To enable stacking multiple chairs horizontally by means of an drastically little seat movement amount by constituting the rear end part of the seat so as to be lifted up till a position where it does not interfere with another chair seat by means of the front edge or the upper surface of the seat of another chair which comes from a rear part at the time of stacking.
A leg 1 consists of a pair of a front leg element 11 and a rear leg element 13 in the chair which is horizontal stacking possible by permitting the seat 4 to approach from a back and forth direction. A tortion bar 3 is insesrted to the inside of a crosspiece material 12 and a back 2 is operated by backward inclination around the axial center m of the tortion bar 3 when the back 2 which is supported in the leg 1 so as to be backward inclination possible is inclined backwards. Then, when the loading of the back 2 is removed, the tortion bar 3 discharges repulsion force so as to rotate and energize theh back 2 forewards so that the lower surface of the seat 4 of the front part chair is lifted up by the front edge or the upper surface of the seat of the rear part chair. Then, the pin 51 of a link material 5 lifts up the rear end part 4b of theh seat 4, an evacuation is executed till the position to have a foreward inclination posture and horizontal stacking is executed.
UEDA NOBUYUKI
KUBOTA NOBUHISA
TANAKA YOSHIKAZU
ITOU SAKUJI
TAKANO CO LTD