Device for tensioning plant support wires, support system of said plants comprising such device and the method of support thereof

A wire tensioning device comprising:

• at least one wire tensioning member, formed as a bent metal fork having a first end as a bridge connected to a second end by two longitudinal arms, the second end having two free ends, and the at least one wire tensioning member being formed of a rod having a circular cross-section;
• a support member adapted to support the tensioning member in rotation, the support member having at least one through-hole;
• and
• blocking means to block the rotation of the tensioning member, the blocking means being a cam-shaped portion of the at least one through-hole, wherein
• the arms of the tensioning member penetrate the at least one through-hole so that the tensioning member rotates independently with respect to the support member to tension a wire, and the tensioning member reversibly engages with the cam-shaped portion,
• the support member and the blocking means are formed integrally,
• the arms extend from undercut portions positioned between the first end and the arms, the undercut portions extending in a direction toward each other, and the two free ends bending in a direction away from each other, and
• the cam-shaped portion is arranged to receive the undercut portions to block the rotation of the tensioning member.