JP5600495B2 - Packaging material - Google Patents

Description

  The present invention relates to a tray-shaped packaging member that accommodates an object to be packaged therein.

  2. Description of the Related Art Conventionally, a packaging box having triangular prism-shaped corner pillars standing at four corners of a rectangular bottom plate is known. In this structure, a pair of side plates connected to each of one opposite edge of the bottom plate via a crease line is raised with respect to the bottom plate, and the extended plates extended on both sides of each side plate are formed in a triangular cylindrical shape. (See Patent Document 1).

  Thus, a high buckling strength can be obtained by raising the corner pillars at the four corners of the packaging box.

Japanese Utility Model Publication No. 5-10228

  When the buckling strength is further improved by the triangular prism-shaped corner column as described in Patent Document 1, the corner column is formed by increasing the dimension in the extending direction of the extending plate and winding it so as to overlap a plurality. It is possible to do.

  However, when the dimension of the extending plate in the extending direction is increased in this way, there is a disadvantage that the amount of material used for forming the corner column increases and the cost becomes high.

  In view of the above points, an object of the present invention is to provide a packaging member that can improve the buckling strength without increasing the amount of material used.

The present invention is a tray-shaped packaging unit that accommodates an object to be packaged therein, and has an octagonal bottom plate formed by scraping off corners at four corners of a rectangular shape, and one opposing edge of the bottom plate. A pair of first side plates connected to each other via a fold line, a pair of second side plates connected to each of the other opposing edges of the bottom plate via a fold line, and each of the first side plates A pair of extending plates that are provided on both sides and extend in the same direction as the connecting direction of the second side plate with respect to the bottom plate, and the extending plate is bent into a cylindrical shape along a part of the outer edge of the bottom plate by adhering and fixing the adhesive strips that are connected to the bending direction leading end of the extension up plate on the back surface of the first side plates after the corner pillars in plan view a trapezoidal shape consisting of a pair of obtuse portion and a pair of acute angle portions , the bottom and is erected to form against plate, the second side plate, standing to the bottom plate Allowed, characterized by being formed by bonding fixed to the corner posts.

According to the present invention, since the formed in plan view trapezoidal shape comprising a corner post and a pair of obtuse bent portion and a pair of acute angle bent portion, the bent portion as compared with conventional triangular corner posts often partial buckling strength Will improve. Therefore, a packaging member with high buckling strength can be obtained without increasing the amount of material used.

  Further, in the present invention, the corner column is arranged such that a flat surface formed between a pair of obtuse corners faces an outer surface connected to the first side plate and the second side plate. And According to this, a bending part can be increased, without narrowing the space which accommodates to-be-packaged goods, and the accommodation space equivalent to the conventional triangular prism-shaped corner pillar can be maintained.

The perspective view which shows the packaging member of embodiment of this invention. The expanded view of the packaging member of this embodiment. Explanatory drawing which shows a part of assembly process of the packaging member of this embodiment. (A) is a top view of the packaging member of this embodiment, (b) The top view of the other packaging member mentioned as a comparative example of the packaging member of this embodiment.

  As shown in FIG. 1, the packaging member 1 according to the embodiment of the present invention is formed in a generally tray shape having a pair of first side plates 2 and a pair of second side plates 3 with the upper portions opened, and further at four corners. A cylindrical corner column 4 is provided, and a packaged object (not shown) is accommodated therein.

  As shown in FIG. 2, the packaging member 1 is assembled by corrugated paperboard 5 formed by punching in a generally rectangular shape.

  The corrugated paperboard 5 includes a substantially rectangular bottom plate 6, a pair of first side plates 2 connected to both side edges at opposite positions in one direction (left and right direction in the figure) via a crease line, A pair of second side plates 3 are provided on both side edges at opposite positions in the other direction (vertical direction in the drawing) of the bottom plate 6 via a crease line.

  Each first side plate 2 is provided with an extension plate 7 extending in the same direction (up and down direction in the drawing) as the connection direction of the second side plate 3 with respect to the bottom plate 6.

  Each extending plate 7 includes a first side piece 8 connected to the first side plate 2 via a fold line, a second side piece 9 connected to the first side piece 8 via a fold line, A second side piece 9 is provided with a third side piece 10 provided continuously through a crease line, and an adhesive piece 11 provided with the third side piece 10 is provided continuously through a crease line.

  When assembling the packaging member 1 of the present embodiment from the corrugated paperboard 5, first, the corner pillar 4 is formed by the extended plate 7, as shown in FIG.

  When forming the corner pillar 4, first, the first side piece 8 is placed inside the first side plate 2 along the crease line at the boundary between the first side plate 2 and the first side piece 8 of the extension plate 7. Bend at an obtuse angle. Further, the second side piece 9 is bent at an obtuse angle toward the inside with respect to the first side piece 8 along a crease line at the boundary between the first side piece 8 and the second side piece 9.

  Thereby, the first obtuse angle portion 12 is formed at the boundary between the first side plate 2 and the first side piece 8, and the second obtuse angle portion 13 is formed at the boundary between the first side piece 8 and the second side piece 9. Is formed.

  Subsequently, the third side piece 10 is bent at an acute angle inward with respect to the second side piece 9 along the crease line at the boundary between the second side piece 9 and the third side piece 10. Further, the adhesive piece 11 is bent along the crease line at the boundary between the third side piece 10 and the adhesive piece 11 and bonded to the inner surface of the first side plate 2.

  Thereby, the first acute angle portion 14 is formed at the boundary between the second side piece 9 and the third side piece 10, and the second acute angle portion 15 is formed at the boundary between the third side piece 10 and the first side plate 2. Are formed, and the corner column 4 is formed integrally with the first side plate 2.

  Then, the corner pillar 4 is erected with respect to the bottom plate 6 together with the first side plate 2, and the second side plate 3 is erected with respect to the bottom plate 6 to form an outer surface of the second side piece 9 forming the corner pillar 4. By bonding, the packaging member 1 having the shape shown in FIG. 1 is assembled.

  As shown in FIGS. 1 and 4A, the packaging member 1 of the present embodiment formed in this way is provided with substantially trapezoidal corner pillars 4 at the four corners of the bottom plate 6 and high buckling. Strength is obtained.

  Here, a comparative example for comparison with the packaging member 1 of the present embodiment is shown in plan view in FIG. Unlike the packaging member 1 of this embodiment, the other packaging member 20 mentioned as a comparative example is provided with a triangular prism-shaped corner column 21.

  As apparent from comparison between FIG. 4 (a) and FIG. 4 (b), the accommodation space 1A for the article to be packaged in the packaging member 1 of the present embodiment is to be packaged in another packaging member 20 as a comparative example. It has the same shape (same volume) as the object storage space 20A.

  On the other hand, in the packaging member 1 of the present embodiment, the first side piece 8, which is a flat surface in which the corner column 4 is formed between the pair of obtuse angle parts 12 and 13, The other packaging member 20 is different in that it is arranged toward the continuous outer surface side. As a result of measuring the compressive strength in the vertical direction under the same conditions between the packaging member 1 of the present embodiment and the other packaging member 20, the present inventor has the strength of the packaging member 1 of the present embodiment with respect to the other packaging members 20. It became clear that it improved about 10%.

  Therefore, according to the packaging member 1 of the present embodiment, an accommodation space for an article to be packaged equivalent to that of the other packaging member 20 is secured, and the buckling strength is improved without increasing the amount of corrugated cardboard used as a material. Can be

  DESCRIPTION OF SYMBOLS 1 ... Packaging member, 2 ... 1st side plate, 3 ... 2nd side plate, 4 ... Corner pillar, 6 ... Bottom plate, 7 ... Extension board, 8 ... 1st side piece (flat surface), 11 ... Adhesive piece, 12, 13: obtuse angle part, 14, 15 ... acute angle part.

Claims (2)

A tray-shaped packaging unit that accommodates an item to be packaged inside,
An octagonal bottom plate formed by scraping off the corners at the four corners of the rectangle,
A pair of first side plates connected to each of one opposing edge of the bottom plate via a crease line;
A pair of second side plates connected to each of the other opposing edges of the bottom plate via a fold line;
A pair of extending plates provided on both sides of each first side plate and extending in the same direction as the connecting direction of the second side plate with respect to the bottom plate;
After the extension plate is bent into a cylindrical shape along a part of the outer edge of the bottom plate, an adhesive piece connected to the front end in the bending direction of the extension plate is bonded and fixed to the back surface of the first side plate. A corner pillar having a trapezoidal shape in plan view, which is composed of an obtuse angle portion and a pair of acute angle portions, is formed upright with respect to the bottom plate,
A packaging member, wherein the second side plate is formed upright with respect to the bottom plate and bonded and fixed to the corner column.   2. The corner column is configured such that a flat surface formed between a pair of obtuse angle portions is arranged toward an outer surface connected to the first side plate and the second side plate. Packaging material.

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