A reinforcing bar binding machine includes a magazine in which two wires are housed in a drawable manner; a curl guide unit that winds the juxtaposed wires around the reinforcing bars and a wire feeding unit that winds the wires around the reinforcing bars with the curl guide unit in an operation of juxtaposing and feeding the wires so that the wires are wound around the reinforcing bars. In addition, the binding machine includes a binding unit that twists crossing portions of one end side and the other end side of each of the wires wound around the reinforcing bars. The binding unit further includes a bending portion that bends the one end side and the other end side of each of the wires, which are wound around the reinforcing bars, toward the reinforcing bars.

An apparatus configured to twist a first wire about a second wire is presented herein. The apparatus includes a securing mechanism configured to secure ends of the first wire and the second wire. The first wire is arranged parallel to the second wire along a longitudinal axis. The apparatus also includes a gripping mechanism configured to grip central portions of the first and second wires such that inner surfaces of the central portions of the first and second wires are in contact with one another and a rotating mechanism configured to rotate the gripping mechanism, thereby twisting the first and second wires about one another. A method of twisting a first wire about a second wire is also presented herein.

A binding machine includes a wire feeding unit configured to feed a wire, a curl guide configured to curl the wire fed by the wire feeding unit around an object to be bound, a binding unit including a twisting shaft provided to be rotatable around a predetermined axis, and a gripping part provided at one end side of the twisting shaft, wherein the gripping part is configured to grip the wire curled by the curl guide and the twisting shaft is configured to twist the gripped wire so as to bind the object, a binding machine main body having one end side at which the curl guide is arranged and configured to accommodate therein the wire feeding unit and the binding unit, and a setting unit provided at an opposite end side of the binding machine main body and configured to set a predetermined operation condition.

A binding machine includes a wire feeding unit configured to feed a wire, a curl guide configured to curl the wire fed by the wire feeding unit around an object to be bound, a binding unit including a twisting shaft provided to be rotatable around a predetermined axis, and a gripping part provided at one end side of the twisting shaft, wherein the gripping part is configured to grip the wire curled by the curl guide and the twisting shaft is configured to twist the gripped wire so as to bind the object, a binding machine main body having one end side at which the curl guide is arranged and configured to accommodate therein the wire feeding unit and the binding unit, and a setting unit provided at an opposite end side of the binding machine main body and configured to set a predetermined operation condition.

A rebar tying tool may include a twisting mechanism, a body, a grip, and a control board. The twisting mechanism may include a twisting motor and a holder configured to twist a wire around rebus by operation of the twisting motor. The body may house the twisting mechanism. The grip may be disposed below the body and configured to be gripped by an operator. The control board may be configured to control the operation of the twisting motor. The control board may be disposed below a connection between the grip and the body.

A reinforcing bar binding machine includes a first movable gripping member that is displaced in a direction to come in contact with and separate from one side of a fixed gripping member. A second movable gripping member is displaced in a direction to come in contact with and separate from the other side of the fixed gripping member; and a bending portion brings the first movable gripping member and the second movable gripping member into and out of contact with the fixed gripping member. The fixed gripping member includes a shaft that rotatably supports the first movable gripping member and the second movable gripping member. In addition, the bending portion includes an opening and closing pin that pushes an opening and closing guide hole provided in the first movable gripping member and an opening and closing guide hole provided in the second movable gripping member.

A reinforcing bar binding machine includes a first movable gripping member that is displaced in a direction to come in contact with and separate from one side of a fixed gripping member. A second movable gripping member is displaced in a direction to come in contact with and separate from the other side of the fixed gripping member; and a bending portion brings the first movable gripping member and the second movable gripping member into and out of contact with the fixed gripping member. The fixed gripping member includes a shaft that rotatably supports the first movable gripping member and the second movable gripping member. In addition, the bending portion includes an opening and closing pin that pushes an opening and closing guide hole provided in the first movable gripping member and an opening and closing guide hole provided in the second movable gripping member.

A binding machine includes a wire feeding unit which feeds a wire, a curl guide which curls the fed wire around an object to be bound, a binding unit including a twisting shaft provided to be rotatable around an axis, a gripping part provided at one end of the twisting shaft and a drive unit provided to the other end of the twisting shaft, a control unit which controls the drive unit, and a binding machine main body which accommodates therein the binding unit and the control unit. When an inside of the binding machine main body is divided by a virtual plane perpendicular to the axis to be partitioned into a first space in which the gripping part is accommodated and a second space in which the drive unit is accommodated, the control unit is arranged in the second space in which the drive unit is accommodated.

A binding machine includes a wire feeding unit which feeds a wire, a curl guide which curls the fed wire around an object to be bound, a binding unit including a twisting shaft provided to be rotatable around an axis, a gripping part provided at one end of the twisting shaft and a drive unit provided to the other end of the twisting shaft, a control unit which controls the drive unit, and a binding machine main body which accommodates therein the binding unit and the control unit. When an inside of the binding machine main body is divided by a virtual plane perpendicular to the axis to be partitioned into a first space in which the gripping part is accommodated and a second space in which the drive unit is accommodated, the control unit is arranged in the second space in which the drive unit is accommodated.

A binding machine includes a curl guide configured to guide a wire in a loop shape around a binding target and a twisting part configured to bind the binding target by twisting the wire guided in the loop shape around the binding target. The curl guide has a tapered protrusion at a tip end-side.