| 摘要 |
FIELD: building. ^ SUBSTANCE: inventions refer to conveyor transport and can be used for moving of a loose material to trenches or channels. According to the first version, the jack ladder includes, at least, infinite chain partially directed on a shipping trench. The chain consists of loading elements which are supplied with scrapers. At least, the part of loading elements is supplied with the established roller elements with possibility of rolling on a bottom of a shipping trench, the rolling surface is located below a lower face of loading elements on which they are established. On loading elements, over a bottom of the shipping trench between scrapers of the next loading elements the shelves are fixed open-ended in such manner, that the roller element corresponding to given loading elements is located in a leat of the shelf covering it from above, or in shelf recess. According to the second version, the conveyor chain consists of the loading elements supplied with scrapers alternating with intermediate pieces which are deprived scrapers. At least, the part of loading elements and/or intermediate pieces are supplied established with rolling possibility on a bottom of a shipping trench using roller elements. On loading elements and-or intermediate pieces over a bottom of a shipping trench between scrapers of the next loading elements the shelves are fixed open-ended in such manner, that the roller element, corresponding to the given loading elements and/or intermediate pieces, is located in a leat of the shelf covering it from above, or in shelf cut. ^ EFFECT: decrease in a friction of chain links and moved material over a trench surface. ^ 9 cl, 5 dwg |
