Silk thread clamping, positioning and tensioning device for synchronous rotary table

The utility model discloses a silk thread clamping, positioning and tensioning device for a synchronous rotary table, which is characterized by comprising two rotary tables arranged oppositely, the rotary table for fixing the beginning and tail ends of the silk thread is an open side rotary table, and the rotary table for fixing the middle part of the silk thread is a closed side rotary table; the opening side rotary table comprises a bottom plate, a translation plate is arranged on the bottom plate, two stand columns are transversely arranged on the translation plate and used for fixing a pay-off structure with two wire grooves, and the first wire groove is consistent with the rotating center of the rotary table. A square plate is further arranged on the translation plate, one end of the square plate is vertically and fixedly connected with the translation plate, and a tensioning fixing block is arranged at the other end of the square plate; a hole is formed in the center of the square plate, the first coaxi