Pre-embedded connector formed by hot rolled steel for concrete

Abstract

A pre-embedded connector formed by hot-rolled steel for concrete including a channel bar and an anchor-bolt connecting with it. The channel bar has a channel shape and has a notch. A T type of connecting screw bolt having a bolting portion is provided inside each of the channel feet of the two sides of channel bar. The channel bar is formed by hot-rolling. There are small teeth which are provided on inboard surfaces of the two channel feet of the channel bar, forming two inboard teeth-shape surfaces, which firmly connect with the two inboard surfaces of the bolting portions of the T type of connecting screw bolt. The anchor-bolt is installed on the top of the channel bar and the feet of the anchor bolt are fixed on a planar surface of the top of the channel bar by welding.

1 . A pre-embedded connector formed by hot-rolled steel for concrete, comprising: 
 a channel bar;    an anchor bolt connected to the channel bar, the channel bar having a channel shape and having a notch; and    two T-type connecting screwbolts provided inside two channel feet formed on two sides of the channel bar, respectively, each of the T-type connecting screwbolts having a bolting portion,    wherein the channel bar is formed by hot-rolling,    wherein small teeth are provided on inboard surfaces of the two channel feet of the channel bar so as to form two inboard teeth-shape surfaces for firmly connecting with the inboard surface of the bolting portion of each of the two T-type connecting screwbolts, and    wherein the anchor bolt is installed on a planar surface of a top of the channel bar and the feet of the anchor bolt are fixed on a planar surface of the top of the channel bar by welding.    
   
   
       2 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 1 , wherein said peripheral surfaces of the anchor-bolt are provided with projecting strengthening ribs.  
   
   
       3 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 2 , wherein the projecting strengthening ribs are arranged spirally.  
   
   
       4 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 2 , wherein the projecting strengthening ribs are arranged in a patterned form.  
   
   
       5 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 2 , wherein the projecting strengthening ribs are arranged longitudinally.  
   
   
       6 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 1 , wherein the small teeth, which are provided on the teeth-shape surfaces of the channel feet of the channel bar, are thin serrations  14  which are arranged continuously.  
   
   
       7 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 1 , wherein the small teeth, which are provided on the teeth-shape surfaces of the channel feet of the channel bar, are thin serrations  14  which are arranged intermittently.  
   
   
       8 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 1 , wherein the feet of the anchor-bolt are fixedly connected to the plane surface of the groove top by welding.  
   
   
       9 . The pre-embedded connector formed by hot-rolled steel for concrete according to  claim 1 , wherein the feet of the anchor-bolt are fixedly connected to the plane surface of the groove top by fusion-welding.