JP6522364B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box formed by closing a lid and closing an opening of the box.

  Conventionally, there is a packaging box for storing products and displaying them at a shop, in which there is an assembly of box forming pieces punched out integrally from one blank sheet, and four side faces are connected to be provided. And the bottom is formed at one end of the side, the lid is provided at the other end, the opening is closed, and the bottom or lid is provided with a structure for preventing tampering There is something that is done.

  For example, the packaging box disclosed in Patent Document 1 includes a lid piece for closing the opening of a cylinder on four sides and a plug-in piece provided so as to be connected to the tip of the lid piece via a folding line. And a projection formed at the tip of the insertion piece. On the side opposite to the side on which the lid piece is provided, a cutting line is provided, into which the projection piece is inserted and engaged, and the insertion piece is securely engaged with the cutting line to prevent tampering. Can.

  In the packaging box disclosed in Patent Document 2, a mounting piece and a wide insertion piece are provided at the tip of a top surface which is a lid. In order to lock the mounting piece, the front edge of the left and right inner flaps is provided with a locking portion consisting of a notch of a predetermined shape. Then, the mounting piece is locked to the locking portion, and the rear end edge of the insertion piece is positioned on the lower surface of the inner flap, so that tampering can be reliably prevented.

JP, 2014-141276, A JP, 2010-215263, A

  In the case of the above-mentioned background art, since the inserted or locked pieces are large, they are suitable for relatively large packaging boxes and are not suitable for small packaging boxes. Furthermore, if the insertion piece or the insertion piece is made smaller, there is a possibility that the locking strength may be lowered or it may be deformed at the time of locking. In addition, in the reference example 1, the concave portion and the plug-in piece are located on the side surface, and affect the design when printing small characters on the back surface of the box. Reference Example 2 also has a problem that it is difficult for the user to open the product.

  The present invention has been made in view of the above-mentioned problems of the background art, and provides a packaging box which has a high falsification preventing effect, can reliably leave a trace of an opening, and reliably prevents falsification. With the goal.

  The present invention comprises a box forming piece integrally punched out of a single blank sheet, the box forming piece having a side surface connected in parallel to each other and being assembled into a cylinder, and one of the side surfaces A cover piece connected via a fold line and bent at the fold line to close the opening of the cylindrical body at the side, and connected via a fold line to a side edge of the cover piece intersecting the fold line; The locking piece, the locking piece integrally formed at the tip of the locking piece, and the side surface adjacent to the side surface on which the lid piece is provided and located in the vicinity of the locking piece The lock piece is bent at the folding line when the lid piece is bent and closed at the folding line in the assembled state of the box formation piece. Parallel to the side on which the part is provided, and intersecting the crease As the lid piece is bent at the folding line, the locking piece rotates about the folding line as a central axis, and the tip of the locking piece is inserted into the insertion portion together with the lock piece, It is a packaging box in which a lock piece is locked to the said insertion part and drawing becomes difficult.

The lock piece is a triangular protrusion formed of a linear relief portion and a linear abutment portion, and the insertion portion is provided at a cutting line intersecting the rotation direction of the locking piece. When a part of the cutting line is inclined at a predetermined angle, and the locking piece is inserted into the insertion part together with the lock piece, the relief part of the lock piece is fixed to the inclined part. When crossing and the lid piece is closed, the contact portion of the lock piece coincides with the inclined portion substantially in parallel. Furthermore, the end side of the side face is located on the back side of the locking piece, and the center side of the side face is located on the front face side of the locking piece, with the inserted portion interposed, and the end face of the inclined portion And, the end faces of the lock pieces are locked opposite to each other, making it difficult to pull out.

  On the side surface provided with the insertion portion, a fold line extending in a direction crossing the insertion portion and approaching the locking piece is provided in a portion close to the insertion portion.

  Each of the locking pieces is provided on a pair of side edges intersecting the folding line of the lid piece, and each of the pair of side surfaces adjacent to the side surface on which the lid piece is provided is shifted The insertion part is provided.

  The creases may be formed by broken lines. Further, the bending line may be formed by a break line.

  The packaging box of the present invention has a high falsification preventing effect, can reliably leave an opening mark, and reliably prevents falsification. The lock piece engaged with the insertion portion on the side surface has a simple shape and high strength, and even if the lock piece is small, it can be reliably locked without being deformed and tampering can be prevented. Even when the box is small, it is possible to obtain a high falsification preventing effect. And when a user uses it, it can be opened easily.

It is a perspective view of the packaging box of 1st embodiment of this invention. It is a perspective view which shows the state before closing the cover piece 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 front view which shows the folded state of the packaging box of 1st embodiment of this invention. It is the schematic which shows the assembly process of the packaging box of 1st embodiment of this invention. It is a perspective view of the packaging box of 2nd embodiment of this invention. It is a perspective view which shows the state before closing the cover piece 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.

  Hereinafter, embodiments of the present invention will be described based on the drawings. FIGS. 1 to 5 show a first embodiment of the present invention, and the packaging box 10 of this embodiment is assembled from a box-forming piece 12 formed by punching a blank sheet made of paper or the like. Is provided.

  FIG. 3 is a developed view of the box-forming piece 12 as viewed from the surface, and the box-forming piece 12 is formed by connecting side faces 14, 16, 18, 20 in parallel to one another. The side surfaces 14, 16, 18, and 20 are rectangles having substantially the same size as each other, and are rectangles that are longer in the width direction than the length in the connection direction. On the side edge of the side surface 20, a pasted piece 22 is provided which is glued to the back surface of the side surface 14 in the assembled state of the packaging box 10. The side surfaces 14, 16, 18, 20 and the glued pieces 22 are separated by the creases 24, 26, 28, 30 respectively.

  Rectangular flaps 32 are provided by being separated by fold lines 34 at a pair of ends in a direction perpendicular to the connecting direction of the side surfaces 14.

  At one end of the side surface 16 adjacent to the fold line 34 of the side surface 14, a substantially square lid piece 36 is provided separated by the fold line 38. The creases 38 are formed by broken lines, and the portion adjacent to the creases 34 is a perforation 38a, and the remaining portion is a zipper 38b. The side edge 36a of the lid piece 36 located on the extension line of the creased line 24 is formed with a knob 40 which is located on the flap 32 side with the portion in contact with the flap 32 and slightly protrudes to the outside of the lid piece 36 There is.

  A plug-in piece 42 is provided by being separated by a fold line 44 at the end of the lid piece 36 opposite to the fold line 38. In the part adjacent to the side edge part 36a of the crease line 44, the score line 46 is provided. A lid piece 48 having the same shape as the lid piece 36 is provided at the end of the side surface 16 opposite to the creased line 38 by being separated by the creased line 50. At the end opposite to the fold line 50 of the lid piece 48, a plug-in piece 52 is provided separated by a fold line 54, and a cut line 56 is provided in a portion near the flap 32 of the fold line 54. ing.

  At the end of the side face 18 adjacent to the fold line 38 of the side face 16, a locking piece 58 is provided separated by a separating line 60, and the separating line 60 is formed as a cutting line. The side edge of the locking piece 58 positioned on the extension line of the fold line 26 is continuous with the lid piece 36 via the folding line 64. The folding line 64 is positioned slightly closer to the locking piece 58 than the extension of the folding line 26. The side edge 58 a opposite to the folding line 64 of the locking piece 58 is located slightly inside the side surface 18 than the extension of the folding line 28. The end 58b of the locking piece 58 opposite to the separation line 60 is located on the extension of the folding line 44 of the lid 36, and the locking piece 66 is located at the corner surrounded by the end 58b and the side edge 58a. Is formed. The lock piece 66 is a triangular protrusion formed by a linear relief portion 66a which continues and intersects the side edge portion 58a at a predetermined angle, and a linear abutment portion 66b which intersects the relief portion 66a. The apex of the lock piece 66 is substantially at the same height as the tip 58b. The portion of the end portion 58b continuous with the contact portion 66b of the lock piece 66 draws a curved line that bulges outward, and gradually faces the center of the locking piece 58 and the end of the contact portion 66b of the lock piece 66 Has reached.

  The side surface 18 is provided with an inserted portion 68 into which the locking piece 58 is inserted at a portion closer to the extension line of the folding line 38 than the center. The insertion portion 68 is a straight cutting line parallel to the separation line 60, and is provided across the side surface 18 continuously between the crease 26 and the crease 28. The portion of the insertion portion 68 that is continuous with the crease line 28 is a sloped portion 68 a formed by a straight line that is sloped away from the separation line 60. Between the separation line 60 and the insertion part 68, a broken line 70 positioned at right angles to the separation line 60 and the insertion part 68 is provided, and the broken line 70 is slightly inclined relative to the center of the separation line 60. It is located close to the Similarly, at the opposite end of the side surface 18, that is, the portion close to the extension line of the crease 50, the insertion portion 68 and the fold line 70 are similarly symmetrical with an imaginary line parallel to the separation line 60. It is provided in a shape, and the inclined portion 68a is provided to be inclined in a direction away from the end.

  Similarly to the end of the side face 16 adjacent to the creased line 50 of the side face 16, the locking piece 58 is provided by being separated by the separation line 60, similarly to the end adjacent to the creased line 38 of the side face 16, The shape is symmetrical with respect to a virtual line parallel to the line 60, and is continuous with the lid piece 48 via a folding line 72. And the lock piece 66 is formed in the corner surrounded by the side edge 58a and the tip 58b. The lock piece 66 is a triangular protrusion formed of a linear relief portion 66a continuous to the side edge portion 58a and a linear abutment portion 66b intersecting the relief portion 66a.

  Other members are not provided on the side surface 20 adjacent to the side surface 18 and on both ends of the pasted piece 22.

  Next, an example of a method of assembling the packaging box 10 of this embodiment will be described. Here, FIG. 3 is a view of the surface of the box-forming piece 12 of the packaging box 10, and the folding of the box-forming piece 12 is convexly folded, and the reverse side is convexly folded. This is called reverse folding.

  First, the glue 74 is applied to the surface of the glued piece 22. Then, the creased line 28 is folded regularly, and the creased line 24 is folded regularly. As a result, the side surface 14 is glued to the surface of the glued piece 22 with the glue 74 to be in the folded state shown in FIG. 4, and the packaging box 10 is shipped in this folded state.

  Next, in a factory or the like that accommodates and packages the contents, the creased lines 24, 26, 28, 30 are each folded at 90 ° to form square cylinders. Next, one end provided with the lid 48 of the box is assembled to form a bottom.

  First, the locking piece 58 is folded regularly at about 90 ° with respect to the lid piece 48 at the folding line 72. Thus, the locking piece 58 is parallel to the surface of the side surface 18 and intersects with the crease 50. Then, the flap 32 is folded regularly at 90 ° by the folding line 34, and the lid piece 48 is folded regularly at 90 ° by the folding line 50. At this time, the locking piece 58 is positioned outside the side surface 18. As the lid piece 48 is folded at the fold line 50, the locking piece 58 rotates about the fold line 50 and moves along the outer surface of the side surface 18. When the locking piece 58 reaches the insertion portion 68 of the side surface 18, it is inserted into the insertion portion 68 from the corner surrounded by the side edge portion 58 a and the end that was in contact with the separation line 60. The 58 side edges 58 a come out on the back of the side 18. Further, when the creased line 50 is folded, the lock piece 66 is inserted from the insertion portion 68, and the lock piece 66 is provided with the relief part 66a, so it passes through the intersection of the creased line 28 and the inclined part 68a. It becomes possible.

  When the lid piece 48 is normally folded at about 90 ° by the fold line 50 and closed, the contact portion 66b of the lock piece 66 becomes parallel to the inclined portion 68a. The side edge at the end of the side face 18 of the inclined portion 68a is located on the back surface of the locking piece 58, and the side edge at the center of the side 18 is located on the surface of the locking piece 58, and the thickness direction of the inclined portion 68a The end face of the lock piece 66 and the end face in the thickness direction of the lock piece 66 are mutually opposed and engaged to prevent the return. A broken line 70 is formed between the insertion portion 68 and the separation line 60 on the side surface 18, and the broken line 70 is slightly folded back inwards when the locking piece 58 is inserted so as to be easily recessed and inserted. It is provided.

  Then, the insertion piece 52 is normally folded at the fold line 54 and inserted into and locked to the back surface of the side surface 20. Thereby, the bottom of the packaging box 10 is formed. When a force is applied in the direction of causing the lid piece 48, the contact portion 66b of the lock piece 66 does not come in contact with the inclined portion 68a of the insertion portion 68 and is not removed. It occurs. For this reason, even if a force acts in the direction to be opened, it can not be opened without leaving a trace. Further, since the cut line 56 of the lid piece 48 is locked to the side edge portion of the flap 32, the side edge portion of the lid piece 48 on the opposite side to the locking piece 58 also becomes difficult to open.

  Next, the contents are placed inside the box consisting of the assembled side surfaces 14, 16, 18, 20 and the bottom, and the upper surface is formed in the same process as the bottom. First, the locking piece 58 is folded regularly at 90 ° with respect to the lid piece 36 at the folding line 64, the flap 32 is folded regularly at 90 ° at the folding line 34, and the lid piece 36 is made at 90 ° Fold. Then, the locking piece 58 is locked to the insertion portion 68, and the cut line 46 of the lid piece 36 is locked to the flap 32 to form the upper surface.

  Since the bottom and the top can not be opened, separate members such as adhesive tape and glue for sealing are not necessary. In the above-described assembling method, either the bottom surface or the top surface may be assembled first, or may be assembled simultaneously as shown in FIG.

  When the packaging box 10 is opened, a finger is put on the knob portion 40 of the lid piece 36 to raise the lid piece 36, and the fold line 38 is cut, and the lid piece 36 is lifted up and opened.

  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. Moreover, the product can be protected from tampering by providing a high tampering prevention function. The locking piece 66 is a triangular protrusion formed on the edge of the locking piece 58, which is high in strength and can be securely locked without deformation even if the locking piece 66 is small to prevent tampering it can. In particular, even when the box is small, a high falsification preventing effect can be obtained. Even when the lock piece 66 is inserted into the insertion portion 68, the lock piece 66 is not deformed and can be assembled easily and cleanly. In addition, no separate member such as adhesive tape or glue for sealing is required, the assembly process is simple, and the cost is low. The lock piece 66 is covered by the side face 18 so that it can not be seen from the outside, it can not be removed by twisting or the like, and the engagement is secure. The side surface 18 is flush with the pair of locking pieces 58 in the assembled state, and thus does not affect the print design. At the time of opening, it is possible to push up the knob 40 to cut the creased line 38 and lift the cover piece 36 upward for easy opening.

  Next, a second embodiment of the present invention will be described based on FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The packaging box 76 of this embodiment is provided by assembling a box-forming piece 78 formed by punching a single blank sheet made of paper or the like.

  FIG. 8 is a developed view of the box forming piece 78 viewed from the surface, and the box forming piece 78 is formed by connecting side faces 80, 82, 84, 86 in parallel to one another. The side surfaces 80, 82, 84, 86 are rectangles of substantially the same size, and have a width direction longer than the length in the connection direction. On the side edge of the side surface 80, a pasted piece 88 is provided which is glued to the back surface of the side surface 86 in the assembled state of the packaging box 76. The glued pieces 88 and the side surfaces 80, 82, 84, 86 are separated by creases 90, 92, 94, 96.

  Semicircular flaps 98 are provided separated by a crease 100 at a pair of ends of the side surfaces 80 in a direction perpendicular to the connecting direction of the side surfaces. At the end of the side surface 80 opposite to the creased line 100, a first bottom lid piece 102 forming a bottom is provided separated by a creased line 104. The first bottom lid piece 102 is formed in a triangular shape with one side of the crease line 104, and the side continuous to the crease line 90 is a straight line, the side continuous to the crease line 92 is a straight line to the middle, and the tip is more than a straight line. The part is provided with a curve which bulges outward. The distance between the straight line and the curved line of the side of the first bottom lid piece 102 continuous with the creased line 92 and the creased line 104 is approximately equal to the length of the bottom of the packaging box 10 in the assembled state. A substantially triangular bottom glued piece 106 is provided by being separated by a fold line 108 at a straight portion of a side of the first bottom lid piece 102 which is continuous with the fold line 92.

  At an end 82a of the side face 82 adjacent to the fold line 100 of the side face 80, a locking piece 110 is provided by being separated by a separation line 112 at a portion near the center of the end 82a and near the side face 84. The locking piece 110 has a side edge 110a located on the extension of the fold line 94 and a side edge located near the center of the end 82a and parallel to the side edge 110a and having a length shorter than the side edge 110a. It is a deformed rectangle surrounded by a part 110 b, a tip 110 c connecting the tips of the side edges 110 a and 110 b, and a separation line 112. A lock piece 114 is formed at a corner surrounded by the side edge 110b and the tip 110c. The lock piece 114 is a triangular protrusion formed by a linear relief portion 114a which continues and intersects the side edge portion 110b at a predetermined angle, and a linear abutment portion 114b which intersects the relief portion 114a. The apex of the lock piece 114 is substantially at the same height as the extension of the inclined tip 110 c. The portion of the tip portion 110c continuing to the contact portion 114b of the lock piece 114 draws a curved line that bulges outward, and gradually faces the center of the locking piece 110 and the end of the contact portion 114b of the lock piece 114 Has reached. The cut line 112 is formed as a cut line.

  The side surface 82 is provided with an inserted portion 118 into which the locking piece 110 is inserted at a portion closer to the end 82 a than the center. The insertion portion 118 is a straight cutting line parallel to the end portion 82a, is connected to the folding line 94 and is separated from the folding line 92, and is opposite to the folding line 94 of the insertion section 118. The side end is an inclined portion 118a formed by a straight line that is inclined in a direction away from the end 82a. Between the separating line 112 and the inserted portion 118, a broken line 120 positioned at a right angle to the separating line 112 and the inserted portion 118 is provided.

  At the end opposite to the end 82 a of the side surface 82, a trapezoidal bottom flap 122 forming a bottom is provided separated by a fold line 124.

  At the end of the side surface 84 adjacent to the end 82 a of the side surface 82, a substantially square lid piece 126 is provided separated by a crease 128. At the center of the end 126 a of the lid piece 126 opposite to the fold line 128, a knob 130 is provided which bulges slightly in the shape of a circular arc. The side edge portion of the lid piece 126 positioned on the extension line of the folding line 94 is continuous with the side edge portion 110 a of the locking piece 110 via a break line 132 which is a bending line. The break line 132 is formed of a zipper line. At the end of the side surface 84 opposite to the fold line 128, a second bottom lid piece 134 forming the bottom is provided separated by the fold line 136. The second bottom lid piece 134 has the same shape as the first bottom lid piece 102, is formed in a triangular shape with one side of the folding line 136, and the side continuous to the folding line 94 is straight and is continuous to the folding line 96 The side to be moved is a straight line halfway, and the tip portion is provided with a curve which bulges outward from the straight line. The distance between the straight line and the curved line of the side of the second bottom lid piece 134 continuous with the crease line 96 and the crease line 136 is approximately equal to the length of the bottom of the packaging box 76 in the assembled state. A substantially triangular bottom glued piece 138 is provided by being separated by a fold line 140 at a straight portion of the side of the second bottom lid piece 134 that is continuous with the fold line 96.

  At an end 86a of the side surface 86 adjacent to the fold line 128 of the side surface 84, a locking piece 142 having a line symmetrical shape of the locking piece 110 is cut off in the vicinity of the center of the end 86a to a portion near the side surface 84. It is separated by a line 144 and provided. The locking piece 142 has a side edge 142a located on the extension of the fold line 96 and a side edge located near the center of the end 86a and parallel to the side edge 142a and having a length shorter than the side edge 142a. It is a deformed rectangle surrounded by a part 142 b, a tip part 142 c connecting the side edges 142 a and the tips of the side edges 142 b, and a separation line 144. The side edge portion 142a is continuous with the lid piece 126 via a breaking line 143 which is a bending line, and the breaking line 143 is formed by a zipper line. A lock piece 146 is formed at a corner surrounded by the side edge 142b and the tip 142c. The lock piece 146 is a triangular protrusion formed by a linear relief portion 146a continuous to the side edge portion 142b and a linear abutment portion 146b intersecting the relief portion 146a. The apex of the lock piece 146 is approximately at the same height as the extension of the inclined tip 142c. The portion of the tip end portion 142c continuing to the contact portion 146b of the lock piece 146 draws a curved line that bulges outward, and gradually faces the center of the locking piece 142 and the end of the contact portion 146b of the lock piece 146 Has reached. The severing line 144 is formed as a severing line.

  The side surface 86 is provided with an inserted portion 150 into which the locking piece 142 is inserted at a portion closer to the end 86 a than the center. The insertion portion 150 is a straight cutting line parallel to the end portion 86 a, and is provided continuously from the folding line 96 and separated from the side edge opposite to the folding line 96, and the insertion portion 150 The end opposite to the fold line 96 is an inclined portion 150a formed in a straight line which is inclined in a direction away from the end 86a. Between the separation line 144 and the insertion portion 150, a broken line 152 positioned at a right angle to the separation line 144 and the insertion portion 150 is provided.

  At the end of the side 86 opposite to the end 86 a, a trapezoidal bottom flap 154 forming a bottom is provided separated by a fold line 156.

  Next, an example of the method of assembling the packaging box 76 of this embodiment will be described. Here, FIG. 8 is a view of the surface of the box-forming piece 78, and the folding of the box-forming piece 78 is convex when the surface is convex, and the folding is reverse when the back is convex. It is called.

  First, the creased lines 104, 124, 136, 156 are folded in a normal direction, the creased lines 108, 140 are folded in the reverse direction, and the glues 158, 160 are applied to the back of the bottom glued pieces 106, 138. Then, the glue 162 is applied to the surface of the glued piece 88. The creased line 92 is folded regularly, and the creased line 96 is folded regularly. As a result, the surface of the glued piece 88 is glued to the back of the side 86 with glue 162, the back of the bottom glued piece 106 is glued to the surface of the bottom flap 122 with glue 158, and the back of the bottom glued piece 138 is bottomed with glue 160. It is glued to the surface of the flap 154. As a result, the box forming piece 78 is folded, and the packaging box 76 is shipped in the folded state.

  Next, in a factory or the like that accommodates and packages the contents, the creases 90, 92, 94, 96 are each folded at 90 ° to form square boxes. At this time, the bottom glued piece 106 of the first bottom lid piece 102 is glued to the bottom flap 122, and the bottom glued piece 138 of the second bottom lid piece 134 is glued to the bottom flap 154, so it is folded in half. The creases 104, 124, 136, 156 are automatically triggered to open approximately 90 ° to form the bottom. The portions of the curved lines bulging out of the first bottom lid piece 102 and the second bottom lid piece 134 come into contact with each other during assembly while overcoming while being elastically deformed, and when assembled, the elastic deformation is restored and locked together, Maintain the shape of the bottom of the box.

  The contents are then placed inside the box consisting of the assembled sides 80, 82, 84, 86 and the bottom to form the top. First, the locking pieces 110 and 142 are folded regularly at about 90 ° with respect to the lid piece 126 at breaking lines 132 and 143. Thus, the locking pieces 110 and 142 are parallel to the surfaces of the side surfaces 82 and 86 and intersect the crease 128. Then, the flap 98 is folded regularly at 90 ° at the folding line 100, and the lid piece 126 is folded regularly at 90 ° at the folding line 128. As the cover piece 126 is folded at the fold line 128, the locking pieces 110 and 142 rotate about the fold line 128 and move along the surfaces of the side faces 82 and 86, respectively. When the inserted portions 118 and 150 of the side surfaces 82 and 86 are reached, the inserted portions 118 and 150 are connected to the side edge portions 110 b and 142 b and the corners surrounded by the ends that were in contact with the separation lines 112 and 144. It is inserted and comes out to the back of the side 82,86. Further, when the folding line 128 is folded, the lock pieces 114 and 146 are inserted from the insertion parts 118 and 150, and the lock pieces 114 and 146 are provided with the relief parts 114a and 146a, so the insertion parts 118, The tip end of the inclined portion 118a 150a of 150 can be passed. When the lid piece 126 is normally folded at about 90 ° by the fold line 128 and closed, the contact parts 114b and 146b of the lock pieces 114 and 146 become parallel to the inclined part 118a and the inclined part 150a, respectively. The side edges of the inclined portions 118a and 150a on the side of the end portions 82a and 86a are respectively located on the back surfaces of the locking pieces 110 and 142, and the opposite side edges of the inclined portions 118a and 150a are the locking pieces 110, The end faces in the thickness direction of the inclined portions 118a and 150a and the end faces in the thickness direction of the lock pieces 114 and 146 are opposed to each other and locked so as to prevent return to the original state. The broken lines 120 and 152 are respectively provided between the insertion parts 118 and 150 and the separation lines 112 and 144, and when the locking pieces 110 and 142 are inserted, they are slightly folded back inward to be easily dented and inserted. Thus, the lid piece 126 is closed and locked to the end by the locking pieces 110 and 142, and the upper surface of the box forming piece 78 is formed. When a force is applied in the direction to cause the lid piece 126, the contact parts 114b and 146b of the lock pieces 114 and 146 do not contact and come off the inclined parts 118a and 150a of the insertion parts 118 and 150, respectively. When pulled out, the locking pieces 110 and 142 are damaged. For this reason, even if a force acts in the direction to be opened, it can not be opened without leaving a trace. Since the upper surface can not be opened, a separate member such as an adhesive tape or a glue for sealing is not necessary.

  When the packaging box 76 is opened, a finger is put on the knob portion 130 of the lid piece 126 to bring up the lid piece 126, the break lines 132 and 143 are cut, and the lid piece 126 is lifted up and opened.

  According to the packaging box 76 of this embodiment, the same effect as that of the above-described embodiment is obtained, and the locking pieces 110 and 142 are continuous on both sides of the lid piece 126, and the receiving portions 118 are respectively inserted. , 150, so there is a higher falsification prevention effect. The locking pieces 110, 142 have a width about half that of the side surfaces 82, 86 and are relatively small with respect to the side surfaces 82, 86, and a compact locking to the large packaging box 76 for holding large containers. The pieces 110 and 142 can be provided to obtain a falsification preventing effect. The bottom is assembled with one touch, and the assembly is easy.

  In addition, this invention is not limited to the said embodiment, The magnitude | size and shape of each side, the structure of a bottom part, the shape and number of a flap, etc. can be changed freely. The lid piece may be provided on any side surface, as long as the insertion portion is provided on the side surface facing the locking piece continuous to the lid piece. The shapes of the lock piece and the insertion portion may be other than those described above, as long as they can be reliably engaged when the engagement piece is inserted into the insertion portion. In addition, a part of the side surface may be formed to be large, or it may be a display piece that protrudes to the outside of the packaging box when assembled. The opening line does not have to be provided between the lid piece and the locking piece or between the lid piece and the side surface, and the opening method may be freely changed, for example, an opening port may be provided in the middle of the side surface. It is possible. The material is freely changeable other than paper, and may be a resin material such as PP.

Reference Signs List 10, 76 packaging box 12, 78 box forming piece 14, 16, 18, 20, 80, 82, 84, 86 side face 36, 48, 126 lid piece 38, 128 fold crease line 58, 110, 142 locking piece 58b , 110c, 142c tip portion 64 bending line 66, 114, 146 lock pieces 66a, 114a, 146a relief portions 66b, 114b, 146b contact portions 68, 118, 150 inserted portions 68a, 118a, 150a inclined portions 70, 120 , 152 broken line 132, 143 broken line

Claims (3)

It consists of a box forming piece of a single blank sheet, and the box forming piece is connected to a side surface connected in parallel to each other and assembled to a cylinder, and one of the side surfaces connected via a folding line to the folding line A cover piece which is bent at the same time to close the opening of the side cylinder, a locking piece which is connected to a side edge of the cover piece crossing the folding line through a folding line, and the locking piece A lock piece integrally formed at a front end of the cover, and an insertion portion formed on the side surface adjacent to the side surface on which the lid piece is provided and located in the vicinity of the locking piece;
The lock piece is a projection having a relief portion and an abutment portion, and the insertion portion is provided at a cutting line intersecting the rotation direction of the locking piece, and a predetermined part of the cutting line is provided. An inclined part is provided at an angle of
When the lid piece is bent at the folding line in the assembled state of the box forming piece and the opening of the cylinder is closed, the locking piece is bent at the bending line and the insertion portion is inserted. Is parallel to the side face provided with and intersects with the crease, and as the cover piece is bent at the crease, the locking piece rotates about the crease, and the engagement The tip of the stop piece is inserted into the insertion portion together with the lock piece,
When the locking piece is inserted into the receiving portion together with the lock piece, the relief portion of the lock piece intersects the inclined portion, and when the lid piece is closed, the contact portion of the lock piece Corresponds to the inclined portion, and the opening side of the side surface is located on the back surface side of the locking piece across the insertion portion, and the center side of the side surface is located on the front surface side of the locking piece And the end face of the inclined portion and the end face of the lock piece are engaged with each other so as to be difficult to pull out.   The side surface provided with the insertion portion is provided with a fold line extending in a direction crossing the insertion portion and approaching the locking piece at a portion near the insertion portion. The packaging box according to item 1. Each of the locking pieces is provided on a pair of side edges intersecting the folding line of the lid piece, and each of the pair of side surfaces adjacent to the side surface on which the lid piece is provided is shifted The packaging box according to claim 1, further comprising an insertion portion.

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