Rebar tying tool

Abstract

A rebar tying tool ties together two or more rebars using a wire. The rebar tying tool may include: a reel having the wire wound on a bobbin; a reel-holding part configured to hold the reel in a rotatable manner; a feed part configured to advance the wire from the reel by a number of turns of the wire around the rebars; and a twisting part configured to twist the wire after the number of turns of the wire has been wound around the rebars. The wire preferably has a maximum tensile load of at least 1000 N and a yield-point load of at least 550 N.

1 . A rebar tying tool configured to tie together rebars using a wire, comprising:
 a reel having the wire wound on a bobbin;   a reel-holding part configured to hold the reel in a rotatable manner;   a feed part configured to advance the wire from the reel by a number of turns of the wire around the rebars; and   a twisting part configured to twist the wire after the number of turns of the wire has been wound around the rebars;   wherein the rebar tying tool is configured such that the following two conditions are satisfied:   the wire has a maximum tensile load of at least 1000 N; and   the wire has a yield-point load of at least 550 N.   
     
     
         2 . The rebar tying tool according to  claim 1 , wherein the wire is composed of stainless steel. 
     
     
         3 . (canceled) 
     
     
         4 . The rebar tying tool according to  claim 1 , wherein:
 the twisting part comprises a tip-holding part configured to hold a tip of the wire that has been advanced around the rebars; and   the feed part is configured to draw back the wire after the tip-holding part holds the tip of the wire and before the twisting part twists the wire.   
     
     
         5 . The rebar tying tool according to  claim 1 , wherein the wire has a diameter of at least 1.6 mm. 
     
     
         6 . The rebar tying tool according to  claim 1 , wherein a trunk part of the bobbin has a diameter of at least 50 mm. 
     
     
         7 . The rebar tying tool according to  claim 1 , wherein:
 the feed part comprises feed rollers configured to advance the wire by rotating; and   the feed rollers have a hardness of at least 56 HRC.   
     
     
         8 . The rebar tying tool according to  claim 7 , further comprising:
 a cutting part comprising cutters configured to cut the wire;   wherein the cutters have a hardness of at least 56 HRC.   
     
     
         9 . The rebar tying tool according to  claim 1 , further comprising:
 a grip configured to be grasped by a user during a rebar tying operation to perform the rebar tying operation in a hand-held state.   
     
     
         10 . The rebar tying tool according to  claim 2 , wherein:
 the twisting part comprises a tip-holding part configured to hold a tip of the wire that has been advanced around the rebars; and   the feed part is configured to draw back the wire after the tip-holding part holds the tip of the wire and before the twisting part twists the wire.   
     
     
         11 . The rebar tying tool according to  claim 10 , wherein:
 the wire has a diameter of at least 1.6 mm;   a trunk part of the bobbin has a diameter of at least 50 mm;   the feed part comprises feed rollers configured to advance the wire by rotating, the feed rollers having a hardness of at least 56 HRC; and   further comprising:   a cutting part comprising cutters configured to cut the wire, the cutters having a hardness of at least 56 HRC; and   a grip configured to be grasped by a user during a rebar tying operation to perform the rebar tying operation in a hand-held state.   
     
     
         12 .- 19 . (canceled)