초록 ▼

A reusable box has a floor having opposite side edges and opposite end edges bridging the side edges, respective side walls extending upward from the side edges, a fixed end wall extending upward from one of the end edges and fixedly bridging between the side walls, and a movable end wall extending

A reusable box has a floor having opposite side edges and opposite end edges bridging the side edges, respective side walls extending upward from the side edges, a fixed end wall extending upward from one of the end edges and fixedly bridging between the side walls, and a movable end wall extending in a closed position upward from the other of the end walls and fitting between the side walls. The movable end wall is displaceable between a position clear of the side walls and giving access to an interior of the box at the other end. Formations extend to upper edges of both of the end walls that for nesting interfit and that for stacking vertically engage each other.

대표청구항 ▼

I claim: 1. A reusable box comprising: a floor having opposite side edges and opposite end edges bridging the side edges; respective side walls extending upward from the side edges; a fixed end wall extending upward from one of the end edges and fixedly bridging between the side walls; a movable en

I claim: 1. A reusable box comprising: a floor having opposite side edges and opposite end edges bridging the side edges; respective side walls extending upward from the side edges; a fixed end wall extending upward from one of the end edges and fixedly bridging between the side walls; a movable end wall extending in a closed position upward from the other of the end edges and fitting between the side walls, the movable end wall being displaceable away from the fixed end wall from the closed position into an open position clear of the side walls and giving access to an interior of the box at the other end, the side walls and movable end wall having adjacent upwardly open holes; at least one upwardly flaring vertical groove and at least one upwardly tapering vertical ridge extending to an upper edge of each of the end walls and terminating at upper and lower edges of the respective end walls at respective flat and horizontal support surfaces, the grooves and ridges being dimensioned and shaped such that, for nesting, they interfit when the fixed and movable end walls of an upper such box are set down respectively on the fixed and movable end walls of a lower such box and that, for stacking, they vertically engage each other at the support surfaces to support the upper box above the lower box when the fixed and movable end walls of the upper box are set down respectively on the movable and fixed end walls of the lower box; and a pair of U-shaped elements having legs fittable into the holes and extending between the movable end wall and the side walls for releasably securing the movable end wall in the closed position. 2. The box defined in claim 1, further comprising latching formations extending horizontally between the movable end wall and the side walls and snugly interfitting in the closed position. 3. The box defined in claim 2 wherein the latching formations are teeth on confronting vertical edges of the movable end wall and side walls. 4. The box defined in claim 3 wherein the teeth have rounded edges. 5. The box defined in claim 1 wherein there are an odd number of vertically extending grooves and ridges on one of the end walls and an even number of vertically extending grooves and ridges on the other of the end walls. 6. The box defined in claim 1 wherein the walls are all canted outward such that the box tapers downward toward the floor. 7. The box defined in claim 1, further comprising a hinge between an end edge of the floor and a lower edge of the movable end wall. 8. The box defined in claim 1 wherein the movable end wall is generally U-shaped and has a flat bight part extending full width between the side walls and a pair of short U-legs aligned in the closed position with the side walls. 9. The box defined in claim 1 wherein when the boxes are stacked with the movable end wall in the closed position and the U-shaped elements fitted to the holes, each overlyng box sits atop the U-shaped elements of the underlying box and retains them in the holes, whereby the respective movable end wall is locked in the closed position.