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Vibration and Earthquake Isolation

Supports-of-boom-end-sheaves-or-similar-for-a-lifting-and-or-handling-machine

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Supports of boom end sheaves or similar for a lifting and/or handling machine

Details

Inventors: Simon, Francois;
Assignee:
Primary Examiner: Taylor; Billy S.
Assistant Examiner:
Attorney, Agent or Firm: Berger & Palmer

A support for boom end sheaves for lifting and/or handling machines, carrying at least a first sheave which receives a flexible rope, particularly a lifting cable, extending from the boom, is characterized in that it carries a pulley-block mounted on a lever which is swingingly carried by the support.

DETAILED DESCRIPTION I claim: 1.
A support for boom end sheaves for lifting and/or handling machines comprising a boom having a free end, a support member attached to said free end, a first sheave attached to said support member, said first sheave having an axis transverse to the longitudinal direction of said boom, a first pulley block comprising pulleys having an axis parallel to that of said first sheave, a lever articularly connected at one end to said first sheave and carrying said first pulley block at its other end, a lifting cable running along said boom, passing on said first sheave and then to said first pulley-block, said pulley axis of said first pulley block being fixed with respect to said lever.
2.
A support according to claim 1, wherein the axis of articulation of said lever on said support member is coincident with the axis of said first sheave.
3.
A support according to claims 1 or 2, wherein said support member is rotatably connected to said boom about an axis parallel to the longitudinal direction of the boom.
4.
A support according to claim 1, comprising first means for locking said lever to said support member in at least one position.
5.
A support according to claim 4, wherein said one position comprises that for which said lever is raised substantially to be in alignment with the boom longitudinal direction.
6.
A support according to claims 1 or 4, wherein a second lifting pulley-block is hung to said first pulley-block by means of said lifting cable, second means being provided for locking said second lifting pulley-block to said lever.

Description:
The invention relates to sheave support provided on boom ends, or similar, of lifting and/or handling machines.
Its object is to improve machines of said type which are used particularly for towing operations where the load is not always located at the vertical of the boom.
According to the present invention, the support of boom end sheaves or similar devices for lifting and/or handling machines, carrying at least one first sheave receiving a flexible rope, particularly a lifting cable, from the boom, is characterized in that it carries a pulley-block mounted on a lever swingingly supported by the support

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