| 摘要 |
PURPOSE:To enable an extremely thin aluminum wire or the like to be automatically supplied without any damage by hanging a wire detecting shaft with two hanging wires to supply the wire when the wire unwound from a drum contacts the detecting shaft. CONSTITUTION:A wire 21 around a wire reel 8 is supplied to a wire bonding device through spaces between a wire supply roller 10 and a holding roller 11, between two wire guides 14 and between a wire detecting shaft 18 and a stop detecting plate 19. When the wire 21 is consumed by the bonding device to lose its sag, the wire 21 contacts the wire detecting shaft 18 hung by two hanging wires 17. Then, current flows from a contact A on a roller shaft 28 through the roller 10, wire 21, detecting shaft 18, hanging wire 17 and a contact B on a mounting shaft 16 to an ammeter 23 so that a motor 9 is rotate to supply the wire 21 until the wire 21 contacts the stop detecting plate 19. |
