Patent GB-1051126-A (GB)
IPC: B65G47/61
Abstract: 1,051,126. Endless conveyers. MECHANICAL HANDLING SYSTEMS Inc. Jan. 30, 1964 [Jan. 31. 1963], No. 3940/64. Heading B8A. A dumping conveyer system comprises a carrier 20 having a support 21 thereon movable from a load supporting to a load dumping position, means for guiding the carrier in a predetermined path and a cam track assembly 50 located at spaced points along the path to operate an actuator 58, 61 on the carrier 20 whereby the support 21 is moved from the load supporting to the load dumping position. Each carrier 20 comprises a rectangular frame transversely stabilized at top and bottom by rollers running about vertical axes in guide tracks 32, 34 and is suspended from a pair of trolleys 26 which form part of an endless conveyer chain 27. Spaced arms at the tops of the trolleys 26 support rollers 29 which roll on the flanges of an I-beam track 30. The support 21 pivoted about a horizontal longitudinal axis, between the end walls of the carrier 20, has end walls 43 and a V- shaped base 42. Its position is controlled by a rod 56 ball jointed at 57 to the support 21 and at 59 to an arm 58 of the actuator 58, 61 which is pivoted to the frame 20 and is spring loaded into the load supporting position. At a dumping station along the conveyer path, a roller 62 on the end of the actuation arm 61 passes into a cam track formed by rails 66, 67 causing the actuator to rotate, thus lifting the rod 56 and tilting the support 21 into a dumping attitude whence the load passes into a shoot c. The cam assembly 50 comprises the two parallel rails 66, 67 having an upwardly bent first portion 68, a horizontal centre portion 69 and a downwardly bent rear portion 70. A pivoted cam tongue 71 at the front end of the lower rail 67 is adapted to be swung downwardly into a position where it will guide the roller 62 between the rails 66, 67 for dumping or upwardly into a position where the roller 62 will clear the tongue so that no dumping movement of the tray is effected. The tongue 71 is lowered by a signal pin 75, Fig. 4 (not shown), adjustably mounted on the front of the carrier 20 engaging a roller on the lower end of a pivoted lever 72 which then disengages a pin on the tongue 71 causing the latter to lower under the action of a spring-loaded rod 80. A roller 89 is also mounted on the front of the carrier 20 to engage a shoe 88a of a rod 88 which operates a lever 83 causing the rod 80 to raise the tongue 71 into the closed position prior to the signal pin engaging the lever 72. Several signal pins 75 may be mounted transversely out from the carrier 20 so that operation at a particular dumping station may be effected by setting the appropriate pin. The carriers 20 may be conveyed in groups whereby only the leading carrier has the signal pins and tongue closing roller on each carrier may travel and control its dumping independently. In a further embodiment, Fig. 7 (not shown), the support 21 comprises a flat tray formed by rollers and bars, which is tilted in one direction for conveying whereby the load rests against a side stop bar and tilted the other way at a dumping station. The transverse stabilizing rollers at the top of each carrier 20 may be a single roller intermediate the two trolleys 26 or there may be one roller in line vertically with each trolley, Figs. 13, 14 (not shown).