家里搞装修时,师傅们不停地在人字梯上爬上爬下,将所需材料搬上去后又下来拿东西,既费力又花时间,而且他们还得不停地换地方,老是要挪动梯子。如果梯子能够自己移动,那该多好。于是,我想到了发明一种可以自由移动的电动梯子。我运用加一加、变形法、拓展法等发明方法,在人字梯上加上自走装置(轮 Home decoration, the masters are constantly climbing up and down the ladder in the ladder, the necessary materials to go up and then get something, both laborious and time-consuming, but they also have to constantly change place, always To move the ladder. If the ladder can move on its own, how wonderful it is. So, I thought of inventing a free-moving electric ladder. I use plus one plus, deformation method, expansion method and other methods of invention, in the human ladder with self-propelled device (wheel