Method for using retainer, and retainer

Details Method for using retainer, and retainer Method for using retainer, and retainer

E - Fixed Constructions

21

B

E21B 19/24 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2734361

The invention relates to a method for using a retainer, and to a retainer. The retainer(14) comprises a first clamping arm (18a) and a second clamping arm (18b) provided with clamping jaws (21a, 21b) for clamping a drill rod (9), a rock bolt or the like. The clamping arms are turned in relation to their pivot points (19a, 19b) by an actuator (20), whereby the clamping jaws move either towards or away from each other. On the portion between the pivot points of the clamping arms there are shape members that interconnect the movements of the clamping arms to make them interdependent and thus synchronize the movements of the clamping arms in both directions of movement of the clamping arms.

Cette invention concerne un procédé d'utilisation d'un dispositif de retenue et un dispositif de retenue. Le dispositif de retenue (14) comprend un premier bras de serrage (18a) et un second bras de serrage (18b), dotés de mors de serrage (21a, 21b) pour serrer une tige de forage (9), un boulon d'ancrage ou similaires. Les bras de serrage sont entraînés en rotation par rapport à leurs points de pivotement (19a, 19b) par un actionneur (20). Ceci entraîne le rapprochement ou l'éloignement mutuel des mors de serrage. La partie située entre les points de pivotement des bras de serrage présente des éléments profilés qui solidarisent le mouvement des bras de serrage dans les deux directions de leur déplacement.

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