Patent ID: 6732612
Filing Date: 2004-05-11
Classification: B25B,B27B,B28D,Y10T

Abstract:
A method for exchanging a blade, wherein the blade is mounted on a spindle and is fastened to the spindle by fastening a nut to the spindle, the method comprising the steps of:manually mounting the blade on the spindle without the nut; holding the nut in an unfastened condition by engaging portions of a chuck with a fitting portion formed on the nut, the chuck being provided to a body of an exchanging device and said portions of the chuck being shaped to hold the nut to prevent the nut from falling off the body of the exchanging device irrespective of whether the nut is on the spindle; pressing the nut, which has a plurality of depression holes in a surface which will engage the body, against the spindle with the body of the exchanging device, by engaging a plurality of projection pins on a surface of body with the depression holes of the nut; inserting a wrench through a hole of the chuck so as to engage a head of the wrench with a hole formed in a head of the spindle; and fastening the nut to the spindle by preventing one of the spindle and the nut from rotating while rotating the other of the spindle and the nut with the wrench and the cylindrical body.