JP6199219B2 - Locking structure for packaging boxes and paper products - Google Patents

Description

  The present invention relates to a packaging box and a paper product lock structure.

  The packaging box includes an outer peripheral wall having a pair of side walls arranged opposite to each other and a pair of end walls arranged opposite to each other adjacent to the side walls. The first side flap is connected to the side wall on the long side so as to abut against each other by bending, and the end wall on the short side has the second dimension so that a predetermined gap is formed between the ends of each side by bending. Flap is provided continuously, and the opening end of the outer peripheral wall is sealed by these flaps. For example, a method is generally employed in which the first flap is folded after the second flap is folded, and the tips of the first flaps that are in contact with each other are adhered with an adhesive tape. However, since this sealing method requires an adhesive tape, the cost is increased, and the adhesive tape needs to be separated and discarded after opening, so that the workability is poor.

  Patent Documents 1 and 2 describe a packaging box that can be sealed without using a fixing means such as an adhesive tape. In these packaging boxes, an insertion hole communicating with the inside of the first flap is formed, and an insertion portion is formed in the second flap. Then, after the first flap is bent first, the second flap is bent, and the insertion portion is inserted into the inner surface side of the inner flap through the insertion hole and sealed.

  In the packaging box of Patent Document 1, a protrusion protruding in a direction intersecting the insertion direction is formed in the insertion part. The insertion hole should intersect the protrusion so that the lateral width on the rear side in the insertion direction is wider than the lateral width of the insertion part including the protrusion, and the lateral width on the front side in the insertion direction is narrower than the lateral width of the insertion part. Inclined edges extending at an angle. In this packaging box, when a force in the pulling direction is applied to the insertion portion in the sealed state, the inclined edge and the protrusion interfere with each other, and therefore it is possible to prevent the insertion portion from being pulled out from the insertion hole and opened.

  As for the packaging box of patent document 2, the protrusion which protrudes in the direction which cross | intersects the insertion direction is formed in the insertion part. The lateral width of the insertion portion including the projecting piece is formed larger than the lateral width of the insertion hole. The protruding piece is bent so as to overlap the insertion portion, and is inserted into the insertion hole together with the insertion portion. The inserted projecting piece is elastically restored by the rigidity (waist) of the corrugated cardboard sheet on the inner surface side of the inner flap, and is locked to the edge of the insertion hole. As a result, the insertion portion can be prevented from being pulled out of the insertion hole and opened.

  Since the packaging box of Patent Document 1 can be repeatedly sealed and opened, it is possible to reconfirm the articles accommodated therein. When the packaging box of Patent Document 2 is opened by pulling out the insertion portion from the insertion hole, the protruding piece is broken from the insertion portion, so that it is possible to determine whether or not another person has opened it. It is extremely effective to use these packaging boxes properly according to the purpose. However, since the packaging box of Patent Document 1 that can be repeatedly opened and closed and the packaging box of Patent Document 2 that cannot be opened unless it is broken are contradictory purposes, a packaging box having both functions is not provided.

JP 2005-8221 A Japanese Patent Laid-Open No. 2003-20027

  It is an object of the present invention to provide a packaging box and a paper product lock structure capable of selecting a temporarily sealed state that can be repeatedly opened and closed and a sealed state that cannot be opened unless it is broken.

In order to solve the above-mentioned problem, the packaging box of the present invention has an inner flap and an outer flap connected to the opening end of the outer peripheral wall, and the outer flap is arranged on the outer surface side of the inner flap, thereby opening the outer peripheral wall. a packaging box for sealing the ends, the said flap is provided to be inserted portion which communicates with the interior, bayonet projections in the outer flap to be inserted into the inner surface of the inner flap from the object insertion unit provided, the insertion projection is a direction in which the comprises a locking piece extending in the inserting direction into the receptacle portion, perpendicular to the insertion direction of the insertion projection including the locking piece Is formed to be equal to or less than the width of the inserted portion orthogonal to the insertion direction. The locking piece is defined by a fold line extending along the insertion direction, and a break line formed of a plurality of cutting lines and extending from an end of the fold line in a direction intersecting the insertion direction, and is broken along the line, said at a folded state along the folding lines in Rukoto inserted into the insertion portion, lockable in the edge of the front Symbol the insertion portion with respect to the insertion projection Yes, it cannot be locked to the edge of the inserted portion by being inserted into the inserted portion in a non-bent state without being broken along the breaking line .

  The inserted portion has a continuous portion provided on the rear side in the insertion direction of the insertion protrusion, and a cutting portion provided on the front side in the insertion direction so as to extend to both ends of the continuous portion, and the cutting The locking piece is locked to the cutting edge by the portion. In addition, a to-be-inserted part may be comprised by the hole by punching, and a locking piece may be locked to the edge of the insertion direction rear side of an insertion protrusion.

  Specifically, a pair of side walls disposed opposite to each other, a pair of end walls disposed adjacent to each of the side walls, a pair of inner flaps connected to an opening end of each side wall, A packaging box including a pair of outer flaps connected to the opening end of the end wall, wherein the outer flaps are arranged so as to intersect each other on the outer surface side of the inner flaps, and the opening ends are sealed. The insertion portion is provided on the outer flap, and the insertion protrusion is provided on the outer flap. In addition, the paper product lock structure includes a first wall (inner flap) provided with an inserted portion communicating with the inside, and an outer surface side of the first wall, and the first wall extends from the inserted portion. 2nd wall (outside flap) provided with the insertion protrusion inserted in the inner surface side, and the inserted portion and the insertion protrusion are configured as described above.

  When the packaging box is inserted into the insertion portion without bending the locking piece with respect to the insertion protrusion, the opening end of the outer peripheral wall is closed in a temporarily sealed state. In the temporarily sealed state, the non-folded locking piece is positioned in a plane with respect to the insertion protrusion, and thus is not locked to the edge of the insertion portion. Therefore, the open end of the outer peripheral wall can be opened by operating the outer flap in the direction opposite to the insertion direction and pulling out the insertion protrusion together with the locking piece. Therefore, the opening end of the outer peripheral wall can be repeatedly opened and closed by setting the locking piece to the non-bent state.

  Further, when the locking pieces are bent with respect to the insertion protrusion and are inserted into the insertion portion in a superimposed state, they are closed in a sealed state that cannot be opened unless the outer flap is broken. In this sealed state, the latching piece in the bent state is in a state of overlapping or projecting on the inner surface side of the insertion protrusion, so that it is locked to the edge of the insertion portion. Therefore, even if the outer flap is operated in the direction opposite to the insertion direction, the insertion protrusion cannot be easily pulled out. However, by forcibly pulling, the outer flap including the locking piece and the insertion protrusion or the inner flap including the inserted portion is broken, and the open end of the outer peripheral wall can be opened. Therefore, it is possible to determine whether or not another person has opened the package illegally by checking the presence or absence of the breakage.

Furthermore, the locking piece has a folding line extending along the insertion direction, which is defined by the broken lines extending in a direction crossing the insertion direction from an end portion of the folding line, broken along the break line By not doing, the non-bending state which does not bend a locking piece with respect to an insertion protrusion can be maintained. Moreover, a latching piece can be bend | folded with respect to an insertion protrusion by fracture | rupturing along a fracture line.

The outer flap has an insertion protrusion fracture portion that separates the insertion protrusion. Specifically, the outer flap includes an auxiliary folding line extending in a direction orthogonal to the insertion direction before the insertion projection, and the insertion projection fracture part is formed of the auxiliary folding curve. It is provided from the edge part to the intersection of the folding line and the breaking line. If it does in this way, the opening workability | operativity in a sealed state can be improved. Moreover, the presence or absence of unauthorized opening can be determined easily and reliably depending on whether or not the plug protrusion rupture portion is broken .
Moreover, it is preferable to provide the outer flap with a pressing portion that protrudes in the same direction as the insertion protrusion and is disposed on the outer surface side of the inner flap. In this way, since the insertion protrusion is located on the inner surface side of the inner flap and the pressing portion is located on the outer surface side of the inner flap, the temporary sealing state and the sealing state can be achieved by sandwiching the inner flap from the inner and outer surfaces. Can be reliably maintained.

  The packaging box using the lock structure of the present invention can open and close the opening end of the outer peripheral wall repeatedly because the lateral width of the insertion protrusion including the non-folded locking piece is equal to or less than the lateral width of the inserted portion. Also, the outer flap or the inner flap must be broken by inserting the locking piece into the insertion portion in a bent state with respect to the insertion protrusion, and locking the locking piece to the edge of the insertion portion. Can not be opened. Therefore, it can be determined whether or not the tampering has been performed based on the presence or absence of breakage.

The perspective view which shows the sealing state of the packaging box of 1st Embodiment of this invention. The perspective view which shows the state which obstruct | occluded the lower end of the packaging box and open | released the upper end. (A) is a perspective view which shows one process at the time of setting it as a temporarily sealed state, (B) is sectional drawing which looked at the temporarily sealed state from the downward direction. (A) is a perspective view which shows 1 process at the time of setting it as a sealing state, (B) is sectional drawing which looked at the sealing state from the downward direction. The perspective view which shows the state which opened the packaging box of the sealed state. The top view which shows the blank of a packaging box. The elements on larger scale of FIG. The partial enlarged view of the blank of the packaging box of 2nd Embodiment. The partial enlarged view of the blank of the packaging box of 3rd Embodiment. The partial enlarged view of the blank of the packaging box of 4th Embodiment. The partial enlarged view of the blank of the packaging box of 5th Embodiment. The perspective view of the packaging box of 6th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 shows a packaging box 10 using the lock structure of the first embodiment according to the present invention. The packaging box 10 includes an outer peripheral wall having a pair of side walls 11A and 11B and end walls 12A and 12B, and upper inner flaps 15A and 15B and upper outer flaps 16A and 16B connected to an upper opening end of the outer peripheral wall. An upper lid wall and a lower lid wall (see FIG. 2) composed of lower outer flaps 17A and 17B and lower inner flaps 18A and 18B connected to the lower opening end of the outer peripheral wall are provided. The packaging box 10 can be temporarily sealed so that it can be repeatedly opened and closed, and when it is finally sealed, it cannot be opened unless it is broken, so that it can be opened on the upper inner flaps (first walls) 15A and 15B. Are provided, and the insertion protrusions 24 are provided on the upper outer flaps (second walls) 16A and 16B.

  The packaging box 10 is formed by punching a cardboard sheet made of paper as a single blank shown in FIG. 6 by using flexogluer, which is a general-purpose machine capable of mass production at low cost. In this flexogluer, a partial mold for forming the inserted portion 21 and the insertion protrusion 24 is used. The corrugated board sheet has a configuration in which wavy shin is disposed between the front liner and the back liner. In the following description, terms indicating a specific direction or position (for example, terms including “up”, “down”, “side”, “end”, “top”, “bottom”) are used as necessary. These terms are used for easy understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of these terms.

  As shown in FIG. 6, the blank of the packaging box 10 is provided so that the side walls 11A and 11B and the end walls 12A and 12B constituting the outer peripheral wall are continuous in the lateral direction. These are formed in a rectangular shape, and are arranged in the order of the side wall 11A, the end wall 12A, the side wall 11B, and the end wall 12B from the left side. In the sealed state, the side walls 11A and 11B are arranged to face each other, and the end walls 12A and 12B are arranged to face each other adjacent to the side walls 11A and 11B. Adhesive margin wall 13 for adhering to the edge of end wall 12B located in the right end is connected to side wall 11A located in the left end. At the boundary portions of these walls 11A, 11B, 12A, 12B, and 13, there are provided first folding lines 14 made of general-purpose ruled lines formed by ruled so as to compress the thickness from the back liner side. Yes.

  Upper inner flaps (inner flaps) 15A, 15B are connected to the upper edges of the side walls 11A, 11B, and upper outer flaps (outer flaps) 16A, 16B are connected to the upper edges of the end walls 12A, 12B. . Lower outer flaps 17A and 17B are connected to the lower edges of the side walls 11A and 11B, and lower inner flaps 18A and 18B are connected to the lower edges of the end walls 12A and 12B. A second folding line (open end) 19 made of a general ruled line is provided at each boundary portion of the upper flaps 15A, 15B, 16A, 16B and the walls 11A, 11B, 12A, 12B so as to form a straight line. . Similarly, a third folding line 20 made of a general ruled line is provided on each boundary portion of the lower flaps 17A, 17B, 18A, 18B and the walls 11A, 11B, 12A, 12B so as to form a straight line. .

  The upper inner flaps 15A and 15B and the lower outer flaps 17A and 17B are formed to have a size that abuts against the tips of the upper inner flaps 15B and 15A and the lower outer flaps 17B and 17A that face each other in the sealed state. The upper outer flaps 16A and 16B and the lower inner flaps 18A and 18B are formed with dimensions that allow a predetermined gap to be formed between the tips of each other in the sealed state. And flap 15A, 15B-18A, 18B of this embodiment is formed so that it may protrude from each wall 11A, 11B, 12A, 12B by the same dimension in the vertical direction.

  The lower opening end of the packaging box 10 of the present embodiment is arranged by folding the lower outer flaps 17A, 17B on the long side on the outer surface side of the lower inner flaps 18A, 18B on the short side, such as an adhesive tape. Sealed by fixing means. Further, the upper open end of the packaging box 10 is formed by bending the upper outer flaps 16A and 16B on the short side on the outer surface side of the upper inner flaps 15A and 15B on the long side, and using a fixing means such as an adhesive tape. Not sealed by an interlock structure. The interlock structure of the upper flaps 15A, 15B, 16A, and 16B includes a inserted portion 21 formed on the upper inner flaps 15A and 15B, and an insertion protrusion 24 formed on the upper outer flaps 16A and 16B. A locking piece 25 that locks to the edge of the inserted portion 21 is formed in the insertion protrusion 24.

  As shown in FIGS. 6 and 7, the inserted portions 21 are provided in the overlapping regions on both sides of the upper inner flaps 15A and 15B where the upper outer flaps 16A and 16B adjacent in the sealed state overlap each other. At the time of sealing, the insertion protrusion 24 is inserted into the insertion portion 21 from both sides of the upper inner flaps 15A and 15B toward the center in the width direction of the upper inner flaps 15A and 15B. Moreover, the insertion part 21 is formed in the rectangular shape extended in the direction orthogonal to an insertion direction toward the front end side from the base end side of upper inner flap 15A, 15B continuing to side wall 11A, 11B.

  The inserted portion 21 of the present embodiment has a cut-and-raised structure having a continuous portion 22 provided on the rear side in the insertion direction and a cutting portion 23 provided on the front side in the insertion direction so as to extend toward both ends of the continuous portion 22. is there. The continuous portion 22 is provided with general-purpose ruled lines formed by putting rules on the back liner side. The cutting part 23 consists of a cutting line formed by inserting a blade from the back liner side to the front liner. A pair of first cutting lines 23a, 23a extending from both ends of the continuous portion 22 toward the center in the width direction of the upper inner flaps 15A, 15B, and a second cutting line extending between the center-side ends of the first cutting lines 23a, 23a. 23b. A hole communicating with the inside is formed by pushing inward about the continuous portion 22. In the inserted portion 21 defined by the continuous portion 22 and the cutting portion 23, the cutting edge of the cut and raised piece by the second cutting line 23 b becomes the locked edge to which the locking piece 25 is locked.

  The insertion protrusion 24 is inserted into the inner surface side through the inserted portion 21 from the outer surface side of the upper inner flaps 15A and 15B during sealing, and maintains the sealed state. The insertion protrusion 24 protrudes in the longitudinal direction outward from the base end side of the upper outer flaps 16A and 16B continuous to the end walls 12A and 12B on both sides of the upper outer flaps 16A and 16B. This protruding direction is the direction to be inserted into the plugged portion 21 at the time of sealing. The lateral width W <b> 1 in the direction orthogonal to the insertion direction of each insertion protrusion 24, including the non-folded locking piece 25 formed in the insertion protrusion 24, is the insertion direction of the insertion part 21. Is set to a width W2 or less in the direction orthogonal to

  The locking piece 25 is provided on the center side in the width direction of the upper outer flaps 16 </ b> A and 16 </ b> B that is between the pair of insertion protrusions 24 and 24. The locking piece 25 is locked to the locked edge of the plugged portion 21 by being inserted into the plugged portion 21 in a bent state superimposed on the inner surface side of the plugging projection 24. The locking piece 25 is provided with a folding line 26 extending along the insertion direction and a breaking line 27 extending in a direction intersecting the insertion direction on the insertion protrusion 24, whereby the lateral width W <b> 1 of the insertion protrusion 24. It is provided inside. The folding line 26 is composed of a lead ruled with a cutting line provided at a predetermined interval on a general ruled line extending in parallel along the insertion direction of the insertion protrusion 24, and from the proximal end to the distal end of the insertion protrusion 24. It is provided over. The rupture line 27 is a cutting line provided in a perforated manner with a predetermined interval, and is provided from the base side end of the folding line 26 to the side edge on the center side. By breaking the base of the insertion protrusion 24 along the breaking line 27, the locking piece 25 can be bent along the folding line 26. The formation position of the folding line 26 is set so that the locking piece 25 does not protrude from the side edge of the insertion protrusion 24 in this bent state.

  The dimension S1 along the insertion direction from the second folding line 19 that is the base of the upper outer flaps 16A and 16B to the tip of the insertion protrusion 24 is the width of the side walls 11A and 11B and the end walls 12A and 12B in the blank state. It is larger than the dimension S2 along the insertion direction from the first folding line 14 at the boundary (from the base portion of the upper outer flaps 16A and 16B in the sealed state) to the front edge of the insertion portion 21 in the insertion direction. Therefore, the upper outer flaps 16 </ b> A and 16 </ b> B are general-purpose extending in a direction orthogonal to the insertion direction of the insertion protrusion 24 in order to improve workability when the insertion protrusion 24 is inserted into the insertion portion 21. An auxiliary folding curve 28 made of ruled lines is provided. By bending the upper outer flaps 16 </ b> A and 16 </ b> B along the auxiliary folding curve 28 during sealing, the tip of the insertion protrusion 24 can be disposed in the insertion portion 21.

  Further, the dimension S3 along the insertion direction from the base portion of the upper outer flaps 16A and 16B to the base portion of the insertion protrusion 24 is set to be larger than the dimension S2 along the insertion direction of the inserted portion 21. Thereby, when the insertion piece 24 is inserted into the insertion portion 21 with the engagement piece 25 in the bent state, the engagement piece 25 can be reliably engaged with the engagement edge of the insertion portion 21. It is set as follows. In addition, both sides of the upper outer flaps 16 </ b> A and 16 </ b> B are inclined edges that are punched from both ends of the auxiliary folding curve 28 to the base outer edge of the insertion protrusion 24.

  The upper outer flaps 16 </ b> A and 16 </ b> B are formed with an insertion protrusion breaking portion 29 for separating the insertion protrusion 24. The insertion protrusion rupture 29 is provided so as to extend from the end of the auxiliary fold curve 28 (side edges of the upper outer flaps 16A and 16B) to the intersection of the fold curve 26 and the break line 27. The insertion protrusion rupture portion 29 of the present embodiment includes a plurality of cutting lines 29a extending in a perforation from the end portion of the auxiliary folding curve 28 toward the corner portion of the locking piece 25, and the distal end side of each cutting line 29a. It is comprised by the piece zipper provided with the cutting line 29b for a guide extended inward in a horizontal direction from an edge part. The upper flaps 15A, 15B, 16A, and 16B are broken by breaking the upper outer flaps 16A and 16B along the insertion protrusion breaking portion 29 in a sealed state where the locking piece 25 is locked to the insertion portion 21. Can be opened. Further, it can be determined whether or not another person has unsuccessfully opened the bag depending on whether or not the insertion protrusion rupture portion 29 is broken.

  On the upper outer flaps 16 </ b> A and 16 </ b> B, a pressing portion 30 is projected between the pair of insertion protrusions 24 and 24. This pressing part 30 protrudes in the same direction as the insertion protrusion 24, and is arranged on the outer surface side of the upper inner flaps 15A and 15B in a sealed state. A notch 31 for opening operation is provided at the tip of the pressing part 30 so as to form a semicircular shape.

  The blank of the packaging box 10 bends the side wall 11A with respect to the end wall 12A, bends the end wall 12B with respect to the side wall 11B, and bonds the overlapping adhesive margin wall 13 and end wall 12B to, for example, a vinyl acetate emulsion system. Adhere with an agent. And it ships in this folded state, for example, is used as a packaging box at the time of moving.

  As shown in FIG. 2, when the packaging box 10 is used, the folded side walls 11A and 11B and end walls 12A and 12B are opened in a rectangular shape in plan view. Next, the lower inner flaps 18A and 18B are folded inward, the lower outer flaps 17A and 17B are folded inward, and the tips of the lower outer flaps 17A and 17B are attached with an adhesive tape. Then, a load is put in from the opened upper opening end on the upper flaps 15A, 15B, 16A, 16B side, and the upper opening end is closed.

  When moving, it is often stored separately in different packaging boxes 10 for each type of luggage. You may also want to add luggage later. In such a case, the locking piece 25 is in an unbent state with respect to the insertion protrusion 24 and is in a temporarily sealed state in which the opening end can be repeatedly opened and closed. Further, when all the desired luggage is accommodated or when the inside is filled with luggage, the final sealed state that cannot be opened unless the upper outer flaps 16A and 16B are broken is set.

  When the packaging box 10 is temporarily sealed, as shown in FIG. 3A, the upper inner flaps 15A and 15B are bent inward to close the upper opening end. Thereafter, the upper outer flaps 16A and 16B are bent along the auxiliary folding curve 28 without bending the locking piece 25 with respect to the insertion protrusion 24 (without breaking along the breaking line 27). The tip of the portion 24 is brought into contact with the inserted portion 21 of the upper inner flaps 15A, 15B. Thereafter, by pushing the ridge portion by the auxiliary folding curve 28 in the downward insertion direction, as shown in FIGS. 1 and 3B, the insertion protrusion 24 is moved from the inserted portion 21 to the upper inner flaps 15A and 15B. It can be set as the temporary sealing state inserted in the inner surface side.

  In this temporarily sealed state, the upper inner flaps 15 </ b> A and 15 </ b> B are sandwiched between the pair of insertion protrusions 24 and 24 and the pressing portion 30. Further, the insertion protrusion 24 is sandwiched between the upper inner flaps 15A and 15B by the restoring force due to the rigidity (waist) of the cut and raised piece in the inserted portion 21 having the cut and raised structure. Further, due to the setting of the dimension S2 of the inserted portion 21 and the setting of the dimension S3 of the insertion protrusion 24 and the pressing force due to the rigidity of the upper outer flaps 16A and 16B, the upper outer flaps 16A and 16B are moved in the insertion direction. The extending force acts. Therefore, the temporary sealing state which opposes the force opposite to the insertion direction and closes the upper opening ends of the side walls 11A and 11B and the end walls 12A and 12B can be reliably maintained. Further, since the locking piece 25 is not broken along the breaking line 27, the locking piece 25 is maintained in a flat shape (non-bent state) where the locking piece 25 is not bent with respect to the insertion protrusion 24. Therefore, the locking piece 25 is not locked to the locked edge of the plugged portion 21.

  When opening the packaging box 10 in the temporarily sealed state, put a finger on the notch 31 of the pressing portion 30 and press the upper outer flaps 16A and 16B in the direction opposite to the insertion direction along the upper inner flaps 15A and 15B. (Manipulate. Thereby, the insertion protrusion 24 is pulled out from the insertion portion 21 together with the locking piece 25 positioned in a planar shape. As a result, as shown in FIG. 2, the engagement of the upper inner flaps 15A and 15B and the upper outer flaps 16A and 16B is released, and the open ends of the side walls 11A and 11B and the end walls 12A and 12B can be opened.

  When the packaging box 10 is finally sealed, as shown in FIG. 4A, after folding the upper inner flaps 15A and 15B, the locking piece 25 is bent with respect to the insertion protrusion 24, and the insertion protrusion The locking piece 25 is superimposed on the inner surface side of the portion 24. In the bent state of the locking piece 25, the upper outer flaps 16A and 16B are bent along the auxiliary folding curve 28, and the tips of the insertion protrusions 24 are brought into contact with the inserted portions 21 of the upper inner flaps 15A and 15B. After that, by pushing the ridge portion of the auxiliary folding curve 28 in the downward insertion direction, as shown in FIGS. 1 and 4B, the insertion protrusion 24 is moved from the inserted portion 21 to the upper inner flaps 15A and 15B. It can be set as the sealed state inserted in the inner surface side.

  As shown in FIG. 1, there is no difference between the temporarily sealed state and the sealed state as viewed from the outside. However, as shown in FIGS. 3B and 4B, when viewed from the inside, it differs depending on whether or not the locking piece 25 is locked to the edge of the inserted portion 21. Moreover, the state of the locking piece 25 in the sealed state varies depending on the amount of luggage accommodated therein. That is, when the load is stored in a full state and the locking piece 25 hits the load, as shown in FIG. 4B, the state of being superimposed on the inner surface side of the insertion protrusion 24 is maintained. In this state, since the locking piece 25 is flush with the cut and raised piece of the plugged portion 21, the rear edge of the locking piece 25 in the insertion direction is the locked edge of the plugged portion 21. Line contact with and lock. Further, when the stored luggage is small, the locking piece 25 acts so as to return to a flat shape by a restoring force due to rigidity, but does not return to a completely flat state. Therefore, the rear edge of the locking piece 25 in the insertion direction is brought into point contact with the locked edge of the plugged portion 21 and locked.

  In the sealed packaging box 10, the upper inner flaps 15 </ b> A and 15 </ b> B are sandwiched between the pair of insertion protrusions 24 and 24 and the pressing portion 30, as in the case of the temporary sealed state. Further, the insertion protrusion 24 is sandwiched between the upper inner flaps 15 </ b> A and 15 </ b> B by the cut and raised pieces in the inserted portion 21. Further, a force extending in the insertion direction acts on the upper outer flaps 16A and 16B. Therefore, the sealed state in which the upper open end of the packaging box 10 is closed can be reliably maintained. In this sealed state, since the locking piece 25 is locked to the inserted portion 21, even if the upper outer flaps 16A and 16B are operated in the direction opposite to the insertion direction, the insertion protrusion 24 is not moved. It cannot be pulled out.

  When opening the sealed packaging box 10, put a finger on the notch 31 of the pressing portion 30, and center the second folding curve 19 at the boundary with the auxiliary folding curve 28 or the end walls 12 </ b> A, 12 </ b> B. The flaps 16A and 16B are operated to open outward. As a result, as shown in FIG. 5, the upper outer flaps 16 </ b> A and 16 </ b> B are broken along the insertion protrusion breaking portion 29. As a result, the insertion protrusion 24 remains in a state of being inserted into the insertion portion 21, and the upper outer flaps 16A and 16B excluding the insertion protrusion 24 are released from engagement with the upper inner flaps 15A and 15B. Therefore, the open ends of the side walls 11A, 11B and the end walls 12A, 12B sealed by the upper flaps 15A, 15B, 16A, 16B can be opened.

  As described above, the packaging box 10 of the present invention is configured to temporarily open and close the upper flaps 15 </ b> A, 15 </ b> B, 16 </ b> A, 16 </ b> B by setting the locking piece 25 to the non-folded state with respect to the insertion protrusion 24. State. Moreover, by making the latching piece 25 bend with respect to the insertion protrusion 24, it is possible to obtain a sealed state that cannot be opened unless the upper outer flaps 16A and 16B are broken. Therefore, it is possible to realize a packaging box 10 that can be repeatedly opened and closed, cannot be opened unless it is broken, and has contradictory functions, and can be selected and sealed as desired.

  Moreover, in this embodiment, since the insertion protrusion breaking part 29 is provided in the upper outer flaps 16A and 16B, the upper flaps 15A, 15B, 16A and 16B in the sealed state can be relatively easily broken and opened. Can do. Further, it can be determined whether or not another person other than himself has opened the packaging box 10 illegally depending on whether or not the insertion protrusion rupture portion 29 is broken.

(Second Embodiment)
FIG. 8 shows the packaging box 10 of the second embodiment. This packaging box 10 is different from the first embodiment in that a locking piece 25 is provided on the outer side in the width direction of the pair of insertion protrusions 24, 24. Further, the insertion protrusion rupture portion 29 is provided so as to extend from the end of the auxiliary folding curve 28 to the base portion on the center side in the width direction of the insertion protrusion 24. In the second embodiment, it is possible to obtain the same operation and effect as the first embodiment.

(Third embodiment)
FIG. 9 shows a packaging box 10 of the third embodiment. This packaging box 10 is different from the first embodiment in that the locking piece 25 is provided in the insertion protrusion 24 with a raised structure. Specifically, it has a folding line 26 extending along the insertion direction of the insertion protrusion 24 and a breaking line 27 extending toward both ends of the folding line 26. The break line 27 includes a pair of first break portions 27a and 27a extending in a direction perpendicular to the insertion direction from both ends of the folding line 26, and a second portion extending in the insertion direction between the ends of the first break portions 27a and 27a. And a breaking portion 27b. Moreover, each fracture | rupture part 27a, 27b is provided with the non-breakage part which has not put the blade. In the third embodiment configured as described above, the same operations and effects as those of the first embodiment can be obtained.

(Fourth embodiment)
FIG. 10 shows a packaging box 10 of the fourth embodiment. The packaging box 10 is different from the first embodiment in that a folding line 26 that defines the locking piece 25 is provided so as to be inclined and extend along the insertion direction. In other words, the folding line 26 may be configured to extend along the insertion direction except for a configuration extending in a direction orthogonal to the insertion direction. In the fourth embodiment configured as described above, the same operations and effects as those of the first embodiment can be obtained. In addition, the structure which inclines the folding line 26 of the latching piece 25 with respect to an insertion direction is applicable also to the packaging box 10 of 2nd and 3rd embodiment.

(Fifth embodiment)
FIG. 11 shows a packaging box 10 of the fifth embodiment. As in the second embodiment, the packaging box 10 is provided with a locking piece 25 on the outside of the insertion protrusion 24, and the both sides of the upper outer flaps 16 </ b> A and 16 </ b> B from both ends of the auxiliary folding curve 28 to the base side of the folding curve 26. The second embodiment is different from the second embodiment in that the inclined edge is punched out and the locking piece 25 protrudes outward. In the fifth embodiment thus configured, the same operations and effects as those of the second embodiment can be obtained. Moreover, you may provide the latching piece 25 so that it may be located in the center side like 1st Embodiment, and you may make the folding line 26 incline with respect to an insertion direction like 4th Embodiment.

(Sixth embodiment)
FIG. 12 shows a packaging box 40 of the sixth embodiment. The packaging box 40 has a first inner flap (inner flap) 45 in which the inserted portion 52 is formed on one side wall 41B of the opposite side walls 41A and 41B, and is inserted into the other side wall 41A. It differs from each embodiment by the point which provided the outer flap 44 which formed the protrusion 53 continuously.

  The packaging box 40 includes a side wall 41A, an end wall 42A, a side wall 41B, and an end wall 42B that are continuous in the lateral direction, and a glue margin wall 43 that is attached to the end wall 42B is connected to the side wall 41A. An outer flap 44 is connected to the upper edge of the side wall 41A, and a first inner flap 45 is connected to the upper edge of the side wall 41B. A second inner flap 46 is connected to the upper edge of the end wall 42A, and a third inner flap 47 is connected to the upper edge of the end wall 42B. A first bottom flap 48 is connected to the lower edge of the side wall 41A, and a second bottom flap 49 is connected to the lower edge of the side wall 41B. A third bottom flap 50 is connected to the lower edge of the end wall 42A, and a fourth bottom flap 51 is connected to the lower edge of the end wall 42B. These bottom flaps 48 to 51 are of a so-called one-touch type in which predetermined positions are adhered and the lower opening ends can be automatically closed by opening the side walls 41A and 41B and the end walls 42A and 42B in a rectangular shape in plan view.

  At the center in the width direction of the first inner flap 45, a to-be-inserted portion 52 made of an elliptical slit extending in a direction orthogonal to the insertion direction is provided. At the center of the outer flap 44 in the width direction, an insertion protrusion 53 having a lateral width narrower than the insertion portion 52 is provided. A pair of locking pieces 54 are provided on both sides of the insertion protrusion 53, and these are defined by a folding line 55 and a breaking line 56.

  In the sixth embodiment as described above, similarly to the first embodiment, the upper opening end of the packaging box 40 can be repeatedly opened and closed by inserting the insertion piece into the inserted portion 52 in an unbent state. It can be in a sealed state. Further, by inserting each of the locking pieces 54 and 54 into the inserted portion 52 in a bent state, the locking piece 54 is locked to the rear edge of the inserted portion 52 in the insertion direction. Therefore, it is possible to obtain a sealed state that cannot be opened unless either the outer flap 44 including the locking piece 54 and the insertion protrusion 53 or the first inner flap 45 including the inserted portion 52 is broken. Therefore, the packaging box 40 of the sixth embodiment can obtain the same operations and effects as those of the first embodiment.

  The packaging box and the lock structure of the present invention are not limited to the configuration of the above embodiment, and various modifications can be made.

  For example, in the first to fifth embodiments, a pair of insertion portions 21 and 21 are provided on the upper inner flaps 15A and 15B, and a pair of insertion protrusions 24 including the locking pieces 25 on the upper outer flaps 16A and 16B. , 24, but only one upper outer flap 16A, 16B is provided with the insertion protrusion 24 including the locking piece 25, and only the corresponding position of the upper inner flap 15A, 15B is provided with the inserted portion 21. Also good. In this case, the other upper outer flaps 16A and 16B may have a configuration in which a simple insertion projection 24 without the locking piece 25 is provided, or a configuration in which the insertion projection 24 itself is not provided.

  Moreover, the structure which makes the to-be-inserted part 52 the slit (hole) by stamping like 6th Embodiment, and latches the locking piece 54 to the edge of the insertion direction rear side of the to-be-inserted part 52 is 1st. To the packaging box 10 of the fifth embodiment. Moreover, also in the packaging box 10 of 1st to 5th embodiment, it is good also as a structure which does not provide an insertion protrusion fracture | rupture part like 6th Embodiment. In the first to fifth embodiments, only the upper flaps 15A, 15B, 16A, and 16B are formed with an interlock structure that can be sealed without using an adhesive tape or the like, but the lower flaps 17A, 17B, and 18A are formed. , 18B.

  Further, in each embodiment, the packaging boxes 10 and 40 are formed so as to have a quadrilateral shape in plan view. However, the packaging boxes 10 and 40 may have an octagonal shape in plan view in which a chamfer wall is provided between each pair of side walls and end walls. The shape of the packaging boxes 10 and 40 such as the visual shape and the side view shape can be changed as desired. That is, in a packaging box in which an inner flap and an outer flap are connected to the opening end of the outer peripheral wall, as in each embodiment, the inner flap is provided with a plugged portion, and the outer flap includes a locking piece. What is necessary is just to provide a protrusion.

  In addition, the lock structure including the inserted portion and the insertion protrusion is not limited to the packaging box, and the second wall is repeatedly engaged with and detached from the first wall, and then the lock structure cannot be finally removed. Any paper product that needs to be worn is applicable.

  And in the said embodiment, although the cardboard sheet | seat made from paper was pierce | punched and the packaging box was formed, you may pierce and form the cardboard sheet | seats made from resin. Moreover, it is not restricted to a corrugated board sheet, You may form with a single cardboard or a resin sheet.

10, 40 ... Packaging box 11A, 11B ... Side wall (outer peripheral wall)
12A, 12B ... end wall (outer wall)
15A, 15B ... Upper inner flap (inner flap)
16A, 16B ... Upper outer flap (outer flap)
17A, 17B ... Lower outer flap 18A, 18B ... Lower inner flap 19 ... Second folding line (open end)
DESCRIPTION OF SYMBOLS 21 ... Insertion part 22 ... Continuous part 23 ... Cutting part 24 ... Insertion protrusion 25 ... Locking piece 26 ... Folding curve 27 ... Breaking line 28 ... Auxiliary folding curve 29 ... Insertion protrusion part breaking part 30 ... Pressing part

Claims (5)

In a packaging box in which an inner flap and an outer flap are connected to the opening end of the outer peripheral wall, the outer flap is arranged on the outer surface side of the inner flap, and the opening end of the outer peripheral wall is sealed.
The said flap to be inserted portion is provided which communicates with the interior, the said outer flap and plug protrusion to be inserted into the inner surface of the inner flap is provided from the object insertion unit,
The insertion protrusion includes a locking piece extending in the insertion direction to the inserted portion,
The lateral width of the insertion protrusion including the locking piece in the direction orthogonal to the insertion direction is formed to be equal to or less than the lateral width of the inserted portion orthogonal to the insertion direction,
The locking piece is
A folding line extending along the insertion direction, and a break line consisting of a plurality of cutting lines and extending from the end of the folding line in a direction intersecting the insertion direction,
Are broken along the break line, wherein the at Rukoto inserted into the insertion portion in a folded state along a fold line, engages the edge of the front Symbol the insertion portion with respect to the insertion projection Is possible,
A packaging box that can not be locked to an edge of the inserted portion by being inserted into the inserted portion in a non-bent state without being broken along the breaking line . The packaging box according to claim 1, wherein the outer flap has an insertion protrusion fracture portion that separates the insertion protrusion.   The outer flap includes an auxiliary folding line extending in a direction orthogonal to the insertion direction, in front of the insertion direction of the insertion protrusion,
  The packaging box according to claim 2, wherein the insertion protrusion rupture portion is provided from an end portion of the auxiliary fold curve to an intersection of the fold curve and the rupture line.   4. The pressing device according to claim 1, wherein the outer flap is provided with a pressing portion that protrudes in the same direction as the insertion protrusion and is disposed on an outer surface side of the inner flap. 5. Packaging box. A first wall provided with a plugged portion communicating with the interior;
A second wall provided on the outer surface side of the first wall and provided with an insertion protrusion inserted into the inner surface side of the first wall from the inserted portion;
The insertion protrusion includes a locking piece extending in the insertion direction to the inserted portion,
The lateral width of the insertion protrusion including the locking piece in the direction orthogonal to the insertion direction is formed to be equal to or less than the lateral width of the inserted portion orthogonal to the insertion direction,
The locking piece is
A folding line extending along the insertion direction, and a break line consisting of a plurality of cutting lines and extending from the end of the folding line in a direction intersecting the insertion direction,
Are broken along the break line, wherein the at Rukoto inserted into the insertion portion in a folded state along a fold line, engages the edge of the front Symbol the insertion portion with respect to the insertion projection Is possible,
The paper product is characterized in that it can not be locked to an edge of the inserted portion by being inserted into the inserted portion in a non-bent state without being broken along the breaking line. Lock structure.

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