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HIGHWAYS DEVICE,IN PARTICULAR MANHOLE,WITH FRAME AND PLUG WITH BACKWARD MOVEMENT RELATIVE TO THE FRAME TO ENSURE THE CLOSED POSITION OF THE PLUG IN THE FRAME
HIGHWAYS DEVICE,IN PARTICULAR MANHOLE,WITH FRAME AND PLUG WITH BACKWARD MOVEMENT RELATIVE TO THE FRAME TO ENSURE THE CLOSED POSITION OF THE PLUG IN THE FRAME
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机译:框架和塞子相对于框架向后移动的特殊人孔的高速公路装置,以确保塞子在框架中的闭合位置
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摘要
The manhole has a stop (38) secured to a frame and perpendicular to rear end wall (3) of the frame, and a self-locking arm (30) whose end is pivotally mounted to the frame and is slidable in a fixed longilinear guiding groove (35) such that the end approaches a front end wall (3) of the frame during tilting of a rectangular shaped plug (8) towards a closed position of the plug. The end bearing on the stop during tilting of the plug causes the plug to withdraw towards the rear end wall adjacent to a hinged side of the plug such that the plug closes an opening of the frame.
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