Patent ID: 7926230

Claim:
A bracket structure for an external wall used at an outside corner part of the wall surface of a building, comprising: two first bracket members each of which has a base part and a rising part so that the base part and the rising part form a L-shape, two second bracket members, each of which has a slide part into which the rising part of the first bracket can be inserted and a front part so that the slide part and the front part form a L-shape, and two third bracket members for an outside corner, each of the third bracket member has a sliding part into which the front part of the second bracket can be inserted and a contact part, wherein the rising part of each of the first bracket member is inserted into the slide part of each of the second bracket member so that the rising part of the first bracket member is slidably but nonrotatably connected to the slide part of the second bracket member, the front part of each of the second bracket is inserted into the sliding part of each of the third bracket member so that the front part of the second bracket is slidably but nonrotatably connected to the sliding part of the third bracket member, and the contact part of the third bracket member is fixed to the contact part of the other third bracket member, wherein the rising part of the first bracket member has a rib extending in a direction in which the rising part of the first bracket member is inserted into the slide part of the second bracket member, and the slide part of the second bracket member has an edge portion in longitudinal direction so that the edge portion slidably hold the rising part of the first bracket member and generally contact with the rib of the first bracket member, and the front part of the second bracket member has a rib extending in a direction in which the front part of the second bracket member is inserted into the slide part of the third bracket member, and the slide part of the third bracket member has an edge portion in longitudinal direction so that the edge portion slidably hold the front part of the second bracket member and generally contact with the rib of the second bracket.