JPH11255238A - Tray formed of corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the load shift caused by the transverse shifting by surely engaging upper and lower trays with each other when they are stacked. SOLUTION: In a tray formed of corrugated fiberboard, a peripheral wall 20 having a double structure is erected around a bottom plate 1, an engagement projection 21 is provided on a top part of the peripheral wall 20, an engagement hole 13 corresponding to the engagement projection 21 is formed in an edge part of the bottom plate 1, and the transverse shifting is prevented by engaging the engagement projection 21 of a tray on the lower stage side with the engagement hole 13 in a tray on the upper stage side when they are stacked. The engagement projection 21 is formed by providing a projecting piece 10 on an upper edge of an embracing piece 8 embraced by the double peripheral wall 20, returning the projecting piece 10 downward, and projecting its edge part upward through a through hole 12 cut in the top part of the peripheral wall 20, and the projection of the engagement projection 21 is set to be large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard tray having means for preventing lateral displacement during stacking.

[0002]

2. Description of the Related Art As shown in FIG. 6, a double wall 54 is formed of an outer plate 51, a top plate 52 and an inner plate 53 which are successively connected to a bottom plate 50 as shown in FIG. An engagement protrusion 56 is formed by bending the two cut lines 55 and 55 in a chevron shape, and at the time of stacking, the engagement protrusion 56 is engaged with the upper tray to prevent lateral displacement. Have been.

[0003]

However, in the above-described tray, since the engagement protrusion 56 projects from the top plate 52 in a small amount, the trays are easily disengaged from each other due to impact or vibration, and the load collapses. There was a problem that it was easy to get up.

Accordingly, an object of the present invention is to reliably engage upper and lower trays during stacking to prevent collapse of a load due to lateral displacement.

[0005]

In order to solve the above-mentioned problems, a tray according to the present invention has a peripheral wall having a double structure standing around a bottom plate, and an engaging projection is provided on a top portion of the peripheral wall. An engaging hole corresponding to the engaging protrusion is formed at an edge of the cardboard, and the engaging protrusion of the lower tray and the engaging hole of the upper tray are engaged during stacking to prevent lateral displacement. In the tray made of a material, the engaging projection is provided with a projecting piece at the upper end edge of the holding piece held by the double peripheral wall, and this projecting piece is turned downward, and the ridge is formed at the top of the peripheral wall. It was formed by projecting upward through the through hole.

With this configuration, the protrusion amount of the engagement protrusion can be set large, so that the upper and lower trays can be securely engaged at the time of stacking, and the engagement protrusion is doubled and cut at the upper end. Since there is no surface and the lower end is supported by being sandwiched between the double peripheral walls, it is difficult to wobble and has excellent strength, and the stability of the stacked state is improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the blank shown in FIG. 1, an outer plate 2, a top plate 3 and an inner plate 4 are provided on both side edges of a bottom plate 1, and an outer end plate 5, a top plate 6 and an inner end plate 7 are provided at both end edges. The holding pieces 8 and 9 are respectively provided continuously on both side edges of the outer plate 2 and the inner plate 4. A projecting piece 10 is provided on the outer edge of the embedment piece 8 toward the concave portion of the embedment piece 9, and a fold line 11 in the width direction is formed on the projecting piece 10.
A pair of through holes 12 are formed in the ridges of the top plate 6 and the inner end plate 7, and a pair of engagement holes 13 are formed in both ends of the bottom plate 1, the inner edge of the holding piece 8 and the outer edge of the holding piece 9. Is provided with a notch 14.
A pair of lock pieces 1 are provided at the tip edges of the inner plate 4 and the inner end plate 7.
5 and 16 are provided, and a pair of lock holes 17 are formed on both sides of the bottom plate 1. Locking pieces 18 are provided at both ends of the inner end plate 7, and cuts 19 are provided at both ends of the inner end plate 4.
Are provided respectively.

In order to assemble the blank into a tray as shown in FIG. 4, as shown in FIGS.
In the upright direction, the top plate 3 in the horizontal direction, and the inner plate 4 in the downward direction. Then, the holding pieces 8 and 9 are bent inward, and the protruding piece 10 is bent inward and downward along the fold line 11.
Next, the outer end plate 5 is set in the upright direction, the top plate 6 is set in the horizontal direction,
The inner end plate 7 is sequentially bent downward to form the peripheral wall 20 by sandwiching the holding pieces 8, 9 between the outer end plate 5 and the inner end plate 7,
An engaging projection 21 is formed by projecting the ridge of the protruding piece 10 upward from the through hole 12. Further, the lock pieces 15 and 16 are inserted into the lock holes 17 and the engagement holes 13 respectively, and the lock pieces 18 are inserted.
Is engaged with the notch 19 to keep the shape. In this assembled state, the engagement hole 13 and the notch 14 coincide.

When stacking the trays T as shown in FIGS. 4 and 5, the engaging projections 21 of the lower tray T are inserted into the engaging holes 13 of the upper tray T, and the trays T are stacked. Engage each other.

Here, in the tray T having the above structure, the amount of projection of the engagement projection 21 from the top plate 6 can be set large, so that the engagement projection 21 of the lower tray T is moved upward even when impact or vibration is applied. The trays T do not fall out from the engagement holes 13, thereby preventing collapse of the load due to lateral displacement of the upper and lower trays T.

Further, since the engaging projections 21 are doubled, there is no cut surface at the upper end, and the lower end is supported by being sandwiched between the outer end plate 5 and the inner end plate 7, so that it is hard to wobble and has excellent strength. And the stability of the stacked state is improved.

Further, since the upper end ridge of the engaging projection 21 has a mountain shape, the engaging holes 1 of the upper tray T are stacked at the time of stacking.
3 is guided by the engagement protrusion 21 of the lower tray T, and the upper and lower trays T can be easily positioned.

[0013]

When the tray is constructed as described above, the protrusion amount of the engaging projection can be set large, so that the upper and lower trays can be reliably engaged at the time of stacking, and the collapse of the load due to the lateral displacement can be prevented. be able to.

Further, since the engaging projections are doubled, there is no cut surface at the upper end, and the lower end is supported by being sandwiched by the double peripheral wall. The performance is improved.

Further, since the upper edge of the engagement projection is formed in a mountain shape, the engagement holes of the upper tray are guided by the engagement projections of the lower tray during stacking, so that the upper and lower trays can be easily positioned. Can be done.

[Brief description of the drawings]

FIG. 1 shows a tray blank according to the present invention.

FIG. 2 is a perspective view showing an assembling process of the same.

FIG. 3 is a perspective view showing an assembling process of the same.

FIG. 4 is a perspective view showing a stacked state of the above.

FIG. 5 is a vertical sectional side view of a main part of the above.

FIG. 6 is a perspective view of a main part of a conventional tray.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom plate 8, 9 Embedding piece 10 Projection piece 13 Engagement hole 20 Peripheral wall 21 Engagement projection

Claims (1)

[Claims] 1. A peripheral wall having a double structure is erected around a bottom plate, an engagement projection is provided on a top of the peripheral wall, and an engagement hole corresponding to the engagement projection is formed on an edge of the bottom plate. In a corrugated cardboard tray configured to prevent lateral displacement by engaging an engagement protrusion of a lower tray and an engagement hole of an upper tray during stacking, the engagement protrusion is held by the double peripheral wall. A protrusion is provided at the upper end edge of the holding member, and the protrusion is turned downward, and the ridge is formed to protrude upward through a through hole formed in the top of the peripheral wall. Cardboard tray.