JP2016078880A - Packing box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing box, extremely easy in blocking-up work of a bottom surface of a trunk part, and capable of also stably packing a packing object by comparatively flatly forming the bottom surface of the trunk part.SOLUTION: Second bottom flat parts 11 and 11 are folded back in the outside direction of second side plates 6 and 6, and are overlapped with an outer surface of the second side plates 6 and 6, so that mutual inner surfaces of the second bottom flap parts 11 and 11 mutually overlap via an inclined foldable line, and first bottom flap parts 10 and 10 are folded in the inside direction of a trunk part 2, and mutual tip parts of the first bottom flap parts 10 and 10 alternately overlap from its central part, and a bottom surface of the trunk part 2 is blocked up, and a fixing piece of the second bottom flap parts 11 and 11 overlapped with an outer surface of the second side plates 6 and 6, is inserted into an insertion hole 14 formed in the second side plates 6 and 6, to thereby maintain a blocking-up state of the bottom surface of the trunk part 2 by both first bottom flap parts 10 and 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging box for packaging an article therein.

  As this type of packaging box, a pair of first side plates facing each other and a pair of second side plates facing each other in a direction orthogonal to the facing direction of both first side plates form a square cylindrical body, Adjacent side edges of a first flap portion extending upward from the upper edge of the first side plate and a second flap portion extending upward from the upper edge of the second side plate are integrally connected, and the second flap portion is And a pair of inclined fold lines extending in a direction intersecting each other at an angle of 45 ° with respect to the lower edge starting from both corners of the lower edge along the boundary with the second side plate are known. (For example, refer to Patent Document 1).

  In the packaging box having this configuration, the second flap portion is folded over the body portion along a crease line formed at the boundary with the second side plate, so that the second flap portion becomes the first flap. Folded so as to overlap the inner surface side of the first flap portion along the crease line formed at the boundary with the portion and the inclined fold line, and the first flap portion at the boundary with the first side plate It is folded down on the trunk part along the formed crease line, and the upper edges of both first flap parts are brought into contact with each other to close the upper surface of the trunk part.

  In this way, since the body portion can be closed by one behavior such as folding the second flap portion, a quick packaging operation is possible.

Utility Model Registration No. 3139567

  However, according to the above-described conventional configuration, there is an inconvenience that an adhesive tape is attached and sealed along the abutting portions at the tips of the first flap portions in order to maintain the closed state of the body portion. .

  In addition, when the above-described conventional configuration is employed to close the bottom surface of the body portion, the second flap portion that is doubled via the inclined folding line is partially formed on the inner surface side of the first flap portion that closes the bottom surface. Therefore, there is a disadvantage that a relatively large step is generated on the bottom surface and the article cannot be stably packaged.

  In view of the above points, the present invention provides a packaging box that can very easily close the bottom of the body, and can stably package articles by forming the bottom of the body relatively flat. The purpose is to do.

  In order to achieve such an object, the packaging box of the present invention is formed of a pair of first side plates facing each other and a pair of second side plates facing each other in a direction perpendicular to the facing direction of both first side plates. A pair of first bottom flap portions provided with a quadrangular cylindrical body portion, connected to the lower edge of the first side plate via a first lower bendable line, and a second on the lower edge of the second side plate. A pair of second bottom flap portions provided continuously through a lower bendable line, and adjacent side edges of the first bottom flap portion and the second bottom flap portion are integrally connected to each other. The second bottom flap portion has a pair of slopes extending in directions intersecting each other at an angle of 45 ° with respect to the second lower bendable line, starting from both corners at the boundary with the second side plate. The second bottom flap with the position between the bendable line and the inclined bendable line as a base end And the second bottom flap portion is folded back outwardly of the second side plate along the second lower foldable line, and the outer surface of the second side plate. And the second bottom flap portions are bent along the inclined bendable line, and the inner surfaces of the second bottom flap portions are overlapped with each other via the inclined bendable line. The bottom flaps are bent inward of the barrel along the first lower bendable line, and the tips of the first bottom flaps are alternately overlapped from the center to form the bottom of the barrel. Is inserted into the insertion hole formed in the second side plate by inserting the hooking piece of the second bottom flap portion, which is superposed on the outer surface of the second side plate. The closed state of the bottom surface of the part is maintained.

  When closing the bottom surface of the trunk in the packaging box of the present invention, first, both the second bottom flaps are pulled to the outside of the trunk. As a result, the corner portion of the boundary between the second bottom flap portion and the first bottom flap portion is extended, and both the second bottom flap portions are bent to the outside of the trunk portion along the second lower bendable line. The two bottom flaps are bent along the inclined bendable line, and both sides thereof are overlapped via the inclined bendable line. Both first bottom flap portions bend toward the bottom side of the trunk portion following the movement of the second bottom flap portion at this time.

  Subsequently, both the second bottom flap portions are folded back toward the outer side of the second side plate and are superposed on the outer surface of the second side plate. Thereby, the front-end | tip parts of both the 1st bottom flap parts mutually superpose | polymerize from the center part, and the bottom face of a trunk | drum is obstruct | occluded. And a latching piece is inserted in the insertion hole currently formed in the 2nd side plate. Thereby, the state which both the 1st bottom flap parts obstruct | occluded the bottom face of the trunk | drum is maintained.

  In this way, by simply folding both the second bottom flap portions outwardly of the second side plate and inserting the latching piece into the insertion hole, the bottom surface of the trunk portion is easily closed and the closed state is maintained. The operation of closing the bottom surface of the body portion is extremely easy, and the closed state of the bottom surface of the body portion can be maintained without using an adhesive tape or an adhesive for sealing.

  And since both front-end | tip parts have superposed | polymerized both the 1st bottom flap parts which obstruct | occluded the bottom face of the trunk | drum, when a relatively heavy article is accommodated in a trunk | drum and a packaging box is lifted, the 1st outside Even if the flap is bent by the weight of the article, it is possible to prevent a gap from being formed between the first bottom flap portions.

  In addition, since the second bottom flap portion is located outside the trunk portion, and the bottom surface of the trunk portion is closed only by the pair of first bottom flap portions, the level difference caused by the second bottom flap portion inside the trunk portion is conventional. Is not formed. For this reason, the step formed on the bottom surface of the body portion is only the overlapping portion between the tip portions of the first bottom flap portions, and the bottom surface of the body portion is formed relatively flat, so that the article can be packaged stably. can do.

  Furthermore, when the bottom surface of the trunk portion is closed, for example, when the tip portion of one first bottom flap portion is superposed on the tip portion of the other first bottom flap portion, it appears as a step on the bottom surface of the trunk portion. It is formed linearly over the entire length of the overlapping portion with the edge facing one side, but as in the present invention, the tip portions of both first bottom flap portions are alternately overlapped from the center portion. By closing the bottom surface of the body portion, the edges of the first bottom flap portions appearing as steps on the bottom surface of the body portion are directed in opposite directions, and the positions of the steps are not aligned on a straight line. Therefore, when the article is accommodated in the body portion, the effect of the step on the article can be dispersed, and the article can be packaged stably.

  Moreover, the packaging box of this invention WHEREIN: It is preferable that the said 2nd lower bendable line is formed by the cut | interruption covering the full length of the lower edge of a said 2nd side plate. By making the second lower bendable line into a break, when both the second bottom flap portions are overlapped on the outer surface of the second side plate, the two second bottom flap portions are bent along the second lower bendable line. Resistance can be reduced.

  In addition, it is possible to reduce the bulge and distortion generated at the lower end of the body portion by being bent along the second lower foldable line, and the appearance of the packaging box is improved.

  That is, at the lower edge of the trunk when the bottom of the trunk is closed, the corner along the second lower bendable line at the boundary between the second side plate and the second bottom flap, and the first bottom It overlaps with the corner portion at the boundary between the flap portion and the second bottom flap portion. At this time, for example, if a relatively thick paperboard such as corrugated paperboard is used as the packaging box material, it swells at the corner along the second lower foldable line due to the influence of the paperboard thickness of the material. Is generated, and the corner portion at the boundary between the first bottom flap portion and the second bottom flap portion is pushed out from the inside thereof, and a bulge and distortion are formed at the lower edge of the trunk portion.

  On the other hand, by setting the second lower foldable line as a cut, a bent portion along the second lower foldable line is formed at the edge of the cut, and the bulge caused by bending the paperboard hardly occurs. Therefore, when the corner portion at the boundary between the first bottom flap portion and the second bottom flap portion overlaps the outside of the corner portion formed along the second lower bendable line, Almost no swelling or distortion is formed.

  Thus, according to the present invention, relatively thick paperboard such as corrugated paperboard can be suitably used as the packaging box material. In addition, since the edge of the cut formed in the bent portion along the second lower foldable line is covered with the corner portion at the boundary between the first bottom flap portion and the second bottom flap portion and is not exposed, It is also possible to prevent the appearance of the packaging box from being deteriorated due to the exposure of the edge.

  The packaging box of the present invention further includes a pair of top flaps connected to the upper edge of the second side plate via an upper bendable line, and when the upper surface of the trunk portion is closed, In the case where the top flap is bent toward the inner side of the body portion, the insertion hole into which the hook piece of the second bottom flap portion is inserted is the upper bendable line on the upper edge of the second side plate. It is preferable that the hooking piece formed along the insertion hole and inserted into the insertion hole is superposed on the inner surface of the top flap when the top flap is bent inward of the trunk portion.

  According to this, the latching piece does not protrude toward the space where the article is accommodated in the trunk portion, and when the top surface of the trunk portion is closed by the top flap, the latching piece is superposed on the inner surface of the top flap. The latching piece does not get in the way when packaging the article in the packaging box.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the packaging box of embodiment of this invention, Comprising: (a) is a perspective view of the attitude | position which faced the upper surface upwards and faced the bottom, and (b) faced the upper surface facing down and faced up. FIG. The expanded view of the packaging box of FIG. It is a perspective view which shows the obstruction | occlusion work of the bottom face in the packaging box of this embodiment, Comprising: (a) is a perspective view which shows the state just before the obstruction | occlusion work of a bottom face, (b) is a perspective view which shows the state in the middle of the obstruction | occlusion work of a bottom face. . The top view which faces the box inside in the state which opened the upper surface in the packaging box of this embodiment. Cross-sectional explanatory drawing of a part of the packaging box of this embodiment.

  An embodiment of the present invention will be described with reference to the drawings. The packaging box 1 of this embodiment is provided with the trunk | drum 2 formed in the square cylinder shape as shown to FIG. 1 (a) and FIG.1 (b), and the upper surface of the trunk | drum 2 is by the upper cover 3. The lower surface of the trunk portion 2 is closed by the lower lid 4. Articles (not shown) are accommodated in the packaging box 1.

  The packaging box 1 is formed of corrugated paperboard that has been punched into a generally rectangular shape, as shown in a developed state in FIG. The packaging box 1 in the unfolded state includes first side plates 5 and 5 and second side plates 6 and 6 that are alternately connected via bendable lines a, a, and a. The first side plates 5 and 5 are formed in a rectangular shape that is longer than the second side plates 6 and 6.

  First ceiling flaps 7 and 7 are connected to upper edges of the first side plates 5 and 5 via bendable lines b and b, respectively. At the upper edge of each second side plate 6, 6, the second top flaps 8, 8 (the top flaps in the present invention) are connected via bendable lines c, c (corresponding to the upper bendable lines in the present invention). Corresponding) is provided continuously. Further, an adhesive piece 9 is connected to the side edge of one second side plate 6 (second side plate 6 located at the left end in FIG. 2) via a bendable line d.

  First bottom flap portions 10 and 10 are connected to lower edges of the first side plates 5 and 5 via bendable lines e and e (corresponding to a first lower bendable line in the present invention). ing. Second bottom flap portions 11 and 11 are connected to lower edges of the second side plates 6 and 6 via bendable lines f and f (corresponding to a second lower bendable line in the present invention). ing. The bendable lines f and f at the boundaries between the lower edges of the second side plates 6 and 6 and the second bottom flap portions 11 and 11 are formed by cuts.

  Adjacent side edges of the first bottom flap portions 10 and 10 and the second bottom flap portions 11 and 11 are integrally connected via bendable lines g, g, and g, respectively. Further, the adhesive piece 9 extends along the side edge of one second bottom flap portion 11 and is integrally connected to the second bottom flap portion 11.

  Since the 1st bottom flap parts 10 and 10 and the 2nd bottom flap parts 11 and 11 are connected, the bending of the boundary of each 2nd side plates 6 and 6 and the 2nd bottom flap parts 11 and 11 is bent Even if the possible lines f and f are formed by cuts, the second bottom flap portions 11 and 11 are not separated.

  In addition, a large extension portion 10a extending downward and a small extension portion 10b having a smaller extension amount than the large extension portion 10a are formed at the distal end portions of the first bottom flap portions 10, 10. Yes. A V-shaped notch 10c is formed between the large extension portion 10a and the small extension portion 10b. As will be described in detail later, when the body portion 2 is closed by the first bottom flap portions 10, 10, the large extension portion 10 a of one first bottom flap portion 10 is a small extension of the other first bottom flap portion 10. It superposes | stacks on the outer surface of the protrusion part 10b, and the large extension part 10a of the other 1st bottom flap part 10 superimposes on the outer surface of the small extension part 10b of one 1st bottom flap part 10. FIG.

  The first top flaps 7 and 7 and the second top flaps 8 and 8 connected to the upper edge of the first side plates 5 and 5 and the upper edge of the second side plates 6 and 6 are provided with the upper lid 3 shown in FIG. It constitutes. The 1st bottom flap parts 10 and 10 connected with the lower edge of the 1st side plates 5 and 5 constitute bottom cover 4 shown in Drawing 1 (b). On the other hand, the second bottom flap portions 11 and 11 connected to the lower edges of the second side plates 6 and 6 facilitate the closing operation of the body portion 2 by the first bottom flap portions 10 and 10 as will be described in detail later. It is provided to maintain the closed state.

  As shown in FIG. 2, a latching piece 12 projects from the center of the tip (lower end) of the second bottom flaps 11, 11. Further, the second bottom flap portions 11 and 11 are formed with a pair of inclined bendable lines h and h that are inclined and extend in a direction intersecting with each other on the leading end side.

  The latching piece 12 is freely formed between the pair of cuts 13 extending downward from the front end edges of the second bottom flap portions 11, 11.

  The inclined bendable lines h, h formed on the second bottom flap portions 11, 11 are at an angle of 45 ° with respect to the bendable lines f, f (cuts) on the upper edges of the first side plates 5, 5. And one end is located at both corners of the lower edge of the second bottom flaps 11, 11 (both ends of the upper edges of the first side plates 5, 5), and the other end is at the base end of the latching piece 12. It is connected to the lower end of the cut 13 located.

  In addition, a slit-like insertion hole 14 is formed along the bendable lines c and c at the center of the bendable lines c and c on the upper edges of the first side plates 5 and 5. The insertion hole 14 is for inserting a latch piece 12 provided at the tip of the second bottom flap portion 11, 11.

  Next, an assembling operation of the packaging box 1 configured as described above will be described. The packaging box 1 first bends the first side plates 5 and 5 and the first side plates 5 and 5 along the bendable lines a, a and a from the unfolded state shown in FIG. By bonding to the inner surface of the first side plate 5 on the side, the first side plate 5 and the second side plate 6 at both ends are connected to form a square cylindrical body 2. At this time, the first bottom flap portion 10 and the second bottom flap portion 11 at both ends are further connected by the adhesive piece 9. Thus, the first bottom flap portions 10, 10 and the second bottom flap portions 11, 11 at the lower end of the body portion 2 also have a rectangular tube shape that is continuous with the body portion 2.

  Next, as shown in FIG. 3 (a), the top and bottom of the packaging box 1 is inverted, and as shown in FIG. 3 (b), the second bottom flap portions 11 and 11 are bent along the bendable lines f and f. The body part 2 is bent outward. This operation can be performed by gripping a pair of engaging pieces 12 facing each other and simultaneously pulling the engaging pieces 12 in the outward direction of the trunk. At this time, the latching piece 12 can be functioned as a gripping piece to be gripped by an assembly operator of the packaging box 1, and the second bottom flap portions 11 and 11 can be bent smoothly.

  When both the second bottom flap portions 11, 11 are bent along the bendable lines f, f, at the same time, the respective second bottom flap portions 11, 11 are along the bendable lines h, h. Are bent and their inner surfaces overlap each other. Further, following this, both first bottom flap portions 10 and 10 are foldable lines e and e at the lower edges of the first side plates 5 and 5 (in FIG. Along the inner side of the body 2. Subsequently, both the second bottom flap portions 11 and 11 are folded back on the outer surfaces of the first side plates 5 and 5, and then the latching piece 12 is inserted into the insertion hole 14 and latched. Since the latching piece 12 is inserted into the insertion hole 14 and firmly latched, the closed state of the bottom surface of the body portion 2 can be reliably maintained without using a sealing tape or adhesive for sealing. .

  At this time, both the first bottom flap portions 10 and 10 are bent horizontally to close the bottom surface of the body portion 2, but a large extension portion 10 a and a small extension portion are provided at the tip portions of the first bottom flap portions 10 and 10. By forming the protruding portion 10b, the large extending portion 10a of one first bottom flap portion 10, 10 is superposed on the outer surface of the small extending portion 10b of the other first bottom flap portion 10, 10. The large extension portion 10 a of the other first bottom flap portion 10, 10 is superposed on the outer surface of the small extension portion 10 b of the one first bottom flap portion 10, 10.

  Thereby, with reference to FIG.1 (b), the front-end | tip parts of both the 1st bottom flap parts 10 and 10 will superpose | polymerize alternately, and it will be in the state by which the bottom face of the trunk | drum 2 was obstruct | occluded.

  As described above, the bottom surface of the body portion 2 can be closed only by folding the second bottom flap portions 11 and 11 simultaneously until they are overlapped with the outer surfaces of the first side plates 5 and 5. When the second bottom flap portions 11 and 11 are folded back, the bendable lines f and f at the boundary between the second bottom flap portions 11 and 11 and the first side plates 5 and 5 and the second bottom flap portion 11 are returned. , 11 and the first bottom flap portions 10, 10 can be folded at the boundary between the bendable lines g, g, g, but the boundary between the second bottom flap portions 11, 11 and the first side plates 5, 5 Since the bendable lines f, f are notches, not only the bending resistance is relatively small, but also the bulge and distortion generated in the bent portion are extremely small. Therefore, the bottom surface can be closed with a relatively small force, and the appearance of the closed bottom surface is hardly deteriorated.

  And the top-and-bottom direction of the packaging box 1 is returned to the original, and as shown in FIG. 4, an article | item is accommodated in the state in which the upper surface of the trunk | drum 2 was open | released. Since the bottom surface of the body portion 2 is closed only by the first bottom flap portions 10 and 10, there are very few steps. Further, the bottom surface of the body portion 2 is formed by forming the steps of the first bottom flap portions 10, 10 appearing as steps on the bottom surface of the body portion 2 by overlapping the tips of the first bottom flap portions 10, 10 alternately. The edges are opposite to each other, and the step positions are not aligned on a straight line. Therefore, when the article is placed on the bottom surface of the body portion 2, the effect of the step on the article can be dispersed and the article can be stabilized.

  Thereafter, the second top flaps 8 and 8 are bent horizontally along the bendable lines c and c in the inner direction of the body portion 2, and then the first top flaps 7 and 7 are bent along the bendable lines b and b. As shown in FIG. 1A, the upper surface of the body part 2 is closed by bending it horizontally in the inner direction of the body part 2 and superposing it on the upper surfaces of the second ceiling flaps 8 and 8.

  At this time, the latching piece 12 protrudes to the inside of the trunk portion 2 through the insertion hole 14. However, as shown in FIG. 5, the latching piece 12 is in the second top flap inside the trunk portion 2. Since it will be in the state which superposed | polymerized on the inner surface of 8, 8, it will not become obstructive at the time of packaging of articles | goods.

  DESCRIPTION OF SYMBOLS 1 ... Packaging box, 2 ... Body part, 5 ... 1st side plate, 6 ... 2nd side plate, 8 ... 2nd top flap (top flap), 10 ... 1st bottom flap part, 11 ... 2nd bottom flap part, 12 ... latching piece, 14 ... insertion hole, c ... bendable line (upper bendable line), e ... bendable line (first lower bendable line), f ... bendable line (second Lower bendable line), h ... inclined bendable line.

Claims (3)

A square cylindrical body formed by a pair of first side plates facing each other and a pair of second side plates facing each other in a direction orthogonal to the facing direction of both first side plates,
A pair of first bottom flap portions connected to the lower edge of the first side plate via a first lower bendable line, and connected to the lower edge of the second side plate via a second lower bendable line. A pair of second bottom flap portions provided, side edges adjacent to each other of the first bottom flap portion and the second bottom flap portion are integrally connected,
The second bottom flap part is capable of a pair of inclined folds extending in directions intersecting each other at an angle of 45 ° with respect to the second lower foldable line, starting from both corners at the boundary with the second side plate. And a latching piece protruding from the tip edge of the second bottom flap portion with the position between the two bendable lines as the base end,
The second bottom flap portions are folded along the second lower bendable line in the outer direction of the second side plate and overlapped on the outer surface of the second side plate, whereby each second bottom flap portion is inclined. Folded along the bendable line, the inner surfaces of the second bottom flaps are overlapped with each other via the bendable line, and both first bottom flaps are along the first lower bendable line. Folded in the inner direction of the body part, the tip parts of both first bottom flap parts overlap alternately from the center part, the bottom surface of the body part is closed,
By inserting the latching piece of the second bottom flap portion superposed on the outer surface of the second side plate into an insertion hole formed in the second side plate, the bottom surface of the trunk portion by both first bottom flap portions is inserted. A packaging box characterized by maintaining a closed state. In the packaging box of claim 1,
The packaging box, wherein the second lower bendable line is formed by a cut across the entire lower edge of the second side plate. A packaging box according to claim 1 or 2,
A pair of top flaps connected to the upper edge of the second side plate via an upper bendable line is provided, and when the top surface of the trunk portion is closed, both top flaps are located on the inner side of the trunk portion. In what can be folded
The insertion hole for inserting the retaining piece of the second bottom flap portion is formed along the upper bendable line of the upper edge of the second side plate,
The packaging box, wherein the retaining piece inserted into the insertion hole is superposed on the inner surface of the top flap when the top flap is bent inward of the body portion.

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