Adjustment mechanism for adjusting depth at which pneumatic nailing machine drives nails into workpiece
First Claim
1. A pneumatic nailing machine for driving a nail into a workpiece, the pneumatic nailing machine comprising:
- a main body;
a nose provided to the main body, the nail being protrudable from the nose;
a trigger pivotally supported to the main body for starting a nail driving operation;
a push lever vertically movably supported to the main body, the push lever having a lower tip portion positioned near the nose and an upper tip portion positioned near the trigger, the push lever being divided into an upper section having a lowermost end and a lower section having an uppermost end;
a drive bit supported in the main body and movable in an axial direction thereof, the drive bit being moved along the nose upon manipulation of the trigger; and
a nail driving depth adjusting mechanism for controlling a distance between a lower tip end of the nose and a lower tip end of the push lever when the push lever is pressed against the workpiece, the nail driving depth adjusting mechanism comprising;
a shaft portion rotatable about its axis, the shaft portion being positioned adjacent the trigger;
a knob portion connected to the shaft portion for rotating the shaft portion about its axis;
a first cam lobe provided to the shaft portion and having a first cam surface engageable with the lowermost end of the upper section; and
a second cam lobe provided to the shaft portion and having a second cam surface engageable with the uppermost end of the lower section, contour of the first and second cam surfaces being arranged to simultaneously move the lowermost end and the uppermost end away from each other in accordance with a rotation of the knob in one direction and to simultaneously move the lowermost end and the uppermost end toward each other in accordance with the rotation of the knob in an opposite direction.
1 Assignment
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Accused Products
Abstract
A pneumatic nailing machine having a driving depth adjusting mechanism disposed near a trigger. A push lever is vertically movably supported around a nose portion and extends near the trigger. The push lever is divided into an upper section and a lower section, the dividing portion being near the trigger. A cam shaft having first and second cam lobes are rotatably provided near the trigger. A lowermost end of the upper section is in slide contact with the first cam lobe, and an uppermost end of the lower section is in slide contact with the second cam lobe. The cam shaft together with the cam lobes, and the upper and lower sections are concurrently movably supported by a guide plate supported by a main body. By rotating the cam shaft in one direction, a distance between the lowermost and uppermost ends is increased to expand entire length of the push lever.
146 Citations
15 Claims
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1. A pneumatic nailing machine for driving a nail into a workpiece, the pneumatic nailing machine comprising:
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a main body; a nose provided to the main body, the nail being protrudable from the nose; a trigger pivotally supported to the main body for starting a nail driving operation; a push lever vertically movably supported to the main body, the push lever having a lower tip portion positioned near the nose and an upper tip portion positioned near the trigger, the push lever being divided into an upper section having a lowermost end and a lower section having an uppermost end; a drive bit supported in the main body and movable in an axial direction thereof, the drive bit being moved along the nose upon manipulation of the trigger; and a nail driving depth adjusting mechanism for controlling a distance between a lower tip end of the nose and a lower tip end of the push lever when the push lever is pressed against the workpiece, the nail driving depth adjusting mechanism comprising; a shaft portion rotatable about its axis, the shaft portion being positioned adjacent the trigger; a knob portion connected to the shaft portion for rotating the shaft portion about its axis; a first cam lobe provided to the shaft portion and having a first cam surface engageable with the lowermost end of the upper section; and a second cam lobe provided to the shaft portion and having a second cam surface engageable with the uppermost end of the lower section, contour of the first and second cam surfaces being arranged to simultaneously move the lowermost end and the uppermost end away from each other in accordance with a rotation of the knob in one direction and to simultaneously move the lowermost end and the uppermost end toward each other in accordance with the rotation of the knob in an opposite direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification