JP4663392B2 - Plug lock type packaging box - Google Patents

Description

  The present invention relates to a packaging box provided with an insertion lock mechanism that prevents a product from being pulled out or mixed with foreign matter.

  In general, for packaging of small and expensive products with high palatability, a body box is formed from the front plate, side plate, rear plate and bottom plate, the flap extending from the side plate is bent inward, and the lid extending from the rear plate A packaging box is used in which a plate is closed and overlapped with a flap, a lid piece extending from the front end of the lid plate is inserted in contact with the front plate, and an adhesive tape is attached from the lid plate to the front plate for sealing.

  By the way, in the packaging box as described above, it takes time to apply the tape at the time of packaging, and it also takes time for the purchaser of the product to cut the tape when opening the packaging box. As an easy packaging box, a packaging box described in Patent Document 1 below has been proposed.

  This packaging box is inserted with the lid piece extending from the front end of the lid plate inscribed in the front plate, and the front piece formed by cutting the front plate is bent along the base and intermediate ruled lines, It inserts in the insertion hole provided in the base end of the piece, the side part is mutually engaged and sealed, the front piece is cut along the cut line and opened.

JP 2002-347758 A

  However, in the packaging box as described in the above-mentioned Patent Document 1, since it can be opened if the front differential piece can be pulled out from the insertion hole, there is a problem that the safety with respect to the extraction of the product or the mixing of foreign matters is not sufficient. .

  In addition, a corner portion facing the front piece of the front plate may be caught in the distribution process, and a trouble may occur that the front plate may be bent.

  Therefore, the present invention is intended to provide an insertion lock type packaging box that can securely lock the lid plate in the closed state and is less likely to cause trouble due to catching in the distribution process.

  In order to solve the above-described problems, the present invention inserts a lid differential piece extending from the front end of the lid plate while inscribed in the front plate, and inserts the front differential piece formed by cutting the front plate along the base end and the middle ruled line. In the insertion lock type packaging box that is inserted into the insertion hole provided at the base end of the lid differential piece and sealed while being bent, a pair of insertion cuts in which the distal end side is directed inward to the lid differential piece, When the cut corner portion of the front plate facing the front insertion piece is inserted into the insertion cut, the inner edge of the cut corner portion of the front plate is engaged with the inner end portion of the insertion cut.

  In this packaging box, even if the front piece can be pulled out from the insertion hole, it cannot be opened unless the cut corners of the front plate can be pulled out from the insertion cut. It can be effectively prevented and safety is improved. In addition, since the cut edge of the front plate is suppressed by the lid piece, troubles due to catching in the physical distribution process can be prevented.

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

  This packaging box is formed from a paperboard blank as shown in FIG. In this blank, the side plate 2, the rear plate 3 and the side plate 2 are sequentially connected to one side of the front plate 1, and the passage piece 4 is connected to the other side of the front plate 1. Bottom plates 5 and 6 are connected to the lower ends of the front plate 1, the rear plate 3 and the side plate 2, a flap 7 is connected to the upper end of the side plate 2, and a lid plate 8 is connected to the upper end of the rear plate 3. Yes.

  The flap 7 is provided with an engaging portion 7a at the base portion that is the front side during assembly, and the lid piece 9 is provided with notches 9a on both sides of the base end with the ruled lines shifted from each other. An insertion hole 9b is provided in a convex cut.

  Also, the lid insert piece 9 is provided with a pair of insertion cuts 9c curved on both sides of the insertion hole 9b so that the tip side is directed inward, and the inner end portion is bent upward so as to be wound up. Thus, a pressing portion 9d is formed in the inner portion of the insertion cut 9c.

  A front differential piece 10 is formed at the upper portion of the front plate 1 by cutting, and ruled lines 10a and 10b are respectively provided at the base end and the middle of the front differential piece 10. Cuts 10c are made at both ends of the ruled line 10b while shifting the position from the ruled line, and arc-shaped cut lines 10d are made on the front plate 1 so as to connect both ends of the ruled line 10a.

  A portion of the front plate 1 facing the front differential piece 10 is a cut corner portion 1a, and a projection 1b is provided on the inner edge thereof. The protrusion 1b bulges in an arc shape from above to below, and its lower edge is cut horizontally to form a hook shape.

  As shown in FIGS. 2 and 3, the front plate 1, the pair of side plates 2 and the rear plate 3 are folded into a rectangular tube shape and the passage pieces 4 are opposite to assemble the blank as described above and wrap the product. The bottom plate 5 and 6 are attached to the side plate 2 and the bottom is closed to form a body box. After the product is stored in the body box, the pair of flaps 7 are folded inward and the lid plate 8 is closed.

  At this time, when the lid piece 9 is inscribed in the front plate 1 and inserted between the front plate 1 and the flap 7, the notches 9 a at both ends of the lid piece 9 are engaged with the engaging portions 7 a of the flap 7. Then, when the cut corner 1a of the front plate 1 is inserted into the insertion cut 9c, the protrusion 1b engages with the inner end of the insertion cut 9c.

  Further, when the front piece 10 is bent along the base end and the middle ruled lines 10a and 10b and inserted into the insertion hole 9b of the lid piece 9, the front piece 10 is cut as shown in FIG. 10c engages with both ends of the insertion hole 9b, and the cover plate 8 is sealed in a state where the lock is applied in three stages.

  In such a sealed packaging box, if you try to open it without leaving any trace in the logistics process, you must release the above three stages of locks in the reverse order of sealing, without breaking the lock part. Since it is very difficult to open the package, it is possible to effectively prevent the product from being extracted or mixed with foreign matter.

  Further, since the cut corner portion 1a of the front plate 1 is suppressed by the pressing portion 9d of the lid piece 9, the cut corner portion 1a is hooked on the wall surface of the cargo bed in the physical distribution process, and the front plate 1 is bent so as to bend, Troubles that are torn are also prevented.

  In addition, the area of paper required for manufacturing does not increase, and it can be boxed in the same way as a conventional box, eliminating the need for tape sticking for sealing during product packaging work, and the trouble of locking It will not take.

  On the other hand, when the merchandise purchaser opens the packaging box, as shown in FIG. 5, when the portion inside the cut line 10d of the front plate 1 is pushed to break the cut line 10d, the front piece 10 Is cut from the front plate 1 and opened, so that the lid plate 8 can be easily opened.

  In the above embodiment, a rectangular packaging box is exemplified, but the same configuration can be applied to a hexagonal or octagonal packaging box in which a plurality of side plates are provided on both sides.

The figure which shows the blank of the packaging box which concerns on embodiment of this invention The perspective view which shows the assembly sealing process of a packaging box same as the above Main part enlarged perspective view The perspective view which shows the sealing state same as the above The perspective view which shows an open state same as the above

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front plate 1a Cut corner part 1b Protrusion 2 Side plate 3 Rear plate 4 Passage piece 5, 6 Bottom plate 7 Flap 8 Cover plate 9 Lid piece 9a Cut 9b Insert hole 9c Insert cut 9d Pressing part 10 Front piece 10a, 10b Ruled line 10c Cut 10d Cut line

Claims (4)

  A box is formed from the front plate 1, the side plate 2, the rear plate 3 and the bottom plates 5, 6, the flap 7 connected to the side plate 2 is bent inward, and the lid plate 8 connected to the rear plate 3 is closed to close the flap 7. The front cover 1 is formed by cutting the front plate 1 into the front plate 1 along the ruled lines 10a and 10b. In an insertion lock type packaging box that is bent and inserted and sealed in an insertion hole 9b provided at the base end of the lid differential piece 9, a pair of insertion cuts 9c with the distal end side inward toward the lid differential piece 9 Is inserted, and the corner 1a of the front plate 1 facing the front piece 10 is inserted into the insertion cut 9c, the inner edge of the cut 1a of the front plate 1 is engaged with the inner end of the insertion 9c. A plug-in type packaging box characterized by matching.   The insertion lock type packaging box according to claim 1, wherein the notches 9 a put on both sides of the proximal end of the lid piece 9 are engaged with the flap 7.   The insertion lock type packaging box according to claim 1 or 2, wherein the notches 10c inserted on both sides of the middle ruled line 10b of the front insertion piece 10 are engaged with the lid insertion piece 9. Plug lock type packaging box.   4. The insertion lock type packaging box according to claim 3, wherein the front differential piece 10 is cut along the cut line 10d extending on both sides thereof and opened.

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