Patent ID: 8197164

Claim:
A machining head ( 10 ) for a machine tool, which includes a spindle unit ( 20 ) including a spindle ( 21 ) to which a tool is attachable, and a support head component ( 30 ) that supports the spindle unit ( 20 ), the support head component ( 30 ) including an index mechanism that uses a drive motor ( 33 ) as a drive source to rotate the spindle unit ( 20 ) about an axis line extending perpendicular to a rotary axis line of the spindle ( 21 ) in order to index an angular position of the spindle unit ( 20 ), characterized in that the support head component includes first and second support segments ( 30 a , 30 b ) and a base segment ( 30 c ) that supports both the first and second support segments ( 30 a , 30 b ), the first and second support segments ( 30 a , 30 b ) being disposed opposite to each other across the spindle unit ( 20 ) to hold the spindle unit ( 20 ) therebetween such that a center of axle of the spindle unit ( 20 ) is aligned with the rotary axis line, the first and second support segments ( 30 a , 30 b ) respectively including support shafts ( 32 , 37 b , 38 b , 39 b ) whose opposing end surfaces have the spindle unit ( 20 ) secured thereto, that at least one of the first and second support segments ( 30 a , 30 b ) includes a housing ( 31 a , 31 b ) as a main body that is independent of the base segment ( 30 c ), that the housing ( 31 a , 31 b ) is attached to the base segment ( 30 c ) by means of a plurality of first screw members ( 17 ) screwed to the base segment ( 30 c ), the plurality of first screw members ( 17 ) being manipulatable from the outside of the base segment ( 30 c ) or the housing ( 31 a , 31 b ) in a state where the housing ( 31 a , 31 b ) is attached to the base segment ( 30 c ), and that the spindle unit ( 20 ) is attached to the support shafts ( 32 , 37 b , 38 b , 39 b ) by means of a plurality of second screw members ( 13 , 15 ) screwed to the support shafts ( 32 , 37 b , 38 b , 39 b ), the plurality of second screw members ( 13 , 15 ) being manipulatable from the outside of the housing ( 31 a , 31 b ) in a state where a corresponding one of the support shafts ( 32 , 37 b , 38 b , 39 b ) is contained within the housing ( 31 a , 31 b ).