Joint structure of iron framework and coupling member for connecting rectangular steel beam to rectangular steel column

Abstract

The present invention provides a joint structure of iron framework capable of enhancing workability and strength. The joint structure of iron framework 1 is a joint structure of iron framework for connecting a hollow rectangular steel beam 4 to a hollow rectangular steel column 2 via a coupling member 3 . The coupling member 3 includes: a rectangular cylinder 31 fitted to an outer periphery of the hollow rectangular steel column 4 and firmly attached to the hollow rectangular steel column 4 ; a U-shaped receiving member 4 provided to a side surface of the rectangular cylinder 31 for connecting the hollow rectangular steel beam 4 , the U-shaped receiving member 32 having a bottom portion 32 b protruded from the side surface of the rectangular cylinder 31 , having a U-shaped opening portion 32 located to face upward, having a U-shaped end surface firmly attached to the side surface of the rectangular cylinder 31 ; and a lid 33 firmly attached to the U-shaped receiving member 32 in a state of covering the upper surface of the hollow rectangular steel beam 4 mounted in the U-shaped receiving member 32.

1 . A joint structure of iron framework for connecting a hollow rectangular steel beam to a hollow rectangular steel column via a coupling member, wherein the coupling member comprising: 
 a rectangular cylinder fitted to an outer periphery of the hollow rectangular steel column and firmly attached to the hollow rectangular steel column;    a U-shaped receiving member provided to a side surface of the rectangular cylinder for connecting the hollow rectangular steel beam, the U-shaped receiving member having a bottom portion protruded from the side surface of the rectangular cylinder, having a U-shaped opening portion located to face upward, having a U-shaped end surface firmly attached to the side surface of the rectangular cylinder; and    a lid firmly attached to the U-shaped receiving member in a state of covering the upper surface of the hollow rectangular steel beam mounted in the U-shaped receiving member.    
   
   
       2 . The joint structure of iron framework according to  claim 1 , wherein a slit is formed on each side surface of a rectangular cylinder, and the rectangular cylinder is firmly attached to a hollow rectangular steel column via the slit.  
   
   
       3 . The joint structure of iron framework according to  claim 1 , wherein the bottom portion of the U-shaped receiving member is formed with a bottom bolt hole for allowing a bolt to pass therethrough, a right rising portion which is one of the sides rising from the bottom portion is formed with a right bolt hole for allowing a bolt to pass therethrough, and a left rising portion which is the other side rising from the bottom portion is formed with a left bolt hole, respectively, and 
 wherein the bottom surface of the hollow rectangular steel beam is formed with a bottom surface bolt hole corresponding to the bottom bolt hole, and the left side surface of the hollow rectangular steel beam is formed with a left side surface bolt hole corresponding to the left bolt hole, and a left side surface of the hollow rectangular steel beam is formed with a left side surface bolt hole corresponding to the left bolt hole,    wherein the upper surface of the hollow rectangular steel beam is formed with a hand insertion hole of a size allowing a hand to enter therein, and    wherein the U-shaped receiving member and the hollow rectangular steel beam are connected to each other by the bottom bolt and the bottom nut via the bottom bolt hole and the bottom surface bolt hole, by the left bolt and the left nut via the left bolt hole and the left side surface bolt hole, and by the right bolt and the right nut via the right bolt hole and the right side surface bolt hole.    
   
   
       4 . The joint structure of iron framework according to  claim 1 , wherein the bottom portion of the U-shaped receiving member is formed with a bottom bolt hole for allowing a bolt to pass therethrough, a surface of a right rising portion which is one of the sides rising from the bottom portion of the U-shaped receiving member is formed with a right bolt hole for allowing a bolt to pass therethrough, and a surface of a left rising portion which is the other side rising from the bottom portion is formed with a left bolt hole, respectively; 
 wherein the bottom surface of the hollow rectangular steel beam is formed with a bottom surface bolt hole corresponding to the bottom bolt hole, and the left side surface of the hollow rectangular steel beam is formed with a left side surface bolt hole corresponding to the left bolt hole, and a left side surface of the hollow rectangular steel beam is formed with a left side surface bolt hole corresponding to the left bolt hole;    wherein the side surface of the hollow rectangular steel beam is formed with a hand insertion hole of a size allowing a hand to enter therein;    wherein a surface of the right rising portion or a surface of the left rising portion is formed with a hand insertion hole of rising portion's side surface corresponding to the hand insertion hole of rectangular beam's side surface; and    wherein the U-shaped receiving member and the hollow rectangular steel beam are connected to each other by the bottom bolt and the bottom nut via the bottom bolt hole and the bottom surface bolt hole, by the left bolt and the left nut via the left bolt hole and the left side surface bolt hole, and by the right bolt and the right nut via the right bolt hole and the right side surface bolt hole.    
   
   
       5 . The joint structure of iron framework according to  claim 1 , wherein a lid is in a rectangular shape when viewed along its plane, 
 wherein one side of the rectangle facing to the hollow rectangular steel column is firmly attached to a rectangular cylinder by welding;    wherein another side of the rectangle facing to the right rising portion which is one of the sides rising from the U-shaped receiving member is firmly attached to the right rising portion by welding;    wherein still another of the rectangle facing to the left rising portion which is the other side rising from the U-shaped receiving member is firmly attached to the left rising portion by welding;    wherein the remaining one side of the rectangle facing to the upper surface of the hollow rectangular steel beam is firmly attached to the hollow rectangular steel beam; and    wherein the lid is formed with slits, and the lid is firmly attached to the hollow rectangular steel beam via the slits.    
   
   
       6 . The joint structure of iron framework according to  claim 1 , wherein a reinforcing member is provided to traverse the hollow rectangular steel column along its longitudinal direction.  
   
   
       7 . The joint structure of iron framework according to  claim 1 , wherein a reinforcing member is provided to traverse the hollow rectangular steel beam along its longitudinal direction.  
   
   
       8 . The joint structure of iron framework according to  claim 1 , wherein a reinforcing member is provided to traverse the hollow rectangular steel beam along its longitudinal direction.  
   
   
       9 . The joint structure of iron framework according to  claim 1 , wherein a plurality of reinforcing members are provided to traverse the hollow rectangular steel beam in its longitudinal direction, and a grout material is injected in a space between the reinforcing members.  
   
   
       10 . The joint structure of iron framework according to  claim 1 , wherein the U-shaped receiving member includes: an L-shaped receiving member without either one of the right rising portion and the left rising portion rising from the bottom portion; and a flat-shaped member connected to the bottom portion of the L-shaped receiving member by welding at a position having no rising portion so as to form a U shape in cross section.  
   
   
       11 . A coupling member including: 
 a rectangular cylinder fitted to an outer periphery of a hollow rectangular steel column and firmly attached to a hollow rectangular steel column;    a U-shaped receiving member provided to a side surface of the rectangular cylinder, the U-shaped receiving member having a bottom portion protruded from the side surface of the rectangular cylinder, having a U-shaped opening portion located to face upward, having a U-shaped end surface firmly attached to the side surface of the rectangular cylinder; and    a lid firmly attached to the U-shaped receiving member in a state of covering the upper surface of the hollow rectangular steel beam mounted in the U-shaped receiving