The method comprises a braiding step during which a braiding wire is wound in helical turns about, and along, a generatrix line which is closed in a ring about a main axis, so as to form a bead wire element called “braided torus” within which the braid wire has, on the one hand, a winding section which corresponds to the helical turns and which occupies a braid volume, and, on the other hand, in an extension of said winding section, a surplus length of braid wire called “excess section”. After the braiding step, there is a folding step during which the excess section is plastically deformed by folding, preferably by means of a punch and an anvil, so as to form an elbow which makes the excess section diverge with respect to the helical turns and makes said excess section protrude at least partly with respect to the braid volume.

The method comprises a braiding step during which a braiding wire is wound in helical turns about, and along, a generatrix line which is closed in a ring about a main axis, so as to form a bead wire element called “braided torus” within which the braid wire has, on the one hand, a winding section which corresponds to the helical turns and which occupies a braid volume, and, on the other hand, in an extension of said winding section, a surplus length of braid wire called “excess section”. After the braiding step, there is a folding step during which the excess section is plastically deformed by folding, preferably by means of a punch and an anvil, so as to form an elbow which makes the excess section diverge with respect to the helical turns and makes said excess section protrude at least partly with respect to the braid volume.

A method for manufacturing a straight steel monofilament for the reinforcement of belt ply of a pneumatic tyre, where the arc-height of the straight steel monofilament is less than 30 mm. The steel monofilament is plastically deformed by a twisting along the axis of the steel monofilament on a double-twist apparatus. The plastic twist deformation eliminates the surface stress difference on the steel monofilament and provides a strainght steel monofilament for belt ply reinforcement. This provides a simple solution with existing apparatus to manufacture straight steel monofilament suitable for tire reinforcement with high speed for mass production.

A method for manufacturing a straight steel monofilament for the reinforcement of belt ply of a pneumatic tyre, where the arc-height of the straight steel monofilament is less than 30 mm. The steel monofilament is plastically deformed by a twisting along the axis of the steel monofilament on a double-twist apparatus. The plastic twist deformation eliminates the surface stress difference on the steel monofilament and provides a strainght steel monofilament for belt ply reinforcement. This provides a simple solution with existing apparatus to manufacture straight steel monofilament suitable for tire reinforcement with high speed for mass production.

A binding machine includes: a wire feeding unit; a curl forming unit; a cutting unit; a binding unit; a motor; and a control unit. The binding unit includes: a rotary shaft to be driven by the motor; a wire engaging body configured to engage the wire and to rotate together with the rotary shaft, thereby twisting the wire; and a rotation regulation part configured to regulate rotation of the wire engaging body. The control unit is configured to control stop of the motor rotating in a direction of twisting the wire, based on a position in a rotation direction of the wire engaging body and a position at which the rotation of the wire engaging body can be regulated by the rotation regulation part.

A binding machine includes: a wire feeding unit; a curl forming unit; a cutting unit; a binding unit; a motor; and a control unit. The binding unit includes: a rotary shaft to be driven by the motor; a wire engaging body configured to engage the wire and to rotate together with the rotary shaft, thereby twisting the wire; and a rotation regulation part configured to regulate rotation of the wire engaging body. The control unit is configured to control stop of the motor rotating in a direction of twisting the wire, based on a position in a rotation direction of the wire engaging body and a position at which the rotation of the wire engaging body can be regulated by the rotation regulation part.

A binding machine includes: a wire feeding unit; a curl forming unit; a butting part; a cutting unit; and a binding unit. The binding unit includes a rotary shaft; a wire engaging body configured to move in an axis direction of the rotary shaft and to engage the wire in a first operation area in the axis direction of the rotary shaft, and configured to move in the axis direction of the rotary shaft and to twist the wire with rotating together with the rotary shaft in a second operation area in the axis direction of the rotary shaft; a rotation regulation part configured to regulate rotation of the wire engaging body; and a tension applying part configured to perform, in the second operation area, operations of applying tension and releasing the applied tension on the wire engaged by the wire engaging body in the first operation area.

A binding machine includes: a wire feeding unit; a curl forming unit; a butting part; a cutting unit; and a binding unit. The binding unit includes a rotary shaft; a wire engaging body configured to move in an axis direction of the rotary shaft and to engage the wire in a first operation area in the axis direction of the rotary shaft, and configured to move in the axis direction of the rotary shaft and to twist the wire with rotating together with the rotary shaft in a second operation area in the axis direction of the rotary shaft; a rotation regulation part configured to regulate rotation of the wire engaging body; and a tension applying part configured to perform, in the second operation area, operations of applying tension and releasing the applied tension on the wire engaged by the wire engaging body in the first operation area.

It provides a reinforcing bar binding machine which reduces restrictions on a moving direction of the reinforcing bar binding machine in an operation of pulling out a reinforcing bar bound with a wire. A reinforcing bar binding machine (1A) includes a curl guide unit (5A) that winds a wire (W) around a reinforcing bar (S), a wire feeding unit (3A) that feeds the wire (W), and a binding unit (7A) that twists crossing portions between one end and the other end of the wire (W) wound around the reinforcing bar (S). The curl guide unit (5A) includes a first guide unit (50) that curls the wire (W) fed by the feeding unit (3A) and a second guide unit (51) that guides the wire (W) fed from the first guide unit (50) to the binding unit (7A), and the second guide unit (51) includes a fixed guide unit (54) that restricts a position in a radial direction of the wire (W) wound around the reinforcing bar (S) and a movable guide unit (55) that restricts a position in an axial direction of the wire (W) wound around the reinforcing bar (S).

It provides a reinforcing bar binding machine which reduces restrictions on a moving direction of the reinforcing bar binding machine in an operation of pulling out a reinforcing bar bound with a wire. A reinforcing bar binding machine (1A) includes a curl guide unit (5A) that winds a wire (W) around a reinforcing bar (S), a wire feeding unit (3A) that feeds the wire (W), and a binding unit (7A) that twists crossing portions between one end and the other end of the wire (W) wound around the reinforcing bar (S). The curl guide unit (5A) includes a first guide unit (50) that curls the wire (W) fed by the feeding unit (3A) and a second guide unit (51) that guides the wire (W) fed from the first guide unit (50) to the binding unit (7A), and the second guide unit (51) includes a fixed guide unit (54) that restricts a position in a radial direction of the wire (W) wound around the reinforcing bar (S) and a movable guide unit (55) that restricts a position in an axial direction of the wire (W) wound around the reinforcing bar (S).