BACKGROUND OF THE INVENTION
The present invention relates generally to collapsible crates and more particularly to a collapsible crate with support members for supporting another container thereon.
Collapsible crates are well known. Four walls each connected via a hinge to a base are selectively movable about the hinge between a use position, in which the wall is generally perpendicular to the base, and a collapsed position onto the base. Various latch mechanisms have been provided to connect adjacent walls at the corner to selectively lock the crate in the use position.
Some collapsible crates also include retractable supports so that another, different-type container (typically a nestable container) can be supported thereon. One such crate includes end walls each having a support that is pivotable between a support position and a retracted position. Lower ends of the supports are pivotably connected to the end walls, with the upper edges of the supports retractable below the upper edges of the end walls. The supports on the collapsible crates do not extend very far into the mouth of the container (i.e. not far from the end wall). In contrast, the nestable crates include supports that are pivotably connected to the side walls, so the supports easily extend much further into the mouth of the crate in the support position. As a result, one problem with some of these collapsible crates is that the nestable crate can fall in between the supports if the nestable crate is not correctly placed on the supports.
Some of the existing crates automatically deploy the support when the end wall is pivoted to the upright position. Due to the position of the support on the interior surface of the end wall, the user has a tendency to grab both the support and the end wall when pivoting the end wall to the upright position. As the end wall reaches the upright position, the support must escape the grip of the user in order to be deployed, which is inefficient and uncomfortable for the user.
Another problem is that supports in some collapsible crates are sometimes knocked back toward the retracted position as the upper container is placed on the supports.
SUMMARY OF THE INVENTION
The present invention provides a container having a plurality of walls extending upwardly from a base. At least one wall has a support pivotably mounted by a hinge. The support is pivotable between a support position where it can support another container thereon and a retracted position against the wall.
In one feature of the present invention, the end wall can be moved toward the collapsed position while the support is in the support position, but the support is pivoted into the retracted position just as the end wall contacts the base. This can provide several other optional benefits. First, when the end wall is collapsed onto the base, the support is spaced away from the upper edge of the end wall, so the user can grasp the end wall without also grasping the support. Second, the support must be lifted to be retracted, so it is unlikely that placing another container thereon could knock the support back to the retracted position. Third, the contact area of the support on the side wall can be increased, increasing the strength of the support. Fourth, the support extends further into the mouth of the crate, providing a more stable stacking surface.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a container according to one embodiment of the present invention with its walls in an assembled, upright, use position.
FIG. 2 is a perspective view of the container of FIG. 1 with its walls in a collapsed position.
FIG. 3 is a top view of the container of FIG. 1.
FIG. 4 is a side view of the container of FIG. 1.
FIG. 5 is an end view of the container of FIG. 1.
FIG. 6 is an interior view of one of the corners of the container of FIG. 1.
FIG. 7 is an enlarged view of the corner of FIG. 6.
FIG. 8A is a top perspective view of one end of the support.
FIG. 8B is a bottom perspective view of the support of FIG. 8A.
FIG. 9 is a perspective view of one end of one of the end walls.
FIG. 10 is an exterior perspective view of the corner of FIG. 6.
FIG. 11 shows the end wall being moved between the upright position and the collapsed position.
FIG. 12 shows the end wall moving closer to the collapsed position.
FIG. 13 shows the end wall in the collapsed position on the base.
FIG. 14 is a side view, broken away, of the container of FIG. 13.
FIG. 15 shows the container of FIG. 1 with another, different container stacked on the support.
FIG. 16 is an interior perspective view of the corner of FIG. 6 with the support being pivoted toward the retracted position.
FIG. 17 is a view similar to that of FIG. 16 with the support in the retracted position.
FIG. 18 is an enlarged end view of a corner of the container.
FIG. 19 is a section view taken along line 19-19 of FIG. 18 and showing the support in both the support position and the retracted position.
FIG. 20 is a section view taken along line 20-20 of FIG. 18 and showing the support in both the support position and the retracted position.
FIG. 21 is a section view taken along line 21-21 of FIG. 18 showing the support in the retracted position.
FIG. 22 a view similar to that of FIG. 21 showing the support in the support position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 is a perspective view of a collapsible container 10. The container 10 includes a base 12, upstanding side walls 14 (or long walls) and upstanding end walls 18 (or short walls). The end walls 18 are pivotably connected along short edges of the base 12. The side walls 14 are pivotably connected to side upstanding portions 16 formed integrally with the base 12. Each end wall 18 includes a handle portion 19 defined above a handle opening 21.
Each end wall 18 has a support 20 formed of Acetal, polypropylene, glass filled Nylon or other suitable material. The support 20 is pivotably mounted to an upper end of the end wall 18. The supports 20 are shown in FIG. 1 pivoted to a support position, where they project into the interior of the container 10 so they can support another container stacked thereon. The supports 20 each include a tab 22 projecting from each end into the adjacent side wall 14. A flange 24 protrudes downwardly from each tab 22. An upper flange 26 protrudes upwardly from each tab 22.
The interiors of the side walls 14 each include a pair of curved channels 30 formed therein with spaced-apart, upwardly-directed projections or tabs 32 spaced inwardly of the channels 30. The channels 30 are aligned with the tabs 22 on the supports 20, so that the end walls 18 can be pivoted onto the base 12 prior to the side walls 14 being collapsed, such that the side walls 14 are collapsed onto the end walls 18, as shown in FIG. 2.
FIG. 3 is a top view of the erected container 10 of FIG. 1. FIG. 4 is a side view of the container 10. FIG. 5 is an end view of the container 10.
FIG. 6 is an interior perspective view of a quarter of the container 10 (the rest of the container is symmetric, as shown in FIG. 1). As shown, the side wall 14 includes a rail 38 at the top of the curved channel 30 and generally aligned with the tabs 32. The interior of the side upstanding portion 16 includes a channel 34 opening to the bottom of the curved channel 30 and extending further along the side of the container 10. As shown in FIG. 7, the flange 24 of the support 20 is received behind the rail 38 and in the channel 30, such that tab 22 of the support 20 interlocks with the side wall 14.
FIG. 8A is a top rear perspective of a one end of the support 20. The support 20 includes an elongated support portion 40 having a front rail 42 extending upwardly therefrom. The support portion 40 extends between outer ends of two arms 44 (one shown) that pivotably connect at their inner ends to the end wall 18 (FIG. 7). At the inner end of the arm 44, a hinge portion includes a cylindrical recess 46. A pin 48 protrudes inwardly from the arm 44 adjacent the recess 46.
FIG. 8B is a bottom front perspective of end of the support 20 of FIG. 8A. As shown, the flange 24 is elongated along most of the arm 44 and defines a channel 50 adjacent thereto having an upper surface 51. The arm 44 has a reinforced area 49 for transferring the load from the elongated support portion 40 to the channel 50.
FIG. 9 illustrates a side end 52 of one of the end walls 18. Near the upper edge, the end wall 18 includes a hinge pin 54 having an arcuate recess 56 adjacent thereto.
FIG. 10 is an exterior perspective view of one corner of the container 10. The pin 48 of the support 20 is slidably received in the arcuate recess 56 of the end wall 18. The hinge pin 54 of the end wall 18 is rotatably received in the recess 46 of the support 20. Thus, as the support 20 pivots on the end wall 18 about the hinge pin 54, the pin 48 slides within the arcuate recess 56 of the end wall 18.
FIG. 11 illustrates the end wall 18 as it is being collapsed toward the base 12, after the latch 36 is released. The flange 24 of the support 20 is retained behind the tabs 32 so that the tab 22 is retained in the channel 30 in the side wall 14. Thus, the support 20 is initially in the support position as the end wall 18 is collapsed. As shown in FIG. 12, the support 20 is generally in the support position relative to the end wall 18 as the support 20 passes through the side wall 14 as the end wall 18 is moving toward the collapsed position. The tab 22 and flange 24 (not visible in FIG. 12) then pass into the channel 34 on the interior of the side upstanding portion 16, where they contact a curved surface 35 that pivots the support 20 upwardly relative to the end wall 18, so that the end wall 18 can lie flat on the base 12 as shown in FIGS. 13 and 14.
When the end wall 18 is subsequently erected again, the process is repeated in reverse, such that the support 20 is in the support position again by the time the end wall 18 is latched to the side wall 14 as shown in FIG. 6. It should be noted that the handle portion 19 of the end wall 18 can be grasped in FIG. 13 and held by the user without interference from the support 20 as the end wall 18 is latched into position with the side walls 14. In the container 10 shown in the drawings, the support 20 always leaves room for the user to grasp the handle 19.
With the supports 20 in the support position, another container 100 can be supported on the supports 20, as shown in FIG. 15. With the support 20 extending substantially perpendicularly to the end wall 18 from its pivot point, the support 20 is resistant to being accidentally knocked back out of the support position during the placement of the container 100 on the supports 20. Further, since the support 20 extends into the interior of the container 100 substantially farther than prior art supports, it is easier to place the container 100 stably on to the supports 20.
During loading of the container 10, the supports 20 can be pivoted to an upright position uncovering the mouth of the container 10. FIG. 16 illustrates one of the supports 20 being pivoted upwardly relative to the end wall 18. FIG. 17 illustrates the support 20 in the retracted, upright position.
FIG. 18 is an enlarged exterior end view of one corner of the container 10 for the purpose of demonstrating the section lines for FIGS. 19, 20 and 21. FIG. 19 illustrates a section view through the end wall 18 and support 20, which is shown in both the support position and in the retracted position. The hinge pin 54 of the end wall 18 is rotatably received in the recess 46 of the support 20. The support 20 pivots about an axis P that is above a load plane of the support 20 in the support position (i.e. the plane where the support 20 contacts the container 100 in FIG. 15, which is the upper surface of the arm 44), which prevents a user from accidentally bumping the support 20 out of the support position.
Referring to FIG. 20, the pin 48 moves between a lower position when the support 20 is in the support position and an upper position when the support 20 is in the retracted, upright position. In the upper position, the pin 48 contacts a stop surface 60 that limits any further movement of the support 20. In the retracted position, the center of mass of the support 20 is inward of the pivot axis P, such that the support 20 will be naturally returned to the support position by force of gravity when released.
Referring to FIG. 21, when the support 20 is in the upright retracted position (the support 20 in the support position is not shown in FIG. 21), the arm 44 abuts a stop surface 64 on the side wall 14 that limits the rotation of the support 20. In the retracted position, the weight of the support 20 is inward of the pivot axis P, such that the support 20 will be naturally returned to the support position by force of gravity when released. However, when the end wall 18 is collapsed onto the base 12, the support 20 will be able to pivot fully upward relative to the end wall 18 so that the end wall 18 and support 20 can lie flat on the base 12, as shown in FIGS. 13 and 14, because it will not contact the stop surface 64 on the side wall 14.
Additionally, if the end wall 18 is moved toward the collapsed position when the support 20 is in the retracted position shown in FIG. 21, the contact of the support 20 with the stop surface 64, which is below the pivot point P of the support 20, will force the support 20 to rotate toward the support position as shown in FIG. 22.
FIG. 22 is taken along the same section line as FIG. 21, but shown with the support 20 in the support position. As shown, the upper surface 51 of the channel 50 formed on the underside of the arm 44 of the support 20 matches the upper edge of the rail 38 on the side wall 14. The amount of surface contact between the support 20 and the side wall 14 in this area is maximized, as this is where most of the load is supported. The flange 24 and rail 38 are elongated to provide maximum material strength interlocking between the support 20 and side wall 14.
In accordance with the provisions of the patent statutes and jurisprudence, exemplary configurations described above are considered to represent a preferred embodiment of the invention. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope. For example, in any of the occurrences above, the hinge members and hinge pins could be reversed and formed on opposite parts. Alphanumeric identifiers on method steps are for convenient reference in dependent claims and do not signify a required sequence of performance unless otherwise indicated in the claims.
Patent Application
20100012654
