| 摘要 |
FIELD: building, particularly attachments to perform construction-and-assembling operations. ^ SUBSTANCE: support strut comprises telescopic lower pipe with threaded end, adjusting nut and fixer, as well as upper pipe with orifices for fixer receiving with stopping means. The strut also has rotary supporting unit mounted in lower part of lower pipe and arranged from outside thereof. The threaded end is made as adapter sleeve with stepped outer surface. The adapter sleeve is partly inserted in lower pipe by part thereof having lesser diameter and is fixedly secured to upper end of lower pipe, for instance by welding thereof. Adapter sleeve part having greater diameter is provided with longitudinal cuts and with thread having semicircular crests. Gap of 3-4 mm dimension is created along threads of the sleeve and the nut after application of coating having friction coefficient lesser than critical one. The gap extends along the full perimeter thereof. The adjusting nut has extension. The fixer is arranged above the adjusting nut and is made as rigid closed contour surrounding sleeve part of greater diameter. The fixer may be shaped as oval and is provided with support pin arranged inside the fixer and extending along longitudinal axis thereof. The support pin freely enters in upper pipe orifice and in sleeve cuts during connection thereof. Pin length exceeds sleeve diameter. Upper pipe have bearing installed in upper part thereof. The stop is made as collar connected to lower part of upper pipe. The pipes are prestressed. ^ EFFECT: increased reliability and service life. ^ 6 cl, 6 dwg |
