JP2012126422A - Blank for tray-type container, and tray-type container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tray-type container hardly causing content liquid leakage therefrom when contents such as wet foods are filled therein and a lid plate is covered thereon and sealed thereto, and to provide a blank for the tray-type container.SOLUTION: The blank for the tray-type container has a shape as follows. Side plates are formed, via mountain fold lines, continuously to one set of mutually facing two sides of a bottom plate demarcated by two sets of mutually facing two sides, respectively; folding connection plates of inverted triangle are formed, via mountain fold lines, continuously to circumferentially both ends of the side plate, and connection edge pieces are formed, via valley hold lines, continuously to both peripheries of the folding connection plates; second side plates are formed, via mountain fold lines, continuously to the another set of mutually facing two sides of the bottom plate, respectively; second folding connection plates of inverted triangle are formed, via valley fold lines, continuously to circumferentially both ends of the second side plate; an edge on a side not connected to the side plate, of the folding connection plate and an edge on a side not connected to the second side plate, of the second folding connection plate, are connected via a mountain folding line to each other; the one set of mutually facing two sides of the bottom plate have shapes of lines convex outward.

Description

  The present invention relates to a tray container blank and a tray container.

  Conventionally, for example, a tray container in which a blank having a shape as shown in FIG. 5 is assembled is used for packaging frozen food or the like.

  In the blank used for this tray container, side plates 12 and 12 are connected to two opposite sides of the square bottom plate 11 via mountain fold lines, respectively. The edge pieces 13 and 13 are continuously provided via the valley fold line, and the tongue pieces 131 and 131 extending in the outer peripheral direction are provided at both ends in the outer peripheral direction of the side plates 12 and 12 of the edge pieces 13 and 13, respectively. At both ends in the outer peripheral direction of the side plates 12, 12, inverted triangular folding joining plates 121, 121 are connected via mountain fold lines, respectively, and valley folding lines are formed on the outer circumferences of the folding joining plates 121, 121. The joint edge piece 122 (which forms the same plane as the edge piece 13) is continuously provided via the.

  Then, the other two opposite sides of the bottom plate 11 are respectively provided with second side plates 14 and 14 via mountain fold lines, and valley fold lines are provided on the outer periphery of the second side plates 14 and 14. The second edge pieces 15 and 15 are connected to each other, and the second edge pieces 151 extending in the outer circumferential direction are respectively provided at both ends in the outer circumferential direction of the second side plates 14 and 14 of the second edge pieces 15 and 15. 151, and the second side plates 14, 14 of the second side plates 14, 14 are connected to the opposite ends of the second side plates 14, 14 through the valley fold lines, respectively, with inverted triangular second folding joint plates 141, 141 connected to each other. It is installed.

  Further, the end edge of the folding joint plate 121 and the end edge of the second folding joint plate 141 are connected to each other via a mountain fold line, and each side plate is folded, and the outer side of the second folding joint plate 141 and the The outer side of the two side plate 14 is bonded, the edge piece 13, the second edge piece 15, and the joining edge piece 122 are each folded, and the inside of the joining edge piece 122 and the outside of the second edge piece 15 are adhered, When the inside of the tongue piece 131 and the outside of the second tongue piece 151 are bonded and assembled in a tray shape, the edge pieces 13, 13, the second edge pieces 15, 15, and the joining edge pieces 122, 122 each form the same plane. It is the blank for tray containers currently manufactured.

  However, in this tray container blank, when this blank is molded into a container, filled with contents such as water, covered with a cover plate and sealed, the corner side plate 12, the folded joint plate 121 and the second At the intersection of the folded joint plate 141 and the second side plate 14, there is a fine hole about the tip of the needle at the portion where the tongue piece 131 of the edge piece and the second tongue piece 151 of the second edge piece overlap, In the case of water, there was a problem that the juice leaked out. Even frozen foods were inadvertently unraveled and leaked when consumers bought them at stores and brought home.

  Therefore, in Patent Document 1, as shown in FIG. 6, as an improvement of the above tray container, the second tongue piece 151 and the second folding joint plate 141 in the vicinity of each corner are in contact with the end edge of the second tongue piece. A tray container blank provided with a small protrusion 152 protruding toward the two-fold joint plate side is disclosed.

  Known documents are shown below.

JP 2000-255546 A

  However, also in the tray container of this patent document 1, the tongue piece 131 of the edge piece and the second side plate are formed at the intersection of the corner side plate 12, the folded joint plate 121, the second folded joint plate 141, and the second side plate 14. The leakage of juice from the overlapping portion of the second tongue 151 of the edge piece has not been completely solved.

  The present invention has been made in view of the above-described circumstances, and when the contents such as water are filled and covered with a cover plate and sealed, even if the contents are water, the tray container is less likely to leak liquid juice. It is an object to provide a blank for the tray container.

In the invention according to claim 1 of the present invention, a side plate is continuously provided on one of the two opposite sides of a bottom plate composed of two opposite sides, via a mountain fold line. Edge pieces are continuously provided on the outer periphery of the face plate via valley fold lines, and tongue pieces extending in the outer peripheral direction are provided at both ends of the side plate on the outer peripheral direction of the side piece, respectively. At both ends, an inverted triangular folded joining plate is connected to each other via a mountain fold line, and a joining edge piece is connected to the outer periphery of the folded joining plate via a valley fold line. A second side plate is connected to two opposite sides of the second side plate via a mountain fold line, and a second edge piece is connected to the outer periphery of the second side plate via a valley fold line. A second tongue piece extending in the outer peripheral direction is provided at each end of the second side plate of the two edge pieces in the outer peripheral direction. Inverted triangular second folded joint plates are connected to both ends in the direction through valley fold lines, respectively, the end of the folded joint plate that is not continuous with the side plate, and the second folded joint The edge of the plate that is not continuously provided with the second side plate is connected continuously via a mountain fold line, and when the side plates are folded and assembled into a tray shape, the edge piece, The second edge piece, the joining edge piece is a tray container blank set so as to form the same plane,
The tray container blank is characterized in that one of the two opposite sides of the bottom plate has a curved shape protruding outward from the bottom plate.

  The present invention has the above-described configuration. Since the two opposite sides of the bottom plate are curved tray blanks convex outwardly, they are connected via mountain fold lines when molded into a container. Since the installed folding joint plate and the second folding joint plate are in close contact with the second side plate, at the intersection of the corner side plate, the folded joint plate, the second folded joint plate, and the second side plate, the edge It is possible to prevent the juice from leaking from the portion where the tongue piece of the piece and the second tongue piece of the second edge piece overlap.

  The invention according to claim 2 of the present invention is such that a mountain fold line between the side plate and the folded joint plate at both ends of the side plate is a curved shape protruding outward of the side plate, 2. The valley fold line between the two side plates and the second folded joint plates at both ends of the second side plates is a curved shape protruding inward of the second side plates. The tray container blank described in 1.

  Furthermore, since the mountain fold line and the valley fold line are as described above in the configuration of claim 1, the fold joint plate and the second fold joint plate connected via the mountain fold line are stronger than the second side plate. The juice comes from the portion where the tongue piece of the edge piece and the second tongue piece of the second edge piece overlap each other at the intersection of the corner side plate, the folded joint plate, the second folded joint plate, and the second side plate. Leakage can be prevented.

The invention according to claim 3 of the present invention is such that the tray container blank according to claim 1 or 2 is mountain-folded between the bottom plate, the side plate, and the second side plate, and the second folded joint plate The outer side of the second side plate and the outer side of the second side plate are bonded, and between the side plate and the edge piece, between the second side plate and the second edge piece, and between the folded joint plate and the joint edge piece. The inner edge of the joint edge piece and the outer side of the second edge piece are bonded to each other, the inner edge of the tongue piece and the outer side of the second tongue piece are bonded, and the edge piece and the second edge are respectively folded. The tray container is characterized in that the pieces and the joining edge pieces are assembled so as to form the same plane.

  Since the tray container according to claim 3 of the present invention is assembled as described above using the tray container blank according to claim 1 or 2 to form a tray container, the corner side plate, the folded joint plate, It is possible to prevent the juice from leaking from the portion where the tongue piece of the edge piece and the second tongue piece of the second edge piece overlap at the intersection of the two folded joint plate and the second side plate.

  The tray container of the present invention prepared with the tray container blank of the present invention has the structure as described above, and when the contents such as water are filled and sealed with a cover plate, the liquid juice of the contents Is difficult to leak.

It is explanatory drawing of 1st Embodiment of the blank for tray containers of this invention. It is a perspective view which shows typically the tray container of this invention shape | molded in 1st Embodiment of the blank for tray containers of this invention. It is explanatory drawing of 2nd Embodiment of the blank for tray containers of this invention. It is a perspective view which shows typically the tray container of this invention shape | molded by 2nd Embodiment of the blank for tray containers of this invention. It is explanatory drawing of an example of the conventional blank for tray containers. It is explanatory drawing of the other example of the conventional tray container blank.

  Hereinafter, modes for carrying out the present invention will be described.

As the material used for the tray container blank of the present invention, paperboard such as coated balls, coated manila, ivory and the like having a basis weight of 200 to 500 g / m ² that are generally used for paper boxes can be used.

  In the case where the contents contain a lot of water such as frozen foods, polyethylene processed paper in which a thermoplastic resin such as polyethylene resin is applied to at least the inner surface of the paperboard by a melt extrusion method or the like can be preferably used.

  In addition, when assembled in a tray container, considering that a thermoplastic resin such as polyethylene resin is advantageous for joining, it is possible to use a processed paper in which a thermoplastic resin such as polyethylene resin is applied to both sides of the blank. desirable.

  As the thermoplastic resin, in addition to polyethylene resins such as low density polyethylene resin, medium density polyethylene resin, high density polyethylene resin, linear low density polyethylene resin, ethylene-α-olefin copolymer, homopolypropylene resin, A polypropylene resin such as a propylene-ethylene random copolymer, a propylene-ethylene block copolymer, and a propylene-α-olefin copolymer can be selected. These olefin resins can be selected by graft polymerization or the like. Modified modified polyolefin resins can also be used.

<First Embodiment>
Drawing 1 is an explanatory view of a 1st embodiment of a blank for tray containers of the present invention. FIG. 2 is a perspective view schematically showing the tray container of the present invention formed in the first embodiment of the tray container blank of the present invention.

  In the tray container blank 10 of the first embodiment, side plates 12 and 12 are connected to two opposite sides of a bottom plate 11 composed of two opposite sides, respectively, via mountain fold lines. ing. The two opposite sides a and a of the bottom plate 11 are curved outwardly from the bottom plate 11, and accordingly, the peaks between the bottom plate 11 and the side plates 12 and 12. The fold line is also provided in the outward convex curve.

  Edge pieces 13 and 13 are connected to the outer periphery of the side plates 12 and 12 via valley fold lines. And the tongue pieces 131 and 131 extended in the outer peripheral direction are provided in the outer peripheral direction both ends of the side plates 12 and 12 of the edge pieces 13 and 13, respectively.

  At both ends in the outer peripheral direction of the side plates 12, 12, inverted triangular folding joining plates 121, 121 are respectively connected via mountain fold lines, and valley folding lines are formed on the outer circumferences of the folding joining plates 121, 121. The joint edge pieces 122 and 122 are continuously provided through the vias. A blank without the joining edge piece 122 may be used (the drawing is omitted).

  On the other two opposite sides of the bottom plate 11, second side plates 14, 14 are connected via mountain fold lines, respectively, and the outer periphery of the second side plates 14, 14 is connected via valley fold lines. Second edge pieces 15 are provided continuously. Second tongue pieces 151 and 151 extending in the outer peripheral direction are provided at both ends in the outer peripheral direction of the second side plates 14 and 14 of the second edge pieces 15 and 15, respectively.

  At the both ends in the outer peripheral direction of the second side plates 14, 14, second inverted joining plates 141, 141 are connected via valley fold lines, respectively, and are connected to the side plates 12 in the folding joining plate 121. The edge that is not connected and the edge that is not connected to the second side plate 14 in the second folding joint plate 141 are connected via a mountain fold line.

  A projecting portion 142 projecting upward is provided in the vicinity of the end of the second folding joint plate 141 on the second edge piece 15 side. The projecting portion 142 is provided in order to support the second edge pieces 15 and 15 from the bottom and perform a good seal when the lid plate is pressurized and heated to seal the formed tray container.

  Molding from the tray container blank 10 to the tray container 101 is performed as follows. That is, the side plates 12, 12, 14, and 14 are assembled in a tray shape by folding a mountain fold between the side plates 12, and first, the inner surfaces of the folded joint plate 121 and the second folded joint plate 141 are bonded together.

  Next, the bonded two bonding plates 121 and 141 are bent toward the second side plate 14 to bring the second side plate 14 and the second folded bonding plate 141 into close contact with each other, and the edge piece 13, the second edge piece 15, Each of the joining edge pieces 122 is valley-folded, the inside of the joining edge piece 122 and the outside of the second edge piece 15 are adhered, the inside of the tongue piece 131 and the outside of the second tongue piece 151 are adhered, and the tray container 101 is attached. Mold.

Second Embodiment
Drawing 3 is an explanatory view of a 2nd embodiment of a blank for tray containers of the present invention. FIG. 4 is a perspective view schematically showing the tray container of the present invention formed in the second embodiment of the tray container blank of the present invention.

In the tray container blank 20 of the second embodiment, side plates 12 and 12 are continuously provided on one of the two opposite sides of the bottom plate 11 composed of two opposite sides, via mountain fold lines, respectively. Has been. And, the two opposite sides a and a of the bottom plate are respectively curved in a convex shape on the outside, so that the mountain fold line between the bottom plate 11 and the side plates 12 and 12 is also outward. It is provided in a convex curve shape.

  Edge pieces 13 and 13 are connected to the outer periphery of the side plates 12 and 12 via valley fold lines. And the tongue pieces 131 and 131 extended in the outer peripheral direction are provided in the both ends of the outer peripheral direction of the side plate 12 of the edge pieces 13 and 13, respectively.

  At both ends in the outer peripheral direction of the side plates 12, 12, inverted triangular folding joining plates 121, 121 are respectively connected via mountain fold lines, and valley folding lines are formed on the outer circumferences of the folding joining plates 121, 121. The joint edge pieces 122 and 122 are continuously provided through the vias. A blank without the joining edge piece 122 may be used.

  On the other two opposite sides of the bottom plate 11, second side plates 14, 14 are connected via mountain fold lines, respectively, and the outer periphery of the second side plates 14, 14 is connected via valley fold lines. Second edge pieces 15 are provided continuously. Second tongue pieces 151 and 151 extending in the outer peripheral direction are provided at both ends in the outer peripheral direction of the second side plates 14 and 14 of the second edge pieces 15 and 15, respectively.

  At the both ends in the outer peripheral direction of the second side plates 14, 14, second inverted joining plates 141, 141 are connected via valley fold lines, respectively, and are connected to the side plates 12 of the folding joining plate 121. The edge which is not connected to the second side plate 14 of the second folding joint plate 141 is connected to the end edge which is not connected to the second side plate 14 via a mountain fold line.

  A projecting portion 142 projecting upward is provided in the vicinity of the second side plate 14 at the upper end of the second folding joint plate 141. The projecting portion 142 is provided in order to support the second edge pieces 15 and 15 from the bottom and perform a good seal when the lid plate is pressurized and heated to seal the formed tray container.

  Further, unlike the first embodiment, the mountain fold line b between the side plates 12 and 12 and the folded joint plates 121 and 121 at both ends in the outer circumferential direction is a curved line protruding outward of the side plates 12 and 12. The valley fold line c between the second side plates 14, 14 and the second folding joint plates 141, 141 at both ends in the outer circumferential direction is inward of the second side plates 14, 14. It has a convex curve.

  Molding from the tray container blank 20 to the tray container 201 is performed as follows. That is, the side folds 12, 12, 14, 14 are assembled in a tray shape by folding a mountain fold between the side plates 12, and first, the inner surfaces of the fold joint plate 121 and the second fold joint plate 141 are bonded together.

  Next, the bonded two bonding plates 121 and 141 are bent toward the second side plate 14 to bring the second side plate 14 and the second folded bonding plate 141 into close contact with each other, and the edge piece 13, the second edge piece 15, Each of the joining edge pieces 122 is valley-folded, the inside of the joining edge piece 122 and the outside of the second edge piece 15 are adhered, the inside of the tongue piece 131 and the outside of the second tongue piece 151 are adhered, and the tray container 201 is attached. Mold.

10, 20 ... tray container blanks 101, 201 ... tray container 11 ... bottom plate 12 ... side plate 13 ... edge piece 14 ... second side plate 15 ... second Edge piece 121 ... Folding joining plate 122 ... Joining edge piece 131 ... Tongue piece 141 ... Second folding joining plate 142 ... Projection 151 ... Second tongue piece 152 ... Small Protrusion a ... Side b ... Mountain fold line c ... Valley fold line

Claims (3)

A side plate is connected to each of the two opposite sides of the bottom plate composed of two pairs of opposite sides via a mountain fold line, and the outer periphery of the side plate is connected via a valley fold line. Edge pieces are continuously provided, and tongue pieces extending in the outer peripheral direction are provided at both ends of the side plate in the outer peripheral direction, respectively, and are opposite to each other in the outer peripheral direction of the side plate via mountain fold lines. Triangular folded joint plates are continuously provided, and joining edge pieces are continuously provided on the outer periphery of the folded joint plates via valley fold lines, and mountain folds are respectively formed on the two opposite sides of the bottom plate. A second side plate is continuously provided via a line, a second edge piece is provided continuously on the outer periphery of the second side plate via a valley fold line, and the outer periphery of the second side plate of the second edge piece Second tongue pieces extending in the outer circumferential direction are provided at both ends in the direction, and valley folds are provided at both ends in the outer circumferential direction of the second side plate. An inverted triangular second folding joint plate is provided through the end, the end of the folding joint plate not connected to the side plate, and the second side joining plate of the second folding joint plate. The side edge that is not provided is connected via a mountain fold line, and when the side plates are folded and assembled into a tray shape, the edge piece, the second edge piece, and the joining edge piece Are tray container blanks that are set to form the same plane,
A tray container blank, wherein the two opposite sides of the bottom plate are curved outwardly from the bottom plate, respectively.   A mountain fold line between the side plate and the folded joint plate at both ends of the side plate is a curved shape protruding outward of the side plate, and the second side plate and the second side plate The blank for a tray container according to claim 1, wherein a valley fold line between the second folded joint plates at both ends is a curved shape protruding inward of the second side plate.   The tray container blank according to claim 1 or 2, wherein the bottom plate, the side plate, and the second side plate are fold-folded, and the outside of the second folded joint plate and the outside of the second side plate are formed. Adhering and valley-folding between the side plate and the edge piece, between the second side plate and the second edge piece, and between the folded joint plate and the joint edge piece, Adhering the inner side and the outer side of the second edge piece, and adhering the inner side of the tongue piece and the outer side of the second tongue piece, the edge piece, the second edge piece, and the joining edge piece are in the same plane. A tray container assembled to form.

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