SPRING BALANCER AND ITS DISASSEMBLING METHOD

To easily disassemble with a simple jig without using a press.SOLUTION: A spring balancer 1 comprises: a first flange member 19 in which a flange 17 with a through hole 22 penetrating a shaft 3 is arranged inward in the radial direction of a compression spring 18, and detachably held at the other end of the shaft by a first nut member 16 fastened to a first male screw 15 of the shaft; a second flange member 20 which includes a center hole 23 through which the first nut member is penetrated, and is detachably fixed at an outer peripheral edge of the first flange member from a rear end plate 6 side by fasteners; an abutment part 10 butted to the outer peripheral edge of the second flange member in the rear end plate side of a casing 2; and an aperture 11 given inward in the radial direction compared with the abutment part and outward in the radial direction compared with the center hole to expose the surface of the second flange member to the outside, in which at least one of a front end plate 5 and the rear end plate of the casing is detachably attached to a cylindrical body 4 of the casing.SELECTED DRAWING: Figure 2 【課題】プレス機を用いることなく、簡易な冶具により容易に分解する。【解決手段】フランジ１７が、シャフト３を貫通させる貫通孔２２を備えるとともに、圧縮ばね１８の径方向内方に配置され、シャフトの第１雄ねじ１５に締結される第１ナット部材１６によって、シャフトの他端に着脱可能に保持される第１フランジ部材１９と、第１ナット部材を貫通させる中央孔２３を有するとともに、第１フランジ部材の外周縁に締結具によって後端板６側から着脱可能に固定された第２フランジ部材２０とを備え、ケーシング２の後端板が、第２フランジ部材の外周縁を突き当てる当接部１０と、当接部よりも径方向内方かつ中央孔よりも径方向外方において第２フランジ部材の表面を外部に露出させる開口部１１とを備え、ケーシングの前端板５および後端板の少なくとも一方が、ケーシングの筒体４に着脱可能に取り付けられているばねバランサ装置１である。【選択図】図２