Patent ID: 9676115
Date: 2017-06-13
CPC Classifications: B27B

Claim:
1. A guide bar fastening device for a chain saw, comprising: a chain cover that covers a part of a chain saw body of the chain saw; a bolt member that is secured to the chain saw body and configured to penetrate through an end portion of a guide bar and the chain cover; a circular rotatable nut member provided on the chain cover and configured to fasten the guide bar between the chain saw body and the chain cover by rotating a central screw portion of the nut member on a screw portion of the bolt member, the screw portion protruding toward an outside of the chain cover; and an operation lever that includes: when the operation lever is in the shortened state, the operation lever is swingingly disposed in a receiving portion of the nut member formed along the diametral direction of the nut member, and when the operation lever is swung out of the receiving portion and the operation lever is lengthened outward to the lengthened state, the operation lever is configured to rotate the nut member via a rotation force acting on an outer end portion of the second lever.