| 摘要 |
<p>PROBLEM TO BE SOLVED: To facilitate change of a traveling direction while forming a carrier appropriate to traction and propulsion by forming both side pieces of a handle so as to be extended along each side surface of opposite sides of a base plate at a position lower than a top surface of a base plate. SOLUTION: A central piece is directed in parallel with a first side of a base plate 1, and ends of both side pieces are provided in each side surface of opposite pieces of the base plate 1 adjacent to the first side freely to be turned around shafts 41, 42. A handle 2 can be freely stood and fallen in relation to the base plate 1. In the condition that the handle 2 is fallen, both side pieces respectively tightly contact with the base plate 1 outside of each opposite side. The shafts 41, 42 are provided along the side surfaces of the base plate 1 at positions lower by a length L from the top surface of the base plate 1. Length L is set at a half of the thickness R of the handle 2 or more and desirably at the thickness R or less. The handle 2 is not projected from the top surface 15 of the base plate 1 by falling the handle 2 toward the base plate 1 so as to be in parallel with the base plate 1.</p> |
