Prefabricated pontoon

Abstract

A prefabricated pontoon includes: main bodies, each including an upper and a lower main bodies that come in surface contact with each other and having coupling grooves formed thereon along border surfaces thereof; joint bars configured to be inserted into the upper and lower main bodies during forming of the upper and lower main bodies, with a part thereof being positioned and exposed in the coupling grooves to correspond to the coupling grooves; pairs of fastening members configured to be inserted into through-holes symmetrically formed in the upper and lower main bodies to be fastened to one another; and connectors configured to connect the main bodies and each having one end that is inserted into any one of the coupling grooves formed on one of the main bodies and the other end that is inserted into any one of the coupling grooves formed on another of the main bodies.

What is claimed is: 
     
         1 . A prefabricated pontoon comprising:
 a plurality of main bodies, each including an upper main body and a lower main body that come in surface contact with each other and having a plurality of coupling grooves formed thereon at predetermined intervals along border surfaces thereof;   a plurality of joint bars configured to be inserted into the upper main body and the lower main body during forming of the upper main body and the lower main body, with a part thereof being positioned and thus exposed in the plurality of coupling grooves to correspond to the plurality of coupling grooves;   a plurality of pairs of fastening members configured to be inserted into a plurality of through-holes symmetrically formed in predetermined positions of the upper main body and the lower main body to be fastened to one another; and   a plurality of connectors configured to connect the plurality of main bodies to one another and each having one end that is inserted into any one of the plurality of coupling grooves formed on one of the plurality of main bodies and the other end that is inserted into any one of the plurality of coupling grooves formed on another of the plurality of main bodies.   
     
     
         2 . The prefabricated pontoon as claimed in  claim 1 , wherein the pair of fastening members comprise first and second fasteners, each of which has a flange portion and a fastening portion formed to project from the flange portion,
 wherein a male screw portion is formed on an outer periphery of one of the fastening portions and a female screw portion is formed on an inner periphery of the other of the fastening portions.   
     
     
         3 . The prefabricated pontoon as claimed in  claim 2 , wherein a hook portion is formed to project from any one of the pair of flange portions in an opposite direction to the fastening portions. 
     
     
         4 . The prefabricated pontoon as claimed in  claim 1 , wherein at least one insertion groove is formed on an upper surface of the lower main body, and at least one insertion projection that is inserted into the insertion groove is formed on a lower surface of the upper main body. 
     
     
         5 . The prefabricated pontoon as claimed in  claim 1 , wherein each of the plurality of joint bars comprises a body on which at least one fixing rib is formed to project to be symmetrical with an upper surface and a lower surface thereof in a predetermined position in a length direction thereof, a first coupling portion coupled to one end of the body and having a coupling groove formed thereon, and a second coupling portion coupled to the other end of the body and having a coupling projection formed thereon. 
     
     
         6 . The prefabricated pontoon as claimed in  claim 5 , wherein the first coupling portion and the second coupling portion are coupled to the body with different heights. 
     
     
         7 . The prefabricated pontoon as claimed in  claim 1 , wherein core materials for strength reinforcement are provided in the plurality of connectors.