Abstract: A bead wire winding device is provided with a winding guide(s) (3) which is rotated with a molding support body (1), and which approachingly and retreatingly displaces with respect to each side portion of the molding support body (1). A bead wire (W) is supplied to a wire seating portion (11) of the winding guide (3) within a space defined by each winding guide (3) which is in an approached state with respect to a respective side surface of the molding support body (1), and in an enlarged diameter state. The winding guide (3) is constituted by a plurality of radially displacing members (9), which can be enlargingly and reducingly displaced in a radial direction, connected to a boss portion (7) through link members (8). Each of the radially displacing members (9) has a protrusion that forms a wire seating portion (11). A clamping claw (13) is provided on at least one of the radially displacing members (9), and is urged constantly in a closing direction and pinches a tip portion of the bead wire (W).

Abstract: A pneumatic tire comprises a bead portion, a carcass wound around a bead core having a polygonal form from an inside of a tire toward an outside thereof in a radial direction and a bead filler arranged on an outer periphery of the bead core, wherein a reinforcing layer comprised of an organic fiber cord(s) or a metal wire(s) extended substantially in a circumferential direction of the tire is arranged in a position adjacent to the bead filler.

Abstract: A radial force variation of a tire is corrected irrespectively of the kind of the organic fiber cord used, wherein a radial force variation (RFV) is measured at room temperature to specify a tire position indicating a minimum value of RFV, and an inner face of a tread portion is pushed and enlarged outward in a radial direction of the tire by a pushing means at a RFV bottom region sandwiching the position of the minimum RFV value from both sides thereof in a circumferential direction of the tread portion, and such a push enlarged state is kept for a given time.

Abstract: Method and apparatus for producing tires, in which a carcass layer is formed by continuously feeding a carcass cord from a cord passage and applying the carcass cord over an outer peripheral surface of a substantially toroidal core so as to extend in a meridian direction of the core while the core is subjected to an indexing movement in its circumferential direction. The carcass cord is arranged so as to extend linearly from one end to the other end of the core with respect to a meridian direction thereof, and vice versa, under the operation of a feed mechanism which is capable of achieving a reciprocating movement. A turn-up portion of the carcass cord is wound on, and supported by a pin at the end of the core in the meridian direction, and subsequently adhered onto the core by a press head which can be advanced relative to the pin.

Abstract: A segmented core (10) for manufacturing pneumatic tires includes a substantially toroidal core body (11) formed of a plurality of core segments (12) which are arranged in a circumferential direction in tight contact with each other. A sleeve (31) rotatably supporting a first connector member (33) at its one end is inserted into the core body (11) so that the first connector member (33) is engaged with the core body (11) on one side thereof. A second connector member (40) is then detachably connected to the sleeve (31) on its another end, and thereby brought into engagement with the core body (11) on another side thereof. An integral unit is formed by the sleeve (31), the first connector member (33) and the second connector member (40), which ensures that the core segments (12) are maintained firmly and reliably connected to each other during formation and vulcanization of a green tire supported on the core body (11).

Abstract: A pneumatic tire comprises a carcass made from at least one cord array comprised of many arch portions of a cord extending between a pair of bead portions in a meridional direction and arranged over a full circumference of the tire at an equal interval P in a circumferential direction of the tire and many circumferential portions of the cord alternately arranged in the bead portions, each connecting ends of adjacent arch portions to each other in the bead portion and extending substantially in the circumferential direction. In this case, the cord array is arranged at n layers (n is an integer of 2 or more) while offsetting these layers by a distance L obtained by dividing the interval P by n in the circumferential direction. Further, the bead wire reinforcing layer is arranged outward from the overlap region of the circumferential portions in the radial direction so as to sandwich the cord array from both sides thereof.

Abstract: By turning toward the radially outer direction a turned-up region of a tire component by reciprocating turning fingers, and by positioning the reciprocation centre (the base of a short finger part) of the turning finger at the immediate vicinity of the departing point of the tire component from a bead-locking device, the compressing force provided at the turned-up region in the vicinity of the bead is effectively decreased, and therefore the generation of creasing is controlled.

Abstract: A driving apparatus of a tire forming drum in which rotation of left-hand and right-hand bead locking mechanisms and movement of these bead locking mechanisms in directions of approaching and separating from each other can be effected simultaneously. A state of a main shaft and an inner shaft of the driving apparatus of the tire forming drum can be switched between a connected state and a non-connected state by a clutch. The main shaft and the inner shaft are both connected to a differential gear unit. An encoder is fixed to the differential gear unit and can detect the rotational difference between the inner shaft and the main shaft. Connected to the inner shaft are a distance-between-beads changing motor and a distance-between-beads fixing brake. Mounted to the main shaft are a main shaft rotating motor and a disc brake.

Abstract: A tire building machine includes a single-stage type forming drum (13) for initially forming a carcass band (29) and subsequently forming a green tire (34), and a belt-tread drum (14) for forming a belt-tread band (31). These drums (13, 14) are carried by a horizontal coaxial shaft (12) on a base member (10) of the machine. An integrated transfer unit (16) is movable in a predetermined transfer direction on the base member (10). The transfer unit (16) includes a bead setter (17) for setting beads (23) onto an outer circumference of a carcass band (29) formed on the forming drum (13), and a transfer ring (18) for transferring a belt-tread band (31) formed on the belt-tread drum (14) and a green tire (34) formed on the forming drum (13). The bead setter (17) and the transfer ring (18) are connected to each other as an integrated unit, and driven by a single drive means in the transfer direction.

Abstract: A tire forming system includes a belt drum (1), a band drum (2) and a shaping drum (3), which are linearly arranged in order on a base (9) from its one end to the other. A first drive unit (5) is arranged at one end of the base (9) and coaxially supports and drives the belt drum (1) and the band drum (2). A second drive unit (8) is arranged at the other end of the base (9) and supports and drives the shaping drum (3). A transfer unit (10) is provided and transfer a belt-tread band (25) from the belt drum (1) and a carcass band (26) from the band drum (2) to the shaping drum (3) where they are assembled with each other to form a green tire (35).

Abstract: A tire building drum has a pair of drum sections axially movable along a center shaft which form an internal tire inflation chamber for inflating the carcass of a green tire when mounted between the drum sections. Each of the drum sections has a plurality of bead lock segments controlled by a plurality of straight links moved by an annular piston. The piston is mounted in an annular cylinder surrounded by an annular manifold ring, an annular sealing ring and an annular bladder ring. The annular manifold provides for the distribution of pressurized air to various components of the drum and functions as an air seal for the tire inflation chamber. A plurality of air passages are formed in the manifold ring and connect to a source of pressurized air for supplying the control air from a remote source to an inflation turn-up bladder mounted on each of the drum sections and to a control assembly mounted within each of the drum sections for actuating the bead lock segments.

Abstract: A belt join method, which is used in forming pneumatic radial tires, for joining belt components one upon the other and an apparatus therefor, in which the belt components are centered in such a manner that the center axes thereof are substantially coincident or vertically aligned with one another, by passing through a plurality of longitudinally aligned belt adjusting rollers which are urged by means of a spring.

Abstract: A belt join method, which is used in forming pneumatic radial tires, for joining belt components one upon the other and an apparatus therefor, in which the belt components are centered in such a manner that the center axes thereof are substantially coincident or vertically aligned with one another, by passing through a plurality of longitudinally aligned belt adjusting rollers which are urged by means of a spring.

Abstract: Apparatus for transferring a looped article to a cylindrical structure, comprising a collapsible ring structure having a center axis aligned with the center axis of the cylindrical structure and a centering plane parallel with the central plane of the cylindrical structure, the ring structure being radially deformable about the center axis thereof, a carrier supporting the ring structure and operative to move the ring structure toward and away from the cylindrical structure, and plural pairs of centering elements provided radially inside the ring structure. Each pair of centering elements are located on both sides of the centering plane of the ring structure and consist of centering elements located on both sides of the centering plane of the ring structure and movable toward and away from the centering plane of the ring structure.

Abstract: A rolled sheet paying out transfer apparatus comprises a support frame for supporting a rolled sheet having a liner interposed between turns of the rolled sheets so as to paying out the sheet by winding up the liner, an intermediate conveyor for holding the paid sheet separately from the liner with the aid of an attractive force and introducing the sheet toward a delivery conveyor, and a pushing-down roller for pushing down the sheet at a termination of the intermediate conveyor so as to transfer the sheet onto the delivery conveyor.The apparatus according to the invention automatically holding the sheet immediately below a starting end of the intermediate conveyor, introducing the sheet toward the delivery conveyor, and transferring the front end of the sheet onto the delivery conveyor, without requiring any trouble-some manual operation as required in the prior art.

Abstract: For cutting an elongate rubbery strip, there is disclosed an apparatus which largely comprises transmitting means operative to transmit the elongate rubbery strip to a predetermined position, an anvil located underneath the predetermined position and formed with an elongated groove extending at angle with respect to the transverse direction of the rubbery strip, the angle between the longitudinal direction of the elongated groove and the transverse direction of the rubbery strip being variable by means of adjusting means. The apparatus for cutting the elongate rubbery strip further comprises a cutting mechanism operative to cut the elongate rubbery strip on bias throughout the width thereof in cooperation with the anvil.