shown in fig5 subsequently the lifting plate 4 pushing the weft 7 upward is lowered then the upper hook 1 is rotated one and a half rotations to the left so that the warp 8 forms a loop 8 a as shown in fig6 and 7 as a result of the one and a half leftward rotations of the upper hook 1 the upper hook 1 twists the loop 8 a of the warp 8 consequently the position of the upper hook 1 in fig5 changes to that shown in fig7 next as shown in fig8 an under hook 9 is passed through the loop 8 a from the side where the shuttle 6 is located in this position the read 5 is moved up and down left and right or forward and backward until the middle of the warp 8 is hooked around the hook 9 a of the under hook 9 with the hook 9 a having passed through the loop 8 a as shown in fig8 subsequently as shown in fig9 with the middle of the warp 8 hooked around the hook 9 a the under hook 9 is drawn such that the middle of the warp 8 is passed through the loop 8 a and pulled toward the shuttle 6 subsequently as shown in fig1 the under hook 9 is.