| 摘要 |
The invention relates to the screwing of fixing elements, comprising a tubular shaft, provided with a flange and a screw pre-engaged in the shaft, a magazine (M) with two parallel lateral guides (34, 35), separated one from the other by a distance marginally greater than the diameter of a shaft but less than the diameter of a flange, a distributor (D) into which the lower end of the magazine (M) opens and a screwing shaft (PV) located in the axis of the screwing bar (31) of a mobile screwing /unscrewing device (21) and displaceable parallel to the axis of the bar (31). |
