Method for preliminary anchoring of a wire rope bolt
AssigneeOy Tampella AB
InventorsPauli A. T. Koistinen, Risto J. Hamalainen
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Abstract
The invention relates to a method and mechanism for preliminary anchoring of a wire rope bolt in a bore by means of friction. The object is to eliminate the need to use wooden wedges or to bend the strands of the rope backwards, procedures which are time-consuming. In accordance with the invention, a permanent deformation is produced in the wire rope bolt in such a way that friction force is produced when parts of the bolt press against the wall of the bore. The mechanism may comprise, fitted at a point prior to feeding rolls, a bending roll, which bends the wire rope before it is fed into the bore. The circumference of the feeding roll can be V-shaped, in which case it causes the bent wire rope to rotate and to become helical.
Claims7
A method of preliminarily anchoring a plural strand metal wire rope bolt in a bore prior to and to facilitate permanent anchoring comprising in a continuous operation the steps of:
- (a) feeding and permanently deforming the wire rope to be anchored by bending the same to form at least one arched portion therein;
- and
- (b) progressively feeding the arched portion into the bore so that the arched portion of the wire rope frictionally presses against the wall of the bore.
Dependencies are inferred from the claim text.