Tile levelling device

Abstract

A tile levelling device configured for the mutual levelling of two or more tiles with a joint defined therebetween including a monolithic tie rod including a transverse element elongated along at least one longitudinal axis and defining a rest plane for at least two adjacent laying tiles, at least one longitudinal stem protruding from the transverse element, wherein a maximum width of the transverse element is equal to or lower than a width of the joint and the stem has a height greater than the maximum thickness of the adjacent laying tiles, the stem having a transverse overall dimension equal to or less than the width of the joint. The device further includes at least one abutment body joined to a second end of the longitudinal stem and a presser adapted to cooperate with the abutment body of the tie rod and configured to exert pressure on the side-by-side tiles.

1 . A tile levelling device configured for the mutual levelling of two or more tiles already laid on a fresh or not fully hardened glue, wherein a joint is defined between the at least two adjacent laying tiles, wherein the device comprises:
 a monolithic tie rod comprising:   
       at least one transverse element elongated along at least one longitudinal axis and defining a rest plane for at least two adjacent laying tiles;
 at least one longitudinal stem protruding from the transverse element with a central axis squared with the rest plane of the transverse element and having a first end joined to the transverse element, wherein a maximum width of the transverse element is equal to or less than a width of the joint defined between the at least two adjacent laying tiles and the stem has a height greater than the maximum thickness of the adjacent laying tiles to be levelled, wherein the stem has a transverse overall dimension equal to or less than the width of said joint; and 
 
       at least one abutment body joined to a second end of the longitudinal stem; 
       the device further comprising:
 a presser adapted to cooperate with the abutment body of the tie rod and configured to exert pressure on the side-by-side tiles. 
 
     
     
         2 . The device according to  claim 1 , wherein the first end of the stem is joined to the transverse element in a frangible manner. 
     
     
         3 . The device according to  claim 2 , wherein the first end of the stem forms with the transverse element an edge that acts as a fracture trigger line at the stem-transverse element interface. 
     
     
         4 . The device according to  claim 1 , wherein the stem has a constant cross-section over the entire height thereof. 
     
     
         5 . The device according to  claim 1 , wherein the stem has a cross section having an elongated, preferably elliptical shape, wherein a larger diameter is orthogonal to the longitudinal axis of the transverse element. 
     
     
         6 . The device according to  claim 1 , wherein the stem has a predetermined torsional elasticity, so as to allow a rotation of the transverse element joined to the first end of the stem, around the longitudinal axis of the stem, by at least 90° with respect to the second end, starting from an unperturbed starting position, without plastic yielding of the stem, and the elastic return of the transverse element to the starting position. 
     
     
         7 . The device according to  claim 1 , wherein the abutment body comprises a threaded pin provided with a thread having a parallel screwing axis coinciding with the central axis of the stem and the presser comprises a knob provided with a screw nut that can be screwed on the threaded pin. 
     
     
         8 . The device according to  claim 1 , the tie rod comprises a handle element protruding from the abutment body and configured to be able to rotate the tie rod about the central axis of the stem. 
     
     
         9 . The device according to  claim 1 , wherein the abutment body comprises a serrated strap and the presser comprises a knob provided with at least one tooth configured to engage the serrated strap in a pop-up manner. 
     
     
         10 . The device according to  claim 1 , wherein the presser comprises a wedge and the tie rod comprises a pair of stems spaced apart from each other by a through opening adapted to be crossed at least partially by the wedge and delimited at the top by a crosspiece that acts as an abutment element and that unites the second end of the stems, wherein a respective transverse element is joined to the first end of each stem, wherein the longitudinal axis of each transverse element is orthogonal to a longitudinal axis of the crosspiece, each stem preferably having a predetermined torsional elasticity, so as to allow a rotation of the respective transverse element joined to the first end of the stem, around the longitudinal axis of the same stem, by at least 90° with respect to the second end, starting from an unperturbed starting position, without plastic yielding of the stem, and the return of the transverse element to the starting position. 
     
     
         11 . The device according to  claim 1 , wherein the tie rod is made of a plastic material.