Apparatus for positioning anchor bolts and method of using same

A rock boring tool for use with a drill steel for forming a drill hole in a rock face, the tool comprising a vertically elongated air-leg and a drive selectively operable to reciprocally move said air-leg in a vertical direction,

• the air-leg including a nose portion positionable proximate to the rock face and having a socket configured for coupling the drill steel thereto, and
• a tendon positioning assembly for urging a reinforcing tendon into the drill hole, the assembly comprising,
• a body, a bore extending through the body along an axis from an infeed end opening to the outfeed end opening, the bore having at least one surface portion tapering inwardly from an enlarged diameter portion spaced towards the outfeed end opening towards a reduced diameter portion spaced towards infeed end opening, the bore being sized to permit sliding movement of the tendon therealong,
• a wedge member disposed at least partially in said bore, the wedge member movable in the axial direction relative to said body between an engaging position spaced towards the reduced diameter portion so as to be frictionally engageable with a tendon, whereby engaging contact between the tendon and at least one of the bore and the wedge member restricts relative axial sliding of the tendon downwardly from the body, and an uncoupled position wherein said wedge member is moved towards the enlarged diameter portion to permit sliding of the tendon upwardly relative to the body,
• the body further defining a generally vertically elongated open throat extending laterally into the bore, the throat being sized to permit movement of at least part the tendon therethrough laterally into the bore.