Linear slide rail that can be extended to two times the service life

摘要

An object of the present invention is to provide a linear slide rail that can be extended twice to use life. A guide rail 40, and includes a sliding block 50, the convex rollers unit 60 and the concave roller unit 70, two of the rollers grooves 53 are respectively provided on both side portions of the guide rail and the slide block 50, the inner wall of the roller grooves, the first contact track surface and the second contact track plane is defined, the guide rail can be arranged using twice sliding block 50 back and forth, convex roller unit 60 or the concave sliding block 50 The primary inserted by selecting the form roller unit 70, the roller is brought into contact with them one of the contact locus of the guide rail 40, and wear and tear on the contact trajectory surface in the guide rail 40 use occurs, the opposite of the format as the previous The secondary insert in the slide block 50 is replaced with rollers, inserted in the slide block 50 is replaced with those of the type different from the rollers the previous, with another contact locus do not wear of the guide rail 40 to the roller contacting. .BACKGROUND 4