JP5475600B2 - Box bottom lock - Google Patents

Description

  The present invention relates to a structure for closing and locking the bottom of a box without using an adhesive tape or staples.

  For example, as a bottom assembly lock that closes the bottom surface of the box without using an adhesive tape or the like, the following Patent Document 1 extends from each pair of side walls 51 and 52 forming the outer periphery of the box as shown in FIG. The fixed bottom plates 53 and 54 are described as being superposed and fixed.

  In this bottom assembly lock, inclined edges 53a, 54a are formed obliquely on one side of the bottom plates 53, 54, and valley fold lines 53b, 54b extending obliquely from the base end corner are placed on the other side, Back overlap pieces 53c and 54c are formed on the outside thereof.

  Then, when the bottom of the box is closed and locked, as shown in FIG. 10A, the pair of bottom plates 53 are folded so as to be closed, and then, as shown in FIG. 54 is closed so as to be closed and pushed into the box together with the bottom plate 53.

  Accordingly, the bottom plate 54 is bent along the valley fold line 54 b so that the back overlap piece 54 c rises, and the other side portion of the bottom plate 54 exceeds the inclined edge 53 a of the bottom plate 53 as shown in FIG. If it sinks into the back side, the bending of the back overlap piece 54c will be restored, and the bottom plates 53 and 54 will be held together and fixed.

  The box has short cover plates 55 and 56 extending from the side walls 51 and 52. When the box is used, an article such as vegetables is stored in the normally rotated box and the cover plates 55 and 56 are closed. Then, the tip corner portion of the cover plate 56 is engaged with the extraction hole of the cut piece 55 a formed in the cover plate 55.

JP 2005-280765 A

  However, the bottom lock as described above has a problem that the bottom surface strength is not sufficient and the bottom may be pulled out, and that the outer periphery of the box is easily deformed when the box is twisted.

  In addition, when using flexoglure to form a slanted edge on the bottom plate when manufacturing the box, only flexoglure with a dropping function can be used. However, there is a problem that the part to be pressed with the kicker is limited.

  Accordingly, an object of the present invention is to improve the bottom strength of the box and the resistance to twisting, and to make it easy to process with various flexogluers.

  In order to solve the above-described problems, the present invention provides a bottom assembly lock for a box in which the bottom plates extending from each pair of side walls forming the outer periphery of the box are overlapped and fixed so as to restrain each other. The side edges of the box are along the ridge line of the box, and a valley fold line extending obliquely from the base end corner is put on one side of each bottom plate, and a surface piece is formed on the outside thereof, and at least one bottom plate In the other side, a valley fold line extending diagonally from the base end corner is put, a back overlap piece is formed on the outside, and the 4 bottom plates are arranged in the circumferential direction so that the bottom plate having the back overlap is the last. The bottom plate is pushed into the box as it bends along the valley fold line, and the top piece of the bottom plate folded first and the back piece of the bottom plate folded last along the valley fold line. The other side of the bottom plate that was folded last is folded first. Push the back side of one side of the bent bottom plate is to that so as to restore the bending of the bottom plate.

  In addition, a hook-like locking cut is made at the tip of the bottom plate extending from the pair of side walls, and these locking cuts are engaged with each other at the center of the bottom surface of the box.

  Furthermore, a relief piece is provided facing the inclined entrance side of the locking notch, an oblique valley fold line is put at the base end of the relief piece, and the relief piece is bent along the valley fold line, The locking cuts were engaged to restore the escape piece.

  In the bottom assembly lock of the box according to the present invention, by bending the bottom plate along the valley fold line without cutting off one side portion of the bottom plate obliquely, it can be sequentially folded in the circumferential direction, Since the side edge of the bottom plate located in the box abuts against the inner surface of the side wall to restrict the deformation of the box, excellent bottom strength and resistance to twisting can be obtained.

  Further, when manufacturing a box, flexoglure without a function of dropping can be used, and the bottom edge of the bottom plate is long, so that the portion to be pushed by the kicker is not limited.

  Furthermore, by engaging a hook-shaped locking cut inserted at the tip of the opposite bottom plate, the strength of the bottom surface can be improved, and the bottom plate is bent to prevent the contents from being extracted from the bottom surface of the box. You can also.

  In addition, the escape piece facing the slanted inlet side of the locking cut prevents the formation of a recess at the end of the bottom plate as much as possible without impairing the ease of meshing, so that it can be fed by a kicker in the manufacturing process, etc. The effect on it can be avoided.

The figure which shows the blank of the cardboard box which employ | adopted the bottom assembly lock which concerns on this invention The perspective view which shows the bottom assembly process same as the above from the bottom side The perspective view which shows the bottom assembly process same as the above from the bottom side The perspective view which shows the bottom assembly process same as the above from the top side The enlarged view which shows the meshing process of the center meshing part same as the above from the box inner side The perspective view which shows the bottom assembled state same as the above from the top side A perspective view showing the bottom assembled state from the bottom side The enlarged view which shows the meshing state of the center meshing part same as the above from the box inner side The enlarged view which shows the meshing state of a center meshing part same as the above from the box outer side (A), (b), (c) The perspective view which shows the bottom assembly process of the conventional bottom assembly lock sequentially from the bottom face side.

  Hereinafter, an embodiment of a cardboard box having a bottom lock according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, in this cardboard box blank, long side walls 1 and short side walls 2 are alternately provided, and a passage piece 3 is provided outside one side wall 1. . Side walls 2 sequentially connected to the side wall 1, bottom plates 4, 5, 6, 7 are sequentially provided at the lower ends of the other side wall 1 and the side walls 2, and lid plates 8, 9 are provided at the upper ends of the side walls 1, 2. Each one is connected.

  The bottom plates 4, 5, 6, 7 and the cover plates 8, 9 are formed in a rectangular shape so that both side edges are along the ridge line of the box, similarly to a normal grooving cardboard box.

  Here, the upper and lower contours of the blank are formed by cutting with a corrugator, and a horizontal ruled line that becomes a ridgeline of the box is also entered with the corrugator. Further, by subsequent processing with flexogluer, vertical grooves between the bottom plates 4, 5, 6, 7 and the cover plates 8, 9 are formed, and the contour of the passage piece 3 is formed.

  And on one side of each bottom plate 4, 5, a valley fold line 10 extending obliquely from the base end corner is put, and a surface piece 11 is formed on the outside thereof, and on the other side of the bottom plate 7, A valley fold line 12 extending obliquely from the base end corner is inserted, and a back overlap piece 13 is formed on the outside thereof.

  Further, a locking notch 14 is inserted in the center of the tip of the bottom plates 4 and 6, and the locking notch 14 is inclined at the inlet side, and a step portion parallel to the leading edge of the bottom plates 4 and 6 on the back side. And, it is in the shape of a bowl provided with a vertical cut portion extending vertically to the entrance side and the back side.

  If the locking notches 14 have such a shape, the locking notches 14 of the bottom plates 4 and 6 can be moved as described later even if the processing position of the flexo-glue with respect to the outline of the blank is slightly deviated from a predetermined position. Can be engaged without any problem.

  Further, a relief piece 15 is provided on one side of the inclined entrance portion of the locking cut 14, and a valley fold line 16 extending in an oblique direction is provided at the proximal end of the relief piece 15.

  Note that the valley fold lines 10, 12, and 16 are lead rules having cuts so as to bend in the opposite direction to the ridge line of the box, which is a ruled ruled from the back side of the cardboard, but from the front side of the cardboard. It may be a ruled rule.

  Moreover, in order to confirm the shift | offset | difference of the processing position in a flexo gluer with respect to the outline of a blank, it is good to put the test | incision notch 17 in the front-end | tip of the baseplates 5 and 6.

  A corrugated cardboard box made of such a blank is folded flat along a ruled line at the boundary between the side walls 1 and 2 by flexo-glue, and a flat fold is formed by pasting the passage piece 3 on the back surface of the opposite side wall 2. It is delivered to the user and stored.

  On the other hand, when using this cardboard box, as shown in FIG. 2, the four bottom plates 4, 5, 6, and 7 are bent so as to be sequentially overlapped in the circumferential direction.

  Next, as shown in FIG. 3, along with the bending along the valley fold lines 10, 12, the bottom plates 4, 5, 6, 7 are pushed into the box, and the surface piece 11 of the bottom plate 4 that is bent first, The bottom plate 7 of the bottom plate 7 that is bent last is folded in the direction of raising along the valley fold lines 10 and 12, and the bottom plate 7 is further moved into the box while the back plate 13 is slid in contact with the back surface of the surface plate 11. Push into.

  Then, as shown in FIG. 4, when the other side portion of the bottom plate 7 bent last is completely pushed into the back side of the one side portion of the bottom plate 4 bent first, the folding of the back overlap piece 13 is restored.

  After that, as shown in FIG. 5, the escape piece 15 is bent so as to be pushed along the valley fold line 16, and the bottom plates 4, 5, 6, and 7 are returned to the horizontal direction as shown in FIGS. Then, the folding of the surface piece 11 is restored, and at the center of the bottom of the box, as shown in FIGS. 8 and 9, the locking notches 14 of the bottom plates 4 and 6 are engaged, and the folding piece 15 is bent. Restore.

  In the box bottom lock as described above, the bottom plates 4, 5, 6 and 7 are bent along the valley fold lines 10 and 12 without obliquely cutting off one side of the bottom plates 4, 5, 6 and 7. As a result, it can be sequentially folded in the circumferential direction.

  And in this bottom assembled state, the side edges of the bottom plates 4, 5, 6 and 7 located in the box come into contact with the inner surfaces of the side walls 1 and 2 to regulate the deformation of the box. Resistance can be obtained.

  In addition, when manufacturing a box, you can use flexogullers that do not have a missing function, so there is no limitation on the flexogullers to be used, and the bottom edges of the bottom plates 4, 5, 6, and 7 are long, so the parts you press with the kicker Is not limited.

  Furthermore, by engaging the hook-like locking cuts 14 inserted at the tips of the opposed bottom plates 4 and 6, the strength of the bottom surface can be improved, and the bottom plates 4, 5, 6 and 7 are bent to form a box. It is also possible to prevent mischief by pulling out the contents from the bottom surface.

  In addition, the escape piece 15 facing the inclined entrance side of the locking cut 14 prevents the formation of a recess at the tip of the bottom plates 4 and 6 as much as possible without impairing the ease of meshing. It is possible to avoid the influence on the feeding by the kicker.

  In addition, the process can be simplified compared to a one-touch bottom corrugated cardboard box that requires processing by die-cutting, and even if the grade of corrugated cardboard used as a material is lowered compared to the conventional bottom-mounted lock described above. Therefore, the cost can be reduced.

  In the above embodiment, only the bottom plate 7 is provided with the valley fold line 12 and the back overlap piece 13, but in addition to this, the other bottom plates 4, 5, 6 have the valley fold line 12 and the back side. A heavy piece 13 may be provided. However, if the bottom fold lines 12 and the back overlapping pieces 13 are provided on all the bottom plates 4, 5, 6, and 7, resistance to twisting is reduced, so it is preferable to keep the number of sheets at about two.

1, 2 Side wall 3 Passage piece 4, 5, 6, 7 Bottom plate 8, 9 Cover plate 10 Valley fold line 11 Table weight piece 12 Valley fold line 13 Back overlap piece 14 Locking cut 15 Relief piece 16 Valley fold line 17 Inspection cut Included

Claims (3)

  In the bottom assembly lock of the box, in which the bottom plates (4, 5, 6, 7) extending from each pair of side walls (1, 2) forming the outer periphery of the box are overlapped and fixed so as to hold each other, the bottom plate (4,5,6,7) Both side edges shall be along the ridgeline of the box, and on one side of each bottom plate (4,5,6,7), a valley fold line extending obliquely from the base end corner ( 10) is inserted, a surface piece (11) is formed on the outer side, and a valley fold line (12) extending obliquely from the base end corner is put on the other side of at least one bottom plate (7), Four bottom plates (4, 5, 6, 7) are sequentially formed in the circumferential direction so that the back plate (13) is formed on the outside and the bottom plate (7) having the back plate (13) is the last. The bottom plate (4,5,6,7) is pushed into the box along with the bending along the valley fold line (10,12) and the surface piece (11) of the first bent bottom plate (4) ) And the last folded back plate (13) of the bottom plate (7), bent in the direction along the valley fold line (10, 12), and finally folded The other side of the bottom plate (7) is pushed into the back side of one side of the first folded bottom plate (4) to restore the folding of the bottom plate (4, 5, 6, 7). Bottom lock.   A hook-like locking notch (14) is inserted at the tip of the bottom plate (4, 6) extending from the pair of side walls (1), and these locking notches (14) are bitten at the center of the bottom of the box. The box bottom lock according to claim 1, wherein the box is locked.   A relief piece (15) is provided facing the inclined entrance side of the locking cut (14), an oblique valley fold line (16) is placed at the base end of the relief piece (15), and the relief piece ( 3. The escape piece (15) is restored by meshing the locking cuts (14) of the bottom plate (4, 6) while bending 15) along the valley fold line (16). The box bottom lock described in 1.

Images