| 摘要 |
In order to prevent injury to the operator, the advance of the movable platen and mold is physically restrained, whenever the windowed safety gate is slightly opened, by a pawl which engages a notched guide bar connected to the movable platen. The movement of the pawl is controlled by a mechanical linkage connected to the safety gate and includes a telescopic torque shaft which is rotated upon opening or closing of the safety gate by a cam and a spherical cam follower associated, respectively, with the gate and the rotatable shaft. Circuitry is provided for detecting an inoperability of the pawl whenever the gate is opened so as to actuate an alarm system and also, if desired, shut down the hydraulic pumps.
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