Abstract: A wheel device and a chair equipped with the same which do not require replacement of a conventional retractable wheel, but instead enable the wheel to be placed in the operating state at all times, as required. The wheel device comprises a wheel and a holder member for holding the wheel. An urging member is arranged between the wheel and the holder member to constantly urge the wheel to be projected in an operable position. A retraction permitting member is adapted to permit the wheel to be retracted while overcoming the urging force of the urging member when a load is exerted in the direction of gravity on a member on which the wheel is mounted. The retraction permitting member includes a setting mechanism for setting the wheel to be in an un-retractable state. The chair is equipped with the wheel devices mounted to a leg portion thereof.

Abstract: Socks having a rib top part, a leg part, a heel part, a foot part and a toe part which are knitted in order wherein first gore lines extending obliquely downwardly from upper portions of the heel part to rear portions of the heel part are formed on the heel part next to the leg part from first and second trapezoidal knit fabrics whose top sides are common to each other, and a third trapezoidal knit fabric having a top side whose length is equal to the length of a bottom side of the second trapezoidal knit fabric at portions of the first gore lines rather near to the toe part is knitted next to the second trapezoidal knit fabric. Further, a fourth trapezoidal knit fabric is knitted continuously to the bottom side of the third trapezoidal knit fabric, and second gore lines are formed between the bottom side of the third trapezoidal knit fabric and inclined sides of the fourth trapezoidal knit fabric of the socks.