Pull-out guide with synchronization means and dampening agents

Abstract

A drawer runner that can easily be installed and is able to bear heavy loads for the floor mounting of pharmacy cabinets has a carcass rail, a central rail and a pull-out rail. The pull-out rail is accommodated so that it can move in the central rail and, in turn, is accommodated so that it can move in the carcass rail in a nested manner, and is synchronized and damped.

What is claimed is: 
     
         1 . A drawer runner ( 1 ) comprising a carcass rail ( 2 ), a central rail ( 3 ) and a pull-out rail ( 4 ), wherein the pull-out rail ( 4 ) is accommodated such that it can move in the central rail ( 3 ), and in turn the latter is accommodated such that it can move in the carcass rail ( 2 ), wherein:
 the carcass rail ( 2 ) is designed to be essentially C-shaped in cross-section, with two free legs ( 5 ,  6 ) and a base plate ( 7 ) connecting these to each other, wherein the respective free ends ( 8 ,  9 ) of the free legs ( 5 ,  6 ) are bent towards each other, and wherein the carcass rail ( 2 ) has running tracks ( 10 ,  11 ) for track rollers ( 12 ) of the central rail ( 3 ), wherein   the central rail ( 3 ) has two side walls ( 14 ,  14 ′) spaced apart from each other by means of at least two spacers ( 13 ), wherein each side wall ( 14 ,  14 ′) has track rollers ( 12 ), wherein   the pull-out rail ( 4 ) is designed to be essentially C-shaped in cross-section, with two free legs ( 15 ,  16 ) and a base plate ( 17 ) connecting these to each other, wherein the base plate ( 17 ) projects beyond the free legs ( 15 ,  16 ) by means of a web ( 18 ) in cross-section, such that a running track ( 10 ,  11 ) for track rollers ( 12 ) of the central rail ( 3 ) is formed laterally from each leg ( 15 ,  16 ), wherein   a damping unit ( 19 ) is arranged on the central rail ( 3 ), which acts both in the direction of an open position, and in the direction of a closed position, of the pull-out rail ( 1 ), wherein   an actuator ( 20 ) for the actuation of the damping unit ( 19 ) is arranged on the carcass rail ( 2 ) on opposite sides in their respective end regions, wherein   the drawer runner ( 1 ) further has a synchronisation means ( 21 ), which in turn has two guide rollers ( 22 ,  23 ) and a cable ( 24 ) circulating around the latter, wherein the cable ( 24 ) is designed to be connected to the carcass rail ( 2 ) and the pull-out rail ( 4 ).   
     
     
         2 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the at least two spacers ( 13 ) each have a guide roller ( 22 ,  23 ), in particular in the form of an attached one-piece sleeve ( 26 ); a further spacer ( 13 ) preferably has a cable guide ( 27 ). 
     
     
         3 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the at least two spacers ( 13 ) are designed as a flat connecting part between the two side walls ( 14 ,  14 ′). 
     
     
         4 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein a first connecting part ( 25 ) is detachably attached to the carcass rail ( 2 ) between the guide rollers ( 22 ,  23 ), and a second connecting part ( 25 ) is detachably attached to the pull-out rail ( 4 ) in the direction of its end behind a guide roller ( 23 ), such that the force transmitted by the cable during a movement of the rails is transmitted to the said rails. 
     
     
         5 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the cable ( 24 ) is non-detachably attached to the carcass rail ( 2 ) between the guide rollers ( 22 ,  23 ), and a connecting part ( 25 ) is detachably attached to the pull-out rail ( 4 ) in the direction of its end behind a guide roller ( 23 ), such that the force transmitted by the cable in the course of a movement of the rails is transmitted to the said rails. 
     
     
         6 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the cable ( 24 ) is guided in a groove ( 33 ) for purposes of force transmission, and the connecting part ( 25 ) prevents the cable ( 24 ) from jumping out of the guide rollers ( 22 ,  23 ). 
     
     
         7 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the damping unit ( 19 ), which damps in two directions, has a common damper, a spring and two damping springs ( 35 ) that can be tensioned and released independently of each other. 
     
     
         8 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the damping unit ( 19 ) and/or the actuators ( 20 ) are detachably connected to the central rail ( 3 ) in a plug-in manner without tools. 
     
     
         9 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the side walls ( 14 ,  14 ′) of the central rail ( 3 ) are identical parts. 
     
     
         10 . The drawer runner ( 1 ) in accordance with  claim 1 , wherein the central rail ( 3 ) has two differential rollers ( 29 ). 
     
     
         11 . A method for the installation of a drawer runner ( 1 ), comprising the steps of:
 provision of a carcass rail ( 2 ), provision of a pull-out rail ( 4 ), assembly of the central rail ( 3 ) and assembly of the carcass, centre and pull-out rails ( 2 ,  3 ,  45 ) to form the drawer runner ( 1 ),   
       wherein the assembly of the central rail ( 3 ) comprises the steps of:
 connection of track rollers ( 12 ) to a first and a second side wall ( 14 ,  14 ′) of the central rail ( 3 ), 
 connection of at least two spacers ( 13 ) to the first side wall ( 14 ) of the central rail ( 3 ), 
 winding of a circulating cable ( 24 ) onto the guide rollers ( 22 ,  23 ), 
 fitting of the circulating cable ( 24 ) with guide rollers ( 22 ,  23 ) onto the spacers ( 13 ), assembly of the two side walls ( 14 ,  14 ′), and 
 
       wherein the assembly of the three rails ( 2 ,  3 ,  4 ) contains the steps of:
 introduction of the central rail ( 3 ) into the carcass rail ( 2 ), and fixing of the cable ( 24 ) to the carcass rail ( 2 ), followed by the introduction of the pull-out rail ( 4 ) into the central rail ( 3 ) and the fixing of the cable ( 24 ) to the pull-out rail ( 4 ), or 
 introduction of the pull-out rail ( 4 ) into the central rail ( 3 ), and fixing of the cable ( 24 ) to the pull-out rail ( 3 ), followed by the introduction of the pull-out rail and central rail ( 3 ) into the carcass rail ( 2 ), and the fixing of the cable ( 24 ) to the carcass rail ( 2 ).