The invention relates to a wedge-block-type unwinding shaft used in a
production line of disposable hygienic products. In the invention, a fixed shaft is a stepped shaft, a small-
diameter section of the fixed shaft is sequentially sheathed with two guide sleeves, a spacer bush and a compression spring, and an end part of the small-
diameter section of the fixed shaft is in threaded connection witha hand wheel; one end of the compression spring is positioned in a circular groove of the hand wheel, and the other end of the compression spring is in contact with an end face of the spacer bush; locking sleeves are sheathed on small-
diameter sections of the two guide sleeves, sleeves are sheathed outside the locking sleeves, four axial expansion pin grooves are uniformly distributed on each sleeve, and each expansion pin groove is internally equipped with an expansion pin; each expansion pin is in the shape of a wedge block, and an
oblique plane of each expansion pin corresponds to each locking sleeve; and a taper sleeve is inserted between the locking sleeve and the sleeve which are positioned at one end adjacent to the spacer bush, a
conical tube is arranged at one side of the taper sleeve, a
cylindrical tube is arranged at the other side of the taper sleeve, and the
conical surface of the
conical tube of the taper sleeve is in contact with the oblique planes of the four expansionpins in a fit manner. The wedge-block-type unwinding shaft has the advantages of compact and delicate structure and reasonable design, and is convenient in use; unwinding resistance can be controlledby adjusting the hand wheel; and material coils can be fixed, assembled and disassembled quickly through the expansion pins.