| 摘要 |
PCT No. PCT/JP91/01391 Sec. 371 Date Jun. 10, 1992 Sec. 102(e) Date Jun. 10, 1992 PCT Filed Oct. 11, 1991 PCT Pub. No. WO92/06813 PCT Pub. Date Apr. 30, 1992.A wire feed device for a wire cut electric spark machine in which a wire is delivered from a wire bobbin in the direction orthogonal to the axis of the wire bobbin to prevent a "jump" of the wire as well as a fluctuation in wire tension arising from the jump, and which can reduce a space required for the arrangement thereof, includes a roller intervening between a wire bobbin with a wire accumulatively wound therearound, and a guide roller. The intervening roller is adapted to reverse the delivery direction of the wire sent from the wire bobbin toward the guide roller, and presents an outer peripheral surface having surface capable of not only confining at all times a wire delivery angle within a predetermined angle regardless of a wire delivery position, but also maintaining the same length of the wire extending from the wire delivery position, via the intervening roller, up to the guide roller.
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