Patent ID: 6164947
Filing Date: 2000-12-26
Classification: B29C

Abstract:
A safety apparatus for a vertical injection molding machine equipped with a clamping apparatus which vertically moves a movable mold by use of a drive unit that includes a rotation transmission mechanism having a transmission belt, said safety apparatus comprising:an abnormality detection section for detecting an abnormal condition of said transmission belt;a stopper mechanism including an engagement rod having a plurality of engagement portions oriented essentially along a moving direction of said movable mold and an engagement member adapted to engage one of said engagement portions when moved to an engagement position, said engagement rod being provided on one of a side where said movable mold is mounted and a side where said stationary mold is mounted, and said engagement member being provided on the other of said sides; anda drive control section for moving said engagement member to the engagement position for engagement with said engagement portion when an abnormal condition of said transmission belt is detected by said abnormality detection section, whereinsaid engagement rod is oriented in a substantially vertical direction, said stopper mechanism being engageable with said rod to halt a downward motion of the movable mold when said abnormal condition is detected.