JP2003312640A - Corrugated fiberboard tray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugated fiberboard tray to improve the strength of the entire tray by improving the strength of partitions. <P>SOLUTION: A bottom wall 2 is provided at a center part of one corrugated fiberboard, and outer plates 3a and 3b forming outer sides of a side wall and inner plates 5a and 5b forming inner sides of the side wall are successively and continuous provided on both sides of the bottom wall 2 and in the longitudinal direction of the corrugated fiberboard. Outward extension pieces 10a-10d and inward extension pieces 12a-12d are continuous provided on both ends of the outer plates 3a and 3b and the inner plates 5a and 5b. Outer end plates 7a and 7b and sashes 8a and 8b to cover the outer end plates 7a and 7b and a part of upper ends of the side walls are successively and continuous provided on both ends of the bottom wall 2. Cutting lines from the upper end to the lower ends of the inner plates are formed to form separable partition pieces 20a and 20b. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard tray having an upper end opening having a bottom wall and four side walls.
The present invention relates to a cardboard tray used to store strawberry packs and the like. 2. Description of the Related Art In a conventional cardboard tray, a tray having a bottom wall and four side walls is assembled from one piece of cardboard. Further, a partition is provided in the tray, and a strawberry pack or the like is accommodated in the partitioned section. [0003] However, in a conventional cardboard tray (refer to Japanese Patent Application Laid-Open No. 2002-19768), in which a tray material and a partition material are obtained from one cardboard, the cardboard is not used in the partition. The vertical lines were along the horizontal direction. In this case, when the cardboard trays are stacked, there is a problem that the partition buckles due to a vertical force, and the items inside are crushed. Accordingly, an object of the present invention is to provide a corrugated cardboard tray which improves the strength of the entire tray by improving the strength of the partition. According to the present invention, as a means for solving the above-mentioned problems, a bottom wall is provided at a central portion of one cardboard, and both sides of the bottom wall and a longitudinal direction of the cardboard are provided. An outer plate forming an outer surface of the side wall and an inner plate forming an inner surface of the side wall are sequentially connected to each other, extension pieces are respectively connected to both ends of the outer plate and the inner plate, and an outer end plate and the side wall are provided at both ends of the bottom wall. A crosspiece that covers a part of the upper end is sequentially provided, and a separating piece is formed on the inner plate by forming a cut line from the upper end to the lower end of the inner plate. In the above invention, the outer plate and the inner plate are bent in the vertical direction to form a side wall, and end walls are formed at both ends of the raised side wall and opposed extension pieces are engaged with each other. Then, the outer end plate is bent in the vertical direction and overlapped with the end wall from the outside, and a part of the upper end of the side wall is covered with a crosspiece, thereby forming a cardboard tray. Furthermore, a partition having the same height as the side wall is formed by separating the partition pieces from the inner plate of the side wall and combining them with each other. Since the vertical partition of the cardboard is placed inside the tray made of corrugated cardboard, the vertical compressive strength and bending strength of the vertical corrugated cardboard are improved compared to the horizontal partition of the cardboard. No buckling or buckling. In addition, the height of the partition is the same as the height of the side wall, which helps to protect the contents. Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a cardboard tray 1 according to the present invention.
And made of double-faced cardboard. FIG. 2 is a development view of the cardboard tray 1. The vertical length of the cardboard tray 1 is along the left-right direction in FIG. The cardboard tray 1 has outer plates 3a, 3b and inner plates 5 on both sides of the bottom wall 2.
a and b are sequentially provided via two fold lines, while outer end plates 7a and b and bars 8a and b are provided sequentially at both ends of the bottom wall 2 via the fold lines. At both ends of the outer plates 3a, b, outer extension pieces 10a, d, 10b, c are provided, respectively. At both ends of the inner plates 5a, b, inner extension pieces 12a, d, 12b, c are provided.
c are provided respectively. Two fold lines are formed between the outer extension pieces 10a to 10d and the inner extension pieces 12a to 12d. On both sides of the bars 8a and 8b, locking pieces 13 are provided.
a, b and locking pieces 13c, 13d are formed respectively. The locking pieces 13a, 13b, 13c, 13d are fitted to both upper ends of the outer plates 3a, 3b, respectively.
Lock holes 14a, b, c, and d for locking a, b, c, and d are formed, respectively. Further, the locking holes 14a,
b, c, d and the locking pieces 13a,
Positioning part 1 having a shape substantially matching the tip shape of b, c, d
5a, b, c and d are formed respectively. Further, projections 16a, b, c, d are provided at the upper center of the outer plates 3a, b by making a cut line. Further, rectangular positioning holes 17a, b, c, d are provided on the fold line between the outer plates 3a, b and the bottom wall 2. Further, fitting holes 18a, 18b for fixing partitions, which will be described later, are provided at the lower center of the outer plates 3a, 3b, respectively. The inner plates 5a and 5b are provided with the inner plate 5
Partition pieces 20a, 20b that can be separated by forming a score line from the upper end to the lower end of a, b are formed. Also, the inner plates 5a, b and the inner extension pieces 12a, b, c, d
Escape holes 22a, b, c, and d are formed between them. In assembling the corrugated cardboard tray 1, first, the partition pieces 20a and 20b are separated from the inner plates 5a and 5b. Next, as shown by an arrow A in FIG. 3, the outer plates 3a, b and the bottom
a, b and the inner plates 5a, 5b are started up. Subsequently, as shown by an arrow B in FIG. 3, the inner plate 5 is folded in a mountain at two fold lines between the outer plates 3a, b and the inner plates 5a, b.
a and b are arranged along the outer plates 3a and 3b to form a side wall having a frame structure. Also, at the same time as forming the side wall,
The outer extension piece 10a is formed by mountain-folding at two fold lines between the outer extension pieces 10a to 10d and the inner extension pieces 12a to 12d.
To 10d and the inner extension pieces 12a to 12d are overlapped. The superposed extension pieces are bent inward as indicated by arrow C in FIG. 3, and the opposing inner extension pieces 12a to 12d are engaged with each other to form an end wall. When this extension piece is bent inward, the inner plate 5
a, b and the inner extension pieces 12a to 12d
Since 2a to 22d are formed, bending is easy and assembly workability is good. Then, as shown by an arrow D in FIG. 3, the outer end plates 7a and 7b are bent in the vertical direction and overlap the end walls from outside. Then, the bars 8a and 8b are connected to the outer end plate 7
a, b and the bars 8a, b are folded at the fold line,
In the state where 3a, b, c, and d are folded, the locking pieces 13a,
The bars 8a and 8b are locked by fitting b, c and d into the locking holes 14a, b, c and d, respectively. Thereby, the bars 8a and 8b cover a part of the upper end of the side wall, and the state shown in FIG. 1 is obtained. Then, the partition piece 20 that has been separated first is
a and b are combined with each other to form a partition 20a or 20
The projections formed on both ends of the b are fitted into the fitting holes 18a, 18b of the outer plates 3a, 3b and arranged inside the corrugated cardboard tray 1 to constitute a partition of the corrugated cardboard tray 1. The vertical length of the corrugated cardboard of the partition pieces 20a and 20b constituting this partition extends in the vertical direction as shown in the figure. The partition has the same height as the side wall of the cardboard tray 1. Next, the operation of the cardboard tray 1 having the above configuration will be described. The user stores packs of vegetables, fruits, and the like in each section partitioned by the partition inside the cardboard tray 1. As shown in FIG. 4, when a plurality of cardboard trays 1 are stacked, the projections 16a, b, c, and d of the lower adjacent cardboard trays 1 are aligned with the positioning holes 17a, b, Each of the cardboard trays 1 is positioned by fitting into c and d. At this time, the weight of the cardboard tray 1 located on the upper side acts on the side wall and the end wall of the cardboard tray 1, but the side wall and the end wall maintain the shape without bending since they have a frame structure. To make a cardboard tray 1
It doesn't collapse. Also, the bars 8a and 8b are the cardboard trays 1
Of the upper cardboard tray, the stored contents are protected even if the upper cardboard tray 1 is displaced. Then, the cardboard tray 1 located on the upper side is
Even if the position is shifted beyond a and b, the partition having the same height as the side wall of the corrugated cardboard tray 1 is placed on the upper side of the corrugated cardboard tray without bending because the vertical line of the corrugated cardboard is in the vertical direction. 1 to support the weight and protect the contents. As is apparent from the above description, according to the present invention, a bottom wall is provided at the center of one corrugated cardboard, and the outer walls are formed on both sides of the bottom wall and in the longitudinal direction of the corrugated cardboard. An outer plate and an inner plate forming the inner surface of the side wall are sequentially connected, extension pieces are respectively connected to both ends of the outer plate and the inner plate, and an outer end plate and a crosspiece that partially covers the upper end of the side wall are provided at both ends of the bottom wall. Are sequentially connected to each other, and the inner plate is cut off from the upper end to the lower end of the inner plate to form a partition piece that can be separated, and the vertical line of the corrugated cardboard is formed on a corrugated cardboard tray. By arranging the cardboard, the compressive strength and bending strength in the vertical direction are improved as compared with the conventional partitions in which the longitudinal edges of the cardboard are along the horizontal direction, and the stored items can be protected reliably.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cardboard tray according to an embodiment of the present invention. FIG. 2 is an exploded view of the cardboard tray shown in FIG. 1; FIG. 3 is a perspective view showing a state where the cardboard tray shown in FIG. 2 is assembled. FIG. 4 is a perspective view showing a state in which the cardboard trays of FIG. 1 are stacked. DESCRIPTION OF SYMBOLS 1 ... Corrugated cardboard tray 2 ... Bottom walls 3a, b ... Outer plates 5a, b ... Inner plates 7a, b ... Outer end plates 8a, b ... Bars 10a-d ... Outer extension pieces 12a-d ... Inside Extension pieces 20a, b ... partition pieces

   ────────────────────────────────────────────────── ─── Continuation of front page    F term (reference) 3E006 AA03 BA01 CA04 DA03 DB04                 3E060 AA03 AB18 BB01 BB05 BC02                       CC13 CC14 CC17 CC32 CC45                       CD03 CD12 DA07 DA08 DA12                       DA23 EA06 EA12                 3E096 AA13 BA27 BB07 CA03 CB03                       CC01 DA01 DB08 DC01 EA01X                       FA20 GA09

Claims (1)

Claims 1. A bottom wall is provided at a central portion of one corrugated cardboard, and an outer plate forming an outer wall surface on both sides of the bottom wall and a longitudinal direction of the corrugated cardboard and an inner plate forming an inner wall surface of the side wall. Sequentially extended pieces are respectively provided at both ends of the outer plate and the inner plate, and an outer end plate and a crosspiece that partially covers the upper end of the side wall are sequentially provided at both ends of the bottom wall. A corrugated cardboard tray, characterized in that a partition line that can be cut off is formed by applying a score line from the upper end to the lower end of the inner plate on the inner plate.