The following are provided: an oil-collection container; an oil funnel that guides a lubricating oil into an oil channel that is open at the end of a rotary shaft; and an oil-channel member that connects the oil funnel to the oil-collection container. Said oil-channel member has a first channel member that extends from the oil-collection container and a second channel member that extends from the oil funnel. An elongated insertion hole is formed in a side wall of one end of the second channel member, and one end of the first channel member is cylindrical. Said cylindrical end is inserted into the insertion hole so as to be able to move in and out in the axial direction of said cylindrical end. The cylindrical end is also made able to rotate about its own axis and move in the long direction of the insertion hole. This allows relative movement between the oil-collection container and the oil funnel in the axial direction of the rotary shaft and the radial direction of the oil funnel (circular disc part) and also absorbs deformation forces caused by variability in the dimensions of the lubricating-oil collection guide.