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|1. (WO2018043045) LINEAR MOTION DEVICE|
|Applicants:||NIPPON BEARING CO., LTD.
|Title:||LINEAR MOTION DEVICE|
Provided is a linear motion device having higher rigidity, higher load resistance, and excellent guiding precision. A linear motion device in which a linearly moving element 2 that moves linearly in relation to a rail body 1 is provided, a load path 4 through which rolling elements 3 move is provided between the rail body 1 and the linearly moving element 2, and a rolling element endless circulation path is formed by which the load path 4 communicates with a no-load path 6 via a return path 5, wherein: the rolling elements 3 are cylindrical objects of which the length is at least three times the diameter, the rolling elements 3 being configured so as to circulate through the rolling element endless circulation path in a state of being rotatably held by a rolling element holder 10, which is configured from spacers 8 provided between adjacent rolling elements 3 and a band-shaped linking element 9 that links the ends of the spacers 8; and the no-load path 6 is formed by installing a no-load path constituent member 12 in a linear hole 11 formed through the linearly moving element 2, the no-load path constituent member 12 being configured such that the outer sides of the end surfaces of the rolling elements 3 are opened and the linking element 9 of the rolling element holder 10 is exposed.