Title:
PLUNGER POLISHING DEVICE AND POLISHING METHOD FOR HYDRAULIC TYPE ELEVATOR
Document Type and Number:
Japanese Patent JP2015000459
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a hydraulic type plunger polishing device which prevents the occurrence of a lead seam and solves a poor feeling to ride on a hydraulic type elevator by inviting no leakage of oil.SOLUTION: A plunger polishing device for a hydraulic type elevator, which has a main body 1 having a hollow part 1H capable of fitting with the plunger, a polishing member 2 provided on the side of the hollow part 1H of the main body 1 to polish the outer peripheral surface of the plunger, and a compression spring 8 for pressing the polishing member 2 on the plunger, comprises separation means consisting of a roller 5 provided on the inner peripheral surface of the hollow part 1H to come in contact with the outer peripheral surface of the plunger, and to make following rotation in response to the vertical motion of the plunger, a crank shaft 6 for separating the polishing member 2 from the outer peripheral surface of the plunger by resisting the pressing force of the compression spring 8 in response to the rotation of the roller 5, crank parts 6a, 6b, a roller pull-up part 9, and a pull-up rod contact part.
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Inventors:
FUJITANI KENICHI
Application Number:
JP2013126870A
Publication Date:
January 05, 2015
Filing Date:
June 17, 2013
Export Citation:
Assignee:
HITACHI BUILDING SYS CO LTD
International Classes:
B24B5/00; B66B9/04
Attorney, Agent or Firm:
Patent business corporation Takekazu international patent firm