, the insertion port may be located at the boundary between either one of the side plates 14, 18 and the bottom wall 22. In this case, the insertion pieces may be connected via connecting walls on the left and right edges of the lid portion 12. Further, the inner plate and the locking piece may be connected to the upper edges of the side plates 14, 18 where the insertion ports are arranged.

Further, the technical elements described in this specification or the drawings exhibit technical usefulness singly or in various combinations, and are not limited to the combinations described in the claims as filed. Furthermore, the techniques illustrated in this specification or the drawings simultaneously achieve multiple objectives, and achieving one of the objectives has technical utility in itself.

10: Packaging container 11: Outer wall 12: Lid 13: Side wall 22: Bottom wall 30: Connecting wall 36: Insertion piece 38: Locking through hole 50, 54: Flap 70: Inner plate 72: Locking piece 80: Plaque 100: Blank

Claims (7)

an outer wall having an opening;
a lid portion that covers the opening;
an insertion piece connected to the lid;
an insertion port penetrating the outer wall portion and receiving the insertion piece;
an inner plate disposed along the inner surface of the outer wall;
a locking piece disposed on an extension of the inner plate and covering a part of the insertion port inside the outer wall portion;
A packaging container comprising: a locking penetration part that penetrates the insertion piece and receives the locking piece. The packaging container according to claim 1, wherein an edge of the locking piece opposite to the inner plate is located at a position that does not extend beyond the end of the insertion port opposite to the opening. The outer wall portion is
an opposing wall that faces the lid portion with a gap therebetween;
A side wall surrounding a housing space for the packaging container between the lid portion and the opposing wall,
The insertion piece is connected to the lid part through a connecting wall extending along the side wall at an outer side of the packaging container than the side wall,
The insertion port is located at a boundary between the opposing wall and the side wall,
In the direction in which the lid portion and the opposing wall face each other, the distance between the end edge of the locking piece opposite to the inner plate and the opposing wall is equal to the distance in the direction in which the lid portion and the opposing wall face each other. The packaging container according to claim 1 or 2, which is shorter than the length of the insertion piece. The inner plate and the side wall are connected to each other via a frame plate at their edges on the lid side,
The packaging container according to claim 3, wherein the frame plate is connected to each of the inner plate and the side wall over the entire length of each of the inner plate and the side wall. The inner plate and the side wall are connected to each other via a frame plate at their edges on the lid side,
The length of the locking penetration portion in the direction in which the inner plate and the side wall face each other is approximately the same as the distance from the outer surface of the side wall to the inner surface of the locking piece. packaging container. The packaging container is assembled by folding a single blank,
The side wall includes a flat first side plate disposed between the inner side plate and the connecting wall, and a pair of second side plates adjacent to the first side plate,
Each of the pair of second side plates includes a flap extending from an edge on the first side plate between the first side plate and the inner side plate,
The edge of the flap on the opposing wall side is not disposed on the opposing wall side beyond the edge of the first side plate on the opposing wall side. packaging container. The insertion piece is connected to the lid at a position opposite to the side connected to the lid at a position where the insertion piece contacts the locking piece when inserted into the insertion opening. The packaging container according to any one of claims 1 to 6, having a recess that is recessed toward the side end.

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