JP2013169992A - Sealing structure for corrugated fiberboard packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing structure for a corrugated fiberboard packaging box, which can be opened easily though it has been sealed firmly, and which prevents degradation in the strength of the packaging box.SOLUTION: An inner flap 4 is provided with a tongue 6. The tongue 6 is long in the direction of the edge of the leading end of the inner flap 4, is narrower than an adhesive tape 7, and is freely separated from the inner flap 4 while it is kept connected with the upper edge of a body 2. The tongue 6 is freely separated from the inner flap 4 and bent in an opposite direction to the bending direction of the inner flap 4. The leading end is turned downward and placed over the outer surface of the body 2. The adhesive tape 7 is stuck along the butting portions 5 of external flaps 3. While the leading end of the tongue 6 is kept exposed from the end edge of the adhesive tape 7 in its lengthwise direction, the adhesive tape 7 is stuck onto the tongue 6 and to the external surfaces of the body on both sides of the tongue 6.

Description

  The present invention relates to a sealing structure for a cardboard packaging box.

  In a cardboard packaging box, sealing is performed using an adhesive tape. That is, first, a pair of inner flaps that are connected to the upper edge of the rectangular cylindrical body portion of the packaging box via a fold line and are opposed to each other are bent horizontally inward. Next, a pair of outer flaps that are connected to the upper edge of the body portion via a crease line and face each other in a direction intersecting the inner flaps are bent horizontally inward, and the leading edges of the outer flaps are pushed toward each other. Hit it. And the adhesive tape of the predetermined width cut | disconnected by the predetermined | prescribed length is stuck on this abutting part.

  In such a sealing structure, the adhesive tape covers the entire length of the abutting portion and connects both outer flaps, but in order to prevent the outer flap from lifting, both ends in the longitudinal direction of the adhesive tape are It is common to stick on the outer side of the upper side of the trunk.

  By the way, in the sealing structure described above, a strong sealing state can be maintained by using an adhesive tape having a high adhesive force, but on the other hand, when opening, the adhesive tape is difficult to peel off, and the opening operation is smooth. There is an inconvenience that cannot be done.

  Therefore, conventionally, a bent cut line is provided on the outer surface of the body of the packaging box, and the end of the adhesive tape is pasted on the cut line, and the bent part of the cut line is exposed from the end of the adhesive tape. A sealed structure is known (see Patent Document 1 below).

  In this sealed structure, when opening the packaging box, the bent portion of the score line exposed from the end of the adhesive tape is pulled up as a clue, thereby forming a tongue piece that is released from the outer surface of the trunk along the score line. Is done. When the tongue piece is released from the outer surface of the body portion, the end portion of the adhesive tape is peeled off from the outer surface of the body portion together with the tongue piece, and can be easily opened by grasping the end portion of the peeled adhesive tape. be able to.

Japanese Utility Model Publication No. 02-019727

  However, according to the conventional sealing structure, since the score line is provided on the outer side surface of the body portion, for example, when a plurality of packaging boxes are stacked up and down, the strength against the load may be reduced by the score line. In addition, since a part of the cut line is exposed from the adhesive tape, the cut line may be carelessly broken when another article or the like comes in contact from the outside.

  In view of the above points, an object of the present invention is to provide a sealing structure for a corrugated cardboard packaging box that can be easily opened while being in a strong sealed state and that does not reduce the strength of the packaging box. To do.

  In order to achieve such an object, the present invention is to horizontally fold a pair of inner flaps that are connected to the upper edge of a rectangular cylindrical body part through a crease line and face each other inward, A pair of abutting portions, which are connected to the upper edge via a crease line and are bent horizontally inward in a direction that intersects with both inner flaps in the inner direction and the leading edges of both outer flaps abut each other. In the sealing structure of a corrugated packaging box, which is sealed by attaching an adhesive tape of a predetermined width formed and cut to a predetermined length along the abutting portion, the abutting of at least one of the inner flaps In a position corresponding to the portion, the width is smaller than the width of the adhesive tape in the direction toward the leading edge of the inner flap, and the continuous state with the upper edge of the body portion is maintained and released from the inner flap. Tongue The tongue piece is released from the inner flap and folded back in the direction opposite to the folding direction of the inner flap, and the tip is directed downward to be superposed on the outer surface of the body portion, along the abutting portion. Affixing the adhesive tape and affixing the adhesive tape on the outer surface of the trunk and the tongue piece with the tip of the tongue piece exposed from the longitudinal edge of the adhesive tape It is characterized by that.

  According to the present invention, when the tongue piece is polymerized on the outer surface of the trunk after being released from the inner flap, and the adhesive tape is attached to the abutting portion, the tongue piece is formed at the end of the adhesive tape. Since the structure is such that a part of the material is adhered, the sealing operation can be performed very easily.

  Since the said tongue piece is formed in the width dimension smaller than the width | variety of an adhesive tape at this time, when the adhesive tape is stuck on a tongue piece, it will be in the state which the both sides of the adhesive tape protruded from the tongue piece. Therefore, the adhesive tape stuck on the tongue piece can stick the portions projecting on both sides of the tongue piece on both sides of the tongue piece on the outer side surface of the trunk. As a result, even if the tip of the tongue piece is exposed from the edge of the adhesive tape, the adhesive tape is securely adhered to the outer surface of the body on both sides of the tongue piece at portions other than the tip of the tongue piece. A strong sealed state can be maintained.

  When in the sealed state, the tip of the tongue piece is exposed from the edge of the adhesive tape. As a result, the edge of the adhesive tape can be peeled off from the outer surface of the body by simply separating the tongue from the outer surface of the body using the tip of the tongue as a clue at the time of opening. It can be easily opened by picking the edge.

  Further, since the tongue piece is configured to be released from the inner flap, it is not necessary to provide a score line on the outer side surface of the body portion as in the prior art, and the tongue piece can be provided without reducing the strength of the packaging box. it can.

  Further, since the tongue piece is provided on the inner flap, the tongue piece can be easily formed on an existing cardboard packaging box in which the tongue piece is not provided on the inner flap. In other words, this type of packaging box is formed by punching corrugated paperboard into a developed shape and then assembling it. The tongue piece can be easily provided by removing the die.

The perspective view which shows embodiment of this invention. Explanatory drawing which shows the principal part of the sealing state in this embodiment. Explanatory drawing which shows a part of opening operation in this embodiment. The expanded view of the packaging box in this embodiment. Explanatory drawing which expands and shows the principal part of FIG. Explanatory drawing which shows a part of sealing work in this embodiment.

  An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a packaging box adopting the sealing structure of the present invention. The packaging box 1 includes a quadrangular cylindrical body 2, and the top surface is closed by a pair of outer flaps 3. Although not shown in FIG. 1, an inner flap 4 (see FIG. 4), which will be described later, is superposed on the inner surface side of the outer flap 3. The outer flap 3 is connected to the upper edge of the body part 2 and is bent from the upper edge of the body part 2 to close the top surface of the body part 2. And the abutting part 5 which abutted the front-end edge of both the outer flaps 3 mutually is formed in the top | upper surface of the trunk | drum 2. As shown in FIG. Although not shown in FIG. 1, the bottom surface of the body 2 is also closed in the same manner as the top surface.

  Further, the tongue piece 6 is superposed on the outer side surface of the trunk portion 2 (the outer surface of the second side plate 9 described later). And as shown in FIG. 1, the adhesive tape 7 is stuck over the full length of the abutting part 5, and it is in the state by which the packaging box 1 was sealed by this. Note that both ends of the adhesive tape 7 in the longitudinal direction are also attached to the outer surface of the body 2. At this time, as shown in FIG. 2, one end portion of the adhesive tape 7 is stuck to the tongue piece 6 and the outer surface of the body portion 2 on both sides thereof, and the tongue piece 6 starts from the end edge of the adhesive tape 7. The tip of is exposed.

  As shown in FIG. 2, the adhesive tape 7 is adhered to the tongue piece 6 and the outer side surfaces of the body part 2 on both sides thereof, so that the tongue piece 6 is inadvertently separated from the outer surface of the body part 2. There is no, and it can be set as a strong sealed state.

  In addition, the adhesive tape 7 can be mentioned as a thing which can employ | adopt a craft tape, a cloth tape, an OPP tape (stretched polypropylene tape), etc. In this embodiment, because of excellent water resistance and tensile strength, it is possible to maintain a strong sealed state that does not inadvertently break, and since it has transparency and the closed state can be visually confirmed, the OPP tape is used. Adopted. The sealing structure of the present invention is particularly advantageous when an adhesive tape 7 that can be sealed firmly like an OPP tape is used.

  The sealed packaging box 1 is opened by peeling off the adhesive tape 7. At this time, since the adhesive tape 7 maintains a strong sealed state, it is difficult to use as a clue when peeling off any position on the periphery of the adhesive tape 7.

  Therefore, when the adhesive tape 7 is peeled off, as shown in FIG. 3, first, the tongue piece 6 is separated from the outer surface of the body portion 2 with the tip of the tongue piece 6 exposed from the edge of the adhesive tape 7 as a clue. Swing in the direction. Thereby, the edge part of the adhesive tape 7 peels from the outer surface of the trunk | drum 2 of the both sides of the tongue piece 6, and leaves | separates from the outer surface of the trunk | drum 2.

  And the adhesive tape 7 can be peeled over the full length by holding the part peeled from the outer surface of the trunk | drum 2 in the edge part of the adhesive tape 7. FIG. Thus, the packaging box 1 is provided with the tongue piece 6 so that the opening operation can be performed very easily.

  Here, the tongue piece 6 will be described in more detail. The packaging box 1 provided with the tongue piece 6 is formed by punching corrugated paperboard into a generally rectangular shape as shown in a developed state in FIG. In this paperboard, a pair of first side plates 8 and a pair of second side plates 9 are alternately arranged in the lateral direction via the fold line a. In the figure, reference numeral 10 denotes an adhesive piece that is connected to the side edge of one first side plate 8 via a crease line b.

  And each 1st side board 8 and each 2nd side board 9 are bend | folded through the crease line a to make a square cylinder shape, and the trunk | drum 2 (refer FIG. 1) is formed by adhere | attaching an edge part with the adhesive piece 10. FIG. .

  The corrugated paperboard constituting the packaging box 1 is formed by punching out the steps of the stepped core 11 so as to extend in the vertical direction as shown in FIG. Sometimes, strength is obtained with respect to the load from above.

  The outer flap 3 is connected to the upper edge and the lower edge of the first side plate 8 via a crease line c. An inner flap 4 is connected to the upper edge and the lower edge of the second side plate 9 via a crease line d. As shown in FIG. 1, when closing the top and bottom of the body portion 2, first, the inner flap 4 is bent substantially horizontally in the inner direction of the body portion 2, and the outer flap 3 is substantially horizontal in the inner direction of the body portion 2 from above. Bend it. The closed state of the body 2 by the inner flap 4 and the outer flap 3 is the same on the top surface side and the bottom surface side of the packaging box 1.

  As shown in FIG. 4, a tongue piece 6 is formed on the inner flap 4 that is connected to the upper edge of one second side plate 9. As shown in FIG. 5, the tongue piece 6 is freely separated from the inner flap 4 by the cutout portion 12. The lower edge of the tongue piece 6 is connected to the upper edge of the second side plate 9 via the crease line e in the same manner as the inner flap 4. It can be bent independently of the inner flap 4. In addition, in this embodiment, although the tongue piece 6 was formed by the cutout part 12, it replaced with the cutout part 12, and although not shown in figure, the tongue piece 6 can also be formed with a breakable line.

  As shown in FIG. 4, the tongue piece 6 corresponds to the abutting portion 5 when the tips of the pair of outer flaps 3 on both sides of the inner flap 4 provided with the tongue piece 6 are abutted (one point). (Indicated by a chain line v) and extending toward the tip of the inner flap 4.

  Further, as shown in FIG. 5, the width dimension z of the tongue piece 6 is formed smaller than the width dimension t (indicated by a two-dot chain line) of the adhesive tape 7. Specifically, the width dimension t of the adhesive tape 7 is for packing and is generally about 50 mm. In this embodiment, the width dimension z of the tongue piece 6 is about 20 mm. If the width dimension z of the tongue piece 6 is set to about 20 mm, it is advantageous that the adhesive tape 7 having a width dimension t from 50 mm to more than 50 mm can be used. In addition, the width dimension z of the tongue piece 6 is not limited to about 20 mm, and may be appropriately set corresponding to the width dimension t of the adhesive tape 7.

  As shown in FIG. 1, the packaging box 1 configured as described above closes the bottom surface side after forming the body portion 2. In order to close the bottom side of the body portion 2, the outer flaps 3 may be connected with the adhesive tape 7. Otherwise, the outer flaps 3 may be connected with staples or the like, or the inner flap 4 and the outer flap may be connected. 3 may be bonded with an adhesive.

  In the sealing operation on the top surface side of the packaging box 1, as shown in FIG. 6A, first, the inner flap 4 is bent substantially horizontally in the inner direction of the body portion 2. At this time, the tongue piece 6 is released from the inner flap 4 and remains standing on the upper edge of the second side plate 9.

  Next, as shown in FIG. 6 (b), the outer flap 3 is bent substantially horizontally in the inner direction of the body portion 2, and the abutting portion 5 is formed in which the leading edges of both outer flaps 3 abut against each other. Then, the tongue piece 6 is folded outward and superposed on the outer surface of the second side plate 9.

  With this state maintained, as shown in FIG. 1, in a state where the tip of the tongue piece is exposed, the abutting portion 5 and the second side plate 9 on the opposite side to the second side plate 9 where the tongue piece 6 overlaps are provided. Adhesive tape 7 is adhered across the two side plates 9. Thereby, as mentioned above, a strong sealed state can be formed.

  When opening the sealed packaging box 1, as shown in FIG. 3, the end of the adhesive tape 7 is peeled off from the second side plate 9 via the tongue piece 6, and the end of the peeled adhesive tape 7 is gripped. Then, the adhesive tape 7 is peeled from the entire length and removed from the packaging box 1. Thereby, as described above, the packaging box 1 can be opened very easily.

  And the packaging box 1 of the said structure provided the tongue piece 6 so that it might isolate | separate from a part of inner flap 4, and the intensity | strength of the trunk | drum 2 does not fall. Moreover, as shown in FIG. 4, since the corrugated paperboard which comprises the packaging box 1 is made into the direction where the step of the stepped core 11 is extended in an up-down direction, also in the tongue piece 6, it follows along the longitudinal direction. The step of the stepped core 11 extends. For this reason, when the tongue piece 6 is separated from the second side plate 9 at the time of opening, the bending of the tongue piece 6 is prevented, and the adhesive tape 7 is smoothly and reliably peeled from the second side plate 9 via the tongue piece 6. Can do. Moreover, since the stepped direction of the stepped core 11 is such that the tongue piece 6 can be removed from the inner flap 4 with high accuracy.

  Moreover, in this embodiment, although what provided the tongue piece 6 in one of a pair of inner flaps 4 provided in a row by the upper edge of the 2nd side board 9 was shown, it does not restrict to this. For example, although not shown, the tongue piece 6 may be provided on each of the pair of inner flaps 4 connected to the upper edge of the second side plate 9, or connected to the lower edge of the second side plate 9. The tongue pieces 6 may be provided on all the inner flaps 4 including.

  When the tongue pieces 6 are provided on all the inner flaps 4, only one of the tongue pieces 6 is superposed on the second side plate 9 as necessary, and the unnecessary tongue pieces 6 together with the inner flaps 4 are formed on the body 2. Since it can be folded inward and hidden, any of the tongue pieces 6 can be selectively used as needed, which is advantageous.

  Further, since the tongue piece 6 is provided on the inner flap 4, for example, although not illustrated, the tongue piece 6 is not attached to the inner flap 4 in a later step with respect to an existing paperboard punched without the tongue piece 6. The piece 6 can be die cut. Thus, the additional formation of the tongue piece 6 can be performed very easily in the existing packaging box, and the increase in cost due to the provision of the tongue piece 6 can be suppressed extremely small.

  DESCRIPTION OF SYMBOLS 1 ... Packaging box, 2 ... Trunk part, 3 ... Outer flap, 4 ... Inner flap, 5 ... Butting part, 6 ... Tongue piece, 7 ... Adhesive tape, 9 ... 2nd side plate.

Claims (1)

A pair of inner flaps that are connected to the upper edge of the rectangular tubular body via a crease line and that are opposed to each other are bent horizontally inward, and are connected to the upper edge of the body through a crease line. A predetermined width obtained by bending a pair of outer flaps facing each other in a direction intersecting with both inner flaps horizontally inward and forming an abutting portion where the leading edges of both outer flaps abut each other, and cutting to a predetermined length In the sealing structure of the corrugated packaging box sealed by adhering the adhesive tape along the abutting portion,
At least one width of the inner flap that is longer than the width of the adhesive tape in a direction corresponding to the abutting portion of the inner flap and that is smaller than the width of the adhesive tape. To provide a tongue piece that maintains the state and is released from the inner flap,
The tongue piece is released from the inner flap and folded back in the direction opposite to the folding direction of the inner flap, and the tip is directed downward to be superposed on the outer surface of the body part,
The adhesive tape is attached to the tongue piece and the tongue piece in a state where the adhesive tape is stuck along the abutting portion and the tip of the tongue piece is exposed from the end edge in the lengthwise direction of the adhesive tape. A sealing structure for a corrugated cardboard packaging box, characterized in that the cardboard packaging box is adhered to the outer side surfaces of the body part on both sides of the cardboard.

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