Safety apparatus for a vertical injection molding machine

Abstract

A safety apparatus for a vertical injection molding machine. The safety apparatus includes an abnormality detection section for detecting an abnormal condition of a transmission belt, and a stopper mechanism including an engagement rod having a plurality of engagement portions along a moving direction of a movable mold and an engagement member adapted to engage the engagement portion when moved to an engagement position. The engagement rod is provided on one of a side where the movable mold is attached and a side where a stationary mold is attached. The stopper mechanism further comprises a drive control section adapted to move the engagement member to the engagement position for engagement with the engagement portion, when an abnormal condition of the transmission belt is detected by the abnormality detection section. When the abnormality detection section detects an abnormal condition of the transmission belt, the drive control section moves the engagement member to the engagement portion, so that the engagement member comes into contact with the engagement rod. As a result, when the movable mold and associated members are about to fall, a closest engagement portion engages the engagement member, thereby preventing falling of the movable mold and associated members.

Dependencies are inferred from the claim text.