Pull-out guide for a washing appliance, and washing appliance

Abstract

A pull-out guide has a first inner rail, a first outer rail mounted on the first inner rail a second inner rail secured on the first outer rail, and a second outer rail mounted on the second inner rail and on which a rack can be fastened. The first inner rail, the first outer rail, the second inner rail and the second outer rail are arranged vertically one above the other. The outer rails are designed in the form of hollow profiles with an accommodating region, which is partially open in the direction of the side wall and of the respective inner rail and is intended for accommodating the respective inner rail. The outer surfaces of the inner rails and the inner surfaces of the outer rails are in the form of run-off surfaces for preventing washing fluid which is used during operation of the washing appliance from being deposited.

1 . A pull-out guide for a washing appliance, in particular a dishwasher, for pulling a rack out of a washing chamber of the washing appliance, comprising
 a first inner rail which can be mounted on a side wall of the washing chamber,   a first outer rail which is mounted on the first inner rail such that it can be displaced in a displacement direction,   a second inner rail which is secured on the first outer rail,   a second outer rail which is displaceably mounted on the second inner rail and on which the rack can be fastened,   wherein   the first inner rail, the first outer rail, the second inner rail and the second outer rail are arranged vertically one above the other,   wherein the outer rails are designed in the form of hollow profiles with an accommodating region, which is partially open in the direction of the side wall and the respective inner rail and is provided for accommodating the respective inner rail   wherein the outer surfaces of the inner rails and the inner surfaces of the outer rails, said inner surfaces being directed towards the inner rails, are in the form of run-off surfaces, for preventing washing fluid which is used during operation of the washing appliance from being deposited.   
     
     
         2 . A pull-out guide according to  claim 1 , wherein at least one rolling element cage with rolling elements mounted therein is arranged between one of the respective inner rails and one of the respective outer rails. 
     
     
         3 . A pull-out guide according to  claim 1 , wherein the inner rails have a raceway section and a fastening and shielding section. 
     
     
         4 . A pull-out guide according to  claim 3 , wherein a shielding section of the fastening and shielding section of at least one of the inner rails is formed at least partly as an inclined surface which is inclined towards the side wall of the washing chamber. 
     
     
         5 . A pull-out guide according to  claim 1 , wherein the outer rails are designed to shield the respective inner rail from entry of fluid on a side facing the washing chamber in the mounted state. 
     
     
         6 . A pull-out guide according to  claim 5 , wherein a lower free end of a wall of the outer rails facing the washing chamber is formed to be bent from a vertical by a maximum of 90° in the direction of the fastening and shielding section of the respective inner rail. 
     
     
         7 . A pull-out guide according to  claim 1 , wherein the fastening and shielding section of the first inner rail is designed as an orifice-free piece of sheet metal for shielding the raceway section of the first inner rail arranged vertically above. 
     
     
         8 . A pull-out guide according to  claim 1 , wherein the second inner rail is fixed, in particular welded, glued or screwed, to the first outer rail. 
     
     
         9 . A pull-out guide according to  claim 1 , wherein the length of the inner rails is between 50% and 75% of the length of the outer rails. 
     
     
         10 . A pull-out guide according to  claim 1 , wherein three rolling elements are arranged in the rolling element cage in a plane orthogonally to the displacement direction between one of the respective inner rails and one of the respective outer rails. 
     
     
         11 . A pull-out guide according to  claim 10 , wherein the raceway section of the inner rails comprises at least three raceways, in each of which one of the rolling elements is guided, wherein, as seen in the plane perpendicular to the displacement direction, the rolling elements are arranged in respective quadrants of the cavity formed by the inner rail and outer rail, wherein no rolling element is used in a lower quadrant close to the side wall of the washing chamber. 
     
     
         12 . A washing appliance, having at least one rack which is fixed to side walls of a washing chamber with a pull-out guide and with which the rack can be pulled out of the washing chamber and be inserted into said chamber, wherein the pull-out guide is formed according to  claim 1 . 
     
     
         13 . A washing appliance according to  claim 12 , wherein at least two spacers or spacings, on which the first inner rail is fixed, are arranged on respective side walls of the washing chamber. 
     
     
         14 . A washing appliance according to  claim 13 , wherein a passage for the discharge of washing fluid into a lower region of the washing chamber is provided between the spacers or spacings, the side wall and the first inner rail.