JP2009073536A - Interlocking type packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interlocking type packaging box which is easy to seal and hardly allows cover plates to be removed. <P>SOLUTION: According to the structure of the interlocking type packaging box, the pairing cover plates 7 extending from mutually opposed side plates 2 of a peripheral wall 1 each have slits 9 formed at a distal end thereof, and by designating one side of the slit 9 as external overlapping pieces 10 and the other side of the slit as internal overlapping pieces 11, the slits 9 of the cover plates 7 are fitted to each other, followed by meshing the cover plates 7 with each other such that the external overlapping pieces 10 are arranged outside and the internal overlapping pieces 11 are arranged inside, to thereby seal the box. Herein each slit 9 formed in each cover plate 7 consists of a series of a tip cut portion 9a on an entering side, a bent cut portion 9b extending sideways, and a depth cut portion 9c extending toward a proximal end of the cover plate 7. Then the tip cut portions 9a of the mutually opposed cover plates 7 are positioned to each other by twisting the peripheral wall 1, and the tip of the internal overlapping piece 11 is abutted on a rear surface of the external overlapping piece 10, followed by closing the cover plates 7. As a result the internal overlapping piece 11 is elastically distorted beginning from a bottom of the depth cut portion 9c, and at the same time both the cover plates 7 are meshed with each other, followed by recovering the peripheral wall 1, to thereby mesh each cover plate 7 with the bent cut portion 9b of the counterpart cover plate 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a meshing lock type packaging box that meshes and seals a pair of lid plates extending from side plates of a peripheral wall.

  Conventionally, as shown in FIG. 9, a notch 53 is made at the tip of a pair of cover plates 52 extending from a side plate 51 of the peripheral wall 50, one side of the cut 53 is an outer polymerized piece 54, and the other side is an inner polymerized piece. 55, a notch 53 of a pair of cover plates 52 is inserted into each other, and the engagement plate made of corrugated cardboard is engaged and sealed so that the outer polymerization pieces 54 are outside and the inner polymerization pieces 55 are inside. A type packaging box is known (see Patent Document 1 below).

  In this packaging box, since the material is used so that the step is a horizontal line in the width direction of the lid plate 52, when the lid plate 52 is closed, the inner overlapping piece 55 is flexibly bent to 52 can be engaged with each other.

Japanese Utility Model Publication No. 2-90216

  By the way, when the engagement lock as described above is applied to a grooving type corrugated cardboard box using a material such that the step is a vertical line extending over the front end and the base end of the cover plate, the inner polymerization piece is Almost does not flex and hinders sealing.

  As a countermeasure, it is conceivable that an auxiliary ruled line in the width direction is put in the cover plate, and when the cover plate is closed, the cover plate is once bent along the auxiliary ruled line and then restored.

  However, if such an auxiliary ruled line is inserted, there is a risk that the lid plate with folds will rise after sealing, and the engagement of the lid plate may be released.

  Therefore, the present invention is intended to provide an engagement lock type packaging box that is easy to seal and is difficult to disengage the cover plate.

  In order to solve the above-described problems, the present invention provides a cut at the ends of a pair of cover plates extending from opposing side plates of the peripheral wall, one side of the cut being an outer polymerization piece, and the other side being an inner polymerization piece. In the mesh-locking packaging box in which the notches of the pair of lid plates are inserted into each other so that the outer polymerized pieces are outside and the inner polymerized pieces are inside, the lid plates are engaged with each other and sealed. In the notch of the plate, a leading edge part on the inlet side, a curved cutting part directed to the side, and a depth cutting part extending to the base end side of the lid plate are continuously provided, and the peripheral wall is twisted to make the leading edge of the opposite lid plate When the position of the part is aligned, the tip of the inner polymerization piece is brought into contact with the back surface of the outer polymerization piece, and the lid plate is closed, the inner polymerization piece flexes elastically from the base on the side of the back cut portion, and the lid plates engage with each other. The peripheral wall was restored so that the cover plate bites into the bent part.

  In addition, corner cut edges are formed on the outer polymer pieces and the inner polymer pieces, and the leading edge portions of the opposing cover plates are aligned with each other by being guided by the corner cut edges as the cover plate falls down.

  Further, the outer polymer piece of the cover plate is protruded from the inner polymer piece, and the tip of the inner polymer piece comes into contact with the back surface of the outer polymer piece as the cover plate falls down.

  In the mesh lock type packaging box according to the present invention, by providing a back cut portion in the cut of the cover plate, when the cover plate is closed, the inner polymerization piece flexes flexibly from the base on the back cut side. The lid plates can be easily engaged with each other.

  Further, since the cover plate is engaged with the curved cut portion with the restoration of the peripheral wall, it is difficult for the cover plate to be disengaged and the cover plate can be reliably sealed.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  This packaging box is formed from a cardboard blank as shown in FIG. In this blank, a pair of side plates 2 and end plates 3 constituting the peripheral wall 1 are alternately connected, and a passage piece 4 is continuously provided outside the side plate 2 located at the end. The step of the corrugated board is a vertical row extending in the height direction of the peripheral wall 1.

  A bottom plate 5 is connected to the lower end of the side plate 2, a bottom receiving piece 6 is connected to the lower end of the end plate 3, a cover plate 7 is connected to the upper end of the side plate 2, and a cover receiving piece 8 is connected to the upper end of the end plate 3. Each one is connected.

  Cuts 9 are made at two positions at the front end of the cover plate 7 at intervals. The inner side of the notch 9 of one cover plate 7 is an outer polymerization piece 10, and the outer side is an inner polymerization piece 11. Further, the outer side of the notch 9 of the other lid plate 7 is an outer polymerization piece 10 and the inner side is an inner polymerization piece 11.

  Here, as shown in FIG. 2 in a state where both the cover plates 7 are opposed to each other, each notch 9 is provided with a leading edge 9a, a bent edge 9b, and an inner edge 9c continuously from the entrance side. It has been. The leading edge portion 9a extends in parallel to the side edge of the lid plate 7, and the bent portion 9b of each lid plate 7 faces the same side so as to be opposite to each other at the opposite lid plate 7, The part 9 c is directed toward the base end side of the lid plate 7.

  In each lid plate 7, the notches 9 are arranged such that the distance between the side edge of the lid plate 7 and the central portion of the curved cut portion 9 b becomes the reference distance L. The outer polymer piece 10 protrudes from the inner polymer piece 11, and the corners facing the notches 9 of the outer polymer piece 10 and the inner polymer piece 11 are cut obliquely to form a corner edge 12.

  As shown in FIG. 3, to assemble the blank as described above and wrap the product, each pair of side plates 2 and end plates 3 is folded into a square tube shape, and the passage piece 4 is attached to the opposite end plate 3. A peripheral wall is formed by pasting on the back surface, the bottom receiving piece 6 and the bottom plate 5 are sequentially closed, and the bottom surface is closed. And goods are stored in a box from the opened top.

  Next, as shown in FIG. 4, when the lid receiving piece 8 and the lid plate 7 are successively laid down inwardly, as shown in FIG. As shown in FIG. 5, the leading ends of the superposed pieces 11 abut on each other, and the inner superposed pieces 11 are elastically bent from the base on the back cut portion 9c side, and are guided by the corner cutting edges 12, and the facing cover plate 7 is The peripheral wall 1 is twisted into a parallelogram shape so as to be displaced.

  Subsequently, when the lid plate 7 is further laid down, as shown in FIG. 6, the position of the leading edge 9a of the opposed lid plate 7 automatically matches, and as shown in FIG. The cover plates 7 gradually mesh with each other so as to be sandwiched between the polymerized piece 10 and the inner polymerized piece 11.

  Thereafter, as shown in FIG. 7 and FIG. 8 (c), when the cover plate 7 is completely laid down until it becomes horizontal, the peripheral wall 1 is restored by the repulsive force, and the shift of the facing cover plate 7 is also eliminated. The cover plate 7 bites into the other party's curved cut portion 7b, the engagement state of the cover plates 7 is maintained, and sealing is completed.

  In the packaging box as described above, by providing the depth cut portion 9c in the notch 9 of the lid plate 7, when the lid plate 7 is closed, the inner polymerization piece 11 is flexibly bent from the root on the depth cut portion 9c side. As a result, the lid plates 7 can be easily engaged with each other without inserting auxiliary ruled lines in the width direction in the lid plate 7.

  Further, since the cover plate 7 is engaged with the curved cut portion 9b along with the restoration of the twisted peripheral wall 1, the cover plate 7 is not disengaged unless a force is intentionally applied. Even if the sealing material is not used, sealing can be performed reliably and the packaging cost can be reduced.

  In addition, the packaging box can be manufactured with the same flexogluer as a conventional grooving cardboard box, and can be assembled and packaged and sealed in the same procedure, thus increasing the manufacturing cost. There is no reduction in the efficiency of the packaging operation.

  In the above-described embodiment, two cuts 9 are provided in each cover plate 7. However, one or more cuts 9 are provided in each cover plate 7, and the cuts 9 are used as boundaries. The polymer pieces 10 and the inner polymer pieces 11 may be alternately formed.

  In addition, the leading part 9a, the curved part 9b, and the back part 9c of the notch 9 are linear, and these are continuous through the bent part, but the leading part 9a, the curved part 9b, and the back part The cut portion 9c is made of a curve, and these may be continuous to form the cut 9.

The figure which shows the blank of the meshing lock type packaging box which concerns on this invention Enlarged view showing the tip of the lid plate The perspective view which shows an open state same as the above Perspective view showing the sealing process Plan view showing the initial state of the sealing process Plan view showing the intermediate state of the sealing process Plan view showing the final state of the sealing process (A) AA line sectional view of FIG. 5, (b) BB line sectional view of FIG. 6, (c) CC line sectional view of FIG. The perspective view which shows the sealing state of the conventional meshing lock type packaging box

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Perimeter wall 2 Side plate 3 End plate 4 Passage piece 5 Bottom plate 6 Bottom receiving piece 7 Lid plate 8 Lid receiving piece 9 Notch 9a Cutting edge 9b Bent cutting portion 9c Back cutting portion 10 Outer polymerization piece 11 Inner polymerization piece 12 Corner cutting edge

Claims (3)

A notch (9) is made at the tip of a pair of cover plates (7) extending from the opposing side plate (2) of the peripheral wall (1), one side of the notch (9) is the outer polymerized piece (10), and the other side The inner polymerized piece (11), the notches (9) of the pair of lid plates (7) are inserted into each other, and the outer polymerized piece (10) is on the outer side and the inner polymerized piece (11) is on the inner side. In the mesh lock type packaging box that seals by sealing the plates (7) together,
In the notch (9) of the pair of lid plates (7), a front notch portion (9a) on the inlet side, a curved cut portion (9b) directed to the side, and a depth cut extending to the proximal end side of the lid plate (7) The portion (9c) is continuously provided, the peripheral wall (1) is twisted, the position of the tip (9a) of the facing lid plate (7) is aligned, and the inner polymerization piece ( When the tip of 11) is brought into contact and the cover plate (7) is closed, the inner overlapping piece (11) is elastically bent from the root on the side of the back cut portion (9c), while the cover plates (7) are engaged with each other, A meshing lock type packaging box, wherein the peripheral wall (1) is restored, and the lid plate (7) is engaged with the curved cut portion (9b).   The interlocking lock type packaging box according to claim 1, wherein a corner cutting edge (12) is formed on the outer polymerization piece (10) and the inner polymerization piece (11), and the corner cutting edge ( A meshing lock type packaging box characterized in that the position of the leading edge (9a) of the facing cover plate (7) is aligned by being guided by 12).   3. The mesh-locking type packaging box according to claim 1 or 2, wherein the outer polymerization piece (10) is protruded from the inner polymerization piece (11), and the outer polymerization piece (10) is caused by the fall of the cover plate (7). A meshing lock type packaging box, wherein the tip of the inner polymerization piece (11) is in contact with the back surface of the inner locking piece.

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