PLATE OF SUPPORT FRAME Russian patent published in 2010 - IPC E21C27/32 

FIELD: mining.

SUBSTANCE: drawing knife includes the plate of support frame consisting of middle part rigidly attached to the drawing knife body and two external parts connected to it in a movable manner, guide shoes on the end of each part of the support frame plate, which is located on the side of laying; those guide shoes are used for introducing the support frame plate in guide channels for pull chain of the drawing knife. Drawing knife also includes at least one chain shoe which interacts with support frame plate and intended for each direction of the drawing knife movement and for attachment of its pull chain. Both chain shoes are provided on pusher which is inserted with possibility of being replaced or provided with possibility of being inserted on the end of the middle part of support frame plate on the side of laying to the groove. Groove is restricted in both directions of drawing knife movement with one shoe part respectively, which forms and integral component part of the middle part of support frame plate, equipped with guide shoe and has support surface for pusher.

EFFECT: improving attachment of pull chain of the drawing knife or hinged connection on the side of laying between parts of support frame plate, and improving running characteristic of the chain.

16 cl, 9 dwg