Patent ID: 8585876

Claim:
A sealing mechanism of a cylinder block plate processing apparatus which includes the sealing mechanism that seals one end side of a cylinder inner peripheral surface of a cylinder of a cylinder block and in which a process liquid is guided to the cylinder inner peripheral surface to perform pre-plating processing or plating processing of the cylinder inner peripheral surface, the sealing mechanism comprising: a sealing jig including a sealing member; and a driving mechanism that drives the sealing member, wherein the sealing jig is placed separately from the driving mechanism and at a front end portion of an electrode provided in the plate processing apparatus, the electrode and the sealing jig are inserted from an end side of the cylinder inner peripheral surface into the cylinder, and the driving mechanism is inserted from another end side so as to be connectable to the sealing jig, wherein the sealing jig includes the sealing member, a sealing plate that engages the sealing member, and a sealing base that engages the sealing member and the sealing plate, wherein the sealing member, the sealing plate, and the sealing base are integrally engaged so as to form a main air channel inside, and wherein the sealing member is further provided with a sub-air channel and a corresponding outlet to be closed by the sealing member.