Patent ID: 9662799
Date: 2017-05-30
CPC Classifications: B23D,B26D,Y10T

Claim:
1. A band saw comprising: a driving wheel and a driven wheel rotatably provided at a saw housing; an endless saw band that runs around the driving wheel and the driven wheel; and a plurality of saw band guiding devices for directing and guiding cutting edges of the saw band toward a direction of a workpiece to be cut, wherein the saw band guiding devices are movable in directions such that one of the guiding devices moves toward and away from another of the guiding devices, wherein each of the saw band guiding devices comprises a vibrator including a rotating actuator, a cam coupled with and rotated by the rotating actuator, a cam follower in contact with the cam to undergo motion, and a pressure rod coupled with the cam follower and that vibrates the saw band in a cutting direction relative to the workpiece, wherein a pressure member holder comprising a plurality of pressure rollers that press a back surface of the saw band, is provided in each of the saw band guiding devices and is pivoted about a position between two of the plurality of pressure rollers, wherein the pressure member holder is provided to be rockably pivoted on a substantially central portion of a rocking arm coupled with and driven by the pressure rod so as to be capable of rocking in directions towards and away from the back surface of the saw band at each of the saw band guiding devices, and wherein the plurality of rollers are in a free floating state in accordance with an edge of the saw blade.