Folding armchair for conference halls

Abstract

The invention relates to a folding armchair for conference halls, formed by a seat ( 1 ) and a backrest ( 2 ) articulated to one another and the assembly being arranged by means of articulations ( 9 ) between the seat ( 1 ) and side supports ( 5 ), rotation devices ( 10 ) being incorporated in the articulations ( 9 ), which rotation devices allow a free rotation in the direction of the swinging of the seat ( 1 ) towards a use position, but which in the direction of swinging towards an upward folded position determine a progressive damping of the rotation.

1 . A folding armchair for conference halls, comprising a seat ( 1 ) and a backrest ( 2 ) articulated to one another and the assembly being mounted by means of articulations ( 9 ) between the seat ( 1 ) and side supports ( 5 ), the backrest ( 2 ) exerting with its weight an action determining the withdrawal of the assembly in a folded position when the armchair is vacated, characterized in that in the mounting articulations ( 9 ) for the mounting on the side supports ( 5 ) there are incorporated rotation devices ( 10 ) which have a mechanism allowing a free rotation in the direction of the swinging of the seat ( 1 ) towards a use position, determining a progressive damping of the rotation in the direction of the swinging towards the folded position. 
   
   
       2 . The folding armchair for conference halls according to  claim 1 , characterized in that the rotation devices ( 10 ) which are incorporated in the mounting articulations ( 9 ) for the mounting on the side supports ( 5 ) comprise a peripheral part ( 10 . 1 ) and a central part ( 10 . 2 ) which can rotate in relation to one another, rollers ( 10 . 3 ) being included between them which allow the free rotation in one direction, whereas in the other direction they cause a progressive damping of the rotation. 
   
   
       3 . The folding armchair for conference halls according to  claim 1 , characterized in that the central part ( 10 . 2 ) of the rotation devices ( 10 ) axially incorporates a rod ( 11 ) provided at the end with a transverse conformation ( 12 ) by means of which it fits in a groove ( 13 ) of the end of a rod ( 14 ) emerging from a plate ( 3 ) which is fixed to the seat ( 1 ). 
   
   
       4 . The folding armchair for conference halls according to  claim 1 , characterized in that the transverse conformation ( 12 ) of the rod ( 11 ) of the rotation devices ( 10 ) has a slightly smaller width than the groove ( 13 ) for the fitting in the corresponding rods ( 14 ), determining a clearance which makes there be no rotational pulling of the central part ( 10 . 2 ) of said rotation devices ( 10 ) in a first path of the swinging rotation of the seat ( 1 ) towards the folded position, said rotation devices performing a progressive damping after this initial path of the rotation, to make the folding smoother. 
   
   
       5 . The folding armchair for conference halls according to  claim 2 , characterized in that the central part ( 10 . 2 ) of the rotation devices ( 10 ) axially incorporates a rod ( 11 ) provided at the end with a transverse conformation ( 12 ) by means of which it fits in a groove ( 13 ) of the end of a rod ( 14 ) emerging from a plate ( 3 ) which is fixed to the seat ( 1 ). 
   
   
       6 . The folding armchair for conference halls according to  claim 2 , characterized in that the transverse conformation ( 12 ) of the rod ( 11 ) of the rotation devices ( 10 ) has a slightly smaller width than the groove ( 13 ) for the fitting in the corresponding rods ( 14 ), determining a clearance which makes there be no rotational pulling of the central part ( 10 . 2 ) of said rotation devices ( 10 ) in a first path of the swinging rotation of the seat ( 1 ) towards the folded position, said rotation devices performing a progressive damping after this initial path of the rotation, to make the folding smoother. 
   
   
       7 . The folding armchair for conference halls according to  claim 3 , characterized in that the transverse conformation ( 12 ) of the rod ( 11 ) of the rotation devices ( 10 ) has a slightly smaller width than the groove ( 13 ) for the fitting in the corresponding rods ( 14 ), determining a clearance which makes there be no rotational pulling of the central part ( 10 . 2 ) of said rotation devices ( 10 ) in a first path of the swinging rotation of the seat ( 1 ) towards the folded position, said rotation devices performing a progressive damping after this initial path of the rotation, to make the folding smoother.