To provide a cutting tool which solves the problem that, when the angle of a cuter knife is changed, a tension coil spring is pulled to increase a tension load, thereby the point of the cutter knife is made to cut into backing.
The cutting tool has a mechanism in which a constant load spring is arranged in a case, one end of a wire is attached to the distal end of the constant load spring and the other end is put around a pulley, which is rotatably fixed to the case, and fixed to a wire attachment member arranged in a cutter sheath, to constantly keep the load. A pulley shaft, in which a mobile pulley is pivotally supported, is forcedly moved to a position where a pulley movement hole formed in a body coincides with a pulley movement hole formed in the cutter sheath in response to the turning amount of the cutter sheath, to constantly keep the load on the point of the cutter knife.
YAMAMOTO JUN
IGUCHI YASUHIKO
