Strut height adjusting apparatus

摘要

A strut height adjusting apparatus for adjusting the height of a strut automatically and for simultaneously measuring the height of a floor while making it possible to check the perpendicularity of the strut with a warning sound or an indication. The strut height adjusting apparatus includes a light receiving unit (5) for receiving a laser beam for use in setting a hypothetical level what is vertically movably fitted in a hollow body (23), a pointer (32) provided for the light receiving unit and a scale plate member (35) for indicating the position of the pointer (32). The lower end of a rotary unit is set upright in such a way that it abuts against a floor to be examined. The light receiving unit (5) is moved up and down so that the laser beam from a laser beam emitter may be received at the centre of the light receiving unit. The height of the floor can be measured by reading graduations on the scale plate member (35) as indicated by the pointer (32). Moreover, the level measuring means is formed with a buzzer (47) for advising of inclination of the hollow body when a moving member (3a) and an outer peripheral member (42) contact and conduct. When the hollow body (23) is inclined, the buzzer (47) operates to inform that it is inclined by sound.