Device for preventing buoyance in hollow concrete slab

The present invention relates to a device for preventing the buoyancy of the weight body in a hollow slab unit panel for assembly with integral body weight, buoyancy prevention device according to the present invention is formed bent yi one end to walk to the upper wire mesh Custom and, to prevent buoyancy threaded is formed in the other end rod, a through-hole formed at the center and with the inner wall of the through hole, the screw thread is formed is inserted into the said buoyancy prevention rod threaded fixing member is screwed, one end with the pressure holding member is threaded is formed which is inserted is screwed to the fixing member, an alignment projection formed to walk along the outer circumferential surface side of the other end, the tightening and the engagement groove which is fitted to the fixing member is formed, the engaging projections and the slab is configured to include a washer that is disposed between the lower face of the dice, the engaging projections are the slaves Has a smaller diameter than the through hole provided in the bracket mold, the engaging projections of the fastening fixing member fastened to the fixed member after passing through the through hole to the lower side from the upper side of the slab mold and the washer with parameters the slab is pressed against the lower face of the dice, it may simply assemble the buoyancy protection to the reinforcement or the wire mesh and the slab mold fastened to the light-weight material, it is possible to reduce the time and airborne required for installation of the buoyancy protection construction is easy and you can reduce costs.