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AssigneeIshikawajima-Harima Jukogyo Kabushiki Kaisha
InventorsHiroshi Kawashita, Takeshi Sakano, Nobuyoshi Hanada
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The present invention discloses a device for gripping and lifting large-sized T-shaped structural members (to be referred to as the "T structural member" for brevity in this specification) each consisting of a face plate and a web plate. The T structural member gripping and lifting device comprises a beam adapted to be suspended from a crane or the like, a plurality of trolleys movably mounted on the beam and remotely controlled so as to adjust the spacing therebetween, a gripping unit suspended from each trolley and remotely controllable so as to grip or release the face plate of a T structural member, and a remote control unit for controlling the trolleys and the gripping units whereby the T structural member may be automatically gripped, lifted and released. Handling efficiency may be considerably increased to such an extent hitherto unattainable by any conventional devices, and the safeguarded operations may be ensured.
In a structural member gripping and lifting device of the type having a beam, a pair of trolleys mounted on the beam and means to vary the spacing between the trolleys, the improvement comprising a gripping unit suspended from each trolley, each unit including a support having a pair of spaced-apart gripping cams mounted thereon, means on the support for moving said cams toward each other to bring the cams into engagement with one face of said member adjacent opposite edges of the member, a pair of pressure plates engageable with the opposite face of said member so that the member is clamped between the cams and pressure plates, each of said pressure plates having a portion engageable with an edge of the structural member to move the plates into firm engagement with said opposite face of the member in response to operation of said moving means to move the cams toward each other, and a lifting shackle pivotally connected with said support and connected with a trolley.
Dependencies are inferred from the claim text.