Device for gripping and adjusting the tension of an elongate element such as a cable, rope or the like

Device for gripping and adjusting the tension of an elongated component, said device being penetrated longitudinally in its middle part by said elongated component and comprising lengthwise a rear body, through which said component is inserted into device, and extended by a front tightening assembly, allowing the said component to emerge from device and applying force transversally on said elongated component through jaws positioned around, at least partially, said component and arranged inside said front assembly, said jaws being longitudinally mobile inside said front assembly under the action of at least one actuating means, said front assembly having at least a one-jaw guiding system in order to move together jaws closer together in order to grip said component inside said assembly, the distance between jaws decreasing as they move towards the front, characterised in that front tightening assembly is mobile relative to rear body and includes at least one means for joining it with jaws, such means becoming active after said jaws are placed in a gripping position, movement of said jaws driving the movement of said joined assembly which then applies a tractive force towards the front of elongated component.