Punch holder apparatus

摘要

A punch holder apparatus includes: a punch holder (7) formed with a punch mounting hole (9) and with an inspection hole (35, 53) in a direction perpendicular to a longitudinal direction of the punch holder (7); an engagement piece (37) to be mounted in the inspection hole (53, 35); a lock piece (45) formed with a receiving allowable concave section (41) to receive the engagement piece (37); and pressurizing means (39) for pressurizing the lock piece (45) so that an engagement piece pushing-out holding section (43) provided to the lock piece (45) is normally located in a position corresponding to the engagement piece (37). In the above construction, the lock piece (45) is provided so as to be capable of moving in a direction parallel to the longitudinal direction of the punch holder (7). Furthermore, the receiving allowable concave section (41) receives the engagement piece (37) which is moved in the direction perpendicular to the longitudinal direction of the punch holder (7).