The present invention has an object of providing a pneumatic tire that exhibits better uniformity by improving the wire wound body for constituting the bead core. The pneumatic tire 1 comprises a bead core 5 comprising a wire wound body 10 in which one bead wire 10a is spirally wound in a continuous around a tire rotational axis CL so that a plurality of layers of the bead wire are formed in a radial direction of the tire. The wire wound body 10 comprises a first part 13 and a second part 14. The first part 13 comprises a plurality of layers of the bead wire 10a each circumferentially extending with a constant radius from the tire rotational axis CL. The second part comprises a plurality of layers of the bead wire 10a each circumferentially extending while changing its radius from the tire rotational axis CL.

Provided are a pneumatic tire and a method for manufacturing the pneumatic tire. A partial tie rubber layer is selectively disposed in each region between a carcass layer and an innerliner layer and on both sides in a tire lateral direction of a tread portion excluding a center region of the tread portion. End portions on both sides of the partial tie rubber layers in the tire lateral direction form inclined surfaces acutely angled with respect to a surface of the partial tie rubber layer on the carcass layer side. The inclined surfaces have an inclination angle from 20° to 60° with respect to the surface of the partial tie rubber layer on the carcass layer side.

Provided are a pneumatic tire and a method for manufacturing the pneumatic tire. A partial tie rubber layer is selectively disposed in each region between a carcass layer and an innerliner layer and on both sides in a tire lateral direction of a tread portion excluding a center region of the tread portion. End portions on both sides of the partial tie rubber layers in the tire lateral direction form inclined surfaces acutely angled with respect to a surface of the partial tie rubber layer on the carcass layer side. The inclined surfaces have an inclination angle from 20° to 60° with respect to the surface of the partial tie rubber layer on the carcass layer side.

The present invention has an object of providing a pneumatic tire that exhibits better uniformity by improving the wire wound body for constituting the bead core. The pneumatic tire 1 comprises a bead core 5 comprising a wire wound body 10 in which one bead wire 10a is spirally wound in a continuous around a tire rotational axis CL so that a plurality of layers of the bead wire are formed in a radial direction of the tire. The wire wound body 10 comprises a first part 13 and a second part 14. The first part 13 comprises a plurality of layers of the bead wire 10a each circumferentially extending with a constant radius from the tire rotational axis CL. The second part comprises a plurality of layers of the bead wire 10a each circumferentially extending while changing its radius from the tire rotational axis CL.

The present invention has an object of providing a pneumatic tire that exhibits better uniformity by improving the wire wound body for constituting the bead core. The pneumatic tire 1 comprises a bead core 5 comprising a wire wound body 10 in which one bead wire 10a is spirally wound in a continuous around a tire rotational axis CL so that a plurality of layers of the bead wire are formed in a radial direction of the tire. The wire wound body 10 comprises a first part 13 and a second part 14. The first part 13 comprises a plurality of layers of the bead wire 10a each circumferentially extending with a constant radius from the tire rotational axis CL. The second part comprises a plurality of layers of the bead wire 10a each circumferentially extending while changing its radius from the tire rotational axis CL.

Provided are a pneumatic tire and a method for manufacturing the pneumatic tire. A partial tie rubber layer is selectively disposed in each region between a carcass layer and an innerliner layer and on both sides in a tire lateral direction of a tread portion excluding a center region of the tread portion. End portions on both sides of the partial tie rubber layers in the tire lateral direction form inclined surfaces acutely angled with respect to a surface of the partial tie rubber layer on the carcass layer side. The inclined surfaces have an inclination angle from 20 to 60 with respect to the surface of the partial tie rubber layer on the carcass layer side.

Provided are a pneumatic tire and a method for manufacturing the pneumatic tire. A partial tie rubber layer is selectively disposed in each region between a carcass layer and an innerliner layer and on both sides in a tire lateral direction of a tread portion excluding a center region of the tread portion. End portions on both sides of the partial tie rubber layers in the tire lateral direction form inclined surfaces acutely angled with respect to a surface of the partial tie rubber layer on the carcass layer side. The inclined surfaces have an inclination angle from 20 to 60 with respect to the surface of the partial tie rubber layer on the carcass layer side.

A tire bead carcass member manufacturing step includes a ply turning-up step, a ply layering step, and a ply turning-down step. In the ply turning-down step, an outer circumferential surface 32a of a ply layered body 32 is supported. While the ply layered body 32 is rotated, a turning-down stitcher 38 turns down axial end portions of a second ply around beads from the radially outer side toward the radially inner side. While the ply layered body 32 is rotated, a layering stitcher 40 operates so as to layer the axial end portions of the second ply having been turned down to an inner side of the ply layered body 32, over an inner circumferential surface of a first ply, to form the bead carcass member.

A tire bead carcass member manufacturing step includes a ply turning-up step, a ply layering step, and a ply turning-down step. In the ply turning-down step, an outer circumferential surface 32a of a ply layered body 32 is supported. While the ply layered body 32 is rotated, a turning-down stitcher 38 turns down axial end portions of a second ply around beads from the radially outer side toward the radially inner side. While the ply layered body 32 is rotated, a layering stitcher 40 operates so as to layer the axial end portions of the second ply having been turned down to an inner side of the ply layered body 32, over an inner circumferential surface of a first ply, to form the bead carcass member.