Патент USA US2129394код для вставки
Sept- 6, 1938‘- T. F. ALLEN 2,129,394 BASKET TIPPING APPARATUS Filed NOV. 9, 1956 IN VEN TOR. MW BY 625a‘ A TTORNEY. Patented Sept. 6, 1938 2,129,394 UNITED STATES PATENT OFFICE 2,129,394 BASKET-TIPPING APPARATUS I I Thomas F. Allen, Watsonville, Calif. Application November 9, 1936, Serial No. 109,884 1 Claim. (Cl. 214—1.1) The present invention relates to improvements in basket-tipping apparatus. In my co-pending application entitled “Har vesting apparatus”, Ser. No. 77,711, ?led May 4, Gr 1936, I have disclosed, in connection with appara tus for handling lettuce and like vegetables, a sys tem which includes the use of large baskets for transporting lettuce from the ?eld to trimming and packing sheds. The system also includes mechanism for tipping these baskets after they have been removed from the truck‘ which trans ports them so that their contents are readily ac cessible to workers at the trimmers’ benches. The preferred form of this basket-tipping ap paratus comprises an overhead hoist, either hy draulic 'or pneumatic, connected with a pivoted frame in which the basket is placed to be swung or tipped by the hoist under control of the worker at the trimmers’ bench. Experience in the actual installation of such systems has proven that in some cases the vertical clearance in a packing shed is insu?icient to accommodate a hoist posi tioned above the basket-tipping frame and still allow space with the vertical movement necessary CR to tip the frame and basket the required distance. It is, therefore, the object of the present inven— tion to provide an improved basket-tipping ap paratus in which the space required for hoisting mechanism is minimized. Another object of the invention is to provide a compact hoisting mechanism for basket-tipping apparatus and the like through simple and inex pensive means without sacri?cing the advantage of a good leverage in the connection between the hoist. itself, and the basket-tipping mechanism. Other objects and advantages will be made ap parent in the following speci?cation, wherein ref erence is made to the accompanying drawing il lustrating one form of the invention. In the drawing— Fig. 1 is an end elevation of a basket-tipping apparatus embodying my invention; with the bar l2 so that a basket I! carried be tween the frames H is moved to a position where its contents are readily accessible to workers who stand before the bench Hi, this position of the basket being illustrated in dotted-lines in Fig. 1. The hoist, which may be of any conventional design, comprises a cylinder l5 containing a re ciprocable piston (not shown). A three-way valve l6 controls the ?ow of fluid, preferably air under pressure, to and from the lower end of the 10 cylinder. This valve has a._connection I‘! lead ing to a source of supply of compressed air and is connected by a conduit ill with the lower end of the hoist cylinder l5. The valve also includes an exhaust port l9 and a control lever 20 is op erable to manipulate the valve so that the com pressed air will be directed into the cylinder or will be permitted to escape from the cylinder, through the exhaust port l9. Cords 2| and 22 are connected with opposite ends of the valve control lever 20 with their ends hanging in a posi tion where ‘they may be conveniently grasped by a worker standing at the bench Ill to control the valve. The piston within the cylinder 15 is con nected by a "piston rod 25 with the center of a rigid spreader 26 (see Fig. 2) , which in the pres ent instance is illustrated as a channel-shaped metal bar. Cables 27 are secured to and depend from opposite ends of the spreader 26, and are connected one with each of the frames H at the points 28. The cables 26 are guided to their points of connection 28 by a pair of arcuate guides 30, which guides are channel-shaped in cross section to receive the cables and which are secured to the sides of the frames l l so that their upper ends ‘ terminate an appreciable distance from the cen ter of pivotal movement of the frames or the bar l2. The distance between the bar l2 and the up per ends of the arcuate guides 30 determines the leverage obtained in tipping the frame and basket by upward movement of the piston in the hoist. - Owing to the channel-shaped construction of Fig. 2 is a side elevation of the apparatus illus- . the guides and the fact that the cables lie freely trated in Fig. l; and Fig. 3 is a perspective view of one end of the apparatus. Referring to the drawing in detail, the basket tipping apparatus is shown as positioned adjacent a trimmer’s bench Ill. It comprises a pair of end frames, shown generally at I I, supported for piv otal movement about a horizontally disposed bar l2 carried by framework 13 rigidly supported rel ative to the ?oor. An overhead hoist is connected with the frames I I to raise them about their pivotal connection within the guides, tipping movement of the frame causes the cables gradually to leave the guides so that the point of contact of the cables with the guides approaches the point 28 at the bot tom of the load, where the cables are permanent ly attached. Owing to this construction the ver tical movement of the hoist necessary to move the basket from the full-line position illustrated in Fig. 1 to the dotted-line position there shown, or' farther, is considerably less than it would be if the cables were directly connected to any single point having an equal advantage of leverage. 2 v . 2,129,394 The frames II are shown as comprising a pair A basket-tipping apparatus constructed in the manner.,described above will operate efficiently of horizontal members 32 connected and braced ‘Y with-amel‘atively small overhead clearance and by diagonally disposed members 33, but any suit makes possible the installation of overhead hoists able construction, which is- preferably rigid and in sheds where it is otherwise necessary to cut light, may be employed, it being understood that away or raise a portion ‘of the roof, or install a the frames may be varied in-size and shape to ac horizontally disposed hoisting mechanism be commodate different types of baskets. These two neath the floor, involving more complicated and , side frames II are connected to each other as 11 lustrated in Fig. 2 by means of transversally ex 10 tending members 34 and 35, preferably of chan nel-shaped construction for the sake of adding to the rigidity of the frame-work. Other brace costly apparatus. , The invention has a wide variety of uses in har vesting and handling various kinds of fruits and vegetables. ‘It has proven of value in connection with harvesting melons, which may be placed in 10 members, as indicated at 36 and 31, may extend the large baskets as they are picked in the field, between the transverse members 34 and 35, and the baskets thereafter being tipped as above de 15 further bracing of any desired type may be used scribed to facilitate the removal of the melons where the size and-weight of the baskets to be therefrom one by one for sorting and grading. tipped make it advisable. The baskets are usual Likewise, carrots and other vegetables which grow ly provided with casters as indicated in dotted in the ground and must be washed after harvest lines at 38 to facilitate transporting them over ing can be expeditiously handled through the use of such large baskets and tipping mechanism. 20 the surface of the floor and in order to permit these casters to roll over the transverse member _While I have illustrated and described a pre 35. This member is preferably formed with down ferred form of my invention, it is to be under wardly offset portions 39 which may be received stood that various changes may be resorted to in in depressions formed in the floor so that their the construction and arrangement of its several 25 upper surfaces are flush with the floor to permit parts within the scope of the appended claim. the casters to roll freely over them as the baskets Having thus described my invention, what I are moved into and out of the frame. . claim and desire to secure by Letters Patent is The arcuate guides 30 are secured to the sides A basket-tipping apparatus for use in packing of the frames II and may be constructed as il sheds and the like which comprises in combina 30 lustrated in Figure 3 wherein a ?at arcuate plate tion a frame formed of end members rigidly con 40 is spaced from the frame I l by means of an ar nected by bottom members and front members cuate bar 4| to provide an intermediate chan and having an open back to permit rolling of nel for reception of the cable 21 as shown. If de baskets into the frame, a pivotal support for sired, each of the side frames ll may be con said frame adjacent the top forward edge there 35 of two solid plates in place of the solid of, flexible cables connected with said end mem as structed construction shown with plates being spaced to bers adjacent the lower forward corners thereof, receive the cable between them. channel-shaped‘ arcuate guideways secured at These guides, as illustrated, are formed on an both ends to said end members forming diagonal arc struck from the center of pivotal movement braces for the end members and leading said ca 40 of" the, basket and therefore the leverage ob bles toward the upper rear corners thereof, where 40 tained remains constant while the basket-is being by the frame may be swung about its pivotal sup raised, and the lifting force of the hoist is con port by an upward pull on said cables. ?ned to a straight vertical line at all times. How ever, the necessary vertical movement of the hoist THOMAS F. ALLEN. may be even further reduced by varying the shape 45' and position of the arcuate guides 30.