JP2016150753A - Easily opened packing box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-door type packing box easily opened and capable of surely maintaining the closed state of an outer flap in a sealed state.SOLUTION: A packing box includes outer flaps 6 and 7 in a pair of side walls 1 and an inner flap 8 in the other side wall 2 in a continuous manner, insertion pieces 9 and 10 extending from the tips of the outer flaps 6 and 7, and slits 11 in the inner flap 8, a finger book projection 12 is provided at the tip of the outer flap 6 by notching the insertion piece 9, and an engaging projection 13 is provided at the tip of the outer flap 7 by notching the insertion piece 10. When sealing, the insertion pieces 9 and 10 are inserted into the slits 11 while engaging the engaging projection 13 with the engaging hole 14 of the pull-out trace of the finger hook projection 12, and the outer flaps 6 and 7 are overlapped with the inner flap 8 to butt each other. When opening, by engagement of the engaging projection 13 with the engaging hole 14, the outer flaps 6 and 7 are interlockingly opened.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a packaging box that can be easily opened in a double door format.

  As a double-sided packaging box, the following Patent Document 1 describes a packaging box as shown in FIG. This packaging box has an outer flap 53 connected to the upper ends of the pair of side walls 51 and an inner flap 54 connected to the upper ends of the other pair of side walls 52 of the pair of side walls 51, 52. An insertion piece 55 is extended from the tip of 53, a slit 56 is inserted into the inner flap 54 from the tip, and a finger projection 57 is provided at the tip of one outer flap 53 by an arcuate cut into the insertion piece 55. It is said that

  When sealing the packaging box, the inner flap 54 is bent in the horizontal direction, the outer flap 53 is folded on the upper surface of the inner flap 54 and brought into contact with each other, the insertion piece 55 is bent from the outer flap 53 and inserted into the slit 56. Like that. At this time, the protruding finger hook protrusion 57 is placed on the upper surface of the other outer flap 53.

  Further, when opening the packaging box, a finger is put on the finger hooking protrusion 57 and opened so as to cause one outer flap 53, and the insertion piece 55 at the tip is pulled out from the slit 56, and then the other Is opened to cause the outer flap 53, and the insertion piece 55 at the tip thereof is pulled out from the slit 56, and then the inner flap 54 is opened to open the top surface.

Japanese Utility Model Publication No.54-2528

  However, in the packaging box as described above, when opening one of the outer flaps 53, first the opening piece 55 is pulled out from the slit 56, and then the other outer flap 53 is opened. There is a problem that it is necessary to pull out the insertion piece 55 at the tip from the slit 56, which takes time and effort.

  In addition, in the sealed state, the butted outer flap 53 is likely to float, and in order to reliably maintain the sealed state, it may be necessary to fix the butted portion of the outer flap 53 by attaching a tape or by light glue.

  In view of this, the present invention is intended to provide a double-sided packaging box that can be easily opened and that the closed state of the outer flap is reliably maintained in the sealed state.

  In order to solve the above-mentioned problems, the present invention has an outer flap connected to a pair of side walls, an inner flap connected to the other side wall, an insertion piece extended from the tip of the outer flap, and a slit formed in the inner flap. In the packaging box in which the inner flap is bent, the outer flap is folded on the inner flap, butted against each other, and the insertion piece bent from the outer flap is inserted into the slit and sealed, one of the outer flaps extending from the pair of side walls is sealed. A finger hook projection is provided at the tip of the flap by cutting into the insertion piece, and an engagement projection is provided at the tip of the other outer flap by cutting into the insertion piece.

  Then, when sealing, as the insertion piece is bent from one outer flap, an engagement hole is opened in the extraction trace of the finger hook protrusion, and the engagement protrusion of the other outer flap is engaged with the engagement hole. The insertion piece was inserted into the slit.

  Also, when opening, when you put your finger on the finger hooking projection and begin to open one outer flap, the other outer flap also starts to open due to the engagement between the engaging projection and the engaging hole, and the insertion piece comes out of the slit. After that, the engaging protrusion is detached from the engaging hole.

  Further, the insertion piece at the tip of the one outer flap is provided with a notch lock portion at both ends of the base portion, and in the sealed state, the lock portion of the insertion piece is engaged with the edge facing the slit of the inner flap. In this case, one outer flap is fixed in a state where the other outer flap is pressed by the finger hooking projection, and both the outer flaps are locked in the closed state.

  In the packaging box according to the present invention, at the time of opening, only by opening one outer flap, the other outer flap also starts to open by the engagement of the engagement protrusion and the engagement hole, and after the insertion piece comes out of the slit, Since the engaging protrusion is detached from the engaging hole, both the outer flaps can be opened by one operation, and the inserted piece can be pulled out from the slit of the inner flap, so that it can be easily opened.

  In the sealed state, the locking part provided at the base of the insertion piece of one outer flap engages with the edge facing the slit of the inner flap, and one outer flap holds the other outer flap with the finger hook projection. Since both outer flaps are fixed in the closed state and locked in the closed state, a reliable sealing property can be obtained.

The figure which shows the blank of the easy-open packaging box which concerns on 1st Embodiment of this invention The perspective view which shows the sealing (opening) process same as the above Top vertical side 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 Upper perspective view of an easy-open packaging box according to a second embodiment of the present invention The perspective view of the easy-open packaging box which concerns on 3rd Embodiment of this invention The perspective view which shows the opened state of the packaging box which concerns on patent document 1

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

  The packaging box according to the first embodiment of the present invention is formed from a cardboard blank as shown in FIG. In this blank, each pair of side walls 1 and 2 is alternately connected, and a passage piece 3 is connected to the outer end of one side wall 2. A bottom plate 4 is connected to the lower ends of the pair of side walls 1, and a bottom plate 5 having a folding line for folding is connected to the lower ends of the other pair of side walls 2.

  Of the upper ends of the pair of side walls 1, an outer flap 6 is connected to the upper end of one side wall 1, and an outer flap 7 is connected to the upper end of the other side wall 1. Further, an inner flap 8 is connected to the upper end of the side wall 2.

  The insertion piece 9 is connected to the middle end portion of one outer flap 6, and the insertion piece 10 is connected to the middle end portion of the other outer flap 7, respectively. To the slit 11.

  A finger hooking protrusion 12 is provided at the tip of one outer flap 6 by an arc-like cut into the insertion piece 9, and a U-shaped cut to the insertion piece 10 is provided at the tip of the other outer flap 7. The engagement protrusion 13 is provided by the insertion. The notch of the finger hook projection 12 opens as an engagement hole 14 at the time of sealing.

  Further, the insertion piece 9 is wider than the insertion piece 10 so as to protrude on both sides, and the maximum width of the insertion piece 9 is larger than the dimension between both ends of the opposing slits 11 at the time of sealing. At both ends of the base portion of the insertion piece 9, lock portions 15 by notches are provided.

  To assemble the blank and wrap the article, as shown in FIG. 2, each pair of side walls 1 and 2 is bent into a square tube shape, and the passage piece 3 is attached to the opposite side wall 1 to form a peripheral wall. Then, the two bottom plates 4 and 5 are folded and bonded one by one to form a bottom wall.

  Then, after storing the article in the box and bending the opposing inner flap 8 in the horizontal direction, as shown in FIG. 3, the outer flap 7 is folded inward and the insertion piece 10 at the tip thereof is inserted. Then, the outer flap 6 is bent inward, and the insertion piece 9 at the tip is bent downward, and the engagement hole 14 is opened in the extraction trace of the finger hooking protrusion 12.

  Then, while engaging the engagement protrusion 13 of the outer flap 7 with the engagement hole 14, the insertion pieces 9, 10 are inserted into the slit 11, and the outer flaps 6, 7 are inserted into the inner flap 8 as shown in FIG. Overlay on top and butt against each other.

  As a result, the lock portions 15 at both ends of the base portion of the insertion piece 9 are engaged with the edge facing the slit 11 of the inner flap 8, and one outer flap 6 presses the other outer flap 7 with the finger hooking projection 12. The two outer flaps 6 and 7 are locked so as not to be lifted, and a reliable sealing performance is obtained.

  In addition, the displacement of the insertion piece 9 with respect to the slit 11 is prevented, and a deformation phenomenon in which the peripheral wall is distorted into a parallelogram in plan view due to an external force during carrying is prevented.

  Further, when opening the packaging box, a finger is put on the finger hooking protrusion 12 and one outer flap 6 is pulled up. Accordingly, as shown in FIGS. 2 and 3, when one outer flap 6 starts to open, the other outer flap 7 also starts to open due to the engagement between the engagement protrusion 13 and the engagement hole 14. After 9 and 10 come out of the slit 11, the engagement protrusion 13 is detached from the engagement hole 14.

  Then, as shown in FIG. 5, after the outer flaps 6 and 7 are completely opened, the inner flap 8 is opened to open the top surface, whereby the article can be taken out from the box.

  Thus, in the said packaging box, since both the outer flaps 6 and 7 can be opened by one operation | movement and the insertion pieces 9 and 10 of the front-end | tip can be pulled out from the slit 11 of the inner flap 8, it opens easily. be able to.

  Here, in order to realize the order in which the engaging protrusions 13 are detached from the engaging holes 14 after the insertion piece 10 is removed from the slit 11, as shown in FIG. In consideration of the length b of the engaging projection 13, it is necessary to set the length c of the insertion piece 10 short when designing the packaging box.

  In the illustrated example, the top surface is shown as an open / close surface by the outer flaps 6, 7 and the inner flap 8, but this open / close surface is located on the side surface of the packaging box and is opened from the side surface. You may make it take in and out goods.

  Moreover, in the said 1st Embodiment, although the inner flap 8 is shorter than the half length of the side wall 1, and the slit 11 has entered from the front-end | tip of the inner flap 8, as shown in 2nd Embodiment shown in FIG. The flaps 8 may be long and overlap each other, and the slits 11 may be provided in the middle part of the inner flap 8 and closed at both ends.

  In the first embodiment, a so-called A-type bottom one-touch type packaging box is illustrated, but the shape of the bottom wall may be a so-called interlock type in which a closed state is maintained only by engaging the bottom plate. Each pair of inner and outer flaps may be overlapped and fixed with a tape or an adhesive to form the most basic A-type bottom structure.

  Further, as in the third embodiment shown in FIG. 7, a so-called self-contained packaging box in which each pair of side walls 1 and 2 is extended from each side of the outer periphery of the bottom wall 16 may be used.

  In addition, in each said embodiment, although the planar shape illustrated the square packaging box, the same sealing structure is applicable also to a packaging box whose planar shape is a hexagon or an octagon.

1, 2 Side wall 3 Passage piece 4, 5 Bottom plate 6, 7 Outer flap 8 Inner flap 9, 10 Insertion piece 11 Slit 12 Finger projection 13 Engagement projection 14 Engagement hole 15 Lock part 16 Bottom wall

Claims (2)

The outer flap (6, 7) is connected to the pair of side walls (1), the inner flap (8) is connected to the other side wall (2), and the insertion piece (9, 7) is inserted from the tip of the outer flap (6, 7). 10) is extended, slits (11) are provided on the inner flap (8), the inner flap (8) is bent, the outer flaps (6, 7) are folded on the inner flap (8) and butted against each other, and the outer flap ( 6, 7) In the packaging box for inserting and sealing the insertion pieces (9, 10) into the slits (11),
Of the outer flaps (6, 7) extending from the pair of side walls (1), a finger hooking projection (12) is provided at the tip of one outer flap (6) by cutting into the insertion piece (9). The front end of the other outer flap (7) is provided with an engaging projection (13) by cutting into the insertion piece (10),
When sealing, as the insertion piece (9) is bent from one outer flap (6), an engagement hole (14) is opened in the extraction trace of the finger projection (12), and the other outer flap ( 7) While engaging the engagement protrusion (13) with the engagement hole (14), insert the insertion pieces (9, 10) into the slit (11),
When opening, put your finger on the finger hooking projection (12) and start to open one outer flap (6), the other outer flap (13) by the engagement between the engagement projection (13) and the engagement hole (14) 7) The easy-open packaging box characterized in that the engagement protrusion (13) is detached from the engagement hole (14) after the insertion piece (10) has come out of the slit (11) after opening. . The easy-open packaging box according to claim 1, wherein the insertion piece (9) at the tip of the one outer flap (6) is provided with a lock portion (15) by notches at both ends of the base,
In the sealed state, the locking portion (15) of the insertion piece (9) is engaged with the edge facing the slit (11) of the inner flap (8), and one outer flap (6) is the finger hooking projection (12). The easy-open packaging box, wherein the other outer flap (7) is fixed in a pressed state, and both the outer flaps (6, 7) are locked in the closed state.

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