| 摘要 |
PROBLEM TO BE SOLVED: To easily attach-detach and position a stopper for fixing an expansion blade, in a blade device having the expansion blade for expanding a width of a main blade.SOLUTION: An expansion blade 11a can rotate with a connection pin 15a as the axis to a main blade 10, and the expansion blade 11a is juxtaposed sideways to the main blade 10, and a state of expanding a width of the main blade 10 and a storage state of positioning the expansion blade 11a in the rear of the main blade 10 are variable, and by being formed in a structure for fitting a stopper 25a in a groove respectively formed in an upper part of an installation plate 12a of a main blade back face and an installation plate 13a of an expansion blade back face in the expansion state and the storage state, rotation of the expansion blade 11a can be easily regulated, and the stopper 25a is easily attached-detached and positioned. |
