| 摘要 |
A rigid base (3) defines an axis (X). An abutment (4) forms a resting surface (5) for one end of the long component (2) and a retainer (6). These components (4, 6) are axially separated by a detachable support block with a through passage (8) for sliding adjustment and housing of part of the long component (2). It can be positioned and held between the retainer and the abutment, making surface contact against the abutment. An axially-guided moving component (9) has a second component (10) contacting the other end of the long component (2). The moving component (9) is articulated with two links (11, 11'). These rotate on eccentrics (12, 12'), which pivot on the base (3). They are assembled rigidly with a pivoting cover (13). This swings down over the assembly (4, 6, 9) and the components (5, 7, 10), corresponding with the locked state of the long component. The two eccentric assemblies (12, 12') and links (11, 11') transform the pivoting movement of the cover (13) into translation of the moving component (9).
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