| 摘要 |
The shape of the outer circumference of a guide roller is controlled to be dynamic. The guide roller (10) comprises an outer roller (12) with an axis (AX1) and an inner roller (14) inserted into the outer roller (12) having an axis (AX2) overlapped on the axis (AX1). The outer roller (12) includes a plurality of slits (SL1-SL3) formed on the outer circumference (PR11). The inner roller (14) includes a plurality of holes (HL1a-HL3a, HL1b-HL3b) continued from the outer circumference (PR21) to a cavity unit at positions separated from the plurality of slits (SL1-SL3) in a radial direction. The plurality of holes (HL1a-HL3a, HL1b-HL3b) are surrounded by ring-shaped grooves (GR1a-GR3a, GR1b-GR3b). The plurality of slits (SL1-SL3) are formed on the outer side of the ring-shaped grooves (GR1a-GR3a, GR1b-GR3b). The outer circumference (PR11) of the outer roll (12) is in contact with an object to be returned to guide the object. |
