PROBLEM TO BE SOLVED: To suppress breakage of a ratchet device.SOLUTION: A ratchet device 2 comprises: a rotatable output member (input side rotary member 40) having a load input face (inner peripheral surface 41A); an operation input member 50 which has an action face 55 which is not parallel to the load input face, and which is oscillation operable; and a movable piece (roller 72) which is located between the load input face and the action face 55. The ratchet device is so configured that when an input torque is inputted to the operation input member 50 in the case that a load applied to the output member is less than a prescribed value, the operation input member 50 and the output member are integrally rotated according to oscillation motion of the operation input member 50. The operation input member 50 has a projection 54 which projects so as to approach the load input face from the action face 55. The ratchet device 2 is so configured that when an input torque of a prescribed value or more is inputted to the operation input member 50 in the case that a load applied to the output member is the prescribed value or more, the projection 54 contacts and pushes the movable piece, whereby the movable piece is slid with respect to the load input face.SELECTED DRAWING: Figure 10
【課題】ラチェット装置の破損を抑制する。【解決手段】ラチェット装置2は、荷重入力面(内周面41A)を有する回転可能な出力部材(入力側回転部材40)と、荷重入力面と非平行な作用面55を有し、揺動操作可能な操作入力部材50と、荷重入力面と作用面55の間に配置される可動片(ローラ72)を備え、出力部材に掛かる負荷が所定未満である場合に、操作入力部材50に入力トルクが入力されると、操作入力部材50の揺動動作に応じて操作入力部材50と出力部材が一体に回転するように構成される。操作入力部材50は、作用面55から荷重入力面に近づくように突出した突出部54を有する。ラチェット装置2は、出力部材に掛かる負荷が所定以上である場合に、操作入力部材50に所定以上の入力トルクが入力されると、突出部54が可動片に接触して可動片を押すことで可動片が荷重入力面に対して滑るように構成される。【選択図】図10
RATCHET DEVICE
ラチェット装置
2018-09-20
Patent
Electronic Resource
Japanese