Patent ID: 7313868
Filing Date: 2008-01-01
Classification: B23D

Abstract:
1. A cutoff tool comprising a cutting blade having a toothed portion for cutting an object; a reciprocating drive mechanism for reciprocating the cutting blade in a uniaxial direction while a proximal end portion on one end of the cutting blade is held; and a hook whose distal end portion is formed into a hook claw shape, wherein in a plan view in the direction perpendicular to a plane including the cutting blade and the hook, the hook is arranged so as to overlap with a distal end portion on the other end of the cutting blade, and the hook claw shaped distal end portion of the hook is arranged so as to protrude from the toothed portion of the cutting blade, in a state in which the cutting blade retracts farthest in a uniaxial direction, the distal end portion of the cutting blade in the uniaxial direction, which is a direction in which the cutting blade reciprocates, is arranged at a position so as to overlap with the hook in the plan view, by which an angle formed by the toothed portion of the cutting blade and the distal end portion of the hook is an acute angle so that a space for holding or pulling out an object to be cut is always formed between the toothed portion of the cutting blade and the distal end portion of the hook, and in a state in which the cutting blade advances farthest in a uniaxial direction, the distal end portion of the cutting blade is arranged so as not to protrude from the hook to the outside.