JP6981246B2 - Winding device for tire strips - Google Patents

Description

The present invention relates to a winding device for a band-shaped member of a tire.

In the tire manufacturing method, a band-shaped member (hereinafter, also referred to as a tire band-shaped member) forming each part of the tire such as a tread, a sidewall, and a belt is prepared. This strip-shaped member is wound on a reel and stored. This band-shaped member contains unvulcanized rubber, is easily deformed, and is easily adhered.

In JP-A-8-57979, this strip-shaped member is overlapped with a liner and wound on a reel. By overlapping the liners, the adhesion of the overlapping parts in the radial direction is suppressed. Similarly, in Japanese Patent Application Laid-Open No. 2014-73589, a strip as a strip-shaped member is overlapped with a liner and wound on a reel.

Japanese Unexamined Patent Publication No. 8-57979 Japanese Unexamined Patent Publication No. 2014-73589

FIG. 11 illustrates a part of the cross section of the strip 72 and the liner 74 as a strip member in a state of being wound on a reel (not shown). In FIG. 11, the left-right direction is the axial direction of the reel, and the vertical direction is the radial direction of the reel. The band 72 includes a main portion 76 and an edge cover 78 that covers the axial ends of the main portion 76.

The strip 72 and the liner 74 are respectively tensioned and wound on a reel. The band 72 is radially wound together with the liner 74. The winding radius of the band 72 and the liner 74 is increased by being wound. The tension acting on the band 72 and the liner 74 changes due to the change in the winding radius.

When this tension is reduced, the wound band 72 becomes loose. In addition, the wound liner 74 is slackened. FIG. 11 shows a state in which the wound band 72 is deformed due to these slacks. The deformation of the band 72 impairs the shape accuracy of the belt member obtained from the band 72. Further, the shape accuracy of the tire manufactured by combining the belt members is impaired.

On the other hand, when the tension of the band 72 wound on the reel increases, this tension causes the band 72 to be deformed. Further, when the tension of the liner 74 increases, the wound strip 72 is tightened. This tightening causes deformation of the band body 72. Here, the band 72 is shown as an example, but as described above, it is required to suppress the deformation of the band-shaped member of the tire for this winding.

An object of the present invention is to provide a winding device that suppresses deformation of a band-shaped member of a tire.

In the winding device according to the present invention, the strip-shaped member forming the tire member is superposed on the liner and wound. This winding device includes a strip-shaped member feeding device, a liner feeding device, a reel for winding the strip-shaped member and the liner, and a control device.
The reel includes a reel body for winding the strip-shaped member and the liner, and a reel drive unit for rotating the reel body in a winding direction. The liner feeding device includes a braking device that applies a brake torque to the liner feeding device. The control device has a function of controlling the brake torque applied by the brake device and a function of increasing the brake torque of the brake device in response to an increase in the winding radius of the liner.

Preferably, the control device has a function of controlling the brake torque to keep the tension of the liner wound on the reel constant.

Preferably, the braking device is a powder clutch brake.

Preferably, the strip-shaped member feeding device has a function of feeding out the strip-shaped member in accordance with the winding of the reel.

Preferably, the take-up device includes a feed guide between the strip-shaped member feeding device and the reel. The feed guide has a function of shifting the position of the strip-shaped member wound around the reel body in the axial direction of the reel body.

Preferably, the feed guide includes a guide body that abuts on the widthwise side surface of the strip-shaped member, and a guide drive unit that moves the guide body in the axial direction of the reel body.

The method for manufacturing a strip-shaped member according to the present invention includes a strip-shaped member molding step for molding the strip-shaped member of a tire, and a winding step for winding the strip-shaped member around a reel body.
In the above winding process
A brake torque is applied to the liner that is overlapped with the strip-shaped member and wound around the reel body, and the brake torque is increased in response to an increase in the winding radius of the liner.

The strip-shaped member includes a main portion and an edge cover that covers the widthwise end portion of the main portion. In the strip-shaped member forming step, an edge cover is formed at the widthwise end portion of the main portion. Preferably, in the winding step, the strip-shaped member is wound around the reel body while shifting the winding position in the axial direction of the reel body.

In the winding step, the strip-shaped member is wound around the reel body while shifting the winding position to one and the other in the axial direction with respect to the center line Lr of the reel body to the swing width Da. The runout width Da is preferably 10 (mm) or more and 30 (mm) or less.

In the winding step, the strip-shaped member is wound around the reel body while moving from a position centered on the center line Lr of the reel body to a swing width Da in one axial direction, and then wound on the other in the axial direction. The band-shaped member is wound around the reel body while moving to the runout width Da, and then wound around the reel body while moving to a position centered on the center line Lr of the reel body in the width direction. It is one cycle of winding. At this time, the length at which the strip-shaped member is wound in one cycle is preferably 1 (m) or more and 7 (m) or less.

The tire manufacturing method according to the present invention is a low cover in which a band-shaped member manufacturing process, a cutting process in which the strip-shaped member is cut to obtain a rubber member, and a member forming each part of the tire including the rubber member are combined. It is provided with a preforming step of forming the tire and a vulcanization step of vulcanizing the low cover to obtain a tire from the low cover.
In the manufacturing process of the strip-shaped member, a brake torque is applied to a liner that is overlapped with the strip-shaped member and wound around the reel body, and the brake torque is increased in response to an increase in the winding radius of the liner.

In the take-up device according to the present invention, it is suppressed that the tension acting on the liner changes due to the change in the take-up radius of the liner. As a result, deformation of the strip-shaped member wound on the reel is suppressed.

FIG. 1 is a conceptual diagram showing a winding device according to an embodiment of the present invention together with a band-shaped member of a tire. FIG. 2 is an explanatory view showing a side view of the usage state of the take-up device of FIG. 1. 3 (a) is an explanatory view showing the front of the usage state of the winding device of FIG. 1, and FIG. 3 (b) is an explanation showing the front of the other usage state of the winding device of FIG. It is a figure. FIG. 4 is a partially enlarged view of the winding device of FIG. 1 in still another usage state. FIG. 5 is a partially enlarged view of the winding device of FIG. 1 in still another usage state. FIG. 6 is an explanatory view showing a strip-shaped member wound on the reel of the winding device of FIG. 1. FIG. 7 is a graph showing the relationship between the winding radius of the strip-shaped member of the winding device of FIG. 1 and the brake torque of the braking device. FIG. 8 is a conceptual diagram showing a part of the winding device according to another embodiment of the present invention together with a band-shaped member of a tire. FIG. 9 is an explanatory diagram showing a feed guide of the take-up device of FIG. 10 (a) is an explanatory diagram showing a usage state of the feed guide of FIG. 9, and FIG. 10 (b) is an explanatory diagram showing another usage state of the feed guide of FIG. 9. FIG. 11 is an explanatory view showing a strip-shaped member wound on a reel of a conventional winding device.

Hereinafter, the present invention will be described in detail based on a preferred embodiment with reference to the drawings as appropriate.

FIG. 1 shows a winding device 2, a band 4 as a band-shaped member, and a liner 6. Here, the winding of the band 4 will be described as an example.

The band 4 is a band-shaped member that forms a belt of a tire. The belt is placed radially inside the tread of the tire. The belts are laminated on the radial outer side of the carcass. The belt has the function of reinforcing the carcass. The band 4 includes a main portion 8 and a pair of edge covers 10. Although not shown, the main part 8 consists of a large number of parallel cords and unvulcanized topping rubber. The edge cover 10 is made of unvulcanized rubber. In this band 4, the edge cover 10 covers the widthwise end portion 8a of the main portion 8.

The liner 6 is made of, for example, a thin resin sheet. The liner 6 has a band shape.

The winding device 2 of FIG. 1 includes an edge cover forming device 12, a strip-shaped member feeding device 14, a liner feeding device 16, a reel 18, a feeding guide 20, and a control device 22. It is described that the arrow X in FIG. 1 is directed forward in the front-rear direction of the winding device 2, the arrow Y is oriented right in the left-right direction, and the arrow Z is oriented upward in the vertical direction.

The edge cover forming device 12 includes, for example, a pair of rolls 24a, a pair of rolls 24b, and a pair of rolls 24c as crimping rolls. The rolls 24a, 24b and 24c have a function of crimping the edge cover tape 26 to the widthwise end portion 8a of the main portion 8. The edge cover tape 26 is made of unvulcanized rubber. The edge cover tape 26 is crimped to the main portion 8 to form the edge cover 10. The edge cover forming device 12 has a function of forming the edge cover 10 on the end portion 8a of the main portion 8. The edge cover forming device 12 may have a function of forming the edge cover 10 at the end portion 8a of the main portion 8.

The reel 18 includes a reel main body 28 and a reel drive unit 30. The reel main body 28 includes an outer peripheral surface 28a around which the band 4 and the liner 6 are wound. The reel drive unit 30 has a function of rotationally driving the reel body 28 in a direction in which the band 4 and the liner 6 are wound up. The reel drive unit 30 includes a rotary drive machine, for example, a motor.

The liner feeding device 16 includes a core portion 32 around which the liner 6 is wound and a powder clutch brake 34 as a braking device. The shape of the core material 32 is cylindrical. A liner 6 is wound around the outer peripheral surface of the core material 32 in the radial direction. The liner feeding device 16 has a function of feeding the liner 6 to the reel 18 by winding the liner 6 on the reel 18.

Although not shown, the powder clutch brake 34 includes a coil, a fixed member, an output shaft, and a magnetic powder filled between the fixed member and the output shaft. In a state where no current is passed through this coil, the magnetic powder is pressed toward the outer peripheral side between the fixed member and the output shaft by the centrifugal force due to the rotation of the output shaft. As a result, the output shaft can rotate without receiving the brake torque from the fixed member. On the other hand, when a current is passed through this coil, the coil is excited. The magnetic flux generated by the excitation of the coil connects the magnetic powder in a chain between the fixed member and the output shaft. As a result, the output shaft receives the brake torque from the fixed member. The powder clutch brake 34 applies a brake torque to the rotation of the core material 32. The powder clutch brake 34 has a function of increasing or decreasing the brake torque by changing the magnitude of the current value.

The band-shaped member feeding device 14 includes a pair of rollers 36 and a belt 37 spanned by the pair of rollers 36. The band-shaped member feeding device 14 does not include a driving unit and a braking unit. The band-shaped member feeding device 14 is arranged between the edge cover forming device 12 and the reel 18. The band-shaped member feeding device 14 has a function of feeding the band 4 to the reel 18 by winding the band 4 on the reel 18. The band-shaped member feeding device 14 is configured so as to generate almost no feeding resistance. A transformer wheel may be used as the band-shaped member feeding device 14.

The band-shaped member feeding device 14 does not drive the band body 4 for feeding. The band-shaped member feeding device 14 does not brake the feeding of the band body 4. The band-shaped member feeding device 14 sends out the band 4 by winding the reel 18 without applying a driving force or a braking force. In the present invention, the band-shaped member feeding device 14 sends out the band 4 by winding the reel 18 without applying a driving force or a braking force, and the band 4 is driven by the winding of the reel 18. Called to send out. The band-shaped member feeding device 14 has a function of feeding the band 4 to the reel 18 in accordance with the winding of the reel 18.

The feed guide 20 includes a pair of guide plates 38 as a pair of guide main bodies, a connecting portion 40 to which the pair of guide plates 38 are attached, and a guide drive portion 42. One guide plate 38 extends from one end of the connecting portion 40 extending in the left-right direction. The other guide plate 38 extends from the other end of the connecting portion 40. The pair of guide plates 38 are arranged with the band 4 in between. The guide drive unit 42 has a function of moving the pair of guide plates 38 and the connecting unit 40 in the left-right direction. The guide drive unit 42 includes, for example, a ball screw and a motor. The feed guide 20 has a function of shifting the position of the band 4 wound around the reel body 28 in the axial direction of the reel body 28.

The control device 22 has a function of controlling the brake torque of the brake device 34. The control device 22 has a function of controlling the movement of the pair of guide plates 38 of the feed guide 20. The control device 22 has a function of controlling the drive of the reel drive unit 30.

FIG. 2 shows the side surface of the take-up device 2 in use. In this used state, the band 4 and the liner 6 are wound around the reel body 28. In this take-up device 2, the reel drive unit 30 rotates the reel main body 28 in a direction in which the band 4 and the liner 6 are taken up. As a result, the reel body 28 winds up the band 4 and the liner 6.

The band-shaped member feeding device 14 sends out the band 4 by the reel 18 winding the band 4. The band-shaped member feeding device 14 sends out the band 4 by winding the reel 18 without applying a driving force or a braking force. The band-shaped member feeding device 14 is driven by the winding of the reel 18 to feed the band body 4.

The liner feeding device 16 feeds the liner 6 toward the reel 18 by winding the liner 6 on the reel 18. The liner feeding device 16 includes a powder clutch brake 34 (see FIG. 1). The powder clutch brake 34 brakes the rotation of the core portion 32. The liner feeding device 16 applies a brake torque to the feeding of the liner 6. This brake torque applies tension to the liner 6 wound around the reel 8.

FIG. 3A shows the front surface of the take-up device 2 in the used state of FIG. In the feed guide 20 of FIG. 3A, the guide drive unit 42 moves the guide plate 18 to the left side in the left-right direction (right side in FIG. 3A). Due to the movement of the guide plate 18, the position of the band 4 wound around the reel body 28 is shifted to the left in the axial direction of the reel body 28.

FIG. 3B shows the front of the take-up device 2 in another use state. In the feed guide 20 of FIG. 3 (b), the guide drive unit 42 moves the guide plate 18 to the right side in the left-right direction (left side in FIG. 3 (b)). Due to the movement of the guide plate 18, the position of the band 4 wound around the reel body 28 is shifted to the right in the axial direction of the reel body 28.

The alternate long and short dash line Lr in FIGS. 3A and 3B represents a center line that passes through the axial center of the reel body 28 and intersects the axis of the reel body 28 perpendicularly. The alternate long and short dash line Lg represents a center line that is equidistant from the pair of guide plates 38 in the axial direction and extends in parallel with the guide surface 38a of the guide plates 38. The double-headed arrow Da represents the axial runout width of the guide plate 38. This runout width Da is measured as a linear distance between the center line Lr and the center line Lg in the axial direction of the reel main body 28.

The reference numeral Ar in FIG. 4 represents the rotation center of the reel body 28. The reference numeral Cr represents an end point where the liner 6 and the outer peripheral surface of the band 4 are in contact with each other. The double-headed arrow Rr represents the winding radius of the liner 6 wound on the reel 18. This winding radius Rr is measured as a radial distance between the rotation center Ar and the end point Cr.

The reference numeral As in FIG. 5 represents the rotation center of the core portion 32. Reference numeral Cs represents an end point in the liner 6 in which the portion sent out toward the reel 18 and the outer peripheral surface of the wound portion are in contact with each other. The double-headed arrow Rs represents the delivery radius of the liner 6 delivered from the core portion 32. This sending radius Rs is measured as a radial distance between the rotation center As and the end point Cs.

FIG. 6 shows a part of a cross section of the strip 4 and the liner 6 wound on the reel main body 28 of the winding device 2. The cross sections 44a to 44f of the band 4 are stacked from the inside to the outside in the radial direction of the reel main body 28. In the radial direction, a liner 6 is superposed between each of the cross sections 44a and 44f. In FIG. 6, the cross section 44a and the cross section 44b of the strips 4 adjacent to each other in the radial direction are displaced from each other in the axial direction of the reel main body 28. As a result, in the band 4, the portion of the edge cover 10 having the cross section 44a and the portion of the edge cover 10 having the cross section 44b are displaced in the axial direction. Due to the axial deviation of the edge cover 10, the radial distance between the cross section 44a and the cross section 44b of the main portion 8 is relatively small. The distance between the cross section 44b and the cross section 44f is the same as the distance between the cross section 44a and the cross section 44b.

A method for manufacturing a tire using this take-up device 2 will be described. This tire manufacturing method includes a strip-shaped member manufacturing step (STEP1), a cutting step (STEP2), a preforming step (STEP3), and a vulcanization step (STEP4). This strip-shaped member manufacturing step (STEP1) includes a strip-shaped member forming step (STEP11) and a winding step (STEP12).

In the band-shaped member forming step (STEP 11), although not shown, a band-shaped rubber sheet in which a large number of parallel cords are covered with unvulcanized topping rubber is formed. A large number of cords extend in the longitudinal direction in this rubber sheet. The rubber sheet is cut at a predetermined angle inclined in the longitudinal direction at a predetermined interval to form a rubber sheet piece. The rubber sheet pieces are joined together to form the main portion 8. In the main portion 8, the cut end of the rubber sheet piece is set to the width direction end. As a result, in the main portion 8, the cord extends so as to be inclined with respect to the longitudinal direction.

Further, in this band-shaped member forming step, the edge cover tape 26 is coated on the end portion 8a of the main portion 8. As a result, the edge cover 10 is formed at the end portion 8a of the main portion 8, and the band 4 is formed. The band 4 is sent to the winding process. Here, the belt member 4 that forms the edge cover 10 will be described as an example, but the edge cover 10 may not be formed. In that case, the main portion 8 is sent to the winding process as a strip-shaped member.

In the winding step (STEP 12), the reel drive unit 30 rotates the reel main body 28 in the direction of winding the band 4. The reel 18 superimposes the band 4 and the liner 6 and winds them up. The reel drive unit 30 winds the band 4 and the liner 6 with a constant winding torque.

The band-shaped member sending device 14 is driven by the reel 18 to wind up the band 4, and sends out the band 4.

In the feed guide 20, the guide drive unit 42 moves the pair of guide plates 38 and the connecting portion 40 in the left-right direction. The pair of guide plates 38 are moved from the position where the center line Lg coincides with the center line Lr of the reel main body 28 by the swing width Da in one axial direction to be in the state of FIG. 3A. As a result, in the axial direction, the position where the band 4 is wound around the reel body 28 is deviated from the center line Lr by the swing width Da. When the pair of guide plates 38 reach the position shown in FIG. 3A, they are moved toward the other in the axial direction. The pair of guide plates 38 move in the other direction in the axial direction by the swing width Da to be in the state shown in FIG. 3 (b). Further, the pair of guide plates 38 move to a position where the center line Lg coincides with the center line Lr of the reel main body 28. The pair of guide plates 38 repeat the movement with this movement as one cycle.

The band 4 is wound while changing its position in the width direction (axial direction of the reel body 28). As shown in FIG. 6, the band 4 is wound while changing its position in the width direction. The band 4 is wound around the reel body 28 with one cycle of movement of the pair of guide plates 38 as one winding cycle.

In this take-up device 2, the left-right swing width Da is set to, for example, 20 (mm), respectively. In this take-up device 2, for example, the take-up length of the band 4 in one cycle is set to 4 (m). The pair of guide plates 38 repeat one cycle of movement every 4 (m) winding lengths. The axial width of the band 4 is generally 100 (mm) or more and 350 (mm) or less.

In the liner feeding device 16, the reel 18 winds the band 4 to feed the liner 6. The liner feeding device 16 applies a brake torque to the core portion 32 that feeds the liner 6. Due to this braking torque, a braking force acts on the delivery of the liner 6. A predetermined tension acts on the liner 6.

FIG. 7 shows the relationship between the winding radius Rr of the liner 6 and the brake torque T acting on the liner feeding device 16. The horizontal axis of FIG. 7 is the winding radius Rr of the liner 6, and the vertical axis is the brake torque T. The reference numeral Rb represents the winding start radius of the liner 6, and the reference numeral Rf represents the winding completion radius of the liner 6. The reference numeral Tb represents the initial brake torque of the liner feeding device 16, and the reference numeral Tf represents the final braking torque of the liner feeding device 16. This initial braking torque is, for example, 0.05 (Nm) or more and 5 (Nm) or less. The final brake torque is, for example, 1 (Nm) or more and 10 (Nm) or less.

In this take-up device 2, the band 4 and the liner 6 are taken up by the reel body 28, so that the take-up radius Rr of the liner 6 is increased. The take-up radius Rr of the liner 6 increases from the start radius Rb to the completion radius Rf. The brake torque T increases in response to the increase in the take-up radius Rr of the liner 6. This brake torque T increases from the initial brake torque Tb to the final brake torque Tf.

In the winding device 2, the control device 22 stores the start radius Rb, the completion radius Rf, the initial brake torque Tb, and the final brake torque Tf of the liner 6. Further, the control device 22 calculates and stores the torque change rate A based on the start radius Rb, the completion radius Rf, the initial brake torque Tb, and the final brake torque Tf. This torque change rate A is calculated by the following equation (1).
A = (Tf-Tb) / (Rf-Rb) (1)

In this take-up device 2, although not shown, the take-up radius Rr of the liner 6 is measured by an optical sensor. From this take-up radius Rr, the control device 22 increases the brake torque T by the following equation (2).
T = A ・ Rr + Tb (2)
FIG. 7 shows a relationship in which the brake torque T is increased in response to the increase in the take-up radius Rr in this way. The take-up radius Rr and the brake torque T are expressed as linear functions.

Here, the take-up radius Rr is measured by an optical sensor, but the present invention is not limited to this. For example, the number of rotations of the reel body 28 is input to the control device 22 as data from the start radius Rb to the completion radius Rf. The take-up radius Rr is calculated from the number of rotations of the reel body 28, the starting radius Rb, and the amount of increase in the radius per rotation of the reel body 28 (sum of the thickness of the band 4 and the thickness of the liner 6). May be done.

In this way, a wound body in which the band body 4 and the liner 6 are wound is obtained. This winding body is sent to the next process.

In the cutting step (STEP 2), the band 4 is unwound from the reel body 28. The band 4 is cut to a predetermined length to obtain a belt member as a rubber member.

In the preforming step (STEP3), another rubber member forming each part of the tire such as a tread member forming a tread and a sidewall member forming a sidewall is combined with this belt member to form a low cover. ..

In the vulcanization step (STEP4), this low cover is vulcanized and molded in a mold. By this vulcanization molding, a tire is obtained from a low cover.

In the reel 18, the reel drive unit 30 rotates the reel body 28 in a direction of winding with a constant drive torque. The band 4 and the liner 6 are superposed on the reel body 28 and wound up. At this time, the band 4 and the liner 6 receive a force acting in the winding direction and a winding force by this driving torque. This take-up force decreases as the take-up radius increases.

In the liner feeding device 16, the powder clutch brake 34 applies a brake torque T to the feeding of the liner 6. The control device 22 controls the brake torque T of the powder clutch brake 34. The control device 22 increases the brake torque T of the powder clutch brake 34 in response to the increase in the take-up radius Rr of the liner 6. The braking force for winding increases in accordance with the increase in the winding radius Rr of the liner 6. This braking force increases by a magnitude not exceeding the winding force acting on the liner 6 when the braking force acts.

In this take-up device 2, the take-up force received by the liner 6 decreases due to the increase in the take-up radius Rr. The braking force of the liner 6 increases in response to the increase in the winding radius Rr. This increase in braking force suppresses a decrease in tension acting on the liner 6. In this winding device 2, the change in the tension of the liner 6 is suppressed.

If the tension of the liner 6 is too strong, the band 4 is strongly tightened. This strong tightening force deforms the band 4. The cross-sectional shape of the band 4 is impaired. On the other hand, if the tension of the liner 6 is too weak, the liner 6 will be loosened. This slack causes the band 4 to collapse and the surface of the band 4 to be deformed such as wrinkles.

In this winding device 2, the change in the tension of the liner 6 is suppressed. It is suppressed that the tension of the liner 6 is too strong or too weak. In this winding device 2, an appropriate tension is applied to the liner 6 and the liner 6 can be wound together with the band 4. In this winding device 2, the deformation of the band 4 due to the change in the tension of the liner 6 is suppressed.

In this take-up device 2, the take-up force received by the liner 6 decreases as the take-up radius Rr increases. The control device 22 increases the braking force by keeping the ratio of the increase amount of the braking force to the increase amount of the winding radius Rr constant. As a result, the control device 22 can make the tension of the liner 6 substantially constant. Maintaining the tension of the liner 6 at a constant level contributes to suppressing the deformation of the band 4.

The thickness of the liner 6 is extremely small compared to the thickness of the band 4. Therefore, the rate of change in the sending radius Rs is extremely small compared to the rate of change in the winding radius Rr of the liner 6. Therefore, in the control device 22, the brake torque T is calculated by omitting the change in the braking force of the liner 6 due to the decrease in the delivery radius Rs. The braking device 22 may calculate the brake torque T in consideration of the change in the braking force of the liner 6 due to the decrease in the delivery radius Rs.

The take-up device 2 includes a powder clutch brake 34 as a brake device. The powder clutch brake 34 can increase or decrease the brake torque by increasing or decreasing the magnitude of the current flowing through the coil. Brake torque can be controlled by controlling the magnitude of the current. By using this powder clutch brake 34, the tension of the liner 6 can be easily controlled.

In this take-up device 2, the band-shaped member sending device 14 is driven by the winding of the reel 18 to send out the band body 4. A resistance force due to its own weight is generated in the band 4 by moving in the direction in which the band 4 is wound. When the band-shaped member feeding device 14 is driven to feed the band-shaped member 4, the band-shaped member feeding device 14 causes the band-shaped member 4 to hardly generate this feeding resistance. As a result, a large tension is not generated in the band body 4. In this way, the band 4 is wound around the reel body 28 without receiving a large tension. Deformation due to tension is suppressed in the band 4. From the viewpoint of reducing the resistance force due to feeding, even if a transformer wheel in which a plurality of small rollers that can be further rotated are arranged in the circumferential direction on the outer periphery of the rotatable roller body is used for the strip-shaped member feeding device 14. good.

Further, the band 4 is superposed on the liner 6 having a constant tension. As a result, the cross-sectional shape of the band 4 is made constant in the longitudinal direction thereof. The winding device 2 contributes to suppressing the deformation of the band 4. This band 4 contributes to the improvement of the shape accuracy of the tire.

The take-up device 2 includes a feed guide 20. By this feed guide 20,
The position of the band 4 is shifted in the axial direction of the reel 18. As shown in FIG. 6, the overlap of the edge covers 10 of the band 4 in the radial direction is reduced. In the center in the width direction, the gap created by the overlapping of the strips 4 is smaller than that in the state of FIG. The occurrence of slack in the band 4 at the center in the width direction is suppressed. Suppression of the occurrence of this slack suppresses the deformation of the band 4. In addition to adjusting the tension of the liner 6, the take-up device 2 can further suppress the deformation of the band 4 by winding the belt member 4 at a position shifted in the axial direction of the reel body 18.

In this winding device 2, as shown in FIG. 6, the band 4 is wound by shifting the position of the band 4 in the axial direction of the reel body 28, but the winding device 2 is not limited to this. As shown in FIG. 11, in the axial direction of the reel main body 28, the band 4 may be wound around the reel main body 28 without shifting. In this winding device 2, the variation between the tension of the liner 6 wound around the reel body 28 and the tension of the band 4 is suppressed. By suppressing this variation in tension, partial deformation of the liner 6 and the band 4 is suppressed in the longitudinal direction. In this winding device 2, even if the band 4 is wound around the reel body 28 without shifting in the axial direction, the deformation of the band 4 is reduced.

In the winding device 2, the feed guide 20 includes a pair of guide plates 38 that abut on the widthwise side surfaces of the band 4, and a guide drive unit 30 that moves these guide plates 38 in the axial direction. As a result, the position of the band 4 can be adjusted more reliably and with high accuracy. The feed guide 20 has a simple structure and can adjust the position of the band 4.

Here, the explanation has been given by taking the band 4 as an example, but the band-shaped member is not limited to the band 4. Examples of the band-shaped member include a tread band body used as a tread member, a sidewall band body used as a sidewall member, a clinch band body used as a clinch member, a carcass band body used as a carcass member, and an inner liner member. The inner liner band and the like to be used can be mentioned.

FIG. 8 shows a part of the other winding device 52 according to the present invention together with the band 4. The arrow X in FIG. 8 is the front-rear direction forward direction of the winding device 52, the arrow Y is the left-right direction right direction, and the arrow Z is the up-down direction upward direction. The arrow F indicates the direction in which the band 4 is sent. The configuration of the take-up device 52 different from that of the take-up device 2 will be described. The description of the winding device 52 having the same configuration as that of the winding device 2 will be omitted. Further, the same configuration as that of the take-up device 2 will be described using the same reference numerals.

The take-up device 52 has the same configuration as the take-up device 2 except that the feed guide 54 is provided instead of the feed guide 20. The winding device 52 includes an edge cover forming device 12, a strip-shaped member feeding device 14, a liner feeding device 16, a reel 18, and a control device 22.

The feed guide 54 includes three feed rollers 56, a pair of guide roller assemblies 58, a roller 60, and a guide drive unit 42 (not shown). Three feed rollers 56 are arranged at intervals in the feed direction of the band 4. Due to this spacing, the guide roller assemblies 58 are arranged in the spaces formed between the feed rollers 56, respectively.

As shown in FIG. 9, each feed roller 56 includes a shaft 62 and a plurality of roller bodies 64. The shaft 62 extends in the left-right direction. Each roller body 64 has a disk-shaped shape. The outer peripheral surface 64a of the roller main body 64 is formed by a curved surface protruding outward in the radial direction. The one-sided arrow Rp in FIG. 9 represents the radius of curvature of the outer peripheral surface 64a. The plurality of roller bodies 64 are arranged at predetermined intervals along the axis of the shaft 62. Each roller body 64 is rotatably supported by a shaft 62 as a rotation shaft.

Each guide roller assembly 58 includes a pair of guide rollers 66 as a pair of guide bodies and a connecting portion 68. One guide roller 66 is attached to one end of the connecting portion 68 extending in the left-right direction. The other guide roller 66 is attached to the other end of the connecting portion 68. Each guide roller 66 is rotatably attached with a rotation axis perpendicular to the feed direction and the left-right direction of the band 4. Although not shown, the pair of guide roller assemblies 58 can be moved in the left-right direction by the guide drive unit 42.

In FIG. 10A, the pair of guide rollers 66 are moved to the left side in the left-right direction (right side in FIG. 10A) by the guide drive unit 42. The pair of guide rollers 66 are arranged with the band 4 in between. The pair of guide rollers 66 move to the left side with a swing width Da with respect to the center line Lr of the reel main body 28. As a result, the band 4 moves to the left side with a swing width Da with respect to the center line Lr of the reel body 28. The alternate long and short dash line Lg in FIG. 10A represents a center line that is equidistant from the pair of guide rollers 66 in the axial direction and extends parallel to the axes of the guide rollers 66.

In FIG. 10B, the pair of guide rollers 66 are moved to the right side in the left-right direction (left side in FIG. 10B) by the guide driving unit 42. The pair of guide rollers 66 move to the right side with a swing width Da. As a result, the band 4 moves to the right side with a swing width Da in the axial direction with respect to the center line Lr of the reel main body 28.

In the feed guide 54, the guide drive unit 42 moves the pair of guide roller assemblies 58 in the left-right direction. The pair of guide rollers 66 move in one axial direction by the swing width Da to be in the state shown in FIG. 10 (a). As a result, in the axial direction, the position where the band 4 is wound around the reel body 28 is deviated from the center line Lr by the swing width Da. When the pair of guide rollers 66 reach the position shown in FIG. 10A, they are moved toward the other in the axial direction. The pair of guide rollers 66 move in the other direction in the axial direction by the swing width Da to be in the state shown in FIG. 10 (b). Further, the pair of guide rollers 66 move to a position where the center line Lg coincides with the center line Lr of the reel body 28. The pair of guide rollers 66 repeat the movement with this movement as one cycle.

The band 4 is wound while changing its position in the width direction (axial direction of the reel body 28). The band 4 is wound around the reel body 28 while changing its position in the axial direction. In this take-up device 52, the left-right swing width Da is set to, for example, 20 (mm), respectively. The pair of guide rollers 66 has, for example, a winding length of the band 4 in one cycle of 4 (m). The pair of guide rollers 66 repeat one cycle of movement every 4 (m) winding lengths.

By increasing the swing width Da, it is possible to reduce the radial overlap of the edge covers 10 in the band 4. From this point of view, the runout width Da is preferably 10 (mm) or more, and more preferably 15 (mm) or more. On the other hand, if the runout width Da is too large, unwinding may occur or the belt member 4 may be wrinkled. From this point of view, the runout width Da is preferably 30 (mm) or less, and more preferably 25 (mm) or less.

By reducing the winding length of the band 4 in one cycle, the radial overlap of the edge covers 10 of the band 4 can be reduced. From this viewpoint, the winding length in one cycle is preferably 7 (m) or less, more preferably 6 (m) or less, and particularly preferably 5 (m) or less. On the other hand, if the winding length of the band 4 in one cycle is too small, the winding collapse occurs or the belt member 4 is wrinkled. From this viewpoint, the winding length in one cycle is preferably 1 (m) or more, more preferably 2 (m) or more, and particularly preferably 3 (m) or more.

In the feed guide 54, the guide roller 66 comes into contact with the band 4. The guide roller 66 is rotatably attached with a rotation axis perpendicular to the feed direction of the band 4. The guide roller 66 is suppressed from hindering the movement of the band 4.

In the feed guide 54, the band 4 is fed by the feed roller 56. In the feed roller 56, a plurality of roller main bodies 64 are arranged in the axial direction. The feed roller 56 has a small contact area with the band 4. The roller body 64 is movable in the axial direction. This facilitates the movement of the band 4 in the left-right direction. Since the outer peripheral surface 64a of the roller main body 64 is formed of a curved surface, the band 4 can be further easily moved in the left-right direction. A transformer wheel may be used as the feed roller 56. The transformer wheel may facilitate movement in the left-right direction with almost no feed resistance generated in the band 4.

In this feed guide 54, the number of feed rollers 56 is three, but one or more may be any number. Further, although the number of the guide roller assemblies 58 is two, the number may be one or more.

Hereinafter, the effects of the present invention will be clarified by Examples, but the present invention should not be construed in a limited manner based on the description of these Examples.

[Example 1]
A take-up device configured in the same manner as the take-up device shown in FIG. 1 was prepared, except that the feed guide shown in FIG. 8 was provided in place of the feed guide shown in FIG. With this winding device, the band shown in FIG. 1 was wound. The length of this band was 1000 (m) and the width was 0.2 (m). As shown in Table 1, the swing width Da was 20 (mm) on each of the left and right sides, and the winding length of one cycle was 4 (m).

[Comparative Example 1]
A conventional take-up device was prepared. With this winding device, the band was wound in the same manner as in Example 1. This take-up device does not have a feed guide. The brake torque of the liner was not adjusted with this take-up device.

[Example 2-3]
The band was wound in the same manner as in Example 1 except that the left and right runout widths Da were set as shown in Table 1.

[Example 4-5]
The band was wound in the same manner as in Example 1 except that the winding length of one cycle was set as shown in Table 1.

[evaluation]
The band wound around the reel body was inspected for unwinding and wrinkles. In this evaluation, the evaluation result of Comparative Example 1 is represented as a reference value 3, and the other evaluation results are represented as an index. This index is evaluated on a 5-point scale, and the larger the value, the better.

As shown in Table 1, the production method of the example has a higher evaluation than the production method of the comparative example. From this evaluation result, the superiority of the present invention is clear.

The method described above can be widely applied to the production of a band containing rubber forming each part of a tire.

2, 52 ... Winding device 4 ... Band 6 ... Liner 8 ... Main part 10 ... Edge cover 12 ... Edge cover forming device 14 ... Band-shaped member sending device 16.・ ・ Liner feeding device 18 ・ ・ ・ Reel 20, 54 ・ ・ ・ Feeding guide 22 ・ ・ ・ Control device 24 ・ ・ ・ Crimping roll 26 ・ ・ ・ Edge cover tape 28 ・ ・ ・ Reel body 30 ・ ・ ・ Reel drive unit 32 ... Core part 34 ... Powder clutch brake 36 ... Roller 38 ... Guide plate 40, 68 ... Connecting part 42 ... Guide drive part 56 ... Feed roller 58 ... Guide Roller assembly 64 ・ ・ ・ Roller body 66 ・ ・ ・ Guide roller

Claims (11)

It is a winding device that winds up a strip-shaped member that forms a tire member by superimposing it on a liner.
It is provided with a strip-shaped member feeding device, a liner feeding device, a reel for winding the strip-shaped member and the liner, and a control device.
The reel includes a reel body for winding the strip-shaped member and the liner, and a reel drive unit for rotating the reel body in a winding direction.
The liner feeding device is provided with a braking device that applies a brake torque to the liner feeding device.
A take-up device having a function of controlling the brake torque applied by the brake device and a function of increasing the brake torque of the brake device in response to an increase in the take-up radius of the liner. The winding device according to claim 1, wherein the control device has a function of controlling the brake torque to maintain a constant tension of the liner wound on the reel. The take-up device according to claim 1 or 2, wherein the brake device is a powder clutch brake. The winding device according to any one of claims 1 to 3, wherein the band-shaped member sending device has a function of following the winding of the reel to send out the band-shaped member. A feed guide is provided between the strip-shaped member feeding device and the reel.
The winding device according to any one of claims 1 to 4, wherein the feed guide has a function of shifting the position of the strip-shaped member wound around the reel body in the axial direction of the reel body. The winding device according to claim 5, further comprising a guide main body in which the feed guide abuts on the widthwise side surface of the strip-shaped member, and a guide drive unit for moving the guide main body in the axial direction of the reel main body. The band-shaped member molding process for molding the band-shaped member of the tire,
It is equipped with a winding process for winding the strip-shaped member around the reel body.
In the above winding process
A method for manufacturing a strip-shaped member that applies a brake torque to a liner that is overlapped with the strip-shaped member and is wound around the reel body, and increases the brake torque in response to an increase in the winding radius of the liner. The strip-shaped member comprises a main portion and an edge cover covering the widthwise end portion of the main portion.
In the strip-shaped member forming step, an edge cover is formed at the widthwise end portion of the main portion.
The method for manufacturing a strip-shaped member according to claim 7, wherein in the winding step, the strip-shaped member is wound around the reel body while shifting the winding position in the axial direction of the reel body. In the above winding process
The strip-shaped member is wound around the reel body while shifting the winding position to the swing width Da on one side and the other side in the axial direction with respect to the center line Lr of the reel body.
The method for manufacturing a strip-shaped member according to claim 8, wherein the runout width Da is 10 (mm) or more and 30 (mm) or less. In the winding step, the strip-shaped member is wound around the reel body while moving from a position centered on the center line Lr of the reel body to a swing width Da in one axial direction, and then swings in the other in the axial direction. The band-shaped member is wound around the reel body while moving to the width Da, and then wound around the reel body while moving to a position centered on the center line Lr of the reel body in the width direction. The method for manufacturing a strip-shaped member according to claim 8 or 9, wherein the length of the strip-shaped member wound in one cycle is 1 (m) or more and 7 (m) or less when one cycle of winding is used. The manufacturing process of strip-shaped members and
The cutting process in which the strip-shaped member is cut to obtain a rubber member,
A pre-molding process in which members forming each part of a tire including the rubber member are combined to form a low cover, and
It is equipped with a vulcanization process in which the low cover is vulcanized and molded to obtain a tire from the low cover.
In the manufacturing process of the strip-shaped member,
A method for manufacturing a tire, in which a brake torque is applied to a liner that is overlapped with the strip-shaped member and wound around a reel body, and the brake torque is increased in response to an increase in the winding radius of the liner.

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