| 摘要 |
FIELD: mechanical engineering; load lifting facilities; tower cranes. ^ SUBSTANCE: proposed gantry has upper support frame, posts connected with frame, lower longitudinal beams with holes for pivots of running trucks coupled with posts. Sockets are made in lower part of support frame. Post-to-support frame joint is arranged in each socket. Each longitudinal beam is provided with eyes in its middle part arranged close to each other and designed to receive pins of detachable joints. Symmetrical cone is located between said eyes, being attached to each longitudinal beam and pointed upwards by its vertex. Posts are detachably connected with beams by pins. Each post is made of pair of rigidly interconnected outer and inner supports, cone being arranged on beam between adjacent inner supports of posts. ^ EFFECT: simplified design of gantry, reduced labor input in manufacture, mounting and demounting. ^ 6 cl, 10 dwg |
