PURPOSE: To improve the workability by stacking and conveying rail installing plates divided into plural members and a bellows-form house and running and developing the bellows-form house on the developed and connected rail installing plates when they are assembled.

CONSTITUTION: A rail installing plate 1 which consists of a light weight material furnished with rails at both sides is formed, and it is divided into plural members of almost the same form. Then, a bellows-form house 2 which consists of a hood 9 made by suspending a flexible sheet over arc-form moveble core bodies 7 furnishing casters 6 at the lower ends, and side plates 10 furnishing doors, is formed. And when it is conveyed, the house 2 is folded and loaded on the superposed installing plates 1. And when it is assembled, the upper side plates 1 are moved horizontally and lined up on the ground, and the rails 4 are made in a straight line and connected each other. And the house 2 is erected and run on the rails 4, and the front and the rear ends are fixed by locking pins 12. Consequently, the house can be made compact and conveyed simply, and can be assembled and disassembed simply, and furthermore, the installing plates can be used as a floor board, and the hood can be protected in the conveying time.