| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce operation force that gradually increases when opening a sash in a fully closed state, in an indoor sliding door equipped with a soft closing mechanism.SOLUTION: The operation force reducing device includes: a large-diameter pulley 2 and a small-diameter pulley 3 rotated around a first thickness direction axis G1; a swing piece 4 swung around a second thickness direction axis G2 more on a door end side than the first thickness direction axis G1 to appear and disappear from a door end C of a sash D1; a first rope 11 whose one end 11A is hooked to the pulley 2 and the other end 11B is hooked to an operation piece H; a second role 12 whose one end 12A is hooked to the pulley 3 and disposed to the rear side of a direction conversion pulley 5 rotated around a third thickness direction axis G3 on a door tail side of the swing piece 4, and the other end 12B is hooked to a door end part; and a tension coil spring 6 for performing energization to the back in the state where the swing piece 4 is projected. When the operation piece H is operated and the first rope 11 is pulled, the pulleys 2 and 3 are turned, and the swing piece 4 is projected from the door end C of the sash D1 by tension of the second rope 12 wound by the pulley 3. |
