A rebar binding machine comprises a curl guide that causes a wire to curl, a torsion part including a torsion shaft for twisting the curled wire, and a pair of grips that can be grasped by an operator. The grips are provided to the two axial sides of the torsion shaft as viewed from the operator side when the operator grasps the grips to perform an operation, and it is possible to change the height of the grips in the axial direction of the torsion shaft.

A rebar binding machine comprises a curl guide that causes a wire to curl, a torsion part including a torsion shaft for twisting the curled wire, and a pair of grips that can be grasped by an operator. The grips are provided to the two axial sides of the torsion shaft as viewed from the operator side when the operator grasps the grips to perform an operation, and it is possible to change the height of the grips in the axial direction of the torsion shaft.

A rebar tying tool (2; 302; 402) include a feed mechanism (24), which includes a first motor (32; 304) and feeds a wire (W), and a twisting mechanism, which includes a second motor (76; 306) and twists together one or more portions of the wire. A control unit (202; 350) controls the first motor and the second motor and includes a general-purpose I/O port (202c; 350c) and a motor-control-signal output port (202a; 350a). A motor-control-signal-output-destination-switching circuit (204; 310; 406) inputs motor-control signals (UH, VH, WH, UL, VL, WL) from the control unit via the motor-control-signal output port and selectively outputs the inputted motor-control signals to either the first motor or the second motor in response to input of a switching signal (SW).

A system for mounting an anchor bolt to formwork or other structures associated with concrete construction includes a main body and latch coupled to the main body. The anchor bolt can pass through the main body and the latch can be moved so that threads formed in the latch engage threads formed in the anchor bolt to secure the anchor bolt in position as concrete is poured around the anchor bolt. The main body and the latch can have through holes for receiving a nail to lock the position of the latch with respect to the main body.

A system for mounting an anchor bolt to formwork or other structures associated with concrete construction includes a main body and latch coupled to the main body. The anchor bolt can pass through the main body and the latch can be moved so that threads formed in the latch engage threads formed in the anchor bolt to secure the anchor bolt in position as concrete is poured around the anchor bolt. The main body and the latch can have through holes for receiving a nail to lock the position of the latch with respect to the main body.

A reinforcing bar binding machine capable of reliably performing a wire gripping operation includes a first movable gripping member that is displaced in a direction to contact with and separate from one side of a fixed gripping member and a second movable gripping member that is displaced in a direction to contact with and separate from the other side of the fixed gripping member. 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. Further, 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 method of spicing together and joining ends of a first member and a second member includes the steps of: arranging the ends of the first member and the second member in side-by-side manner; placing a coupling sleeve over the ends of the first member and the second member; and using a portable, hot-swaged coupling device to heat and crimp the coupling sleeve about the ends of the first and second member, thereby joining the ends of the first and second members.

A tool for manufacturing of a reinforcement bar structure, wherein the tool comprises a main body, a jaw arrangement, a tying device and an arrangement configured for moving the jaw arrangement between a gripping state and a tying state. A system for manufacturing a reinforcement bar structure, wherein the system comprises a supply of reinforcement bar material, a bending apparatus, a holding apparatus and a group of robots wherein at least one robot of the group of robots is equipped with the tool for manufacturing a reinforcement bar structure. A method for transporting and attaching a reinforcement bar during manufacturing of a reinforcement bar structure using a tool comprising a main body, the method comprising gripping a reinforcement bar, tying together the reinforcement bar with another reinforcement bar by looping a wire around the reinforcement bars, tightening the wire around the reinforcement bars, forming a knot, and cutting the wire.

A method to strengthen or repair concrete and other structures comprises securing a plate having a shape memory alloy (SMA) wire embedded therein to a localized region of a structure. The SMA wire has a deformed shape configured for self-anchorage within the plate. The SMA wire is heated at or above an austenite transformation temperature, and the SMA wire resists shape recovery and remains self-anchored within the plate. Accordingly, a compressive force is generated within the SMA wire and transferred to the plate. At an interface between the plate and the localized region of the structure, the compressive force is transmitted from the plate to the structure, thereby providing localized prestressing of the structure.

A method to strengthen or repair concrete and other structures comprises securing a plate having a shape memory alloy (SMA) wire embedded therein to a localized region of a structure. The SMA wire has a deformed shape configured for self-anchorage within the plate. The SMA wire is heated at or above an austenite transformation temperature, and the SMA wire resists shape recovery and remains self-anchored within the plate. Accordingly, a compressive force is generated within the SMA wire and transferred to the plate. At an interface between the plate and the localized region of the structure, the compressive force is transmitted from the plate to the structure, thereby providing localized prestressing of the structure.