Slide rail

Abstract

In the present slide rail a space receives a roller. Upper and lower rollers have their respective axes for rotation having inclinations of θ and −θ°, respectively, relative to an axis perpendicular to a body of the external rail. Thus the slide rail can have a simple structure.

What is claimed is:  
     
         1 . A slide rail comprising an external rail, an internal rail and a roller arranged between said external rail and said internal rail, said external rail and said internal rail being slideable relative to each other, wherein said external rail accommodates said internal rail, between a side of said internal rail facing outward and that of said external rail facing inward there being provided opposite spaces each receiving said roller having an axis for rotation traversing a plane in which the slide rail slides, said axis for rotation being spaced from each other by a distance reduced as said axis of rotation comes closer to said external rail.  
     
     
         2 . The slide rail of    claim 1   , wherein: 
 said external rail includes a body extending in a direction in which the slide rail slides, a flange raised at each of opposite sides of said body of said external rail, and a raised portion provided at each of opposite ends of said flange of said external rail to extend inward facing said body of said external rail;    said internal rail includes a body extending in the direction in which the slide rail slides, a flange raised at each of opposite sides of said body of said internal rail, and a raised portion provided at each of opposite ends of said flange of said internal rail to extend outward facing said body; and    Said external rail accommodates said internal rail to have their respective internal sides facing each other, an outer side of said flange and raised portion of said internal rail and an inner side of said flange and raised portion of said external rail together define opposite spaces each accommodating said roller with a rolling surface in contact with said flange of said internal rail and said flange of said external rail, said roller each having an axis for rotation traversing the plane in which the slide rail slides and spaced from each other by a distance reduced as said axis for rotation comes closer to said external rail.    
     
     
         3 . The slide rail of    claim 2   , wherein said flange of said external rail and said flange of said internal rail each have a surface contacting a rolling surface of said roller, parallel thereto.  
     
     
         4 . The slide rail of    claim 2   , wherein a portion of said raised portion of said external rail closer to said roller and that of said raised portion of said internal rail closer to said roller are each substantially parallel to a side surface of said roller.  
     
     
         5 . The slide rail of    claim 2   , wherein said space receives more than one said roller integrally supported by a supporting rail provided between said external rail and said internal rail.