Patent ID: 8887629

Claim:
A retainer unit for use in a wire guide track arrangement of a wire binding machine in order to retain and subsequently release a wire during the tightening thereof around one or more objects, the retainer unit ( 1 ) comprising: a base ( 2 ) to be fixedly mounted to a structural part of a wire guide track arrangement of a wire binding machine; and a wire retaining member ( 10 ), which is pivotally mounted to the base ( 2 ) and comprises a wire contacting part ( 11 ) intended to come into contact with a wire during the tightening thereof around one or more objects, the wire retaining member ( 10 ) being pivotable, under the action of a press force exerted by a wire bearing against the wire contacting part ( 11 ), from an advanced wire retaining position, in which the wire retaining member ( 10 ) keeps the wire retained to the retainer unit ( 1 ), to a retracted wire releasing position, in which the wire is released from the retainer unit ( 1 ), wherein the retainer unit ( 1 ) comprises a blocking mechanism ( 20 ), which is moveable from a blocking position, in which the blocking mechanism ( 20 ) prevents the wire retaining member ( 10 ) from being pivoted from the wire retaining position to the wire releasing position, to a non-blocking position, in which the blocking mechanism ( 20 ) allows the wire retaining member ( 10 ) to be pivoted from the wire retaining position to the wire releasing position; and the blocking mechanism ( 20 ) is arranged to move from the blocking position to the non-blocking position under the effect of said wire when the wire, during the tightening thereof around one or more objects and on reaching a given inclination towards the wire contacting part ( 11 ) of the wire retaining member ( 10 ), comes into contact with a maneuvering member ( 21 ) included in the blocking mechanism ( 20 ) and moves this maneuvering member ( 21 ) from an advanced position to a retracted position.