French dropper and French dropping with this accessory

摘要

PROBLEM TO BE SOLVED: To provide a flush bolt receiver and a flush bolt provided with the receiver that allow a drop bar of the flush bolt to be fitted smoothly and prevent entry of a waste, dust, sand, etc., even in a case of erroneous fitting between the drop bar on a flush bolt body and the receiver.SOLUTION: A flush bolt includes: an external cylinder member of a bottomed cylindrical form fit into a recess formed on a surface of installation; and an inner cylinder member inserted and fit coaxially and rotatably in the external cylinder member, the internal cylinder member having a through-hole into which a tip of a drop bar of a flush bolt body may be inserted, at a location deviating from the axis of the external cylinder member. The inner cylinder member has, in the through-hole, a cover that closes an opening on an upper side of the through-hole, an elastic body that energizes the cover toward the opening on the upper side of the through-hole, and support means that comes in contact with a lower edge of the elastic body for fixing and supporting the elastic body.SELECTED DRAWING: Figure 1