| 摘要 |
When a seal (10) with a lip (10A) is slid onto a shaft (14), the seal (10) is first slid from a D-cut portion (14C) to the end of a shaft body (14B) contiguous to the D-cut portion (14C), and then is slid at a first speed (at 40 mm/s) from this end to a position in which the seal (10) does not come into contact with a large-diameter portion (14A) of the shaft (14). Since there is a strong possibility that the lip (10A) of the seal (10) will have been completely curled at this time. the seal (10) is pulled out at a second speed (at 10 mm/s) on the shaft body (14B) from this position toward the D-cut portion (14C), and the seal (10) is again slid inward at a third speed (at 70 mmls) from this position to an appropriate position. Thus, the seal (10) is slid without the lip (10A) being curled. The sliding operations at the second and third speeds may be performed a plurality of times. Another way of sliding the seal (10) without the lip (10A) being curled is to slide the seal (10) onto the shaft (14) while rotating the shaft (14) and the seal (10) relatively with each other. Additionally, if the shaft (14) and the seal (10) are rotated relatively with each other while positioning the seal (10) at the D-cut portion (14C), the lip (10A) can be uncurled.
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