| 摘要 |
1,013,503. Connecting plastic pipes. GEORG FISCHER A.G. Oct. 23, 1963 [Oct. 23, 1962 (2)], No. 41910/63. Heading F2G. To interconnect them the end faces of tubular members 1, 2 of thermoplastic material are pressed against the end-faces of an interposed annular thermoplastic member 11 which is rotated to create sufficient frictional heat between the engaged end-faces to melt and fuse the same together. The member 11 has peripheral teeth 14 which mesh with the teeth of a gear 22 on the interconnecting device. The end faces of the members 1, 2 and 11 may be flat as in Fig. 6, or conical, or the member 11 may have guiding lips 33, 34 of slightly smaller diameter than the inside of the pipe and either continuous or spaced intermittently around the circumference. The interconnecting device includes a non-driver counter-gear which engages the member 11 and co-operates with the driven gear 22 to centre it when the latter gear is rotated in a direction as at 59 in Fig. 2. The gears 22 and 24 mesh with the teeth 14 of the member 11 at positions 120 degrees angularly apart (as at 21) and the device allows the distances between their centres to be varied to suit tubular members of various sizes as at 62, 63. A clutch-type slipping brake may be incorporated in the gear 24, as shown in Fig. 6. Fig. 3 shows an alternative type of interconnecting device which may have an additional counter-gear 38. In place of the countergears rollers 45, 46 and/or stationary centring members 61, 62 on the outer members 1, 2 may be used. Fig. 9 shows a tool 103 for pressing the ends of the members 1 and 2 on to the member 11. It also shows an interposed member 93 with alternate teeth 95 which are longer than the normal teeth 14a and overlap the members 1 and 2 to centre the interposed member between them.
|
