| 摘要 |
The invention provides a pneumatic punching-in tool for driving in a punching-in member, capable for suppressing wind noise of exhausted compression air when the compression air as drive source is opened to atmosphere. When a punching-in operation of a punching-in actuator (35), compression air in an upper piston chamber (52) flows to a lower piston chamber, so that a piston (33) including the punching-in actuator (35) is reset to an initial position before punching-in operation. Exhaust channel at a side exhausting structure communicates with an exhaust channel for a trigger valve exhausting structure (74) which allows the force application air of a trigger valve (73) for opening and closing of an advancing head valve (41) to be exhausted to the outside of a tool body (15) through a communication channel (424), so that air not needed can be exhausted to the outside of a tool body (15) from the trigger valve exhausting structure (74). In addition, the trigger valve exhausting structure (74) is provided with a pressure releasing chamber (75) capable of expanding before air flowing in the trigger valve exhausting structure (74) is exhausted outside the tool body (15). |
