JP7379084B2 - Pneumatic tire manufacturing method and manufacturing equipment - Google Patents

Description

The present disclosure relates to a method and apparatus for manufacturing a pneumatic tire.

Conventionally, for example, in a pneumatic tire manufacturing method, a needle is used to make a through hole in a specific member of a cylindrical tire component in which a plurality of members are wound around and supported on the outer peripheral surface of a support body. After that, a plurality of members are crimped together using a crimping roller (for example, Patent Document 1). By the way, when manufacturing pneumatic tires, there is a demand for increased manufacturing efficiency.

Japanese Patent Application Publication No. 2016-097559

An object of the present disclosure is to provide a pneumatic tire manufacturing method and manufacturing apparatus that can improve manufacturing efficiency.

A method for manufacturing a pneumatic tire includes rolling a base material and a rubber member in this order onto the outer circumferential surface of a support, and applying a needle roller to the rubber member for a cylindrical tire component supported by the support. to form a through hole passing through the rubber member; and pressing a pressure roller different from the needle roller to at least a region of the rubber member in which the through hole is formed, and press a pressure roller different from the needle roller to forming a through hole passing through the rubber member, and press-bonding the base material and the rubber member to the same tire component; and in parallel.

In addition, the pneumatic tire manufacturing apparatus is configured to wrap a base material and a rubber member in this order on the outer circumferential surface of a support body, and to apply the rubber member to a cylindrical tire component supported by the support body. A roller with a needle that is pressed against the rubber member in order to form a through hole is a different roller from the roller with a needle, and a roller of the rubber member that presses the base material and the rubber member is a different roller. A pressure roller is provided that is pressed against at least a region in which the through hole is formed, and the needle roller and the pressure roller are simultaneously pressed against the tire component.

Cross-sectional view of main parts of a pneumatic tire in the tire meridian plane Schematic diagram of a tire manufacturing apparatus according to this embodiment Enlarged schematic diagram of main parts of the tire manufacturing device according to the embodiment A schematic diagram of the temporary fixing roller according to the embodiment A schematic diagram of a roller with needles according to the same embodiment Schematic diagram of the pressure roller according to the embodiment Control block diagram of the tire manufacturing apparatus according to the embodiment Manufacturing flow diagram of the pneumatic tire according to the embodiment An explanatory diagram of a method for manufacturing a pneumatic tire according to the embodiment An explanatory diagram of a method for manufacturing a pneumatic tire according to the embodiment An explanatory diagram of a method for manufacturing a pneumatic tire according to the embodiment Schematic diagram of a tire manufacturing device according to another embodiment

Hereinafter, one embodiment of a tire manufacturing method and a tire manufacturing apparatus will be described with reference to FIGS. 1 to 11. Note that in each figure (the same applies to FIG. 12), the dimensional ratio in the drawing and the actual dimensional ratio do not necessarily match, and the dimensional ratio between each drawing does not necessarily match.

First, a pneumatic tire manufactured by a tire manufacturing method and a tire manufacturing apparatus will be described with reference to FIG. 1.

FIG. 1 shows a cross-sectional view of a main part of a pneumatic tire taken along a tire meridian plane. Note that, since the configuration of the main part of the tire is symmetrical with respect to the tire equatorial plane C1, FIG. 1 shows only one side in the tire width direction from the tire equatorial plane C1.

As shown in FIG. 1, the pneumatic tire T1 includes a pair of bead portions 1, a pair of sidewall portions 2 extending outward in the tire radial direction from each of the bead portions 1, and a tire portion of each of the sidewall portions 2. The tread portion 3 is provided with a tread portion 3 continuous to the outer end in the radial direction. Note that the pneumatic tire T1 is vulcanized and is mounted on a rim (not shown).

The tire width direction is a direction parallel to the tire rotation axis which is the rotation center of the pneumatic tire T1, the tire radial direction is the diametric direction of the pneumatic tire T1, and the tire circumferential direction is a direction parallel to the tire rotation axis which is the rotation center of the pneumatic tire T1. It is the direction. Further, the tire equatorial plane C1 is a plane perpendicular to the tire rotation axis and is located at the center of the pneumatic tire T1 in the tire width direction, and the tire meridian plane is a plane including the tire rotation axis. , which is a plane perpendicular to the tire equatorial plane C1.

The bead portion 1 includes a bead member 4. The bead member 4 includes an annular bead core and an annular bead filler connected to the outside of the bead core in the tire radial direction. Although not particularly limited, the bead core may be formed by laminating rubber-coated bead wires (for example, bronze-plated steel wires, etc.). Further, although not particularly limited, the bead filler may be made of hard rubber.

The pneumatic tire T1 includes a carcass ply 6 spanning between a pair of bead members 4 to function as the frame of the tire, and a carcass ply 6 disposed inside the carcass ply 6 to function as the frame of the tire. The inner liner 7 has an excellent function of preventing The carcass ply 6 and the inner liner 7 are arranged along the inner circumference of the tire, covering the bead portion 1, the sidewall portion 2, and the tread portion 3.

The carcass ply 6 is folded back around the bead member 4 so as to wrap around the bead member 4. Although not particularly limited, the carcass ply 6 may be formed by covering a plurality of cords (for example, made of organic fibers) with topping rubber. Furthermore, although not particularly limited, one carcass ply 6 is provided in this embodiment.

The bead portion 1 includes a rim strip rubber 1a arranged on the outside of the carcass ply 6 in the tire width direction to form an outer surface, and a rim strip rubber 1a arranged on the outside of the carcass ply 6 to protect the carcass ply 6 from friction with the rim. The chafer 8 is folded back around the bead member 4 so as to wrap around the bead member 4. Note that, although not particularly limited, the rim strip rubber 1a may be formed of hard rubber. Although not particularly limited, the chafer 8 may include a plurality of cords and a topping rubber covering the cords.

The sidewall portion 2 includes sidewall rubber 9 disposed on the outside of the carcass ply 6 in the tire width direction to constitute the outer surface of the tire. The tread portion 3 also includes a belt 11 disposed on the outside of the carcass ply 6 in the tire radial direction, a reinforcing layer 12 disposed on the outside of the belt 11 in the tire radial direction, and a tread surface (contact surface) in contact with the ground. tread rubber 13 disposed outside the reinforcing layer 12 in the tire radial direction.

Next, the tire manufacturing apparatus will be explained with reference to FIGS. 2 to 7.

FIG. 2 shows a schematic diagram of the tire manufacturing apparatus 90. As shown in FIG. 2, the tire manufacturing apparatus 90 includes a winding device 91 around which the tire component 10 is wound, and a roller device 92 that is pressed against the tire component 10. Note that the tire constituent members 10 are members 1a, 4, 6 to 9, and 11 to 13 including at least one member constituting the pneumatic tire T1.

The winding device 91 includes a rotating shaft 52 and a support body 50 that rotates around the rotating shaft 52. The tire component 10 is supported by being wrapped around the outer circumferential surface 53 of the support body 50 in a cylindrical shape. In addition, in FIG. 2, the tire component 10 and the support body 50 are each shown with a part of the outer circumferential area cut out (having a notch), but in reality, the tire component 10 and the support body 50 have the notch. Not yet.

Further, in FIG. 2 (the same applies to FIG. 3 and subsequent figures), the first direction D1 is the axial direction D1 of the support body 50 and the axial direction D1 of the tire component 10, and the second direction D2 is the axial direction D1 of the support body 50. and the radial direction of the tire component 10, the direction D2 in which the roller device 92 and the support body 50 face each other, and the third direction D3 is the first direction D1 and the second direction D3, respectively. This is a perpendicular direction D3. In addition, in FIG. 2, line C2 is a line parallel to the second direction D2 among the central planes of the support body 50 (tire component 10) in the axial direction D1.

The support body 50 may be configured to be divisible into a plurality of members in the axial direction D1 and the circumferential direction. According to such a configuration, for example, the diameter of the support body 50 can be increased (or decreased) in each region in the axial direction D1. Thereby, for example, the wrapped tire component 10 can be easily removed.

Note that the support body 50 may be formed, for example, in a hollow cylindrical shape, or may be formed, for example, in a solid columnar shape. Further, the outer circumferential surface 53 may be formed, for example, in a circular shape (a perfect circle shape, an elliptical shape), or may be formed in a polygonal shape, for example, when viewed in the axial direction D1.

As shown in FIGS. 2 and 3, the roller device 92 includes a roller unit 93 having a plurality of rollers 20, 30, and 40, and a moving mechanism 94 that can move each roller 20, 30, and 40. Note that, although not particularly limited, the roller device 92 has two roller units 93 arranged in parallel in the axial direction D1, and the two roller units 93 are attached to the center plane of the support body 50 (tire component 10) in the axial direction D1. It is constructed so as to be symmetrical with respect to the

FIG. 3 shows a schematic view of the main parts of the roller device 92, and shows one roller unit 93 in an enlarged manner. As shown in FIG. 3, the roller unit 93 includes a temporary fixing roller 20 that temporarily fixes members of the tire component 10, a needle roller 30 that forms a through hole in a specific member of the tire component 10, and a tire roller 20 that temporarily fixes members of the tire component 10. It includes a pressure roller 40 that presses the members of the component 10 together.

Each roller 20, 30, 40 is configured to be rotatable around an axis along the axial direction D1. Each of the rollers 20, 30, and 40 is configured to be rotatable by the frictional force generated upon contact with the tire component 10. Note that each of the rollers 20, 30, and 40 may be configured to be rotatable by being rotationally driven by a drive source (not shown).

The moving mechanism 94 includes a shaft drive mechanism 61 that moves each roller 20, 30, 40 in the axial direction D1, and a radial drive mechanism 62 that moves each roller 20, 30, 40 in the radial direction D2. Although not particularly limited, in this embodiment, the roller unit 93 includes a base portion 95 to which each roller 20, 30, 40 is connected, and the shaft drive mechanism 61 moves the base portion 95 in the axial direction D1. The radial drive mechanism 62 is configured to be able to move the base portion 95 in the radial direction D2.

Although the configuration of the shaft drive mechanism 61 is not particularly limited, in the present embodiment, the shaft drive mechanism 61 includes an shaft movement section 63 connected to the base section 95 and moved in the axial direction D1; A transmission section 65 that transmits the drive of the first drive source 64 to the shaft moving section 63 is provided. Then, as the shaft moving section 63 moves in the axial direction D1, the base section 95 moves in the axial direction D1. For example, the shaft drive mechanism 61 can employ a ball screw mechanism.

Although the configuration of the radial drive mechanism 62 is not particularly limited, in this embodiment, the radial drive mechanism 62 includes a radial moving part 66 that is fixed to the base part 95 and movable in the radial direction D2 with respect to the axis moving part 63. We are prepared. Then, as the radial moving section 66 moves in the radial direction D2 by the drive of the second drive source 67, the base section 95 moves in the radial direction D2. For example, the radial drive mechanism 62 can employ an actuator (eg, a power (hydraulic, pneumatic, electric) cylinder, solenoid).

Each roller 20, 30, 40 is moved in the radial direction D2 by the radial drive mechanism 62 and pressed against the tire component 10. Note that the temporary fixing roller 20 is arranged on the inner side in the axial direction D1 (center surface side) than the needle roller 30, and the needle roller 30 is arranged on the inner side in the axial direction D1 than the pressure roller 40. There is. As a result, the shaft drive mechanism 61 moves each of the rollers 20, 30, and 40 inward in the axial direction D1, so that the predetermined area of the tire component 10 is They are forced in order.

The roller unit 93 also includes a first connecting portion 21 that connects the base portion 95 and the temporary fixing roller 20, a second connecting portion 31 that connects the base portion 95 and the needle roller 30, and a press-bonded portion with the base portion 95. A third connecting portion 41 that connects to the roller 40 is provided. The roller unit 93 includes a first force applying section 22 that applies force to the temporary fixing roller 20, a second force applying section 32 that applies force to the needle roller 30, and a third force applying section 32 that applies force to the pressure roller 40. 42.

The first connecting portion 21 includes a first fixed portion 23 fixed to the base portion 95, a first movable portion 24 movable in the radial direction D2 with respect to the first fixed portion 23, and a temporarily fixed portion to the first movable portion 24. A first bearing 25 rotatably connects the roller 20. In this embodiment, the first force applying part 22 is an elastic body 26 (for example, a spring) that can be elastically deformed in the radial direction D2, and the elastic body 26 is connected to the first fixed part 23 and the first bearing 25. , and applies an elastic restoring force to the temporary fixing roller 20.

The second connecting portion 31 includes a second fixed portion 33 fixed to the base portion 95, a second movable portion 34 movable in the radial direction D2 with respect to the second fixed portion 33, and a needle attached to the second movable portion 34. A second bearing 35 rotatably connects the roller 30. In the present embodiment, the second force application section 32 includes a drive source 36, which is an actuator (for example, a power (hydraulic, pneumatic, electric) cylinder, solenoid) that applies force to the second movable section 34. It is said that

The third connecting part 41 includes a third fixing part 43 fixed to the base part 95 and a third bearing 44 rotatably connecting the pressure roller 40 to the third fixing part 43. In the present embodiment, the third force application section 42 includes a drive source 67, which is an actuator (for example, a power (hydraulic, pneumatic, electric) cylinder, solenoid) that applies force to the third fixed section 43. It is said that Note that the drive source 67 of the third force applying section 42 also serves as the second drive source 67 of the radial drive mechanism 62.

When each roller 20 , 30 , 40 is pressed against the tire component 10 , the force that the second force application section 32 applies to the needle roller 30 is the same as the force that the first force application section 22 applies to the temporary fixing roller 20 . It's bigger than that. Furthermore, when the rollers 20, 30, and 40 are pressed against the tire component 10, the force that the third force application section 42 applies to the pressure roller 40 is greater than the force that the second force application section 32 applies to the needle roller 30. It's getting bigger too.

As a result, the force with which the needle roller 30 pushes the tire component 10 is greater than the force with which the temporary fixing roller 20 pushes the tire component 10, and the force with which the pressure roller 40 pushes the tire component 10 is This force is greater than the force with which the attached roller 30 pushes the tire component 10. Note that, although not particularly limited, in this embodiment, the forces that the second and third force application parts 32 and 42 apply to each roller 30 and 40 are configured to be changeable.

By the way, the moving mechanism 94 includes a roller moving mechanism 96 that moves the needle roller 30 in the radial direction D2 with respect to the temporary fixing roller 20 and the pressure roller 40. Then, the needle roller 30 is moved by the roller movement mechanism 96 between a pressing position where it is pressed against the tire component 10 and a standby position where it is separated from the tire component 10. Although not particularly limited, in this embodiment, the second connecting section 31 and the second applying section 32 cooperate to form the roller moving mechanism 96.

Further, in the state where the elastic body 26 is restored, the temporary fixing roller 20 is arranged closer to the support body 50 than the pressure roller 40. Thereby, when the pressure roller 40 is pressed against the tire component 10, the temporary fixing roller 20 is always pressed against the tire component 10.

FIG. 4 is an enlarged view of the temporary fixing roller 20, in which (a) is a side view (a view seen in the direction opposite to the direction of the arrow in the first direction D1), and (b) is a front view (the third FIG. As shown in FIG. 4, the outer peripheral surface of the temporary fixing roller 20 is formed in an uneven shape. Specifically, the temporary fixing roller 20 includes a convex portion 20a and a concave portion 20b on the outer circumference, and the convex portions 20a and the concave portions 20b are arranged alternately in the circumferential direction (rotation direction). Note that, although not particularly limited, the temporary fixing roller 20 may be formed of a rigid material such as metal.

Further, each dimension W21 to W24 of the temporary fixing roller 20 is not particularly limited. For example, each dimension W21 to W24 of the temporary fixing roller 20 is set appropriately so that the members of the tire component 10 can be properly temporarily fixed.

The outer diameter W21 of the temporary fixing roller 20 may be, for example, 65 mm to 100 mm. Furthermore, the width W22 of the temporary fixing roller 20 may be, for example, 3 mm to 7 mm. Further, the circumferential length W23 of the convex portion 20a may be, for example, 5 mm to 9 mm. Further, the circumferential length W24 of the recess 20b may be, for example, 5 mm to 9 mm. Note that the circumferential length W23 of the convex portion 20a and the circumferential length W24 of the recessed portion 20b may be the same or different.

FIG. 5 is an enlarged view of the needle roller 30, in which (a) is a side view (a view seen in the direction opposite to the arrow direction of the first direction D1), and (b) is a front view (a view in the direction opposite to the arrow direction of the first direction D1). FIG. As shown in FIG. 5, the needle roller 30 includes a roller main body 30a whose outer peripheral surface is a smooth curved surface, and a plurality of needles 30b protruding outward in the radial direction from the outer peripheral surface of the roller main body 30a. .

The plurality of needles 30b are arranged so as to be lined up in the circumferential direction. Although not particularly limited, in this embodiment, the needles 30b are arranged in one row in the width direction. Note that, although not particularly limited, the needle roller 30 may be formed of a rigid material such as metal.

Further, each dimension W31 to W35 of the needle roller 30 is not particularly limited. For example, the dimensions W31 to W35 of the needle roller 30 are set so that through holes can be appropriately formed in the tire component 10, and so that no trace of the through holes remains in the tire T1 after vulcanization. It is set appropriately.

The outer diameter W31 of the needle roller 30 (roller main body 30a) may be, for example, 65 mm to 100 mm. Further, the width W32 of the needle roller 30 (roller main body 30a) may be, for example, 5 mm to 15 mm. Further, the length W33 in the circumferential direction between the needles 30b, 30b (specifically, between the centers of the needles 30b, 30b) may be, for example, 5 mm to 10 mm. Further, the diameter W34 of the proximal end of the needle 30b may be, for example, 1 mm to 2 mm. Further, the length W35 of the needle 30b may be, for example, 4 mm to 6 mm.

FIG. 6 is an enlarged view of the pressure roller 40, in which (a) is a side view (a view seen in the direction opposite to the direction of the arrow in the first direction D1), and (b) is a front view (a view in the direction opposite to the arrow direction of the first direction D1). FIG. As shown in FIG. 6, the pressure roller 40 includes a central region 40a arranged at the center in the width direction and an end region 40b arranged at the ends in the width direction. The outer diameter of the end region 40b becomes smaller toward the outside in the width direction. Note that, although not particularly limited, at least the outer peripheral surface of the pressure roller 40 may be formed of an elastic material such as rubber.

Further, each dimension W41 to W44 of the pressure roller 40 is not particularly limited. For example, the dimensions W41 to W44 of the pressure roller 40 are appropriately set so that the members of the tire component 10 can be appropriately pressure-bonded.

The outer diameter W41 of the pressure roller 40 may be, for example, 65 mm to 100 mm. Further, the width W42 of the pressure roller 40 may be, for example, 9 mm to 21 mm. Further, the width W43 of the central region 40a of the pressure roller 40 may be, for example, 5 mm to 15 mm. Further, the width W44 of the end region 40b of the pressure roller 40 may be 2 mm to 3 mm.

FIG. 7 is a control block diagram in the tire manufacturing apparatus 90. As shown in FIG. 7, the tire manufacturing apparatus 90 includes an input section 81 into which information is input, and a control section 80 that controls each section. The input unit 81 is, for example, a switch, a sensor, etc., and information regarding tire manufacturing is input thereto. In order to manufacture the tire T1, the control unit 80 controls, for example, the shaft drive mechanism 61 (first drive source 64), the radial drive mechanism 62 (second drive source 67), and the roller moving mechanism 96 (drive source 36). control.

Next, a tire manufacturing method will be described with reference to FIGS. 8 to 10.

FIG. 8 is a flow diagram showing an example of a method for manufacturing the pneumatic tire T1. As shown in FIG. 8, the method for manufacturing the pneumatic tire T1 includes a winding step S10, a temporary fixing step S20, a through hole forming step S30, a crimping step S40, a laminating step S50, and a vulcanizing step S60. Contains.

<Wrapping step S10>
FIG. 9 is an enlarged sectional view of the main parts of the tire component 10 when the winding step S10 is completed. Note that the names and symbols of the members constituting the unvulcanized tire T1 are the same as those of the members constituting the cured tire T1.

First, the inner liner 7, the chafer 8, the carcass ply 6, and the bead member 4 are layered in this order and wound around the support body 50 so as to form a cylindrical shape. At this time, each member 7, 8, 6, 4 is wound around the outer peripheral surface 53 of the support body 50 as the support body 50 rotates. Then, the carcass ply 6 and chafer 8 are folded back around the bead member 4 so as to wrap around the bead member 4.

Thereafter, by rotating the support body 50, the sidewall rubber 9 is laminated on the carcass ply 6 and wound around the support body 50 so as to form a cylindrical shape. As a result, the tire component 10 as shown in FIG. 9 is wound around the support body 50. In the tire component 10 shown in FIG. 9, the sidewall rubber 9 is also referred to as the rubber member 9, and the portion excluding the sidewall rubber 9 is also referred to as the base material 5.

The outer circumferential surface of the base material 5 has a first region 5a disposed at the center in the axial direction D1, a second region 5b disposed outside the first region 5a in the axial direction D1, and an axial direction of the second region 5b. A third region 5c disposed outside D1. In the second region 5b, the end region 6a of the carcass ply 6 is laminated on the central region 6b of the carcass ply 6, and in the third region 5c, the chafer 8 is laminated on the end region 6a of the carcass ply 6. Laminated.

Thereby, the second region 5b is located on the outer side in the radial direction than the first region 5a, and the third region 5c is located on the outer side in the radial direction than the second region 5b. As a result, the outer peripheral surface of the base material 5 has a step 5d between the first region 5a and the second region 5b, and a step 5d between the second region 5b and the third region 5c. It is equipped with

<Temporary fastening step S20>
FIG. 10 is an explanatory diagram when performing each step S20, S30, and S40, and is a diagram showing the tire component 10 in cross section. In the temporary fixing step S20, the temporary fixing roller 20 is pressed against the sidewall rubber 9. As a result, the temporary fixing roller 20 rotates, and the sidewall rubber 9 is temporarily fixed to the base material 5.

Note that when the temporary fixing roller 20 rotates and presses the sidewall rubber 9, the convex portions 20a press the sidewall rubber 9 and temporarily fix the sidewall rubber 9 to the base material 5, while the concave portions 20b Do not press the sidewall rubber 9. Thereby, the sidewall rubber 9 is temporarily fixed to the base material 5 at intermittent portions in the circumferential direction.

Furthermore, the force that the first force application section 22 applies to the temporary fixing roller 20 is the same as the force that the second force application section 32 (see FIG. 3) applies to the needle roller 30 and the force that the third force application section 42 (see FIG. 3) applies to the needle roller 30. This is smaller than the force applied to the pressure roller 40. As a result, the force with which the temporary fixing roller 20 presses the sidewall rubber 9 is smaller than the force with which the needle roller 30 and the pressure roller 40 press the sidewall rubber 9.

By temporarily fixing the sidewall rubber 9 to the base material 5 in this manner, it is possible to suppress the sidewall rubber 9 from being misaligned with respect to the base material 5 in subsequent steps S30 and S40. Thereby, for example, it is possible to suppress gas from remaining between the sidewall rubber 9 and the base material 5 due to the positional shift.

<Through hole formation step S30>
In the through-hole forming step S30, the needle roller 30 is pressed against the sidewall rubber 9. As a result, the needle roller 30 rotates, so that the needle 30b pierces the sidewall rubber 9 and then comes out. Therefore, a through hole is formed in the sidewall rubber 9 that penetrates in the radial direction.

The force that the second force applying section 32 applies to the needle roller 30 is greater than the force that the first force applying section 22 applies to the temporary fixing roller 20. As a result, the force with which the needle roller 30 presses the sidewall rubber 9 is greater than the force with which the temporary fixing roller 20 presses the sidewall rubber 9. Therefore, for example, through holes can be reliably formed in the sidewall rubber 9.

On the other hand, the force that the second force applying section 32 applies to the needle roller 30 is smaller than the force that the third force applying section 42 applies to the pressure roller 40 . As a result, the force with which the needle roller 30 presses the sidewall rubber 9 is smaller than the force with which the pressure roller 40 presses the sidewall rubber 9. Therefore, for example, it is possible to prevent the needle 30b from penetrating into the base material 5.

Further, the circumferential length W33 (see FIG. 5) between the needles 30b, 30b is appropriately set. This suppresses the density of the through-holes from becoming too large, so even if traces of the through-holes remain in the tire T1 after vulcanization, it is possible to suppress the marks from becoming noticeable. Furthermore, since the density of the through holes is prevented from becoming too small, the number of through holes required in the subsequent step S40 can be secured.

Further, the diameter W34 (see FIG. 5) of the proximal end of the needle 30b is appropriately set. This suppresses the shape of the through hole from becoming too large, so even if a mark of the through hole remains in the tire T1 after vulcanization, it is possible to prevent the mark from becoming noticeable. Moreover, since the shape of the through-hole is prevented from becoming too small, the size of the through-hole required in the subsequent step S40 can be ensured.

Further, the length W35 (see FIG. 5) of the needle 30b is appropriately set. For example, it is preferable that the length W35 of the needle 30b is the same as the thickness of the sidewall rubber 9. According to such a configuration, for example, when the roller main body 30a hits the surface of the sidewall rubber 9, it is possible to suppress the needle 30b from penetrating into the base material 5.

By the way, no through hole is formed in the partial region 9a of the sidewall rubber 9. Specifically, the roller moving mechanism 96 separates the needle roller 30 from the inner end region 9a of the sidewall rubber 9 in the axial direction D1, so that the end region 9a of the sidewall rubber 9 is penetrated. No pores are formed. Note that the temporary fixing roller 20 and the pressure roller 40 are also pressed against the end region 9a of the sidewall rubber 9.

<Crimp step S40>
In the pressing step S40, the pressing roller 40 is pressed against the sidewall rubber 9. As a result, the pressure roller 40 rotates, and the sidewall rubber 9 is pressure-bonded to the base material 5. Furthermore, by pressing the pressure roller 40 against the region of the sidewall rubber 9 in which the through hole is formed, the gas existing between the sidewall rubber 9 and the base material 5 can be discharged from the through hole. can.

The needle roller 30 and the pressure roller 40 are separate rollers. Therefore, after the needle 30b of the needle roller 30 is pulled out from the through hole, the pressure roller 40 is pressed against the area where the through hole is formed, so that, for example, the needle roller 30 and the pressure roller 40 are (for example, a configuration in which the roller body 30a of the needle roller 30 presses the sidewall rubber 9 and the base material 5), the gas present between the sidewall rubber 9 and the base material 5 is It can be efficiently discharged from the through hole.

Furthermore, the force that the third force applying section 42 applies to the pressure roller 40 is greater than the force that the second force applying section 32 applies to the needle roller 30. As a result, the force with which the pressure roller 40 presses the sidewall rubber 9 is greater than the force with which the needle roller 30 presses the sidewall rubber 9. Therefore, the sidewall rubber 9 and the base material 5 can be reliably pressure-bonded, and the gas existing between the sidewall rubber 9 and the base material 5 can be reliably discharged from the through hole.

<Parallel steps S20, S30, and S40>
In the axial direction D1, the width W22 of the temporary fixing roller 20, the width W32 of the needle roller 30, and the width W42 of the pressure roller 40 are each smaller than the width W9 of the sidewall rubber 9. Note that, although not particularly limited, the width W9 of the sidewall rubber 9 in the axial direction D1 may be, for example, 60 mm to 200 mm.

Then, the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 move along the axial direction D1 while being pressed against the sidewall rubber 9. At this time, each roller 20, 30, 40 is moving in the radial direction D2, following the position of the surface of the tire component 10. Thereby, for example, each roller 20, 30, 40 can be pressed against the sidewall rubber 9 with an appropriate force.

Moreover, the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 are lined up in this order from the inside in the axial direction D1, and each roller 20, 30, and 40 moves inward in the axial direction D1. As a result, a predetermined region of the sidewall rubber 9 is pressed by the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 in this order.

Therefore, the predetermined region of the sidewall rubber 9 is subjected to the temporary fixing step S20, the through hole forming step S30, and the crimping step S40 in this order. As a result, the sidewall rubber 9 and the base material 5 can be crimped in order along the axial direction D1, and the gas existing between the sidewall rubber 9 and the base material 5 can be discharged from the through hole. I can do it.

Further, the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 are pressed against the same tire component 10 at the same time. That is, the temporary fixing step S20 using the temporary fixing roller 20, the through hole forming step S30 using the needle roller 30, and the pressing step S40 using the pressing roller 40 are performed on the same tire component 10 in parallel. . This makes it possible to improve the efficiency of tire manufacturing. Therefore, for example, the manufacturing time of the tire T1 can be shortened.

By the way, each roller 20, 30, 40 is moving inward in the axial direction D1. That is, each roller 20, 30, 40 moves from the third region 5c of the base material 5 to the second region 5b and from the second region 5b to the first region 5a while being pressed against the sidewall rubber 9. I'm moving.

As a result, each of the rollers 20, 30, and 40 is moving from the region 5c (5b) located on the outside in the radial direction D2 toward the region 5b (5a) located on the inside in the radial direction D2. Therefore, the gas present between the sidewall rubber 9 and the base material 5 moves from the region 5c (5b) located on the outside in the radial direction to the region 5b (5a) located on the inside in the radial direction D2. Therefore, it is possible to prevent the gas from remaining at the step 5d.

Further, the sidewall rubber 9 is temporarily fixed to the base material 5 at intermittent portions in the circumferential direction by a temporary fixing roller 20 . As a result, when the gas existing between the sidewall rubber 9 and the base material 5 is moved in the axial direction D1 by the pressure roller 40, the gas is transferred to the sidewall rubber 9 which is temporarily fixed to the base material 5. It is possible to move in the axial direction D1 by passing through the portion where the object is not present.

Note that the needle roller 30 and the pressure roller 40 are arranged between the second bearing 35 and the third bearing 44. Specifically, there is no member between the needle roller 30 and the pressure roller 40, and the needle roller 30 and the pressure roller 40 are placed close to each other.

Thereby, for example, as the support body 50 rotates once, each roller 20, 30, 40 moves between the width center of the needle roller 30 (the center in the axial direction D1) and the width center of the pressure roller 40 (the center of the width in the axial direction D1). The center of the axial direction D1) may be moved in the axial direction D1. According to such a configuration, by one rotation of the support body 50, the pressure roller 40 can be pressed against the area where the through hole was formed during the previous rotation.

Moreover, the area to which each roller 20, 30, 40 is pressed is not particularly limited. Note that, for example, the pressure roller 40 is preferably moved in the axial direction D1 and pressed until it reaches the edge of the end region 9a of the sidewall rubber 9. According to such a configuration, gas existing between the sidewall rubber 9 and the base material 5 can be discharged from the edge of the end region 9a of the sidewall rubber 9. Thereby, for example, gas discharge efficiency can be improved.

<Lamination step S50>
FIG. 11 shows a cross-sectional view of the main part of the tire component 10 when the lamination step S50 is completed, that is, a cross-sectional view of the main part of the unvulcanized tire T1 cut along the tire meridian plane. In addition, in FIG. 11, only the tread rubber 13 and the sidewall rubber 9 are shown by hatching. In the lamination step S50, the member 13 constituting the tire T1 is laminated on the sidewall rubber 9 and the like so as to cover a partial region 9a of the sidewall rubber 9.

Specifically, as shown in FIG. 11, the tread rubber 13 and the like are laminated on the sidewall rubber 9 and the like so that the tread rubber 13 covers the end region 9a of the sidewall rubber 9. Note that the lamination step S50 may be performed, for example, after the compression bonding step S40 is completed, with the tire component 10 supported by another support.

By the way, if a through hole exists in the region 9a where the tread rubber 13 is laminated, gas may remain in the through hole. On the other hand, in the through-hole forming step S30, no through-hole is formed in the end region 9a of the sidewall rubber 9. Thereby, since no through holes are present in the region 9a where the tread rubber 13 is laminated, it is possible to suppress the presence of gas between the tread rubber 13 and the sidewall rubber 9 due to the through holes. .

<Vulcanization step S60>
In the vulcanization step S60, the unvulcanized tire T1 is vulcanized. Thereafter, the vulcanized tire T1 is mounted on a rim, and air is further introduced into the tire T1, thereby producing a pneumatic tire T1.

As described above, the pneumatic tire T1 manufacturing apparatus 90 according to the present embodiment has a cylinder in which the base material 5 and the rubber member 9 are wound in this order on the outer peripheral surface 53 of the support body 50 and supported by the support body 50. A needle-equipped roller 30 that is pressed against the rubber member 9 in order to form a through-hole in the rubber member 9 for the tire component 10 having a shape, and the needle-equipped roller 30 are different rollers, and In order to press the base material 5 and the rubber member 9 together, a pressure roller 40 is provided which is pressed against at least a region of the rubber member 9 in which the through hole is formed, and the needle roller 30 and the rubber member 9 are pressed together. The pressure roller 40 is pressed against the tire component 10 at the same time.

The method for manufacturing the pneumatic tire T1 according to the present embodiment is such that the base material 5 and the rubber member 9 are wound in this order on the outer peripheral surface 53 of the support body 50, and the cylindrical tire is supported by the support body 50. S30 forming a through hole passing through the rubber member 9 by pressing a needle roller 30 against the rubber member 9 with respect to the component 10; pressing a pressure roller 40 different from the needle roller 30 onto the area to pressure the base material 5 and the rubber member 9, forming a through hole passing through the rubber member 9; This and press-bonding the base material 5 and the rubber member 9 are performed on the same tire component 10 in parallel.

According to this configuration and method, the pressure roller 40, which is different from the needle roller 30, is pressed against the region of the rubber member 9 in which the through hole is formed, so that the base material 5 and the rubber member 9 are pressed together. At the same time, gas existing between the rubber member 9 and the base material 5 can be discharged from the through hole. For the same tire component 10, forming a through hole that penetrates the rubber member 9 and press-bonding the base material 5 and the rubber member 9 are performed in parallel. This makes manufacturing more efficient.

Furthermore, in the method for manufacturing the pneumatic tire T1 according to the present embodiment, the force with which the pressure roller 40 presses the rubber member 9 is greater than the force with which the needle roller 30 presses the rubber member 9. It's a method.

According to this method, the force with which the pressure roller 40 presses the rubber member 9 is greater than the force with which the needle roller 30 presses the rubber member 9, so that the base material 5 and the rubber member 9 can be reliably pressed together. At the same time, the gas existing between the rubber member 9 and the base material 5 can be reliably discharged from the through hole.

Further, in the method for manufacturing the pneumatic tire T1 according to the present embodiment, in the axial direction D1 of the tire component 10, the width W32 of the needle roller 30 and the width W42 of the pressure roller 40 are respectively set by the rubber member In this method, the needle roller 30 and the pressure roller 40 are moved along the axial direction D1 while pressing the needle roller 30 and the pressure roller 40 against the rubber member 9.

According to this method, the needle roller 30 and the pressure roller 40 move in the axial direction D1 while pressing against the rubber member 9. Thereby, the base material 5 and the rubber member 9 can be crimped in order along the axial direction D1, and the gas existing between the rubber member 9 and the base material 5 can be discharged from the through hole. .

Furthermore, in the method for manufacturing a pneumatic tire T1 according to the present embodiment, the outer peripheral surface of the base material 5 has a step 5d between the first region 5a (5b) and the first region 5a (5b). a second region 5b (5c) located outside the first region 5a (5b) in the radial direction D2; This is a method of moving from the second region 5b (5c) toward the first region 5a (5b) along the axial direction D1 while pressing.

According to this method, the needle roller 30 and the pressure roller 40 move from the second region 5b (5c) toward the first region 5a (5b). As a result, the gas present between the rubber member 9 and the base material 5 moves from the second region 5b (5c) toward the first region 5a (5b), so that the The step 5d between the second region 5b (5c) can prevent the gas from remaining.

In the method for manufacturing the pneumatic tire T1 according to the present embodiment, after S40 of press-bonding the base material 5 and the rubber member 9, a partial region of the rubber member 9 (in the present embodiment) further comprising laminating a member (tread rubber in this embodiment) 13 so as to cover the end region) 9a, and forming a through hole passing through the rubber member 9; A method may also be used in which the through hole is not formed in 9a.

According to this method, although the member 13 is laminated to cover the partial region 9a of the rubber member 9, no through hole is formed in the partial region 9a. Thereby, since no through-hole exists in the region 9a where the member 13 is stacked, it is possible to suppress the presence of gas between the member 13 and the rubber member 9 due to the through-hole.

The method for manufacturing the pneumatic tire T1 according to the present embodiment further includes S20 of temporarily fixing the rubber member 9 to the base material 5 by pressing a temporary fixing roller 20 against the rubber member 9, Temporarily fixing the rubber member 9 to the base material 5 S20, forming a through hole penetrating the rubber member 9 S30, and crimping the base material 5 and the rubber member 9 S40, This method is performed in parallel on the same tire component 10.

According to this method, temporarily fixing the rubber member 9 to the base material 5 S20 includes forming a through hole passing through the rubber member 9 S30, and crimping the base material 5 and the rubber member 9 together S40. These steps are performed on the same tire component 10 in parallel. This makes it possible to improve the efficiency of manufacturing, including temporarily fixing the rubber member 9 to the base material 5 in step S20.

Note that the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to the configuration of the embodiment described above, and are not limited to the effects described above. Moreover, it goes without saying that various changes can be made to the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 without departing from the gist of the present invention. For example, it goes without saying that one or more of the configurations, methods, etc. according to the various modification examples described below may be arbitrarily selected and adopted as the configurations, methods, etc. according to the above-described embodiments.

(1) In the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 are arranged so as to be lined up in the axial direction D1. It is the composition. However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, as shown in FIG. 12, the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 may be arranged so as to be lined up in the circumferential direction.

(2) Furthermore, in the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, the rubber member 9 in which the through holes are formed is the sidewall rubber 9. However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, the rubber member 9 in which the through hole is formed may be a member other than the sidewall rubber 9.

(3) Furthermore, in the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, the force with which the pressure roller 40 presses the rubber member 9 is greater than the force with which the needle roller 30 presses the rubber member 9. The structure is large. However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration.

For example, the force with which the pressure roller 40 presses the rubber member 9 may be smaller than the force with which the needle roller 30 presses the rubber member 9. Specifically, the magnitude relationship between the force of the pressure roller 40 pushing the rubber member 9, the force of the needle roller 30 pushing the rubber member 9, and the force of the temporary fixing roller 20 pushing the rubber member 9 is not particularly limited. .

(4) In addition, in the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, in the axial direction D1 of the tire component 10, the width W22 of the temporary fixing roller 20, the width W32 of the needle roller 30, and The width W42 of the pressure roller 40 is smaller than the width W9 of the rubber member 9. However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, at least one of the width W22 of the temporary fixing roller 20, the width W32 of the needle roller 30, and the width W42 of the pressure roller 40 may be configured to be equal to or larger than the width W9 of the rubber member 9.

(5) In addition, in the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 are pressed against the rubber member 9 in the axial direction D1. The configuration is such that the robot moves along the However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, at least one of the temporary fixing roller 20, the needle roller 30, and the pressure roller 40 may be configured to be pressed against the rubber member 9 without changing its position in the axial direction D1.

(6) Furthermore, in the method and apparatus 90 for manufacturing a pneumatic tire T1 according to the above embodiment, each roller 20, 30, 40 moves from the second region 5b along the axial direction D1 while pressing against the rubber member 9. It is configured to move toward the first region 5a (and from the third region 5c toward the second region 5b). However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, each roller 20, 30, 40 moves from the first region 5a to the second region 5b (and from the second region 5b to the third region 5c) along the axial direction D1 while pressing against the rubber member 9. It may also be possible to move the

(7) In addition, in the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, the part (end region) 9a of the rubber member 9 on which the member (tread rubber) 13 is laminated is penetrated. This is a structure in which no holes are formed. However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, a configuration may be adopted in which a through hole is formed in a partial region (end region) 9a of the rubber member 9 on which the member (tread rubber) 13 is laminated.

(8) Furthermore, the method for manufacturing the pneumatic tire T1 according to the above embodiment includes a temporary fixing step S20, and the manufacturing apparatus includes a temporary fixing roller 20. However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration.

For example, the method for manufacturing the pneumatic tire T1 may not include the temporary fixing step S20, and the manufacturing apparatus may not include the temporary fixing roller 20, for example. In short, the manufacturing method includes the through-hole forming step S30 and the crimping step S40 as essential steps, and the other steps S10, S20, S50, and S60 are not essential steps.

(9) Moreover, in the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 according to the above embodiment, the support body 50 is configured to rotate (rotate). However, the manufacturing method and manufacturing apparatus 90 of the pneumatic tire T1 are not limited to such a configuration. For example, each roller 20, 30, 40 may be configured to rotate (revolution) around the support body 50 in the circumferential direction.

(10) Furthermore, in the method for manufacturing the pneumatic tire T1 according to the above embodiment, the control section 80 is provided, and the movement of each roller 20, 30, 40 is controlled by the control section 80. be. However, the method for manufacturing the pneumatic tire T1 is not limited to this configuration. For example, a method may be adopted in which the control unit 80 is not provided and each roller 20, 30, 40 is moved by a person.

DESCRIPTION OF SYMBOLS 1... Bead part, 1a... Rim strip rubber, 2... Sidewall part, 3... Tread part, 4... Bead member, 5... Base material, 5a... First region, 5b... Second region, 5c... Third region, 5d... Step, 6... Carcass ply, 6a... End area, 6b... Central area, 7... Inner liner, 8... Chafer, 9... Rubber member (sidewall rubber), 9a... End area, 10... Tire component member , 11... Belt, 12... Reinforcement layer, 13... Tread rubber, 20... Temporary fixing roller, 20a... Convex part, 20b... Concave part, 21... First connecting part, 22... First applying part, 23... First fixing 24... First movable part, 25... First bearing, 26... Elastic body, 30... Roller with needle, 30a... Roller main body, 30b... Needle, 31... Second connecting part, 32... Second applying part, 33... Second fixed part, 34... Second movable part, 35... Second bearing, 36... Drive source, 40... Pressure roller, 40a... Central area, 40b... End area, 41... Third connection part, 42... Third force applying part, 43...Third fixed part, 44...Third bearing, 50...Support body, 52...Rotating shaft, 53...Outer peripheral surface, 61...Shaft drive mechanism, 62...Radial drive mechanism, 63...Axis movement Part, 64...First drive source, 65...Transmission unit, 66...Radial moving unit, 67...Second drive source, 80...Control unit, 81...Input unit, 90...Tire manufacturing device, 91...Wrapping device, 92 ... Roller device, 93 ... Roller unit, 94 ... Movement mechanism, 95 ... Base part, 96 ... Roller movement mechanism, C1 ... Tire equatorial plane, T1 ... Tire

Claims (6)

A base material and a rubber member are wound in this order on the outer peripheral surface of a support body, and a needle roller is pressed against the rubber member against a cylindrical tire component supported by the support body, and the rubber member is rolled. forming a penetrating through hole;
Pressing a pressure roller different from the needle roller against at least a region of the rubber member in which the through hole is formed to pressure the base material and the rubber member,
Both the needle roller and the pressure roller are configured to be rotatable around an axis extending in the axial direction of the tire component, and the needle roller and the pressure roller are configured to rotate in the axial direction of the tire component. located in different positions,
In the axial direction of the tire component, the width of the needle roller and the pressure roller are each smaller than the width of the rubber member,
moving the needle roller and the pressure roller along the axial direction while pressing against the rubber member;
Forming a through hole penetrating the rubber member and press-bonding the base material and the rubber member are performed in parallel on the same tire component,
A method for manufacturing a pneumatic tire , wherein the rubber member is a sidewall rubber, and the base material includes a carcass ply . The method for manufacturing a pneumatic tire according to claim 1, wherein the force with which the pressure roller presses the rubber member is greater than the force with which the needle roller presses the rubber member. The outer circumferential surface of the base material includes a first region and a second region located outside the first region in the radial direction so as to have a step between the first region and the first region,
The method for manufacturing a pneumatic tire according to claim 1 , wherein the needle roller and the pressure roller are moved along the axial direction from the second region to the first region while pressing against the rubber member. After pressing the base material and the rubber member, the method further includes laminating members so as to cover a partial area of the rubber member,
The method for manufacturing a pneumatic tire according to any one of claims 1 to 3 , wherein in forming a through hole passing through the rubber member, no through hole is formed in the partial region. further comprising temporarily fixing the rubber member to the base material by pressing a temporary fixing roller against the rubber member,
Temporarily fixing the rubber member to the base material, forming a through hole penetrating the rubber member, and press-bonding the base material and the rubber member are performed on the same tire component. The method for manufacturing a pneumatic tire according to any one of claims 1 to 4 , wherein the method is performed in parallel. A base material and a rubber member are wound in this order on the outer circumferential surface of a support, and the rubber A roller with a needle that is pressed against the member,
a pressure roller that is different from the needle roller and is pressed against at least a region of the rubber member in which the through hole is formed in order to pressure the base material and the rubber member; Prepare,
Both the needle roller and the pressure roller are configured to be rotatable around an axis extending in the axial direction of the tire component, and the needle roller and the pressure roller are configured to rotate in the axial direction of the tire component. located in different positions,
In the axial direction of the tire component, the width of the needle roller and the pressure roller are each smaller than the width of the rubber member,
moving the needle roller and the pressure roller along the axial direction while pressing against the rubber member;
The needle roller and the pressure roller are simultaneously pressed against the tire component ,
A pneumatic tire manufacturing apparatus , wherein the rubber member is a sidewall rubber, and the base material includes a carcass ply .

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