| 摘要 |
PROBLEM TO BE SOLVED: To prevent the lowering of seal performance caused by the settling of a material, in a dust seal device.SOLUTION: A dust seal device comprises a dust seal main body 1 which is attached to an annular groove 113 formed at an internal peripheral face of an external peripheral member 110. The dust seal main body 1 comprises a dust lip 12 which slidably and closely contacts with an external peripheral face of an internal peripheral face member 120 which is relatively and movably inserted into an internal periphery of the external peripheral member 110 in an axial direction, and whose tip closely contacts with an inside face of the annular groove 113. A pressurization hole 22 which can pressure-insert grease G into a sealed space S3 between the dust lip 12 and the annular groove 113 is opened at the external peripheral member 110, and a plug member 3 which holds the grease pressure of the sealed space S3 is attached to the pressurization hole 22. |
