Heading machine

Abstract

In a heading machine ( 1 ) including a travelling mechanism ( 2 ) and a cutting boom ( 3 ) or frame, the cutting boom ( 3 ) or frame carries at least two rotating cutting heads ( 5 ) whose axes of rotation ( 6 ) extend in the heading direction or enclose acute angles with the heading direction and which, together, define a cutting profile having a profile width (a), as well as two cutting rollers ( 8,10 ) arranged substantially parallel and behind the cutting heads ( 5 ) and capable of being positioned on the floor ( 9 ) and on the roof ( 7 ), respectively. Both cutting rollers ( 8,10 ) comprise end portions ( 25 ) which are extendible to the width (a) of the profile for the formation of a substantially rectangular cutting profile.

1 . A heading machine comprising a travelling mechanism and a cutting boom or frame, wherein
 the cutting boom or frame carries at least two rotating cutting heads having axes of rotation extending in a heading direction or which enclose acute angles with the heading direction and which, together, define a cutting profile having a profile width, as well as two cutting rollers arranged substantially parallel and behind the cutting heads and adapted to being positioned on a floor and on a roof, respectively,   each of the cutting rollers ( 8 ,  10 ) comprise end portions ( 25 ) which are extendible to a width (a) of the cutting profile for formation of a substantially rectangular cutting profile,   each of the cutting rollers. ( 8 ,  10 ) is separately hinged to the cutting boom ( 3 ) or frame in a height-adjustable manner, and   each of the cutting rollers ( 8 ,  10 ) has a diameter corresponding to at least one fifth of the cutting diameter of the cutting heads ( 5 ).   
     
     
         2 . A heading machine according to  claim 1 , wherein each of the cutting rollers ( 8 ,  10 ) has a diameter corresponding to at least one fourth of the cutting diameter of the cutting heads ( 5 ). 
     
     
         3 . A heading machine according to  claim 1 , wherein the cutting heads ( 5 ) are provided with cutting tools ( 28 ) which are adjustable or extendible in the radial direction. 
     
     
         4 . A heading machine according to  claim 1 , wherein the cutting tools ( 28 ) are arranged on the cutting heads ( 5 ) in a manner that cutting tools ( 28 ) of a first one of the cutting heads ( 28 ) engage between cutting tools ( 28 ) of a second one of the cutting heads during rotation such that circular areas of respective cutting profiles ( 33 ) overlap one another. 
     
     
         5 . A heading machine according to  claim 1 , wherein the cutting rolls ( 8 ,  10 ) each comprise an individual drive ( 17 ,  18 ). 
     
     
         6 . A heading machine according to  claim 1 , wherein the cutting boom ( 3 ) or frame is arranged to be adjustable relative to the travelling mechanism ( 2 ) in a vertical direction. 
     
     
         7 . A heading machine according to  claim 2 , wherein the cutting heads ( 5 ) are provided with cutting tools ( 28 ) which are adjustable or extendible in the radial direction. 
     
     
         8 . A heading machine according to  claim 2 , wherein the cutting tools ( 28 ) are arranged on the cutting heads ( 5 ) in a manner that cutting tools ( 28 ) of a first one of the cutting heads ( 28 ) engage between cutting tools ( 28 ) of a second one of the cutting heads during rotation such that circular areas of respective cutting profiles ( 33 ) overlap one another. 
     
     
         9 . A heading machine according to  claim 3 , wherein the cutting tools ( 28 ) are arranged on the cutting heads ( 5 ) in a manner that cutting tools ( 28 ) of a first one of the cutting heads ( 28 ) engage between cutting tools ( 28 ) of a second one of the cutting heads during rotation such that circular areas of respective cutting profiles ( 33 ) overlap one another. 
     
     
         10 . A heading machine according to  claim 2 , wherein the cutting rolls ( 8 ,  10 ) each comprise an individual drive ( 17 ,  18 ). 
     
     
         11 . A heading machine according to  claim 3 , wherein the cutting rolls ( 8 ,  10 ) each comprise an individual drive ( 17 ,  18 ). 
     
     
         12 . A heading machine according to  claim 4 , wherein the cutting rolls ( 8 ,  10 ) each comprise an individual drive ( 17 ,  18 ). 
     
     
         13 . A heading machine according to  claim 2 , wherein the cutting boom ( 3 ) or frame is arranged to be adjustable relative to the travelling mechanism ( 2 ) in a vertical direction. 
     
     
         14 . A heading machine according to  claim 3 , wherein the cutting boom ( 3 ) or frame is arranged to be adjustable relative to the travelling mechanism ( 2 ) in a vertical direction. 
     
     
         15 . A heading machine according to  claim 4 , wherein the cutting boom ( 3 ) or frame is arranged to be adjustable relative to the travelling mechanism ( 2 ) in a vertical direction. 
     
     
         16 . A heading machine according to  claim 5 , wherein the cutting boom ( 3 ) or frame is arranged to be adjustable relative to the travelling mechanism ( 2 ) in a vertical direction.