| 摘要 |
A blind riveter comprises chuck jaws for clamping a tension shaft of a blind rivet and a longitudinally movable tension chuck for moving the chuck jaws radially relative to the tension shaft for clamping and releasing the tension shaft as the tension shaft longitudinally moves in relation to the chuck jaws back and forth from a charging position into a tension position. As the tension shaft longitudinally moves, the chuck jaws and a clamped tension shaft are carried along until reaching a tear off position of the tension shaft. A step face is pressed against the chuck jaws by a loaded spring for pressing the chuck jaws into the charging position. A loaded return spring presses the tension chuck into the charging position. Means for moving the tension chuck against the force of the return spring is provided. The charging position of the tension chuck can be shifted with an adjustable abutment for the return spring, where the position of the abutment is adjusted to vary the load of the return spring. Alternatively the charging position of the tension chuck is shifted by means of a stop face for a shoulder of the chuck jaws, where the stop face is mountable in at least two longitudinally spaced apart positions in the casing of the blind riveter.
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