| 摘要 |
1. Mechanised mining casing consisting of a sill piece, roof-bar and hydraulic supports equipped with articulated joints possessing opened longitudinal cuts through which pins of the bolt situated in the opening of the hydraulic support head are introduced into the socket characterised in that the sockets (6) of the articulated joints (4) possess, at the opposite sides of the head (7), undercuttings (11) with the bearing surface (8), preferably perpendicular to the axis of the bolt (9), and the bolt (9) possesses the mountings (12) with end faces (13) in the distance shorter than the distance of the bearing surfaces (8) of undercuttings (11) of the socket (6), and both pins (10) of the bolt (9) are located in the openings (15) of fastening elements (14) which, in turn, are separately fixed to the socket (6) with the use of the mandrel (16) inserted in the socket (6) opening (18) and protected against shifting out, preferably with the use of a safety pin (19) slided over on the groove (17).<IMAGE>
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