Patent ID: 8303056

Claim:
In an article of furniture comprising a door compartment and a door which is collapsible and slidable into a concealed position inside the door compartment, said door comprising a first door wing, a second door wing pivotally connected to said first door wing, the first door wing being pivotally connected to a vertical door-supporting bar having guide rollers at a lower and upper end thereof and being arranged to travel inside the door compartment on lower and upper guideways extending therein, wherein the second door wing has guide carriages located on an upper and lower edge thereof which are arranged to travel in upper and lower continuous guideways extending parallel to a front edge of the article of furniture and inside the door compartment, the improvement comprising a toothed drive belt device for moving the door supporting bar inside the door compartment, said toothed drive belt device comprising a toothed belt arranged stationary inside the door compartment parallel to the direction of movement of the door-supporting bar, said toothed belt co-operating with a toothed wheel and guide pulleys carried by the door-supporting bar, at the upper and lower ends thereof, and a rotatable shaft upon which the toothed wheel is mounted, wherein the toothed wheel, together with a shaft thereof, is pivotally carried by a corresponding end portion of the door-supporting bar and the toothed belt is guided by the guide pulleys in an open loop around the toothed wheel, the door-supporting bar having a locking device which is arranged to lock the toothed wheel, when the door wings are in a coplanar closing position, and to release the toothed wheel, when the door wings are in a parallel opening position, wherein the guide pulleys and the guide rollers of the door-supporting bar are arranged to rotate about a common pivot.