Patent ID: 9598855
Date: 2017-03-21
CPC Classifications: E04B,E04C,F16B

Claim:
1. A hexahedron unit for prefabricated buildings, comprising twelve frames, wherein two frames of adjoining units are fixedly connected by means of a frame joint, wherein the frame joint includes a planar frame joint body, two or more connectors vertically coupled to the frame joint body, and an insertion section connected to an end side of the connector, wherein the frame includes an elongate bar-type frame body having a hollow rectangular sectional shape with a plurality of internal compartments divided by a plurality of partition walls, and a hollow insertion-space defined in the frame body in a shape corresponding to that of the insertion section of the frame joint body for fitting-engagement with the insertion section, wherein the frame further includes a longitudinal slot formed at a middle portion of a surface of the frame body, and insertion cutoffs formed on opposite sides of the slot and each having a cut width smaller than that of the slot, wherein the insertion section is fixed to the insertion-space by inserting the insertion section into the slot and then laterally moving the insertion section along the insertion-space provided underneath the insertion cutoffs, and wherein the insertion section of the frame joint is an expandable member whose sectional shape has an open structure so that, upon filling with a filler material, the insertion section expands so as to intensify the fitting-engagement with the insertion-space of the frame.