Crosby IP IPBC Manual Del Usuario página 5

„ When tilting beams it might happen that on a certain moment the beam can tip, which may cause
the beam to swing. Therefore make sure that you are standing on a safe distance from the load.
„ During the descent of the load there may be no obstacles present under the load that can
impede the load causing a clamp to be unloaded. The clamps may only release the load when
it is in a stable position.
„ Remark: when handling the load, one should ensure that the load and or clamp does not
encounter obstacles which could release the load on the clamps prematurely.
„ A clamp is a device that must be clean when used. Dirt has an adverse effect on the operation
and also on the reliability of the clamp. When cleaning the clamp care should be taken to
ensuring that moving parts are lubricated and the gripping surfaces are clean. Regular cleaning
will enhance the life and reliability of the clamps.
3. Inspection protocols
Prior to every application of the clamp it is important the clamp operator inspects the clamp for
proper functioning. Attention must be paid to the following (see illustration(s) 2 for part reference):
„ Ensure that the plate surface with which the clamp is to come into contact is free of scale,
grease, oil, paint, water, ice, moisture, dirt and coatings that might impede the contact of the
gripping surface with the plate.
„ Inspect pivot(s) (C) and camsegment (B) for wear and defects. The pivot(s) and teeth must be
sharp and free of dirt.
„ Check the body (N) and the jaw for damage, cracks or deformation (this may indicate
overloading). The clamp must open and close properly (when the operation of the clamp is stiff
or heavy, it should be removed from operation for inspection).
„ Check the camsegment shaft (G) for readily detectable wear and/or damage (check also the
roll pin (P) which locks the camsegment shaft).
„ Check the torsion spring (M); this should, when pressing the camsegment (B), be under visible
tension. By releasing the the camsegment, the clamp should return to its closed position
without problems.
„ Check whether the W.L.L. and the jaw opening stamped on the body corresponds with the
load to be lifted. When this is no longer readable, remove the clamp from operation.
The pivot(s) and the camsegment are the most critical parts in the clamp and require extra attention
during inspection. Ensure in any event for good light during inspection. Observe the following rules
during every inspection:
Pivot(s): Reject when the sharpness of one ring is damaged or worn for 50% or more.
Camsegment: Reject when the sharpness of one tooth is damaged or worn for 50% or more.
This type of clamp can prone to deformation of the hole in which the chain (D-shackle) impinges,
resulting in the hole becoming oval. When that is the case the clamp should be removed from
service immediately. Deformation in this part is mainly due to exceeding of the maximum side load-
ing angle of 15°. The maximum loading angles are displayed in the loading diagrams 1.
On the inside of the front cover illustrations have been included of damaged and worn (rejected)
pivots and camsegments:
1. One complete tooth not sharp and one damaged
2. Two teeth damaged for 50%
3. One tooth damaged for 100% and one tooth damaged for 50%
4. Two rings damaged for 100%
5. Interior ring damaged for 100%
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