초록 ▼

To facilitate maintenance, a pneumatic punching machine of this invention includes a poppet portion 44 at the top of a piston 28 of an air cylinder 23 and a piston catch 43 is disposed inside a head cap 24. The piston 28 is fixed as the poppet portion 44 fits into the piston catch 43 under a standby

To facilitate maintenance, a pneumatic punching machine of this invention includes a poppet portion 44 at the top of a piston 28 of an air cylinder 23 and a piston catch 43 is disposed inside a head cap 24. The piston 28 is fixed as the poppet portion 44 fits into the piston catch 43 under a standby state. A retaining ring 40 is fitted into the head cap 24 to prevent fall-off of a head valve 39. A circumferential groove 41 is formed on the inner peripheral surface of the front part of the head cap 24 and a ring-like seal 42 is fitted into the groove 41. When a driver bit 29 is exchanged, fitting bolts are removed and a housing 22 and the head cap 24 are separated. Then, the head cap 24, the head valve 39, the seal 42, the piston 28 and the driver bit 29 can be removed integrally from the housing 22.

대표청구항 ▼

[ What is claimed:] [1.] A pneumatic screw punching machine comprising:a housing;an air cylinder accommodated inside said housing;a ring-shaped seal;a head cap containing said ring-shaped seal fitted to an open portion of said housing on a side of a cylinder head;a slidable head valve fitted into sa

[ What is claimed:] [1.] A pneumatic screw punching machine comprising:a housing;an air cylinder accommodated inside said housing;a ring-shaped seal;a head cap containing said ring-shaped seal fitted to an open portion of said housing on a side of a cylinder head;a slidable head valve fitted into said head cap controlling operation of said air cylinder;a piston within said air cylinder:a poppet portion formed at the top of said piston of said air cylinder;a piston catch opposing said poppet portion of said piston disposed inside said head cap so that said poppet portion of said piston and said piston catch can fit and separate relative to each other;a retaining ring preventing said slidable head valve from falling off fitted to said head cap; andan engagement portion for holding said ring type seal formed at an edge portion of a seal contact surface of said head cap, and said ring-shaped seal is fitted to said seal contact surface through said engagement portion,whereby when said head cap is separated from said housing, said head valve, said ring-shaped seal, said piston, and a driver bit can be removed integrally with said head cap from said housing.