Gantry

1. A gantry comprising:

a rotating frame including an X-ray tube and an X-ray detector configured to detect X-rays emitted from the X-ray tube;

a fixing mechanism configured to support the rotating frame so as to be rotatable on a rotation axis;

a cover configured to cover the rotating frame; and

an air sending mechanism that is installed on a lateral face on an outer circumferential side of the cover with respect to the rotation axis and is configured to send air sucked in from an exterior of the rotating frame to the rotation axis side of the rotating frame, wherein

the air sending mechanism is installed so as to be offset from the rotating frame, to be tilted at a predetermined angle with respect to the rotation axis direction, and to be tilted with respect to a plane vertical to the rotation axis direction.

2. The gantry according to claim 1 , wherein

the fixing mechanism is capable of supporting the rotating frame so as to be tilted at a predetermined angle with respect to a tilting shaft, and

the air sending mechanism is installed in a vicinity of the tilting shaft.

3. the gantry according to claim 1 , wherein the air sending mechanism is an air intake fan.

4. The gantry according to claim 3 , wherein

the air sending mechanism further includes a duct, and

the duct sends exterior air sucked in by the air intake fan to the rotation axis side of the rotating frame.

5. The gantry according to claim 3 , wherein the air intake fan is, as being offset, installed on an outside of the rotating frame, in terms of the rotation axis direction of the rotating frame.

6. The gantry according to claim 4 , wherein the air intake fan is, as being offset, installed on an outside of the rotating frame, in terms of the rotation axis direction of the rotating frame.

7. The gantry according to claim 4 , wherein the air intake fan is, as being offset, installed so as to be tilted at a predetermined angle with respect to the rotation axis direction, while being positioned on an inside of the rotating frame in terms of the rotation axis direction of the rotating frame.

8. The gantry according to claim 1 , wherein the air sending mechanism is a duct.

9. The gantry according to claim 1 , further comprising: a shaping mechanism configured to be able to shape an air flow formed by a rotation of the rotating frame in a front-and-back direction with respect to the rotation axis.

10. The gantry according to claim 1 , wherein the rotating frame is stopped in such a position that brings at least one selected from between the X-ray tube and the X-ray detector into proximity of the air sending mechanism.

11. The gantry according to claim 1 , wherein, when the X-rays finish being emitted from the X-ray tube, the rotating frame is stopped in such a position that brings the X-ray detector into a vicinity of a tilting shaft and into proximity of the air sending mechanism.

12. A gantry comprising:

a rotating frame including an X-ray tube and an X-ray detector configured to detect X-rays emitted from the X-ray tube;

a fixing mechanism configured to support the rotating frame so as to be rotatable on a rotation axis;

a cover configured to cover the rotating frame; and

a shaping mechanism configured to be able to shape an air flow formed by a rotation of the rotating frame, in a front-and-back direction with respect to the rotation axis, wherein

the cover has formed thereon a fin configured, as the shaping mechanism, to be able to shape the air flow formed by the rotation of the rotating frame, in the front-and-back direction with respect to the rotation axis.

13. The gantry according to claim 12 , wherein the fin is formed on at least a bottom face of the cover.