Built-up frame for supporting of a portable water pool

Abstract

Disclosed herewith is a built-up frame for supporting a portable water pool. The built-up frame is attached to the circumferential edge of the portable water pool. The built-up frame includes a plurality of fence rods each having a predetermined length. The fence rods are arranged one after another to form a polygonal shape. Each of the connectors has a through hole. Each pair of the connectors are fitted into the inner ends of two neighboring fence rods, and are overlapped together to be connected to each other at a predetermined angle. A plurality of support rods each have an upper end portion and at least one engaging projection projected from the upper end portion. Each of the support rods is inserted into and vertically supports two overlapped connectors. A plurality of tightening caps each accommodates the upper end portion of each of the support rods, and is each engaged with and disengaged from the upper end portion by rotating the cap by a predetermined angle regardless of direction.

What is claimed is:  
     
         1 . A built-up frame for supporting a portable water pool, said built-up frame being attached to the circumferential edge of the portable water pool, comprising: 
 a plurality of fence rods each having a predetermined length, said fence rods being arranged one after another to form a polygonal shape;    a plurality of pairs of connectors, each of said connectors having a through hole, each pair of said connectors being fitted into the inner ends of two neighboring fence rods and being overlapped together to be connected to each other at a predetermined angle;    a plurality of support rods each having an upper end portion and at least one engaging projection projected from said upper end portion, each of said support rods being inserted into and vertically supporting two overlapped connectors; and    a plurality of tightening caps, each of said caps accommodating the upper end portion of each of said support rods and being engaged with and disengaged from said upper end portion by rotating said cap by a predetermined angle regardless of direction.    
     
     
         2 . The built-up frame according to    claim 1   , wherein each of said connectors comprises: 
 a cylindrical body tightly fitted into each end of the fence rod;    a connector plate extended from the front surface of said connector body, said connector plate further comprising a stopper portion that is forwardly projected from one side of the front surface of said connector plate so as to restrict the relative rotation of each pair of two neighboring fence rods;    a step portion formed on one surface of a connector plate at a position where said connector body and said connector plate are connected to each other to transverse the connector body, a portion of the front surface of said stepped portion being curved to correspond to the curved portion of the front surface of said connector plate of another neighboring connector plate;    a through hole formed through the center portion of the connector plate; and    at least one notch radially outwardly extended from the circumferential surface of said through hole to allow the engaging projection of said support rod to pass through.    
     
     
         3 . The built-up frame according to    claim 1   , wherein said tightening cap comprises: 
 a receiving hole comprised of a small diameter hole portion, and a large diameter hole portion inwardly extended from said small diameter hole, thus forming a stepped surface between said small and large diameter hole portions; and    at least one notch radially outwardly extended from the circumferential surface of said through hole to allow the engaging projection of said support rod to pass through;    wherein said engaging projection of said support rod is held tightly against said stepped surface by rotating said engaging projection by a predetermined angle when said engaging projection is inserted to a predetermined depth.    
     
     
         4 . The built-up frame according to    claim 3   , wherein said step surface is provided with a seat portion, said seat portion being comprised of peripheral convex sub-portions and a center concave sub-portion, so as to hold said engaging projection of said support rod tightly when said tightening cap is rotated by a predetermined angle.