Abstract: A particle beam treatment apparatus includes an irradiator that has an irradiation nozzle which irradiates an irradiation target with a particle beam and that is capable of moving rotationally in a vicinity of the irradiation target, a moving floor that extends on an annular trajectory surrounding the irradiation target along a rotation circumferential direction of the irradiator and that is movable on the annular trajectory depending on a position of the irradiator, a movable cover that is supported pivotably with respect to the irradiator or the moving floor and that covers a gap between the irradiator and the moving floor, and an adjusting mechanism that adjusts a pivoting position of the movable cover depending on the position of the irradiator such that a gap between the movable cover and the moving floor is covered.

Abstract: There is provided a lubricant feed mechanism capable of improving the mechanical efficiency of a supercharger. A lubricant feed mechanism for feeding lubricants to an engine and a supercharger mounted on the engine includes a block-side oil passage for feeding the lubricant to a cylinder block of the engine, a block-side oil pan that is disposed in a path of the block-side oil passage and stores the lubricant flowing through the block-side oil passage, a head-side oil passage for feeding the lubricant to the supercharger, and a head-side oil pan that is disposed in a path of the head-side oil passage and stores the lubricant flowing through the head-side oil passage, the block-side oil passage and the head-side oil passage being configured to be independent of each other.