| 摘要 |
The present invention finds application in the art of stone-working and relates to a device for tensioning flexible annular members wound around pulleys, which comprises a central hub (2) with a first substantially stationary axis (L), a substantially toroidal flange (4) with a central hole (5) for the passage of said hub (2), a pulley (6) rotatably mounted to said flange (4) to rotate about a second axis (X), said pulley (6) having a peripheral groove (7) for receiving said flexible member (F), drive means (9) operating on said pulley (6) in a substantially radial direction (R) to translate said second axis (X) relative to said first axis (L). The drive means (9) are external to said hub (2) and are operably coupled to said flange (4) to translate it perpendicular to said first (L) and second (X) axes.
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