Method of manufacturing medical instrument and medical instrument

A method of manufacturing a medical instrument, comprising:

• a first step of superposing a pair of openable and closable members one on each other, and inserting a shank of a bolt through holes defined in proximal ends of the openable and closable members, the bolt having a shaft hole defined axially through the bolt;
• a second step of threading a nut on the shank of the bolt;
• a third step of sandwiching the superposed openable and closable members between a head of the bolt and the nut, and while performing a predetermined sliding adjustment process on the superposed openable and closable members, securing the bolt and the nut to each other to produce a structural body in which the openable and closable members are angularly movably supported in a predetermined sliding state;
• a fourth step of inserting the structural body into a connecting tube coupled to a distal end of a shaft extending from an operating unit, and connecting the openable and closable members to a transmitting member for transmitting an input action from the operating unit to the openable and closable members;
• and
• a fifth step of fitting and securing a pin, from an outer surface of the connecting tube, in a hole defined diametrically through the connecting tube and the shaft hole of the bolt, whereby the openable and closable members are angularly movably supported on the shank of the bolt for opening and closing movement about the shank.