JP2024013004A - paper tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper tray that can be assembled and expanded without requiring time and effort and can suppress concern in terms of sanitation.

SOLUTION: The paper tray comprises: a rectangular bottom wall; a first side wall linking to a side extending in a first direction in the bottom wall; a second side wall linking to a side extending in a second direction which is orthogonal to the first direction in the bottom wall; a connection piece connecting the first side wall and the second side wall which are made adjacent to each other; a first folding line, formed in the connection piece, at which the connection piece is bisected in a circumferential direction; a second folding line positioned at an intersection part between the connection piece and the first side wall; a third folding line positioned at an intersection part between the connection piece and the second side wall; a locking piece linking to an upper edge of an opening of the first side wall; and a notched part for locking positioned at a part intersecting with the first side wall, in the locking piece. The connection piece is attachably and detachably tucked into the notched part for locking and fixed, when folded at the first folding line to be folded back so that inner surface sides thereof oppose to each other and folded in parallel to the first side wall at the second folding line and the third folding line overlapping with each other.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to paper trays.

For example, paper trays are used as food packaging materials.
Patent Document 1 discloses a tray in which blanks having side plates and corner flaps formed by extending the side plates are assembled on the four sides of a bottom plate and bonded to the side plates.

Japanese Patent Application Publication No. 10-53235

The tray disclosed in Patent Document 1 has a problem in that it is time-consuming because assembly involves gluing work. Further, when eating the solid contents directly from the tray, it is preferable to unfold the tray into a plate shape, since it is difficult to eat the solid contents if the contents are in the shape of a tray. When unfolding the tray disclosed in Patent Document 1 into a dish shape, it is necessary to peel off the adhesive portion or provide perforations or the like in the ruled line portion and then separate and unfold the tray. Therefore, it takes a lot of time to deploy it, and there is also the possibility of getting your hands dirty.

Further, if the tray is made of paper, there is a possibility that paper powder will be scattered when a part of the tray such as a perforation is cut off, which is not sanitary.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a paper tray that does not take much time to assemble and unfold and can suppress hygienic concerns.

The present invention has the following aspects.
[1] A rectangular bottom wall, a first side wall connected to a side of the bottom wall extending in a first direction, and a second side wall connected to a side of the bottom wall extending in a second direction perpendicular to the first direction. a connecting piece that connects the first side wall and the second side wall that are adjacent to each other; and a first connecting piece that is provided on the connecting piece and that bisects the connecting piece in the circumferential direction from a corner of the bottom wall. a fold line, a second fold line located at the intersection of the connecting piece and the first side wall, and a second fold line located at the intersection of the connecting piece and the second side wall, and the connecting piece is located at the intersection of the connecting piece and the first side wall. located at the intersection of a third fold line that overlaps with the second fold line when folded at , a locking piece that connects to the upper edge of the opening of the first side wall, and the first side wall in the locking piece. , and a locking notch formed with openings on both outsides in the first direction, and the connecting piece is bent along the first fold line and folded with the inner sides facing each other. , the first side wall is bent at the second fold line and the third fold line to protrude outward in the first direction and the second direction, and is bent at the second fold line and the third fold line, which overlap with each other. A paper tray that is removably sandwiched and fixed in the locking notch when the paper tray is bent parallel to the locking notch.
[2] Projections projecting outward in the first direction from the upper end sides of both ends of the first side wall in the first direction, and an opening in the second side wall extending upward from the upper end of the third fold line. a second notch opening at an upper edge, and the protrusion is inserted into the second notch and engages with the second side wall from outside in the second direction. paper tray.
[3] The paper tray according to [1] or [2], wherein the protrusion has a semicircular shape when viewed in the second direction.

According to the present invention, it is possible to provide a paper tray that does not take much time to assemble and unfold, and can reduce hygienic concerns.

It is a perspective view showing an example of a paper tray concerning this embodiment. FIG. 2 is a developed view of a blank 2 of a paper tray 1 according to the present embodiment. FIG. 3 is a view of the +X side end of the paper tray 1 according to the present embodiment, viewed from above. FIG. 2 is an exploded perspective view of the +X side end of the paper tray 1 according to the present embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the paper tray of the present invention will be described with reference to FIGS. 1 to 4.
Note that the following embodiments illustrate one aspect of the present invention, and do not limit the present invention, and can be arbitrarily modified within the scope of the technical idea of the present invention. In addition, in the following drawings, in order to make each structure easier to understand, the scale, number, etc. of each structure are different from the actual structure.

FIG. 1 is a perspective view of the paper tray 1 in an assembled state. FIG. 2 is a developed view of the blank 2 before being assembled into the paper tray 1. That is, the paper tray 1 is formed by assembling the blanks 2.
In the blank 2 shown in FIG. 2, the valley-fold ruled lines used when assembling the rectangular parallelepiped paper tray 1 are represented by one-dot chain lines, and the mountain-fold ruled lines are represented by two-dot chain lines.

There are no particular restrictions on the material of the blank 2, but for example, paperboard with a thermoplastic resin layer formed on the surface of the paper layer that will be inside the tray can be used. The resin layer formed on the blank 2 is formed by laminating films made of polyethylene resin, polypropylene resin, polyethylene terephthalate resin, polybutylene terephthalate resin, or polymethylpentene resin via a molten resin layer. .
There are no particular restrictions on the material of the paper layer, but various types of paperboard, coated cardboard, carton base paper, cup base paper, etc. commonly used for paper containers can be used.

As shown in FIGS. 1 and 2, the paper tray 1 includes a bottom wall 4, a first side wall 5, a second side wall 6, a connecting piece 7, a first fold line 8, and a locking piece 9. , has a locking notch 10.
The bottom wall 4 has a rectangular shape. The first side wall 5 is connected to two opposing sides 4A of the bottom wall 4, respectively. The first side wall 5 is bent at the side 4A and extends upward. The side 4A is a side extending in the first direction. The second side wall 6 is connected to two opposite sides 4B of the bottom wall 4, which are different from the side 4A. The second side wall 6 is bent at the side 4B and extends upward. Side 4B is a side extending in the first direction.

In the following description, the vertical direction which is the normal direction of the bottom wall 4 is referred to as the Z direction, the +Z side is referred to as the upper side, and the -Z side is referred to as the lower side. The direction perpendicular to the Z direction and parallel to the first direction is defined as the Y direction. The direction perpendicular to the Z direction and parallel to the second direction is defined as the X direction. The Y direction and the X direction are orthogonal. Moreover, in the X direction and the Y direction, the side away from the center of the bottom wall 4 in each direction is called the outside, and the side approaching the center of the bottom wall 4 is called the inside.

In addition, since the paper tray 1 has a line-symmetrical shape in each of the X direction and the Y direction, regarding the constituent elements of the paper tray 1, one will be explained in each of the X and Y directions, and the other will be explained. May be omitted. Furthermore, the components of the paper tray 1 are the configurations of the paper tray 1 after assembly, unless it is specifically mentioned that they are the configurations of the blank 2.

Protrusions 11 that project outward in the Y direction are provided on the upper end sides of both ends of the first side wall 5 in the Y direction. In the blank 2, the protrusion 11 protrudes into a notch 12 formed in the connecting piece 7. In the assembled paper tray 1, the protrusion 11 has a semicircular shape when viewed in the X direction, and protrudes outward from the second side wall 6 in the Y direction.

The connecting piece 7 connects the adjacent first side wall 5 and second side wall 6. In the blank 2, the connecting piece 7 includes a first portion 7A that protrudes outward in the Y direction from the first side wall 5, and a second portion 7B that protrudes outward in the X direction from the second side wall 6. The first fold line 8 is provided on the connecting piece 7. The first fold line 8 circumferentially bisects the connecting piece 7 into a first portion 7A and a second portion 7B starting from a corner of the bottom wall 4. The connecting piece 7 is folded in a valley fold along the first folding line 8, and the first portion 7A and the second portion 7B are folded with their inner surfaces facing each other.

The first portion 7A is mountain-folded along the second fold line 13 located at the intersection with the first side wall 5. The second fold line 13 extends upward from the corner of the bottom wall 4 to the protrusion 11 . The second portion 7B is mountain-folded along the third fold line 14 located at the intersection with the second side wall 6. The third fold line 14 extends upward from the corner side of the bottom wall 4 to the second notch 15 . The second notch 15 extends upward from the upper end of the third fold line 14 and opens at the upper edge of the opening of the second side wall 6 .

In the connecting piece 7 which is bisected in the circumferential direction along the first fold line 8 and valley-folded, the second fold line 13 and the third fold line 14 overlap. The connecting piece 7 which is valley-folded along the first folding line 8 and mountain-folded along the second folding line 13 and the third folding line 14 is located on the outside of the first side wall 5 in the Y direction and on the second side wall 6. Projects outward in the X direction. The upper edge of the second portion 7B of the connecting piece 7 is located above the upper edge of the opening of the first side wall 5. That is, the second portion 7B protrudes above the upper edge of the opening of the first side wall 5 when the connecting piece 7 is bent parallel to the first side wall 5.

The locking piece 9 is connected to the upper edge of the opening of the first side wall 5. The center position of the locking piece 9 in the Y direction is the same as the center position of the first side wall 5 in the Y direction. The length of the locking piece 9 in the Y direction is shorter than the first side wall 5. The locking notch 10 is located at the intersection of the locking piece 9 with the first side wall 5 . The locking notches 10 are formed to open on both outer sides of the locking piece 9 in the Y direction.

The locking piece 9 is mountain-folded with the intersection with the first side wall 5 serving as a fourth fold line 16 . The locking piece 9 is mountain-folded at a fifth fold line 17 formed at a position of the edge forming the width of the locking notch 10 that is away from the first side wall 5 in the X direction. . That is, the locking notch 10 is formed between the fourth fold line 16 and the fifth fold line 17. The locking piece 9 mountain-folded along the fourth fold line 16 and the fifth fold line 17 is bent downward.

FIG. 3 is a view of the +X side end of the paper tray 1 viewed from above. In FIG. 3, the width of the locking notch 10 is illustrated to be large for ease of understanding.
As shown in FIG. 3, it is valley-folded along the first folding line 8 and mountain-folded along the second folding line 13 and the third folding line 14, so that the outer side of the first side wall 5 in the Y direction and the second side wall 6 The connecting piece 7 protruding outward in the X direction in is removably attached to the locking notch 10 when it is bent parallel to the first side wall 5 at the overlapping second folding line 13 and third folding line 14. It is sandwiched and fixed in a locked state in the X direction.

Further, the protrusion 11 on the first side wall 5 is inserted into the second notch 15 and engaged with the second side wall 6 from the outside in the X direction. When the connecting piece 7 is sandwiched between the locking notches 10 and fixed, a part of the first side wall 5 connected to the locking piece 9 is pushed out by the connecting piece 7 and moves inward.
In this embodiment, by inserting the protrusion 11 into the second notch 15 and engaging the second side wall 6 from the outside in the X direction, it is possible to suppress part of the first side wall 5 from moving inward.

When inserting the protrusion 11 into the second notch 15, the protrusion 11 is pinched, but since the protrusion 11 is semicircular and has no edges, when the protrusion 11 is pinched, the edge It is possible to suppress the occurrence of pain. Further, the protrusion 11 inserted into the second notch 15 protrudes outward from the first side wall 5 in the Y direction, but since the protrusion 11 has a semicircular shape, it is difficult to touch the protrusion 11 from the outside. You can suppress the feeling of pain even in some cases.

The connecting piece 7 is inserted into the locking notch 10 from the outside in the Y direction through the opening of the locking notch 10 with the locking piece 9 bent downward to the first fold line. 8 side, or before bending the locking piece 9 downward, bend the connecting piece 7 parallel to the first side wall 5, and then bend the locking piece 9 downward and insert the locking notch. The procedure may include inserting the upper side of the second portion 7B into the section 10.

When the connecting piece 7 serving as a web corner portion is sandwiched between the locking notches 10 and locked in the X direction, the first side wall 5 and the second side wall 6 rise from the bottom wall 4 into a rectangular frame shape. The tray 1 can be assembled without using adhesive.
In the assembled paper tray 1, for example, by lifting the locking piece 9 located on the +X side upward, the locking notch 10 is unlocked from the connecting piece 7 on the +X side.

FIG. 4 is an exploded perspective view of the +X side end of the paper tray 1.
After the locking notch 10 is disengaged from the connecting piece 7, by pulling the locking piece 9 toward the +X side, the first side wall 5 and the connecting piece 7 are expanded toward the +X side.

Specifically, by pulling the locking piece 9 toward the +X side, as shown in FIG. The first part 7A is opened to the first side wall 5, the second part 7B, which was bent at the first fold line 8, is opened to the first part 7A, and the second part 7B, which was folded at the third fold line 14, is opened to the first side wall 5, and Portion 7B opens to second side wall 6. As a result, the first side wall 5 and the connecting piece 7 on the +X side are expanded into a dish shape.

As explained above, the paper tray 1 of this embodiment has a locking notch when the connecting piece 7 connecting the first side wall 5 and the second side wall 6 is bent parallel to the first side wall 5. Since it is removably sandwiched and fixed to the portion 10, it can be assembled without using adhesive or the like. Therefore, the paper tray 1 of this embodiment requires no effort to assemble.

Furthermore, in the paper tray 1 of this embodiment, the first side wall 5 and the connecting piece 7 can be expanded into a dish shape by pulling the locking piece 9 after separating the connecting piece 7 from the locking notch 10. . Therefore, the paper tray 1 of this embodiment can be unfolded into a plate shape suitable for eating without much effort. Furthermore, since the paper tray 1 of the present embodiment does not require peeling off the adhesive portion or cutting off the perforations, there is no need to stain hands or scatter paper dust, and hygiene concerns can be suppressed.

Furthermore, in the paper tray 1 of this embodiment, the protrusions 11 protruding outward in the Y direction from both ends of the first side wall 5 are inserted into the second notches 15, and the protrusions 11 are inserted into the second side wall 6 from the outside in the X direction. Because of the engagement, it is possible to suppress a portion of the first side wall 5 from moving inward.

In addition, in the paper tray 1 of this embodiment, the protrusion 11 has a semicircular shape when viewed in the Y direction, so when the protrusion 11 is pinched or touched, the edges may cause pain. can be suppressed.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. The various shapes and combinations of the constituent members shown in the above example are merely examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

In the above embodiment, a configuration in which the second side wall 6 has a flat plate shape is illustrated, but the configuration is not limited to this. For example, as shown by the two-dot chain line in FIG. 1, a configuration may be adopted in which an extraction notch 6A is provided at the upper edge of the opening in the second side wall 6.
By adopting this configuration, it becomes easy to take out the contents stored in the paper tray 1 from the second side wall 6 side.

DESCRIPTION OF SYMBOLS 1... Paper tray, 4... Bottom wall, 5... First side wall, 6... Second side wall, 7... Connecting piece, 8... First fold line, 9... Locking piece, 10... Locking notch, 11 ...Protrusion, 13...Second fold line, 14...Third fold line, 15...Second notch

Claims (3)

a rectangular bottom wall,
first side walls respectively connected to sides extending in the first direction of the bottom wall;
a second side wall connected to a side of the bottom wall extending in a second direction perpendicular to the first direction;
a connecting piece that connects the first side wall and the second side wall that are adjacent to each other;
a first fold line provided on the connecting piece and bisecting the connecting piece in the circumferential direction starting from a corner of the bottom wall;
a second fold line located at the intersection of the connecting piece and the first side wall;
a third folding line located at the intersection of the connecting piece and the second side wall and overlapping the second folding line when the connecting piece is bent along the first folding line;
a locking piece connected to the upper edge of the opening of the first side wall;
a locking notch located at the intersection of the locking piece with the first side wall and opened to the outside in both the first directions;
has
The connecting piece is folded along the first folding line so that the inner surfaces thereof face each other, and is folded along the second folding line and the third folding line so as to be folded outward in the first direction and the second direction. A sheet of paper that protrudes and is removably sandwiched and fixed in the locking notch when bent parallel to the first side wall along the second fold line and the third fold line that overlap with each other. tray. protrusions that respectively protrude outward in the first direction from upper end sides at both ends of the first side wall in the first direction;
a second notch extending upward from the upper end of the third fold line and opening at the upper edge of the opening of the second side wall;
has
The protrusion is inserted into the second notch and engages the second side wall from outside in the second direction.
The paper tray according to claim 1. The protrusion has a semicircular shape when viewed in the second direction.
The paper tray according to claim 2.

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