Pallet for heavy loads

Abstract: A molded plastic pallet (10) for holding coiled aluminum stock, the pallet including an octagonal shaped platform (12) on which the coiled material rests, a pair of grooves (26,28) in the bottom of the platform (12), a centering ring (14) on the top of the platform (12) and a pair of legs (16,18) on the bottom of the platform, coiled material being banded to the pallet by wrapping tie strips (52,54) around the coiled stock and the grooves (26,28).

Description: TECHNICAL FIELD The present invention relates generally to a pallet as defined in the preamble of claim 1, and more particularly to a plastic pallet for securing and transporting heavy, coiled materials. Pallets have been used in the handling and shipping of various goods for many years. Pallets are used to protect various goods, to provide support during handling, and to facilitate the movement of such goods with machines such as forklifts. Typical pallets include a surface or platform on which the goods nay be set, as well as some type of legs which hold the platform off the ground. Maintaining a space between the platform and ground allows the pallets to be easily picked up and moved. With heavy goods, a forklift is generally used to move the goods since the fork can simply be slid between the platform and ground, and then the goods may be lifted. Originally, pallets were made from wood, but now many other materials such as molded plastics are being used. An example of a plastic pallet as defined in the preamble of claim 1 is shown in Figs. 5 to 9 of US-A-3 880 093. The pallet of this embodiment has a quadratic platform with rounded corners. Four legs extend from the bottom surface and are arranged in a square leaving spaces between the ends of adjacent legs. Within these spaces slots or perforations are arranged through the four corners of the pallet. A steel strapping for fastening the coil will extend through the slots and diagonally across the lower surface of the pallet. For this reason, the legs of the pallet have to be designed so short so as to leave unobstructed diagonal pathways for the straps. The straps lie flat on to the lower surface of the platform. The embodiment of Figs. 1 to 4 US-A-3 880 093 describes a pallet which supports the coil not on the top surface of a platform but on four webs arranged in extension of the arms of a centering cross, and on portions of a peripheral rim. The legs and all other reinforcing ribs or areas extending from the lower side of the pallet include recesses forming cross channels for receiving steel strapping. GB-A-1 374 866 describes a plastic pallet reinforced with wooden slats embedded in the plastic material. The pallet of Figs. 6 and 7 is octagonal in shape and has a platform with a top surface and a bottom surface. Three legs extend lengthwise from the bottom surface. The pallet is adapted to hold octagonal containers. The pallet does not show any specific means for positioning fastening straps for the container. Pallets have been made from molded plastic to provide durability and to facilitate manufacture. Plastic pallets can also be recycled if damaged. Plastic pallets have been formed into various shapes and types, but are not adequate for various uses. When used to transport heavy coiled stock such as aluminum, the edges of the pallet often crack when the pallet is tipped on its side to release the coil from the pallet if the pallet is substantially greater in size than the rolled stock. Additionally, the legs do not always provide adequate support for heavy materials. It is an object of the present invention to provide a plastic pallet for heavy coiled stock. According to claim 1 such a pallet has an octagonal shape generally corresponding to the diameter of the coil which permits the pallet to be tipped by an upender to release the coiled stock without breaking the edges of the pallet. The octagonal shape also prevents the pallet from rolling when tipped on its side. In order to provide adequate support on the bottom of the pallet, the legs have been formed as an integral part of the pallet and extend across the bottom of the pallet platform. Each of the legs is continuous and provides consistent support across the bottom of the pallet. Since the legs extend lengthwise in a parallel direction, there is ample room for insertion of the tongs on a forklift. Banding grooves are provided in the bottom of the platform. In accordance with another aspect of the invention, the grooves terminate in grooves in the edges of the platform. The banding grooves are of a length corresponding to the diameter of the coiled stock so that the banding straps used to hold the coiled stock on the surface of the platform aids in centering the coiled stock on the pallet. Other principal features and advantages of the invention will become apparent to those skilled in the art upon review of the following drawings, the detailed description and the appended claims. A preferred exemplary embodiment of the invention will be described in conjunction with the appended drawing, wherein like numerals denote like elements, and: Figure 1 is a top view of a pallet of the invention; Figure 2 is a side view showing a heavy coiled roll banded to the pallet; Figure 3 is a bottom view of the pallet; Figure 4 is a cross-sectional view of the pallet taken along line A-A of Figure 3; and Figure 5 is a cross-sectional view taken along line B-B of Figure 3. Before explaining at least one embodiment of the invention in detail it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments or being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purposes of description and should not be regarded as limiting. Referring to the figures in the drawings, a plastic pallet 10 in accordance with the present invention comprises a platform 12, having a first leg 16, and a second leg 18. The platform 12 is generally octagonal in shape and is molded as an integral unit having the legs 16 and 18 extending from the lower surface 20 of platform 12. The platform 12 has eight edges 24 which are tangent to a circle "A" having a diameter 6,3 to 12,7 mm (¼ " to ½") larger than the diameter "B" of the coil stock 32. The inner diameter will vary in 5 cm (two inch) increments from 1 to 2 m (40" to 80") to accommodate coil stock of approximately the same diameter. A centering ring 14 may be provided on platform 12 for centering the coil stock on the platform. Platform 12 includes a top surface 22, lower surface 20, and eight edges or sides 24. In lower surface 20 are a first groove 26 and a second groove 28 which are recessed in the bottom of the platform 12 and located in a perpendicular relation to each other. The groove 26 runs parallel to legs 16 and 18 and passes through the center of lower surface 20 of platform 12. Groove 28 also passes through the center of lower surface 20, but runs perpendicular to groove 26 and to legs 16 and 18. Respective apertures 30 are generally square in cross section and extend through legs 16 and 18 in alignment with groove 28. The grooves 26 and 28 terminate in slots 25 provided in the edges 24 at each end of the grooves 26 and 28. The slots 25 are 3,2 to 6,3 mm (⅛" to ¼")deep to accommodate the bands 52 and 54. It should be noted that the slots 25 are generally aligned with the outside diameter of the coiled stock. The centering ring 14 may be provided on the top of the pallet 10 to help to hold the coiled stock in place. The centering ring 14 is molded as an integral part of platform 12. When platform 12 is loaded with coiled stock 32, the centering ring 14 will extend partially through the center of the coiled stock. Centering ring 14 preferably extends 12,7 to 50 mm (½" to two inches) above top surface 22. An external edge 34 of centering ring 14 abuts against an inside cylindrical surface 33 of coiled stock 32 so that coiled stock 32 cannot shift along top surface 22 when pallet 10 is moved. The external edge may be chamfered to aid in centering the coiled stock on the pallet. A flat surface 35 of coiled stock 32 rests against top surface 22. Although a full ring has been described for the centering ring, a centering ring formed by pins or cross members may also be used. Legs 16 and 18 extend downward from bottom surface 20. Both legs have the same shape and are disposed in parallel arrangement on opposite sides of pallet 10. Each leg runs lengthwise, perpendicular to groove 28 and is continuous completely across bottom surface 20 of platform 12. Each leg runs parallel to groove 26 and is located approximately midway between groove 26 and the outermost edge of platform 12. Preferably, legs 16 and 18 extend at least 7,5 cm (three inches) from bottom surface 20 to provide adequate space for a fork lift truck. Each leg includes an outer wall 36 and a longer inner wall 38. Each leg also comprises respective ends 40. Ends 40 are multi-surfaced ends including short surface 42, an exterior surface 44, a tapered surface 46 and a lower surface 48. The end surfaces abut one another in a manner which gives each end a generally rounded exterior. Inset in each leg is a recessed slot 50 which extends upwardly from a bottom surface 52 into the center of each leg. Slot 50 runs longitudinally along the bottom of each leg for a substantial portion of the length of each leg. When coiled stock 32 is placed upon pallet 10, the flat side 35 of coiled stock 32 rests on top surface 22 of pallet 10. Tie straps or bands 52 and 54 are used to securely hold the coiled material against top surface 22. A first tie strap or band 52 is positioned so that it runs within groove 26, wraps around the slots 25 in the edges of pallet 10 and continues over the top of the coiled material so that the coiled material is squeezed downward against top surface 22 when tie strap or band 52 is pulled tight. Similarly, a second tie strap 54 is positioned so that it runs within groove 28 and passes through apertures 30 in legs 16 and 18. Tie strap 54 also continues around the outer edge of the platform in slots 25 and over the top of coiled material 32 so that it holds the coiled material 32 against top surface 22. It should be noted that the slots 25 are generally aligned with the coil so that the bands 52 and 54 center the coil on the pallet. Various tie straps can be used, including metal tie bands, so long as the tie straps can be tightened in order to hold the coiled material securely against top surface 22 of pallet 10. Thus, it should be apparent that there has been provided in accordance with the present invention a pallet for heavy loads that fully satisfies the aims and advantages set forth above. Although the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the scope of the appended claims.

Claims: A molded one piece plastic pallet (10) for securely holding coiled materials (32) comprising: a platform (12) having a top surface (22) and a lower surface (20), said platform (12) having an inside diameter substantially equal to the outside diameter of the coil stock (32), and respective legs (16,18) extending from said lower surface (20) of said platform (12) and disposed lengthwise in parallel arrangement, characterized in that said platform (12) has eight sides (24) and a generally octagonal shape configured to securely hold a coiled material having coils (32) which extend into close proximity to each side (24), and said platform (12) includes a pair of banding grooves (26, 28) recessed in said lower surface (20). The pallet of claim 1 including a first groove (26) disposed parallel to said legs (16,18), a second groove (28) disposed perpendicular to said legs (16,18), and respective recesses (30) in communication with said second groove (28) and extending through said legs (16,18) whereby a tie strap (54) can be inserted through said legs (16,18) and remain within said second groove (28). The pallet of claim 2 wherein said recesses are formed as apertures (30). The pallet of any one of claims 1 to 3, wherein there are two legs (16,18), each substantially greater in length than in width and each containing an outer side (36) and an inner side (38), said inner side (38) being longer than said outer side (36). The pallet of any one of claims 1 to 4, wherein each leg (16,18) extends at least 7.5 cm (three inches) from said lower surface (20) of said platform (12). The pallet of any one of claims 1 to 5, wherein a centering ring (14) is disposed in the center of a top surface (22) of said platform (12). The pallet of claim 6 wherein said ring (14) extends less than 5 cm (two inches) from said top surface (22). The pallet according to claim 6 or 7, wherein said centering ring (14) on said top surface (22) is formed integral with said pallet (10). The pallet according to any one of claims 1 to 8, wherein said grooves (26,28) terminate in slots (25) provided in said sides (24), each slot (25) being located in alignment with the outside surface of the coiled stock (32) whereby a band (52,54) wrapped around said grooves (26,28) and said coiled stock (32) will center said coil stock (32) on said pallet (10).

Inventors: BACH GARY M, BAEHNMAN CARL R, HIGHFIELD TERRY T, HOLT FREDERICK M JR, BACH, GARY M., BAEHNMAN, CARL R., HIGHFIELD, TERRY T., HOLT, FREDERICK, M., JR.
Applicants: REYNOLDS CONSUMER PROD, REYNOLDS CONSUMER PRODUCTS, INC.
Application year: 1991
Main classification: B65D19
IPC codes: B65D19, B65D85