JP2014141276A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box that has a high tamper-proof effect and can surely leave a trace of unsealing.SOLUTION: The packaging box has: a lid piece 36 for closing opening portions of cylindrical bodies disposed on lateral surfaces 14, 16, 18 and 20; an inserted piece 40 that is provided by consecutive connection to an end of the lid piece 36 through a folding rule; a protruding portion 44 formed on the end portion of the inserted piece 40; and a pair of engaging recessed portions 46 formed on both sides of a base end portion of the protruding portion 44. Further the box comprises: a notched portion 56 that is formed on an end portion of a lateral surface 20 opposing to a lateral surface 16 having the lid piece 36 provided thereon, is notched in width larger than the protruding portion 44 and has a deepest center; an inducing portion 60 protruding from the deepest part of the notched portion 56; a pair of cutting lines 58 that are provided on extended lines of both lateral edges of the base end portions of the inducing portion 60 and departing from each other as separating from each other; and a cover piece 22 that covers the notched portion 56 and the inducing portion 60. The smallest width at the middle of the pair of cutting lines 56 is smaller than an interval between the engaging recessed portions 46 of the protruding portion 44 and the largest width between the pair of cutting lines 58 is larger than the width of the protruding portion 44.

Description

  The present invention relates to a packaging box that closes a lid piece and closes an opening of a box.

  2. Description of the Related Art Conventionally, packaging boxes that store products and display them at a store have assembled box-forming pieces integrally punched from one blank sheet, and are provided with four side surfaces connected to each other. The bottom is formed at the end of the side, the lid is provided at the other end, the opening is closed, and the bottom and lid are provided with a structure that prevents tampering. There is something.

  The suspended packaging box disclosed in Patent Document 1 is composed of a box-shaped piece integrally punched from one blank sheet such as cardboard, and the box-shaped pieces are connected in parallel to each other. Four side surfaces, an upper lid piece formed at an end of one of the side surfaces, and a hanging piece formed by extending from the other side surface facing the side surface on which the upper lid piece is formed. ing. The suspension piece is formed with a locking piece surrounded by a cut, and the upper lid piece is provided with a locking hole into which the locking piece is inserted when the upper cover piece is closed to the box. According to this hanging packaging box, the locking hole is engaged with the locking piece, and the upper lid piece is held unopenable.

  The packaging container disclosed in Patent Document 2 has four side surfaces, and an upper surface plate is formed at the end of one of the side surfaces, and a connection plate having an insertion piece at the leading edge of the upper surface plate. It is connected via a fold. On the side surface opposite to the side surface on which the upper surface plate is provided, a sealing cut is formed into which the insertion piece can be inserted when the upper surface plate is closed to the box. According to this packaging container, when the insertion piece is inserted into the sealing cut, it is locked. When the insertion piece is pulled out, the insertion piece is engaged with the sealing cut, resulting in breakage or damage. . It can grasp | ascertain that a packaging container was opened by damage, and can prevent selling the packaging container opened illegally.

  The packaging box disclosed in Patent Document 3 has four side surfaces, and has an upper lid piece and an upper lid insertion piece at the end of one side surface, and between the upper lid piece and the side surface. A guide slit is provided. On the side surface opposite to the side surface on which the upper lid piece is provided, an upper lid flap extended through a folding curve and an insertion locking piece extended through the folding curve on the upper lid flap are provided. The packaging box is assembled by sealing the top of the box with an upper lid piece and placing the upper lid flap over the top lid piece, and inserting the insertion stopper piece of the upper lid flap into the guide slit of the upper lid piece. , Lock. According to this packaging box, when the insertion locking piece is pulled out, it is broken or damaged, and it is possible to prevent the packaging box from being opened illegally from being sold.

JP 2001-130545 A JP 2011-140316 A JP 2011-230837 A

  In the case of Patent Document 1 of the background art described above, since the state where the locking piece is inserted into the locking hole and is engaged can be seen from the appearance, there is a possibility that no trace remains when opened well, and a sufficient tampering prevention effect is obtained. It is not possible. Similarly, in the case of Patent Document 2 and Patent Document 3, since the engagement state between the insertion piece and the cut-off line for sealing or the insertion piece and the guide slit can be seen from the appearance, a sufficient tampering effect cannot be obtained. In order to prevent tampering with certainty, a shape means invisible from the external appearance was necessary.

  The present invention has been made in view of the problems of the background art described above, and has an object to provide a packaging box that has a high anti-tampering effect and can reliably leave a trace of opening.

  The present invention comprises a box-forming piece integrally punched from one blank sheet. The box-forming piece includes a side surface connected in parallel to each other and assembled into a cylindrical body, and one of the side surfaces. A lid piece that is connected via a crease line and closes the opening of the cylindrical body on the side surface, an insertion piece that is connected to the tip of the lid piece via a crease line, and a tip of the insertion piece And a pair of engaging recesses formed on both sides of the base end of the protrusion, and at the end of the side facing the side where the lid piece is provided A notch portion formed to be wider than the protrusion and having the deepest center, a tongue-shaped guide portion projecting inward from the deepest portion of the notch portion, and a base of the guide portion A pair of ends provided on the extension lines on both side edges of the end portion and spreading toward each other as the distance from the guide portion increases. On the surface of the side surface where the disconnection is provided and the cutout portion and the guide portion are provided, a covering piece is provided to cover the cutout portion and the guide portion, and the minimum width in the middle of the pair of cut lines is: The insertion piece is narrower than the interval between the engaging recesses, the maximum width between the pair of cutting lines is wider than the width of the projection, and the box-forming piece is assembled, and the insertion piece is The engaging recess is engaged with a pair of cutting lines so that it cannot be pulled out, and the engaging part between the insertion piece and the cutting line is a packaging box covered with the covering piece.

  Folding pieces that are folded back on the back surface of the side surface via a crease line are provided at the end of the side surface that is parallel to the side surface on which the lid piece is provided, and between the both ends of the crease line of the folded piece, A through-hole opened in a width that allows the insertion piece to pass therethrough is provided, and the folded piece includes the tongue-shaped guide portion protruding inside the through-hole and both sides of the proximal end portion of the guide portion. A pair of the cutting lines extending in the shape of a letter C is provided on the extended line of the edge.

  An inner lid piece that is overlapped on the back surface of the lid piece in the assembled state of the box-forming piece is provided via a crease line at an end portion of the side surface where the notch portion and the guide portion are provided. On the crease line between the lid piece and the side surface, there is provided a through hole cut out to a width allowing the insertion piece to pass through.

  When the packaging box of the present invention is closed when the lid piece is closed, the insertion piece and the pair of cutting lines are securely engaged, and the insertion piece cannot be pulled out and opened, Breakage occurs, leaving a trace of opening. Since the engagement state of the insertion piece and the cutting line is covered with the covering piece and cannot be seen from the outside, it cannot be opened well while preventing breakage, and has a high tampering effect. Moreover, since the insertion piece is engaged at a predetermined position of the cutting line when inserted along the guide portion, it can be easily engaged even if the cutting line is not visible on the cover piece.

It is a perspective view of the packaging box of 1st embodiment of this invention. It is a partial fracture perspective view of the packaging box of a first embodiment of this invention. It is a perspective view which shows the open state of the packaging box of 1st embodiment of this invention. It is a longitudinal cross-sectional view of the packaging box of 1st embodiment of this invention. It is an expanded view of the packaging box of 1st embodiment of this invention. It is a perspective view which shows the state which the packaging box of 2nd embodiment of this invention opened. It is a longitudinal cross-sectional view of the packaging box of 2nd embodiment of this invention. It is an expanded view of the packaging box of 2nd embodiment of this invention. It is a perspective view which shows the open state of the packaging box of 3rd embodiment of this invention. It is a longitudinal cross-sectional view of the packaging box of 3rd embodiment of this invention. It is an expanded view of the packaging box of 3rd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment of the present invention. A packaging box 10 of this embodiment is an assembly of box-forming pieces 12 formed by punching out a single blank sheet such as paper. Is provided.

  FIG. 5 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 connecting width direction, and the length in the connecting direction is substantially equal to each other when the side surfaces 16 and 20 are long, and the side surfaces 14 and 18 are slightly shorter than each other. Almost equal. A cover piece 22 that is glued to the surface of the side surface 20 in the assembled state of the packaging box 10 is provided on the side edge of the side surface 14. The cover piece 22 and the side surfaces 14, 16, 18, and 20 are divided by crease lines 24, 26, 28, and 30, respectively.

  A rectangular flap 32 is provided at each of a pair of end portions of the side surface 14 in a direction perpendicular to the connecting direction of the side surfaces, separated by a crease line 34.

  A rectangular lid piece 36 is provided on a pair of end portions of the side surface 16 adjacent to the crease line 34 on the side surface 14 and separated by a crease line 38. An insertion piece 40 is further provided on the end of the lid piece 36 opposite to the crease line 38 and separated by a crease line 42. At the center of the end of the insertion piece 40 opposite to the crease line 42, a protrusion 44 protruding outward from the end is integrally formed, and the tip of the protrusion 44 is sharpened in a triangular shape so that it can be easily inserted. A pair of engagement recesses 46 are provided on both sides of the base end portion of the projection 44. The crease line 38 is provided with an opening break line 50, the opening break line 50 is coincident with the crease line 38 on both sides adjacent to the crease lines 26, 28, and the central portion is a center of the side 16 toward the center. It swells in a letter shape and is provided away from the crease line 38.

  A rectangular flap 52 is provided at a pair of end portions of the side surface 18 adjacent to the crease line 38 on the side surface 16 and separated by a crease line 54.

  A pair of end portions 20 a adjacent to the crease line 54 of the side surface 20 of the side surface 20 is provided with a notch portion 56 that is notched to a width that allows the projection 44 of the insertion piece 40 to pass therethrough. The notch 56 is provided in the middle of the end 20a, and is formed in an inverted triangular shape having the deepest middle. At the deepest apex portion of the cutout portion 56, a tongue-shaped guide portion 60 that protrudes to the inside of the cutout portion 56 is provided, and on the extension line on both side edges of the base end portion of the guide portion 60, A pair of cutting lines 58 are provided that spread out in a C shape as they leave. The minimum width between the pair of cutting lines 58 is narrower than the interval between the end portions of the engaging recess 46 of the insertion piece 40, and the maximum width is wider than the width of the protrusion 44.

  Concave portions 62 are provided in the pair of end portions 22 a adjacent to the crease line 34 on the side surface 14 of the cover piece 22. The concave portion 62 is provided in the middle of the end portion 22 a, is formed in an inverted triangular shape having the deepest middle portion, is formed shallower than the cutout portion 56 of the side surface 20, and the covering piece 22 is overlapped on the surface of the side surface 20. The front end of the guide portion 60 is exposed from the deepest apex portion of the concave portion 62 so as to cover the notch portion 56.

  Next, an example of an assembly method of the packaging box 10 of this embodiment will be described. Here, FIG. 5 is a view of 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 is folded forward and the back surface is convex. This is called reverse folding.

  First, the paste 64 is applied to the surface of the side surface 20. The glue 64 is applied at two locations in a straight line along the side edge of the side surface 20 and the inside of the crease line 30. Then, the crease line 28 is folded forward, and the crease line 24 is folded forward. As a result, the surface of the side surface 20 is glued to the back surface of the covering piece 22 by the glue 64. Thereby, it will be in a folded state and the guidance part 60 of the side surface 20 will protrude slightly from the recessed part 62 of the cover piece 22. FIG. In this state, the packaging box 10 in a folded state by the box forming piece 12 is shipped.

  Next, in a factory or the like for storing and packaging the contents, the crease lines 24, 26, 28, and 30 are each normally folded at 90 degrees to form a rectangular box as shown in FIG. The flaps 32, 52 are normally folded at 90 ° by the crease lines 34, 54 at one end of the box, the lid piece 36 is normally folded at 90 ° by the crease line 38, and the insertion piece 40 is creased by the crease line 42. Fold it forward. At this time, the projecting portion 44 of the insertion piece 40 is located on the back surface side of the concave portion 62 of the cover piece 22, the back surface side of the side surface 20 glued to the back surface of the cover piece 22, and the guide portion 60 protruding from the concave portion 62. The protruding portion 44 is inserted so as to be in contact with the surface side, and the protruding portion 44 is deeply pressed. By pushing, the protrusion 44 is inserted between the guide portion 60 and the surrounding side surface 20, the protrusion 44 is inserted and divided between the cutting lines 58, and the outer edge of the C-shaped outer side of the cutting line 58 58 a is located on the front side of the projection 44, and the inner edge 58 b of the C-shape is located on the back side of the projection 44. When the protruding portion 44 is further inserted, it reaches a wide position at a deep position of the cutting line 58, the protruding portion 44 comes out from the cutting line 58 to the surface of the side surface 20, and between the protruding portion 44 and the insertion piece 40. The outer edge 58a of the cutting line 58 is fitted into the engaging recess 46 and is locked as shown in FIG. Thereby, the bottom part of the packaging box 10 is formed. When a force is applied in the direction of pulling out the protruding portion 44, the edge portion 58a is inclined so as to approach the protruding portion 44 side. However, if it is pulled out forcibly, the protrusion 44 is damaged. For this reason, even if force acts in the direction of opening, it cannot open without leaving a trace. The state in which the protrusion 44 and the cutting line 58 are engaged cannot be seen from the outside because they are covered with the cover piece 22 as shown in FIGS.

  Next, the contents are put inside the box body composed of the assembled side surfaces 14, 16, 18, 20 and the bottom, and the projection 44 is locked to the cutting line 58 in the same process as the bottom to form the upper surface. To do. Since the bottom and the top cannot be opened, separate members such as an adhesive tape and glue for sealing are unnecessary.

  When opening the packaging box 10, the inside of the opening breaking line 50 on the side surface 16 is pushed to cut the opening breaking line 50, and the lid piece 36 is lifted upward to open it.

  According to the packaging box 10 of this embodiment, the opening can be reliably sealed only by assembling the box forming piece 12 with a simple structure. It has a high anti-tampering function and can protect products from tampering. In particular, the state in which the protrusion 44 is locked to the cutting line 58 of the side surface 20 is covered with the cover piece 22 and cannot be seen from the outside, so that it cannot be opened well so as not to leave a trace. It can reliably prevent tampering. Further, no separate member such as an adhesive tape or glue for sealing is required, the assembly process is simple, and the cost is low. The protrusion 44 is difficult to come off because the edge 58a of the cutting line 58 is fitted into the engagement recess 46, and is further pressed by the cover piece 22, so that the protrusion 44 is raised three-dimensionally from the side surface 20 and twisted. The engagement is reliable. When opening, the inside of the opening breaking line 50 on the side surface 16 is pushed to cut the opening breaking line 50, and the lid piece 36 can be lifted upward to open easily. It is difficult to pull out from the cutting line 58, and it cannot be opened unless the breaking line 50 for opening is cut and the cover piece 36 is opened. It is highly effective.

  Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The packaging box 66 of this embodiment is provided by assembling a box-forming piece 68 formed by punching out one blank sheet such as paper.

  FIG. 8 is a developed view of the box-forming piece 68 as viewed from the surface. The box-forming piece 68 is formed by connecting the side surfaces 14, 16, and 18 in parallel with each other and separated by the crease lines 28 and 30. ing. A flap 32 is provided at a pair of end portions of the side surface 14 by being separated by a crease line 34. A lid piece 36 and an insertion piece 40 are provided at a pair of ends of the side surface 16 by being separated by crease lines 38 and 42, and a protrusion 44 is integrally formed on the insertion piece 40. The crease line 38 is provided with a breaking line 50 for opening. A flap 52 is provided at a pair of end portions of the side surface 18 by being separated by a crease line 54.

  On the side edge of the side surface 14 opposite to the crease line 28, a side surface 70 is provided by being separated by a crease line 72. The side surface 70 has substantially the same shape as the side surface 16. A pair of end portions of the side surface 70 adjacent to the crease line 34 on the side surface 14 are provided with rectangular folded pieces 74 separated by the crease line 76. On the crease line 76, there is provided a through-hole 78 that is a notch cut out to a width that allows the protrusion 44 to pass therethrough. The through-hole 78 is provided in the middle of the crease line 76, and the shape of the through-hole 78 on the folded piece 74 side is formed in a V-shape that is deepest in the middle. A tongue-shaped guide portion 82 that protrudes inward is provided, and a pair of cutting lines 80 that extend in a C shape as they move away from the guide portion 82 are provided on the extended lines on both side edges of the base end portion of the guide portion 82. ing. The shape of the through hole 78 on the side surface 70 side is formed in a V shape that is deepest in the middle, formed shallower than the shape on the folded piece 74 side, and when the folded piece 74 is folded on the back surface of the side surface 70, The side edge of the through hole 78 on the folded piece 74 side is covered, and the tip of the guide portion 82 is exposed from the deepest portion.

  On the side edge of the side surface 70 opposite to the crease line 72, a glued piece 84 to be glued to the back surface of the side surface 18 in the assembled state of the packaging box 66 is provided by being separated by a crease line 86.

  Next, an example of an assembly method of the packaging box 66 of this embodiment will be described. Here, FIG. 8 is a view of the surface of the box-forming piece 68 of the packaging box 66. The folding method in which the surface of the box-forming piece 68 is convex is folded forward, and the back surface is convex. This is called reverse folding.

  First, paste 88 is applied to the back surface of one folded piece 74. The glue 88 is applied at two locations in a straight line along the side edges located on the extended lines of the crease lines 86 and 72 of the folded piece 74. Then, the crease line 76 is forwardly folded, whereby the back surface of the folded piece 74 is glued to the back surface of the side surface 70 by glue 88. The folded piece 74 on the opposite side is glued to the back surface of the side surface 70 by glue 88 in the same procedure, and the guide portion 82 slightly protrudes from the through hole 78 of the side surface 70. The side surface 70 has a function of a covering piece that covers the cutting line 80 of the folded piece 74.

  Next, the crease line 72 is forward-folded, glue 90 is applied to the surface of the glued piece 84, and the crease line 30 is forward-folded. As a result, the surface of the glued piece 84 is glued to the back surface of the side surface 18 by the glue 90. Thereby, it will be in a folded state, and the packaging box 66 of the folded state by the box formation piece 68 will be shipped in this state.

  Next, in a factory or the like for storing and packaging the contents, the crease lines 86, 72, 28, and 30 are each normally folded at 90 degrees to form a rectangular box. The flaps 32, 52 are normally folded at 90 ° by the crease lines 34, 54 at one end of the box, the lid piece 36 is normally folded at 90 ° by the crease line 38, and the insertion piece 40 is creased by the crease line 42. Fold it forward. At this time, the protruding portion 44 of the insertion piece 40 is inserted into the through hole 78 of the side surface 70, inserted between the guide portion 82 protruding from the edge of the through hole 78 and the side surface 70, and the protruding portion 44 is pushed deeply. As a result, the projection 44 is inserted between the guide portion 82 and the surrounding folded piece 74, the cutting line 80 is divided by the projection 44, and the outer edge 80 a of the C-shaped outer side of the cutting line 80 is projected. It is located on the surface side of the portion 44, the inner edge 80b of the C-shape is located on the back side of the projection portion 44, and when the projection portion 44 is further inserted, it reaches a place where the width is wide at the deep position of the cutting line 80. The protrusion 44 protrudes from the cutting line 80 to the back surface of the folded piece 74, and the outer edge 80 a of the cutting line 80 is fitted and locked in the engagement recess 46 between the protrusion 44 and the insertion piece 40. . This forms the bottom as shown in FIG. When a force is applied in the direction of pulling out the protruding portion 44, the edge portion 80a is inclined so as to approach the protruding portion 44 side. Absent. For this reason, even if force acts in the direction of opening, it cannot open. The state in which the protruding portion 44 and the cutting line 80 are engaged cannot be seen from the outside because they are covered with the side surface 70 as shown in FIGS.

  Next, the contents are put inside the box body composed of the assembled side surfaces 70, 14, 16, 18 and the bottom, and the projection 44 is locked to the cutting line 80 in the same process as the bottom to form the top surface. To do.

  The operation of opening the packaging box 10 is the same as that of the packaging box 10 of the first embodiment.

  According to the packaging box 66 of this embodiment, it has the same effect as the above-described embodiment. Since the box-forming piece 68 of the packaging box 66 has a smaller area than the box-forming piece 12 of the packaging box 10, it can be punched more efficiently from the blank sheet.

  Next, a third embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The packaging box 92 of this embodiment is provided by assembling a box-forming piece 94 formed by punching out one blank sheet such as paper.

  FIG. 11 is a developed view of the box-forming piece 94 as viewed from the surface. The box-forming piece 94 is formed by side surfaces 14, 16, and 18 connected in parallel to each other. A side surface 96 having substantially the same shape as the side surface 16 is formed, and a cover piece 22 that is glued to the surface of the side surface 96 in the assembled state of the packaging box 92 is provided on the side edge of the side surface 14. The cover piece 22 and the side surfaces 14, 16, 18, 96 are separated by the crease lines 24, 26, 28, 98.

  A flap 32 is provided at a pair of end portions of the side surface 14 by being separated by a crease line 34. At a pair of end portions of the side surface 16, a rectangular lid piece 100 is provided by being separated by a crease line 102. At the end of the lid piece 100 opposite to the crease line 102, an insertion piece 104 having a width smaller than that of the end part is provided by being separated by a crease line 106. The insertion piece 104 has a trapezoidal shape that is narrower than the end of the lid piece 100, and a protrusion 108 that protrudes outward from the end is integrally formed at the center of the end opposite to the crease line 106. The tip of the protrusion 108 is formed in a triangular shape so that it can be easily inserted, and a pair of engagement recesses 110 are provided on both sides of the base end of the protrusion 108. The crease line 102 is provided with a breaking line 50 for opening. A flap 52 is provided at a pair of end portions of the side surface 18 by being separated by a crease line 54.

  A rectangular inner lid piece 112 is provided on a pair of end portions of the side surface 96 adjacent to the crease line 54 on the side surface 18, separated by the crease line 114. On the crease line 114, there is provided a through-hole 116 which is a notch cut out to a width allowing the protrusion 108 to pass therethrough. The through-hole 116 is provided in the middle of the crease line 114, and the shape of the side surface 96 side of the through-hole is formed in a V shape that is deepest in the middle, and protrudes inside the through-hole 116 at the deepest portion. A tongue-shaped guide portion 120 is provided, and a pair of cutting lines 118 are formed on the extension lines on both side edges of the base end portion of the guide portion 120 so as to spread from each other in a C shape as the distance from the guide portion 112 increases. The shape of the through-hole 116 on the inner lid piece 112 side is formed in a thin rectangular shape along the crease line 114.

  Next, an example of an assembly method of the packaging box 92 of this embodiment will be described. Here, FIG. 11 is a view of the surface of the box-forming piece 94 of the packaging box 92. The folding method in which the surface of the box-forming piece 94 is convex and the back surface is convex. This is called reverse folding.

  First, the glue 122 is applied to the surface of the side surface 96. The glue 122 is applied at two locations in a straight line along the side edge of the side surface 96 and the inside of the crease line 98. Then, the crease line 28 is folded forward, and the crease line 24 is folded forward. Accordingly, the surface of the side surface 96 is glued to the back surface of the covering piece 22 by the glue 122. Thereby, it will be in a folded state and the guidance part 120 of the side 96 will protrude slightly from the recessed part 62 of the cover piece 22. FIG. In this state, the packaging box 92 in a folded state by the box forming piece 94 is shipped.

  Next, in a factory or the like for storing and packaging the contents, the crease lines 24, 26, 28, and 98 are each normally folded at 90 degrees to form a rectangular box. The flaps 32 and 52 are normally folded at 90 ° with the crease lines 34 and 54 at one end of the box, and the inner lid piece 112 is normally folded at 90 ° with the crease line 114. Then, the lid piece 100 is normally folded at 90 ° by the crease line 102, and the insertion piece 104 is normally folded by the crease line 106. At this time, the protruding portion 108 of the insertion piece 104 is put into the through hole 116 of the inner lid piece 112, and the side 96 is glued to the back surface of the recess 62 of the cover piece 22 and to the back surface of the cover piece 22. The projecting portion 44 is inserted so as to be in contact with the back surface side of this and the front surface side of the guiding portion 120 protruding from the recessed portion 62, and the projecting portion 108 is pushed deeply. By pushing, the protrusion 108 is inserted between the guide portion 120 and the surrounding side surface 96, the protrusion 108 is inserted and divided between the cutting lines 118, and the outer edge 118 a of the C-shaped outer side of the cutting line 118. Is located on the front side of the protrusion 108, and the inner edge 118 b of the C-shape is located on the back side of the protrusion 108. When the protruding portion 108 is further inserted, the protruding portion 108 reaches a wide area at a deep position of the cutting line 118, and the protruding portion 108 protrudes from the cutting line 118 to the surface of the side surface 96. The outer edge 118 a of the cutting line 118 is fitted and locked in the mating recess 110. This forms the bottom as shown in FIG. When a force is applied in the direction of pulling out the protruding portion 108, the edge portion 118a is inclined closer to the protruding portion 108 side, so that the edge portion 118a becomes thinner, and a force for tightening the protruding portion 108 acts to disengage from the engaging recess 110. Absent. For this reason, even if force acts in the direction of opening, it cannot open without leaving a trace. The state where the protrusion 108 and the cutting line 118 are engaged cannot be seen because they are covered with the cover piece 22 as shown in FIGS. Note that glue (not shown) may be applied to the surface of the inner lid piece 112, and the surface of the inner lid piece 112 may be glued to the back surface of the lid piece 100.

  Next, the contents are put inside the box body composed of the assembled side surfaces 14, 16, 18, 96 and the bottom portion, and the protrusion 108 is locked to the cutting line 118 in the same process as the bottom portion to form the upper surface. To do.

  The operation of opening the packaging box 92 is the same as that of the packaging box 10 of the first embodiment.

  According to the packaging box 92 of this embodiment, the same effect as that of the above embodiment is obtained. Since the inner lid piece 112 is provided, dust and foreign matters are less likely to enter, and it becomes more hygienic.

  Note that the present invention is not limited to the above embodiments, and the size and shape of each side surface, the structure of the bottom portion, etc. can be freely changed. Any material that can be reliably fitted and cannot be opened even if force is applied in the opening direction. The shape of the breaking line for opening can be freely changed. The guide part, the cutting part, the protrusion part, and the engagement concave part are provided on both the bottom part and the top surface of the box, but the bottom part of another structure in which one of the side faces is securely closed, and the guidance of the present invention is applied only to the top face. You may provide a part, a cutting | disconnection part, a projection part, and an engagement recessed part. The shape of the guide portion may be any shape that can reliably guide the protrusion, and the tip may be circular or trapezoidal. The order in which the box-forming pieces are connected to the side surfaces, the covering pieces, and the glued pieces may be different.

10, 66, 92 Packaging box 12, 68, 94 Box forming piece 14, 16, 18, 20, 70, 96 Side face 22 Cover piece 36, 100 Lid piece 40, 104 Insertion piece 44, 108 Projection 46, 110 Engaging recess 56 Notch 58, 80, 118 Cutting line 60, 82, 120 Guide part 62 Recess 64, 88, 90, 122 Glue 74 Folding piece 112 Inner cover piece

Claims (3)

It consists of a box-forming piece integrally punched from one blank sheet. The box-forming piece is connected to each other in parallel and assembled into a cylindrical body, and one of the side faces via a crease line. A lid piece that is connected to each other and closes the opening of the cylindrical body on the side surface, an insertion piece that is connected to the tip of the lid piece via a crease line, and is integrated with the tip of the insertion piece. A formed protrusion and a pair of engaging recesses formed on both sides of the base end of the protrusion,
The notch portion formed at the end of the side surface facing the side surface on which the lid piece is provided and notched to a width wider than the protrusion, and having the deepest center, and the notch portion from the deepest portion of the notch portion. A tongue-shaped guide part projecting inward, and a pair of cutting lines provided on the extension lines of both side edges of the base end part of the guide part and extending away from the guide part;
On the surface of the side surface where the notch portion and the guide portion are provided, a covering piece that covers the notch portion and the guide portion is provided,
The minimum width between the pair of cutting lines is narrower than the interval between the engaging recesses of the insertion piece, and the maximum width between the pair of cutting lines is wider than the width of the protrusions,
In the assembled state of the box-forming piece, the insertion piece is engaged with the pair of cutting lines so that the engaging recess is engaged and cannot be pulled out, and the engaging part of the insertion piece and the cutting line is A packaging box, which is covered with the covering piece.   A folded piece is provided at the end of the side surface parallel to the side surface on which the lid piece is provided via a crease line and is folded back on the back surface of the side surface, and the folding between the folded piece and the side surface is provided. The ruled line is provided with a through hole that has a width that allows the insertion piece to pass therethrough, and the folded piece includes a tongue-shaped guide portion that protrudes inside the through hole, and a guide portion of the guide portion. The packaging box according to claim 1, wherein a pair of the cutting lines extending in a U-shape are provided on an extension line of both side edges of the base end portion. An inner lid piece that is overlapped on the back surface of the lid piece in the assembled state of the box-forming piece is provided via a crease line at an end portion of the side surface where the notch portion and the guide portion are provided. The packaging box according to claim 1, wherein a through hole is formed on the crease line between the lid piece and the side surface so as to have a width that allows the insertion piece to pass therethrough.

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