Patent GB-1112930-A (GB)
Title: Palletizer
IPC: B65G57/00
Filed: 1966-12-16
Abstract: 1,112,930. Palletizing-machine. GEO. J. MEYER MANUFACTURING CO. 16 Dec., 1966 [28 Feb., 1966], No. 56438/66. Headings B8A and B8C] A machine for loading pallets with cases &c., receives a layer of cases 15 on support means 28, means 29 carried by a transfer plate move the layer on to a transfer plate such as 8 or 9 which moves in a closed path, a stop-bar 58 strips the cases from the withdrawing plate to position them on a pallet 5. During continuing movement of the transfer plate a pallet may be removed from a stack and positioned under the plate to be subsequently deposited to receive a stack of cases. As described, cases 15 are delivered to the machine on a conveyer 14. When four cases have been received, actuating corresponding limit switches (not shown), a fifth case trips a further control switch (22), Fig. 1 (not shown), which causes a plunger (24) to press the case against a guide (25) to terminate the case input feed. Simultaneously a stop bar (17) at the terminal end of the conveyer is moved to allow the four cases to move a short distance downstream. A push-bar 27 now impels the four cases on to support fork tines 28. A second group of cases is similarly impelled to cause the first group to strike a limit switch (100) which maintains, or starts, movement of the transfer plates 8, 9 in their path. Fingers 29 on a transfer plate slide the cases along the tines and on to the plate, which continues through 180 degrees of its orbital path to stack them on a pallet 5 or other cases already on a pallet, the latter being supported by a bar 13 of chain conveyers 11, 12 which lower the stack to receive each layer and to deliver the palletized cases to a discharge conveyer 16. Further actuation of the limit switch (100) ensures a further 180 degrees of orbital movement of the transfer plate to pass over a pallet stack held on bars 6, 7 of chain conveyers 3, 4. Clamping means, Figs. 7, 8 and 9 (not shown), are mounted on depending flanges 47 on opposite sides of and on the underside of the transfer plate and comprise a pair of bars 46 adapted to grip the pallets. The bars are impelled towards each other by piston- and-cylinder 48 means forcing a roller (50) between conveying cam surfaces (51), (52) on each flange and bar, and actuated to lift a pallet when one is required to be subsequently deposited on the chain conveyers 11, 12. As shown in Fig. 10, the transfer plates 8, 9 are carried by a chain conveyer 10 which rides on a guide 31 and under a guide 32. The plates are guided by means of rollers (35) which engage guide tracks (35a), during horizontal movement, Fig. 8 (not shown). To maintain the transfer plates horizontal during the vertical parts of their paths, stabilizer means are provided, Fig. 3, see also Figs. 4, 5 (not shown), comprising arms 36-39 mounted on the machine frame and joined in pairs at their lower ends for parallel motion, the lower ends bearing rollers (43) to support the plates during the curved portions of their paths by engaging beneath flanges (45) projecting from opposite sides of the plates. The plates "pick-up" " and " drop " the stabilizers as they leave and enter their horizontal paths respectively. Fig. 10 also shows means supplying power to a pressure cylinder 48 of the clamping means 46. Compressed air flows in through a conduit 71 to a reel 73 on which is coiled a retractable flexible hosepipe 74 which moves around the machine with a transfer plate to deliver air to a rotary joint 75 and hence to the cylinder 48. Photo-cell control means may replace the limit switches at the input conveyer. Resiliently mounted guide means (59), Fig. 1, abut on any cases 15 that might tend to move laterally off a vertically aligned position on the stack.