Rebar tying machine and method for tying

Abstract

A rebar tying machine may include a feeding unit configured to feed a wire; a guide unit configured to guide the wire around rebars; a cutter configured to cut the wire; a clamp configured to be rotatable about a center axis and hold the wire; a main body housing supporting the feeding unit; and a bending member configured to bend an end portion of the wire toward the rebars, wherein the end portion of the wire is formed by the cutter cutting the wire. The bending member may be configured to bend the end portion of the wire toward the rebars while the wire is twisted by rotation of the clamp.

What is claimed is: 
     
         1 . A rebar tying machine comprising:
 a feeding unit configured to feed a wire;   a guide unit configured to guide the wire around rebars;   a cutter configured to cut the wire;   a clamp configured to be rotatable about a center axis and hold the wire;   a main body housing supporting the feeding unit; and   a bending member configured to bend an end portion of the wire toward the rebars, wherein the end portion of the wire is formed by the cutter cutting the wire,   wherein   the bending member is configured to bend the end portion of the wire toward the rebars while the wire is twisted by rotation of the clamp.   
     
     
         2 . The rebar tying machine according to  claim 1 , wherein the bending member is immovable relative to the main body housing. 
     
     
         3 . The rebar tying machine according to  claim 1 , wherein
 the center axis extends in a front-rear direction,   the clamp is located rearward of the rebars,   the bending member includes a contact surface inclined to the center axis in the front-rear direction, wherein the contact surface contacts the end portion of the wire while the wire is twisted by the rotation of the clamp, and   a front end of the contact surface is farther away from the center axis than a rear end of the contact surface is.   
     
     
         4 . The rebar tying machine according to  claim 3 , wherein the contact surface is gradually farther away from the center axis from the rear end toward the front end of the contact surface. 
     
     
         5 . The rebar tying machine according to  claim 3 , wherein the contact surface is curved. 
     
     
         6 . The rebar tying machine according to  claim 3 , wherein the contact surface is located forward of the cutter. 
     
     
         7 . The rebar tying machine according to  claim 3 , wherein the contact surface is located closer to the center axis than the cutter is. 
     
     
         8 . The rebar tying machine according to  claim 1 , wherein the bending member is fixed to the guide unit. 
     
     
         9 . The rebar tying machine according to  claim 8 , wherein the bending member defines a part of a wire passage through which the wire passes, between the bending member and the guide unit. 
     
     
         10 . A method for tying rebars with a wire, comprising:
 winding the wire around the rebars;   holding a leading end of the wire;   cutting the wire;   twisting the wire around the rebars; and   bending an end portion of the wire towards the rebars, wherein the end portion of the wire is formed by cutting the wire,   wherein   the bending of the end portion of the wire is executed during the twisting of the wire.   
     
     
         11 . A rebar tying machine comprising:
 a feeding unit configured to feed a wire;   a guide unit configured to guide the wire around rebars;   a cutter configured to cut the wire;   a twisting unit configured to hold and twist the wire;   a main body housing supporting the feeding unit; and   a bending member separate from the twisting unit, wherein the bending member is fixed in position relative to the main body housing and configured to bend an end portion of the wire toward the rebars, and the end portion of the wire is formed by the cutter cutting the wire,   wherein   the bending member is configured to bend the end portion of the wire toward the rebars after the cutter has cut the wire and before the twisting unit finishes twisting the wire.   
     
     
         12 . The rebar tying machine according to  claim 11 , wherein
 a center axis of the twisting unit extends in a front-rear direction,   the twisting unit is located rearward of the rebars,   the bending member includes a contact surface inclined to the center axis in the front-rear direction, wherein the contact surface contacts the end portion of the wire while the wire is twisted by the twisting unit, and   a front end of the contact surface is farther away from the center axis than a rear end of the contact surface is.   
     
     
         13 . The rebar tying machine according to  claim 12 , wherein the contact surface is gradually farther away from the center axis from the rear end toward the front end of the contact surface. 
     
     
         14 . The rebar tying machine according to  claim 12 , wherein the contact surface is curved. 
     
     
         15 . The rebar tying machine according to  claim 12 , wherein the contact surface is located forward of the cutter. 
     
     
         16 . The rebar tying machine according to  claim 12 , wherein the contact surface is located closer to the center axis than the cutter is. 
     
     
         17 . The rebar tying machine according to  claim 11 , wherein the bending member is fixed to the guide unit. 
     
     
         18 . The rebar tying machine according to  claim 17 , wherein the bending member defines a part of a wire passage through which the wire passes, between the bending member and the guide unit. 
     
     
         19 . The rebar tying machine according to  claim 2 , wherein
 the center axis extends in a front-rear direction,   the clamp is located rearward of the rebars,   the bending member includes a contact surface inclined to the center axis in the front-rear direction,   the contact surface contacts the end portion of the wire while the wire is twisted by the rotation of the clamp,   a front end of the contact surface is farther away from the center axis than a rear end of the contact surface is,   the contact surface is gradually farther away from the center axis from the rear end toward the front end of the contact surface,   the contact surface is curved,   the contact surface is located forward of the cutter,   the contact surface is located closer to the center axis than the cutter is,   the bending member is fixed to the guide unit, and   the bending member defines a part of a wire passage through which the wire passes, between the bending member and the guide unit.