Toyo Tire Rubber Co., Ltd.

Yu Hatayama

Taizo Yamamoto

Tomoyuki Takatsuka

Makoto Koumo

Osamu Fujiki

Tetsuo Tatara

Masami Tanabe

The invention can surely accomplish lamination without the generation of voids in building a tire constructed to comprise a plurality of rubber members for a tire when a ribbon-shaped rubber strip (R) is spirally wound and laminated, and uses holding rolls () and two sets of stitching rolls (), () arranged in parallel with a center of a rubber strip width (W) therebetween to enable performing of an independent pressing motion, such that the rubber strip (R) is pressed and bonded by the holding rolls () in a position, in which the rubber strip (R) is wound, and the stitching roll () or () positioned fore in an advancing direction of traverse movement, out of the two sets, is caused to perform a pressing motion in a regional part just after the press whereby a fore part of the rubber strip in the advancing direction is pressed and bonded.

Tire building method and rubber strip bonding apparatus

A stitcher apparatus for pressing a carcass ply sheet from its outer periphery as to be pressure-bonded onto a rubber sheet member after that the carcass ply sheet is pasted onto the rubber sheet member wound around a building drum, the stitcher apparatus including: a ring-shaped frame; and a plurality of pressure-bond rollers.

Method of building carcass band and stitcher apparatus

The invention enables to pressure-bond a carcass ply sheet pasted onto a rubber laminating member wound around a periphery of a building drum firmly along a recessed and projected shape of the rubber laminating member without producing a deformation or a warp of a carcass cord, by using a stitcher apparatus constituted by arranging a plurality of pressure-bond rollers having axis centers in a tangential direction of a concentric circle having a diameter larger than that of a building drum in a peripheral direction by a plurality of rows and by a constant pitch by being respectively supported to be able to progressively displace to an inner side in a diameter direction, while moving the building drum in an axial direction relative to the pressure-bond rollers on an inner side of a circular arrangement of the pressure-bond rollers, a carcass ply sheet is pressed by a predetermined pressure to pressure-bond over an entire periphery and simultaneously by the respective pressure-bond rollers progressively displaced to the inner side in the diameter direction.

The present invention can transfer a belt member on a supply conveyor onto a building drum from an inclined distal end portion while holding on both side edge portions in the width direction thereof and can efficiently adhere the belt member according to the rotation of the building drum. As a means for such building, using a supply conveyor () which places the belt member (B) thereon and a hand device () which includes holding members (), () having press plates (), () extending in the feeding direction of the supply conveyor. In a state that a distal end portion of the belt member (B) on the supply conveyor is held on a lower surface of the press plates (), () of the hand device (), the belt member (B) is transferred to the building drum (D) along with a feeding operation of the supply conveyor () and, at the same time, the belt member (B) is adhered by pressing to a peripheral surface of the building drum (D) from a distal end portion thereof while rotating the building drum along with the transfer of the belt member.

Method and apparatus of adhering and building belt member

Adhering a belt edge tape to both respective side edge portions of the belt on the outer peripheral surface of the building drum by supplying a belt edge tape toward the outer peripheral surface of the building drum by pressing using an extruder which constitutes a supply device facing the building drum in an opposed manner and by pressing the tape to the building drum using a press roller on a leading side as viewed from a position where the tape is supplied in the rotational direction of the building drum, the building drum is rotated in the direction that end portions of the reinforcing cords on the side edge portion of the belt which constitutes a tape adhering side are positioned on a trailing side in the rotational direction of the building drum thus adhering the tape to the side edge portion.

Method and apparatus of adhering belt edge tape

According to the present invention, in adhering a belt edge tape () which is interposed between belt layers of a tire, press rollers surely adhere by pressing the belt edge tape () to a building drum (D) while preventing the press rollers from being caught by end portions of inclined cords which constitute a belt. For this end, in adhering the belt edge tape () to both respective side edge portions of the belt on the outer peripheral surface of the building drum by supplying the belt edge tape () toward the outer peripheral surface of the building drum by pressing using an extruder () which constitutes a supply device facing the building drum (D) in an opposed manner and by pressing the belt edge tape () to the building drum (D) using a press roller (), () on a leading side as viewed from a position where the belt edge tape () is supplied in the rotational direction of the building drum (D), the building drum (D) is rotated in the direction that end portions of the reinforcing cords on the side edge portion of the belt which constitutes a tape adhering side are positioned on a trailing side in the rotational direction of the building drum (D) thus adhering the belt edge tape () to the side edge portion.

An apparatus for jointing of cord fabric performed when cord fabric for topping is alternately drawn from two supply positions for continuous supply. When drawing to supply of the cord fabric on one side, a start end portion of the cord fabric on other side is locked to hold by a locking pin of a jointing holder, and is set to a jointing mounting portion in a state where an unvulcanized jointing rubber member is pasted thereto. When a final end of the cord fabric on the one side comes closer, a finish end portion thereof is pasted to the start end portion of the cord fabric held by the holder by interposing the rubber member therebetween. The finish end portion and the start end portion are squeezed for joint from upper and lower sides by press members. Thereafter, the holder is removed, and the cord fabric on the other side is drawn to supply continuously to the cord fabric on the one side.

Apparatus of jointing cord fabric

A method of jointing a cord fabric when the cord fabric for topping is alternately drawn from two supply positions for continuous supply. During drawing to supply of the cord fabric on one side, a start end portion of the cord fabric on other side is locked to hold by a locking pin of a jointing holder, and is set to a jointing mounting portion in a state where an unvulcanized jointing rubber member is pasted thereto. When a final end of the cord fabric on the one side comes closer, a finish end portion thereof is pasted to the start end portion of the cord fabric held by the holder by interposing the rubber member therebetween. The finish end portion and the start end portion are squeezed for joint from upper and lower sides by press members, thereafter, the holder is removed, and the cord fabric on the other side is drawn to supply continuously to the cord fabric on the one side.

Growing community of inventors

Osaka, Japan

Yu Hatayama