JP2019116059A - Winding device for strip member of tire - Google Patents

Abstract

To provide a winding device that suppresses deformation of a strip member of a tire.SOLUTION: A winding device 2 winds a strip member 4 by overlapping it with a liner 6. The winding device 2 includes a strip member delivery device 14, a liner delivery device 16, a reel 18 for winding the strip member 4 and the liner 6, and a control device 22. The reel 18 includes a reel body 28 for winding the strip member 4 and the liner 6, and a reel drive unit 30 for rotating the reel body 28 in a winding direction. The liner delivery device 16 includes a brake device 34 that applies a brake torque to delivery of the liner 6. The control device 22 has a function of controlling the brake torque applied by the brake device 34 and a function of increasing the brake torque of the brake device 34 according to the increase of a winding radius of the strip member 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a winding device for a belt-like member of a tire.

  In the method of manufacturing a tire, a belt-like member (hereinafter, also referred to as a belt-like member of a tire) which forms each part of the tire such as a tread, a sidewall, and a belt is prepared. The strip is wound around a reel and stored. The belt-like member contains unvulcanized rubber, is easily deformed, and easily adheres.

  In JP-A-8-57979, the belt-like member is overlapped with a liner and wound around a reel. By overlapping the liners, adhesion of the radially overlapping portions is suppressed. Similarly, in JP-A-2014-73589, a strip as a belt-like member is superimposed on a liner and wound on a reel.

JP-A-8-57979 JP, 2014-73589, A

  FIG. 11 illustrates a part of a cross section of the band 72 as a band member and the liner 74 in a state of being wound on a reel (not shown). In FIG. 11, the horizontal 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 covering the axial end of the main portion 76.

  The band 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 up. Due to the change of the winding radius, the tension acting on the band 72 and the liner 74 changes.

  As this tension decreases, slack is created in the wound up band 72. In addition, slack is generated in the taken-up liner 74. FIG. 11 shows a state in which the rolled-up 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. Furthermore, the shape accuracy of the tire manufactured by combining this belt member 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 deform. Also, as the tension in the liner 74 increases, the wound band 72 is tightened. This tightening causes the band 72 to deform. Here, although the band 72 is shown as an example, it is required to suppress the deformation of the belt-like member of the tire as described above.

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

In the winding device according to the present invention, a band-shaped member forming a tire member is overlapped with a liner and wound. The winding device includes a belt-like member feeding device, a liner feeding device, a reel for winding the belt-like member and the liner, and a control device.
The reel comprises 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 delivery device includes a brake device that applies a brake torque to delivery of the liner. 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 maintain a constant tension of the liner wound on the reel.

  Preferably, the brake device is a powder clutch brake.

  Preferably, the strip-shaped member delivery device has a function of feeding the strip-shaped member following the winding of the reel.

  Preferably, the winding device comprises a feed guide between the strip delivery device and the reel. The feed guide has a function of shifting the position of the strip-like member wound around the reel body in the axial direction of the reel body.

  Preferably, the feed guide includes a guide main body that abuts on the side surface in the width direction of the belt-like member, and a guide drive unit that moves the guide main body in the axial direction of the reel main body.

The method of manufacturing a strip-shaped member according to the present invention includes a strip-shaped member forming step of shaping a strip-shaped member of a tire, and a winding step of winding the strip-shaped member around a reel body.
In the above winding process,
A brake torque is applied to the liner which is superimposed on the belt-like member and wound on the reel body, and the brake torque is increased in response to the increase in the winding radius of the liner.

  The strip-like member includes a main portion and an edge cover that covers the widthwise end of the main portion. In the strip-shaped member forming step, an edge cover is formed at the widthwise end of the main portion. Preferably, in the winding step, the strip-like 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 belt-like member is wound around the reel body while shifting the winding position to the swing width Da in one and the other axial directions with respect to the center line Lr of the reel body. The swing width Da is preferably 10 (mm) or more and 30 (mm) or less.

  In the winding process, the belt-like member is wound around the reel body while moving from the position where the center line Lr of the reel body is at the center in the width direction to the swing width Da in one of the axial directions. The strip-shaped member is wound until it is wound around the reel main body while moving to the swing width Da, and thereafter wound around the reel main body while moving to a position where the center line Lr of the reel main body is in the width direction center. And one cycle of winding. At this time, the length by which the strip member is wound in one cycle is preferably 1 (m) or more and 7 (m) or less.

In the tire manufacturing method according to the present invention, the raw cover is a combination of a manufacturing process of a belt-like member, a cutting process of cutting the belt-like member to obtain a rubber member, and members forming each part of the tire including the rubber member. And a step of vulcanizing the raw cover to obtain a tire from the raw cover.
In the manufacturing process of the belt-like member, a brake torque is applied to a liner which is overlapped with the belt-like member and wound around the reel body, and the brake torque is increased according to the increase of the winding radius of the liner.

  In the winding device according to the present invention, it is suppressed that the tension acting on the liner is changed due to the change of the winding radius of the liner. Thereby, the deformation of the strip-like member wound on the reel is suppressed.

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

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

  In FIG. 1, a winding device 2, a band 4 as a band member, and a liner 6 are shown. Here, the winding of the band 4 will be described as an example.

  The band 4 is a belt-like member that forms a belt of a tire. The belt is disposed radially inward of the tread of the tire. The belt is laminated radially outward 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 is composed of a number of juxtaposed cords and an unvulcanized topping rubber. The edge cover 10 is made of unvulcanized rubber. In the band 4, the edge cover 10 covers the end 8 a in the width direction of the main portion 8.

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

  The winding device 2 of FIG. 1 includes an edge cover forming device 12, a strip-like member delivery device 14, a liner delivery device 16, a reel 18, a feed guide 20, and a control device 22. The arrow X in FIG. 1 is described as being forward in the front-rear direction of the winding device 2, the arrow Y is described as being rightward in the left-right direction, and the arrow Z is described as being 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 a pressure bonding roll. The rolls 24 a, 24 b and 24 c have a function of pressing the edge cover tape 26 to the width direction end 8 a 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 at the end 8 a of the main portion 8. The edge cover forming device 12 may have a function of forming the edge cover 10 at the end 8 a of the main portion 8.

  The reel 18 is provided with a reel body 28 and a reel drive unit 30. The reel body 28 includes an outer circumferential surface 28 a 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 the direction in which the band 4 and the liner 6 are wound up. The reel drive unit 30 includes a rotary drive, for example, a motor.

  The liner delivery device 16 includes a core 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 member 32 in the radial direction. The liner delivery device 16 has a function of delivering the liner 6 to the reel 18 by the reel 18 taking up the liner 6.

  Although not shown, the powder clutch brake 34 includes a coil, a fixed member, an output shaft, and magnetic powder filled between the fixed member and the output shaft. When no current is supplied to the coil, the magnetic powder is pressed to the outer peripheral side between the fixed member and the output shaft by the centrifugal force due to the rotation of the output shaft. Thereby, the output shaft can rotate without receiving the brake torque from the fixed member. On the other hand, in the state where current is supplied to this coil, the coil is excited. The magnetic powder is linked in a chain between the fixed member and the output shaft by the magnetic flux generated by the excitation of the coil. Thereby, 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 member 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 belt-like member delivery device 14 includes a pair of rollers 36 and a belt 37 stretched over the pair of rollers 36. The strip-shaped member delivery device 14 does not have a drive unit and a braking unit. The strip-shaped member delivery device 14 is disposed between the edge cover forming device 12 and the reel 18. The belt-like member delivery device 14 has a function of delivering the band 4 to the reel 18 by the reel 18 winding up the band 4. The belt-like member delivery device 14 is configured to generate almost no feed resistance. A transformer wheel may be used as the belt-like member delivery device 14.

  The belt-like member delivery device 14 does not drive the belt 4 for delivery. The strip-shaped member delivery device 14 does not brake the delivery of the band 4. The belt-like member feeding device 14 feeds the belt 4 by winding the reel 18 without applying a driving force or a braking force. In the present invention, the belt-shaped member feeding device 14 follows the winding of the reel 18 to feed the band 4 by winding the reel 18 without applying a driving force or a braking force to the band 4. It is called sending out. The strip-shaped member delivery device 14 has a function of delivering the strip 4 to the reel 18 following 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 is disposed 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 controller 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 of the winding device 2 in use. In this use state, the band 4 and the liner 6 are wound around the reel body 28. In the winding device 2, the reel drive unit 30 rotates the reel body 28 in the direction in which the band 4 and the liner 6 are wound. Thereby, the reel body 28 winds up the band 4 and the liner 6.

  The belt-like member delivery device 14 delivers the band 4 by the reel 18 taking up the band 4. The belt-like member delivery device 14 delivers the band 4 by winding the reel 18 without applying a driving force or a braking force. The strip-shaped member delivery device 14 feeds the strip 4 following the winding of the reel 18.

  The liner delivery device 16 delivers the liner 6 toward the reel 18 by the reel 18 taking up the liner 6. The liner delivery device 16 includes a powder clutch brake 34 (see FIG. 1). The powder clutch brake 34 brakes the rotation of the core 32. The liner delivery device 16 applies a brake torque to the delivery of the liner 6. The brake torque applies tension to the liner 6 wound around the reel 8.

  FIG. 3 (a) shows the front of the winding 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 leftward in the left-right direction (right side in FIG. 3A). The movement of the guide plate 18 shifts the position of the band 4 wound around the reel body 28 to the left in the axial direction of the reel body 28.

  FIG. 3 (b) shows the front of the winding device 2 in another use state. In the feed guide 20 of FIG. 3B, the guide drive unit 42 moves the guide plate 18 to the right in the left-right direction (left in FIG. 3B). The movement of the guide plate 18 shifts the position of the band 4 wound on the reel body 28 to the right in the axial direction of the reel body 28.

  3 (a) and 3 (b) indicate a center line passing through the axial center of the reel body 28 and perpendicular to the axis of the reel body 28. As shown in FIG. An alternate long and short dash line Lg represents a center line which is equidistant from the pair of guide plates 38 in the axial direction and extends parallel to the guide surface 38 a of the guide plate 38. The double arrow Da represents the axial deflection of the guide plate 38. The swing 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 body 28.

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

  The symbol As in FIG. 5 represents the center of rotation of the core 32. The code | symbol Cs represents the end point which the outer peripheral surface of the part sent toward the reel 18 and the part currently wound in the liner 6 contact | connects. The double arrow Rs represents the delivery radius of the liner 6 delivered from the core 32. The delivery 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 band 4 and the liner 6 taken up by the reel body 28 of the winding device 2. The cross sections 44 a to 44 f of the band 4 are stacked from the inside to the outside in the radial direction of the reel body 28. In the radial direction, the liner 6 is overlapped between each of the cross sections 44a to 44f. In FIG. 6, the cross sections 44 a and the cross sections 44 b of the radially adjacent strips 4 are offset in the axial direction of the reel body 28. Thereby, in the band 4, the portion of the edge cover 10 of the cross section 44a and the portion of the edge cover 10 of the cross section 44b are displaced in the axial direction. Due to the axial displacement of the edge cover 10, the radial interval between the cross section 44a and the cross section 44b of the main portion 8 is relatively small. The distance from the cross section 44b to the cross section 44f is also the same as the distance between the cross section 44a and the cross section 44b.

  A method of manufacturing a tire using the winding device 2 will be described. The tire manufacturing method includes a belt-like member manufacturing process (STEP 1), a cutting process (STEP 2), a preforming process (STEP 3), and a vulcanization process (STEP 4). The belt-like member manufacturing process (STEP 1) includes a belt-like member forming process (STEP 11) and a winding process (STEP 12).

  In the strip-shaped member forming step (STEP 11), although not shown, a strip-shaped rubber sheet is formed in which a large number of juxtaposed cords are covered with unvulcanized topping rubber. In this rubber sheet, a large number of cords extend in the longitudinal direction. The rubber sheet is cut at predetermined intervals at a predetermined angle inclined in the longitudinal direction to form a rubber sheet piece. The rubber sheet pieces are joined to form the main portion 8. In the main portion 8, the cut end of the rubber sheet piece is an end in the width direction. Thus, in the main portion 8, the cord extends obliquely with respect to the longitudinal direction.

  Furthermore, in the strip-shaped member forming process, the edge cover tape 26 is coated on the end 8 a of the main portion 8. Thus, the edge cover 10 is formed at the end 8 a of the main portion 8, and the band 4 is formed. This band 4 is sent to the winding process. Here, although the belt member 4 forming the edge cover 10 is described as an example, the edge cover 10 may not be formed. In that case, the main part 8 is sent to the winding process as a strip-like member.

  In the winding process (STEP 12), the reel drive unit 30 rotates the reel body 28 in the direction in which the band 4 is wound up. The reel 18 superposes and winds the band 4 and the liner 6. The reel drive unit 30 winds the band 4 and the liner 6 with a constant winding torque.

  The strip-shaped member delivery device 14 feeds the strip 4 following the reel 18 taking up the strip 4.

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

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

  In the liner delivery device 16, the reel 18 delivers the liner 6 by winding the band 4. The liner delivery device 16 applies a brake torque to the core 32 for delivering the liner 6. A braking force acts on the delivery of the liner 6 by the brake torque. A predetermined tension acts on the liner 6.

  The relationship between the winding radius Rr of the liner 6 and the brake torque T acting on the liner delivery device 16 is shown in FIG. The horizontal axis in FIG. 7 is the winding radius Rr of the liner 6, and the vertical axis is the brake torque T. The symbol Rb represents the winding start radius of the liner 6, and the symbol Rf represents the winding complete radius of the liner 6. The symbol Tb represents the initial brake torque of the liner delivery device 16, and the symbol Tf represents the final brake torque of the liner delivery device 16. The initial brake torque is, for example, not less than 0.05 (N · m) and not more than 5 (N · m). The final brake torque is, for example, 1 (N · m) or more and 10 (N · m) or less.

  In the winding device 2, the band 4 and the liner 6 are wound around the reel body 28, so that the winding 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 complete radius Rf. In response to the increase of the winding radius Rr of the liner 6, the brake torque T is increased. The 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. Furthermore, the controller 22 calculates and stores the torque change rate A based on the start radius Rb, the complete radius Rf, the initial brake torque Tb and the final brake torque Tf. The torque change rate A is calculated by the following equation (1).
A = (Tf-Tb) / (Rf-Rb) (1)

In this winding device 2, although not shown, the winding radius Rr of the liner 6 is measured by an optical sensor. The controller 22 increases the brake torque T from the winding radius Rr according to the following equation (2).
T = A · Rr + Tb (2)
FIG. 7 shows the relationship in which the brake torque T is thus increased in response to the increase of the winding radius Rr. The winding radius Rr and the brake torque T are expressed as a linear function.

  Here, although the winding radius Rr was measured by the optical sensor, it is not limited thereto. For example, the number of rotations of the reel body 28 is input as data to the control device 22 from the start radius Rb to the completion radius Rf. The winding radius Rr is calculated from the number of rotations of the reel body 28, the start radius Rb, and the increment of the radius per rotation of the reel body 28 (the sum of the thickness of the band 4 and the thickness of the liner 6). It may be done.

  Thus, a wound body in which the band 4 and the liner 6 are wound is obtained. This wound body is sent to the next step.

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

  In the preforming step (STEP 3), the low cover is formed by combining this belt member with other rubber members forming the respective portions of the tire such as the tread member forming the tread and the sidewall member forming the sidewall. .

  In the vulcanization step (STEP 4), the raw cover is vulcanized and formed in a mold. By this vulcanization molding, a tire is obtained from the raw cover.

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

  In the liner delivery device 16, the powder clutch brake 34 applies a brake torque T to delivery of the liner 6. The controller 22 controls the brake torque T of the powder clutch brake 34. The controller 22 increases the brake torque T of the powder clutch brake 34 in response to the increase of the winding radius Rr of the liner 6. Corresponding to the increase of the winding radius Rr of the liner 6, the braking force on the winding increases. The braking force increases in size not to exceed the winding force acting on the liner 6 when the braking force acts.

  In this winding device 2, the increase in the winding radius Rr reduces the winding force that the liner 6 receives. In response to the increase of the winding radius Rr, the braking force of the liner 6 is increased. The increase in braking force suppresses the decrease in tension acting on the liner 6. In the winding device 2, the change in tension of the liner 6 is suppressed.

  When the tension of the liner 6 is too strong, the band 4 is tightened strongly. This strong clamping force deforms the band 4. The cross-sectional shape of the band 4 is impaired. On the other hand, when the tension of the liner 6 is too weak, the liner 6 is slackened. The slack causes the winding collapse of the band 4 and the deformation of wrinkles or the like on the surface of the band 4.

  In the winding device 2, the change in tension of the liner 6 is suppressed. It is suppressed that the tension of the liner 6 is too strong or too weak. In the winding device 2, the liner 6 can be wound with the band 4 by applying appropriate tension. In the winding device 2, deformation of the band 4 due to a change in tension of the liner 6 is suppressed.

  In this winding device 2, the winding force received by the liner 6 is reduced by the increase of the winding radius Rr. The controller 22 makes the ratio of the increase amount of the braking force to the increase amount of the winding radius Rr constant to increase the braking force. Thereby, the controller 22 can make the tension of the liner 6 substantially constant. Maintaining the tension of the liner 6 constant contributes to the suppression of the deformation of the band 4.

  The thickness of the liner 6 is extremely smaller than the thickness of the band 4. Therefore, the rate of change of the delivery radius Rs is extremely smaller than the rate of change of the take-up radius Rr of the liner 6. Therefore, the control device 22 calculates the brake torque T by omitting the change in the braking force of the liner 6 due to the decrease of the delivery radius Rs. The braking device 22 may calculate the braking torque T in consideration of the change in the braking force of the liner 6 due to the reduction of the delivery radius Rs.

  In the winding device 2, a powder clutch brake 34 is provided as a braking device. The powder clutch brake 34 can increase or decrease the brake torque by increasing or decreasing the magnitude of the current supplied to the coil. The brake torque can be controlled by controlling the magnitude of the current. By using this powder clutch brake 34, control of the tension of the liner 6 is facilitated.

  In the winding device 2, the strip-shaped member delivery device 14 feeds the strip 4 following the winding of the reel 18. By moving the band 4 in the direction in which the band 4 is wound, a resistance due to its own weight is generated in the band 4. When the strip delivery device 14 is driven to deliver the strip 4, the strip delivery device 14 causes the strip 4 to hardly generate this feeding resistance. As a result, the band 4 does not generate a large tension. Thus, the band 4 is wound around the reel body 28 without being subjected to a large tension. The band 4 is restrained from deformation due to tension. From the viewpoint of reducing the resistance due to delivery, the strip-like member delivery device 14 may use a transwheel in which a plurality of rotatable small rollers are disposed in the circumferential direction on the outer periphery of the rotatable roller body. Good.

  Furthermore, this band 4 is superimposed on the liner 6 whose tension is kept constant. Thereby, the cross-sectional shape of the band 4 is made constant in the longitudinal direction. The winding device 2 contributes to the suppression of the deformation of the band 4. This contributes to the improvement of the shape accuracy of the tire using the band 4.

The winding 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 radial overlap of the edge covers 10 of the strip 4 is reduced. At the center in the width direction, the gap produced by the overlapping of the band members 4 is smaller than that in the state of FIG. The occurrence of the slack of the band 4 at the center in the width direction is suppressed. The suppression of the occurrence of the slack suppresses the deformation of the band 4. In addition to the adjustment of the tension of the liner 6, the winding device 2 can further suppress the deformation of the band 4 by shifting the position of the belt member 4 in the axial direction of the reel body 18 and winding it.

  In the 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 invention is not limited thereto. As shown in FIG. 11, in the axial direction of the reel body 28, it may be wound around the reel body 28 without shifting the band 4. In the winding device 2, variations in the tension of the liner 6 and the tension of the band 4 which are wound around the reel body 28 are suppressed. By suppressing the variation in tension, partial deformation of the liner 6 and the band 4 in the longitudinal direction is suppressed. In the winding device 2, deformation of the band 4 is reduced even if the band 4 is wound around the reel body 28 without shifting in the axial direction.

  In the winding device 2, the feed guide 20 includes a pair of guide plates 38 that contact the side surface in the width direction of the band 4, and a guide drive unit 30 that moves the guide plates 38 in the axial direction. As a result, the position of the band 4 can be adjusted more accurately and more accurately. The feed guide 20 can adjust the position of the band 4 with a simple configuration.

  Here, although the band 4 has been described as an example, the band-shaped member is not limited to the band 4. The belt-like member includes, for example, a tread band to be a tread member, a sidewall band to be a sidewall member, a clinch band to be a clinch member, a carcass band to be a carcass member, and an inner liner member. Inner liner strips and the like.

  In FIG. 8 a part of another winding device 52 according to the invention is shown together with the strip 4. The arrow X in FIG. 8 is forward in the front-rear direction of the winding device 52, the arrow Y is rightward in the left-right direction, and the arrow Z is upward in the vertical direction. The arrow F represents the direction in which the band 4 is sent. The configuration of the winding device 52 different from that of the winding device 2 will be described. The description of the configuration of the winding device 52 similar to that of the winding device 2 is omitted. Moreover, about the structure similar to the winding device 2, it demonstrates using the same code | symbol.

  The winding device 52 has a configuration similar to that of the winding device 2 except that a feeding guide 54 is provided instead of the feeding guide 20. The winding device 52 includes an edge cover forming device 12, a strip-like member delivery device 14, a liner delivery 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 driving unit 42 (not shown). Three feed rollers 56 are arranged at intervals in the feeding direction of the band 4. Due to this spacing, the guide roller assemblies 58 are respectively disposed in the space formed between the feed rollers 56.

  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-like shape. The outer peripheral surface 64 a of the roller main body 64 is formed by a curved surface that protrudes outward in the radial direction. The single arrow Rp in FIG. 9 represents the radius of curvature of the outer peripheral surface 64 a. 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 a 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 of the guide rollers 66 is rotatably mounted so as to rotate in a direction perpendicular to the feeding direction of the band 4 and the left and right direction. Although not shown, the pair of guide roller assemblies 58 can be moved laterally by the guide drive unit 42.

  In FIG. 10A, the pair of guide rollers 66 is moved leftward in the left-right direction (right side in FIG. 10A) by the guide drive unit 42. The pair of guide rollers 66 is disposed with the band 4 in between. The pair of guide rollers 66 move to the left with a swing width Da with respect to the center line Lr of the reel body 28. As a result, the band 4 moves to the left with a swing width Da with respect to the center line Lr of the reel body 28. A dashed-dotted line Lg in FIG. 10A indicates a center line that is equidistant from the pair of guide rollers 66 in the axial direction and extends parallel to the axis of the guide rollers 66.

  In FIG. 10B, the pair of guide rollers 66 is moved to the right in the left-right direction (left side in FIG. 10B) by the guide drive unit 42. The pair of guide rollers 66 moves to the right with a swing width Da. Thus, the band 4 is moved to the right 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 is moved in one axial direction by the swing width Da, and is brought into the state of FIG. As a result, in the axial direction, the position at which the band 4 is wound around the reel body 28 deviates from the center line Lr by one swing width Da. When the pair of guide rollers 66 reaches the position of FIG. 10A, it is moved toward the other in the axial direction. The pair of guide rollers 66 is moved in the other axial direction by the swing width Da, and is brought into the state of FIG. Further, the pair of guide rollers 66 moves 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 repeats 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 on the reel body 28 while changing its position in the axial direction. In the winding device 52, the swing width Da to the left and right is, for example, 20 (mm). The pair of guide rollers 66 has, for example, a winding length of the band 4 of 4 (m) in one cycle. The pair of guide rollers 66 repeat movement of one cycle every winding length 4 (m).

  By increasing the swing width Da, the overlapping in the radial direction of the edge cover 10 can be reduced in the band 4. From this point of view, the swing width Da is preferably 10 (mm) or more, and more preferably 15 (mm) or more. On the other hand, if the swing width Da is too large, winding collapse may occur or wrinkles may occur in the belt member 4. From this point of view, the swing 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 cover 10 of the band 4 can be reduced. From this point of view, 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, winding collapse may occur or wrinkles may occur in the belt member 4. From this point of view, 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 abuts on the band 4. The guide roller 66 is rotatably mounted about a direction perpendicular to the feeding direction of the band 4. The guide roller 66 is suppressed from interfering with 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 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. Thereby, the movement of the strip 4 in the left-right direction is facilitated. Since the outer peripheral surface 64a of the roller main body 64 is formed to be a curved surface, movement of the band 4 in the left-right direction is further facilitated. A transformer wheel may be used as the feed roller 56. By this transformer wheel, the lateral movement may be facilitated with little generation of feed resistance in the band 4.

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

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

Example 1
Instead of the feed guide shown in FIG. 1, a winding device was prepared which was configured the same as the winding device shown in FIG. 1 except that the feed guide shown in FIG. 8 was provided. In this winding device, the band shown in FIG. 1 was wound. The strip had a length of 1000 (m) and a width of 0.2 (m). As shown in Table 1, the swing width Da was 20 (mm) on each of the left and right, and the winding length in one cycle was 4 (m).

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

Embodiment 2-3
The band was wound up in the same manner as in Example 1 except that the swing widths Da of the left and right sides were as shown in Table 1, respectively.

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

[Evaluation]
With respect to the band wound around the reel body, the occurrence of winding collapse and the occurrence of wrinkles were inspected. In this evaluation, the evaluation result of Comparative Example 1 is used as a reference value 3, and the other evaluation results are expressed as an index. This index is a 5-step rating, and the larger the value, the better.

  As shown in Table 1, in the manufacturing method of the example, the evaluation is higher than the manufacturing method of the comparative example. The superiority of the present invention is clear from the evaluation results.

  The method described above can be broadly applied to the manufacture of a band comprising rubber forming part of a tire.

2, 52 ... winding device 4 ... band 6 ... liner 8 ... main part 10 ... edge cover 12 ... edge cover forming device 14 ... belt-like member delivery device 16 · liner delivery device 18 ... reel 20,54 ... feed guide 22 ... controller 24 ... press roll 26 ... edge cover tape 28 ... reel body 30 ... reel driving unit 32: core portion 34: powder clutch brake 36: roller 38: guide plate 40, 68: connecting portion 42: guide driving portion 56: feed roller 58: guide Roller assembly 64 ··· Roller body 66 · · · Guide roller

Claims (11)

A take-up device for taking up a strip-shaped member forming a tire member on a liner and winding it,
A belt-like member feeding device, a liner feeding device, a reel for winding the belt-like member and the liner, and a control device;
The reel comprises a reel body for winding the strip-like member and the liner, and a reel drive unit for rotating the reel body in a winding direction.
The liner delivery device includes a brake device for applying a brake torque to delivery of the liner,
A winding device, wherein the control device has a function of controlling a brake torque applied by the brake device, and a function of increasing a brake torque of the brake device in accordance with an increase in a winding 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 winding device according to claim 1 or 2, wherein the braking device is a powder clutch brake.   The winding device according to any one of claims 1 to 3, wherein the belt-like member delivery device has a function of following the winding of the reel and delivering the belt-like member. A feed guide is provided between the strip member delivery device and the reel,
The winding device according to any one of claims 1 to 4, wherein the feeding 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.   6. The winding device according to claim 5, further comprising: a guide main body in which the feed guide contacts the side surface in the width direction of the belt-like member; and a guide drive portion moving the guide main body in the axial direction of the reel main body. A belt-like member forming step of forming a belt-like member of a tire;
And a winding step of winding the strip-like member around a reel body,
In the above winding process,
A method of manufacturing a strip-shaped member, wherein a brake torque is applied to a liner that is superimposed on the strip-shaped member and wound on 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 of the main portion,
In the strip-shaped member forming step, an edge cover is formed at the widthwise end of the main portion,
The method according to claim 7, wherein in the winding step, the belt-like 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 member is wound around the reel body while shifting the winding position to the swing width Da in one and the other axial directions with respect to the center line Lr of the reel body,
The manufacturing method of the strip-shaped member according to claim 8, wherein the swing width Da is 10 (mm) or more and 30 (mm) or less.   In the winding process, the belt-like member is wound around the reel body while moving from the position where the center line Lr of the reel body is at the center in the width direction to the swing width Da in the axial direction, and then it is shaken in the other axial direction. The belt-like member is wound until it is wound around the reel body while moving to the width Da, and thereafter wound around the reel body while moving to a position where the center line Lr of the reel body is in the width direction center. The manufacturing method of the strip-shaped member according to claim 8 or 9, wherein the length by which the strip-shaped member is wound in one cycle is 1 (m) or more and 7 (m) or less when one cycle of winding is performed. A manufacturing process of a strip-shaped member,
A cutting step in which the belt-like member is cut to obtain a rubber member;
A preforming step of forming a raw cover by combining members forming the respective portions of the tire including the rubber member;
And a vulcanizing step of vulcanizing and molding the low cover to obtain a tire from the low cover.
In the manufacturing process of the above strip-shaped member,
A tire manufacturing method, wherein a brake torque is applied to a liner which is superimposed on the strip-shaped member and wound on a reel body, and the brake torque is increased in response to an increase in a winding radius of the liner.

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