LIGHT CONDENSING DEVICE AND HEAT COLLECTION FACILITY INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To stably rotate a mirror of a light condensing device around a shaft with high accuracy.SOLUTION: A drive device which directs sunlight reflected by a mirror to a predetermined light condensing position comprises: a first drive part 51 which is supported by a support base and which rotates a mirror structure around a first rotary shaft line A1; and a second drive part which is supported by the first drive part 51 and which rotates the mirror structure around a second rotary shaft line A2. The first drive part 51 includes: a first rotary shaft 52 with the first rotary shaft line A1 being a central axis line; a first rotary shaft supporting part 59 which rotatably supports the first rotary shaft 52; and a first drive mechanism 60 which rotates the first rotary shaft 52. The first rotary shaft supporting part 59 includes: a rear bearing 56 for supporting the first rotary shaft 52 in a position separating in the first rotary shaft direction from an intersection point Q1 between the first rotary shaft line A1 and a second rotary shaft line A2; a front bearing 55 for supporting the first rotary shaft 52 in a position closer to the intersection point Q1 than the rear bearing 56 in the first rotary shaft direction; and a connection member 57 for rigidly connecting the rear bearing 56 and the front bearing 55.