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Patent Searching and Data


Title:
DIAMETER REDUCTION DEVICE
Document Type and Number:
Japanese Patent JP2017080750
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a diameter reduction device capable of excellently changing an outer diameter of a diameter reduction object without biting in a part of the diameter reduction object.SOLUTION: An opening part 4b is constituted by combining tip parts 4a of a plurality of top bodies 4, and is constituted so as to change an inner diameter of the opening parts 4b by moving in the radial direction by coordinating the tip parts of the plurality of top bodies 4 by rotating the plurality of top bodies 4 around respective fulcrum support pins 8 by rotating a driving ring 6a. When setting a diameter of a circle of connecting the centers of the plurality of fulcrum support pins 8 as PCD, the fulcrum support pins 8 are installed in the driving ring 6a and auxiliary rings 6b and 6c so that the PCD changes.SELECTED DRAWING: Figure 8

Inventors:
KODAMA NAOKI
Application Number:
JP2015208892A
Publication Date:
May 18, 2017
Filing Date:
October 23, 2015
Export Citation:
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Assignee:
NIPPON ZEON CO
International Classes:
B21D41/04; B25B7/04
Attorney, Agent or Firm:
Maeda/Suzuki International Patent Corporation