Abstract text

It, as shown in FIG. 11, is provided with a feed roller 31 that is movable, rotates the spiral coil 11 passing through punched holes 3a of the bundle of paper-sheets 3, and guides the spiral coil 11 to feed it toward a coil advance direction, a screw guide 49 at a movable and adjustable side that guides and conducts a forward end of the spiral coil 11 fed by the feed roller 31 toward the coil advance direction into the punched holes 3a thereof, and a control part that receives diameter-of-coil-setting information for setting a diameter of a coil of the spiral coil 11 and controls positions of the feed roller 31 and the screw guide 49 based on the diameter-of-coil-setting information. Such a configuration enables the feed roller 31 and the screw guide 49 to move to the guided positions of the spiral coil 11 indicated by the diameter-of-coil-setting information. Accordingly, it is possible to pass the spiral coils having the different diameters thereof through the holes of the bundle of paper-sheets stably.