Fastening member and external wall construction structure

Abstract

A fastening member is formed out of one steel sheet to comprise: a base plate portion constituting amount portion to be fixed to a building frame; a right support portion, a left support portion, a central support portion and a lower support portion that fix stably the exterior wall boards; a central horizontal raised portion and a downwardly bent portion that lock shiplap portions of an exterior wall board disposed below the fastening member; bearing portions and upper-board locking portions that lock the shiplap portions of exterior wall boards that are disposed above the fastening member; upwardly bent portions; and front plate portions. A waterproof material made of bentonite is provided at the left and right ends of the central horizontal raised portion, the top surfaces of the upwardly bent portions and the front surfaces of the front plate portions.

1 . A fastening member for an exterior wall board, comprising:
 a left support portion and a right support portion provided at left and right sides of the fastening member, and abutting a back surface of the exterior wall board when the board is fastened,   the fastening member further comprising, at a region flanked by the left support portion and the right support portion:   a base plate portion constituting a mount portion to be fixed to a building frame;   a central support portion that abuts the back surface of the exterior wall board when the board is fastened;   a central horizontal raised portion that is erected, in a horizontal direction, frontward from the lower end of the central support portion;   a downwardly bent portion that is bent downwards from the front end of the central horizontal raised portion;   upwardly bent portions that are provided at the left and right of the downwardly bent portion, and are bent obliquely upwards from the front end of the central horizontal raised portion;   front plate portions that are bent downwards from the upper end of the upwardly bent portions;   bearing portions that are erected in the horizontal direction, at the left and right of the central horizontal raised portion, frontward from the central support portion;   upper-board locking portions bent upwards from the front end of the bearing portions; and   a lower support portion that abuts the back surface of the exterior wall board when the board is fastened,   the left support portion, the right support portion, the lower support portion and the central support portion of the fastening member being formed contiguously to each other through drawing one steel sheet;   the base plate portion being formed through depressing part of the upper region of the steel sheet towards the back surface thereof;   the central horizontal raised portion, the downwardly bent portion, the upwardly bent portions, the front plate portions, the bearing portions and the upper-board locking portions being formed through cutting and raising part of the lower region of the steel sheet towards the front surface thereof;   a waterproof material being provided at the left and right ends of the central horizontal raised portion, the top surfaces of the upwardly bent portions and the front surfaces of the front plate portions; and   the waterproof material being made of bentonite.   
   
   
       2 . The fastening member according to  claim 1 , wherein the waterproof material is made of bentonite and an elastic material. 
   
   
       3 . The fastening member according to  claim 1 , wherein the downwardly bent portion is coated in a blackish color or has a blackish tape adhered thereto. 
   
   
       4 . The fastening member according to  claim 2 , wherein the downwardly bent portion is coated in a blackish color or has a blackish tape adhered thereto. 
   
   
       5 . The fastening member according to  claim 1 , wherein the central horizontal raised portion is coated in a blackish color or has a blackish tape adhered thereto. 
   
   
       6 . The fastening member according to  claim 2 , wherein the central horizontal raised portion is coated in a blackish color or has a blackish tape adhered thereto. 
   
   
       7 . The fastening member according to  claim 3 , wherein the central horizontal raised portion is coated in a blackish color or has a blackish tape adhered thereto. 
   
   
       8 . The fastening member according to  claim 4 , wherein the central horizontal raised portion is coated in a blackish color or has a blackish tape adhered thereto. 
   
   
       9 . An external wall construction structure, comprising:
 a plurality of fastening members according to  claim 1  mounted in multiple rows such that a base plate portion abuts a mounting surface of a building frame;   an exterior wall board having shiplap portions at least at an upper edge and a lower edge, and fastened in such a manner that the back surface thereof abuts the left support portion, right support portion, central support portion and lower support portion of the fastening member;   the shiplap portions of the upper edges of the exterior wall board are locked on the central horizontal raised portion and the downwardly bent portion of the fastening member at an upper position;   the shiplap portions of the lower edge of the exterior wall board are locked on the bearing portions and the upper-board locking portions of the fastening member at a lower position; and   the shiplap portions of the lower edge of the exterior wall boards abut the waterproof material.   
   
   
       10 . An external wall construction structure, comprising:
 a plurality of fastening members according to  claim 2  mounted in multiple rows such that a base plate portion abuts a mounting surface of a building frame;   an exterior wall board having shiplap portions at least at an upper edge and a lower edge, and fastened in such a manner that the back surface thereof abuts the left support portion, right support portion, central support portion and lower support portion of the fastening member;   the shiplap portions of the upper edges of the exterior wall board are locked on the central horizontal raised portion and the downwardly bent portion of the fastening member at an upper position;   the shiplap portions of the lower edge of the exterior wall board are locked on the bearing portions and the upper-board locking portions of the fastening member at a lower position; and   the shiplap portions of the lower edge of the exterior wall boards abut the waterproof material.   
   
   
       11 . An external wall construction structure, comprising:
 a plurality of fastening members according to  claim 3  mounted in multiple rows such that a base plate portion abuts a mounting surface of a building frame;   an exterior wall board having shiplap portions at least at an upper edge and a lower edge, and fastened in such a manner that the back surface thereof abuts the left support portion, right support portion, central support portion and lower support portion of the fastening member;   the shiplap portions of the upper edges of the exterior wall board are locked on the central horizontal raised portion and the downwardly bent portion of the fastening member at an upper position;   the shiplap portions of the lower edge of the exterior wall board are locked on the bearing portions and the upper-board locking portions of the fastening member at a lower position; and   the shiplap portions of the lower edge of the exterior wall boards abut the waterproof material.   
   
   
       12 . An external wall construction structure, comprising:
 a plurality of fastening members according to  claim 5  mounted in multiple rows such that a base plate portion abuts a mounting surface of a building frame;   an exterior wall board having shiplap portions at least at an upper edge and a lower edge, and fastened in such a manner that the back surface thereof abuts the left support portion, right support portion, central support portion and lower support portion of the fastening member;   the shiplap portions of the upper edges of the exterior wall board are locked on the central horizontal raised portion and the downwardly bent portion of the fastening member at an upper position;   the shiplap portions of the lower edge of the exterior wall board are locked on the bearing portions and the upper-board locking portions of the fastening member at a lower position; and   the shiplap portions of the lower edge of the exterior wall boards abut the waterproof material.   
   
   
       13 . An external wall construction structure, comprising:
 a plurality of fastening members according to  claim 8  mounted in multiple rows such that a base plate portion abuts a mounting surface of a building frame;   an exterior wall board having shiplap portions at least at an upper edge and a lower edge, and fastened in such a manner that the back surface thereof abuts the left support portion, right support portion, central support portion and lower support portion of the fastening member;   the shiplap portions of the upper edges of the exterior wall board are locked on the central horizontal raised portion and the downwardly bent portion of the fastening member at an upper position;   the shiplap portions of the lower edge of the exterior wall board are locked on the bearing portions and the upper-board locking portions of the fastening member at a lower position; and   the shiplap portions of the lower edge of the exterior wall boards abut the waterproof material.