PURPOSE: To obtain a multistage type flush bolt device capable of changing the projecting length of a shaft rod at several steps and having excellent operability.
CONSTITUTION: An arcuate notch 1b is formed to the flange section 1a of a support base body 1 while indentations 1c are formed to said arcuate notch 1b at regular intervals at three positions or more in the longitudinal direction of an arc. On the other hand, a flush bolt shaft rod 3 is attached pivotally at the front end section of a control lever 4, in which a lever shaft 4c at a central section is bonded pivotally to a support frame 2. An engaging pin 5 slid along the arcuate notch 1b formed to the support base body 1 with rotary operation centering around the lever shaft 4c and capable of being engaged with the indentations 1c is fitted movably on the base end section side of the control lever 4, and the engaging pin 5 is energized to the arcuate notch 1b side by a pushing spring 6.
SHOJI TATSUO
SHIMURA SEIJI
