Toyo Tire Rubber Co., Ltd.

Tomoyuki Takatsuka

Hirokatsu Mizukusa

Osamu Fujiki

Tetsuo Tatara

Taizo Yamamoto

Yu Hatayama

Makoto Koumo

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 a built band (B) in a cylindrical shape to be easily and surely detached by peeling off the band (B) from being brought into close contact with a drum peripheral face in an expandable and contractable band building drum (D) constituted by two kinds of pluralities of segments () () arranged alternately in a peripheral direction, a diameter of one segment () of two kinds of segments () () is contracted, thereafter, the segment () is temporarily returned to a diameter expanding state, a diameter of other segment () is contracted, thereby, the band (B) is peeled off from being brought into close contact with the drum outer peripheral face, thereafter, the band (B) is detached by bringing both of the segments () () into a diameter contracting state.

Band detaching method in band building drum and band building drum

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 invention enables a built band (B) in a cylindrical shape to be easily and surely detached by peeling off the band (B) from being brought into close contact with a drum peripheral face in an expandable and contractable band building drum (D) constituted by two kinds of pluralities of segments ()() arranged alternately in a peripheral direction, a diameter of one segment () of two kinds of segments ()() is contracted, thereafter, the segment () is temporarily returned to a diameter expanding state, a diameter of other segment () is contracted, thereby, the band (B) is peeled off from being brought into close contact with the drum outer peripheral face, thereafter, the band (B) is detached by bringing both of the segments ()() into a diameter contracting state.

The invention is for enabling one piece of rotation driving meansto drive to rotate both of an outer side shaft portionof a drum shaftand a screw shafton an inner side as a driving apparatusof a tire building drum D, including an outer shaftconnected to the outer side shaft portion, a middle shaftconnected to the screw shaft, one piece of the rotation driving meansconnected to the middle shaftby way of a rotation transmitting member, and a clutchinterposed between the rotation transmitting memberconnected to the middle shaftand the outer shaft, and constituted to transmit rotation of the rotation driving meansto both of the middle shaftand the outer shaftin connecting the clutchand transmit the rotation of the rotation driving meansonly to the middle shaftin cutting the clutch

Driving apparatus of building drum for tire

A tire building method and a tire building facility according to the invention attains reduction of an installation space of the tire building facility and substantially equal building cycles for respective building stages to increase building efficiency and facilitate arrangement switching. For attaining these, a step for building a cylindrical carcass band, a subsequent step for building a cylindrical green case, a step for building a cylindrical belt and tread band, a step for combining the green case and the belt and tread band to build the final shape are divided as first through fourth building stages (S) through (S) having individual building drums (D) through (D) corresponding to the respective steps. Formations in the respective building stages (S) through (S) are simultaneously performed by shifting the carcass band built in the first building stage (S) to the second building stage (S), the green case built in the second building stage (S) to the fourth building stage (S), and the belt and tread band built in the third building stage (S) to the fourth building stage (S).

Tire building method and building facility

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

The invention can firmly and easily remove a finely divided weft piece without leaving the weft piece by constituting a method and an apparatus of removing weft from a cord fabric for a topping sheet in a calender line for topping rubber on a number of pieces of aligned cords by a calender roll. In the midst of transferring a cord fabric transferred to a calender apparatus, weft is finely divided by passing the cord fabric through weft dividing means, thereafter, a plurality of blades arranged movably in a width direction on an upper face side of the cord fabric are reciprocally moved in the width direction over an entire width thereof to be brought into contact with the cord fabric, and the divided weft piece is wiped off to remove by respectively striking respective cords of the cord fabric by the respective blades.

Method and apparatus of removing weft of cord fabric for topping sheet

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.

The invention can perform building in a process for building a carcass band or a belt/tread band of a tire, in which two drum transfer support bases () supporting building drums (D) are alternately shifted to first and second transfer sections (), (), in which predetermined building positions are set, and a rotational transfer device (A) for rotational transfer of the drum transfer support bases () is mounted between the first transfer section () and the second transfer section ().

Tire building method and rotational transfer device for drum transfer support base in tire building process

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

The invention can perform building in a process for building a carcass band or a belt/tread band of a tire, in which two drum transfer support bases () supporting building drums (D) are alternately shifted to first and second transfer sections (), (), in which predetermined building positions are set, a rotational transfer device (A) for rotational transfer of the drum transfer support bases () is mounted between the first transfer section () and the second transfer section (), which are arranged to get out of position relative to and in parallel to each other, and two pairs of rotational transfer rails (), () are juxtaposed on a rotating table (), which has an axis (O) intermediate between the both transfer sections, to be positioned corresponding to extensions of travel rails (), () arranged on the first and second transfer sections (), () to receive two drum transfer support bases (), (), which enter from portions of the rails (), () of the both transfer sections (), (), to have the same rotationally transferring to the other transfer section () or () at the same time.

There is provided a belt member producing method including forming a strip pieceof a predetermined width W by cutting a strip materialincluding a plurality of reinforcement cordsto a regular size, conveying the strip pieceto a transfer conveyorin such a manner that cut sidesof the strip pieceare in parallel with a traveling direction B of the transfer conveyorand overlapping continuously an integral number Nof strip pieceson each other on the transfer conveyorin such a manner that the strip piecesare overlapped on each other by an overlapping amount P along non-cut sidesthereof, so as to produce a belt memberhaving a desired length equal to a predetermined length L of a belt layer of a pneumatic radial tire, the belt member producing method being characterized by including selecting a desired cutting angle &#x3b8;relative to a traveling direction A of the strip materialwhen the strip materialis cut to the regular size, calculating a number Nof strip piecesnecessary for forming a belt memberby the following equation (1), rounding up the number Nso calculated to the integral number Nand calculating an overlapping amount P of the strip piecesby the following equation (2), so as to determine the integral number Nand the overlapping amount P.=()&#xd7;sin &#x3b8;&#x2003;&#x2003;(1)&#xd7;sin &#x3b8;&#x2003;&#x2003;(2)

Belt member producing method

The invention provides a driving apparatus for a tire building drum which can reduce load when the drum is rotating, which enables stable expanding and contracting operations and in which a center shaft portion () of the building drum (D) is made up of a cylindrical outer shaft () and an inner threaded shaft (), the driving apparatus including a cylindrical outer shaft () which is coupled to the outer shaft (), an inner shaft () coupled to the threaded shaft (), a first motor () which is a rotational driving means coupled to the outer shaft () for rotating the drum, and a second motor () which is a rotational driving means coupled to the inner shaft () via a clutch () in such a manner as to be engaged with and disengaged from the inner shaft for expanding or contracting the drum, wherein by switching the clutch (), when the drum is rotating, the second motor () is held out of engagement with the inner shaft (), while when the drum is expanded or contracted, the second motor () is held in engagement with the inner shaft ().

Growing community of inventors

Osaka, Japan

Tomoyuki Takatsuka