Stackable collapsible shipping rack
FIELD OF THE INVENTION 
     This invention relates generally to a rack and more particularly to a shipping rack which is capable of being collapsed and stacked when the shipping rack is either in its normally upright position or when the shipping rack is in its collapsed position. 
     BACKGROUND OF THE INVENTION 
     It has long been recognized that an easy convenient and relatively inexpensive way to transport food stuffs and the like (for example, such crushables as tomatoes) from one point to another can be achieved through the loading of shipping racks with the articles and then placing those articles in a motor conveyance or the like. In the past there have been shipping racks which have been suitable for this task and have done the job relatively efficiently. However, on the return trip the racks themselves were the only cargo unless food stuffs or the like were also able to be carried in the same racks because the racks were in fact not suited to all purposes. The carrier could not make the return trip with bulk goods and the like because the cargo space was occupied by the racks. Hence, the cost of delivery was higher than it needed to be if a way could be found to effectively utilize the return trip. Additionally, time, money, and energy was accordingly wasted and in general inefficiently utilized. 
     The applicant has provided a device wherein the shipping racks are stackable and collapsible such that in their collapsed position they take up only a fractional portion of the space that they took up when they were in their normally upright position. In this manner, the carrier or the like may transport foodstuffs and the like on the trip and bulk goods and the like on the return trip, with the racks taking up only a minimum of space. Thusly, the return trip can be used for transporting goods as well as the rack and thereby effectively utilizing the carrier&#39;s energy and other resources. 
     Overall, the invention is of great importance since it relates to the field of saving energy. As the President has recently noted, new and effective ways to save energy must now be found and it is of grave national concern that it be done so immediately. This invention is of that field and should be accordingly given judicious treatment. 
     OBJECTS OF THE INVENTION 
     One object of this invention is to provide a stackable shipping rack capable of being collapsed and stacked in either its collapsed or upright positions. 
     Another object of this invention is to provide a collapsible shipping rack with guide means wherein the guide means are suitable for supporting shelves and the like. 
     Another object of this invention is to provide a collapsible shipping rack wherein there are four legs and each leg has a bottom, middle, and top section and the middle section has at least one hinge means on each leg. 
     Another object of this invention is to provide a collapsible shipping rack wherein the shipping rack includes a base having guide means. 
     Another object of this invention is to provide a collapsible shipping rack of generally rectangular shape. 
     Another object of this invention is to provide a collapsible shipping rack wherein the middle section collapses towards the bottom section such that no portion of the middle section crosses the center line of the base. 
     It is a general object of this invention to provide a shipping rack of the type described generally herein and which is well adapted for the purposes which are set forth herein. 
     In accordance with these and other objects which will become more apparent hereinafter, the instant invention will now be described with reference to the accompanying drawings in which: 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a frontal elevational view of the collapsible shipping rack shown with the legs in an upright position; 
     FIG. 2 is a side elevational view showing the invention in its upright position; 
     FIG. 3 is a top plan view of the invention; 
     FIG. 4 is a frontal elevational view showing the invention in its collapsed position with one collapsed rack on top of another; 
     FIG. 5 is a side elevational view showing the rack in a collapsed position with one container on top of another; 
     FIG. 6 is a partially exploded perspective view of the bottom connection end of one rack mating with the top connection end of the next rack; 
     FIG. 7 is a partially exploded perspective view of one rack in a collapsed position with the bottom connection end of another rack mating with the inside surface of the hinge of the collapsed rack. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENT 
     Referring to the drawings wherein like reference characters designate like or corresponding parts throughout the several views and referring particularly to FIG. 1, there is shown the invention generally designated by the numeral 12. As can be seen from FIG. 1 there is shown another rack 12&#39; positioned atop rack 12. Additionally rack 12 is positioned on top of another rack 12&#34;. The collapsed rack includes a base generally designated by the numeral 14 spanning legs 16. 
     The legs include a bottom section 18 with a terminal end 20 having positioning means 22. The positioning means are sized and configured for mating and confining engagement with the top end of another collapsible rack such as 12&#34; as will be explained more fully hereinafter. 
     The legs include a middle section 30 having hinge means such as at 32 and 34. As shown in FIG. 1 there are a pair of hinge means on each leg spaced approximately the same distance on each leg from the terminal end. However, as can be readily appreciated by one skilled in the art there may be two or more hinge means or as few as one hinge means on a leg. 
     The legs include a top section 40 having a top terminal end 42 with positioning means 44. The positioning means 44 is sized and configured for compatible engagement with the bottom section positioning means 22 of another collapsible rack. As shown in FIG. 1 the collapsible rack 12&#39; having a bottom section 18&#39;, a terminal end 20&#39; and a positioning means 22&#39; fits compatibly on top of top terminal end positioning means 44. 
     As shown in FIG. 2 the collapsible rack includes guide means such as those at 150 spanning leg 16. The guide means may be of any suitable material and by spanning the legs and the guide means give the collapsible rack added strength. As will be readily appreciated by one skilled in the art, the guide means may be of various sizes and configurations for accommodating the shelving as will be explained more fully hereinafter. The guide means depicted in the embodiment shown in FIG. 1 are generally elongate right angle brackets spanning legs 16 as shown in FIG. 2 having a backing portion 152 and a bottom portion 154 orthogonal to the backing portion. The guide means are spaced apart approximately an equal distance in the embodiment shown in FIG. 2. As will be readily appreciated by one skilled in the art this need not be the case but rather it is helpful in illustrating applicant&#39;s invention. 
     With particular reference to the embodiment shown in FIG. 1, there is shown the shelving 50 in mating engagement with the guide means 40. As shown in the embodiment depicted in FIG. 1, the base 14 can also accommodate a shelf when it is supplied with guide means such as those at 150. It will be noticed that in this embodiment the guide means are spaced approximately double the spacing of the other guide means. As will be readily appreciated by one skilled in the art, this need not be the case and guide means can be included along that portion of the leg denoted by the numeral 17. However, when the base is equipped with a guide means spaced approximately double the distance that the other guide means are spaced apart from one another, the rack can be collapsed easily as will be explained more fully hereinafter. 
     With particular reference to FIG. 3, there is shown the top view of the collapsible rack 12. The rack is shown as a generally rectangular figure, however other configurations and sizes are possible as will be readily appreciated by those skilled in the art. 
     With particular reference to FIG. 4, there is shown the rack in one collapsed position with another rack on top of it. Rack 12&#39; is shown atop rack 12 with the positioning means 22 engaging the inside surface of the hinge means of 12 as will be explained more fully hereinafter. The top section of leg 16 is collapsed at hinge 34 and is folded toward the middle section 30. The middle section 30 is collapsed at hinge 32 and folded toward the bottom section 18. The shelves 50 may be removed from the guide means 40 and placed on top of the base which may be provided with its own guide means as previously explained. 
     As shown in the embodiment of the invention depicted in FIG. 4, the top section 40 is collapsed until the terminal end 42 and is in abutting relation with the guide means 40. As will be readily appreciated by those skilled in the art, the guide means 150 depicted in FIG. 4 need not be present and the terminal end of the top section may be sized and configured such that the top section may abut the middle section more closely with another point of the top section abutting the middle section. 
     The middle section is collapsed at hinge 32 as previously explained and is folded with the bottom section and reaches a point where the middle section is generally parallel with the base 14 as depicted in FIG. 4. As will be readily appreciated by those skilled in the art, the shelves 50 may be removed and the middle section will fall further toward the bottom section 18 and the middle section will be closer to the base. In fact, the middle section and the top section may be sized and configured such that the sections are in abutting relation with the base as will be readily appreciated by those skilled in the art. 
     With particular reference to FIG. 7, there is shown the hinge 32 with the middle section 30 in the collapsed position. The middle section includes a roller pin means 35 having two ends 37 connecting to either side of the hinge 32 such that the middle section is hingedly captivated for collapsible rotation at hinge 32. The terminal end of the bottom section of another container 20&#39; is shown with positioning means 22&#39; about to be engaged at hinge 32 of the other container. The hinge 32 includes an abutment surface 31 with side walls 33. The positioning means 22&#39; is placed on top of the abutment surface 31 and is captivated by hinge side walls 33 so that one rack may be put on another collapsed rack as shown in FIGS. 4 and 5 where there is shown collapsible rack 12&#39; in a collapsed position on top of collapsed rack 12. 
     With particular reference to FIG. 6, there is shown an enlarged view of the bottom terminal end of rack 12&#39; having positioning means 22&#39;. The rack 12&#39; is about to engage the top section of rack 12 as shown in FIGS. 4 and 5. The collapsible rack 12 includes a terminal end 42 having positioning means 44. The positioning means of each rack are sized and configured for mating and captivating engagement with one another. The positioning means 22&#39; engages the positioning means 44 as shown in FIG. 1. 
     In Use 
     In use the collapsible racks may be in their upright position for carrying various goods with the guide means serving as shelving supports and the shelves serving as supports for the items to be carried. When the goods are emptied at the destination point, the shelving 50 may be removed from the guide means and placed wherever convenient. One convenient place is at the base 14 when the base is provides with guide means. Other places may be equally suitable. The container can then be collapsed as at hinges 34 and 32 so that the container is in a collapsed position where it takes up far less room than in the upright position. The racks have been provided with stacking capability when in their collapsed and upright positions for easy transporting and efficient use of space. 
     As seen in FIG. 4, the space taken up by the collapsed rack is a small fraction of what it is as when the rack is erect. In this manner the truck or other moving conveyance on its return trip can used to move other goods in the space vacated by the collapsed rack. 
     While the instant invention has been shown and described herein in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is therefore not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent apparatus and articles.