Tensioning device for prestressing a rod, and related tensioning method
First Claim
1. A device for tensioning a threaded rod (1) comprising an actuator (5) capable of exerting an axial tensioning force, a puller (6) for transmitting the axial tensioning force from the actuator (5) toward a threaded end (1b) of the rod (1), the puller (6) comprising at least two jaws (31) which can move between a closed position in which the puller (6) is in engagement with a threaded end (1b) of a rod (1), and an open position in which the jaws (31) are disengaged from the threaded rod (1), and a locking element (45) which can move between a stable position for opening the jaws (31) and a stable position for closing the jaws (31), characterized in that the locking element comprises a sleeve (46) sliding axially between the jaws (31) and provided, over an axial segment of the sleeve (46), with bulges (47) for separating the jaws (31).
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a device for tensioning a threaded rod (1). The inventive device comprises: an actuator (5) which can exert an axial force; and a tie rod (6) which transmits the axial force from the actuator (5) towards a threaded end (1b) of the rod (1b), said tie rod (6) comprising at least two jaws (31) which can move radially between a closed position, in which the tie rod (6) is engaged with a threaded end (1b) of the rod (1), and an open position. in which the jaws (31) are disengaged from the threaded rod (1b). Moreover, said device comprises a locking element (45) which can move between a jaw (31) opening position and a jaw (31) closing position.
78 Citations
13 Claims
- 1. A device for tensioning a threaded rod (1) comprising an actuator (5) capable of exerting an axial tensioning force, a puller (6) for transmitting the axial tensioning force from the actuator (5) toward a threaded end (1b) of the rod (1), the puller (6) comprising at least two jaws (31) which can move between a closed position in which the puller (6) is in engagement with a threaded end (1b) of a rod (1), and an open position in which the jaws (31) are disengaged from the threaded rod (1), and a locking element (45) which can move between a stable position for opening the jaws (31) and a stable position for closing the jaws (31), characterized in that the locking element comprises a sleeve (46) sliding axially between the jaws (31) and provided, over an axial segment of the sleeve (46), with bulges (47) for separating the jaws (31).
-
5. The device as claimed in, characterized in that the jaws (31) can move essentially in a radial direction.
-
13. A method of tensioning a threaded rod, characterized in that jaws (31) of a puller (6) are kept separated with the aid of a locking element (45) displaced axially between the jaws and having bulges for separating the jaws, the jaws (31) are released by axially sliding the locking element (45) so that the jaws close over one end (1b) of the rod (1), and then an axial tensioning force is exerted on the threaded rod (1) with the aid of an actuator (5) acting on the puller (6).
Specification