JP7189069B2 - Lid and packaging box provided with the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lid body to be put on a body box and a packaging box provided with the same.

For example, the packaging container described in Patent Literature 1 has a paper container body and a paper lid that closes the upper opening of the container body. Handle openings were formed on both outer side plate portions of the container body, and lid handle openings communicating with the handle openings of the container body were formed in the lid body. In addition, the lid body is formed with a folded projecting piece that is inserted into the handle opening from the cover handle opening and folded back toward the inside and upward of the handle opening (container body). The lid body is fixed to the container body by inserting the folding projecting piece from the outside to the inside of the container body.

Japanese Patent No. 2983507

In order to remove the lid body from the container body, it is necessary to pull out the folding projecting piece to the outside. Couldn't pull it off. Therefore, in the packaging container described above, the lid cannot be easily separated from the container body.

In order to solve the above problems, the present invention provides a lid body that can be easily separated from a body box and a packaging box having the same.

In order to achieve the above object, the present invention provides a lid body to be put on a body box having side holes in side walls, the peripheral wall formed in a cylindrical shape by connecting a plurality of lid side walls, and at least one a connecting piece connected directly or indirectly to an end of one of the lid side walls via a first folding line, the lid side wall having a connecting hole communicating with the side hole of the side wall; and the connecting piece includes an inner piece extending from the first folding line, being bent at the first folding line and in contact with the inner surface of the side wall, and a second folding line at the tip of the inner piece. is bent at the second fold line to pass through the side hole from the inside of the side wall, and fitted into the connection hole from the outside of the lid side wall to be between the inner piece and the side side an outer piece that sandwiches the edge of the hole.

In this case, a flap connected to an end of at least one of the lid side walls and closing at least a part of the end surface of the peripheral wall is further provided, and the connecting piece is formed by cutting a part of at least one of the flaps. It is preferred that

In this case, it is preferable that the outer piece is cut along the second folding line so as to be separated from the inner piece and separated from the connecting hole.

In this case, the connecting piece further includes a frame portion connected to the inner piece portion and the outer piece portion via the two second fold lines, and the outer piece portion is connected to the frame portion. It is preferable to separate from the frame portion and separate from the connecting hole by cutting along the second folding line between.

In this case, the outer piece portion has a convex portion projecting toward the frame portion, and the frame portion and the convex portion are formed by bending from the second folding line. It is preferable that the connecting hole is divided by the line of sight and has a concave portion into which the convex portion of the outer piece is fitted.

In this case, the plurality of lid side walls include a pair of first side walls and a pair of second side walls, and the pair of first side walls and the pair of second side walls are alternately connected to form the peripheral wall. A pair of flaps closing at least a part of the end face of the peripheral wall are continuously provided at the upper ends of the pair of first side walls, and the top ends of the pair of second side walls are butted against each other. A pair of outer flaps are connected to overlap the upper surfaces of the pair of flaps in a folded state, a pair of connection holes are formed in the pair of first side walls, and a pair of connection pieces are provided in the pair of flaps. is formed, and when adhesive tape is attached along the butted portions of the pair of outer flaps, both end portions of the adhesive tape are attached to the pair of outer pieces fitted in the pair of connecting holes. preferably.

In this case, it is preferable that the lid side wall has a handle hole formed continuously with the connecting hole.

Further, in order to achieve the above object, the packaging box of the present invention includes a body box having side holes in side walls, and any one of the above-described lids to be put on the body box.

Further, in order to achieve the above-described object, the packaging box of the present invention includes a body box configured to be vertically stacked in multiple layers, and any one of the lid bodies described above to be put on the body box, The body box includes a bottom wall, a pair of side walls erected at both ends of the bottom wall and having the side holes, and a pair of side walls projecting inward from the side walls and standing on the bottom wall. and a plurality of supporting walls arranged in a posture, each supporting wall has a stacking protrusion projecting from the upper end, and a plurality of the boxes are stacked on the bottom wall. a plurality of lamination holes into which the plurality of lamination protrusions projecting from the body box below are inserted, and the lid body is connected to the end of at least one of the lid side walls, and the peripheral wall of the It has a flap that closes at least a part of the end face, and the flap is formed with a plurality of escape holes into which the plurality of laminated protrusions are inserted when the lid body is put on the body box.

According to the present invention, the lid can be easily separated from the body case.

It is a perspective view showing a packaging box concerning one embodiment of the present invention. FIG. 4 is a perspective view showing a state in which a lid body according to one embodiment of the present invention is separated from a stacking tray; FIG. 4 is a plan view showing the first blank of the stacking tray according to one embodiment of the present invention; FIG. 4 is a plan view showing a second blank of the stacking tray according to one embodiment of the present invention; FIG. 4 is a plan view showing the third blank of the stacking tray according to one embodiment of the present invention; 1 is an exploded perspective view showing a stacking tray according to one embodiment of the present invention; FIG. FIG. 4 is a perspective view showing a state in which a process of connecting stacking trays according to an embodiment of the present invention is completed; FIG. 4 is a perspective view illustrating an assembly process of the stacking tray according to one embodiment of the present invention; FIG. 4 is an enlarged cross-sectional view showing side walls and the like of the stacking tray according to the embodiment of the present invention; FIG. 4 is a plan view showing a blank for a lid body according to one embodiment of the present invention; FIG. 4 is a plan view showing an enlarged part of the blank of the lid according to the embodiment of the present invention; FIG. 4 is a cross-sectional view showing a state of connection between the connecting structure of the lid and the gripping portion of the stacking tray according to the embodiment of the present invention; FIG. 4 is a perspective view showing a state in which the connection between the lid body and the stacking tray is released according to the embodiment of the present invention; FIG. 4 is a cross-sectional view showing a state in which the connection between the lid body and the stacking tray is released according to the embodiment of the present invention; FIG. 8 is a cross-sectional view illustrating another method of releasing the connection between the lid and the stacking tray according to the embodiment of the present invention; FIG. 10 is a plan view showing an enlarged part of the blank of the lid body according to the first modified example of the embodiment of the present invention; FIG. 11 is a plan view showing an enlarged part of a blank of a lid according to a second modified example of one embodiment of the present invention; FIG. 11 is a plan view showing an enlarged part of a blank of a lid body according to a third modified example of one embodiment of the present invention; FIG. 11 is a plan view showing an enlarged part of a blank of a lid body according to a fourth modified example of one embodiment of the present invention;

Embodiments of the present invention will be described below with reference to the accompanying drawings. In each figure, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "Upper" is indicated and "D" indicates "Lower". Also, these directional terms are used for the convenience of explanation and do not limit the technical scope of the present invention.

[Overview of packaging box]
A packaging box 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a packaging box 1. FIG. FIG. 2 is a perspective view showing a state in which the lid body 3 is separated from the stacking tray 2. FIG.

The packaging box 1 includes a stacking tray 2 that can be stacked vertically, and a lid body 3 that covers the stacking tray 2. - 特許庁

As shown in FIG. 2, a stacking tray 2 as an example of a body box is formed in a substantially rectangular parallelepiped shape as a whole. The stacking tray 2 includes a pair of end walls 11 (side walls) and a pair of side walls 12 erected on the periphery of a bottom wall 10 (bottom wall). Although the details will be described later, the bottom wall body 10 has a double layered structure in which a lower bottom wall 10A and an upper bottom wall 10B are laminated. A pair of end walls 11 are erected on both left and right ends of the bottom wall 10 , and a pair of side walls 12 are erected on both front and rear ends of the bottom wall 10 . The end walls 11 are formed higher than the side walls 12, and the stacking tray 2 is formed with an entrance/exit opening 2A continuous from the upper surface to both front and rear surfaces. A substantially rectangular side hole 34 is opened in each end wall 11 . In addition, at the four inner corners of the stacking tray 2, four vertically extending supports 47 are provided. Each pillar 47 is provided for stacking another stacking tray 2 .

As shown in FIG. 2 , the lid body 3 is formed in a substantially rectangular parallelepiped shape that is slightly larger than the outer shape of the stacking tray 2 . The lid body 3 is a so-called semi-A type box that opens the lower surface of the peripheral wall 3W in the shape of a rectangular tube and closes the upper surface of the peripheral wall 3W. The lid 3 covers the stacking tray 2 from above and closes the entrance/exit opening 2A of the stacking tray 2 (see FIG. 1). Although details will be described later, the lid 3 is fixed to the stacking tray 2 while covering the entire stacking tray 2 .

The stacking tray 2 is assembled from first to third blanks 2A, 2B, 2C shown in FIGS. 3-5. The lid 3 is assembled from the blank 3A shown in FIG. These blanks 2A, 2B, 2C, and 3A are each formed by punching out a cardboard sheet made of paper with a die or the like. The corrugated cardboard sheet is, for example, a double-faced corrugated board in which a front liner 9B and a back liner 9C (see FIGS. 2 and 6) are attached to the front and back of a corrugated medium 9A. 3 to 5 and 10 show the front liner 9B side. In this specification, the direction parallel to the core 9A of the corrugated cardboard sheet is called the "corrugation direction", and the direction orthogonal to the corrugation direction is called the "flow direction". The "X" shown in the drawings indicates the "row direction", and the "Y" indicates the "flow direction". Further, in this specification, terms indicating up/down, left/right, front/rear, and similar directions refer to directions in the assembled state (assembled state) of the stacking tray 2 and the lid body 3 .

[Stacking tray blank]
First, the first to third blanks 2A, 2B, 2C of the stacking tray 2 will be described with reference to FIGS. 3 to 5. FIG.

[First blank]
As shown in FIG. 3, the first blank 2A includes a bottom wall 10A, a pair of side walls 12, a pair of end wall pieces 13, and four extension pieces 14. As shown in FIG. A pair of side wall members 12 are connected to both end portions of the lower bottom wall 10A in the step direction, and a pair of end wall pieces 13 are connected to both end portions of the lower bottom wall 10A in the flow direction. Since the pair of side wall bodies 12 are formed symmetrically in the step direction with the lower bottom wall 10A interposed therebetween, one side wall body 12 will be described below.

<Bottom wall>
The lower bottom wall 10A is formed in a substantially rectangular shape elongated in the flow direction. Four lamination holes 15 are formed near four corners of the bottom wall 10A. Each stacking hole 15 is a slit formed at an angle of approximately 45 degrees with respect to the outer edge of the bottom wall 10A. A total of six first lower marks M1 for indexing the position of the upper bottom wall 10B are formed on both sides of the lower bottom wall 10A in the step direction. The first lower mark M1 is a half cut line cut from the back liner 9C side to about half the thickness of the corrugated cardboard sheet.

<Sidewall body>
The side wall body 12 includes an outer plate portion 16 , an upper plate edge portion 17 , an inner plate portion 18 , and an engaging convex portion 19 . The outer plate portion 16, the upper plate edge portion 17, the inner plate portion 18, and the engaging convex portion 19 are arranged side by side in this order from the lower bottom wall 10A side toward the outside in the step direction.

(outer panel)
The outer plate portion 16 is connected to one end portion of the lower bottom wall 10A in the step direction via the first folding line L1. The outer plate portion 16 is formed in a substantially rectangular shape having the same width in the flow direction as the lower bottom wall 10A. The stepwise dimension (extending dimension) of the outer plate portion 16 is set sufficiently shorter (for example, about ⅕) than the stepwise dimension of the lower bottom wall 10A.

(upper plate edge)
The upper plate edge portion 17 is connected to the tip portion of the outer plate portion 16 via the second folding line L2. The upper plate edge portion 17 is formed in a substantially rectangular shape having a width narrower than the width of the outer plate portion 16 in the machine direction. The dimension (extending dimension) of the upper plate edge portion 17 in the step direction is set to be slightly longer than the thickness of the corrugated cardboard sheet.

(inner plate)
The inner plate portion 18 is connected to the tip portion of the upper plate edge portion 17 via the second folding line L2. In other words, the inner plate portion 18 is connected to the tip portion of the outer plate portion 16 via the two second folding lines L2, and the upper plate edge portion 17 is provided between the two second folding lines L2. formed. The inner plate portion 18 is formed in a substantially rectangular shape having the same width in the flow direction as the upper plate edge portion 17 . The dimension (extending dimension) of the inner plate portion 18 in the step direction is set slightly shorter than the extending dimension of the outer plate portion 16 (approximately the thickness of the corrugated cardboard sheet).

(engagement protrusion)
The engaging convex portion 19 is connected to the tip portion of the inner plate portion 18 via the third folding line L3. The engaging convex portion 19 is formed in a substantially rectangular shape having the same width as the inner plate portion 18 in the flow direction. The stepwise dimension (extending dimension) of the engaging convex portion 19 is set to be half or less of the extending dimension of the outer plate portion 16 .

<End wall piece>
The pair of end wall pieces 13 are connected to both end portions of the lower bottom wall 10A in the flow direction via a fourth folding line L4. Each end wall piece 13 is formed in a substantially rectangular shape having the same width in the step direction as the lower bottom wall 10A. The dimension (extension dimension) of each end wall piece 13 in the flow direction is set to be substantially the same as the extension dimension of the outer plate portion 16 . A second lower mark M2 (half-broken line) for indexing the position of the end wall body 11 is formed near the fourth folding line L4 at the center of each end wall piece 13 in the step direction.

<Extension piece>
The four extension pieces 14 are connected to both end portions in the step direction of the pair of end wall pieces 13 via the fifth folding lines L5. Each extension piece 14 is formed in a substantially rectangular shape having the same width as the end wall piece 13 in the flow direction. The dimension (extension dimension) of each extension piece 14 in the step direction is set longer than the combined extension dimension of the outer plate portion 16 and the upper plate edge portion 17 .

The first, second, fourth, and fifth folding lines L1, L2, L4, and L5 are general-purpose ruled lines obtained by linearly flattening the corrugated cardboard sheet from the back liner 9C side in the thickness direction. The general-purpose crease has the function of folding the corrugated cardboard sheet so that the back liner 9C faces inward. The third folding line L3 is a lead ruled line in which a plurality of cuts are made at predetermined intervals on a reverse ruled line formed by flattening the corrugated cardboard sheet linearly in the thickness direction from the front liner 9B side. The reverse crease has the function of folding the cardboard sheet so that the front liner 9B faces inward. The above-described first to fifth folding lines L1 to L5 are not limited to general ruled lines, lead ruled lines (reverse ruled lines), etc., and may be any lines formed for folding corrugated cardboard sheets.

[Second blank]
As shown in FIG. 4, the second blank 2B includes an upper bottom wall 10B and a pair of cylindrical wall bodies 20. As shown in FIG. A pair of cylindrical wall bodies 20 are provided continuously at both end portions in the step direction of the upper bottom wall 10B. Since the pair of cylindrical wall bodies 20 are formed symmetrically in the step direction with the upper bottom wall 10B interposed therebetween, one cylindrical wall body 20 will be described below.

The upper bottom wall 10B is slightly smaller than the lower bottom wall 10A and has a substantially rectangular shape elongated in the step direction. Specifically, the dimension of the upper bottom wall 10B in the flow direction is set to be equal to or less than the value obtained by subtracting the extending dimension of the pair of engaging protrusions 19 from the dimension of the lower bottom wall 10A in the step direction. The dimension of the upper bottom wall 10B in the step direction is set to be equal to or less than the value obtained by subtracting the left and right widths of the two struts 47 from the dimension of the lower bottom wall 10A in the flow direction. A pair of disassembly recesses 26 are formed at the center in the step direction of both end portions in the flow direction of the upper bottom wall 10B. The pair of disassembly recesses 26 are substantially semicircular recesses, and are recessed from both end portions of the upper bottom wall 10B in the flow direction so as to approach each other. A pair of first upper marks M10 are formed on the upper bottom wall 10B so as to extend from the pair of disassembly concave portions 26 in a direction approaching each other. Further, a pair of center marks M11 are formed at the flow direction center of both end portions of the upper bottom wall 10B in the step direction. The first upper mark M10 and the center mark M11 are all cut lines cut in the thickness direction of the cardboard sheet.

<Cylinder wall body>
The cylinder wall body 20 includes a cylinder inner wall 21 , a cylinder top wall 22 , a cylinder outer wall 23 , and a cylinder bottom wall 24 . The cylinder inner wall 21, the cylinder upper wall 22, the cylinder outer wall 23, and the cylinder bottom wall 24 are arranged side by side in this order from the upper bottom wall 10B side toward the outside in the step direction.

The cylinder inner wall 21 is connected to one stepwise end of the upper bottom wall 10B via a sixth folding line L6. The cylinder top wall 22 is connected to the tip of the cylinder inner wall 21 via the seventh folding line L7, the cylinder outer wall 23 is connected to the tip of the cylinder top wall 22 via the eighth folding line L8, and the cylinder bottom. The wall 24 is connected to the tip of the cylinder outer wall 23 via the ninth folding line L9. The cylinder inner wall 21, the cylinder upper wall 22, the cylinder outer wall 23, and the cylinder bottom wall 24 are each formed in a substantially rectangular shape having a width narrower than the width of the upper bottom wall 10B in the flow direction. The stepwise dimension (extending dimension) of the cylinder inner wall 21 and the cylinder outer wall 23 is set shorter than the extending dimension of the outer plate portion 16 . The extension dimension of the cylinder top wall 22 and the cylinder bottom wall 24 is set shorter than the extension dimension of the cylinder inner wall 21 and the like.

A cylinder holding piece 25 is formed by cutting the cylinder inner wall 21 into a substantially rectangular shape at the central portion of the cylinder inner wall 21 in the flow direction. The tube holding piece 25 is connected to the tube inner wall 21 via a holding ruled line L10.

The sixth folding line L6 is a lead ruled line with a plurality of cuts on the reverse ruled line, and the seventh to ninth folding lines L7 to L9 and the holding ruled line L10 are general-purpose ruled lines. The above sixth to ninth folding lines L6 to L9 are not limited to general-purpose ruled lines, lead ruled lines, etc., and may be any lines formed for folding corrugated cardboard sheets.

[Third blank]
As shown in FIG. 5, the third blank 2C includes an end wall 11. As shown in FIG. When assembling the stacking tray 2, two third blanks 2C are used to form a pair of left and right end walls 11. As shown in FIG. Since the two third blanks 2C (pair of end walls 11) have the same shape, one third blank 2C (one end wall 11) will be described below.

<End wall>
The end wall body 11 includes an outer end wall 30 , a pair of outer edge walls 31 , an inner end wall 32 and a pair of support walls 33 .

(Outer end wall)
The outer end wall 30 is formed in a substantially rectangular shape elongated in the flow direction. The dimension of the outer end wall 30 in the flow direction is set slightly shorter than the dimension in the step direction of the end wall piece 13 of the first blank 2A. In the central region of the outer end wall 30, an outer side surface hole 34A having a substantially rectangular shape elongated in the step direction is opened. That is, the outer end wall 30 is formed in a substantially rectangular annular shape. A sandwiching piece 35 is connected to the upper edge of the outer side hole 34A via two sandwiching folding lines L11. In addition, a second upper mark M20 (full broken line) is formed at the center of the end (lower end) of the outer end wall 30 in the flow direction.

(outer edge wall)
The pair of outer edge walls 31 are connected to both end portions of the outer end wall 30 in the flow direction via a side ruled line L12. Each outer edge wall 31 is formed in a substantially rectangular shape having the same width in the step direction as the outer end wall 30 . The dimension of the outer edge wall 31 in the flow direction is set sufficiently shorter than the dimension of the outer end wall 30 in the flow direction. A substantially rectangular inner extension portion 31A is integrally formed on one side (lower side) of each outer edge wall 31 . A pair of inner extension portions 31A extend outward from the outer edge wall 31, and the outer edge wall 31 and the inner extension portion 31A are formed in a substantially L shape as a whole. The dimension in the direction of flow of the outer edge wall 31 and the inner extension portion 31A combined is substantially the same as the dimension in the step direction of the extension piece 14 of the first blank 2A.

(Inner end wall)
The inner end wall 32 is connected to the other end (upper end) of the outer end wall 30 in the step direction via two upper folding lines L13. An upper edge portion 36 is formed between the two upper folding lines L13. The inner end wall 32 is formed in a substantially rectangular shape having a width narrower than the width of the outer end wall 30 in the flow direction. The stepwise dimension of the inner end wall 32 is set to be substantially the same as the stepwise dimension of the outer end wall 30 . An inner side hole 34B having substantially the same shape as the outer side hole 34A opens in a central region of the inner end wall 32, and the inner end wall 32 is formed in a substantially rectangular annular shape.

(support wall)
The pair of support walls 33 are connected to both end portions of the inner end wall 32 in the flow direction. Since the pair of support walls 33 are formed symmetrically with respect to the flow direction with the inner end wall 32 interposed therebetween, one support wall 33 will be described below.

The support wall 33 includes a first body wall 40 , a second body wall 41 , a contact wall 42 , a fixed wall 43 and diagonal walls 44 .

The first body wall 40 is connected to the inner end wall 32 via a first vertical fold line L14, and the second body wall 41 is connected to the first body wall 40 via a second vertical fold line L15. The contact wall 42 is connected to the second body wall 41 via a third vertical fold line L16, and the fixed wall 43 is connected to the contact wall 42 via a fourth vertical fold line L17. The diagonal wall 44 is connected to the fixed wall 43 via a fifth longitudinal fold line L18. The first main body wall 40, the second main body wall 41, the contact wall 42, the fixed wall 43, and the diagonal wall 44 are each formed in a substantially rectangular shape having substantially the same width in the step direction as the inner end wall 32. . The dimensions of the first body wall 40 , the second body wall 41 and the contact wall 42 in the flow direction are set slightly shorter than the dimension of the outer edge wall 31 in the flow direction. The dimension of the fixed wall 43 in the flow direction is set shorter than the dimension of the contact wall 42 and the like in the flow direction.

The dimension of the diagonal wall 44 in the flow direction is set longer than the dimension of the contact wall 42 and the like in the flow direction. In the assembled state, the diagonal wall 44 has a curved recess 45 formed at the lower end thereof, and a laminated projection 46 protruding from the upper end of the diagonal wall 44 . The amount of protrusion of the laminated protrusion 46 is substantially the same as the amount of depression of the curved recess 45 .

Note that the sandwiching folding line L11, the side folding line L12, the upper folding line L13, and the second to fifth vertical folding lines L15 to L18 are of general-purpose formation. The first vertical fold line L14 is a line formed by inserting a plurality of curved cut lines LC at predetermined intervals along the general-purpose ruled line. Each curved cut line LC is formed in a substantially U-shape so as to protrude from the general-purpose ruled line toward the outer end wall 30 . The folding lines L11 to L18 described above are not limited to general ruled lines, and may be any lines formed for folding corrugated cardboard sheets.

As described above, the first blank 2A (lower bottom wall 10A, side wall 12), the second blank 2B (upper bottom wall 10B), and the third blank 2C (end wall 11) are separate members. , the stacking tray 2 is assembled after connecting the first to third blanks 2A to 2C. The connecting process and assembling process of the first to third blanks 2A to 2C may be performed manually by an operator, or may be performed automatically or semi-automatically by a dedicated box making machine or the like. Here, a case where an operator manually performs the connecting process and the assembling process will be described.

[Consolidation process]
Next, a step of connecting the first to third blanks 2A to 2C (connecting step) will be described with reference to FIGS. 3 to 7. FIG. FIG. 6 is an exploded perspective view showing the stacking tray 2. FIG. FIG. 7 is a perspective view showing a state in which the process of connecting the stacking trays 2 is completed.

<First step>
First, the first step for forming the end wall member 11 will be described with reference to FIGS. 5 to 7. FIG. For example, the operator attaches double-sided tape (not shown) to the front liners 9B of the pair of fixed walls 43 . Subsequently, the operator folds the sandwiching piece 35 along the sandwiching folding line L11 toward the back liner 9C, then folds the inner end wall 32 and the upper edge 36 along the upper folding line L13, and folds the sandwiching piece 35. 35 is sandwiched between the outer end wall 30 and the inner end wall 32 .

Next, the operator bends the supporting wall 33 so as to involve it. Specifically, the operator folds the first main body wall 40 along the first vertical folding line L14 at a substantially right angle (folds toward the front liner 9B), and then folds the second main body wall 41, the contact wall 42, and the fixed wall 43. and diagonal walls 44 are mountain-folded (folded toward the back liner 9C) along the second to fifth vertical fold lines L15 to L18, respectively. The fixed wall 43 is adhered to the inner surface (back liner 9C) of the outer end wall 30 via double-sided tape. As a result, a column 47 having a square tubular shape (actually, a rhombic cross section that is slightly collapsed) is formed, and the diagonal wall 44 is arranged inside the column 47 .

In addition, by bonding the fixed wall 43 to the outer end wall 30, the outer end wall 30 and the inner end wall 32 are held in a double wall structure. In this state, the outer side hole 34A and the inner side hole 34B are aligned with each other to form one side hole 34. As shown in FIG.

As described above, the first step is completed, and the end wall body 11 in which two corrugated cardboard sheets are laminated is completed. The operator repeats the above first step to form two end walls 11 .

<Second step>
Next, a second step of connecting the first blank 2A and the end wall 11 will be described with reference to FIGS. 3, 6 and 7. FIG. For example, the worker attaches double-sided tape to the lower portion of the outer end wall 30 of each end wall body 11 (the lower side of the outer side hole 34A), and attaches the outer end wall 30 to the back of the end wall piece 13 of the first blank 2A. Glue to liner 9C. At this time, the outer end wall 30 is aligned by aligning the second upper mark M20 (see FIG. 5) of the outer end wall 30 with the second lower mark M2 of the end wall piece 13 .

By the above, the second step is completed, and the pair of end wall bodies 11 are connected to the lower bottom wall 10A via the end wall pieces 13. As shown in FIG.

<Third step>
Next, a third step of connecting the second blank 2B (upper bottom wall 10B) to the lower bottom wall 10A of the first blank 2A will be described with reference to FIGS. For example, an operator attaches a double-sided tape to the back liner 9C of the upper bottom wall 10B and adheres the upper bottom wall 10B to the lower bottom wall 10A. At this time, the upper bottom wall 10B is aligned by aligning the contour of the upper bottom wall 10B and the pair of first upper marks M10 with the six first lower marks M1 of the lower bottom wall 10A.

Subsequently, the operator attaches a double-faced tape to the front liner 9B of the cylinder bottom wall 24 and bends the cylinder wall body 20 so as to involve it. Specifically, the worker folds the inner wall 21 of the cylinder substantially perpendicularly along the sixth folding line L6, and folds the upper wall 22, the outer wall 23, and the bottom wall 24 of the cylinder along the seventh to ninth folding lines L7, respectively. ～Make a mountain fold along L9. The cylinder bottom wall 24 is adhered to the lower bottom wall 10A via double-sided tape. As a result, the tubular wall body 20 constitutes a rectangular tubular spacer 27 . Further, the operator bends the tube holding piece 25 toward the inside of the spacer 27 along the holding ruled line L10. Thereby, the rectangular tubular shape of the spacer 27 can be maintained. Note that the upper bottom wall 10B may be adhered to the lower bottom wall 10A after the spacers 27 are formed.

By the above steps, the third step is completed, and the bottom wall body 10 having a double-laminated structure in which the lower bottom wall 10A and the upper bottom wall 10B are laminated is formed. This completes the coupling process (see FIG. 7). In this state, the center 9A of the lower bottom wall 10A and the center 9A of the upper bottom wall 10B extend in directions perpendicular to each other. Further, both front and rear ends of the upper bottom wall 10B are separated from the side wall 12 (first folding line L1) toward the center, and are located in a range surrounded by the upper surface of the lower bottom wall 10A and both front and rear ends of the upper bottom wall 10B. A pair of engaging recesses 28 are configured. Furthermore, the four stacking holes 15 opened in the lower bottom wall 10A are exposed on both front and rear sides of the pair of left and right spacers 27 .

It should be noted that the sticking positions and the like of the double-sided tape in the connecting step described above are only examples, and the sticking positions and the number of sticking of the double-sided tapes may be changed as appropriate. Further, in the connecting step described above, as an example, double-sided tape was used, but instead of this, for example, an adhesive may be used. Further, the order of performing the second step and the third step may be exchanged, for example, the third step may be performed after performing the first step, or the first step and the third step may be performed after performing the third step. A second step may be performed.

[Assembly process]
Next, the steps of assembling the stacking tray 2 will be described with reference to FIGS. 1 and 7 to 9. FIG. FIG. 8 is a perspective view explaining the assembly process of the stacking tray. FIG. 9 is an enlarged sectional view showing the side wall body 12 and the like. In addition, here, a case where an operator manually performs the assembly process will be described.

As shown in FIGS. 7 and 8, the stacking tray 2 is assembled by appropriately folding the connected first to third blanks 2A, 2B, 2C. The operator bends the pair of left and right end wall pieces 13 upward along the fourth folding line L4 to bring the pair of left and right end wall bodies 11 into a substantially vertically upright posture. Subsequently, the operator bends each extension piece 14 inward along the fifth folding line L5, and folds the outer edge wall 31 (inner extension portion 31A) of each end wall body 11 inward along the side ruled line L12. fold into As the outer edge wall 31 is bent, the support walls 33 (the first and second main body walls 40 and 41 and the contact wall 42) are pushed out (projected) inward, and the struts 47 having a slightly crushed rhombic cross section are formed. It transforms into a square tube shape with a substantially square cross section. Each strut 47 is provided on the lower bottom wall 10A in an upright posture, covers the stacking hole 15 of the lower bottom wall 10A, and faces the end surface of the spacer 27 in the front-rear direction. In addition, each diagonal wall 44 is arranged on the diagonal line of the cross section of the column 47 . Moreover, the laminated protrusion 46 of each diagonal wall 44 protrudes upward from the upper end surface of the support 47 (fixed wall 43, etc.).

Next, as shown in FIGS. 8 and 9, the operator bends the pair of front and rear outer plate portions 16 upward along the first folding line L1 at a substantially right angle so that each outer plate portion 16 is attached to the extension piece 14. Overlap on the outside. Subsequently, the operator folds the pair of front and rear upper plate edges 17 and the pair of front and rear inner plate portions 18 along the two second folding lines L2 so as to involve the extension pieces 14 and the like. Each inner plate portion 18 is folded downward with respect to the outer plate portion 16 to sandwich the extension piece 14 and the inner extension portion 31A between itself and the outer plate portion 16 .

Subsequently, the operator bends the pair of front and rear engaging projections 19 along the third folding line L3 to take a posture along the bottom wall 10A, and fits each engaging projection 19 into the engaging recess 28. . By fitting the engaging protrusions 19 into the engaging recesses 28 , the outer plate portion 16 and the inner plate portion 18 are held in a state in which the extension piece 14 is sandwiched therebetween. Each engaging projection 19 fitted in each engaging recess 28 forms substantially the same plane as the upper surface of the upper bottom wall 10B.

As described above, the assembly work of the stacking tray 2 is completed (see FIG. 2). In this state, the center 9A such as the end wall 11 extends vertically. A portion of the outer end wall 30 and the inner end wall 32 above the side hole 34 serves as a grip portion 48 that is gripped by the user when the stacking tray 2 is transported.

[Lamination action]
Next, the stacking action of the stacking tray 2 will be briefly described. By placing the bottom wall body 10 of the upper stacking tray 2 on the four pillars 47 of the lower stacking tray 2, a plurality of stacking trays 2 are stacked. When a plurality of stacking trays 2 are stacked, the four stacking protrusions 46 of the lower stacking tray 2 are inserted from below into the stacking holes 15 of the upper stacking tray 2 (not shown).

As described above, when a plurality of stacking trays 2 are stacked, the stacking protrusions 46 of the lower stacking tray 2 are inserted into the stacking holes 15 of the upper stacking tray 2, so that the stacked stacking trays 2 can be stacked horizontally. can be suppressed. Thereby, the stacked state of the plurality of stacking trays 2 can be appropriately maintained. Further, since the stacking protrusions 46 are arranged inside the support columns 47, it is possible to prevent the stacking protrusions 46 from interfering with contents (not shown) such as products placed on the bottom wall body 10. can.

[Lid blank]
Next, the blank 3A of the lid 3 will be described with reference to FIGS. 10 and 11. FIG. 10 is a plan view showing the blank 3A of the lid 3. FIG. FIG. 11 is a plan view showing an enlarged part of the blank 3A.

As shown in FIG. 10, the blank 3A includes a pair of first side walls 50 (lid side walls), a pair of second side walls 51 (lid side walls), passage pieces 52, and a pair of inner flaps 53 (flaps). , a pair of outer flaps 54 and a pair of connecting structures 55 .

<First side wall, second side wall, passage piece>
The pair of first side walls 50 and the pair of second side walls 51 are arranged side by side in the flow direction and are alternately connected via first lid folding lines 56 . The second side wall 51 is formed in a substantially rectangular shape longer in the flow direction than the first side wall 50 . The dimension of the first side wall 50 in the flow direction is set slightly longer than the dimension of the end wall piece 13 in the step direction. The dimension of the second side wall 51 in the flow direction is set slightly longer than the dimension of the outer plate portion 16 in the flow direction. The dimension (height) in the step direction of the first side wall 50 and the second side wall 51 is set slightly longer than the height of the outer end wall 30 and the like. The passage piece 52 is connected to one end of the second side wall 51 in the flow direction via a first lid folding line 56 .

<Inner flap, outer flap>
The pair of inner flaps 53 are connected to one end portion (upper end portion) of the pair of first side walls 50 in the step direction via a second lid folding line 57 . The inner flap 53 is formed in a substantially rectangular shape having substantially the same width in the flow direction as the first side wall 50 . The dimension (extending dimension) of the inner flap 53 in the step direction is set to approximately half the dimension of the first side wall 50 in the flow direction. The pair of outer flaps 54 are connected to one end (upper end) in the step direction of the pair of second side walls 51 via a third lid fold line 58 . The outer flap 54 is formed in a substantially rectangular shape having substantially the same width in the flow direction as the second side wall 51 . The stepwise dimension (extending dimension) of the outer flap 54 is substantially the same as the extending dimension of the inner flap 53 . The inner flap 53 and the outer flap 54 are formed with a plurality of escape holes 59 into which the four stacking protrusions 46 are inserted when the lid 3 is put on the stacking tray 2 . The escape hole 59 opened in the inner flap 53 is slightly larger than the escape hole 59 opened in the outer flap 54 .

In addition, the blank 3A of the lid 3 is formed by folding the first side wall 50 and the second side wall 51 on both sides in the flow direction along the first lid folding line 56 and adhering the extension piece 52 to the inner surface of the first side wall 50. , delivered to the operator in a folded state. Also, the first lid folding line 56 and the third lid folding line 58 are general-purpose formation, and the second lid folding line 57 is a lead crease in which a plurality of notches are made at predetermined intervals along the general-purpose crease. The above-described first to third lid folding lines 56 to 58 are not limited to general-purpose creases, lead creases, or the like, and may be any lines formed for folding corrugated cardboard sheets.

<Connection structure>
As shown in FIG. 10, the pair of connecting structures 55 includes a pair of connecting pieces 60 formed by cutting a part of the pair of inner flaps 53 and a pair of connecting holes formed in the pair of first side walls 50. 70, a pair of handhold holes 74 formed by cutting a part of the pair of first side walls 50, and the pair of connection structures (connection piece 60, connection hole 70, handhold hole 74) have the same structure. Therefore, one connection structure 55 will be described below.

(Connecting piece)
As shown in FIG. 11 , the connecting piece 60 has a first folding line 65 extending substantially parallel to the second lid folding line 57 and a substantially U-shaped portion protruding from both ends of the first folding line 65 to the tip of the inner flap 53 . It is formed in a range surrounded by the formed hollow line 64 (all cut lines). The first fold line 65 is formed at a position away from the proximal end of the inner flap 53 (second lid fold line 57) toward the tip side. The connecting piece 60 is connected to the inner flap 53 via a first folding line 65 . Also, the tip of the connecting piece 60 is formed at a position spaced from the tip of the inner flap 53 toward the base end. That is, the connecting piece 60 is formed by hollowing out the central region of the inner flap 53 in a substantially rectangular shape, and is indirectly connected to the upper end of the first side wall 50 via the first folding line 65 . ing.

The connecting piece 60 includes an inner piece portion 61 , a frame portion 62 and an outer piece portion 63 .

The inner piece 61 is formed in a rectangular shape slightly elongated in the flow direction, and extends from the first folding line 65 to the tip side of the inner flap 53 . The dimension of the inner piece 61 in the flow direction is set shorter than the front-rear width of the side hole 34 (the outer side hole 34A, the inner side hole 34B). The dimension of the inner piece 61 in the step direction is set substantially equal to the height (length in the step direction) of the grip portion 48 of the end wall body 11 .

The frame portion 62 is formed between two second folding lines 66A and 66B, and connected to the inner piece portion 61 and the outer piece portion 63 via the two second folding lines 66A and 66B. ing. The frame portion 62 is formed in a substantially rectangular shape having substantially the same width in the flow direction as the inner piece portion 61 . The dimension of the frame portion 62 in the step direction is set slightly longer than the thickness of the end wall 11 (the length of the upper edge portion 36 in the step direction).

The outer piece 63 is connected to the tip of the inner piece 61 via the frame portion 62 . In other words, the outer piece 63 is connected to the tip of the inner piece 61 via the two second folding lines 66A and 66B. The outer piece portion 63 is formed in a substantially rectangular shape having a width slightly wider than the width in the flow direction of the inner piece portion 61 (frame portion 62). Therefore, a slight step is formed at both end portions in the flow direction between the outer piece portion 63 and the frame portion 62 . The dimension of the outer piece 63 in the step direction is set to approximately half the dimension of the inner piece 61 in the step direction.

Further, the outer piece portion 63 has a convex portion 63</b>A projecting toward the frame portion 62 . The convex portion 63A is formed in the central portion of the outer piece portion 63 in the flow direction. The frame portion 62 and the convex portion 63A are separated by a cut line 67 formed by bending in a substantially U shape from a cutting line 66B. Note that the cutting line 66B is not formed on the convex portion 63A, but extends to both sides of the convex portion 63A.

The first folding line 65 is a lead ruled line in which a plurality of cuts are made on a general-purpose ruled line. A second folding line 66A between the inner piece 61 and the frame portion 62 is a general ruled line, and a second folding line 66B between the outer piece 63 and the frame portion 62 is a plurality of cuts at predetermined intervals. It is a sewing machine blade line. The above-described first and second folding lines 65, 66A, 66B are not limited to general-purpose crease lines, and may be any lines formed for folding corrugated cardboard sheets. In addition, in this specification, in order to distinguish between the two second folding lines 66A and 66B, the second folding line 66B between the outer piece 63 and the frame portion 62 is also referred to as the "cutting line 66B." do. This cutting line 66B has the function of cutting the cardboard sheet in addition to the function of folding the cardboard sheet.

<Connecting hole>
The connecting hole 70 is an opening formed in one side (upper portion) of the first side wall 50 in the step direction. The connecting hole 70 is arranged so as to straddle the side hole 34 and the gripping portion 48 in a state where the lid 3 is placed on the stacking tray 2 . The connecting holes 70 are arranged so as to line up with the connecting pieces 60 in a row. The connecting hole 70 is formed in substantially the same shape as the outer piece portion 63 . Further, the connecting hole 70 has a concave portion 70A into which the convex portion 63A of the outer piece portion 63 is fitted. Although details will be described later, the outer piece portion 63 is fitted into the connecting hole 70 .

<handle hole>
A pair of folding lines 71 are formed in the first side wall 50 from the connecting hole 70 toward the other side (downward) in the step direction. Specifically, the pair of fold lines 71 extend obliquely from both lower corners of the connecting hole 70 so as to approach each other downward. The pair of fold lines 71 are inclined at substantially the same angle, and the tips (lower ends) of the pair of fold lines 71 are in contact (intersect). Further, the first side wall 50 is formed with a dividing line 72 extending from the intersection of the ends of the pair of folding lines 71 to the connecting hole 70 . The dividing line 72 is a total cutting line for dividing the substantially triangular region divided by the pair of folding lines 71 into two. The handle hole 74 is a substantially triangular opening formed by folding a pair of handle pieces 73 partitioned by a pair of handle folding lines 71 and a dividing line 72 along the pair of handle folding lines 71 . The handle hole 74 is formed continuously with the connecting hole 70 in the first side wall 50 .

[Sealing the packaging box]
Next, referring to FIGS. 1, 2 and 12, a procedure for fixing the lid 3 over the stacking tray 2, that is, a procedure for sealing the packaging box 1 will be described. FIG. 12 is a sectional view showing the connection state between the connecting structure 55 of the lid 3 and the gripping portion 48 of the stacking tray 2. As shown in FIG. It is assumed that the stacking tray 2 is in an assembled state and the lid body 3 is in a folded state. It is also assumed that contents (not shown) such as products are placed on the upper surface of the bottom wall body 10 . In addition, the following description will focus on one connecting structure 55 .

First, as shown in FIG. 2, the operator folds the pair of first side walls 50 and the pair of second side walls 51 substantially at right angles along the first lid folding lines 56 . As a result, the pair of first side walls 50 and the pair of second side walls 51 are alternately connected to form a substantially rectangular tubular peripheral wall 3W with both upper and lower end faces open.

Next, the operator places the peripheral wall 3W of the lid 3 above the stacking tray 2 and fits the peripheral wall 3W outside the stacking tray 2 (see the dashed arrow in FIG. 2). That is, the stacking tray 2 is inserted inside the peripheral wall 3W from the opening on the lower surface of the peripheral wall 3W. In this state, the outer peripheral surface of the stacking tray 2 is covered with the peripheral wall 3W, and both front and rear sides of the loading/unloading opening 2A are blocked. Further, in this state, the central portion to the upper portion of the connecting hole 70 faces (overlaps) the grasping portion 48 of the end wall body 11 . That is, part of the gripping portion 48 is exposed through the connecting hole 70 . Also, the lower portion of the connecting hole 70 and the pair of handpieces 73 (handle holes 74 ) are opposed to the side holes 34 of the end wall body 11 . That is, the connecting hole 70 (and the handle hole 74) communicates with the side hole 34 of the end wall body 11. As shown in FIG. In this state, each hand piece 73 closes the hand hole 74 .

Next, the operator folds each inner flap 53 inward along the second lid folding line 57 at a substantially right angle (see FIG. 12). Each inner flap 53 abuts on the upper end surface of each post 47 (excluding the diagonal wall 44) and partially closes the upper surface opening of the peripheral wall 3W (the upper surface of the loading/unloading opening 2A of the stacking tray 2). Note that the tips of the pair of inner flaps 53 are separated from each other. Laminate projections 46 of each diagonal wall 44 are inserted into clearance holes 59 of each inner flap 53 .

Next, as shown in FIG. 12 , the operator bends each connecting piece 60 so as to wind it around the grip portion 48 . Specifically, the operator bends each inner piece 61 downward along the first folding line 65 and bends each frame 62 outward along the second folding line 66A. An operator inserts the tip of each outer piece 63 through the side hole 34 of the end wall 11 into the connecting hole 70 of the first side wall 50 , and inserts each outer piece 63 from the inside of the stacking tray 2 to the outside of the lid 3 . (See the two-dot chain line in FIG. 12). In this state, each inner piece 61 is bent along the first folding line 65 and contacts the inner surface of the end wall body 11 (inner end wall 32). Each frame portion 62 and each outer piece portion 63 are bent at a second folding line 66A and inserted through the side hole 34 from the inside of the end wall member 11 . Each frame portion 62 is in contact with (or may be slightly separated from) the inner peripheral surface of the side hole 34 (the lower end surface of the grip portion 48). Each outer piece 63 penetrates the end wall 11 and the first side wall 50 and extends outward (see the chain double-dashed line in FIG. 12).

Next, the operator bends each outer piece 63 extending outward from the first side wall 50 upward along the cutting line 66B and fits it into the connecting hole 70 . Each outer piece 63 fits into the connecting hole 70 from the outside of the first side wall 50 and sandwiches the edge of the side hole 34 (the grip portion 48 ) between itself and the inner piece 61 . Each outer piece 63 forms substantially the same plane as the outer surface (front liner 9B) of the first side wall 50 when fitted in the connecting hole 70 . Further, when each outer piece 63 is folded along the cutting line 66B, the convex portion 63A is hollowed out from the frame portion 62 and protrudes relatively downward to fit into the concave portion 70A of the connecting hole 70. As shown in FIG. According to this configuration, contact resistance is generated between the convex portion 63A and the concave portion 70A, so that the outer piece portion 63 can be kept in a fitted state in the connecting hole 70. As shown in FIG.

As described above, the lid 3 is temporarily fixed to the stacking tray 2 (the pair of end walls 11) via the pair of connecting pieces 60. As shown in FIG.

Next, as shown in FIG. 1, the operator folds each outer flap 54 inward along the third lid folding line 58 at a substantially right angle. The pair of outer flaps 54 overlaps the upper surfaces within the pair of inner flaps 53 with their tips facing each other. Note that the laminated protrusion 46 inserted through the escape hole 59 of each inner flap 53 is inserted into the escape hole 59 of each outer flap 54 . Each stack projection 46 is formed so as not to protrude from the escape hole 59 of the outer flap 54 .

As shown in FIGS. 1 and 12, the operator applies adhesive tape T along the butted portions of the pair of outer flaps 54 . At this time, both ends of the adhesive tape T are attached to the pair of outer pieces 63 fitted in the pair of connecting holes 70 . Each outer piece 63 is fixed to the first side wall 50 or the like with an adhesive tape T and held in a state of being fitted in the connecting hole 70 . In order to open the hand hole 74 , it is preferable not to attach the adhesive tape T to the hand piece 73 .

As described above, the lid body 3 covers the stacking tray 2 and is connected to the stacking tray 2 . That is, the packaging box 1 is sealed (see FIG. 1).

[Transportation of packaging boxes]
When transporting the packaging box 1 , the operator opens the pair of hand holes 74 in the pair of first side walls 50 . Specifically, the operator pushes the pair of hand pieces 73 of each first side wall 50 inward from the outside. A pair of hand pieces 73 are bent inward along a pair of hand folding lines 71, and a substantially triangular hand hole 74 opens below the outer piece 63 (connecting hole 70) (see FIG. 13). Since the pair of hand pieces 73 face the side hole 34 , they can be bent inward along the pair of hand fold lines 71 without interfering with the end wall body 11 . The operator puts his/her hands into the pair of right and left hand holes 74, grasps the grasping portion 48 around which the connecting piece 60 is wound, and carries the packaging box 1. - 特許庁According to this configuration, the worker can put his or her hand in the handle hole 74, so that the stacking tray 2 with the lid 3 attached can be easily transported.

[Opening the packaging box]
Next, a procedure for opening the packaging box 1 will be described with reference to FIGS. 13 and 14. FIG. FIG. 13 is a perspective view showing a state in which the connection between the lid body 3 and the stacking tray 2 is released. FIG. 14 is a cross-sectional view showing a state in which the connection between the lid 3 and the stacking tray 2 is released.

A worker puts a finger (hand) on the convex portion 63A of each outer piece 63 and pulls each outer piece 63 outward. Then, each outer piece 63 is cut along a cutting line 66B (a second folding line 66B between itself and the frame portion 62), separated from the frame portion 62, and separated from the connecting hole 70. As shown in FIG. As a result, the connection between the stacking tray 2 and the lid 3 is released.

Next, the operator pushes the frame portion 62 remaining in the connecting hole 70 inward from the outside to remove the frame portion 62 from the connecting hole 70 . After that, the operator pulls up the lid 3 and relatively pulls out the stacking tray 2 from the lid 3 .

As described above, the packaging box 1 is opened and the contents accommodated in the stacking tray 2 can be taken out.

In the lid body 3 according to the present embodiment described above, the connecting piece 60 penetrates from the inside of the end wall body 11 toward the outside of the second side wall 51, and the outside piece portion 63 is bent at the cutting line 66B to form the second side wall. It is configured to fit into the connecting hole 70 on the outside of the side wall 51 . Further, the outer piece 63 is cut along the cutting line 66B so that the outer piece 63 passing through the end wall 11 and the first side wall 50 is separated. According to this configuration, the outer piece 63 is exposed to the outside of the lid 3 , so that the operator can easily remove the outer piece 63 from the connecting hole 70 . As a result, the gripping portion 48 (the edge of the side hole 34) can be released from the clamping state between the inner piece portion 61 and the outer piece portion 63, and the connection state between the lid body 3 and the stacking tray 2 can be easily released. be able to. That is, the lid body 3 can be easily separated from the stacking tray 2 .

Further, according to the lid body 3 according to the present embodiment, since the convex portion 63A is hollowed out from the frame portion 62 and protrudes relatively, the worker cuts the outer piece portion 63 along the cutting line 66B. A finger (hand) can be put on the convex portion 63A. Thereby, the work of separating the outer piece portion 63 from the frame portion 62 can be easily performed.

In addition, in the lid body 3 according to the present embodiment, since both end portions of the adhesive tape T are attached to the pair of outer piece portions 63, the outer piece portion 63 separated from the frame portion 62 is attached to the lid via the adhesive tape T. It becomes connected to the body 3 (see FIG. 14). According to this configuration, even if the outer piece 63 is separated from the frame portion 62 , it is possible to prevent the outer piece 63 from being separated from the lid 3 and becoming dust. As a result, the outer piece portion 63 separated from the frame portion 62 can also be discarded together with the lid body 3 .

Further, according to the lid 3 according to the present embodiment, since the handle hole 74 is integrated with the connecting hole 70, the operation of passing the outer piece 63 through the connecting hole 70 and the operation of inserting the outer piece 63 along the cutting line 66B are performed. It is possible to efficiently perform work such as cutting by hand.

In addition, in the packaging box 1 according to the present embodiment, the stacking tray 2 is provided with the stacking protrusion 46 for stacking, and the lid 3 is provided with a release hole 59 for releasing the stacking protrusion 46 of the stacking tray 2. It was configured to According to this configuration, when the stacking tray 2 is covered with the lid 3, the stacking protrusions 46 can be prevented from interfering with the flaps 53, 54, and the like. As a result, the lid 3 can be properly placed over the stacking tray 2 , and the lid 3 can be fixed to the stacking tray 2 via the connecting pieces 60 .

Although the lid 3 (packaging box 1) according to the present embodiment is opened by cutting the outer piece 63 along the cutting line 66B, the outer piece 63 can be opened without being cut. As another opening method of the packaging box 1, for example, as shown in FIG. , the outer piece 63 is pushed in from the outside (see thick arrow in FIG. 15). Then, the outer piece 63 is removed from the connecting hole 70, and the connection between the stacking tray 2 and the lid 3 is released. Next, the operator pulls up the lid 3 to open the stacking tray 2 . According to this configuration, since the outer piece 63 is exposed to the outside of the lid 3, the operator can easily remove the outer piece 63 from the connecting hole 70 and easily remove the outer piece 63. It can be pushed in from the outside of the lid body 3 . As a result, the lid 3 and the stacking tray 2 can be easily disconnected from each other by working on the outside of the lid 3 , so that the lid 3 can be easily separated from the stacking tray 2 .

Further, in the lid 3 according to the present embodiment, the outer piece 63 is connected to the inner piece 61 via the frame portion 62, but the present invention is not limited to this. For example, as shown in FIG. 16, the frame portion 62 is omitted from the cover 3 according to the first modified example, and the outer piece portion 63 extends from the inner piece portion 61 through the second folding line 66B (cutting line 66B). may be connected to. In this case, the convex portion 63A protrudes toward the inner piece portion 61 (the cut line 67). Also, the outer piece 63 is cut along a cutting line (second folding line) 66B, thereby being separated from the inner piece 61 and separated from the connecting hole 70 . Even with this configuration, the same functions and effects as those of the lid body 3 described above can be obtained.

Moreover, in the lid body 3 according to the present embodiment (including the first modified example), the connecting piece 60 is formed by hollowing out a part of the inner flap 53, but the present invention is not limited to this. For example, as shown in FIG. 17, the connecting piece 60 may extend to the tip of the inner flap 53 as the lid body 3 according to the second modification. Alternatively, as shown in FIG. 18 , a connecting piece 60 may be extended from the proximal end of the inner flap 53 as the lid body 3 according to the third modified example. In this case, a part of the second lid folding line 57 may also be used as the first folding line 65 . That is, the connecting piece 60 may be directly connected to the upper end portion of the first side wall 50 via the first folding line 65 . As described above, the connecting piece 60 may be formed by cutting a portion of at least one inner flap 53 . Alternatively, the inner flap 53 and the connecting piece 60 may be separately connected to the end of the first side wall 50 (not shown). Furthermore, as shown in FIG. 19, the inner flap 53 is omitted from the cover body 3 according to the fourth modification, and the connecting piece 60 is directly (or indirectly) connected to the first side wall 50. may be

Also, the packaging box 1 according to the present embodiment (including the first to fourth modifications) includes the stacking tray 2 as an example of the body box, but the present invention is not limited to this. For example, as the packaging box 1 according to the fifth modification, the body box may be a semi-A type box in which the lid 3 is turned upside down (not shown). Even in this case, a side hole 34 communicating with the connecting hole 70 of the lid 3 is opened in the side surface of the body box.

In addition, in the lid body 3 according to the present embodiment (including the first to fifth modifications; the same shall apply hereinafter), the pair of connecting pieces 60 are formed on the pair of inner flaps 53, but the present invention is not limited to this. Not limited. A connecting piece 60 may be formed on at least one of the pair of inner flaps 53 .

Further, in the lid 3 according to the present embodiment, the outer piece 63 is formed with the convex portion 63A and the connecting hole 70 is formed with the concave portion 70A. Part 70A may be omitted (not shown).

Moreover, in the lid body 3 according to this embodiment, the pair of inner flaps 53 are connected to the pair of first side walls 50, but the present invention is not limited to this. The inner flap 53 may be connected to the end of at least one first side wall 50 (not shown). Also, the inner flap 53 may be connected to the end of at least one second side wall 51 (not shown). In addition, the pair of inner flaps 53 are formed to close a part of the upper opening of the peripheral wall 3W, but are not limited to this, and may be formed to close the entire upper opening of the peripheral wall 3W (Fig. not shown).

Moreover, although the handle hole 74 was formed in the lid body 3 according to the present embodiment, the handle hole 74 is not limited to this, and may be omitted if the handle hole 74 is unnecessary (not shown). In addition, the lid body 3 is provided with a pair of outer flaps 54 of a tip-butting type, but the present invention is not limited to this. A full-over type outer flap 54 that covers the top opening of the peripheral wall 3W (not shown) may also be used.

In addition, the packaging box 1 (stacking tray 2, lid 3) according to the present embodiment is formed of double-faced corrugated cardboard made of paper, but is not limited to this, single-faced corrugated board, double-faced corrugated board, double-faced corrugated board, etc. paper cardboard sheet, thick paper, or various resin cardboard sheets.

It should be noted that the description of the above embodiment shows one aspect of the lid and the packaging box provided with the lid according to the present invention, and the technical scope of the present invention is not limited to the above embodiment.

1 packaging box 2 stacking tray (body box)
3 lid 3W peripheral wall 10 bottom wall (bottom wall)
11 end wall (side wall)
15 Lamination hole 33 Support wall 34 Side hole 46 Lamination projection 48 Grip (edge of side hole)
50 first side wall (lid side wall)
51 second side wall (lid side wall)
53 inner flap (flap)
54 Outer flap 59 Relief hole 60 Connecting piece 61 Inner piece 62 Frame 63 Outer piece 63A Convex part 65 First folding line 66A, 66B Second folding line 66B Cutting line 67 Scoring line 70 Connecting hole 74 Hand hole T Adhesive tape

Claims (9)

A lid (3) to be put on a body box (2) having a side hole (34) in the side wall (11),
a peripheral wall (3W) formed in a cylindrical shape by connecting a plurality of lid side walls (50, 51);
A connecting piece (60) connected directly or indirectly to an end of at least one lid side wall via a first folding line (65),
The lid side wall has a connecting hole (70) communicating with the side hole of the side wall,
The connecting piece is
an inner piece (61) extending from the first fold line and bent at the first fold line to contact the inner surface of the side wall;
It is connected to the tip of the inner piece through a second fold line (66A, 66B), is bent at the second fold line, is inserted through the side hole from the inside of the side wall, and is inserted from the outside of the lid side wall. and an outer piece (63) that fits into the connecting hole and sandwiches the edge of the side hole between the inner piece and the inner piece. further comprising a flap (53) connected to an end of at least one lid side wall and closing at least a portion of the end surface of the peripheral wall;
2. The lid according to claim 1, wherein said connecting piece is formed by cutting a part of said at least one flap. 3. The outer piece according to claim 1 or 2, wherein the outer piece is separated from the inner piece by being cut along the second folding line (66B) and separated from the connecting hole. lid. The connecting piece further includes a frame portion (62) connected to the inner piece portion and the outer piece portion via the two second folding lines (66A, 66B),
The outer piece is separated from the frame by being cut along the second folding line (66B) between the frame and separated from the connecting hole. 3. The lid according to 1 or 2. The outer piece portion has a convex portion (63A) projecting toward the frame portion,
The frame portion and the convex portion are separated by a cut line (67) formed by bending from the second fold line,
5. The lid according to claim 4, wherein the connecting hole has a concave portion (70A) into which the convex portion of the outer piece is fitted. the plurality of lid sidewalls includes a pair of first sidewalls (50) and a pair of second sidewalls (51);
The pair of first side walls and the pair of second side walls are alternately connected to form the peripheral wall,
A pair of flaps (53) that close at least a part of the end face of the peripheral wall are continuously provided at the upper ends of the pair of first side walls,
A pair of outer flaps (54) are continuously provided at the upper ends of the pair of second side walls so as to overlap the upper surfaces of the pair of flaps with their tips facing each other,
A pair of the connecting holes are formed in the pair of first side walls,
A pair of connecting pieces are formed on the pair of flaps,
When the adhesive tape (T) is attached along the butted portions of the pair of outer flaps, both end portions of the adhesive tape are attached to the pair of outer pieces fitted in the pair of connecting holes. 6. The lid according to any one of claims 3 to 5, characterized in that: A lid body according to any one of claims 1 to 6, characterized in that said lid side wall has a hand hole (74) formed continuously with said connecting hole. a body box having side holes in the side walls;
A packaging box, comprising: the lid according to any one of claims 1 to 7, which is put on the body box. a body box that can be stacked in multiple layers on the top and bottom;
and a lid according to any one of claims 1 to 7 to be put on the body box,
The body box is
a bottom wall (10);
a pair of side walls (11) erected at both ends of the bottom wall and having the side holes;
a plurality of support walls (33) projecting inward from the pair of side walls and arranged in an upright position on the bottom wall;
A stack projection (46) protrudes from the upper end of each of the support walls,
The bottom wall is formed with a plurality of stacking holes (15) into which a plurality of stacking projections projecting from the lower body box are inserted when a plurality of the body boxes are stacked,
The lid body has a flap (53) connected to an end of at least one lid side wall and closing at least a part of the end surface of the peripheral wall,
A packaging box, wherein the flap is formed with a plurality of relief holes (59) into which the plurality of laminated projections are inserted when the lid body is put on the body box.

Images