| 摘要 |
PROBLEM TO BE SOLVED: To provide an auto-lock type door closing mechanism for a vacuum cabin to generate a force for automatically locking a valve when the valve is closed. ! SOLUTION: A frame 10 is a hollow frame comprised of a pedestal 11, two side frames 12 and an edge part 13. A driving air cylinder 20 is mounted on the pedestal 11 and this cylinder is a usual prior art pneumatic cylinder or a hydraulic cylinder having a driving shaft 21 which actively shrinks. A lateral rod 30 is mounted at the end portion of the driving shaft 21 and perpendicular to the axial center of the driving shaft 21. The first rod member 40 has one end pivotally arranged at the end part of the lateral rod 30. A swiveling rod member 50 forms a triangular shape at its upper end and has a first hinge hole 51, a second hinge hole 52 and a third hinge 53. An adjustment block 60 is connected to the edge part 13 and pivotally arranged in the second hinge hole 52. A second rod member 70 is pivotally arranged in the third hinge hole 53 |
