Abstract: The invention can be used to secure writing tablets to different types of chairs with legs of different thicknesses and diameters, such that writing tablets can be installed on simple chairs with no armrests. The invention is essentially characterized in that it comprises: a main part having two through-holes therein, namely a first hole for receiving and housing the tubular support of the writing tablet and a second hole dimensioned to be coupled to one of the legs of the chair, and a vertical rod; and a pivoting part connected to the main part by means of the rod, aligned with the second hole and adapted to open and close such that the securing element can be released from the leg of the chair.

Abstract: The invention enables distribution of a series of chairs in row alignment, preventing undesired shifting and movement thereof, being especially intended for chairs having a bottom frame disposed underneath the seat, said frame having at least one tubular profile whereupon the seat rests; said device standing out for comprising a female part and a male part associated to the tubular profile of the chair, destined for being solidarily connected to other male and female parts, respectively, of chairs disposed in adjacent lateral positions, and where the female and male parts comprise pivoting means which allow extraction and retraction of these in a fast and simple manner, depending on whether or not arrangement of chairs in row alignment is required.

Abstract: The invention can be used to secure writing tablets to different types of chairs with legs of different thicknesses and diameters, such that writing tablets can be installed on simple chairs with no armrests. The invention is essentially characterised in that it comprises: a main part having two through-holes therein, namely a first hole for receiving and housing the tubular support of the writing tablet and a second hole dimensioned to be coupled to one of the legs of the chair, and a vertical rod; and a pivoting part connected to the main part by means of the rod, aligned with the second hole and adapted to open and close such that the securing element can be released from the leg of the chair.