Patent ID: 6475116
Filing Date: 2002-11-05
Classification: A63B,A63K

Abstract:
An adjustable grid, comprising a base of a predetermined width, the base having two ends each with a respective fixing portion, each fixing portion having a coupling device for fixing a rope; a pivotal scat coupled to each of the fixing portions of the base; a grid having opposing ends respectively pivotally coupled to the pivotal seats; each pivotal seat having a positioning steel ball; each end of having a positioning hole disposed in correspondence with a respective positioning steel ball when the grid is disposed in an upright position, thereby each positioning steel ball extending into the positioning hole of a respective grid end for positioning the grid upright; each of the pivotal seats has an opening at a predetermined position with respect to a pivotal rotation direction of the grid, wherein the ends of the grid respectively pass through the openings of the pivotal seats.