| 摘要 |
The system foresees for each plate ( 1 ) an autonomous mechanical structure composed of one section bar ( 3 ) connected to a gripper that holds a plate ( 1 ) as well as of another section bar ( 10 ) and at least two support arms ( 5, 5', 6, 6' ) hinged upon said section bars ( 3, 10 ); the structure is fixed to a section bar ( 9 ) that is in turn fixed to the display counter or window near the base of the tank; the support arms ( 5, 5', 6, 6' ) differ in length; two supports ( 4, 4', 11, 11' ) are fixed to each section bar ( 3, 10 ); said supports constitute the hinge members upon which the ends of the support arms ( 5, 5', 6, 6' ) fit; each plate ( 1 ) can both move in a parallelogram motion with translation parallel to the display counter or window, and open like a casement window using the pin ( 7 ) of the shorter support arm ( 5, 5' ) as a pivot; the system also contains a spring closing mechanism and a lock ( 18 ).
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