| 摘要 |
A rack comprises two upright elements and a girder element, wherein the girder element extends between the two upright elements and comprises couplers, wherein the upright element or the coupler is provided with at least one coupling cam, whilst the other is provided with a cam-receiving groove belonging to the coupling cam, which cam-receiving groove has at least one open end and is delimited, at least partially, by a cam-supporting wall, and wherein the upright element or the coupler is additionally provided with at least one substantially vertically extending coupling rib, whilst the other is provided with a rib-receiving groove belonging to the coupling rib. At least one free end of the cross section of the coupling cam extends substantially in the direction of the longitudinal axis of the girder element, and the free end of the cross section of the coupling rib extends substantially in the direction perpendicular to the longitudinal axis of the girder element.
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