TOOL POSITIONING STRUCTURE AND WORKING MACHINE

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EP 1 070 563 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	published in accordance with Art. 158(3) EPC

(48)	Corrigendum issued on:
	07.05.2003 Bulletin 2003/19

(43)	Date of publication:
	24.01.2001 Bulletin 2001/04

(21)	Application number: 99939174.1

(22)	Date of filing: 12.03.1999

(51)	International Patent Classification (IPC)⁷: B23B 29/034, B23B 39/00

(86)	International application number:
	PCT/JP9901/196

(87)	International publication number:
	WO 9904/6074 (16.09.1999 Gazette 1999/37)

(84)	Designated Contracting States:
	CH DE FR GB IT LI

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Priority:

12.03.1998 JP 10325198

(71)	Applicants:
	NT Engineering Kabushiki Kaisha Takahama-shi, Aichi-ken 444-1335 (JP) Masuda, Yukio Ichikawa-shi, Chiba-ken 272-0114 (JP)

(72)	Inventors:
	MASUDA, Yukio Ichikawa-shi Chiba 272-0114 (JP) KOMAI, Yasuhiro NT Engineering Kabushiki Kaisha Takahama-shi Aichi 444-1335 (JP)

(74)	Representative: Borchert, Uwe Rudolf, Dipl.-Ing.
	Patentanwalt Puschmann & Borchert Patentanwälte European Patent Attorneys Postfach 10 12 31 80086 München 80086 München (DE)

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References cited: :

(54)	TOOL POSITIONING STRUCTURE AND WORKING MACHINE

(57) To make it possible to carry out tool position adjustment automatically with high accuracy.
A tool holder 10 is, on one end thereof, fixed on a shank 12 and has, on the other end thereof, a housing 16 whereon a tool 14 such as a boring bar is mounted on the side thereof, a drive mechanism 18 that imparts a force to rotate around the center axis of the shank 12, and a rotating force conversion mechanism 20 that is capable of adjusting the position of the tool 14 in the radial direction by converting the rotating force into linear motion in only one direction among radial directions of the shank 12.