PURPOSE: To absorb dislocation due to thermal expansion in a combustor and; a housing, and a scroll, components connected to the combustor.

CONSTITUTION: In a combustor 1, its upper end 1a is supported by rolling contact due to a ball 9 on a member 11 secured to a housing 10. Its lower end side is supported by a ring-like member 5 engaged with a projecting part 1b, a ring-like member 4 engaged with a member 11 through a spring 12, and a birdcage-like member 15 formed of a plurality of bars 8 relatively displaceable with the two ring-like members (4). The mouth 13a of a scroll 13 is fitted to the lower end of the combustor 1 by means of a clearance spring.