| 摘要 |
An overload protection apparatus for a press having a plurality of slide points for supporting a slide of the press, and a plurality of oil chambers in which pressure is generated in proportion to the pressure applied to the slide. The oil chambers are preferably provided at said slide points. A protector valve having an oil chamber is in flow communication with each of the oil chambers of the slide points via passages. Logic valves are disposed in the passages between the oil chambers of the slide points and the oil chamber of the protector valve for preventing working fluid, such as oil, from flowing from the oil chamber of the protector valve to the oil chambers of said slide points. Preferably, pressure sensors are provided at each oil chamber of the slide points for detecting the pressure of the oil in the chambers of the slide points.
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