JP3224241U - Packaging box - Google Patents

Abstract

Provided is a packaging box that is easy to assemble with a simple structure, has an upper lid piece and a side surface that are assembled without gaps, and that reliably packs the contents. SOLUTION: A plurality of side surfaces 14, 16, 18, and 20 connected in parallel to each other to form a cylindrical body, an upper lid piece 32 connected to the side surface 14 via a crease line 34, and a pair of side surfaces 16 are provided. , 20 have upper flaps 50, 72 connected to each other. The upper flaps 50 and 72 are connected to the side surfaces 16 and 20 via upper flap bending lines 52 and 74 that are curved toward the upper flaps 50 and 72. End portions 50a and 72a of the upper flaps 50 and 72 opposite to the upper flap bending lines 52 and 74 have an arc shape whose central portions are convex outward. The upper lid piece 32 has an insertion piece 36 at the end opposite to the crease line 34, and the insertion piece curved folding line 38 is curved so as to swell toward the insertion piece 36. [Selection] Figure 1

Description

  The present invention relates to a packaging box that closes an opening by closing an upper lid piece and an insertion piece.

  2. Description of the Related Art Conventionally, a packaging box made of a box-shaped piece integrally punched from one blank sheet has a side surface connected in parallel to each other and an upper lid piece that is continuous from the side surface and closes the opening on the top surface of the box. And an insertion piece that is inserted and closed inside the side surface that is connected to and is opposed to the upper lid piece.

  For example, in the packaging box disclosed in Patent Document 1, four side surfaces are assembled into a cylindrical shape, the opening at one end is closed at the bottom, and the other opening is closed at one upper cover piece. The An insertion piece is provided at the tip of the upper lid piece. A pair of side surfaces adjacent to the side surface on which the upper lid piece is provided is provided with an upper flap connected to each other via a curved folding line. The curved fold line includes a side curved fold line that protrudes toward the side surface and is curved, and an upper flap curved curve that is curved so as to protrude from the upper flap side. In the assembled state of the box-forming piece, the upper flap is bent and bent along the shape of the upper flap bending line, and the central portion is gently swollen so as to protrude upward. The upper lid piece is overlaid on the surface of the upper flap and is closed without a gap.

Utility Model Registration No. 3177114

  In the case of the above-mentioned background art, since there are two sides, a side curve fold line and an upper flap curve, between the upper flap and the side surface, care must be taken to fold evenly, and it is difficult to bend and assemble There are many man-hours for the work.

  The present invention has been made in view of the above-described problems of the background art, and provides a packaging box that can be easily assembled with a simple structure, the upper lid piece and the side surface are assembled without any gaps, and the contents are securely packaged. The purpose is to do.

  The present invention consists of a single box-forming piece. The box-forming piece is connected in parallel to each other to form a cylindrical body in an assembled state, and one of the side faces via a crease line. An upper lid piece that is connected to each other and closes the opening of the cylindrical body, and a packaging box that is connected to a pair of side surfaces adjacent to the side surface provided with the upper lid piece and is provided with an upper flap. The upper flap is connected to the side surface via an upper flap curved fold line that is curved so as to swell toward the upper flap, and both end portions of the upper flap curved fold line are formed at corners of the opening edge portion of the side surface. And the upper flap is formed by an arc that can be bent at a right angle to the side surface. In the assembled state of the box-forming piece, the upper flap is bent along the shape of the upper flap bending line and bulges so that the central portion gently protrudes upward, and the upper lid piece forms the box Due to the elasticity of the sheet of the piece, the central portion bulges so as to protrude slightly upward, overlaps the surface of the upper flap, contacts the upper flap that bulges upward, and closes to the back surface of the upper lid piece without any gap.

  An end of the upper flap opposite to the upper flap bending line is formed by an arc whose central portion is convex outward, and the upper flap is substantially semicircular. In the assembled state of the box-forming piece, the end portion is overlapped on the back surface of the upper lid piece and is closed without a gap.

  An insertion piece is provided at an end of the upper lid piece opposite to the crease line through an insertion piece bending fold line, and the insertion piece bending fold line is curved so as to swell toward the insertion piece side. Both ends of the insertion piece bending fold line are located at corners of the upper lid piece, and the insertion piece is formed by an arc that can be bent at a right angle to the upper lid piece. When the packaging box is assembled and closed with the upper lid piece, the insertion piece is bent at the insertion piece bending fold line and inserted into the back surface of the side surface facing the side surface provided with the upper lid piece. The upper lid piece is closed, and the upper lid piece gently protrudes in the vicinity of the center of the insertion piece bending fold line, and the gap with the side surface into which the insertion piece is inserted becomes small.

  The packaging box of the present invention has a simple structure and is easy to assemble, and the upper lid piece and the side surface are assembled without a gap, so that the contents can be packaged reliably.

It is the perspective view (a) which shows the state which opened the upper cover piece of the packaging box of one Embodiment of this invention, and the perspective view (b) which shows the state which closed the upper cover piece. It is an expanded view of the packaging box of this embodiment. It is a front view which shows the process of closing the upper cover piece of the packaging box of this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention, and a packaging box 10 of this embodiment is provided by assembling a box-forming piece 12 formed by punching a sheet of paper or the like. ing.

  FIG. 2 is a developed view of the box-forming piece 12 as viewed from the surface. The box-forming piece 12 is formed by connecting side surfaces 14, 16, 18, and 20 in parallel with each other. The side surfaces 14, 16, 18, and 20 have the same length in the width direction orthogonal to the connecting direction, and the length in the connecting direction is substantially equal to each other when the side surfaces 14 and 18 are long, and the side surfaces 16 and 20 are short. Are almost equal to each other. Further, a glued piece 22 that is glued to the back surface of the side surface 20 in the assembled state of the packaging box 10 is provided on the side edge portion of the side surface 14. The glued piece 22 and the side surfaces 14, 16, 18, and 20 are divided by crease lines 24, 26, 28, and 30, respectively.

  In the side surface 14, a rectangular upper lid piece 32 is provided at one end in a direction perpendicular to the connecting direction of the side surfaces, separated by a straight crease line 34. An insertion piece 36 is further provided on the end of the upper lid piece 32 opposite to the crease line 34 by being separated by an insertion piece curved folding line 38. The insertion piece curved folding line 38 is a slight arc whose both ends are positioned at the corners of the upper lid piece 32 and the insertion piece 36 can be bent at a right angle with respect to the upper lid piece 32. Is formed to bulge to the tip side of the insertion piece 36 on the opposite side.

  A first bottom cover piece 40 that forms a bottom portion is provided on an end of the side surface 14 opposite to the crease line 34, and is divided by a crease line 42. The first bottom cover piece 40 is formed in a trapezoidal shape with the crease line 42 as a lower base, and an end 40 a that is an upper base parallel to the crease line 42 is closer to the crease line 24 than the crease line 26. Positioned and deformed trapezoid. The length from the crease line 42 to the end portion 40a is a length that reaches the position close to the side surface 18 that faces the center line of the bottom portion in the assembled state of the packaging box 10. On the hypotenuse located on the crease line 26 side of the pair of hypotenuses connecting the end of the crease line 42 to the end of the end portion 40a, a substantially triangular bottom glued piece 44 is located near the crease line 42. The lines are separated by a crease line 46. The position where the side edge of the bottom glued piece 44 opposite to the crease line 42 and the oblique side of the first bottom cover piece 40 intersect is located in the center of the bottom in the assembled state of the packaging box 10. At the corner where the hypotenuse where the bottom glued piece 44 is provided and the end 40a intersect, a protrusion 40b bulging in a semicircular shape toward the bottom glued piece 44 is formed. Is separated from the first bottom cover piece 40 by a crease line 48 having an angle close to the hypotenuse.

  A substantially semi-circular upper flap 50 is provided at the end of the side surface 16 adjacent to the crease line 34 of the side surface 14 and separated by an upper flap curved fold line 52. The upper flap curved fold line 52 is curved and formed so as to swell toward the upper flap 50, and both end portions of the upper flap curved fold line 52 are located at the corners of the opening edge of the side surface 16. It is formed of an arc that can be bent at a right angle to the side surface 16. An end 50a of the upper flap 50 opposite to the upper flap curved folding line 52 is formed by an arc whose central portion is convex outward. Both ends of the end portion 50 a are positioned at the corners of the opening edge of the side surface 16, and the portion continuous with the corner portion is a short straight line positioned at the crease line 26 or an extension of the crease line 28. A step portion 54 to which the insertion piece 36 of the upper lid piece 32 is locked is formed at an end portion located on the extension line of the crease line 28. A trapezoidal bottom flap 56 forming a bottom portion is provided on an end portion of the side surface 16 opposite to the upper flap curved fold line 52, separated by a crease line 58.

  An end portion 18 a of the side surface 18 adjacent to the upper flap bending line 52 of the side surface 16 is an opening edge portion that opens upward in the assembled state of the packaging box 10, and nothing is provided. The end 18a is provided with an opening pressing portion 60 that is pressed by a finger when opening. The opening pressing portion 60 is surrounded by a central portion of the end portion 18a and a U-shaped break line 62 and is separated from the periphery.

  A second bottom cover piece 64 is provided on an end portion of the side surface 18 opposite to the end portion 18 a by being separated by a crease line 66. The second bottom cover piece 64 has the same shape as the first bottom cover piece 40, is formed in a trapezoidal shape with the crease line 66 as a lower base, and an end portion 64a that is an upper base parallel to the crease line 66 has It is located near the crease line 28 rather than the crease line 30 and becomes a deformed trapezoid. On the hypotenuse located on the crease line 30 side, a substantially triangular bottom glued piece 68 is provided at a position close to the crease line 66 and separated by a crease line 70. A projecting portion 64b bulging in a semicircular shape toward the bottom pasting piece 68 is formed at the corner where the hypotenuse where the bottom pasting piece 68 is provided and the end 64a intersect, and the projecting portion 64b. Is separated from the second bottom cover piece 64 by a crease line 48 having an angle close to the hypotenuse.

  A substantially semi-circular upper flap 72 is provided at the end of the side surface 20 adjacent to the end 18 a of the side surface 18, separated by an upper flap bending line 74. The upper flap 72 has the same shape as the upper flap 50. The upper flap curved fold line 74 is formed so as to bulge toward the upper flap 72, and both end portions of the upper flap curved fold line 74 are located at the corners of the opening edge of the side surface 20, and the upper flap 72 is It is formed by an arc that can be bent at a right angle to the side surface 20. An end 72a of the upper flap 72 opposite to the upper flap curved folding line 74 is formed by an arc whose central portion is convex outward. The end portion 72a has both end portions positioned at the corners of the opening edge of the side surface 20, and a portion continuous with the corner portion is a crease line 30 or an extension line of a side edge portion located on the opposite side of the crease line 30. It is a short straight line. A step portion 54 is formed at the end located on the extension line of the crease line 30. A trapezoidal bottom flap 76 having the same shape as the bottom flap 56 is provided at the end of the side surface 20 opposite to the upper flap curved folding line 74 and separated by a crease line 78.

  Next, an example of the assembly method of the packaging box 10 of this embodiment is demonstrated. Here, FIG. 2 shows the surface of the box-forming piece 12 of the packaging box 10, and the folding method in which the surface of the box-forming piece 12 is convex and the back surface is convex. Is called reverse folding.

  First, the first bottom lid piece 40, the bottom flap 56, the second bottom lid piece 64, and the bottom flap 76 are normally folded at the crease lines 42, 58, 66, and 78, and then the crease line of the first bottom lid piece 40 is obtained. 46 and the crease line 70 of the second bottom cover piece 64 are reversely folded, and glue 80 is applied to the back surfaces of the bottom glued pieces 44 and 68, respectively. Next, paste 82 is applied to the surface of the glued piece 22, the crease line 26 is forward-folded, and then the crease line 30 is forward-folded. As a result, the glued piece 22 is glued to the back surface of the side surface 20 with glue 82, and the back surface of the bottom glued piece 44 of the first bottom cover piece 40 is glued to the surface of the bottom flap 56 by glue 80. The back surface of the bottom glued piece 68 of the lid piece 64 is glued to the surface of the bottom flap 76 by glue 80. Thereby, the box forming piece 12 is in a folded state, and is shipped in this state.

  Next, in a factory for packaging and packaging the contents, the crease lines 24, 26, 28, and 30 are each normally folded at 90 ° to form a rectangular cylinder. At this time, the bottom glued piece 44 of the first bottom cover piece 40 is glued to the bottom flap 56, and the bottom glued piece 68 of the second bottom lid piece 64 is glued to the bottom flap 76. The ruled lines 42, 58, 66, and 78 are automatically caused to open at approximately 90 °, and the bottom is formed with one touch. The end portion 40a of the first bottom cover piece 40 overlaps the back surface of the bottom flap 76, and the end portion 64a of the second bottom cover piece 64 overlaps the back surface of the bottom flap 56 and is locked together. In the assembly process, the protrusions 40b and the protrusions 64b slide while the surfaces of the protrusions 40b and the protrusions 64b are aligned with each other while being folded along the crease line 48. . As a result, the bottom portion is securely locked, the shape of the bottom portion of the box body is maintained, the return to the folded state is prevented, and the state shown in FIG.

  A container (not shown) is placed in the packaging box 10, and the upper flaps 50 and 72 are normally folded at 90 ° by the upper flap bending lines 52 and 74. At this time, the upper flaps 50 and 72 are bent and bent along the shape of the upper flap bending lines 52 and 74, and the central portion in the direction parallel to the upper flap bending lines 52 and 74 is gently upward. Inflates to be convex.

  Next, as shown in FIG. 3, the upper lid piece 32 is normally folded at 90 ° by the crease line 34, and the insertion piece 36 is further normally folded by 90 ° by the insertion piece curved folding line 38. Is inserted along the back surface of the side surface 18 and closed, and the state shown in FIG. At this time, the shape of the upper lid piece 32 in the direction intersecting with the crease line 34 swells so that the central portion gently protrudes upward due to the elasticity of the sheet of the box forming piece 12. However, the upper flaps 50 and 72 are overlapped with the curved folding lines 52 and 74 on the back surface of the upper lid piece 32 swelled upward so as to protrude upward. Further, since the end portions 50a and 72a of the upper flaps 50 and 72 are formed in circular arcs, they can follow the curvature of the rear surface of the upper lid piece 32 that bulges upward so as to protrude upward. Contact without gaps.

  The side surfaces 16 and 20 have upper flap bending fold lines 52 and 74 as opening edges, but the opening edges are formed in an arc that is convex upward, and therefore coincide with the curvature of the upper lid piece 32, The gap between the pair of side edge portions 32a located on the extended lines of the crease lines 24 and 26 is small. Further, the insertion piece 36 of the upper lid piece 32 is bent and bent along the shape of the insertion piece bending fold line 38, and the vicinity of the center of the insertion piece bending fold line 38 of the upper lid piece 32 becomes gently convex. The gap with the side surface 18 is reduced, and the vicinity of the center of the insertion piece 36 is in contact with the back surface of the side surface 18 with almost no gap. Then, the vicinity of the center of the insertion piece 36 and the opening pressing portion 60 on the side face 18 are glued together to complete the packaging.

  When opening the packaging box 10, the opening pressing portion 60 is pushed to cut the breaking line 62, the insertion piece 36 is pulled out, and the upper lid piece 32 is opened.

  According to the packaging box 10 of this embodiment, assembly is easy with a simple structure, the upper cover piece 32 and the side surfaces 16 and 20 are assembled without a gap, and the contents can be packaged reliably. The back surface of the upper lid piece 32 and the upper flaps 50 and 72 are closed without a gap, and the gap between the pair of side edge portions 32a of the upper lid piece 32 and the opening edges of the side surfaces 16 and 20 is small. Since the gap between the insert piece 36 and the side surface 18 is also small, it can be packaged in a state in which the product, which is the contents, is securely covered, and foreign matter can be prevented from being mixed and the product can be kept clean. Similarly, when the upper lid piece 32 is resealed, it can be resealed without a gap. Moreover, since the clearance gap between the insertion piece 36 of the upper cover piece 32 and the side surface 18 is small, the pressing part 60 for opening and the insertion piece 36 can be reliably glued and closed. The structure is simple, the assembly process is not increased, and labor and cost are not required.

  In addition, the packaging box of this invention is not limited to said each embodiment, The magnitude | size and shape of each side surface, the structure of a bottom part, etc. can be changed freely. The contents can be used for various things. The material of the box forming piece can be freely selected such as a synthetic resin other than paper or a laminate of synthetic resin and paper.

DESCRIPTION OF SYMBOLS 10 Packaging box 12 Box body formation piece 14,16,18,20 Side surface 32 Upper cover piece 24,26,28,30,34,42,46,58,66,70,78 Folded line 36 Insertion piece 38 Insertion piece Curved folding lines 50, 72 Upper flaps 50a, 72a Ends 52, 74 Upper flap curved folding lines

Claims (2)

The box-forming piece is composed of a plurality of side surfaces connected in parallel to each other to form a cylindrical body in an assembled state, and connected to one of the side surfaces via a crease line. An upper lid piece that closes the opening of the cylindrical body, and an upper flap that is connected to each of a pair of side surfaces adjacent to the side surface provided with the upper lid piece,
The upper flap is connected to the side surface via an upper flap curved fold line that is curved so as to swell toward the upper flap, and both end portions of the upper flap curved fold line are formed at corners of the opening edge portion of the side surface. Located, and the upper flap is formed by an arc that can be bent at a right angle to the side surface;
In the assembled state of the box-forming piece, the upper flap is bent along the shape of the upper flap curved fold line so that the central portion gently bulges upward and the upper lid piece is the upper flap. It is overlapped on the surface and is in contact with the upper flap that swells upward and is closed without any gap on the back surface of the upper lid piece,
The end of the upper flap opposite to the upper flap curve fold line is formed by an arc whose central portion is convex outward, and in the assembled state of the box forming piece, A packaging box characterized in that the ends are stacked and closed without gaps. An insertion piece is provided at an end of the upper lid piece opposite to the crease line through an insertion piece bending fold line, and the insertion piece bending fold line is curved so as to swell toward the insertion piece side. And both ends of the insertion piece bending fold line are located at corners of the upper lid piece, and the insertion piece is formed by an arc that can be bent at a right angle with respect to the upper lid piece,
When the packaging box is assembled and closed with the upper lid piece, the insertion piece is bent along the insertion piece bending fold line and inserted into the back surface of the side surface facing the side surface provided with the upper lid piece. 2. The packaging box according to claim 1, wherein the upper lid piece is closed, and the upper lid piece is gently convex in the vicinity of the center of the insertion piece bending fold line so that a gap between the insertion piece and the side surface is reduced. .

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