warper 200 of the present invention comprises a warper drum 202 and a plurality of yarn guides 6 a to 6 h in this illustrated example the number of the yarn guides is eight but actually yarn guides of the same number as the total number of bobbins are used for example if the number of bobbins is sixteen the number of yarn guides is sixteen each rotatably mounted on a side surface of the warper drum 202 for winding yarns 22 on the warper drum 202 a yarn selection device 27 for a rotary creel provided with a plurality of yarn selection guides which are in correspondence with the yarn guides each of the yarn selection guides being pivotally moved to a yarn exchanging position when exchanging yarns and retract to a standby position when storing yarns and a multi shaft rotary creel 206 having a plurality of bobbins 146 on which different kinds and or the same kind of yarns 22 have been wound and installed in correspondence with the yarn selection device 27 wherein yarns 22 are automatically exchanged and successively wound on the warper drum 202 according to a preset yarn order by passing the yarns 22 between the yarn guides 6 a to 6 h and the yarn selection guides of the yarn selection device 27 incidentally the basic structure and function of the sample warper 200 are broadly known from the above described patent documents and the like and detailed explanation thereof will be omitted reference numeral 17 denotes a conveyor belt movably mounted on a circumferential surface of the warper drum 202 a.