Patent ES-301841-A1 (ES)
Title: Apparatus for feeding articles to an endless or closed path conveyor
IPC: H01J5/20
Filed: 1964-07-09
Abstract: An apparatus comprises an endless chain conveyer 59 provided with grippers 55A, 55B for stem mounts 175 of lamp tubes or the like and gripper means 153 for feeding the stems 175 to the conveyer 59 wherein the conveyer moves for at least part of its path along the arc of a circle and the gripper means 153 comprises a plurality of grippers which when moving along the said arc move in synchronism with conveyer 59 moving therealong, the stems 175 being transferred from a position B at the centre of curvature of the arc to a position C in the arcuate path. The device may be used to transfer articles in the reverse direction. The conveyer 59 comprises two parallel chains passing around pairs of chain wheels 61, 63. The grippers 55, 57 (Fig. 2), provided adjacently on the two chains each comprise meshing pinions 81 secured to the gripper arms at their pivots, which are driven by a toothed quadrant 83 to operate the gripper arms. The quadrant is operated through links by a roller 89 engaging a static cam track 75. The grippers 153 (Figs. 2 and 3), are mounted on the side of the chain wheel 61 and are pivotable about an axis 151 from the receiving to the discharge position. A toothed pinion 167 secured to each gripper at the axis 151 is engaged by a toothed rack 162 which is reciprocated parallel to the chain wheel axis to effect movement of the gripper. The rack 162 is attached to a spring-loaded rod 147 which passes through the chain wheels and has a cam roller 169 attached to its remote end which is engaged by a static cam track 168. A reciprocating stud 174 coaxial with the chain wheel temporarily opens the arms 155, 157 of the gripper 153 during the pick-up of a stem mount. These gripper arms each have an engaging toothed pinion 161, 163 at their pivot points. In operation, a stem picked up at position B is pivoted about axis 151 into position C as the chain wheel 61 is rotating in the direction of arrow 100 and a path shown at 102 is traced out by the stem. A gripper 55A, 55B on each of the two chains 59 have their arms in the open position and move in synchronism with the gripper 153, the pinions 161, 163 of which engage a rack in the area D to open the arms after the arms of the grippers 55A, 55B are closed, whereupon the stem is then conveyed by the last said grippers. On the return run of the chain 59, they engage fixed guides 101 which lie adjacent the path taken by a further conveyer. This latter conveyer (Fig. 4) comprises a framework 15 rotatable about a shaft 13 and conveying a plurality of grippers 3 with adjacent burners 111 on each side of the conveyer. Each gripper comprises a fixed jaw 23 and a spring-loaded jaw 27 which is operated through a linkage by a fixed cam track 19 engaging a roller 21 on the linkage. Each burner 111 comprises a tubular housing in which the end of a stem mount can be received, the outer end of the housing incorporating the burner nozzles. The burner slidable on members 121, 123 is movably controlled by a link 129 pivoted to the burner, to the rotating frame 15 and to a block 133 which is movable with a rod 135 controlled by a cam and roller 137, 139. In operation, as the stem mount in the grippers 55A, 55B moves along the area of the guide 101 (Fig. 4), the burner 111, moving in synchronism with said grippers, slides on to the stem and the grippers open so that the stem is carried by the burner. In the area G of the burner carrying conveyer path a lamp tube is fed by shoot 5 and wheel 7, 9 to the pair of grippers in line with the stemcarrying burner. In this embodiment, another stem mount is similarly delivered to a second burner on the other side of the framework 15 so that when the lamp tube is delivered to the grippers, the burners move towards each end of the tube to insert the stems therein and the burners then function to seal with same therein.