A PREFABRICATED MANHOLE WHICH IS IS POSSESSED OF THE ROLL-REGULATION PORTION WITH BALL CASTER

摘要

PURPOSE: A prefabricated manhole with a ball caster type roll control unit is provided to simply and rapidly perform a construction process of the manhole, and to continuously reuse multiple roll control units. CONSTITUTION: A prefabricated manhole(1) with a ball caster type roll control unit comprises a lower bottom supporter(2) and an upper manhole assembly(28). The lower bottom supporter is placed on the excavated ground that the manhole is installed. Multiple roll control units(6) are installed on the top of the lower bottom supporter. The upper manhole assembly is located on the top of the lower bottom supporter. The location of the upper manhole assembly is easily moved back and forth by the roll control units.