| 摘要 |
A clamping device for hubs for winding magnetic tapes consists of a rotatably mounted block (1) mounted on a circular disc (2), the external circumference of which block is adapted to the internal bore of the winding core (6), said block containing, as clamping elements, two bushings (5,5') situated opposite each other, each of which bushings has two balls (9,9') which bear on the outside against the collar of the respective bushing (5,5') and on the inside against each other by way of a spring (10), the clamping elements being situated at some distance from the circular disc (2) so that the reel hub (6) mounted in position bears against the portion of the ball projecting from the collar of the bushing (5,5') and the bent over edge of the reel hub (6) is pressed by this spherical portion against the abutment (11) formed by the outer circumference of the circular disc (2).
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