Patent ID: 8256407

Claim:
A multi-wire saw in which a wire is wound along wire guide grooves formed at a predetermined pitch on surfaces of a plurality of wire guide rollers having rotation axes parallel to one another in a horizontal plane, the wire reciprocates for a plurality of times between the wire guide rollers that are in outermost positions, and a material to be machined is cut while being fed downwardly against the wire traveling in parallel as a plurality of lines on an upper side of the wire guide rollers, the multi-wire saw comprising: a slurry supplying unit that is disposed behind the material to be machined with respect to a traveling direction of the wire, and supplies slurry to the wire traveling in parallel as the lines on the upper side; and a wire-lifting restraining member that is a cylindrical body of rotation, and at a start of machining of the material to be machined, so disposed as to come into contact with all the lines of the wire traveling in parallel as the lines on the upper side, near the wire guide rollers and behind the slurry supplying unit with respect to the traveling direction of the wire.