FIELD: mining industry. SUBSTANCE: derrick has hoisting equipment including parallel guides each having vertical main guide rail, rack guide rail parallel to main guide rail and connecting guide part located in derrick lower part between two said rails, pinion rack with possible sliding and located in each guide. Said pinion racks are separated into segments successively arranged, preferably, hinged to one another and resting on one another when pinion rack or its part is found in vertical main guide rail. Main guide rail is adapted for provision of horizontal support for pinion rack segments. There are load taken resting on pinion racks located in corresponding vertical main guide rails, and driving mechanism including driving gear wheels meshed with pinion rack in respective vertical guide rails. EFFECT: higher efficiency and operating reliability. 14 cl, 9 dwg
Authors
Dates
2003-05-10—Published
1998-04-23—Filed