| 摘要 |
FIELD: mechanical engineering; tower cranes. ^ SUBSTANCE: proposed device is designed to form demountable connection between upper part of crane tower and fixed frame. Device contains cover plates arranged in four corners of horizontal square-section fixed frame orientated along frame diagonal or parallel to diagonal of frame. Cover plates lie within clearance limits of fixed frame tolerable for transportation of said frame. Other cover plates are secured in four corners of upper part of tower member from inner side of tower posts. Connecting rods are fitted in holes of said cover plates. Fixed frame contains also horizontal sheet resting on support plates, when tower member is assembled. Each said plate is welded to upper edge of each post of tower member. ^ EFFECT: reduced overall dimensions of fixed frame, improved convenience at transportation. ^ 8 cl, 7 dwg |
