DOLLY COUPLING TOOL

PROBLEM TO BE SOLVED: To stack a plurality of dollies in a certainly fixed condition. SOLUTION: Each dolly 20 has grooves 30 and 32 at the outer edges of its load carrying platform 24, and the arrangement comprises a base 12 arranged between the load carrying platforms vertically stacked of a plurality of dollies 20, an upper projection 14 formed on the upper surface of the base 12 and fitted in the outer edge grooves 30 and 32 of the upper placed load carrying platform 24 in such a way as removable in the vertical direction, and a lower projection 16 formed on the undersurface of the base 12 and fitted in the outer edge grooves 30 and 32 of the lower placed load carrying platform 24 in such a way as removable in the vertical direction. The upper projection 14 has a section shape able to be fitted in the outer edge grooves 30 and 32 of the dolly 20 in such a way as removable in the vertical direction, wherein the height from the bottom of the lower projection 16 to the top of the upper projection 14 is selected to a value exceeding a gap formed between the load carrying platforms 24 of the dollies 20 stacked vertically. COPYRIGHT: (C)2006,JPO&NCIPI