To increase work safety in a minimum space by providing a connecting rail supporting beam in a connecting rail fitted between the ends of a carrier rail, setting its length larger than a carrier width and retreating a connecting rail supporting beam by a truck.
One part of a carrier rail 10 is cut off and a connecting rail 12 is attached between the ends thereof away from each other so as to be detached. A pair of back and forth connecting rail supporting beams 14 for vertically setting the connecting rail 12 are fixed to the upper surface of the same. Each of the connecting rail supporting beam 14 is formed to have a length larger than the width of a carrier C, and the connecting rail 12 where the carrier C enters is supported from the lower side so as to allow the carrier C and the connecting rail 12 to be removed. Further, a connecting rail supporting base 16 for supporting the connecting rail supporting beam 14 is mounted on a truck 18 by a pantograph jack 20 so as to be freely moved vertically. In this case, the supporting base 16 has four projecting supporting pillars 22 and supports the connecting rail supporting beam 14.
ASANO AKIO
KANEDA KENGO
