초록 ▼

A screw driving machine in which a screw having a head is screwed into a work, includes: a body; a nose section positioned toward the work with respect to the body, the nose section holding the screw to be driven; a hammering mechanism accommodated in the body, for hammering the screw into the work

A screw driving machine in which a screw having a head is screwed into a work, includes: a body; a nose section positioned toward the work with respect to the body, the nose section holding the screw to be driven; a hammering mechanism accommodated in the body, for hammering the screw into the work until the head of the screw held above the work; a screwing mechanism for screwing the screw hammered into the work; a contact arm slidable with respect to the nose section, the contact arm being pulled in toward the body when the contact arm is pushed against the work; and a locking mechanism for prohibiting the contact arm from sliding in its half way when the contact arm is pushed against the work, and for releasing the contact arm from locking after the hammering mechanism hammers the screw into the work.

대표청구항 ▼

[ What is claimed is:] [6.] A locking mechanism for a screw driving machine, the screw driving machine having a slidable contact arm for positioning the screw driving machine relative to a workpiece and an air cylinder device for feeding a screw to be driven, the screw driving machine being capable

[ What is claimed is:] [6.] A locking mechanism for a screw driving machine, the screw driving machine having a slidable contact arm for positioning the screw driving machine relative to a workpiece and an air cylinder device for feeding a screw to be driven, the screw driving machine being capable of hammering the screw partially into the workpiece by compressed air, the locking mechanism comprising:an engaging edge formed on the contact arm; anda stopper piece operatively associated with the air cylinder device, the stopper piece being movable between a first position where the stopper piece engages with the engaging edge formed on the contact arm and prevents the contact arm from sliding past a predetermined position and a second position where the stopper piece does not interfere with the sliding of the contact arm, wherein the air cylinder device normally positions the stopper piece at the first position and moves the stopper piece to the second position at the same time that the compressed air for hammering the screw is discharged.