JP2001354229A - Lock mechanism and tray of corrugated board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the job of putting fruits or vegetables in or out of a tray. SOLUTION: A corrugated board tray is formed in such a manner that a pair of side walls 2 and a pair of end walls 3, all of which continue from the perimetral edges of a bottom wall 1, are erected, bendable pieces 4 respectively extending from both ends of each side wall 2 are aligned to the inside of the corresponding end wall 3, a bar plate 5 extending from the upper edge of each end wall 3 is bent inward to engage the side walls. In the corrugated board tray, lock pieces 7 respectively extend from both ends of each end wall 3. Lock holes 8 are respectively made in both ends of the each side wall 2. The lock pieces 7 are obliquely pushed into the corresponding lock holes 8 to temporarily fasten the side walls 2 and the end wall 3 together. This allows fruits or vegetables to be put in or out of the tray with the bar plates 5 extending upwards.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for temporarily holding two cardboards in a standing position and a cardboard tray provided with the lock mechanism.

[0002]

2. Description of the Related Art Conventionally, as a tray for transporting fruits and vegetables, a pair of side walls and end walls connected to the periphery of a bottom wall are independently erected, and bent pieces extending from both side edges of the side walls are formed. A corrugated cardboard is used in which a crosspiece extending along the inside of the end wall and extending from the upper end edge of the end wall is bent inward to engage the crosspiece with the side wall.

[0003]

However, in such a tray, when the crossboard is flipped up, the upright state of the side wall and the end wall cannot be maintained, so that the fruits and vegetables are put in and out while the crossboard is bent inward. And there is a problem that workability is poor.

Accordingly, an object of the present invention is to make it possible to temporarily fix a side wall and an end wall of a cardboard tray.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a locking piece on one of two corrugated cardboards and a locking hole on the other corrugated cardboard. A locking mechanism of the cardboard for locking the locking piece by obliquely pushing it into the locking hole is provided, and the locking mechanism temporarily fixes the side wall and the end wall of the cardboard tray.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0007] The blank shown in FIG.
Consist reinforced cardboard of 200 g / m ^2, its the peripheral edge of the bottom wall 1 the pair of side walls 2, 2 and end walls 3, 3 are continuously provided, the bent piece 4 is continuously provided on both side edges of the side walls 2 Have been. A crosspiece 5 is continuously provided on the leading edge of the end wall 3, and outer covering plates 6 are continuously provided on both side edges of the crossboard 5. The crossboard 5 is wider than the bottom wall 1 and slightly protrudes on both sides of the bottom wall 1.

On both side edges of the end wall 3, bent pieces 4 are cut and locking pieces 7 are protrudingly provided. On both sides of the side wall 2, locking holes 8 are formed. The locking piece 7 is wider toward the distal end, the width of the distal end is wider than the locking hole 8, and the base width is approximately the same as the locking hole 8. The base ruled line of the locking piece 7 is located inside the ridge line of the side wall 2 and the bent piece 4 when the tray is formed.

An insertion piece 9 protrudes from a tip edge of the outer cover plate 6, and an insertion hole 10 is provided in the side wall 2 along a ridge line with the bottom wall 1. Engagement projections 11 are provided on both sides of the front edge of the side wall 2.
However, engaging holes 12 are respectively provided on both sides of the crosspiece 5 along the ridge line with the outer cover plate 6, and a protruding portion 13 is provided at the center of the front end edge of the side wall 2.

In order to assemble the blank and store fruits and vegetables, first, as shown in FIG.
2 and the end walls 3, 3 are erected, and the bent piece 4 is bent along the inside of the end wall 3.

Next, when the locking piece 7 is pushed into the locking hole 8,
The locking piece 7 is opened obliquely and fits into the locking hole 8 with a large contact area, and the fitting maintains the upright state of the side wall 2 and the end wall 3. Can be stored in a tray.

Then, after storing the fruits and vegetables, as shown in FIG. 3, the crosspiece 5 is bent inward, the engaging projections 11 are engaged with the engaging holes 12, and the outer covering plate 6 is placed outside the side wall 2. When the insertion piece 9 is inserted into the insertion hole 10 by bending downward along the side, the side wall 2 and the end wall 3 are fixed in an upright state, and the tray T
Has a solid structure.

Further, since the locking piece 7 is covered with the outer cover plate 6, the appearance is good, and the locking piece 7 is prevented from falling out of the locking hole 8 during transportation, so that fruits and vegetables can be taken out at a market or the like. In this case, even if the cross board 5 is flipped up, the side walls 2 and the end walls 3 do not fall, and the fruits and vegetables do not jump out.

As shown in FIG. 4, the upper part of the tray T is slightly open when viewed from the side, and when a plurality of trays T are stacked, the lower part of the upper tray T becomes the side wall of the lower tray T. 2 between the opposing projections 13, 13, which prevents the short-side direction from being shifted by the projections 13 and the projection 13 of the lower tray T and the outer cover plate 6 of the upper tray T. Since the side edges abut each other and the displacement in the long surface direction is prevented, the load does not collapse.

In a tray for a light-weight object, the upright state of the side wall and the end wall may be maintained only by the above-described lock mechanism.

Further, the lock mechanism can be applied to a cushioning material formed by bending a cardboard.

[0017]

As described above, according to the present invention, the side wall and the end wall of the tray are temporarily fixed by the lock mechanism for obliquely pushing the locking piece into the locking hole. Fruits and vegetables can be taken in and out as they are, improving workability.

[Brief description of the drawings]

FIG. 1 is a view showing a blank of a cardboard tray 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 assembled state of the same.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom wall 2 Side wall 3 End wall 4 Bending piece 5 Crosspiece 6 Outer covering board 7 Locking piece 8 Locking hole 9 Plugging piece 10 Plugging hole

Claims (3)

[Claims] 1. A corrugated cardboard which is provided with a locking piece in one corrugated cardboard and a locking hole in the other corrugated cardboard, and the locking piece is obliquely pushed into the locking hole and locked. Lock mechanism. 2. A pair of side walls and an end wall connected to the peripheral edge of the bottom wall are erected, and bent pieces extending from both side edges of the side wall are arranged along the inside of the end wall, and from a top edge of the end wall. A side wall and an end wall of the corrugated cardboard tray in which the extended crossboard is bent inward and the crossboard and the side wall are engaged with each other can be locked by the lock mechanism according to claim 1. Corrugated cardboard tray. 3. The cardboard tray according to claim 2, wherein the locking pieces extending from the end wall are covered with outer cover plates extending from both side edges of the crosspiece.