| 摘要 |
<p>1471010 Seaming non-metallic sheet material M MIKAMI 16 July 1974 31390/74 Heading B5K A rotary welder comprises a verticallymovable fusion-welding bar 13, Fig. 5, and a plurality of fusion welding beds 4 spaced about the periphery of a rotatable drum 1, Figs. 1 and 4, and having bed plates locked on the opposite ends of the drum 1 by plates 6 so as to be adjustable about the periphery of the drum 1. As shown, the drum 1 is mounted on a shaft 2 and has a circular T-section groove 3, Fig. 4, cut on each end thereof to receive T-bolts and nuts 7 to retain the plates 6. The bar 13 is mounted on a block G, Fig. 1, movable vertically by a cylinder H. The bed plate of each bed 4 has a contact member 14 to contact a limit switch 15 as the drum 1 rotates. In operation, to weld strips Q, Figs. 3 and 5 (the former not shown), of holding cloth to a motor-vehicle head-lining cloth P to form pockets for receiving listing rods, the strips Q are each located in a bed 4 and clamped by plates 5, Fig. 5, and the desired number of beds 4 are spaced about the drum 1. Rotation of the drum 1 commences and when the switch 15, Fig. 1, is contacted by a member 14, a clutch K is disengaged and bars 10 are projected by air cylinders 11 to be received in openings 8, Fig. 4, in the plates 6 to stop the drum 1 at a predetermined position. The block G is lowered and guide bars 12 thereon are received in openings 9 of the bed plate of the bed 4. Welding is effected by high frequency current applied for a predetermined period using the bar 13 and a bed 4 as electrodes. After cooling for a predetermined time set by a timer, the block G is raised so that the clutch K is engaged to rotate the drum 1 to position the next bed 4 for welding.</p> |
