JPH0219407U

JPH0219407U -

Info

Publication number: JPH0219407U
Application number: JP9938988U
Authority: JP
Priority date: 1988-07-26
Filing date: 1988-07-26
Publication date: 1990-02-08

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す側断面図である
。第２図は従来例を示す側断面図である。１：コレツト、２：チヤツク部、３：主軸、４
：シフター、５：ドローバー、６：基準がね、７
：固定パイプ、８：シールハウジング、９：圧力
検出器、３１：回転面盤、２３，３２，６２，８
２：導入孔、８１：リング溝。 FIG. 1 is a side sectional view showing an embodiment of the present invention. FIG. 2 is a side sectional view showing a conventional example. 1: Collet, 2: Chuck part, 3: Main shaft, 4
: Shifter, 5: Drawbar, 6: Standard, 7
: Fixed pipe, 8: Seal housing, 9: Pressure detector, 31: Rotating surface plate, 23, 32, 62, 8
2: Introduction hole, 81: Ring groove.

Claims

[Claims for Utility Model Registration] (1) A chuck portion that is fixed to the main shaft of a machine tool and has a tapered portion on its inner circumferential surface, and a tapered portion on its outer circumferential surface that fits into the inner circumferential surface of the chuck portion. a drawbar which is fixed to the inner diameter side of the chuck portion and which is fixed to the inner diameter side of the chuck portion and which is coupled to a shifter that engages with the main shaft and is movable in the axial direction. In a workpiece seating confirmation device, the workpiece seating confirmation device is equipped with a reference piece provided so as to come into contact with the workpiece gripped by the collet, and an air introduction hole that opens on the reference surface of the reference piece. A hollow fixed pipe is provided on the inner diameter side of the drawbar, and a seal housing is provided that is fixed to the machine tool body and is in contact with the rotary surface plate so as to be able to slide thereon, and the seal housing is provided with a hollow fixed pipe on the inner diameter side of the drawbar. A workpiece seating confirmation device characterized in that an introduction hole communicating with a pressure detector and an introduction hole provided in a reference ring are connected via an introduction hole provided in a chuck and a rotary face plate. (2) The workpiece seating confirmation device according to claim 1, wherein one end of the fixed pipe is supported by a bearing provided on the reference frame.