PROBLEM TO BE SOLVED: To provide a body weight supporting device generating sufficient supporting force when a person stands up from a kneeling posture or a crouching posture and not-interrupting the walking greatly.SOLUTION: This body weight supporting device A includes a leg link 3 which has an upper-side link member 5 connected to a seating portion 1 and a lower-side link member 7 connected to a foot-worn portion 2, and the upper-side link member 5 and the lower-side link member 7 are bendably/stretchably connected by a third joint 8. The leg link 3 is provided with a coil spring 14 adapted to impart, to the third joint 8, first urging force for restraining the flexion degree of the leg link 3 from decreasing due to the gravity acting on the body weight supporting device A when the flexion degree of the leg link 3 is a predetermined degree or lower, and to impart, to the third joint 8, second urging force greatly increasing more than the first urging force according to the increase in the flexion degree, when the flexion degree of the leg link exceeds the predetermined degree, and then reducing the flexion degree.COPYRIGHT: (C)2010,JPO&INPIT【課題】中腰姿勢やしゃがみ込み姿勢から立ち上がるときに充分な支持力を発生することが可能であり、且つ、歩行が大きく妨げられない体重支持装置を提供する。【解決手段】体重支持装置Aは、着座部1に連結された上側リンク部材5と、足平装着部2に連結された下側リンク部材7と備える脚リンク3を有し、上側リンク部材5と下側リンク部材7とが第3関節8により屈伸自在に連結されている。脚リンク3の屈曲度合が所定度合以下の場合、当該体重支持装置Aに作用する重力に起因して脚リンク3の屈曲度合が減少することを阻止する第1付勢力を第3関節8に付与し、脚リンク3の屈曲度合が前記所定度合を超えた場合、第1付勢力より大きく、該屈曲度合の増加に応じて増加し、当該屈曲度合を減少させる第2付勢力を第3関節8に付与するコイルバネ14を脚リンク3に設けた。【選択図】図1
