Cisoid boundary member

The utility model discloses a cisoid boundary member, it includes: containing box, wheel base footboard roof beam, slide, track check chain, wheel footboard, power device, the wheel footboard include: wheel footboard roof beam and board, auxiliary wheel are established on wheel footboard roof beam, inboard wheel footboard, outside wheel footboard include: wheel footboard roof beam and board, auxiliary wheel are established on wheel footboard roof beam, and the width of board is length half the of wheel footboard roof beam, and the board is fixed in the top of wheel footboard roof beam, the wheel footboard roof beam setting straggly of inboard wheel footboard and outside wheel footboard, and each wheel footboard roof beam can insert between the corresponding wheel footboard roof beam, and two boards close up to become an organic whole, wheel footboard containing box is installed below way dental calculus department, pavement. Scattered space in the usable district, narrower road parks. Wheel footboard containing box can set up below way dental calculus department, pavement, and is pleasing to the eye, does not influence the vehicle when not using and traveles.