Title:
縮径装置
Document Type and Number:
Japanese Patent JP6878769
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a diameter contraction device capable of preferably contracting a diameter of a diameter contraction object having a relatively high outer diameter with neither biting of a part of the diameter contraction object, nor interference of top bodies with each other.SOLUTION: Tips 4a of a plurality of top bodies 4 are combined to constitute an opening 4b. The plurality of top bodies 4 turn on the fulcrum support pins 8 by rotating a ring 4a, so that the tips of the plurality of top bodies 4 move radially by interlocking to make the inner diameter of the opening 4b change. The first intersection angle (θ1) between a virtual straight line from the center of a fulcrum support pin 8 to the tip of a top body 4 held by the fulcrum support pin 8 and the first tip end face is 9 degrees or more.SELECTED DRAWING: Figure 8
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Inventors:
Nozuka Shizuka
Yuki Shinagawa
Yuki Shinagawa
Application Number:
JP2016072822A
Publication Date:
June 02, 2021
Filing Date:
March 31, 2016
Export Citation:
Assignee:
Zeon Corporation
International Classes:
B21G3/14; A61F2/95; B21D41/04; B25B7/04
Domestic Patent References:
| JP2014523294A | ||||
| JP2013503016A |
Foreign References:
| US20020138966 | ||||
| US20040128818 |
Attorney, Agent or Firm:
Maeda/Suzuki International Patent Corporation