| 摘要 |
<p>PURPOSE:To prevent concentrated discharge of exhaust gas by mounting a member on the tip part of an exhaust pipe coupled to an engine and converting a jet of exhaust gas into a swirl. CONSTITUTION:An exhaust pipe 12 having an exhaust port for exhaust gas formed in such a state to protrude from the rear surface part of a counter weight 6 is provided at its interior with a function to convert a jet of exhaust gas into a swirl flow. The exhaust gas pipe 12 has an rear end part in the inner peripheral surface part of which a spiral recessed groove is formed. A rotation force is exerted on exhaust gas discharged from an engine 7 when the exhaust gas passages through the spiral recessed groove and the exhaust gas is discharged through the tip part thereof as it is revolved. In this case, since discharged gas is revolved, the gas is radially spread and dispersed by a centrifugal force. Thus, since exhaust gas is prevented from being concentratedly discharged, there is no need for an operator to pay attention to the periphery of a site and operation is practicable without anxiety.</p> |
