Drive mechanism of injection molding machine

A drive mechanism of an injection molding machine comprising:

• a movable plate capable of advancing and retreating along a guide member;
• a rear plate provided in such a manner that it faces the movable plate;
• a ball screw including a ball screw nut and a ball screw shaft;
• a driving motor for driving the ball screw shaft through a coupling member;
• and
• a motor fixing member to which the driving motor is fixed, wherein the ball screw nut is fixed to the movable plate,
• the ball screw shaft is rotatably supported by the rear plate so as not to be movable in an axial direction, and
• the motor fixing member is disposed such that a relative position thereof with respect to the rear plate is adjustable, and wherein
• the drive mechanism of an injection molding machine further includes a position adjustment part capable of adjusting the relative position between the rear plate and the motor fixing member, and wherein
• the position adjustment part includes:
• at least one screw hole that penetrates the motor fixing member or an extension member extending from the motor fixing member, and has a thread;
• a bolt threadedly engaged with the thread of the screw hole;
• and
• an abutting part that abuts on the bolt.