Tray

Abstract

To provide a tray for stabilizing a side wall and a sash bar plate.SOLUTION: A tray 1 has front and rear end walls 20, 20 and right and left side walls 30, 30 continued to a bottom plate 10, and right and left sash bar plates 40, 40 protruded inward from upper edge parts of both side walls 30, 30, respectively. The tray 1 has a left flap 50 continued to the left sash bar plate 40 and overlapping an inner face of the end wall 20, and a right flap 60 continued to the right sash bar plate 40 and overlapping the inner face of the end wall 20. A lower engagement part 51 is protruded at a lower part of the left flap 50, and an upper engagement part 61 is protruded at an upper part of the right flap 60. The upper engagement part 61 of the right flap 60 enters between an engagement part 41 projecting from an edge part of the left sash bar plate 40 and the lower engagement part 51 of the left flap 50.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tray.

Background Art

[0002] As a cardboard tray, there is one having front and rear end walls and left and right side walls connected to a bottom plate, and left and right flaps connected to both side walls are overlapped on the inner surface of the end walls, and the tip portions of the left and right flaps are engaged with each other in the vertical direction (see, for example, Patent Document 1). In this configuration, by connecting the left and right flaps connected to the left and right side walls respectively, the opening of both side walls in the left - right direction is suppressed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above - described conventional tray, concave portions that are recessed in the vertical direction are formed at the tip portions of the left and right flaps, and the concave portions are combined with each other in the vertical direction. In this configuration, since the tip portions of the flaps are likely to move in the vertical direction, there is a problem that the side walls are difficult to be stabilized.

[0005] An object of the present invention is to solve the above - described problems and provide a tray capable of stabilizing side walls and crossbars.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention provides a tray, which comprises a bottom plate, front and rear end walls connected to the bottom plate, left and right side walls connected to the bottom plate, and left and right cross bars protruding inward from the upper edges of both side walls. Further, the tray includes a left flap connected to the left cross bar and overlapped on the inner surface of the end wall, and a right flap connected to the right cross bar and overlapped on the inner surface of the end wall. A lower engaging portion protruding rightward from the upper part is formed at the lower part of the left flap, and an upper engaging portion protruding leftward from the lower part is formed at the upper part of the right flap. The upper engaging portion of the right flap enters between a locking portion protruding from the edge of the left cross bar and the lower engaging portion of the left flap.

[0007] In the tray of the present invention, the left flap and the right flap are connected to the side walls via the cross bars. The vertical movement of the right flap is restricted by the locking portion of the left cross bar and the lower engaging portion of the left flap, and the vertical movement of the left flap is restricted by the upper engaging portion of the right flap. Therefore, in the tray of the present invention, since it is difficult for the left flap and the right flap to move vertically, the side walls and the cross bars can be stabilized. In addition, the strength of the cross bar against the force when gripping and pulling up the cross bar can be increased.

[0008] In the above-described tray, when a first partition plate extending in the front-rear direction is provided between the two side walls, it is preferable to connect the left and right tip edges of the cross bar to the upper edge of the first partition plate. In this configuration, when assembling the tray, when the cross bar is bent inward with respect to the side wall, since the first partition plate is disposed between the two side walls, a tray with an internal space partitioned left and right can be easily assembled.

[0009] In the above-described tray, when a second partition plate extending in the left-right direction is provided between the two side walls, it is preferable to connect the upper part of the second partition plate to the upper part of the first partition plate via a bent portion. In this configuration, when assembling the tray, if the crossbars are bent inward with respect to the side walls, the first partition plate and the second partition plate are arranged between the two side walls, so that a tray with an internal space partitioned in the front-back, left-right, and up-down directions can be easily assembled.

Advantages of the Invention

[0010] In the tray of the present invention, since the left flap and the right flap continuously provided on the side walls via the crossbars are difficult to move in the vertical direction, the side walls and the crossbars can be stabilized, and the strength of the crossbars against vertical forces can be increased.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0012] Embodiments of the present invention will be described in detail with appropriate reference to the drawings. In the following description, the front-back, left-right directions are set for convenience in explaining the tray of the present embodiment, and do not limit the configuration and usage form of the tray.

[0013] As shown in Fig. 1, the tray 1 of this embodiment includes a bottom plate 10, front and rear end walls 20, 20 connected to the bottom plate 10, and left and right side walls 30, 30 connected to the bottom plate 10. Further, the tray 1 includes front, rear, left, and right crossbars 40 protruding inward from the upper edges of both side walls 30, 30, a left flap 50 overlapped on the inner surface of the end wall 20, and a right flap 60 overlapped on the inner surface of the end wall 20. Also, on the bottom plate 10 of the tray 1, a first partition plate 70 extending in the front-rear direction and a second partition plate 80 extending in the left-right direction are erected.

[0014] As shown in Fig. 2, the tray 1 of this embodiment is formed by mountain-folding or valley-folding a blank sheet S cut out from a cardboard sheet at each fold line. The blank sheet S shown in Fig. 2 is arranged so that the inner surface side is visible. The fold lines of the blank sheet S are ruled lines (pressed ruled lines) formed by linearly pressing the surface of the blank sheet S. Incidentally, intermittent cuts may be formed in the ruled lines. By doing so, it becomes easier to bend the blank sheet S at the fold lines. Alternatively, the fold lines may be configured by intermittently forming half-cut cuts that only cut the surface of the sheet or cuts that penetrate the sheet and forming them linearly.

[0015] As shown in Fig. 4, the bottom plate 10 is formed in a quadrilateral shape (see Fig. 2). At the front edge of the bottom plate 10, the front end wall 20 is connected via a fold line. The front end wall 20 is formed in a quadrilateral shape and extends upward from the front edge of the bottom plate 10. The front end wall 20 is formed perpendicular to the bottom plate 10. At the rear edge of the bottom plate 10, the rear end wall 20 is connected via a fold line. The front and rear end walls 20, 20 are formed symmetrically in the front and rear.

[0016] At the left edge of the bottom plate 10, the left side wall 30 is connected via a fold line. The left side wall 30 is formed in a quadrilateral shape and extends upward from the left edge of the bottom plate 10. The left side wall 30 is formed perpendicular to the bottom plate 10. In the middle part of the upper edge of the left side wall 30, an inner wall 31 is continuously provided via a folding line. The inner wall 31 is folded inward with respect to the side wall 30 and overlaps the inner surface of the side wall 30.

[0017] On the right edge of the bottom plate 10, a right side wall 30 is continuously provided via a folding line. The left and right side walls 30, 30 are formed symmetrically left and right. In the middle part of the upper edge of the right side wall 30, an inner wall 32 is continuously provided via a folding line. The inner wall 32 is folded inward with respect to the side wall 30 and is overlapped on the inner surface of the side wall 30 in a double-folded state.

[0018] At the front end of the upper edge of the left side wall 30, as shown in FIG. 1, a left front crossbar 40 is continuously provided via a folding line. Also, at the rear end of the upper edge of the left side wall 30, a left rear crossbar 40 is continuously provided via a folding line. The crossbar 40 is bent inward with respect to the side wall 30. The crossbar 40 extends perpendicular to the side wall 30. The crossbar 40 extends in a strip shape along the upper edge of the end wall 20. The crossbar 40 is formed to be half the length of the upper edge of the end wall 20.

[0019] At the front end and the rear end of the upper edge of the right side wall 30, a right front crossbar 40 and a right rear crossbar 40 are continuously provided via a folding line. The front and rear crossbars 40, 40 on the right side are formed symmetrically left and right with respect to the front and rear crossbars 40, 40 on the left side. The tip edges of the left and right crossbars 40, 40 are butted against each other at the center in the left - right direction of the upper opening of the tray 1.

[0020] The first partition plate 70 is arranged at the center in the left - right direction between the left and right side walls 30, 30. In this embodiment, the left and right first partition plates 70, 70 are overlapped. The first partition plate 70 extends in the front - rear direction across the front and rear inner surfaces of the inner space of the tray 1. The two first partition plates 70, 70 divide the inner space of the tray 1 into left and right parts.

[0021] At the front end of the upper edge of the left first partition plate 70, the leading edge of the left front crossbar 40 is continuously provided via a broken line. Also, at the rear end of the upper edge of the left first partition plate 70, the leading edge of the left rear crossbar 40 is continuously provided via a broken line (see Fig. 4). At the front end of the upper edge of the right first partition plate 70, the leading edge of the right front crossbar 40 is continuously provided via a broken line. Also, at the rear end of the upper edge of the right first partition plate 70, the leading edge of the right rear crossbar 40 is continuously provided via a broken line (see Fig. 4).

[0022] The second partition plate 80 is disposed at the central portion in the front-rear direction between the left and right side walls 30, 30. The second partition plate 80 extends in the left-right direction across the left and right inner surfaces of the inner space of the tray 1. The inner space of the tray 1 is partitioned into front and rear parts by the second partition plate 80. The inner space of the tray 1 of the present embodiment is partitioned into four spaces in the front, rear, left, and right directions by both first partition plates 70, 70 and the second partition plate 80.

[0023] The upper edge of the second partition plate 80 is continuously provided with the upper part of the left first partition plate 70 via a bent portion 71. The bent portion 71 is a part of the central portion in the front-rear direction of the upper part of the left first partition plate 70, and is formed in a quarter-circular shape in the present embodiment. The bent portion 71 is vertically bent so as to protrude to the left with respect to the first partition plate 70. The upper edge of the bent portion 71 is continuously provided with the upper edge of the second partition plate 80 via a broken line. The second partition plate 80 is folded back rearward with respect to the bent portion 71. Also, the left and right first partition plates 70, 70 are inserted into a connecting recess 81 formed at the lower edge of the second partition plate 80.

[0024] In the state of the blank sheet S shown in FIG. 2, the inner walls 31, 32 and the second partition plate 80 are accommodated in the region surrounded by the side wall 30, the two crosspieces 40, 40 and the first partition plate 70. Thus, since the blank sheet S is formed in a substantially rectangular flat plate shape, when manufacturing the blank sheet S, the portion to be cut out from the sheet is reduced, the cut scraps can be reduced, and resources can be effectively utilized.

[0025] As shown in FIG. 1, at the front edge of the left front crosspiece 40, a front left flap 50 is continuously provided via a broken line. The left flap 50 is bent downward with respect to the left front crosspiece 40. The left flap 50 is overlapped on the inner surface of the front end wall 20. The lower edge of the left flap 50 is in contact with the upper surface of the bottom plate 10.

[0026] As shown in FIG. 3, the upper part of the left flap 50 is formed shorter than the front edge of the left front crosspiece 40. The left flap 50 is not continuously provided at the tip (right end) of the front edge of the left front crosspiece 40. As shown in FIG. 1, at the front edge of the left front crosspiece 40, a locking portion 41 protruding forward is formed at the portion where the left flap 50 is not continuously provided. The protruding length of the locking portion 41 is about the thickness of the blank sheet. A lower engaging portion 51 protruding rightward from the upper part is formed at the lower part of the left flap 50. The tip of the lower engaging portion 51 is arranged on the right side of the central portion in the left - right direction of the end wall 20. A portion recessed to the left of the central portion in the left - right direction of the end wall 20 is formed between the locking portion 41 of the crosspiece 40 and the lower engaging portion 51 of the left flap 50.

[0027] At the lower edge of the left flap 50, at the position corresponding to the central portion in the left - right direction of the end wall 20, a fixing concave portion 52 recessed upward is formed. Two fixing protrusions 72, 72 protruding from the front edges of the left and right first partition plates 70, 70 are inserted into the fixing concave portion 52.

[0028] At the front edge of the right front crossbar 40, a front right flap 60 is continuously provided via a broken line. The right flap 60 is bent downward with respect to the right front crossbar 40. The right flap 60 is overlapped on the inner surface of the front end wall 20.

[0029] As shown in FIG. 3, the lower part of the right flap 60 is formed shorter than the front edge of the right front crossbar 40. On the upper part of the right flap 60, an upper engaging portion 61 protruding leftward from the lower part is formed. The tip of the upper engaging portion 61 is arranged on the left side of the central portion of the end wall 20 in the left - right direction.

[0030] The upper engaging portion 61 of the right flap 60 enters between the locking portion 41 of the left crossbar 40 and the lower engaging portion 51 of the left flap 50. That is, the upper engaging portion 61 of the right flap 60 is sandwiched in the vertical direction by the locking portion 41 of the left crossbar 40 and the lower engaging portion 51 of the left flap 50. Thereby, when the right flap 60 tries to move upward, the upper engaging portion 61 abuts against the locking portion 41 and the upward movement is restricted. Also, when the right flap 60 tries to move downward, the upper engaging portion 61 abuts against the lower engaging portion 51 and the downward movement is restricted.

[0031] At the rear edge of the left rear crossbar 40, a rear left flap 50 is continuously provided as shown in FIG. 1. Also, at the rear edge of the right rear crossbar 40, a rear right flap 60 is continuously provided. The rear left flap 50 and the rear right flap 60 are formed symmetrically with respect to the front left flap 50 and the front right flap 60 in the front - rear direction.

[0032] When assembling the tray 1 of this embodiment, first, as shown in FIG. 4, the front and rear end walls 20, 20 and the left and right side walls 30, 30 are erected with respect to the bottom plate 10. Subsequently, the inner walls 31, 32 are folded back with respect to the both side walls 30, 30, and the inner walls 31, 32 are overlapped on the inner surface of the side wall 30. Also, the left flaps 50 and the first partition plate 70 are raised with respect to the left double crosspieces 40, 40. At this time, when the fixing protrusion 72 of the first partition plate 70 is inserted into the fixing recess 52 of the left flap 50, the left flap 50 and the first partition plate 70 become stable. The second partition plate 80 is bent together with the first partition plate 70 with respect to the double crosspieces 40, 40 and hangs down with respect to the double crosspieces 40. Also, the right flaps 60 and the first partition plate 70 are raised with respect to the right double crosspieces 40, 40.

[0033] As shown in FIG. 5, when the front and rear crosspieces 40, 40 are bent inward with respect to the left side wall 30, the left flap 50 is overlapped on the inner surface of the end wall 20, and the left first partition plate 70 and the second partition plate 80 are arranged at the central portion between the both side walls 30, 30. The second partition plate 80 is arranged above the first partition plate 70.

[0034] Also, as shown in FIG. 6, when the front and rear crosspieces 40, 40 are bent inward with respect to the right side wall 30, the right flap 60 is overlapped on the inner surface of the end wall 20, and the right first partition plate 70 is arranged at the central portion between the both side walls 30, 30, and the left and right first partition plates 70, 70 are overlapped.

[0035] Also, the fixing protrusions 72, 72 of the both first partition plates 70, 70 are inserted into the fixing recess 52 of the left flap 50. Thereby, the both first partition plates 70, 70 are kept in a state of standing upright perpendicularly to the bottom plate 10.

[0036] Subsequently, as shown in FIG. 1, the bent portion 71 of the left first partition plate 70 is bent so as to protrude leftward with respect to the left first partition plate 70, and the second partition plate 80 is folded back downward with respect to the bent portion 71. At this time, the both first partition plates 70, 70 are inserted into the connecting recess 81 of the second partition plate 80. As a result, both the first partition plates 70, 70 and the second partition plate 80 are arranged in a cross shape in the internal space of the tray 1 in plan view. In this way, the internal space of the tray 1 can be easily partitioned into four spaces in the front, rear, left, and right directions.

[0037] Further, the upper engaging portion 61 of the right flap 60 is disposed above the lower engaging portion 51 of the left flap 50. Further, the tip of the upper engaging portion 61 enters between the locking portion 41 of the left crosspiece 40 and the lower engaging portion 51 of the left flap 50.

[0038] In the tray 1 of the present embodiment as described above, as shown in FIG. 3, the right flap 60 continuously provided on the right crosspiece 40 is restricted in its vertical movement by the locking portion 41 of the left crosspiece 40 and the lower engaging portion 51 of the left flap 50. Further, the left flap 50 continuously provided on the left crosspiece 40 is restricted in its vertical movement by the upper engaging portion 61 of the right flap 60. Therefore, in the tray 1 of the present embodiment, since it is difficult for the left flap 50 and the right flap 60 to move in the vertical direction, the left and right side walls 30, 30 and each crosspiece 40 can be stabilized.

[0039] Further, when the crosspiece 40 is gripped and pulled up to move the tray 1, the crosspiece 40 is supported by the left flap 50 and the right flap 60, so that the strength of the crosspiece 40 against the pulling force can be increased.

[0040] As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above embodiments, and can be appropriately modified without departing from the spirit thereof. In the tray 1 of the present embodiment, as shown in FIG. 1, the left flap 50 and the right flap 60 are provided in the front and rear directions, but the left flap 50 and the right flap 60 may be provided only on one side in the front and rear directions.

[0041] In the tray 1 of the present embodiment, as shown in FIG. 3, the tip of the lower engaging portion 51 of the left flap 50 enters the right side of the central portion in the left-right direction of the end wall 20, but the tip of the lower engaging portion 51 may be disposed at the central portion in the left-right direction of the end wall 20 or on the left side of the central portion.

[0042] In the tray 1 of the present embodiment, as shown in FIG. 1, the internal space is partitioned into four spaces by the first partition plate 70 and the second partition plate 80, but the number and shape of the partition plates are not limited. Furthermore, the partition plates may not be provided. For example, when the second partition plate 80 is continuously provided also on the right first partition plate 70 and the two second partition plates 80, 80 are arranged at intervals in the front-rear direction, the internal space of the tray 1 can be partitioned into six spaces. In addition, when another first partition plate 70 is continuously provided between the front and rear cross plates 40, 40 and the second partition plate 80 is continuously provided on the other first partition plate 70 and the four first partition plates 70 are arranged at intervals in the left-right direction, the internal space of the tray 1 can be partitioned into eight spaces.

[0043] The tray 1 of the present embodiment is made of cardboard, but the tray may be formed of various known paperboards.

Explanation of reference numerals

[0044] 1 Tray 10 Bottom plate 20 End wall 30 Side wall 31 Inner wall on the left side 32 Inner wall on the right side 40 Cross plate 41 Locking portion 50 Left flap 51 Lower engaging portion 52 Concave portion for fixing 60 Right flap 61 Upper engaging portion 70 First partition plate 71 Bending portion 72 Protrusion for fixing 80 Second partition plate Concave portion for connection 81 S blank sheet

Claims

1. A bottom plate, front and rear end walls connected to the bottom plate, left and right side walls connected to the bottom plate, left and right cross bars protruding inward from the upper edges of both side walls respectively, a left flap connected to the left cross bar and overlapping the inner surface of the end wall, a right flap connected to the right cross bar and overlapping the inner surface of the end wall, and comprising: a lower engaging portion protruding rightward from the upper part is formed at the lower part of the left flap, an upper engaging portion protruding leftward from the lower part is formed at the upper part of the right flap, the upper engaging portion of the right flap is characterized in that it enters between a locking portion protruding from the edge of the left cross bar and the lower engaging portion of the left flap. A tray.

2. The tray according to claim 1, a first partition plate extending in the front-rear direction is provided between both side walls, the left and right front edge portions of the cross bar are connected to the upper edge portion of the first partition plate. A tray characterized by this.

3. The tray according to claim 2, a second partition plate extending in the left-right direction is provided between both side walls, the upper part of the second partition plate is connected to the upper part of the first partition plate via a bent portion. A tray characterized by this.

Images