| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating oil circulation mechanism foir a guiding mechanism which does not need a driving source such as a separate pump or motor.SOLUTION: A lubricating oil circulation mechanism 1 for a guiding mechanism includes a guiding mechanism 2a comprising a cylinder 4 and a guide rod 5 slidable to the cylinder for guiding elevation of a slide 23 of a press device 16 by relative reciprocation thereof, and a circulation circuit 3 for supplying lubricating oil 7 to a gap 6 between the cylinder and the guide rod and recovering the supplied lubricating oil. The guide rod includes a large diameter part 5b having a small gap with the cylinder, and a small diameter part 5c whose diameter is smaller. The gap between the guide rod and the cylinder 9 is set with oil tightly near both ends of the cylinder. A closed oil reservoir 9 is formed in the gap. The large diameter part and the small diameter part alternately enter into or exit from the oil reservoir following the up/down of the slide to increase/decrease the volume of the oil reservoir. The lubricating oil is sucked from the circulation circuit by the increase of the volume, and discharged to the circulation circuit by the decrease. |
