Rebar tying tool

Abstract

A rebar tying tool may include a feed unit configured to feed a wire, a guide unit configured to guide the wire such that the wire is wound around two or more rebars, a reel support member supporting a reel including the wire such that the reel is rotatable about a reel rotation axis, a wire guide member located between the feed unit and the reel support member and configured to guide the wire toward the feed unit, and a contact object configured to contact the wire in a direction in which the reel rotation axis extends, with the contact object located between the wire guide member and the reel support member.

What is claimed is: 
     
         1 . A rebar tying tool comprising:
 a feed unit configured to feed a wire;   a guide unit configured to guide the wire such that the wire is wound around two or more rebars;   a reel support member supporting a reel including the wire such that the reel is rotatable about a reel rotation axis;   a wire guide member located between the feed unit and the reel support member and configured to guide the wire toward the feed unit; and   a contact object configured to contact the wire in a direction in which the reel rotation axis extends, with the contact object located between the wire guide member and the reel support member.   
     
     
         2 . The rebar tying tool according to  claim 1 , further comprising a reel stopper configured to be switched between a prohibiting state in which the reel stopper prohibits the reel from being detached from the reel support member and a permitting state in which the reel stopper permits the reel to be detached from the reel support member,
 wherein the contact object is disposed on the reel stopper and configured to contact the wire when the reel stopper is in the prohibiting state.   
     
     
         3 . The rebar tying tool according to  claim 2 , wherein when the reel stopper is switched from the permitting state to the prohibiting state, the reel stopper moves in a first direction, and
 when the reel stopper is in the prohibiting state, the contact object is configured to contact the wire in the first direction with the contact object located between the wire guide member and the reel support member.   
     
     
         4 . The rebar tying tool according to  claim 2 , wherein the wire guide member comprises a wire guide hole through which the wire is configured to pass,
 in a view of the rebar tying tool along a line connecting a center of an inlet of the wire guide hole and a center of an outlet of the wire guide hole,   when the reel stopper is in the prohibiting state, the contact object blocks a part of the inlet of the wire guide hole, and   when the reel stopper is in the permitting state, the contact object does not block the inlet of the wire guide hole, or blocks a part of the inlet such that an area of a blocked portion of the inlet that is blocked by the contact object in the permitting state is smaller than an area of a blocked portion of the inlet that is blocked by the contact object when the reel stopper is in the prohibiting state.   
     
     
         5 . The rebar tying tool according to  claim 4 , further comprising a guide surface disposed along a rim of the inlet of the wire guide hole and configured to guide the wire into the inlet of the wire guide hole,
 wherein the guide surface faces the contact object when the reel stopper is in the prohibiting state.   
     
     
         6 . The rebar tying tool according to  claim 5 , further comprising a first guide wall separate from the wire guide member, wherein the first guide wall comprises the guide surface. 
     
     
         7 . The rebar tying tool according to  claim 5 , wherein the wire guide member comprises the guide surface. 
     
     
         8 . The rebar tying tool according to  claim 4 , wherein when the reel stopper is in the prohibiting state, in the view of the rebar tying tool along the line connecting the center of the inlet of the wire guide hole and the center of the outlet of the wire guide hole, the contact object blocks 50% or more of an entire area of the inlet of the wire guide hole. 
     
     
         9 . The rebar tying tool according to  claim 4 , wherein the wire guide hole comprises a frustum shape in which an entire area of the inlet is larger than an entire area of the outlet, and
 when the reel stopper is in the prohibiting state, in the view of the rebar tying tool along the line connecting the center of the inlet of the wire guide hole and the center of the outlet of the wire guide hole, the contact object blocks the inlet such that an area of a portion of the inlet that is not blocked by the contact object is less than the entire area of the outlet.   
     
     
         10 . The rebar tying tool according to  claim 2 , wherein the contact object is configured to rotate with respect to the reel stopper. 
     
     
         11 . The rebar tying tool according to  claim 10 , further comprising a housing supporting the reel stopper such that the reel stopper is configured to be switched between the prohibiting state and the permitting state,
 wherein the contact object comprises:
 a body portion configured to rotate; and 
 a shaft portion extending through the body portion and supported by the reel stopper, and 
   when the reel stopper is in the prohibiting state, under a state where the shaft portion extends through the body portion, the shaft portion is configured to contact the housing in a direction in which the shaft portion comes out of the body portion.   
     
     
         12 . The rebar tying tool according to  claim 10 , wherein the contact object is a roller, and
 diameters at both ends of the contact object are respectively larger than a diameter at a center of the contact object.   
     
     
         13 . The rebar tying tool according to  claim 2 , wherein the contact object is integrally formed with the reel stopper. 
     
     
         14 . The rebar tying tool according to  claim 1 , further comprising:
 a reel stopper configured to be switched between a prohibiting state in which the reel stopper prohibits the reel from being detached from the reel support member and a permitting state in which the reel stopper permits the reel to be detached from the reel support member;   a housing supporting the reel stopper such that the reel stopper is configured to be switched between the prohibiting state and the permitting state and supporting the contact object such that the contact object can move; and   an operation member supported by the reel stopper and configured to operate the contact object,   wherein when the reel stopper is switched from the permitting state to the prohibiting state, the operation member operates the contact object to switch the contact object from a non-contact state in which the contact object is not in contact with the wire to a contact state in which the contact object is configured to contact the wire.   
     
     
         15 . The rebar tying tool according to  claim 1 , wherein the contact object is made of a metal. 
     
     
         16 . The rebar tying tool according to  claim 1 , further comprising a reel stopper configured to be switched between a prohibiting state in which the reel stopper prohibits the reel from being detached from the reel support member and a permitting state in which the reel stopper permits the reel to be detached from the reel support member,
 wherein when the reel stopper is switched from the permitting state to the prohibiting state, the reel stopper moves in a first direction,   the contact object is disposed on the reel stopper, and   when the reel stopper is in the prohibiting state, the contact object is configured to contact the wire in the first direction with the contact object located between the wire guide member and the reel support member.   
     
     
         17 . A rebar tying tool comprising:
 a feed unit configured to feed a wire;   a guide unit configured to guide the wire such that the wire is wound around two or more rebars;   a reel support member supporting a reel including the wire such that the reel is rotatable about a reel rotation axis;   a wire guide member located between the feed unit and the reel support member and configured to guide the wire toward the feed unit;   a contact object configured to contact the wire with the contact object located between the wire guide member and the reel support member; and   a reel stopper configured to be switched between a prohibiting state in which the reel stopper prohibits the reel from being detached from the reel support member and a permitting state in which the reel stopper permits the reel to be detached from the reel support member,   wherein the wire guide member comprises a wire guide hole through which the wire is configured to pass,   in a view of the rebar tying tool along a line connecting a center of an inlet of the wire guide hole and a center of an outlet of the wire guide hole,   when the reel stopper is in the prohibiting state, the contact object blocks a part of the inlet of the wire guide hole, and   when the reel stopper is in the permitting state, the contact object does not block the inlet of the wire guide hole, or blocks a part of the inlet such that an area of a blocked portion of the inlet that is blocked by the contact object in the permitting state is smaller than an area of a blocked portion that is blocked by the contact object when the reel stopper is in the prohibiting state.   
     
     
         18 . A rebar tying tool comprising:
 a feed unit configured to feed a wire;   a guide unit configured to guide the wire such that the wire is wound around two or more rebars;   a reel support member supporting a reel including the wire such that the reel is rotatable about a reel rotation axis; and   a wire guide wall located between the feed unit and the reel support member and configured to guide the wire toward the feed unit,   wherein the reel comprises a bobbin including a bobbin body around which the wire is wound, a first flange located at one end of the bobbin body in a direction in which the reel rotation axis extends, and a second flange located at the other end of the bobbin body in the direction in which the reel rotation axis extends,   the wire guide wall comprises:
 a first wire contact portion configured to contact the wire when the wire is drawn out from a position adjacent to the first flange; and 
 a second wire contact portion configured to contact the wire when the wire is drawn out from a position adjacent to the second flange, and 
   when a direction in which the wire moving toward the feed unit passes through the wire guide wall is defined as a second direction and a direction opposite to the second direction is defined as a third direction,   each of the first wire contact portion and the second wire contact portion is offset to the third direction as they are seen along a virtual plane bisecting the wire guide wall in the second direction and the third direction.   
     
     
         19 . The rebar tying tool according to  claim 18 , wherein when a direction from the second flange to the first flange along the direction in which the reel rotation axis extends is defined as a fourth direction and a direction from the first flange to the second flange along the direction in which the reel rotation axis extends is defined as a fifth direction,
 an end of the wire guide wall in the third direction, which is located in the fourth direction as viewed from the wire passing through the wire guide wall, functions as the first wire contact portion, and   an end of the wire guide wall in the third direction, which is located in the fifth direction as viewed from the wire passing through the wire guide wall, functions as the second wire contact portion.   
     
     
         20 . The rebar tying tool according to  claim 3 , wherein
 the wire guide member comprises a wire guide hole through which the wire is configured to pass,   in a view of the rebar tying tool along a line connecting a center of an inlet of the wire guide hole and a center of an outlet of the wire guide hole,   when the reel stopper is in the prohibiting state, the contact object blocks a part of the inlet of the wire guide hole,   when the reel stopper is in the permitting state, the contact object does not block the inlet of the wire guide hole, or blocks a part of the inlet such that an area of a blocked portion of the inlet that is blocked by the contact object in the permitting state is smaller than an area of a blocked portion of the inlet that is blocked by the contact object when the reel stopper is in the prohibiting state,   the rebar tying tool further comprises a guide surface disposed along a rim of the inlet of the wire guide hole and configured to guide the wire into the inlet of the wire guide hole,   the guide surface faces the contact object when the reel stopper is in the prohibiting state,   the rebar tying tool further comprises a first guide wall separate from the wire guide member, wherein the first guide wall comprises the guide surface,   when the reel stopper is in the prohibiting state, in the view of the rebar tying tool along the line connecting the center of the inlet of the wire guide hole and the center of the outlet of the wire guide hole, the contact object blocks 50% or more of an entire area of the inlet of the wire guide hole,   the contact object is configured to rotate with respect to the reel stopper,   the rebar tying tool further comprises a housing supporting the reel stopper such that the reel stopper is configured to be switched between the prohibiting state and the permitting state,   the contact object comprises:
 a body portion configured to rotate; and 
 a shaft portion extending through the body portion and supported by the reel stopper, 
   when the reel stopper is in the prohibiting state, under a state where the shaft portion extends through the body portion, the shaft portion is configured to contact the housing in a direction in which the shaft portion comes out of the body portion, and   the contact object is made of a metal.