JP2018053587A5 - - Google Patents

Claims (15)

A braking device that applies a braking force to a cord, comprising: first and second clamping members that clamp the cord; and a holding member that holds the first narrowing member;
The first narrowing member is configured to sandwich the cord together with the second sandwiching member by moving relative to the holding member with the longitudinal movement of the cord,
The braking device further comprising a friction reducing member that is disposed between the axial end surface of the first narrowing member and the holding member and reduces friction between them.   The braking device according to claim 1, wherein the first narrowing member is a rotating body.   The braking device according to claim 1, wherein the first narrowing member includes a roller portion formed of an elastic body.   The braking device according to claim 3, wherein the friction reducing member is formed of a material having a hardness higher than that of the roller portion.   The braking device according to claim 3 or 4, wherein the friction reducing members are respectively disposed on both end sides in the axial direction of the roller portion.   The braking device according to claim 1 or 2, wherein the first narrowing member is configured to move along a predetermined movement locus in accordance with movement of the cord in the longitudinal direction.   The braking device according to any one of claims 1 to 6, wherein the first narrowing member is configured to move in a direction perpendicular to the axial direction of the first narrowing member.   The braking device according to any one of claims 1 to 7, wherein the holding member is configured to restrict movement of the first narrowing member in an axial direction. The first clamping member comprises a shaft;
The said 1st clamping member is comprised so that it may be moved with the movement locus | trajectory along the control groove | channel which controls the movement of the said shaft with the movement of the longitudinal direction of the said code | cord | chord. A braking device according to claim 1.   The braking device according to claim 9, further comprising a housing that houses at least a part of the first narrowing member, wherein the restriction groove is formed in the housing.   11. The first narrowing member according to claim 1, further comprising a resistance imparting portion that is rotatable with the movement of the cord in the longitudinal direction and that provides rotational resistance to the first narrowing member. The braking apparatus in any one.   The braking device according to any one of claims 1 to 11, wherein the first narrowing member is disposed such that an axis of the first narrowing member faces a substantially vertical direction.   The holding member is movable with respect to the case of the braking device along with the movement of the cord. When the holding member moves in one direction, the first narrowing member moves in a direction approaching the cord. The braking device according to any one of claims 1 to 12, wherein the first narrowing member moves in a direction away from the cord when the holding member moves in the other direction.   The braking device according to any one of claims 1 to 12, wherein the holding member is a case of the braking device.   The braking device according to any one of claims 1 to 14, wherein the friction reducing member is a ring-shaped member that is passed through a shaft included in the first narrowing member.