JP6744189B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box formed by punching and assembling one plate-shaped member into a predetermined shape, and more specifically, a packaging box that can accommodate a pack of fruits or fresh vegetables and can be stacked in multiple stages. Regarding the box.

BACKGROUND ART Conventionally, there is a packaging box for accommodating a pack of fruits, fresh vegetables or the like and stacking it in multiple stages, which is formed by punching out one plate-shaped member into a predetermined shape and bending it along a fold. , A square bottom plate, a front plate, a rear plate, a left side plate, a right side plate which are integrally provided on four sides of the bottom plate through folds, and top edge pieces provided at the upper portions of the four corners, and the contents are removed from the outside. In addition to the above, there is one in which the contents are protected by the top edge piece so as not to be damaged when the packaging boxes are stacked in multiple stages (for example, refer to Patent Document 1).

JP-A-2005-170479

However, in the above-mentioned Patent Document 1, since the top edge piece covers a part of the pack of the stored fruits, fresh vegetables and the like, it is difficult to take out the pack stored at the time of display.

Therefore, an object of the present invention is to provide a packaging box in which the contained items can be stacked in multiple stages without being damaged and the contained items can be taken out well.

In order to achieve the above object, the packaging box of the present invention includes a rectangular bottom plate, a front side plate, a rear side plate, a left side plate, a right side plate integrally provided on four sides of the bottom plate through folds, and the front side plate. And a left front connecting piece that connects the left side plate, a right front connecting piece that connects the front side plate and the right side plate, a left rear side connecting piece that connects the rear side plate and the left side plate, and A right rear side connecting piece that connects the rear side plate and the right side plate, a left top plate integrally provided at the left end portion of the left side plate through a fold, and a right end portion of the right side plate through the fold In a packaging box formed by assembling a plate-shaped member having a right top plate provided in, the left top plate is bendable to both the inner surface side and the outer surface side of the left side plate through a fold. The right top plate is formed with a pair of locking pieces that are formed at both ends in the front-rear direction and project in the front-rear direction and that can be bent on both the inner surface side and the outer surface side of the left top plate through folds. Is formed to be bendable on both the inner surface side and the outer surface side of the right side plate through a fold, and protrudes in the front-rear direction at both ends in the front-rear direction, and the right top plate is formed through the fold. A pair of bendable locking pieces on both the inner surface side and the outer surface side of the front plate, and locking holes for locking the locking pieces are formed in the upper edges of the front plate and the rear plate, respectively. And forming a step in each of the locking pieces and providing a cut line for passing the step in the locking hole, the left front connecting piece and the left rear connecting piece are folds. Are integrally provided on both ends of the left side plate in the front-rear direction, and the right front side connecting piece and the right rear side connecting piece are respectively formed on both ends of the right side plate in the front-rear direction via folds. Provided integrally, between the front side plate and the left front side connecting piece, between the front side plate and the right front side connecting piece, between the rear side plate and the left rear side connecting piece, the rear side plate and the Insertion parts for inserting and locking the locking pieces are respectively formed between the right rear connecting piece and the left top plate and the right top plate, and the left side plate and the right side plate through folds. And each of the locking pieces is bent to the inner surface side of the left top plate and the right top plate through a fold, and each of the locking pieces is connected to each of the locking holes. And the left top plate and the right top plate are respectively bent to the outer surfaces of the left side plate and the right side plate through folds, and the locking pieces are folded. The left top plate and the right top plate may be bent through the eyes to the outer surface sides of the left top plate and the respective locking pieces to be inserted into the respective insertion portions, and the contents can be recombined. It has a feature.

Further, it is preferable to put a lead ruled line or a reverse ruled line in the fold provided between the left side plate and the left top plate and the fold provided between the right side plate and the right top plate, and further, It is preferable that a pair of locking projections that serve as a guide and a locking portion when the locking piece is inserted into the insertion portion are formed on the upper portion and the lower portion of the insertion portion.

According to the packaging box of the present invention, after accommodating the contents, the left top plate and the right top plate are bent toward the inner surfaces of the left side plate and the right side plate through the folds, and the respective locking pieces are locked in the locking holes. The left top plate and the right top plate can be arranged on the upper part of the contained items by locking to the above, and there is no risk of damaging the contained items even if the packaging boxes are stacked in multiple stages. Further, when taking out the contents, the left top plate and the right top plate are bent to the outer surfaces of the left side plate and the right side plate through the folds, and the respective locking pieces are inserted into the respective insertion portions. By locking, the whole upper part of the packaging box can be opened widely, and the contained items can be taken out satisfactorily.

In addition, by inserting a lead ruled line or a reverse ruled line in the fold provided between the left side plate and the left top plate and the fold provided between the right side plate and the right top plate, Thus, the left top plate and the right top plate can be favorably bent on both the inner surface side and the outer surface side of the left side plate and the right side plate. Furthermore, by forming a locking projection on the lower part of the insertion part, which serves as a guide and a locking part when inserting the locking piece into the insertion part, the locking piece can be easily inserted into the insertion part, ensuring It can be locked.

It is a development view of the packaging box which shows the example of the 1st form of the present invention. Similarly, it is a perspective view of the packaging box which shows the state which partially bent. Similarly, it is a perspective view of a state in which the locking pieces of the left top plate and the right top plate are locked in the locking holes. Similarly, it is a perspective view of the packaging box in which the locking pieces of the left top plate and the right top plate are locked in the locking holes. FIG. 5 is a side view of the main parts of the packaging box in which the locking pieces of the left top plate and the right top plate are also locked in the locking holes. Similarly, it is explanatory drawing when inserting the locking piece of a left top plate and a right top plate into an insertion part. Similarly, it is a perspective view of the packaging box in which the locking pieces of the left top plate and the right top plate are inserted into the insertion part. FIG. 7 is a side view of the main part of the packaging box in which the locking pieces of the left top plate and the right top plate are also inserted into the insertion portion. It is a development view of the packaging box which shows the example of the 2nd form of the present invention. Similarly, it is a perspective view of the packaging box which shows the state which partially bent.

1 to 8 show a first embodiment in which the packaging box of the present invention is applied to, for example, a packaging box that stores four packs of strawberries in vertical and horizontal rows, and the packaging box 1 is a plate made of a corrugated cardboard sheet. It is formed by punching and assembling the strip-shaped member 2 as shown in the development view of FIG. In FIG. 1, the plate-shaped member 2 is in a state in which the front side surface of the packaging box 1 is downward, the rear side surface is upward, the left side surface is the left side, and the right side surface is the right side. In the following description, the up-down direction of FIG. 1 will be referred to as the front-back direction of the packaging box 1, and the left-right direction of FIG. 1 will be referred to as the left-right direction of the packaging box 1.

The plate member 2 includes a rectangular bottom plate 3, a front side plate 4 and a rear side plate 5, which are integrally provided on a pair of long sides of the bottom plate 3 via folds A1 and A2, respectively, and a pair of short sides of the bottom plate 3. The left side plate 6 and the right side plate 7 integrally provided on the front side and the rear side of the left side plate 6 via the folds A3 and A4, respectively, and the left front side connecting piece 8 provided integrally on the front side and the rear side of the left side plate 6 through the folds A5 and A6, respectively. And the left rear side connecting piece 9, the right front side connecting piece 10 and the right rear side connecting piece 11, which are integrally provided on the front side and the rear side of the right side plate 7 through folds A7 and A8, respectively, the left side plate 6 and the right side. A left top plate 12 and a right top plate 13 that are integrally provided at the outer edges of the plate 7 in the left-right direction via folds A9 and A10 are provided.

The front side plate 4 is integrally formed with the front side outer plate 4a which is continuously formed on the bottom plate 3 through the fold A1 and the outer edge portion of the front side outer plate 4a facing the fold A1 through the fold A11. A front inner plate 4b formed integrally with the front upper plate 4b and a front inner plate 4c integrally formed on the outer edge portion of the front upper plate 4b facing the fold A11 via a fold A12. A first left side inner plate half body 14 and a first right side inner plate half body 15 are integrally provided at both left and right ends of 4c via folds A13 and A14. Further, partition plates 16 and 16 are detachably provided at both left and right ends of the first left inner plate half body 14 and the first right inner plate half body 15 through cut lines B1 and B2, respectively. Slits 16a are formed in the central portions of the side edges of the bottom plate 16 respectively.

The rear side plate 5 has a rear side plate 5a continuously formed on the bottom plate 3 via the fold line A2 and an outer edge portion of the rear side plate 5a facing the fold line A2 and a fold line A15. A rear upper edge plate 5b integrally formed with the rear upper edge plate 5b, and a rear inner plate 5c integrally formed at an outer edge portion of the rear upper edge plate 5b facing the fold line A15 via a fold line A16. The second left inner plate half body 17 and the second right inner plate half body 18 are integrally provided at both left and right ends of the rear inner plate 5c via folds A17 and A18.

The left side plate 6 has a fold A5 to which the left front side connecting piece 8 is connected, which is formed inside the plate-shaped member 2 more than a fold A1 to which the front outer plate 4a of the bottom plate 3 is connected, and the left rear side. A fold A6 to which the connecting piece 9 is connected is formed inside the plate member 2 more than a fold A2 to which the rear outer plate 5a of the bottom plate 3 is connected, and the folds A5 to A6 of the left side plate 6 are formed. Is shorter than the length dimension from the fold A1 to the fold A2 of the bottom plate 3.

The right side plate 7 has a fold A7 to which the right front connecting piece 10 is connected, which is formed inside the plate-like member 2 more than a fold A1 to which the front outer plate 4a of the bottom plate 3 is connected. A fold A8 to which the connecting piece 11 is connected is formed inside the plate member 2 more than a fold A2 to which the rear outer plate 5a of the bottom plate 3 is connected, and the folds A7 to A8 of the right side plate 7 are formed. Is shorter than the length dimension from the fold A1 to the fold A2 of the bottom plate 3.

Lead creases or reverse creases are provided in the folds A9 and A10 provided between the left top plate 12 and the right top plate 13 and the left side plate 6 and the right side plate 7, and the left top plate 12 and the right top plate 13 are The left side plate 6 and the right side plate 7 are formed to be bendable toward the inner surface side and the outer surface side, respectively. Further, a pair of locking pieces 12a, 12a protruding in the front-rear direction via folds A19, A19 are provided at both end portions of the left top plate 12 in the front-rear direction, and folds are formed at both end portions of the right top plate 13 in the front-rear direction. A pair of locking pieces 13a, 13a protruding in the front-rear direction are formed via A20, A20, respectively. It is formed so that it can be bent toward the side and the outer surface side, respectively. Each locking piece 12a, 13a is formed in a substantially wedge shape in which the width gradually narrows from the base end side toward the tip side, the outer surface is formed by an arm curved surface, and the base end of each locking piece 12a, 13a is formed. The part protrudes more outward than the left top plate 12 or the right top plate 13, and is between the base end of each locking piece 12a and the left top plate 12, and between the base end of each locking piece 13a and the right top plate 13. Steps 12b and 13b are formed in each of them.

In the front upper edge plate 4b and the rear upper edge plate 5b, the left top plate 12 and the right top plate 13 are bent from the folds A9, A10 toward the inner surface side of the left side plate 6 or the right side plate 7, and A rectangular locking hole 19 into which the locking pieces 12a, 13a are inserted when the locking pieces 12a, 13a are bent from the folds A19, A20 toward the inner surface of the left top plate 12 or the right top plate 13, respectively. Are drilled respectively. Further, each locking hole 19 is provided with a cut line 19a through which the step portions 12b and 13b of the locking pieces 12a and 13a pass.

Further, notches 20 and 20 are respectively formed in the central portions of the folds A1 and A2 which are long sides of the bottom plate 3, and a protrusion 4d which is inserted into the notch 20 is formed in the central portion of the front inner plate 4c. However, the protrusions 5d to be inserted into the notches 20 are provided in the central portion of the rear inner plate 5c. Further, a cut-and-raised line for forming a protruding piece 4e protruding upward when the front inner plate 4c is folded on the inner surface side of the front outer plate 4a is formed in the central portion of the front upper edge plate 4b. Cut-and-raised lines are provided at the central portion of the edge plate 5b for forming a projecting piece 5e protruding upward when the rear inner plate 5c is folded on the inner surface side of the rear outer plate 5a.

The left front connecting piece 8 and the left rear connecting piece 9 are formed in a U shape having concave portions 8a and 9a that are open at the left end portion, and the left front connecting piece 8 and the left rear connecting piece 9 are provided on the left and right sides. The length in the direction is formed by subtracting the thickness of the plate member 2 from the length in the front-rear direction of the front outer plate 4a or the rear outer plate 5a. Further, a pair of locking projections 6a, 6a projecting from the left side plate 6 toward the left front side connecting piece is formed at an intermediate position of the fold A5 between the left front side connecting piece 8 and the left side plate 6. The cut-and-raised lines are formed with a predetermined interval, and similarly at the intermediate position of the fold A6 between the left rear side connecting piece 9 and the left side plate 6, similarly, the left side connecting plate 9 is connected to the left rear side connecting piece. Cut-and-raised lines for forming a pair of locking projections 6b, 6b projecting in the direction are formed with a predetermined interval.

Like the left front side connecting piece 8 and the left rear side connecting piece 9, the right front side connecting piece 10 and the right rear side connecting piece 11 are formed in a U shape having recesses 10a and 11a opening at the right end. The right-left side connecting piece 10 and the right-side rear connecting piece 11 have the left-right direction length dimension determined from the front-rear direction length dimension of the front outer plate 4a or the rear outer plate 5a, respectively. It is formed to the size minus the size. Further, a pair of locking projections 7a, 7a projecting from the right side plate 7 toward the right front side connecting piece is formed at an intermediate position of the fold A7 between the right front side connecting piece 10 and the right side plate 7. The cut-and-raised lines are formed with a predetermined spacing, and similarly at the intermediate position of the fold A8 between the right rear side connecting piece 11 and the right side plate 7, the right side plate 7 and the right rear side connecting piece are also similarly formed. Cut-and-raised lines for forming a pair of locking projections 7b, 7b projecting in the direction are formed at a predetermined interval. The left and right connecting pieces 8, the left rear connecting piece 9, the right front connecting piece 10, and the right rear connecting piece 11 have right-and-left length dimensions set as appropriate depending on the strength and thickness of the plate member 2. However, the dimensions are not limited to the above.

Next, a procedure for forming the packaging box 1 by bending the plate member 2 described above will be described.

First, the partition plate 16 is separated from the first left inner plate half body 14 and the first right inner plate half body 15 through the cut lines B1 and B2, respectively. Then, the left side plate 6 is raised from the bottom plate 3 via the fold line A3, the left front side connecting piece 8 is moved toward the fold line A1 via the fold line A5, and the left rear side connecting piece 9 is passed through the fold line A6. The right side plate 7 is erected from the bottom plate 3 via the fold line A4 while bending in the fold line A2 direction, and the right front side connecting piece 10 is moved toward the fold line A1 direction via the fold line A7 and the right rear side connecting piece. 11 is bent in the direction of fold A2 through fold A8.

The front outer plate 4a is raised along the fold line A1, the front upper edge plate 4b is bent along the fold line A11 in parallel with the bottom plate 3, and then the front inner plate 4c is folded inside along the fold line A12. That is, it is folded to the bottom plate 3 side. While sandwiching the left front connecting piece 8 and the right front connecting piece 10 between the front inner plate 4c and the front outer plate 4a, the front inner plate 4c is overlaid inside the front outer plate 4a, and the protrusion 4d is cut out 20 And fix it. Further, the first left inner plate half body 14 is bent in the direction of the fold A3 through the fold A13 and is arranged inside the left side plate 6, and the first right inner plate half is laid through the fold A14. The body 15 is bent in the direction of the fold line A4 and placed inside the right side plate 7.

Similar to the front plate 4, the rear outer plate 5a is raised from the bottom plate 3 along the fold line A2, the rear upper edge plate 5b is bent along the fold line A15 in parallel with the bottom plate 3, and then the rear plate The side inner plate 5c is folded inward along the fold line A16. While sandwiching the left rear connecting piece 9 and the right rear connecting piece 11 between the rear inner plate 5c and the rear outer plate 5a, the rear inner plate 5c is overlaid inside the rear outer plate 5a to project. The portion 5d is engaged with the notch 20 and fixed. Further, the second left inner plate half body 17 is bent in the direction of the fold A3 through the fold A17 to be arranged inside the left side plate 6, and the second right inner plate half is laid through the fold A18. The body 18 is bent in the direction of the fold line A4 and placed inside the right side plate 7.

Next, the left top plate 12 is bent from the fold A9 toward the inner surface of the left side plate 6 by approximately 90° so as to be parallel to the bottom plate 3, and the locking pieces 12a, 12a are laid through the folds A19, A19. 90 degrees toward the inner surface of the left top plate 12 and locked in the locking holes 19 and 19. Similarly, the right top plate 13 is bent from the fold A10 toward the inner surface side of the right side plate 7 by approximately 90° so as to be parallel to the bottom plate 3, and the locking pieces 13a, 13a are folded through the folds A20, A20. The right top plate 13 is bent toward the inner surface side by 90° and locked in the locking holes 19, 19.

The slits 16a, 16a of the partition plates 16, 16 are fitted to each other, combined in a cross shape, and arranged in the center of the bottom plate 3.

In the packaging box 1 thus folded, the front side plate 4 and the rear side plate 5 are erected on the bottom plate 3 by engaging the protrusions 4d and 5d with the notches 20 and 20, respectively. The left front connecting piece 8 and the right front connecting piece 10 can be securely held, and are sandwiched between the front outer plate 4a and the front inner plate 4c, and further the left rear connecting piece 9 and the right rear connecting Since the piece 11 is sandwiched between the rear outer plate 5a and the rear inner plate 5c, the left side plate 6 and the right side plate 7 can be surely held in a state of being erected from the bottom plate 3.

Further, the fold A5 connecting the left side plate 6 and the left front side connecting piece 8 is formed inside the plate-like member 2 more than the fold A1 to which the front side outer plate 4a of the bottom plate 3 is connected. The fold A6 connecting the left rear side connecting piece 9 is formed inside the plate member 2 more than the fold 2A to which the rear outer plate 5a of the bottom plate 3 is connected, and the right side plate 7 and the right front side are formed. The fold A7 connecting the connecting piece 10 is formed inside the plate member 2 more than the fold A1 to which the front outer plate 4a of the bottom plate 3 is connected, and connects the right side plate 7 and the right rear side connecting piece 11 together. Since the fold A8 to be connected is formed inside the plate-shaped member 2 more than the fold A2 to which the rear side outer plate 5a of the bottom plate 3 is connected, the left front connecting piece 8 and the right front connecting piece 10 are connected to each other. Gaps are formed between the front outer plate 4a and between the left rear connecting piece 9 and the right rear connecting piece 11 and the rear outer plate 5a, respectively. Further, a pair of locking protrusions 6a, 6b, 7a, 7b are arranged above and below the respective gaps, and between the pair of locking protrusions 6a, 6a and between the locking protrusions 6b, 6b. The space formed between the locking projections 7a and 7a and between the locking projections 7b and 7b serves as an insertion portion 21 into which the locking pieces 12a and 13a are inserted. Further, the projecting pieces 4e, 5e project upward from the front upper edge plate 4b and the rear upper edge plate 5b, respectively.

When accommodating four strawberry packs in the packaging box 1 described above, as shown in FIGS. 3 to 5, the front plate 4, the rear plate 5, and the left plate around the bottom plate 3 as described above. 6. After the right side plate 7 is erected, the partition plates 16 and 16 combined in a cross shape are arranged in the center of the bottom plate 3, and one strawberry pack is accommodated in each of the four divided spaces. Next, the left top plate 12 is bent from the fold A9 toward the inner surface side of the left side plate 6 by approximately 90° so as to be parallel to the bottom plate 3, and the locking pieces 12a, 12a are folded through the folds A19, A19. The left top plate 12 is bent toward the inner surface side by 90° and inserted into the locking holes 19, 19. Similarly, the right top plate 13 is bent from the fold A10 toward the inner surface side of the right side plate 7 by approximately 90° so as to be parallel to the bottom plate 3, and the locking pieces 13a, 13a are folded through the folds A20, A20. The right top plate 13 is bent 90° toward the inner surface side and inserted into the locking holes 19, 19. At this time, the recesses 8a, 9a, 10a, 11a serve as relief portions when the locking pieces 12a, 13a are inserted into the locking holes 19, and the locking pieces 12a, 13a are stepped portions 12b, 13b. Respectively pass through the cut lines 19a, enter the inside of the front upper edge plate 4b or the rear upper edge plate 5b, and are locked.

Thus, the strawberry can be stored in the packaging box 1 without damaging it, and the left top plate 12 and the right top plate 13 cover the upper portion of the strawberry pack, so that another packaging box 1 can be stacked on the upper portion of the packaging box 1. .. Further, by engaging the projecting pieces 4e, 5e protruding from the front upper edge plate 4b and the rear upper edge plate 5b of the lower packaging box 1 with the notches 20, 20 of the upper packaging box, There is no risk that the load will collapse even if 1 is stacked in multiple stages. Further, when the locking pieces 12a, 13a are inserted into the locking holes 19, the recesses 8a, 9a, 10a, 11a serve as relief portions, so that the locking pieces 12a, 13a are locked in the locking holes 19 respectively. Can be properly inserted into.

When the packaging box 1 is recombined from the above-mentioned stored-items storage state in which the strawberry pack is stored in the packaging box 1 to the stored-items removal state in which the strawberry pack is taken out, as shown in FIGS. 6 to 8. Then, the respective locking pieces 12a of the left top plate 12 are removed from the respective locking holes 19, and the left top plate 12 is superposed on the outer surface side of the left side plate 6 toward the outer surface side of the left side plate 6 through the fold A9. Approximately 270 degrees, and each locking piece 12a is bent 180 degrees toward the outer surface side of the left top plate 12 through the fold line A19 and inserted into each insertion portion 21. Similarly, each locking piece 13a of the right top plate 13 is removed from the locking hole 19, and the right top plate 13 is placed on the outer surface side of the right side plate 7 toward the outer surface side of the right side plate 7 through the fold A10. While being folded back by approximately 270°, each locking piece 13a is bent 180° toward the outer surface side of the right top plate 13 through the fold line A20 and inserted into each insertion portion 21. After passing through the insertion portions 21, the locking pieces 12a, 13a are locked by the step portions 12b, 13b abutting the lower locking projections 6a, 6b, 7a, 7b, respectively.

Thereby, the upper part of the packaging box 1 can be opened greatly, and four strawberry packs can be taken out from the packaging box 1 favorably. Moreover, when inserting each locking piece 12a, 13a into each insertion part 21, the locking protrusions 6a, 6b, 7a, 7b become a guide and a locking part, and each locking piece 12a, 13a is inserted. It can be easily inserted into the portion 21 and can be securely locked.

9 and 10 show a second embodiment of the present invention. A packaging box 31 of the present embodiment is used for packing the contents such as tomatoes and cucumbers, and has a partition plate at the center of the bottom plate 3. Applies to things that do not need to be placed. Note that the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the plate-shaped member 32 configuring the packaging box 31 of the present embodiment, the front side plate 4 includes the front side outer plate 4a continuously formed on the bottom plate 3 through the fold A1 and the front side outer plate 4a. A front upper edge plate 4b integrally formed at the outer edge portion facing the eye A1 via a fold A11, and an outer edge portion of the front upper edge plate 4b facing the fold A11 via a fold A12. The first left inner plate half body 14, the first right inner plate half body 15, and the partition plates 16 and 16 of the first embodiment are not formed.

The rear side plate 5 has a rear side plate 5a continuously formed on the bottom plate 3 via the fold line A2 and an outer edge portion of the rear side plate 5a facing the fold line A2 and a fold line A15. A rear upper edge plate 5b integrally formed with the rear upper edge plate 5b, and a rear inner plate 5c integrally formed at an outer edge portion of the rear upper edge plate 5b facing the fold line A15 via a fold line A16. The second left inner plate half body 17 and the second right inner plate half body 18 of the first embodiment are not formed.

The length dimension (L1) from the fold A5 that is the base end to the tip of the left front connecting piece 33 is the length from the fold A1 that is the base end of the front plate 4 to the tip excluding the protrusion 4d. It is formed to be slightly longer than the dimension (L2), and is provided with a recess 33a near the left side plate 6 that opens to the left end. Further, in the left front connecting piece 33, the length dimension in the left-right direction of the base portion 33b provided with the recess 33a is obtained by subtracting the thickness dimension of the plate member 32 from the length dimension in the front-rear direction of the front outer plate 4a. The left end face of the distal end portion 33c is gradually inclined toward the front side plate 4 toward the front end, and the lengthwise dimension in the left-right direction is shorter than that of the base portion 33b.

The length dimension from the fold A6, which is the base end portion, to the tip end, of the left rear connecting piece 34, is greater than the length dimension from the fold A2, which is the base end portion of the rear side plate 5, to the tip end excluding the protrusion 5d. Is formed to be slightly longer than the left side plate 6, and is provided with a recess 34a that opens to the left side end near the left side plate 6. Further, in the left rear side connecting piece 34, the length dimension in the left-right direction of the base portion 34b provided with the recess 34a is obtained by subtracting the thickness dimension of the plate member 32 from the length dimension in the front-rear direction of the rear outer plate 5a. The front end portion 34c is formed with an inclined surface whose left end face gradually approaches the rear side plate 5 with its left end face toward the front end, and the lengthwise dimension in the left-right direction is shorter than that of the base portion 34b. There is.

The length dimension from the fold A7 that is the base end portion to the tip end of the right front side connecting piece 35 is the length dimension (L2 from the fold A1 that is the base end portion of the front plate 4 to the tip end excluding the protrusion 4d). ), and is provided with a recess 35a near the right side plate 7 that opens to the right end. Further, in the right front connecting piece 35, the length dimension in the left-right direction of the base portion 35b provided with the recess 35a is obtained by subtracting the thickness dimension of the plate member 32 from the length dimension in the front-rear direction of the front outer plate 4a. The front end portion 35c is formed as an inclined surface whose right end face gradually approaches the front side plate 4 with its right end face toward the front end, and has a lateral length dimension shorter than that of the base portion 35b.

The length dimension from the fold A8, which is the base end portion, to the tip end, of the right rear connecting piece 36, is greater than the length dimension from the fold A2, which is the base end portion of the rear plate 5, to the tip end excluding the protrusion 5d. Is formed slightly longer than the right side plate 7 and has a recess 36a near the right side plate 7 that opens to the right end. Further, in the right rear connecting piece 36, the length dimension in the left-right direction of the base portion 36b provided with the recessed portion 36a is obtained by subtracting the thickness dimension of the plate member 32 from the length dimension in the front-rear direction of the rear outer plate 5a. The right end surface of the distal end portion 36c is formed so as to gradually approach the rear side plate 5 with its right end face toward the distal end, and the left-right direction length dimension thereof is formed shorter than that of the base portion 36b. There is.

In the second form example formed as described above, cutting and assembling work of the partition sides 16, 16 performed in the first form example can be omitted, and the first left inner plate half body 14 and the second left inner plate half body can be omitted. Since 17, the first right inner plate half body 15 and the second right inner plate half body 18 are not provided, the number of steps for assembling the plate member 32 is reduced, and workability can be improved.

It should be noted that the present invention is not limited to the stored items as in the above-described embodiments, and any stored items may be used. Further, the constituent elements of the packaging box can be variously modified within the scope of the claims.

DESCRIPTION OF SYMBOLS 1... Packaging box, 2... Plate-shaped member, 3... Bottom plate, 4... Front plate, 4a... Front outer plate, 4b... Front upper edge plate, 4c... Front inner plate, 4d... Projection part, 4e... Projection piece, 5 ...Rear side plate, 5a...rear side outer plate, 5b...rear upper edge plate, 5c...rear side inner plate, 5d...projection portion, 5e...projection piece, 6...left side plate, 6a, 6b...locking projection piece, 7... Right side plate, 7a, 7b... Locking projection piece, 8... Left front side connecting piece, 8a... Recessed part, 9... Left rear side connecting piece, 9a... Recessed part, 10... Right front side connected piece, 10a... Recessed part, 11... Right rear side connecting piece, 11a... Recessed portion, 12... Left top plate, 12a... Locking piece, 12b... Step portion, 13... Right top plate, 13a... Locking piece, 13b... Step portion, 14... First left inner plate half Body, 15... First right inner plate half, 16... Partition plate, 16a... Slit, 17... Second left inner plate half, 18... Second right inner plate half, 19... Locking hole, 19a... Cut Insertion wire, 20... Notch, 21... Insertion part, 31... Packaging box, 32... Plate member, 33... Left front side connecting piece, 33a... Recessed part, 33b... Base part, 33c... Tip part, 34... Left rear side connection Piece, 34a... Recessed portion, 34b... Base portion, 34c... Tip portion, 35... Right front side connecting piece, 35a... Recessed portion, 35b... Base portion, 35c... Tip portion, 36... Right rear side connected piece, 36a... Recessed portion, 36b... Base portion , 36c... Tip

Claims (3)

A rectangular bottom plate, a front side plate, a rear side plate, a left side plate, and a right side plate integrally provided on four sides of the bottom plate via folds, and a left front side connecting piece that connects the front side plate and the left side plate, A right front side connecting piece that connects the front side plate and the right side plate, a left rear side connecting piece that connects the rear side plate and the left side plate, and a right rear side connection that connects the rear side plate and the right side plate. Assembling a plate-shaped member including a piece, a left top plate integrally provided at the left end of the left side plate through a fold, and a right top plate integrally provided at the right end of the right side plate through the fold In the packaging box formed by
The left top plate is formed to be bendable on both the inner surface side and the outer surface side of the left side plate through a fold, and protrudes in the front-rear direction at both ends in the front-rear direction, and through the fold. A pair of locking pieces that can be bent are provided on both the inner surface side and the outer surface side of the left top plate,
The right top plate is formed to be bendable on both the inner surface side and the outer surface side of the right side plate through a fold, and protrudes in the front-rear direction at both ends in the front-rear direction, and through the fold. Provided with a pair of foldable locking pieces on both the inner surface side and the outer surface side of the right top plate,
Locking holes for respectively locking the locking pieces are formed in upper edges of the front side plate and the rear side plate,
A step portion is formed in each of the locking pieces, and a cut line that allows the step portion to pass through is provided in the locking hole.
The left front side connecting piece and the left rear side connecting piece are integrally provided at both ends in the front-rear direction of the left side plate through folds,
The right front connecting piece and the right rear connecting piece are integrally provided at both ends in the front-rear direction of the right side plate through a fold,
Between the front side plate and the left front side connecting piece, between the front side plate and the right front side connecting piece, between the rear side plate and the left rear side connecting piece, the rear side plate and the right rear side connecting piece Between the and, to form an insertion portion for inserting and locking each locking piece,
The left top plate and the right top plate are respectively bent to the inner surface side of the left side plate and the right side plate through folds, and the respective locking pieces are formed through the folds to the left top plate and the right top plate. And the left top plate and the right top plate, each of which is bent to the inner surface side of each of the locking pieces to lock the locking pieces in the locking holes, and the left side plate through the fold. Each of the locking pieces is bent to the outer surface side of the right side plate, and each of the locking pieces is bent to the outer surface side of the left top plate and the right top plate through a fold, and each locking piece is A packaging box, which can be combined with the state in which the contents to be inserted into the insertion portion are taken out. A crease provided between the left side plate and the left top plate and a crease provided between the right side plate and the right top plate are provided with lead creases or reverse creases. The packaging box described in 1. 3. A pair of locking projections, which serve as a guide and a locking part when the locking piece is inserted into the insertion part, are formed on the upper part and the lower part of the insertion part, respectively. The listed packaging box.

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