| 摘要 |
A mold box changing apparatus for a concrete block molding machine has a roller type mold box feed line, a split female/male thread type attaching/detaching device constituting a tightening mechanism has a lockable rotary support shaft actuated by a cylinder. The tightening mechanism includes a rotary support shaft capable of rotation by a cylinder pierced into a plunger extending downward from the press. A male thread portion has a split engagement groove disposed at a lower end of the rotary support shaft. The male thread portion has an end face in the form of a first inclination surface cam. A female thread portion has a split engagement groove and provided with a second inclination surface cam corresponding to the first inclination surface cam of said male thread portion such that rotation of said rotary support shaft causes the first inclination surface cam to be contacted, under pressure, with the second inclination surface cam.
|
