| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that it is good from stretching to one wheel in the invention of patent publications 2014-184103, however, when actually carrying a marketing bag or a heavy material of a weight of 3 kg to 5 kg, it is slipped off laterally.SOLUTION: In the conventional patent publications 2014-184103, there is a portion to be added a little more. First of all, when extended from stretching, furthermore, it is slipped off without any material for supporting a marketing bag or a heavy material. The material opened in a fan shape or opened in a V-shape and crossed, or the material that mounts the marketing bag or the heavy material, is needed for the time being. Then, if connecting a pneumatic tire, a sponge tire or a rubber tire to form a roller shape, it is thought that the steps are easy to climb up. (Even a shape such as 2-stages to 5-stages adjustment may be good). A stopper is also attached to the bottom wheel so as to be convenient for hooking the marketing bag or the heavy material.SELECTED DRAWING: Figure 13 |
