The aim of the invention is to secure several spindles (4) from being unintentionally pulled out of the bearing housings (3) thereof while preventing accidental contact with the running tangential belt (6) on single-component ring spinning frames. Said aim is achieved with the aid of an elbow (9) that is provided with a horizontal leg (10) and a vertical leg (11). The vertical leg (11) of said elbow (9) encompasses recesses (12) which are penetrated by the spindles and extend all the way to the horizontal leg. The recesses that extend to the horizontal leg protrude into peripheral grooves (14)of the spindles and secure the same against being unintentionally pulled off. The flaps (13) of the vertical leg which extend between the recesses are located in front of the tangential belt and prevent the same from being accidentally touched.