JP7424154B2 - tray - Google Patents

Description

The present invention relates to a tray.

The cardboard tray includes a bottom plate, front and rear outer walls, an inner wall folded back to the inner side of the outer wall, left and right side walls, and an intermediate wall connected between the outer wall and the side wall. There is one in which the wall is folded and sandwiched between an outer wall and an inner wall (for example, see Patent Document 1).
The intermediate wall of the conventional tray is formed into a square shape, and an intermediate fold line is formed on a diagonal line of the intermediate wall from the intersection of the lower end of the side edge of the outer wall and the lower end of the side edge of the side wall. The intermediate wall is folded in half along the intermediate fold line.

Patent No. 6410248

When assembling the conventional tray described above, the outer wall and side wall are raised against the bottom plate of the blank sheet, the intermediate wall is folded, and then the inner wall is folded back to the inner surface of the outer wall.
With conventional trays, when the intermediate wall is folded, the intermediate wall is separated from the inner surface of the outer wall by a large distance, so the worker presses the intermediate wall against the inner surface of the outer wall and folds the inner wall back toward the inner surface of the outer wall. An intermediate wall is sandwiched between the outer wall and the inner wall. Therefore, the conventional tray has a problem in that assembly work is complicated.

An object of the present invention is to solve the above-mentioned problems and provide a tray that can be easily assembled.

In order to solve the above problems, the present invention provides a tray formed of a sheet made of corrugated cardboard , which includes a bottom plate, front and rear outer walls raised up from the front and rear edges of the bottom plate, and an upper edge of the outer wall. The bottom plate includes an inner wall that is continuous with the outer wall and folded back toward the inner surface of the outer wall, and left and right side walls raised up from the left and right edges of the bottom plate. Further, the tray includes an intermediate wall that is connected to a side edge of the adjacent outer wall and a side edge of the side wall, and is sandwiched between the outer wall and the inner wall in a folded state. There is. The intermediate wall includes a first plate part that is connected to a side edge of the outer wall and overlaps the inner surface of the outer wall, and a first plate part that is connected to the side edge of the side wall and overlaps the inner surface of the first plate part. and a second plate portion. The first plate part and the second plate part are connected to each other via an intermediate fold line. A lower end of the intermediate fold line is connected to an intersection between a lower end of the side edge of the outer wall and a lower end of the side edge of the side wall. The angle between the side edge of the side wall and the intermediate fold line is larger than the angle between the side edge of the outer wall and the intermediate fold line. The outer wall and the first plate part are connected to each other via a first fold line, the first fold line is formed along the corrugated rows of the outer wall, and the first plate part includes: Another fold line is formed parallel to the first fold line .

In the tray of the present invention, the first plate part and the second plate part of the intermediate wall are not formed evenly, and the second plate part is formed larger. In this way, when the outer wall and side wall are raised against the bottom plate of the blank sheet and the intermediate wall is folded between the outer wall and the side wall, the intermediate wall is pushed by the second plate part and the inner wall of the outer wall is folded. Move to the side. In this way, the intermediate wall is brought closer to the inner surface of the outer wall, so that when the worker folds the inner wall back toward the inner surface of the outer wall, the intermediate wall is easily caught between the outer wall and the inner wall.

In the tray of the present invention, when the intermediate wall is folded between the outer wall and the side wall, the first plate part tends to tilt toward the inner surface of the outer wall, so that the intermediate wall can be reliably brought closer to the inner surface of the outer wall.

In the tray described above, when the thickness of the first plate part and the second plate part is formed by crushing to be thinner than the thickness of the outer wall and the side wall, the restoring force when the intermediate wall is folded is small. Therefore, the intermediate wall can be reliably brought close to the inner surface of the outer wall.

In the tray described above, if a cut is formed at the upper end of the intermediate fold line to shorten the intermediate fold line, the restoring force when the intermediate wall is folded becomes smaller, so that it is possible to reliably bring the intermediate wall closer to the inner surface of the outer wall. can.

When assembling the tray of the present invention, when the intermediate wall is folded between the outer wall and the side wall, the intermediate wall is brought to the inner surface of the outer wall, so when the worker folds the inner wall back to the inner surface of the outer wall, the intermediate wall It becomes easy to get caught between the outer wall and the inner wall. In this way, according to the present invention, the tray can be easily assembled.

FIG. 1 is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the front upper left. It is a figure showing a blank sheet of a packaging box concerning an embodiment of the present invention. FIG. 2 is a partial perspective view showing a state in which side walls are raised relative to a bottom plate in a method for assembling a packaging box according to an embodiment of the present invention. FIG. 3 is a partial perspective view showing a state in which the outer wall is raised with respect to the bottom plate and the intermediate wall is folded down in the packaging box assembly method according to the embodiment of the present invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front, rear, left, and right directions are set for convenience in explaining the tray of this embodiment, and do not limit the configuration or usage state of the tray.

As shown in FIG. 1, the tray 1 of this embodiment includes a bottom plate 10, front and rear outer walls 20, 20 raised up from the bottom plate 10, an inner wall 30 folded back to the inner side of the outer wall 20, and a bottom plate 10. It includes raised left and right side walls 40, 40. The tray 1 also includes four intermediate walls 50.

As shown in FIG. 2, the tray 1 is formed by mountain-folding or valley-folding a blank sheet S obtained by cutting out a cardboard sheet along each fold line. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side is visible.
The fold line of the blank sheet S is a ruled line (pressed line) formed by pressing the surface of the blank sheet S into a linear shape. Note that intermittent cuts may be formed in the ruled lines. This makes it easier to fold the blank sheet S along the ruled lines.
Alternatively, the folded line may be formed by forming half-cut cuts that cut only the surface of the sheet or cuts that penetrate the sheet intermittently into a linear shape.

The bottom plate 10 is formed into a rectangle, as shown in FIG. At the edges of the bottom plate 10 in the front-rear direction, a connecting hole 11 passes through the center in the left-right direction. The width of the connecting hole 11 in the front-rear direction is more than twice the thickness of an inner wall 30, which will be described later.

The front outer wall 20 is connected to the front edge of the bottom plate 10 via a fold line. The rear outer wall 20 is connected to the rear edge of the bottom plate 10 via a fold line (see FIG. 2). The front and rear outer walls 20, 20 extend upward from the front and rear edges of the bottom plate 10. The front and rear outer walls 20, 20 are formed in the same square shape (see FIG. 2).

An inner wall 30 is connected to the upper edge of the outer wall 20 via two fold lines, front and rear. The inner wall 30 is formed into a rectangle (see FIG. 2). The inner wall 30 is folded back toward the inner surface of the outer wall 20. The lower edge of the inner wall 30 is in contact with the upper surface of the bottom plate 10.

At the upper edge of the inner wall 30, an upper connecting portion 31 protrudes from the center in the left-right direction. When the tray 1 is stacked with another tray 1, the upper connecting portion 31 is inserted into the connecting hole 11 formed in the bottom plate 10 of the other tray 1 from below.
At the lower edge of the inner wall 30, a lower connecting portion 32 (see FIG. 2) protrudes from the middle portion in the left-right direction. The lower connecting portion 32 is inserted into the connecting hole 11 of the bottom plate 10 from above.

The left side wall 40 is connected to the left edge of the bottom plate 10 via a fold line. The right side wall 40 is connected to the right edge of the bottom plate 10 via a fold line. The left and right side walls 40, 40 extend upward from the left and right edges of the bottom plate 10. The left and right side walls 40, 40 are formed in the same square shape (see FIG. 2).

The intermediate wall 50 is connected to the side edges of the adjacent outer walls 20 and 40, and is sandwiched between the outer wall 20 and the inner wall 30 in a folded state. The intermediate wall 50 is formed into a substantially rectangular shape in the state of the blank sheet S shown in FIG. 2 .

The intermediate wall 50 includes a first plate part 51 connected to the side edge of the outer wall 20 and a second plate part 52 connected to the side edge of the side wall 40. The second plate portion 52 is connected to the second plate portion 52 via an intermediate fold line L10.

The thickness of the first plate part 51 and the second plate part 52 is formed to be thinner than the thickness of the outer wall 20 and the side wall 40 by compressing the sheet from the front and back by crushing.

The first plate portion 51 is connected to the side edge of the outer wall 20 via the first fold line L1. As shown in FIG. 1, the first plate portion 51 is folded back inward with respect to the outer wall 20 at the first fold line L1, and is overlapped with the inner surface of the outer wall 20 (see FIG. 4).

As shown in FIG. 2, the first fold line L1 between the first plate portion 51 and the outer wall 20 is weakened. In this embodiment, by forming another fold line L2 parallel to the first fold line L1, the first plate portion 51 is processed to be easily bent with respect to the outer wall 20 at the first fold line L1.

Furthermore, in the present embodiment, the first fold line L1 is formed along the corrugated steps of the outer wall 20 (in the direction of extension of the flute). This allows the first plate portion 51 to easily bend relative to the outer wall 20.

The second plate portion 52 is connected to the side edge of the side wall 40 via a second fold line L3. As shown in FIG. 4, the second plate part 52 is bent inward with respect to the side wall 40 at the second fold line L3, and is overlapped with the inner surface of the first plate part 51.

The first plate part 51 and the second plate part 52 are connected to each other via an intermediate fold line L10 (see FIG. 2). The lower end of the intermediate fold line L10 is connected to the intersection of the lower end of the side edge of the outer wall 20 and the lower end of the side edge of the side wall 40. The intermediate fold line L10 extends obliquely upward from the intersection of the lower end of the side edge of the outer wall 20 and the lower end of the side edge of the side wall 40.

A notch 53 is formed at the upper end of the intermediate fold line L10. In this embodiment, the notch 53 is formed by cutting a corner of the tip of the intermediate wall 50 (the end opposite to the side wall 40).

In the tray 1 of this embodiment, as shown in FIG. 2, the angle θ1 between the side edge of the side wall 40 and the intermediate polygonal line L10 is greater than the angle θ2 between the side edge of the outer wall 20 and the intermediate polygonal line L10. is largely formed.
Although the difference between the angle θ1 and the angle θ2 is not limited, the difference between the angle θ1 and the angle θ2 is set to be minute. For example, it is preferable to set the difference between the angle θ1 and the angle θ2 between 1 degree and 2 degrees. In this way, by setting the difference between the angle θ1 and the angle θ2 to be minute, it is possible to prevent the side wall 40 from being pushed by the second plate portion 52 and tilting outward significantly.

Next, a method for assembling the tray 1 of this embodiment will be explained.
First, the operator raises the left and right side walls 40, 40 with respect to the bottom plate 10, as shown in FIG. 3, from the state of the blank sheet S shown in FIG.
Subsequently, as shown in FIG. 4, when the worker raises the outer wall 20 with respect to the bottom plate 10, the intermediate wall 50 is folded between the outer wall 20 and the side wall 40 along the intermediate fold line L10.
At this time, when the intermediate wall 50 is viewed from inside the tray 1, the first plate part 51 is folded back to the outer wall 20 in a valley fold at the first fold line L1 (see FIG. 3), and the second plate part 52 is , is bent into a valley fold with respect to the side wall 40 at the second fold line L3. Moreover, the first plate part 51 and the second plate part 52 are bent into a mountain fold at the intermediate fold line L10.

Thereafter, as shown in FIG. 1, the operator folds back the inner wall 30 toward the inner surface of the outer wall 20, and inserts the intermediate wall 50 between the outer wall 20 and the inner wall 30.
Further, the lower connecting portion 32 of the inner wall 30 is inserted into the connecting hole 11 of the bottom plate 10, and the inner wall 30 is fixed to the bottom plate 10, thereby completing the assembly work of the tray 1.

In the tray 1 as described above, as shown in FIG. 2, the angle θ1 between the side edge of the side wall 40 and the intermediate polygonal line L10 is greater than the angle θ2 between the side edge of the outer wall 20 and the intermediate polygonal line L10. is largely formed. That is, in the tray 1, the first plate part 51 and the second plate part 52 of the intermediate wall 50 are not formed equally, and the second plate part 52 is formed larger.
In this way, as shown in FIG. 4, when the outer wall 20 and the side wall 40 are raised with respect to the bottom plate 10 and the intermediate wall 50 is folded between the outer wall 20 and the side wall 40, the second plate part 52, the intermediate wall 50 moves toward the inner surface of the outer wall 20. In this way, the intermediate wall 50 is brought to the inner surface of the outer wall 20.

Furthermore, in the tray 1 of this embodiment, as shown in FIG. 2, the first fold line L1 between the outer wall 20 and the first plate part 51 is weakened, so that when the intermediate wall 50 is folded, In addition, the first plate portion 51 tends to tilt toward the inner surface of the outer wall 20.

Furthermore, in the tray 1 of the present embodiment, the intermediate wall 50 is formed thinner than the outer wall 20 and the side wall 40 by crushing, so that the restoring force when the intermediate wall 50 is folded is small. There is.

In addition, in the tray 1 of this embodiment, as shown in FIG. 4, a notch 53 is formed at the upper end of the intermediate fold line L10, and the intermediate fold line L10 is shortened, so that when the intermediate wall 50 is folded, Resilience is reduced.

As described above, in the tray 1 of this embodiment, when the intermediate wall 50 is folded between the outer wall 20 and the side wall 40, the intermediate wall 50 is reliably brought to the inner surface of the outer wall 20. Thereby, when the worker folds back the inner wall 30 toward the inner surface of the outer wall 20, it becomes easy to sandwich the intermediate wall 50 between the outer wall 20 and the inner wall 30, so that the tray 1 can be easily assembled.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the spirit thereof.
In the intermediate wall 50 of this embodiment, as shown in FIG. 4, the notch 53 is formed at the upper end of the intermediate fold line L10, but the notch 53 does not need to be formed in the intermediate wall 50.

In this embodiment, as shown in FIG. 2, the weakening process is performed by forming another fold line L2 parallel to the first fold line L1 between the first plate portion 51 and the outer wall 20. As a reference example of the present invention, the structure of the weakening process is not limited. For example, the entire first polygonal line L1 may be formed into a half-cut line.

Although the tray 1 of this embodiment is made of cardboard, as a reference example of the present invention, the tray may be made of various known paperboards.

1 Tray 10 Bottom plate 11 Connection hole 20 Outer wall 30 Inner wall 31 Upper connection portion 32 Lower connection portion 40 Side wall 50 Intermediate wall 51 First plate portion 52 Second plate portion L1 First polyline L2 Other polyline L3 Second polyline L10 Intermediate polyline S blank sheet

Claims (3)

A tray formed of a cardboard sheet,
The bottom plate and
front and rear outer walls raised on the front and rear edges of the bottom plate;
an inner wall connected to the upper edge of the outer wall and folded back toward the inner surface of the outer wall;
left and right side walls raised from the left and right edges of the bottom plate;
an intermediate wall connected to a side edge of the adjacent outer wall and a side edge of the side wall, and sandwiched between the outer wall and the inner wall in a folded state;
The intermediate wall is
a first plate part connected to a side edge of the outer wall and overlapped with an inner surface of the outer wall;
a second plate part connected to the side edge of the side wall and overlapped with the inner surface of the first plate part,
The first plate part and the second plate part are connected to each other via an intermediate fold line,
The lower end of the intermediate fold line is connected to the intersection of the lower end of the side edge of the outer wall and the lower end of the side edge of the side wall,
The angle between the side edge of the side wall and the intermediate fold line is larger than the angle between the side edge of the outer wall and the intermediate fold line,
The outer wall and the first plate part are connected to each other via a first fold line,
The first fold line is formed along the corrugated grain of the outer wall,
The tray characterized in that the first plate portion has another fold line formed in parallel to the first fold line. The tray according to claim 1 ,
The tray is characterized in that the thickness of the first plate part and the second plate part is formed by crushing to be thinner than the thickness of the outer wall and the side wall. The tray according to claim 1 or claim 2 ,
A tray characterized in that a notch is formed at the upper end of the intermediate fold line.

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