| 摘要 |
<p>PCT No. PCT/SE89/00106 Sec. 371 Date Sep. 6, 1990 Sec. 102(e) Date Sep. 6, 1990 PCT Filed Mar. 7, 1989 PCT Pub. No. WO89/09102 PCT Pub. Date Oct. 5, 1989.Apparatus for bending a margin flange (5), which projects at an angle to a surface on a workpiece (2), against the workpiece. The apparatus includes a bending tool (6) which is mounted on a tool holder (14) carried by a parallelogram mechanism (7-12) for movement in relation to a stand (1) on which the workpiece (2) is placed. A drive arrangement (17) is drivingly connected to the tool holder (14) by a linkage (21-27). The tool holder (14) includes a main part (13) connected to the parallelogram mechanism (7-12) and a movable part (15) which is pivotal about a journal pin (16) on the main part. The journal pin (16) is substantially parallel with the axes (7, 8, 11, 12) of the parallelogram mechanism. The movable part (15) carries the tool (6) and by a resilient element (32) is urged towards a starting position with a nose of the tool (6) biased away from the workpiece (2). The linkage (21-27) includes a projection (28) for co-action with an abutment (29) on the movable part (15) of the tool holder (14) in one position of the linkage (21-27) to cause the movable part (15) of the tool holder (14) to move away from the starting position, the main part (13) of the tool holder (14) thereby being located in the vicinity of an end position in which the tool (6) is in engagement with the margin flange (5) on the workpiece (2).</p> |
