JP2005219778A - Lock structure of paper product and packaging box using this lock structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively maintain a locked state even if a plurality of times of locking or unlocking operations are carried out. <P>SOLUTION: This is a lock structure of paper product for use in connecting a first surface 10 and a second surface 11 that are different from each other. This lock structure comprises: a long lock hole 12 formed at the first surface 10; a continuous part 14 cooperatively arranged at the edge of the second surface 11; a first protrusion 15 protruded from one side of the continuous part 14; a second protrusion 16 protruded from the other side of the continuous part 14; and a lock part 13 in which a size S1 ranging from the extremity end of the first protrusion 15 to the other side of the continuous part 14 is longer than an entire length L, and a size S2 ranging from the extremity end of the second protrusion 16 to one side of the continuous part 14 is less than the entire length L of the lock hole 12. The first protrusion 15 is inserted into the lock hole 12 and the second protrusion 16 at the other side is inserted into the lock hole 12 under a state in which one side of the continuous part 14 abuts against the edge of the lock hole 12 to cause the first surface 10 and the second surface 11 to be connected to each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

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

  Prior art document information relating to the lock structure of the packaging box which is the paper product of the present invention includes the following.

Japanese Utility Model Publication No. 61-8521

  In the packaging box of Patent Document 1, a side wall is erected on an outer peripheral edge of a rectangular bottom wall. Among them, the rear side wall is continuously provided with a cover plate for closing the upper end opening surrounded by each side wall, and the front side wall is continuously provided with a folding piece located on the inner surface of the cover plate. . A lock piece protruding in a substantially Y shape is connected to the front end of the lid plate, and a lock hole having a Y shape is provided in the front side wall. By inserting and locking, the upper end opening is closed by the lid plate so that it can be opened and closed.

  However, in the lock structure of Patent Document 1, since the upper end opening is closed with the cover plate by inserting the lock piece into the lock hole, it can be resealed by removing the lock piece from the lock hole. However, when sealing and opening are repeated, there is a problem that the waist of the lock piece having a substantially Y shape becomes weak and the sealed (locked) state cannot be reliably maintained.

  Accordingly, an object of the present invention is to provide a paper product locking structure that can reliably maintain a locked state even when locking and unlocking are performed a plurality of times, and a packaging box using the locking structure.

  In order to solve the above problems, the paper product lock structure of the present invention is a paper product lock structure for connecting different first and second surfaces, and is a long product formed on the first surface. A lock hole, a continuous portion provided continuously to the edge of the second surface, a first protrusion protruding from one side of the continuous portion, and a second protrusion protruding from the other side of the continuous portion, The dimension (S1) from the tip of the first protrusion to the other side of the continuous part is longer than the total length (L) of the lock hole, and the dimension (S2) from the tip of the second protrusion to one side of the continuous part. ) Includes a lock portion having a length equal to or less than the total length (L) of the lock hole, the first protrusion is inserted into the lock hole, and one side of the continuous portion is in contact with an edge of the lock hole. The first surface and the second surface are connected by inserting the second protrusion on the other side into the lock hole.

  The first packaging box using this lock structure has an outer wall surface, an upper wall surface continuous with the outer wall surface, and an inner wall surface continuous with the upper wall surface on at least one side of the outer peripheral edge of the polygonal bottom surface. In a packaging box in which a side wall of a double wall structure is provided, and a long lock hole is provided in at least one of the bottom surface and the upper wall surface, and different boxes can be connected by a separate lock member. The member includes an erection surface extending to the side wall of the adjacent box, a continuous portion continuously provided on both side edges of the erection surface, a first protrusion protruding from one side of the continuation portion, and from the other side of the continuation portion. A projecting second projection, and a dimension (S1) from the tip of the first projection to the other side of the continuous portion is longer than a total length (L) of the lock hole, and the dimension from the tip of the second projection is The dimension (S2) to one side of the continuous part is less than the total length (L) of the lock hole A pair of lock portions is provided, and the first protrusion is inserted into the lock hole, and the second protrusion on the other side is brought into contact with an edge of the lock hole. Is inserted into the lock hole so that different boxes can be connected.

  In addition, the second packaging box has three or more side surfaces that are linearly continuous, and forms a folding surface for connecting to the edge of the side surface of the other end on the side surface of one end, and has openings formed vertically. In a packaging box that is closed by a lid formed integrally or separately, a continuous portion is provided that is provided with a long lock hole on the folding surface, and that is continuous with an edge of a side surface that overlaps the outside of the folding surface, A first protrusion protruding from one side of the continuous part and a second protrusion protruding from the other side of the continuous part, and a dimension (S1) from the tip of the first protrusion to the other side of the continuous part ) Is longer than the total length (L) of the lock hole, and a lock portion having a dimension (S2) from the tip of the second protrusion to one side of the continuous portion is equal to or less than the total length (L) of the lock hole is provided. The first protrusion is inserted into the lock hole, and one side of the continuous part is brought into contact with an edge of the lock hole. In state, by inserting the second projection of the other side into the lock hole, in which so as to connect the side surface of the folded surface and the other end.

  Further, the third packaging box includes a peripheral wall having three or more side surfaces, and the bottom surface is closed by a bottom cover made of a single body or a separate body, and the top surface is closed by a cover surface continuously provided on any side surface. In such a packaging box, at least the upper part of at least one side surface excluding the side surface provided with the lid surface is formed from an outer wall surface, an upper wall surface continuous with the outer wall surface, and an inner wall surface continuous with the upper wall surface. A double wall structure having a long lock hole on the upper wall surface, a continuous portion connected to the edge of the lid surface corresponding to the lock hole, and a first protruding from one side of the continuous portion A protrusion and a second protrusion protruding from the other side of the continuous part, and the dimension (S1) from the tip of the first protrusion to the other side of the continuous part is the total length (L) of the lock hole Longer dimension from the tip of the second protrusion to one side of the continuous part (S ) Is provided with a lock portion having a length equal to or less than the total length (L) of the lock hole, the first protrusion is inserted into the lock hole, and one side of the continuous portion is brought into contact with an edge of the lock hole Thus, by inserting the second protrusion on the other side into the lock hole, the upper wall surface and the lid surface are connected, and the upper end opening surrounded by the side surface can be closed.

  In the paper product lock structure of the present invention, the first protrusion and the second protrusion are inserted or pulled out so that the lock part swings to the left and right with respect to the lock hole. Without applying a load, the locked state or the unlocked state can be obtained. Therefore, it is possible to suppress the weakness of the paper that is the forming material to the maximum, and as a result, it is possible to lock and unlock a plurality of times.

  Further, the first packaging box using the lock structure is different in that the lock hole is provided on the upper wall surface constituting the bottom surface or the side wall of the packaging box and the lock member in which the lock portion is formed is provided. The boxes can be connected and disconnected as desired.

  Furthermore, in the second packaging box using the lock structure, a lock hole is provided in a folding surface for connecting the side surface of one end to the edge of the side surface of the other end, and a lock portion is provided on the side surface of the other end. Therefore, a packaging box can be assembled without gluing. Therefore, it can be easily assembled only when necessary, and can be easily unfolded and stored in a small occupied space when unnecessary.

  Furthermore, in the third packaging box using the lock structure, a lock hole is provided on the upper wall surface of one side surface, and a lock hole is provided on the lid surface, so that the top surface is closed a plurality of times as desired. And can be opened.

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

  1 and 2 show the locking structure of the present invention. This lock structure is for connecting different first surfaces 10 and second surfaces 11 in a paper product such as a packaging box, and has a long lock hole 12 formed in the first surface 10 and a second surface. 11 and a lock portion 13 connected to 11.

  The lock hole 12 includes a hole portion 12a punched out in a rectangular shape, and slits 12b and 12b formed to extend outward from both ends of the hole portion 12a.

  The lock portion 13 includes a continuous portion 14 provided continuously with the edge of the second surface 11, a first protrusion 15 protruding from one side 14 a of the continuous portion 14, and a protrusion 14 from the other side 14 b of the continuous portion 14. The second protrusion 16. The protrusion amount of the first protrusion 15 is configured to be larger than the protrusion amount of the second protrusion 16.

  Specifically, a dimension S1 from the tip of the first protrusion 15 to the other side 14b of the continuous part 14 provided with the second protrusion 16 is a slit 12b, which is the entire length L of the lock hole 12. It is formed to be longer than the dimension between both ends of 12b (S1> L). The dimension S2 from the tip of the second protrusion 16 to the one side 14a of the continuous part 14 provided with the first protrusion 15 is not more than the total length L of the lock hole 12 (S2 ≦ L), preferably Are formed with substantially the same dimensions, which are slightly shorter.

  In the lock structure configured as described above, as shown in FIG. 2A, the first protrusion 15 is inserted into the lock hole 12, and one side 14 a of the continuous portion 14 is formed at the edge of the hole 12 a in the lock hole 12. Make contact. In this state, the second protrusion 16 on the other side 14b is rotated around the contact portion, and the second protrusion 16 is pushed into the lock hole 12 as shown in FIG. insert. Thereby, the 1st protrusion 15 and the 2nd protrusion 16 are extended outward from the both-sides edge of a longitudinal direction inside the lock hole 12, and it can engage with the surface of the 1st surface 10, and can maintain a locked state reliably. . In other words, the first surface 10 and the second surface 11 constituting the paper product can be reliably connected.

  On the other hand, when releasing the lock between the lock hole 12 and the lock portion 13, the lock portion 13 is slid so that the one side 14 a of the continuous portion 14 contacts the edge of the lock hole 12. Next, the second protrusion 16 is pulled out from the lock hole 12 by pulling the other side 14 b of the continuous part 14 where the second protrusion 16 is provided. Thereafter, the first protrusion 15 is pulled out from the lock hole 12 by pulling diagonally upward toward the protruding direction of the second protrusion 16. Thereby, the locking between the lock hole 12 and the lock portion 13 is completely released, and the connection between the first surface 10 and the second surface 11 is released.

  As described above, in the lock structure of the present invention, the lock portion 13 is inserted into or pulled out from the lock hole 12 so as to swing left and right. On the other hand, the lock state or the unlock state can be achieved with almost no load (deformation). Therefore, it is possible to suppress the weakness of the paper that is the forming material to the maximum, and as a result, it is possible to lock and unlock a plurality of times.

  In the lock structure of the present invention, the lock hole 12 may be constituted by only the rectangular hole 12a without providing the slit 12b. The lock portion 13 includes a dimension S1 from the tip of the first protrusion 15 to the other side 14b of the continuous portion 14, a dimension S2 from the tip of the second protrusion 16 to one side 14a of the continuous portion 14, and a lock. If the total length L of the hole 12 is set within the range of the above condition (S2 ≦ L <S1), the protruding amounts of the first protruding portion 15 and the second protruding portion 16 protruding from the continuous portion 14 can be changed as desired. It is.

  Next, the packaging boxes 20, 40 and 60, which are paper products using the lock structure, will be specifically described. These packaging boxes 20, 40, 60 are formed by punching a well-known corrugated cardboard sheet in which a corrugated shin is provided between the cover and the back paper as a blank by a well-known paper container punching device (not shown). Yes.

  1. Configuration of the packaging box of the first embodiment

  3 to 6 show the packaging box 20 of the first embodiment using the lock structure. As shown in FIG. 3, the packaging box 20 has a top-opening in which side walls 22 </ b> A to 22 </ b> D having a double wall structure are erected on the outer peripheral edge of a rectangular bottom surface 21, and a pair of opposing side walls 22 </ b> A. 22C, the lock hole 12 is provided, and a separate lock member 31 having a pair of the lock portions 13 is formed so that the plurality of packaging boxes 20 can be connected and divided. Moreover, the packaging box 20 of this 1st Embodiment is provided with the separate cover body 34 which obstruct | occludes the upper end opening.

  As shown in FIG. 5, the blank of the packaging box 20 includes a bottom surface 21 having a rectangular shape, and side walls 22 </ b> A, 22 </ b> B, 22 </ b> C, and 22 </ b> D are continuously provided on four sides of the bottom surface 21. A fold line 23 is formed at the boundary between the bottom surface 21 and the side walls 22A to 22D by forming a ruled line so as to compress the wall thickness. The side walls 22A to 22D respectively include outer wall surfaces 24A to 24D that are continuous with the bottom surface 21, upper wall surfaces 25A to 25D that are continuous with the outer wall surfaces 24A to 24D, and inner wall surfaces 26A to 26A that are continuous with the upper wall surfaces 25A to 25D. 26D, and a folding line 27 similar to the above is provided at each boundary portion. Among them, in the side walls 22A and 22C facing vertically, first reinforcing flaps 28 located on the inner surfaces of the adjacent outer wall surfaces 24B and 24D in an assembled state are connected to both ends of the outer wall surfaces 24A and 24C, and the inner wall surface 26A. 26C, the second reinforcing flaps 29 located on the inner surfaces of the adjacent inner wall surfaces 26B, 26D in an assembled state are connected to both ends, and folding lines 30 are provided at the respective boundary portions.

  And in this embodiment, the lock hole 12 which consists of the said hole part 12a and the slit 12b in the upper and lower edges which the said bottom face 21 opposes, and the upper wall surfaces 25A and 25C of the side walls 22A and 22C connected to the upper and lower edges. Are formed respectively.

  As shown in FIG. 6A, the blank of the lock member 31 includes an erection surface 32 having a dimension extending to the side walls 22A and 22C of the adjacent packaging boxes 20 and 20, and is continuous with both side edges of the erection surface 32. The lock part 13 which consists of the part 14, the 1st protrusion 15, and the 2nd protrusion 16 is provided continuously, and the folding line 33 is provided in the boundary part. The first protrusion 15 of one lock portion 13 and the first protrusion 15 of the other lock portion 13 are formed so as to protrude in the same direction. Further, in the present embodiment, the erection surface 32 has an edge on the side of the second protrusion 16 that is an operation side when unlocking by the lock part 13 is extended beyond the second protrusion 16. The projecting portion is formed and can be used as an operation portion. The total length L of the lock hole 12, the dimension S1 from the tip of the first protrusion 15 to the other side 14b of the continuous portion 14, and the dimension S2 from the tip of the second protrusion 16 to one side 14a of the continuous portion 14 This relationship is formed in the range of the condition (S2 ≦ L <S1).

  As shown in FIG. 6B, the blank of the lid body 34 is made of a rectangular sheet having a rectangular shape having substantially the same dimensions as the bottom surface 21 of the packaging box 20. In the center of the long side which is the upper and lower edges of the lid 34, the lock hole 12 is also used as an insertion hole, and an insertion piece 35 for maintaining the closed state by the lid 34 is provided continuously. A folding line 36 is provided at the boundary portion.

  In 1st Embodiment comprised in this way, as shown in FIG. 4, the two packaging boxes 20 are arrange | positioned so that it may adjoin. In this state, the pair of first protrusions 15 and 15 of the lock member 31 are inserted into adjacent lock holes 12 and 12 formed in the side wall 22A of one packaging box 20 and the side wall 22C of the other packaging box 20, respectively. . Thereafter, the one side 14a, 14a of the continuous portion 14 is brought into contact with the edges of the lock holes 12, 12, and the second protrusions 16, 16 are pressed downward to be in a locked state. Thereafter, the two packaging boxes 20 are turned upside down, and the lock member 31 is disposed in the adjacent lock holes 12, 12 provided in the bottom surface 21 in the same manner as described above, and the bottom surface 21 is connected. Thereby, the separate packaging box 20 can be connected integrally. Thereafter, the two lids 34 and 34 are arranged above the packaging boxes 20 and 20, and the insertion pieces 35 are inserted into the lock holes 12 to close the upper end openings of the packaging boxes 20 and 20.

  Further, when the two connected packaging boxes 20 are separated, after the lid 34 is removed, the end of the erection surface 32 of the lock member 31 constituting the operation portion is grasped and pulled to pull the second protrusion. The portions 16 and 16 are pulled out of the lock holes 12 and 12 and the first protrusions 15 and 15 are pulled out to unlock the lock hole 12 and the lock portion 13. Thereby, the two packaging boxes 20 can be separated without substantially impairing the rigidity of the lock hole 12 and the lock portion 13.

  As described above, in the first embodiment, the lock hole 12 is provided in the upper surface 25A, 25C of the bottom surface 21 and the side walls 22A, 22C constituting the first surface 10, and the construction surface of the lock member 31 constituting the second surface 11 is provided. Since the pair of lock portions 13 are provided in 32, a plurality of packaging boxes 20 can be connected and separated as desired.

  In addition, the bottom face 21 of the packaging box 20 of 1st Embodiment is not restricted to square shape, What is necessary is just three or more polygonal shapes as desired. Further, the side walls 22 do not have to have a double wall structure, and only the side where the lock hole 12 is formed may have a double wall structure. Further, the lock hole 12 does not need to be provided on both the bottom surface 21 and the side walls 22A and 22C, and may be provided on only one of the side walls 22A and 22C.

  2. Configuration of packaging box of second embodiment

  7 to 9 show a packaging box 40 of a second embodiment using the lock structure. As shown in FIG. 7, the packaging box 40 includes four linearly continuous side surfaces 41A to 41D, and a side surface 41A at one end is provided with a folding surface 42 for connecting to the edge of the side surface 41D at the other end. In addition, the lock hole 12 is provided in the folding surface 42, and the lock portion 13 is connected to the side surface 41D at the other end so that assembly and deployment can be performed without sticking.

  The blank of the packaging box 40 includes four side surfaces 41A, 41B, 41C, and 41D, and a folding surface 42 for connecting to the side surface 41D at the other end is connected to the side surface 41A at one end. Further, a folding line 43 formed by putting a ruled line so as to compress the wall thickness is provided at a boundary portion between the side surfaces 41A to 41D and the folding surface 42.

  Of the side surfaces 41 </ b> A to 41 </ b> D, an outer flap 44 constituting a canopy is connected to the upper end edge of the side surface 41 </ b> D, and the insertion piece 45 is inserted into the upper end of the side surface 41 </ b> B facing the tip of the outer flap 44. Are connected. Further, a folding line 46 similar to the above is provided at these boundary portions. In addition, an inner flap 47 located on the inner surface of the outer flap 44 is connected to the upper edge of the side surfaces 41A and 41C facing each other in the assembled state, and a folding line 48 is provided at the boundary portion.

  Moreover, the bottom lid by the meshing method is provided in the lower end edge of the said side surfaces 41A-41D. Specifically, in the bottom lid, a first flap 49 that is bent first is connected to the side surface 41B, a second flap 50 that is bent second is connected to the opposite side surfaces 41A and 41C, and is finally bent. Three flaps 51 are connected to the side surface 41D, and a folding line 52 is provided at the boundary between each side surface 41A to 41D. The first flap 49 is formed to have a size such that a third flap 51, which will be described later, and a leading edge are in contact with each other, and engaging protrusions 49a protruding in a rectangular shape are provided at both ends and the center. The second flap 50 is formed by forming an oblique side 50a inclined toward the inner ends of the engaging protrusions 49a on both sides of the first flap 49 in a bent state. The third flap 51 is provided with a pair of engaging protrusions 51a located between the engaging protrusions 49a, 49a of the first flap 49, and the engagement from both ends of the boundary portion with the side surface 41D. A hypotenuse 51b that is inclined toward the projecting piece 51a is formed.

  And in this embodiment, the lock hole 12 which consists only of the hole part extended along the folding line 43 is formed in the boundary part center with 41 A of side surfaces in the said folding surface 42. As shown in FIG. In addition, a lock portion 13 composed of the continuous portion 14, the first protrusion 15 and the second protrusion 16 is formed at the approximate center of the edge of the side surface 41D, and a folding line 53 is provided at the boundary portion. . Here, in the packaging box 40 of 2nd Embodiment, it forms so that the 1st protrusion 15 may protrude below from the continuous part 14, and the 2nd protrusion 16 may protrude above. And the upper edge of the continuous part 14 which is the said other side 14b is made into the position which substantially corresponds with the upper end edge of the said lock hole 12 in the state which made the upper and lower end edge of side surface 41A, 41D correspond. Moreover, the protrusion amount of the 2nd protrusion part 16 is large compared with 1st Embodiment, and it has comprised so that a latching force may become large. The total length L of the lock hole 12, the dimension S1 from the tip of the first protrusion 15 to the other side 14b of the continuous portion 14, and the dimension S2 from the tip of the second protrusion 16 to one side 14a of the continuous portion 14 This relationship is formed in the range of the condition (S2 ≦ L <S1).

  In the second embodiment configured as described above, as shown in FIG. 7A, each of the side surfaces 41A to 41D, the folding surface 42, and the lock portion 13 is bent, and the side surface 41D is distorted upward. The protrusion 15 is inserted into the lock hole 12. Thereafter, the side surface 41 </ b> D is pushed downward so that one side 14 a of the continuous portion 14 is brought into contact with the lower end edge of the lock hole 12, and then the second protrusion 16 is inserted into the lock hole 12. Accordingly, as shown in FIG. 7B, the side surface 41D is elastically moved upward, the adjacent side surface 41A and the upper and lower end edges coincide with each other, and a locked state is established.

  Next, the first flap 49, the second flap 50, and the third flap 51 constituting the bottom lid are bent in order, and the engagement flap 51a is positioned on the inner surface side of the first flap 49 by pressing the third flap 51. Let As a result, as shown in FIGS. 8A and 8B, the four flaps 49, 50, 50, 51 are locked so as to mesh with each other, and the lower opening is closed. In this state, a desired product is accommodated inside, the inner flap 47 is bent, the outer flap 44 is bent, and the insertion piece 45 at the tip is inserted inside the side surface 41B, thereby closing the upper opening. .

  Moreover, when developing the packaging box 40 assembled in this way, the outer flap 44 constituting the canopy is opened. Thereafter, the first flap 49 constituting the bottom lid is pressed inward, and the engagement between the first flap 49 and the engagement protrusions 49a, 51a of the third flap 51 is released, whereby the third flap 51 is released. The second flap 50 and the first flap 49 can be opened sequentially.

  Next, the side surface 41 </ b> D is moved downward with respect to the folding surface 42, and the tip of the second protrusion 16 is moved from the lock hole 12 in a state where the one side 14 a of the continuous portion 14 is in contact with the lower end edge of the lock hole 12. The lock hole 12 and the lock portion 13 are unlocked by pulling out and pulling out the first protrusion 15. Thereby, the packaging box 40 can be developed without substantially impairing the rigidity of the lock hole 12 and the lock portion 13.

  As described above, in the second embodiment, the lock hole 12 is provided in the folding surface 42 constituting the first surface 10, and the lock portion 13 is provided in the side surface 41 </ b> D constituting the second surface 11. It can be used or unfolded when not needed and stored in a blank state with little occupied space.

  In addition, although the packaging box 40 of 2nd Embodiment was made into the cross-sectional rectangular shape provided with the four side surfaces 41A-41D, if it is a cross-sectional polygonal shape which has the three or more side surfaces 41, it is applicable similarly. In addition, similar actions and effects can be obtained. Moreover, in the said embodiment, although the flap which comprises a canopy and a bottom cover was integrally connected by the upper-lower-end edge of side surface 41A-41D, you may comprise one or both separately.

  3. Configuration of packaging box of third embodiment

  10 to 12 show a packaging box 60 of a third embodiment using the lock structure. As shown in FIG. 10, the packaging box 60 includes a peripheral wall composed of four side surfaces 61A to 61D, and the top surface thereof is closed by a lid surface 70 provided continuously to the side surface 61A. The upper part of the side surface 61C opposite to 61A has a double wall structure, the lock hole 12 is provided in the side surface 61C, the lock portion 13 is provided in the lid surface 70, and a plurality of top surfaces of the peripheral wall are formed by the lid surface 70. It can be closed and opened over time.

  As shown in FIG. 12, the blank of the packaging box 60 includes four side surfaces 61A, 61B, 61C, 61D constituting a peripheral wall, and is attached to the side surface 61A at one end thereof with the side surface 61D at the other end. An adhesive margin 62 is continuously provided. Further, a folding line 63 formed with a ruled line so as to compress the wall thickness is provided at a boundary portion between the side surfaces 61A to 61D and the margin part 62.

  Of the side surfaces 61 </ b> A to 61 </ b> D, the side surface 61 </ b> A has a double wall structure including an outer wall surface 64, an upper wall surface 65 continuous with the outer wall surface 64, and an inner wall surface 66 continuous with the upper wall surface 65. Yes. The inner wall surface 66 is provided with an inner lid surface 67 located at a predetermined interval from the upper end opening surrounded by the side surfaces 61A to 61D, and is in surface contact with the inner surface of the side surface 61C. A locking surface 68 is provided continuously. A folding line 69a similar to that described above is provided at the boundary between the outer wall surface 64, the upper wall surface 65, and the inner wall surface 66, and the boundary portion between the inner wall surface 66, the inner lid surface 67, and the locking surface 68 has a predetermined Lead ruled lines 69b each having a cutting line and a folding line formed at intervals are provided.

  The lid surface 70 that closes the upper end opening is connected to the upper edge of the side surface 61C facing the side surface 61A, and a fold line 71 is provided at the boundary portion. Furthermore, an inner flap 72 located on the inner surface of the lid surface 70 is connected to the upper edge of the side surfaces 61B and 61D, and a folding line 73 is provided at the boundary portion. The inner flap 72 is provided with a notch 74 for opening operation at an edge located on the side surface 61A side which is the front side.

  Further, flaps 75A, 75B, 75C, and 75D that automatically close the bottom surface opening by expanding the side surfaces 61A to 61D in a rectangular shape are continuously provided at the lower end edges of the side surfaces 61A to 61D, and the folding line 76 is formed at each boundary portion. Is provided. The flaps 75A and 75C connected to the side surfaces 61A and 61C have a trapezoidal shape that is approximately half the width of the side surfaces 61B and 61D. In the figure, the flaps 75B and 75D have a pentagonal shape on the side of the adjacent flaps 75B and 75D. A marginal portion 77 is provided, and a folding line 78 is provided at the boundary portion. A locking projection 79 is provided on the left side of the flaps 75 </ b> A and 75 </ b> C, and a locking groove is formed between the locking projection 79 and the glue margin 77. The flaps 75B and 75D are trapezoidal.

  And the lock hole 12 which consists only of a rectangular-shaped hole part is formed in the center of the upper wall surface 65 of 61 A of side surfaces which comprise a double wall along the folding line 69a. In addition, a lock portion 13 composed of the continuous portion 14, the first protrusion 15 and the second protrusion 16 is formed in the approximate center of the edge of the lid surface 70, and a folding line 80 is provided at the boundary portion. Yes. Here, in the packaging box 60 of the third embodiment, similarly to the second embodiment, the protrusion amount of the second protrusion 16 is larger than that of the first embodiment, and the locking force is increased. doing. The total length L of the lock hole 12, the dimension S1 from the tip of the first protrusion 15 to the other side 14b of the continuous portion 14, and the dimension S2 from the tip of the second protrusion 16 to one side 14a of the continuous portion 14 This relationship is formed in the range of the condition (S2 ≦ L <S1).

  In the third embodiment configured as described above, the flaps 75A to 75D are bent inward, the side 61A is bent with respect to the side 61B, and the side 61D is bent with the adhesive margin 77 bent outward. Bend the side surface 61C. As a result, the adhesive margin 62 is adhered to the edge of the opposing side surface 61D, and the adhesive margin 77 is adhered to the opposing flaps 75B and 75D.

  When using this packaging box 60, first, as shown to FIG. 10 (A), (B), each side surface 61A-61D is expanded so that a rectangular shape may be made. Then, as shown in FIG. 10B, the flaps 75A to 75D constituting the bottom lid are bent at an angle of about 90 degrees with respect to the continuous side surfaces 61A to 61D, and the leading edges of the flaps 75A and 75C are engaged with each other. Engage with.

  Next, as shown in FIG. 11 (A), the upper wall surface 65, the inner wall surface 66, the inner lid surface 67 and the locking surface 68 that are continuous with the side surface 61A are bent so that the inner lid surface 67 is the upper end of the side surfaces 61A to 61D. Assemble so that it is located at a predetermined distance from the opening.

  Thereafter, as shown in FIG. 11B, after bending the inner flap 72, the first protrusion 15 of the lock portion 13 is inserted into the lock hole 12 while distorting the lid surface 70. Thereafter, the one side 14 a of the continuous portion 14 is brought into contact with the edge of the lock hole 12, and then the second protrusion 16 is inserted into the lock hole 12. Thereby, the cover surface 70 elastically coincides with the upper end opening, and the first protrusion 15 and the second protrusion 16 of the lock part 13 protrude from both side edges of the lock hole 12 to be in a locked state. As a result, the state where the upper end opening of the packaging box 60 is reliably closed by the lid surface 70 is maintained.

  Further, when opening the packaging box 60 closed by the lid surface 70 in this way, the top surface is moved with respect to the side surface 61A so that the one side 14a of the continuous portion 14 is brought into contact with the edge of the lock hole 12. In this state, the tip of the second protrusion 16 is pulled out from the lock hole 12 and the first protrusion 15 is pulled out to unlock the lock hole 12 and the lock part 13. Thereby, the packaging box 60 can be opened without substantially impairing the rigidity of the lock hole 12 and the lock portion 13.

  Thus, in the third embodiment, the lock hole 12 is provided in the upper wall surface 65 of the side surface 61A constituting the first surface 10, and the lock portion 13 is provided in the lid surface 70 constituting the second surface 11, The integrally provided lid surface 70 can be closed and opened multiple times.

  In addition, although the packaging box 60 of 3rd Embodiment was made into the cross-sectional rectangular shape provided with the 4 side surfaces 61A-61D, if it is a cross-sectional polygonal shape which has the 3 or more side surfaces 61, the same effect | action and An effect can be obtained. Moreover, in the said embodiment, although flap 75A-75D which comprises a bottom cover was integrally connected by the lower end edge of side surface 61A-61D, you may comprise separately. Furthermore, in the said embodiment, although only the side surface 61A facing the cover surface 70 was comprised by the double wall, you may comprise the side surfaces 61B and 61D similarly by a double wall structure. Furthermore, in the above-described embodiment, the side surface 61A and the side surface 61D are integrally attached by the adhesive margin portion 62, and the flaps 75A and 75C and the flaps 75B and 75D are integrally attached by the adhesive margin portion 77. The lock hole 12 may be formed in the marginal part 62 and the flaps 75B and 75D, and the lock part 13 may be connected to the side face 61D and the flaps 75A and 75C so that assembly can be performed without gluing as in the second embodiment.

  Further, the present invention is not limited to the configuration of the above embodiment, and various modifications can be made.

  For example, in each of the embodiments described above, the lock structure of the present invention is applied to a packaging box that is a paper product. However, the present invention is not limited to a packaging box, and can be applied to various paper products to obtain the same functions and effects. It is.

It is a perspective view which shows the lock structure of the paper product of this invention. (A), (B) is sectional drawing which shows the locking process of a locking structure. It is a disassembled perspective view which shows the packaging box of 1st Embodiment using a lock structure. It is a perspective view which shows the assembly state of FIG. It is a top view which shows the blank of the packaging box of 1st Embodiment. (A) is a top view which shows the blank of a locking member, (B) is a top view which shows the blank of a cover body. (A), (B) is a perspective view which shows the packaging box of 2nd Embodiment using a lock structure. (A), (B) is another perspective view which shows the packaging box of 2nd Embodiment using the lock structure. It is a top view which shows the blank of the packaging box of 2nd Embodiment. (A), (B) is a perspective view which shows the packaging box of 3rd Embodiment using the lock | rock structure. (A) and (B) are the other perspective views showing the packaging box of a 3rd embodiment using a lock structure. It is a top view which shows the blank of the packaging box of 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... 1st surface 11 ... 2nd surface 12 ... Lock hole 13 ... Lock part 14 ... Continuous part 14a ... One side 14b ... Other side 15 ... 1st protrusion 16 ... 2nd protrusion 20, 40, 60 ... Packaging box (Paper products)
21 ... Bottom surface (first surface)
25A, 25C ... Upper wall surface (first surface)
32 ... Construction surface (second surface)
42 ... Folding surface (first surface)
41D ... Side surface (second surface)
65 ... Upper wall surface (first surface)
70: Cover surface (second surface)

Claims (4)

A paper product locking structure for connecting different first and second surfaces,
An elongated lock hole formed in the first surface;
A first protrusion protruding from one side of the continuous part; and a second protrusion protruding from the other side of the continuous part. The dimension (S1) from the tip of the second part to the other side of the continuous part is longer than the total length (L) of the lock hole, and the dimension (S2) from the tip of the second protrusion to one side of the continuous part is the lock. It consists of a lock part with a total length of the hole (L) or less,
The first protrusion is inserted into the lock hole, and the second protrusion on the other side is inserted into the lock hole in a state where one side of the continuous part is in contact with the edge of the lock hole. A lock structure for paper products, wherein the first surface and the second surface are connected. A side wall of a double wall structure comprising an outer wall surface, an upper wall surface continuous with the outer wall surface, and an inner wall surface continuous with the upper wall surface is erected on at least one side of the outer peripheral edge of the polygonal bottom surface In a packaging box in which a long lock hole is provided in at least one of the bottom surface and the upper wall surface, and different boxes can be connected by a separate lock member,
The lock member includes an erection surface extending toward a side wall of an adjacent box, a continuous portion continuously provided on both side edges of the erection surface, a first protrusion protruding from one side of the continuation portion, and the continuation portion. A second protrusion protruding from the side, the dimension (S1) from the tip of the first protrusion to the other side of the continuous part is longer than the total length (L) of the lock hole, and the tip of the second protrusion To a side of the continuous portion (S2) provided with a pair of lock portions having a total length (L) or less of the lock hole,
Different by inserting the first protrusion into the lock hole and inserting the second protrusion on the other side into the lock hole with one side of the continuous part abutting against the edge of the lock hole. A packaging box characterized in that the boxes can be connected. With a lid that has three or more side surfaces that are linearly continuous, forms a folding surface to be connected to the edge of the side surface of the other end on one side surface, and has an upper and lower opening formed integrally or separately. In a packaging box designed to close,
While providing a long lock hole in the folding surface,
A continuous portion continuously provided on an edge of a side surface to be superimposed on the outside of the folding surface, a first protrusion protruding from one side of the continuous portion, and a second protrusion protruding from the other side of the continuous portion, The dimension (S1) from the tip of the first protrusion to the other side of the continuous part is longer than the total length (L) of the lock hole, and the dimension from the tip of the second protrusion to one side of the continuous part ( S2) is provided with a lock portion having a length less than the total length (L) of the lock hole,
The first protrusion is inserted into the lock hole, and the second protrusion on the other side is inserted into the lock hole in a state where one side of the continuous part is in contact with the edge of the lock hole. A packaging box characterized in that the surface and the side surface of the other end are connected. In a packaging box provided with a peripheral wall composed of three or more side surfaces, the bottom surface being closed by a bottom cover formed integrally or separately, and the top surface being closed by a cover surface continuously provided on either side surface,
At least the upper part of at least one side surface excluding the side surface where the lid surface is continuously provided has a double wall structure including an outer wall surface, an upper wall surface continuous with the outer wall surface, and an inner wall surface continuous with the upper wall surface. In addition, while providing a long lock hole in the upper wall surface,
A continuous portion provided continuously to the edge of the lid surface corresponding to the lock hole, a first protrusion protruding from one side of the continuous portion, and a second protrusion protruding from the other side of the continuous portion, The dimension (S1) from the tip of the first protrusion to the other side of the continuous part is longer than the total length (L) of the lock hole, and the dimension (S2) from the tip of the second protrusion to one side of the continuous part. ) Is provided with a lock portion having a length equal to or less than the total length (L) of the lock hole,
The first protrusion is inserted into the lock hole, and the second protrusion on the other side is inserted into the lock hole while one side of the continuous part is in contact with the edge of the lock hole. A packaging box characterized in that a wall surface and a lid surface are connected, and an upper end opening surrounded by a side surface can be closed.

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