SIMULTANEOUS BIAXIAL DRAWING MACHINE AND DRAWING SYSTEM

To provide a simultaneous biaxial drawing machine capable of suitably adjusting the number of holding jigs in a forward path.SOLUTION: A main quantity control unit 77d performs speed control to make an entrance speed Vat which an entrance drive unit 61I drives a holding jig 21 and the exit speed Vat which an exit drive unit 61O drives the holding jig 21 equivalent. In a state where the speed control is performed, when a ratio of the force Fof the exit drive unit 61O driving the holding jig 21 to the force Fof the entrance drive unit 61I driving the holding jig 21, F/F, exceeds an allowable upper limit, the ratio V/Vis temporarily reduced to increase the number of the holding jigs 21 in a forward path 27a from the entrance drive unit 61I to the exit drive unit 61O. If the ratio F/Ffalls below a predetermined allowable lower limit, the ratio V/Vis temporarily increased to reduce the number of the holding jigs 21 in the forward path 27a.SELECTED DRAWING: Figure 11 【課題】往路における保持具の数を好適に調整できる同時二軸延伸機を提供する。【解決手段】主個数制御部７７ｄは、入口駆動部６１Ｉが保持具２１を駆動する入口速度ＶＩＮと出口駆動部６１Ｏが保持具２１を駆動する出口速度ＶＯＵＴとを同等にする速度制御が行われている状態で、入口駆動部６１Ｉが保持具２１を駆動する力ＦＩＮに対する出口駆動部６１Ｏが保持具２１を駆動する力ＦＯＵＴの比ＦＯＵＴ／ＦＩＮが許容上限を超えたときは、比ＶＯＵＴ／ＶＩＮを一時的に小さくして入口駆動部６１Ｉから出口駆動部６１Ｏまでの往路２７ａ内における保持具２１の数を増やし、比ＦＯＵＴ／ＦＩＮが所定の許容下限を下回ったときは、比ＶＯＵＴ／ＶＩＮを一時的に大きくして往路２７ａ内の保持具２１の数を減らす。【選択図】図１１