Internal Fixer For Anchor Having Releasable Tensioning Steel Wire

Abstract

The present invention provides an internal fixer for an anchor having a releasable tensioning steel wire. The internal fixer of the present invention includes a first outer body ( 10 ), which is provided with a tube coupling hole ( 11 ), a body seating hole ( 13 ) and a wedge receiving body support means; and a wedge receiving body ( 30 ), which is seated in the body seating hole ( 13 ) and has a conical wedge seating hole ( 31 ), into which separated wedge bodies ( 41 ) are seated. The internal fixer further includes a wedge unit ( 40 ), which is seated in the wedge seating hole ( 31 ) of the wedge receiving body ( 30 ) and comprises the three separated wedge bodies ( 41 ); and a second outer body ( 20 ), which supports and covers both the wedge receiving body ( 30 ), which is seated in the body seating hole ( 13 ), and the wedge unit ( 40 ), which is placed in the wedge seating hole ( 31 ).

1 . An internal fixer for an anchor having a releasable tensioning steel wire, comprising:
 a first outer body ( 10 ), with a tube coupling hole ( 11 ) and a body seating hole ( 13 ) coaxially formed in the first outer body ( 10 ) so that the tensioning steel wire ( 50 ) passes therethrough, and wedge receiving body support means provided on an inner surface of the body seating hole ( 13 );   a wedge receiving body ( 30 ) seated by the wedge receiving body support means in the body seating hole ( 13 ) and having a conical wedge seating hole ( 31 ), into which separated wedge bodies ( 41 ) are seated;   a wedge unit ( 40 ) seated into the wedge seating hole ( 31 ) of the wedge receiving body ( 30 ) and comprising the three separated wedge bodies ( 41 ), which are arranged in a cone shape to hold the tensioning steel wire ( 50 ); and   a second outer body ( 20 ) supporting and covering both the wedge receiving body ( 30 ), which is seated in the body seating hole ( 13 ) of the first outer body ( 10 ), and the wedge unit ( 40 ), which is placed in the wedge seating hole ( 31 ) of the wedge receiving body ( 30 ).   
   
   
       2 . An internal fixer for an anchor having a releasable tensioning steel wire, comprising:
 a first outer body ( 10 ), with a tube coupling hole ( 11 ) and a body seating hole ( 13 ) coaxially formed in the first outer body ( 10 ) so that the tensioning steel wire ( 50 ) passes therethrough, and wedge receiving body support means provided on an inner surface of the body seating hole ( 13 );   a wedge receiving body ( 30 ) seated by the wedge receiving body support means in the body seating hole ( 13 ) and having a conical wedge seating hole ( 31 ), in which separated wedge bodies ( 41 ) are seated;   a wedge unit ( 40 ) seated into the wedge seating hole ( 31 ) of the wedge receiving body ( 30 ) and comprising the three separated wedge bodies ( 41 ), which are arranged in a cone shape to hold the tensioning steel wire ( 50 );   a second outer body ( 20 ) supporting and covering the wedge receiving body ( 30 ), which is seated in the body seating hole ( 13 ) of the first outer body ( 10 ); and   an elastic support member ( 70 ) provided in the second outer body ( 20 ) and elastically supporting, pushing and seating the wedge unit ( 40 ), which is placed in the wedge seating hole ( 31 ) of the wedge receiving body ( 30 ), into the wedge seating hole ( 31 ).   
   
   
       3 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 1  or  2 , wherein the wedge receiving body support means of the first outer body ( 10 ) along with the second outer body ( 20 ) supports the wedge receiving body ( 30 ) while no tensile force is applied to the tensioning steel wire ( 50 ), and the wedge receiving body support means allows the wedge receiving body ( 30 ) to be advanced along with the wedge unit ( 40 ) and to be fastened when tensile force is applied to the tensioning steel wire ( 50 ) after the internal fixer is installed in ground. 
   
   
       4 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 3 , wherein the wedge receiving body support means comprises a support protrusion ( 13   a ) provided on the inner surface of the body seating hole ( 13 ). 
   
   
       5 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 3 , wherein the wedge receiving body support means is realized by a tapered inner surface of the body seating hole ( 13 ) which decreases in diameter from a deep portion thereof to a shallow portion thereof. 
   
   
       6 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 4  or  5 , wherein the tapered inner surface of the body seating hole ( 13 ) and the support protrusion ( 13   a ), which is provided on the inner surface of the body seating hole ( 13 ), are formed in ring shapes around an entire circumference of the body seating hole ( 13 ). 
   
   
       7 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 4  or  5 , wherein the tapered inner surface of the body seating hole ( 13 ) and the support protrusion ( 13   a ) respectively comprise a plurality of tapered inner surfaces of the body seating hole ( 13 ) and a plurality of support protrusions ( 13   a ), which are provided on the inner surface of the body seating hole ( 13 ) and are spaced apart from each other. 
   
   
       8 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 4 , wherein the support protrusion ( 13   a ) of the body seating hole ( 13 ) is multi-stepped. 
   
   
       9 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 3 , wherein the wedge receiving body support means comprises a support O-ring ( 14 ) provided in a ring groove ( 13   b ) formed in the inner surface of the body seating hole ( 13 ), such that, when the wedge receiving body ( 30 ) is advanced by the tensioning steel wire ( 50 ), the support O-ring ( 14 ), which has supported an end of the wedge receiving body ( 30 ), comes into close contact with and holds an outer surface of the wedge receiving body ( 30 ). 
   
   
       10 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 3 , wherein the wedge receiving body support means comprises a C-shaped metal ring ( 15 ), which elastically expands in diameter and is provided in a ring groove ( 13   b ) formed in the inner surface of the body seating hole ( 13 ), such that, when the wedge receiving body ( 30 ) is advanced by the tensioning steel wire ( 50 ), the C-shaped metal ring ( 15 ), which has supported an end of the wedge receiving body ( 30 ), holds an outer surface of the wedge receiving body ( 30 ). 
   
   
       11 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 10 , wherein a ring stop groove ( 32 ) is formed in the outer surface of the wedge receiving body ( 30 ), such that, when the wedge receiving body ( 30 ) is advanced, the metal ring ( 15 ) is locked to the ring stop groove ( 32 ). 
   
   
       12 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 10  or  11 , wherein the wedge receiving body support means comprises: the C-shaped metal ring ( 15 ) provided in a ring seating groove ( 33 ) of the wedge receiving body ( 30 ); and a ring stop groove ( 13   c ) formed in the inner surface of the wedge seating groove ( 13 ). 
   
   
       13 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 1  or  2 , further comprising:
 a wedge returning member ( 60 ) provided in the body seating hole ( 13 ) of the first outer body ( 10 ), so that, when the wedge receiving body ( 30 ) along with the wedge unit ( 40 ) is advanced and fastened to the body seating hole ( 13 ), the wedge unit ( 40 ), which is placed in the wedge seating hole ( 31 ) of the wedge receiving body ( 30 ), is biased backwards by the wedge returning member ( 60 ).   
   
   
       14 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 13 , wherein the wedge returning member ( 60 ) comprises a compression coil spring. 
   
   
       15 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 13  or  14 , further comprising:
 a support ring member ( 61 ), having a flange on an end thereof, provided on an end of the wedge returning member ( 60 ) to support lower ends of the separated wedge bodies ( 41 ).   
   
   
       16 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 13  or  14 , wherein a spring seating hole ( 17 ) is formed in a bottom of the body seating hole ( 13 ) so that the wedge returning member ( 60 ) is installed in the spring seating hole ( 17 ), and a support protrusion ( 17   a ) is provided on a bottom of the spring seating hole ( 17 ) to hold an end of the wedge returning member ( 60 ). 
   
   
       17 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 2 , further comprising:
 a cap member ( 45 ) fitted into an inner ring groove ( 43 ) formed in upper ends of the separated wedge bodies ( 41 ) constituting the wedge unit, so that an elastic support member ( 70 ) is fitted over the cap member ( 45 ) and the tensioning steel wire ( 50 ) is inserted more deeply.   
   
   
       18 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 2  or  17 , wherein the elastic support member ( 70 ) comprises a compression coil spring fitted over an outer surface of the cap member ( 45 ), which protrudes from the upper end of the wedge unit ( 40 ), without moving. 
   
   
       19 . The internal fixer for the anchor having the releasable tensioning steel wire according to  claim 2  or  17 , further comprising:
 a compression cover ( 71 ) provided between the separated wedge bodies ( 41 ) and the elastic support member ( 70 ) and seated on the separated wedge bodies ( 41 ) outside the cap member ( 45 ).