Abstract: A pneumatic tire has a plurality of main grooves extending in a tire circumferential direction, and a plurality of land lines defined by the plurality of main grooves in a tread face. At least one of the plurality of land lines extends outward in a tire diametrical direction from a tread profile. A plurality of lateral grooves or notches are formed at intervals in the tire circumferential direction in the at least one land line. Each of blocks formed between the lateral grooves or the notches has a protruding height from the tread profile that increases from circumferential opposite end portions toward a circumferential central portion of the block.

Abstract: A pneumatic tire has a tread face, a plurality of main grooves extending in a tire circumferential direction in the tread face, and a plurality of land lines defined by the plurality of main grooves on the tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A top face of a central portion of the land line in a width direction is formed in an arc shape protruding outward in the tire diametrical direction in a section along a tire meridian. Top faces of opposite end portions of the land line in the width direction are formed in arc shapes protruding inward in the tire diametrical direction in the section along the tire meridian.

Abstract: A pneumatic tire has a plurality of main grooves extending in a tire circumferential directions and a plurality of land lines defined by the plurality of main grooves, on a tread face. At least one of the plurality of land lines protrudes outward in a tire diametrical direction from a profile line. A void ratio of a first area positioned on one side of a center of a width of the at least one land line is larger than a void ratio of a second area positioned on the other side. A protruding height of the second area from the profile line is larger than a protruding height of the first area.

Abstract: A manufacturing method for manufacturing a sheet-like belt 8b from a master roll first and then forming a cylindrical belt by winding the sheet-like belt 8b around a molding drum includes measuring a length of the sheet-like belt 8b, and making a pass of fail determination as to the length of the sheet-like belt 8b. The sheet-like belt 8b is wound around a winding cylinder 50 and transported to a place for lamination to the molding drum only when a pass determination is made in the step of making a pass or fail determination as to the length of the sheet-like belt 8b.

Abstract: A manufacturing method includes cutting out a sheet-like belt for one full circle of tire by cutting a master roll diagonally with respect to a longitudinal direction between a master roll table 10 and a belt table 14, moving the belt table 14 carrying the cut-out sheet-like belt to a winding position of the sheet-like belt, winding the sheet-like belt around a winding cylinder 50 at the winding position, and unwinding the sheet-like belt from the winding cylinder 50 in a place facing a molding drum 64 and forming a cylindrical belt by winding the sheet-like belt around the molding drum 64.

Abstract: In a winding method of a sheet member for winding a sheet member having an inclined side portion 7a inclined with respect to a longitudinal direction at least on one side in the longitudinal direction around a winding cylinder 50 in more than one turn from a tip end of the inclined side portion 7a as a winding start tip, winding of the sheet member is started in a small-diameter portion 51a of the winding cylinder 50 to which a radial difference is given by providing a step 54 to make a diameter smaller on one side in an axial direction and larger on the other side in the axial direction.

Abstract: During manufacturing of a tire component that includes a process of adhering a sheet-like rubber member 8b that is held by a supply section 30 to a drum 22, positions of ends 7d1, 7d2 n a width direction of the sheet-like rubber member 8b are detected by using sensors 52, 54 provided between the supply section 30 and the drum 22, and the supply section 30 is moved in a width direction X of the sheet-like rubber member 8b in accordance with the detected positions, so as to adhere the sheet-like rubber member 8b to a specified position on the drum 22.

Abstract: A winding method includes: attracting a sheet-like belt 8b onto a table 14 by multiple attracting means 15 lined up in a longitudinal direction of the sheet-like belt 8b; and winding the sheet-like belt 8b around a winding cylinder 50 by moving the winding cylinder 50 in the longitudinal direction of the sheet-like belt 8b while rotating the winding cylinder 50 above the sheet-like belt 8b and by cancelling attraction by the attracting means 15 one after another from attracting means 15 to which the winding cylinder 50 has moved.

Abstract: A manufacturing method includes feeding a master roll 8a from a master roll table 10 to a belt table 14, and cutting the master roll 8a between the master roll table 10 and the belt table 14. In the step of feeding the master roll 8a from the master roll table 10 to the belt table 14, the master roll 8a is fed by holding a front part of the master roll 8a by a first hand 30 and a rear part of the master roll 8a by a second hand 40, and the front part of the master roll 8a is continuously held by the first hand 30 from start to end of the feeding.

Abstract: A single sheet-like belt 8b, from which a single tire component can be formed, is held on an outer circumferential surface of a winding cylinder 12. The sheet-like rubber member 8b, which is held by the winding cylinder 12, is removed from the winding cylinder 12 by rotation of a drum 22 and adhered to an outer circumferential surface of the drum 22, so as to manufacture a tire component 8c. At the time, the sheet-like belt 8b is moved from the winding cylinder 12 to the drum 22 via a removing roller 14 that is arranged above a common tangent Q between the drum 22 and the winding cylinder 12.

Abstract: A manufacturing method includes: cutting out a sheet-like belt 8b by cutting a master roll 8a between a master roll table 10 and a belt table 14; moving the belt table 14 carrying the cut-out sheet-like belt 8b to a winding position of the sheet-like belt 8b; and winding the sheet-like belt 8b around a winding cylinder 50 at the winding position. The master roll 8a is fixed onto the belt table 14 by attraction when the master roll 8a is cut between the master roll table 10 and the belt table 14 and the belt table 14 is moved to the winding position of the sheet-like belt 8b while keeping the cut-out sheet-like belt 8b fixed onto the belt table 14 by attraction.