| 摘要 |
<p>A rigid member is configured to move a valve member to separate the valve member from an engaging part when a push lever moves from a lower dead center to an upper dead center. A resilient member is configured to move the valve member to separate the valve member from the engaging part when the push lever moves from the lower dead center to the upper dead center. A switching part selects one of the rigid member and the resilient member to move the valve member to separate the valve member from the engaging part. When the switching part selects the rigid member, a fastener driving operation is performed regardless of an order of a pulling operation and a pressing operation. When the switching part selects the resilient member, the fastener driving operation is performed only when the pulling operation is executed after the pressing operation is executed.</p> |
