| 摘要 |
A collapsible safety prop for supporting a waterway dam gate comprising first and second links, each of which has a longitudinal axis and an inner and outer end. The inner ends of the links are provided with a lateral member extending laterally from the longitudinal axis of the links. Each of the lateral members further includes a pivot substantially offset from the longitudinal axis of the links. A pivot pin connects each of the pivots and thereby interconnects the two links. Shear engaging mechanism are provided on the inner ends of the links and positioned on the longitudinal axis of the links and spaced a substantial distance from the pivot pin. Shear mechanism for connecting the shear engaging means are provided and positioned on the inner ends of the links for normally locking the prop links against pivotal movement. The outer ends of each of the links are also provided with pivot mechanism. One link outer end pivot mechanism is engageable with a collapsible wicket or wall while the other link outer end pivot mechanism is releasibly engageable with a stop surface. If sufficient pressure is exerted against the wall, for example when a barge or other vessel inadvertently impacts against the wall, the shear means will sever causing the first and second links to pivot about the pivot pin and thereby permit the wall to collapse and avoid repeated impact.
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