Reinforcing bar coupler

Abstract

A reinforcing bar coupler is provided to couple a pair of reinforcing bars with a mechanical coupling method, thus ensuring a prompt and easy coupling operation and allowing the reinforcing bars to be firmly coupled to each other. The reinforcing bar coupler includes a cylindrical base sleeve. The base sleeve is open at a surface thereof, and has a first seating groove on an inner surface thereof so that the ends of the reinforcing bars are seated therein, and a pair of first locking parts each having a first slanted surface. A cover sleeve has a second seating groove on a surface thereof to cover the reinforcing bars seated in the first seating groove of the base sleeve. A wedge has a pair of second locking parts each having a second slanted surface, and is fitted into the base sleeve to wedge the cover sleeve and the reinforcing bars into the base sleeve.

1  to  22 . (canceled)  
   
   
       23 . A reinforcing bar coupler for coupling an overlapped first and second reinforcing bar ( 1 ,  1   a ) each other, each of the first and second reinforcing bar ( 1 ,  1   a ) including a plurality of semi-annular ribs ( 12 ) and longitudinal ribs ( 11 ), the reinforcing bar coupler comprising: 
 a base sleeve ( 2 ,  2   b ) forming semi-cylindrical shape of dual cavities with a lateral opening ( 23 ) along with axial direction for seating the first and second reinforcing bar ( 1 ,  1   a ) laid in parallel, inner surface of said base sleeve ( 2 ,  2   b ) forming a plurality of semi-annular grooves ( 26 ) for fitting the semi-annular ribs ( 12 ) and semi-cylindrical ridges ( 24 ) for seating the first and second reinforcing bar ( 1 ,  1   a ), and a pair of locking parts ( 27 ) along with both edges of lateral walls ( 25 ),    a cover sleeve ( 3 ,  3   b ) forming dual arch shaped cut-outs, inner surface of said cover sleeve ( 3 ,  3   b ) forming semi-annular grooves ( 32 ) and semi-cylindrical ridges ( 31 ) for fitting the semi-annular ribs ( 12 ) of the first and second reinforcing bars ( 1 ,  1   a ) and a flat top surface ( 33 ) at opposite side, and    a wedge ( 4 ,  4   b ) having gradually decreasing thickness along with the axial direction, and a pair of locking sections ( 45 ) along with both edges ( 46 ) for firmly coupling the first and second reinforcing bar ( 1 ,  1   a ) as axially slide advancing into said base sleeve ( 2 ,  2   b ).    
   
   
       24 . The reinforcing bar coupler according to  claim 23 , wherein said locking parts ( 27 ) of the base sleeve ( 2 ,  2   b ) are integrally formed a right-triangle shaped edge with inwardly slanted surfaces ( 29 ), said locking sections ( 45 ) of the wedge ( 4 ,  4   b ) are integrally formed a right-triangle shape groove with outwardly slanted surfaces ( 46 ), both slanted surfaces ( 29 ,  46 ) having same slope for smoothly mating each other and press-bonding the first and second reinforcing bars ( 1 ,  1   a ).  
   
   
       25 . The reinforcing bar coupler according to  claim 23 , wherein intervals of the semi-annular grooves ( 26 ) and semi-cylindrical ridges ( 24 ) of said base sleeve ( 2 ,  2   b ) have same that of the semi-annular ribs ( 12 ) of the first and second reinforcing bars ( 1 ,  1   a ), and outer surface of said base sleeve ( 2 ,  2   b ) formed multiple of semi-annular ribs ( 22 ) and longitudinal ribs ( 21 ) same shape as the semi-annular ribs ( 12 ) and longitudinal ribs ( 11 ) of the first and second reinforcing bars ( 1 ,  1   a ).  
   
   
       26 . The reinforcing bar coupler according to  claim 25 , wherein an overall length of said base sleeve ( 2 ,  2   b ) is a half interval of the semi-annular ribs shorter than that of said cover sleeve ( 3 ,  3   b ), a set of serrations ( 33   a ) formed at one end portion of the flat top surface ( 33 ) of the cover sleeve ( 3 ,  3   b ), said wedge ( 4 ,  4   b ) forming a flat bottom surface ( 43 ) for contacting with said flat top surface ( 33 ) of the cover sleeve ( 3 ,  3   b ), a set of serrations ( 43   a ) formed at one end portion of the flat bottom surface ( 43 ) of said wedge ( 4 ,  4   b ), more than one groove ( 44 ) formed on said flat bottom surface ( 43 ) along with the axial direction, and a scale ( 48 ) formed at outer surface.  
   
   
       27 . The reinforcing bar coupler according to  claim 23 , wherein an interval of the semi-annular grooves ( 26 ) and semi-cylindrical ridges ( 24 ) of the base sleeve ( 2 ,  2   b ) and the cover sleeve ( 3 ,  3   b ) is a half that of the semi-annular ribs ( 12 ) of the reinforcing bars ( 1 ,  1   a ).  
   
   
       28 . The reinforcing bar coupler according to  claim 23 , wherein the base sleeve ( 2   b ) and the wedge ( 4   b ) are produced through elastic process with a uniform thickness of steel plate, said locking parts ( 27 ) of the base sleeve ( 2   b ) are bent to have a clearance slightly less than a thickness of said locking sections ( 45 ) of the wedge ( 4   b ) for tightly press-fitting to the clearance, said locking sections ( 45 ) of the wedge ( 4   b ) formed laterally bent-up and gradually decreased its height along with the axial direction, a striking head ( 42 ) formed at the higher end and a scale ( 48 ) formed on the outer surface.  
   
   
       29 . A reinforcing bar coupler for coupling an overlapped first and second reinforcing bar ( 1 ,  1   a ) each other, each of the first and second reinforcing bar ( 1 ,  1   a ) including a plurality of semi-annular ribs ( 12 ) and longitudinal ribs ( 11 ), the reinforcing bar coupler comprising: 
 a base sleeve ( 2   a ) forming semi-cylindrical shape of dual cavities with a lateral opening ( 23 ) along with axial direction for seating the first and second reinforcing bar ( 1 ,  1   a ) laid in parallel, inner surface of said base sleeve ( 2   a ) forming a plurality of semi-annular grooves ( 26 ) for fitting the semi-annular ribs ( 12 ) and semi-cylindrical ridges ( 24 ) for seating the first and second reinforcing bar ( 1 ,  1   a ), and a pair of locking parts ( 27 ) along with both edges of lateral walls ( 25 ), and    a wedge ( 4   a ) having gradually decreasing thickness along with the axial direction, and a pair of locking sections ( 45 ) along with both edges ( 46 ) for firmly coupling the first and second reinforcing bar ( 1 ,  1   a ) as axially slide advancing into said base sleeve ( 2   a ).    
   
   
       30 . The reinforcing bar coupler according to  claim 29 , wherein the base sleeve ( 2   a ) and the wedge ( 4   a ) are produced through elastic process with a uniform thickness of steel plate, said locking parts ( 27 ) of the base sleeve ( 2   a ) are bent to have a clearance slightly less than a thickness of said locking sections ( 45 ) of the wedge ( 4   a ) for tightly press-fitting to the clearance, said locking sections ( 45 ) of the wedge ( 4   a ) formed laterally bent-up at both edges and gradually decreased its height along with the axial direction, a striking head ( 42 ) formed at the higher rear end, and a scale ( 48 ) formed on the outer surface.  
   
   
       31 . The reinforcing bar coupler according to  claim 29 , wherein the wedge ( 4   a ) forms a flat bottom surface ( 43 ) with a serration ( 43   a ), a chamfered edge ( 41 ) at a thinner front end and a striking head ( 42 ) at the thicker rear end for striking to insert, and a scale ( 48 ) on the outer surface.  
   
   
       32 . The reinforcing bar coupler according to  claim 29 , wherein said locking parts ( 27 ) of the base sleeve ( 2   a ) are integrally formed a right-triangle shape edge with outwardly slanted surfaces ( 29 ) at both edges of the lateral walls ( 25 ), said locking sections ( 45 ) of the wedge ( 4   a ) are integrally formed a U-shape hook with inwardly slanted surfaces ( 46 ), both slanted surfaces ( 29 ,  46 ) having same slope for smoothly mating each other and firmly press-bonding the first and second reinforcing bars ( 1 ,  1   a ), a bottom surface of the wedge ( 4   a ) formed a serration ( 43   a ), and a scale ( 48 ) formed on the outer surface.  
   
   
       33 . A reinforcing bar coupler for coupling a pair of butted first and second reinforcing bar ( 1 ,  1   a ), each of the first and second reinforcing bar ( 1 ,  1   a ) including a plurality of semi-annular ribs ( 12 ) and longitudinal ribs ( 11 ), the reinforcing bar coupler comprising: 
 a base sleeve ( 2   c ,  2   d ) forming a semi-cylindrical shaped cavity with a lateral opening ( 23 ) along with axial direction for seating the first and second reinforcing bar ( 1 ,  1   a ) laid in butt, inner surface of said base sleeve ( 2   c ,  2   d ) forming a plurality of semi-annular grooves ( 26 ) for fitting the semi-annular ribs ( 12 ) and semi-cylindrical ridges ( 24 ) for seating the first and second reinforcing bar ( 1 ,  1   a ), and a pair of locking parts ( 27 ) along with both edges of lateral walls ( 25 ),    a cover sleeve ( 3   c ,  3   d ) forming an arch shaped cut-out, inner surface of said cover sleeve ( 3   c ,  3   d ) forming semi-annular grooves ( 32 ) and semi-cylindrical ridges ( 31 ) for fitting the semi-annular ribs ( 12 ) of the first and second reinforcing bars ( 1 ,  1   a ) and a flat top surface ( 33 ) at opposite side, and    a wedge ( 4   c ,  4   d ) having gradually decreasing thickness along with the axial direction, and a pair of locking sections ( 45 ) along with both edges ( 46 ) for firmly coupling the first and second reinforcing bar ( 1 ,  1   a ) as axially slide advancing into said base sleeve ( 2   c ,  2   d ).    
   
   
       34 . The reinforcing bar coupler according to  claim 33 , wherein said locking parts ( 27 ) of the base sleeve ( 2   c ,  2   d ) are integrally formed a right-triangle shaped edge with inwardly slanted surfaces ( 29 ), said locking sections ( 45 ) of the wedge ( 4   c ,  4   d ) are integrally formed a right-triangle shape groove with outwardly slanted surfaces ( 46 ), both slanted surfaces ( 29 ,  46 ) having same slope for smoothly mating each other and press-bonding the first and second reinforcing bars ( 1 ,  1   a ).  
   
   
       35 . The reinforcing bar coupler according to  claim 33 , wherein said locking parts ( 27 ) of the base sleeve ( 2   c ) are formed to taper down from both end openings to center, a pair of the wedge ( 4   c ) are inserted from both end openings of the base sleeve ( 2   c ) for press-bonding the cover sleeve ( 3   c ) and the first and second reinforcing bars ( 1 ,  1   a ), together.  
   
   
       36 . The reinforcing bar coupler according to  claim 33 , wherein said base sleeve ( 2   c ,  2   d ) and said cover sleeve ( 3   c ,  3   d ) form a space ( 28 ,  34 ) slightly deeper than the semi-annular grooves ( 26 ,  32 ) at their center portion for resting the ends of the butted first and second reinforcing bar ( 1 ,  1   a ).  
   
   
       37 . The reinforcing bar coupler according to  claim 33 , wherein an overall length of the base sleeve ( 2   c ,  2   d ) is a half interval of the semi-annular rib shorter than that of the cover sleeve ( 3   c ,  3   d ), a half of semi-annular groove ( 32 ) formed at mouth of the cover sleeve ( 3   c ,  3   d ), a set of serrations ( 33   a ) formed at one end portion of the flat top surface ( 33 ), said wedge ( 4   c ,  4   d ) having a flat bottom surface ( 43 ) for contacting with said flat top surface ( 33 ) of the cover sleeve ( 3   c ,  3   d ), a set of serrations ( 43   a ) formed at one end portion of said flat bottom surface ( 43 ), at least one linear groove ( 44 ) formed on the flat bottom surface ( 43 ) along with the axial direction of the wedge ( 4 ,  4   b ), and a scale ( 48 ) formed on outer surface.  
   
   
       38 . The reinforcing bar coupler according to  claim 33 , wherein the base sleeve ( 2   e ) and the wedge ( 4   e ) are produced through elastic process with a uniform thickness of steel plate, said locking parts ( 27 ) of the base sleeve ( 2   e ) are bent to have a clearance slightly less than a thickness of said locking sections ( 45 ) of the wedge ( 4   e ) for tightly press-fitting to the clearance, said locking sections ( 45 ) of the wedge ( 4   e ) formed laterally bent-up both edges and gradually decreased its height along with the axial direction, a striking head ( 42 ) formed at the higher rear end, and a scale ( 48 ) formed on outer surface.