FIELD: construction.
SUBSTANCE: link contains first and second lenghthened elements which properly have the first and the second ends with junctional facilities, and also fixing system for reciprocal lenghthened elements in variety of defined positions, corresponding to variety of link working length. The second lenghthened element has a couple of U-shaped long guide groove. The first lengthen element has two longitudinal walls, its edges at sliding moving in lengthwise displacement catch guide grooves, forming joint which prevents lenghthened elements unlinking orthogonal to its reciprocal sliding moving direction. The second lenghthened element has two parallel longitudinal ribs, outside walls of which form inside walls of guide grooves. Inside walls of longitudinal ribs are turned to each other and form longitudinal channel. Turned to each other internal walls of longitudinal ribs are implemented with fit cogs. The first lengthen element has through-hole, inwards which fixing element enters. Fixing element has on two opposite sides cogs implemented with ability of toothing the second lenghthened element.
EFFECT: maintainability improvement.
4 cl, 7 dwg
