Title:
TOOL HOLDER
Document Type and Number:
WIPO Patent Application WO/2012/011178
Kind Code:
A1
Abstract:
The present invention addresses the problem of achieving both the improvement of tool holding stability and the improvement of tool runout accuracy by increasing grip force and expanding a grip region compared to conventional tool holders using either a mechanical chuck or a hydraulic chuck. This tool holder comprises a holder main body (2), a pressurization ring (3), a nut (4) for dragging the pressurization ring, a sleeve (5), a pressure chamber (9) around the outer periphery of the sleeve, a cylinder (10) provided in a trunk part (2b) of the main body, a piston (11) inserted into the cylinder, a connecting passage (12) by which the cylinder (10) communicates with the pressure chamber (9), and an operating fluid sealed in the pressure chamber (9). The rotation operation of the nut (4) allows the pressurization ring (3) to reduce the diameter of a grip tube (2a) and simultaneously operate the piston (11), thereby enabling the holding of the tool by a first tool holding hole (a1) and the holding of the tool by a second tool holding hole (5c) at the same time.
Inventors:
HIROUMI Yoshihisa (7-18, Imazaikecho, Toyonaka-sh, Osaka 42, 〒5610842, JP)
廣海 善久 (〒42 大阪府豊中市今在家町７番１８号 聖和精機株式会社内 Osaka, 〒5610842, JP)
廣海 善久 (〒42 大阪府豊中市今在家町７番１８号 聖和精機株式会社内 Osaka, 〒5610842, JP)
Application Number:
JP2010/062333
Publication Date:
January 26, 2012
Filing Date:
July 22, 2010
Export Citation:
Assignee:
SHOWA TOOL CO., LTD. (4-26, Wakabadai-Minami 7-chome, Tottori-sh, Tottori 12, 〒6891112, JP)
聖和精機株式会社 (〒12 鳥取県鳥取市若葉台南７丁目４番２６号 Tottori, 〒6891112, JP)
HIROUMI Yoshihisa (7-18, Imazaikecho, Toyonaka-sh, Osaka 42, 〒5610842, JP)
聖和精機株式会社 (〒12 鳥取県鳥取市若葉台南７丁目４番２６号 Tottori, 〒6891112, JP)
HIROUMI Yoshihisa (7-18, Imazaikecho, Toyonaka-sh, Osaka 42, 〒5610842, JP)
International Classes:
B23B31/117
Attorney, Agent or Firm:
KAMADA Bunji et al. (18-12, Nipponbashi 1-chome Chuo-ku, Osaka-sh, Osaka 73, 〒5420073, JP)
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Claims: