JP5619456B2 - Tire manufacturing method, tire manufacturing apparatus, and tire - Google Patents

Description

  The present invention relates to a tire manufacturing method, a tire manufacturing apparatus, and a tire.

  Conventionally, pneumatic tires made of rubber, organic fiber materials, steel members, and the like are used in vehicles such as passenger cars.

In recent years, from the viewpoint of weight reduction, ease of molding, and ease of recycling, it is required to use a resin material, particularly a thermoplastic material such as a thermoplastic resin or a thermoplastic elastomer, as a tire material.
For example, Patent Document 1 discloses a pneumatic tire formed using a thermoplastic polymer material.

Japanese Patent Laid-Open No. 03-143701

  In the pneumatic tire disclosed in Patent Document 1, a cushion rubber is attached to the outer peripheral surface of an annular tire frame member formed using a thermoplastic polymer material, and a helical cord is wound while a reinforcing cord is embedded in the cushion rubber. A reinforcing layer is formed by turning, and a tread rubber is disposed on the reinforcing layer.

  Here, as a method of embedding the reinforcing cord in the cushion rubber, a method of embedding in the cushion rubber by pressing the reinforcing cord with a roller or the like can be considered.

  However, since the tire skeleton member is a member that becomes the skeleton of the tire, the center portion in the axial direction of the outer peripheral surface is usually flat, and the end side is often curved radially inward, Thus, when the end portion side of the outer peripheral surface is curved inward in the radial direction, the reinforcing cord may not be sufficiently pressed by the roller.

The present invention has been made to solve the above problem, and manufacture of a tire that winds a reinforcing cord member while pressing the reinforcing cord member with an equal pressure against the outer peripheral surface of an annular tire frame member formed using a resin material. It is a first object to provide a method and a tire manufacturing apparatus.
It is a second object to provide a tire that is formed using a resin material and has excellent durability.

The tire manufacturing method according to claim 1 includes: a skeleton forming step of forming an annular tire skeleton member having a smaller outer diameter on the end side than the central portion in the axial direction using a resin material; and an outer peripheral surface of the tire skeleton member. A reinforcing layer forming step of forming a reinforcing layer on the outer peripheral surface by wrapping the reinforcing cord member around the central portion and the end portion of the pressing portion with a pressing member, and the pressing member has a different pressing direction. It is constituted by a plurality of pressing rollers, and in the reinforcing layer forming step, one selected from the plurality of pressing rollers according to the direction of the outer peripheral surface in the axial sectional view of the tire frame member, and the selected pressing The pressing direction of the pressing member is changed by pressing the reinforcing cord member with a roller .
The tire manufacturing method according to claim 2 includes: a skeleton forming step of forming an annular tire skeleton member having a smaller outer diameter on the end side than an axial center portion using a resin material; and an outer peripheral surface of the tire skeleton member. A reinforcing layer forming step of forming a reinforcing layer on the outer peripheral surface by wrapping the reinforcing cord member while pressing the reinforcing cord member to the center portion and the end portion side by a pressing member, and forming the tire frame member Is a thermoplastic material having thermoplasticity, and the reinforcing cord member is configured by covering the reinforcing cord with a covering thermoplastic material, and in the reinforcing layer forming step, the tire frame member in an axial sectional view The pressing direction of the pressing member is changed according to the direction of the outer peripheral surface, and the reinforcing layer forming step includes the thermoplastic material for covering the reinforcing cord member and the auxiliary of the tire frame member. And heating at least one of the thermoplastic material of the part code member is disposed comprises a heat treatment to a molten or softened state, is welded to said reinforcing cord member and the outer peripheral surface.

According to the tire manufacturing method of the first and second aspects, an annular tire frame member having a smaller outer diameter on the end side than the central portion in the axial direction is formed using a resin material. Then, the reinforcing cord member is wound around the outer peripheral surface of the tire frame member while being pressed by the pressing member to form a reinforcing layer on the outer peripheral surface.

Here, in the reinforcing layer forming step, the pressing direction of the pressing member is changed in accordance with the direction of the outer circumferential surface of the tire skeleton member in the axial cross-sectional view. Accordingly, the reinforcing cord member can be wound around the outer peripheral surface of the tire frame member while pressing with a uniform pressure as compared with the case where the pressing direction of the pressing member is not changed.
According to the tire manufacturing method of claim 1, one of the plurality of pressing rollers is selected according to the direction of the outer peripheral surface in the axial sectional view of the tire frame member, and the reinforcing cord is selected by the selected pressing roller. The member is pressed. Accordingly, the reinforcing cord member can be wound around the outer peripheral surface of the tire frame member while pressing with a uniform pressure with a simple configuration in which a plurality of pressing rollers having different pressing directions are used.
On the other hand, according to the method for manufacturing a tire of claim 2, at least a thermoplastic material for covering that constitutes the reinforcing cord member and a thermoplastic material in a portion where the reinforcing cord member of the tire frame member is disposed by heat treatment. One is heated to a molten or softened state. In this state, the reinforcing cord member is disposed on the outer peripheral surface, whereby the reinforcing cord member and the outer peripheral surface are welded, and the tire frame member and the reinforcing layer are firmly joined.

  As the resin material, a thermosetting resin, a thermoplastic resin, a thermoplastic elastomer (TPE), or the like can be used.

Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, epoxy resin, and polyamide resin.
Examples of the thermoplastic resin include urethane resin, olefin resin, vinyl chloride resin, and polyamide resin.

Examples of the thermoplastic elastomer include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (TPS) specified in JIS K6418, Examples thereof include urethane-based thermoplastic elastomer (TPU), crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ).
As the resin material, it is preferable to use a thermoplastic elastomer in consideration of elasticity at the time of running, moldability at the time of manufacture, and the like.

The tire manufacturing method according to claim 3 is the tire manufacturing method according to claim 1 or 2 , wherein at least a part of the outer peripheral surface is curved radially inward, and the reinforcing layer forming step includes the outer peripheral surface. In the curved portion, the pressing direction of the pressing member is changed according to the normal direction of the curved portion.

According to the tire manufacturing method of the third aspect, in the curved portion of the outer peripheral surface of the tire frame member, the pressing direction of the pressing member changes according to the normal direction of the curved portion. Thereby, even if the outer peripheral surface of the tire frame member is curved, the reinforcing cord member can be wound around the outer peripheral surface of the tire frame member while being pressed with an equal pressure.

A tire manufacturing method according to a fourth aspect is the tire manufacturing method according to the third aspect, wherein the pressing direction of the pressing member is along the normal direction of the curved portion in the curved portion of the outer peripheral surface.

According to the tire manufacturing method of the fourth aspect, in the curved portion of the outer peripheral surface of the tire skeleton member, the pressing direction of the pressing member is along the normal direction of the curved portion, so that it is most effective for the curved portion. The reinforcing cord member can be wound around while being pressed.

The tire manufacturing method according to claim 5 is the tire manufacturing method according to claim 2 , wherein the pressing member includes a plurality of pressing rollers having different pressing directions, and the reinforcing layer forming step includes a shaft of the tire frame member. One of the plurality of pressing rollers is selected according to the direction of the outer peripheral surface in a sectional view, and the reinforcing cord member is pressed by the selected pressing roller.

According to the tire manufacturing method of claim 5 , one of the plurality of pressing rollers is selected according to the direction of the outer peripheral surface in the axial sectional view of the tire frame member, and the reinforcing cord member is selected by the selected pressing roller. Pressed. Accordingly, the reinforcing cord member can be wound around the outer peripheral surface of the tire frame member while pressing with a uniform pressure with a simple configuration in which a plurality of pressing rollers having different pressing directions are used.

The tire manufacturing method according to claim 6 is the tire manufacturing method according to claim 2 , wherein the pressing member is a single pressing roller, and in the reinforcing layer forming step, in the axial sectional view of the tire frame member. The axis of the tire frame member is inclined according to the direction of the outer peripheral surface, and the reinforcing cord member is pressed by the pressing roller.

According to the tire manufacturing method of claim 6 , the axis of the tire skeleton member is inclined according to the direction of the outer peripheral surface of the tire skeleton member in the axial cross-sectional view of the tire skeleton member, and in this state, the reinforcing cord member is Pressed. Thereby, the configuration of the pressing roller can be simplified, and further, the reinforcing cord member can be wound around the outer peripheral surface of the tire frame member while being pressed with an equal pressure.

A tire manufacturing method according to a seventh aspect is the tire manufacturing method according to the second aspect , wherein the pressing member changes an angle of a rotating shaft according to a direction of the outer peripheral surface in an axial sectional view of the tire frame member. In the reinforcing layer forming step, the pressing roller presses the reinforcing cord member by changing the angle of the rotation shaft according to the direction of the outer peripheral surface in the axial sectional view of the tire frame member.

According to the tire manufacturing method of claim 7 , the angle of the rotating shaft of the pressure roller changes according to the direction of the outer peripheral surface of the tire frame member in the axial cross-sectional view of the tire frame member, and the reinforcing cord member is changed by the pressure roller. Is pressed. Thereby, it can wind, pressing a reinforcement cord member with an equal pressure with respect to the outer peripheral surface of a tire frame member.

The tire manufacturing method according to claim 8 is the tire manufacturing method according to any one of claims 1 and 5 to 7 , wherein the reinforcing roller is provided on the outer peripheral surface of the pressing roller along the outer peripheral surface. A groove portion into which at least a part of the cord member can be inserted is formed.

According to the tire manufacturing method of claim 8 , the reinforcing cord member is wound while pressing the reinforcing cord member around the outer peripheral surface of the tire frame member in a state where at least a part of the reinforcing cord member is inserted into the groove portion of the pressing roller. The meandering arrangement of the members can be suppressed.

The tire manufacturing method according to claim 9 is the tire manufacturing method according to claim 1 , wherein the resin material forming the tire frame member is a thermoplastic material having thermoplasticity, and the reinforcing cord member is a reinforcing cord. The reinforcing layer forming step includes coating the thermoplastic material for coating the reinforcing cord member and the thermoplastic material of the portion of the tire frame member where the reinforcing cord member is disposed. And heat-treating at least one of the molten metal into a molten or softened state, and welding the outer peripheral surface and the reinforcing cord member.

According to the tire manufacturing method of claim 9 , at least one of the covering thermoplastic material constituting the reinforcing cord member and the portion of the thermoplastic material of the tire skeleton member where the reinforcing cord member is disposed is formed by heat treatment. It is heated to a molten or softened state. In this state, the reinforcing cord member is disposed on the outer peripheral surface, whereby the reinforcing cord member and the outer peripheral surface are welded, and the tire frame member and the reinforcing layer are firmly joined.

The tire manufacturing method according to claim 10 is the tire manufacturing method according to any one of claims 1 to 9 , wherein the reinforcing layer forming step is a cooling process for cooling the reinforcing cord member disposed on the outer peripheral surface. Is included.

According to the tire manufacturing method of claim 10 , at least one of the covering thermoplastic material constituting the reinforcing cord member and the portion of the tire frame member where the reinforcing cord member is disposed is heated. After the reinforcing cord member and the outer peripheral surface are welded in a molten or softened state, the reinforcing cord member is cooled by a cooling process, so that the melted or softened portion is solidified before being deformed by receiving external force. Can be made.

The tire manufacturing method according to claim 11 is the tire manufacturing method according to claim 10 , wherein, in the cooling process, cooling is performed by changing an angle of a rotation shaft in accordance with a direction of the outer peripheral surface in an axial section of the tire frame member. A roller is brought into contact with the reinforcing cord member to cool the reinforcing cord member.

According to the tire manufacturing method of the eleventh aspect, the angle of the rotating shaft of the cooling roller changes according to the direction of the outer peripheral surface of the tire frame member in the axial cross-sectional view, and the reinforcing cord member comes into contact with the cooling roller. To be cooled. Here, since the angle of the rotation axis of the cooling roller is changed according to the direction of the outer peripheral surface in the axial cross-sectional view of the tire frame member, for example, the reinforcement is compared with the case where the angle of the rotation axis of the cooling roller is not changed. Since the contact area between the cord member and the cooling roller can be secured, the melted or softened portion can be effectively cooled.

The tire manufacturing apparatus according to claim 12 is formed by using a resin material and has an outer peripheral surface of an annular tire skeleton member having an outer diameter smaller than an axial central portion toward the central portion and the end portion. A tire manufacturing apparatus that winds a reinforcing cord member while pressing the reinforcing cord member, the pressing member pressing the reinforcing cord member against the outer peripheral surface, and the direction of the outer peripheral surface in an axial sectional view of the tire skeleton member Pressing direction variable means for changing the pressing direction of the pressing member, and the pressing member is constituted by a plurality of pressing rollers having different pressing directions, and the pressing direction changing means is one of the plurality of pressing rollers. The pressing direction of the pressing member is changed by pressing the reinforcing cord member with the selected pressing roller .

According to the tire manufacturing apparatus of claim 12 , since the pressing direction of the reinforcing cord member by the pressing member is changed by the pressing direction variable means according to the direction of the outer peripheral surface in the axial sectional view of the tire skeleton member, for example, Compared with the case where the pressing direction of the pressing member is not changed in accordance with the direction of the outer peripheral surface of the tire frame member in the axial cross-sectional view of the tire frame member, the pressure of the reinforcing cord member is equal to the outer peripheral surface of the tire frame member It can be wound while pressing.

A tire manufacturing apparatus according to a thirteenth aspect is the tire manufacturing apparatus according to the twelfth aspect , further comprising a base that moves along an axial direction of the tire frame member, wherein the plurality of pressing rollers are respectively cylinder apparatuses. The cylinder device is mounted side by side in the axial direction of the tire frame member, and the cylinder device moves the pressing roller in a direction contacting and separating from the outer peripheral surface of the tire frame member, and the pressing unit positioned at the center of the base The roller has a rotating shaft along the horizontal direction, and the pressing roller positioned on one side of the base with respect to the pressing roller positioned at the center has the rotating shaft inclined toward the horizontal direction and positioned at the center. The pressure roller positioned on the other side of the base with respect to the roller has a rotation axis opposite to the rotation axis of the pressure roller positioned on one side of the base and Is inclined with respect to the horizontal direction, the tire manufacturing apparatus according to claim 12.

The tire according to claim 14 is formed using a resin material, and is disposed on an annular tire skeleton member having an outer diameter smaller on the end side than an axial center portion, and an outer peripheral surface of the tire skeleton member, A reinforcing layer formed by winding a reinforcing cord member around the central portion and the end portion of the outer peripheral surface;
And at least a part of the reinforcing cord member is embedded in the outer peripheral surface in a sectional view in the axial direction of the tire frame member .
The tire of claim 15 is formed using a resin material, and is disposed on an outer peripheral surface of the tire frame member, an annular tire frame member having a smaller outer diameter on the end side than the center part in the axial direction, A reinforcing layer formed by winding a reinforcing cord member around the central portion and the end portion of the outer peripheral surface, and the reinforcing cord member is a resin material separate from the resin material forming the tire frame member And a thermoplastic material in which at least one of the resin material that forms the tire frame member and the resin material that forms the reinforcing cord member is thermoplastic. The tire frame member and the reinforcing cord member are welded together.

According to the tire of Claim 14 and Claim 15 , since the reinforcement layer is arrange | positioned on the outer peripheral surface of the tire frame member formed using the resin material, compared with the thing which is not provided with the said reinforcement layer. Further, puncture resistance and cut resistance are improved. In particular, since the reinforcing layer is formed on the center part and the end part side of the tire frame member, the outer peripheral part of the tire frame member is reinforced over a wide range, and puncture resistance and cut resistance are further improved.

Further, since the reinforcing cord member is wound around the outer peripheral surface of the tire frame member and the reinforcing layer is formed, the circumferential rigidity of the tire is improved. By improving the rigidity in the circumferential direction, the creep of the tire frame member formed of a resin material (a phenomenon in which the plastic deformation of the tire frame member increases with time under a certain stress) is suppressed, and from the inner side in the tire radial direction The pressure resistance against air pressure is improved.
From the above, the tires according to claims 14 and 15 are excellent in durability as compared with those in which the reinforcing layer is not provided at the center part and the end part side of the tire frame member.
According to the tire of the fourteenth aspect, in the axial cross-sectional view of the tire frame member, at least a part of the reinforcing cord member is embedded in the outer peripheral surface of the tire frame member formed using a resin material. The movement of the reinforcing cord member due to time input or the like is suppressed. Here, when a tire constituent member such as a tread is disposed on the outer peripheral side of the reinforcing layer, since the movement of the reinforcing cord member is suppressed, peeling or the like is caused between these members (the tire frame member and the tire constituent member). It is suppressed from occurring.
According to the tire of the fifteenth aspect, the reinforcing cord member is configured by covering the covering cord with a resin material separate from the resin material forming the tire skeleton member, and the reinforcing cord member is formed on the outer periphery of the tire skeleton member. Because it is bonded to the surface, for example, the reinforcement cord is prevented from entering the periphery of the reinforcement cord as compared to the case where the reinforcement cord is not covered with the above-mentioned separate resin material and is directly bonded to the outer peripheral surface of the tire frame member. Thus, the movement of the reinforcing cord due to input during traveling is suppressed.
Furthermore, according to the tire of the fifteenth aspect, since the tire frame member and the reinforcing cord member are bonded by welding, the bonding strength between the tire frame member and the reinforcing cord member is excellent.

A tire according to a sixteenth aspect is the tire according to the fifteenth aspect, wherein at least a part of the reinforcing cord member is embedded in the outer peripheral surface in a cross-sectional view of the tire frame member in the axial direction.

According to the tire of the sixteenth aspect , in the axial cross-sectional view of the tire frame member, at least a part of the reinforcing cord member is embedded in the outer peripheral surface of the tire frame member formed using the resin material. The movement of the reinforcing cord member due to time input or the like is suppressed.
Here, when a tire constituent member such as a tread is disposed on the outer peripheral side of the reinforcing layer, since the movement of the reinforcing cord member is suppressed, peeling or the like is caused between these members (the tire frame member and the tire constituent member). It is suppressed from occurring.

The tire according to claim 17 is the tire according to claim 14 , wherein the reinforcing cord member is formed by covering the reinforcing cord with a resin material separate from the resin material forming the tire frame member, and the outer peripheral surface. It is joined to.

According to the tire of claim 17 , the reinforcing cord member is configured by covering the covering cord with a resin material separate from the resin material forming the tire skeleton member, and the reinforcing cord member is formed on the outer peripheral surface of the tire skeleton member. Because it is joined, for example, compared to what is directly joined to the outer peripheral surface of the tire frame member without covering the reinforcement cord with the above-described separate resin material, the entry of air around the reinforcement cord is suppressed, The movement of the reinforcing cord due to input during driving is suppressed.

The tire according to claim 18 is the tire according to claim 17 , wherein at least one of a resin material forming the tire frame member and a resin material forming the reinforcing cord member is a thermoplastic material having thermoplasticity, The tire frame member and the reinforcing cord member are welded.

According to the tire of the eighteenth aspect , since the tire frame member and the reinforcing cord member are bonded by welding, the bonding strength between the tire frame member and the reinforcing cord member is excellent.

As described above, since the tire manufacturing method and the tire manufacturing apparatus of the present invention have the above-described configuration, the reinforcing cord member is applied to the outer peripheral surface of the tire frame member formed using a resin material with an equal pressure. It can be wound while pressing.
Moreover, since the tire of the present invention has the above-described configuration, it is formed of a resin material and has excellent durability.

(A) is a width direction sectional view of a tire of a 1st embodiment. (B) is an enlarged view of a cross section in the width direction of a bead portion in a state where a rim is fitted to the tire of the first embodiment. It is a width direction sectional view showing the circumference of the reinforcement layer of the tire of a 1st embodiment. It is a perspective view of a molding machine. (A) is a perspective view which shows the state where the protrusion amount of the cylinder rod of the tire support part of a molding machine is the smallest. (B) is a perspective view showing a state in which the protruding amount of the cylinder rod of the tire support portion of the molding machine is the largest. It is a perspective view of the extruder for demonstrating the operation | movement which adheres the thermoplastic material for welding to the junction part of a case division body using an extruder. It is explanatory drawing for demonstrating the operation | movement which forms a reinforcement layer in the outer peripheral surface of a tire case using a reinforcement layer forming machine. It is explanatory drawing for demonstrating the operation | movement which presses the reinforcement cord member which heated the lower surface side to the outer peripheral surface of a tire case, and is cooled with a cooling roller after that. It is sectional drawing of the width direction of a tire case which shows the relationship between a tire case and a press roller. It is sectional drawing of the width direction of a tire case which shows the state which is pressing the reinforcement cord member on one curved part of the outer peripheral surface of a tire case. FIG. 3 is a cross-sectional view in the width direction of the tire case showing a state in which a reinforcing cord member is pressed against a central portion of one curved portion of the outer peripheral surface of the tire case. It is sectional drawing of the width direction of a tire case which shows the state which is pressing the reinforcement cord member on the flat part of the outer peripheral surface of a tire case. FIG. 6 is a cross-sectional view in the width direction of the tire case showing a state in which the reinforcing cord member is pressed against the central portion of the other curved portion of the outer peripheral surface of the tire case. It is sectional drawing of the width direction of a tire case which shows the state which is pressing the reinforcement cord member on the other curved part of the outer peripheral surface of a tire case. It is a front view which shows the press roller of a modification. It is a side view of the molding machine of 2nd Embodiment. It is a side view of the molding machine which shows the state which inclined the axis | shaft of the molding machine of 2nd Embodiment to the one side with respect to the horizontal direction. It is a side view of the molding machine which shows the state which inclined the axis | shaft of the molding machine of 2nd Embodiment to the other side with respect to the horizontal direction. FIG. 3 is a cross-sectional view in the width direction of the tire case showing a state in which the axis of the molding machine is tilted to one side with respect to the horizontal direction and the reinforcing cord member is pressed against one curved portion of the outer peripheral surface of the tire case by a pressing roller. FIG. 3 is a cross-sectional view in the width direction of the tire case showing a state in which the axis of the molding machine is inclined to the other side with respect to the horizontal direction and the reinforcing cord member is pressed by the pressing roller to the other curved portion of the outer peripheral surface of the tire case. (A) is a partially broken front view of the press part of 3rd Embodiment. (B) is a partially broken side view of the pressing portion of the third embodiment. (C) is a front view of a pressing portion in which a pressing roller is rotated to one side in a direction orthogonal to the rotation axis. (D) is a front view of the pressing part which rotated the pressing roller to the other side of the direction orthogonal to a rotating shaft. It is an axial direction sectional view of the tire case which shows the state where the reinforcement cord member is pressed to one curved part of the peripheral surface of a tire case with a press roller. It is an axial direction sectional view of the tire case which shows the state where the reinforcement cord member is pressed to the other curved part of the outer peripheral surface of a tire case with a pressure roller. (A) is a partially broken front view of the modification of the press part of 3rd Embodiment. (B) is a partially broken side view of a modification of the pressing portion of the third embodiment. (C) is a front view of a pressing portion in which a pressing roller is rotated to one side in a direction orthogonal to the rotation axis. It is a front view which shows the press roller of other embodiment. It is width direction sectional drawing of the tire which has the coating layer of other embodiment. It is width direction sectional drawing of the tube type tire of other embodiment. It is sectional drawing of the width direction of the tire which all the outer peripheral surfaces of other embodiment are curving. It is the partially expanded view of the cross section of the width direction of the tire case which shows the state which embeds the heated reinforcement cord on the peripheral surface of a tire case using a press roller.

[First Embodiment]
Hereinafter, a tire manufacturing method, a tire manufacturing apparatus, and a tire according to a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1A, a tire 10 manufactured by the tire manufacturing method of the present embodiment has a cross-sectional shape substantially the same as a conventional general rubber pneumatic tire. In the following description, the term “width direction” refers to the width direction of the tire case 17 and the tire 10 (arrow W direction), and the term “circumferential direction” refers to the tire case 17 and the tire 10. Refers to the circumferential direction. The width direction indicates the same direction as the axial direction of the tire case 17 and the tire 10.

  As shown in FIG. 1 (A), the tire 10 has a pair of bead portions 12 (see FIG. 1 (B)) that contact the bead seat 21 and the rim flange 22 of the rim 20, and outward from the bead portion 12 in the tire radial direction. An annular tire case 17 (an example of a tire skeleton member) including a side portion 14 that extends and a crown portion 16 that connects an outer end in the tire radial direction of one side portion 14 and an outer end in the tire radial direction of the other side portion 14 I have.

  The tire case 17 is formed using a resin material, and has an outer diameter that is smaller on the end side than the central portion in the width direction. More specifically, as shown in FIG. 1 (A), the outer peripheral surface 17S of the tire case 17 is a flat portion 17F whose central portion is along the width direction, and the end portion side is the tire from both ends of the flat portion 17F. The curved portion 17R is curved inward in the radial direction.

  Although the tire case 17 of the present embodiment is formed of a single resin material, the present invention is not limited to this configuration, and each part of the tire case 17 is similar to a conventional general rubber pneumatic tire. You may use the resin material which has a different characteristic for every (bead part 12, side part 14, crown part 16, etc.).

  Further, a reinforcing material (polymer material, metal fiber, cord, nonwoven fabric, woven fabric, etc.) is embedded in the tire case 17 (for example, the bead portion 12, the side portion 14, the crown portion 16 and the like), and the reinforcing material is provided. The tire case 17 may be reinforced.

  As the resin material, a thermosetting resin, a thermoplastic resin, a thermoplastic elastomer (TPE), or the like can be used. The resin material does not include vulcanized rubber.

  Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, epoxy resin, and polyamide resin.

  Examples of the thermoplastic resin include urethane resin, olefin resin, vinyl chloride resin, and polyamide resin.

Examples of the thermoplastic elastomer include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (TPS) specified in JIS K6418, Examples thereof include urethane-based thermoplastic elastomer (TPU), crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ). Note that it is preferable to use a thermoplastic elastomer in consideration of elasticity required at the time of traveling, moldability at the time of manufacture, and the like.
Moreover, the same kind of resin material refers to forms, such as ester systems and styrene systems.

  As these resin materials, for example, the deflection temperature under load specified at ISO 75-2 or ASTM D648 (at the time of 0.45 MPa load) is 78 ° C or higher, the tensile yield strength specified by JIS K7113 is 10 MPa or higher, Tensile yield elongation specified in JIS K7113 is 10% or more, Tensile breaking elongation specified in JIS K7113 (JIS K7113) is 50% or more, and Vicat softening temperature (Method A) specified in JIS K7206 is 130 ° C. The above can be used.

  An annular bead core 18 made of a steel cord is embedded in the bead portion 12 of the present embodiment, similar to a conventional general pneumatic tire. However, the present invention is not limited to this configuration, and the bead core 18 may be formed of an organic fiber cord, a resin-coated organic fiber cord, or a hard resin in addition to the steel cord. Further, if the rigidity of the bead portion 12 is ensured and there is no problem in fitting with the rim 20, the bead core 18 may be omitted (see, for example, FIG. 26).

  In addition, as shown in FIG. 1B, in this embodiment, the resin material that forms the tire case 17 in the contact portion of the bead portion 12 with the rim 20 and at least the contact portion of the rim 20 with the rim flange 22 is used. An annular seal layer 24 made of a soft material that is soft is formed. This seal layer 24 may also be formed in a portion that contacts the bead sheet 21.

  As the soft material for forming the seal layer 24, rubber as an example of an elastic body is preferable, and in particular, the same type of rubber as that used on the outer surface of the bead portion of a conventional general rubber pneumatic tire is used. preferable. Note that the sealing layer 24 may be omitted if the sealing property (airtightness) between the tire case 17 and the rim 20 can be secured with only the resin material. Further, as the soft material, another type of resin material softer than the resin material forming the tire case 17 may be used.

  As shown in FIGS. 1A and 2, a reinforcing layer 28 formed by winding a reinforcing cord member 26 in the circumferential direction around the outer peripheral surface 17 </ b> S of the tire case 17 (the outer peripheral surface of the reinforcing layer 28 in FIG. 2). Are indicated by broken lines). More specifically, as shown in FIG. 1A, the reinforcing layer 28 is disposed on the flat portion 17F and the curved portion 17R of the outer peripheral surface 17S, and the distance between the outer peripheral surface and the outer peripheral surface 17S of the tire case 17 is set. It is substantially constant (that is, the thickness is constant).

  The reinforcing cord member 26 is formed by covering a reinforcing cord 26A having higher rigidity than the resin material forming the tire case 17 with a coating resin material 27 separate from the resin material forming the tire case 17. . The reinforcing cord member 26 is joined to the tire case 17.

  The Young's modulus of the coating resin material 27 is preferably set in the range of 0.1 to 10 times the Young's modulus of the resin material forming the tire case 17. This is because when the Young's modulus is 10 times or less, there is no problem in the rim assembling property, but when it exceeds 11 times, the crown portion 16 becomes hard and rim assembling becomes difficult. On the other hand, if the Young's modulus is 0.1 times or less, it is too soft and the in-plane shear rigidity by the reinforcing layer 28 is reduced, resulting in a reduction in cornering force.

  In the present embodiment, the coating resin material 27 is a thermoplastic material (for example, a thermoplastic resin, a thermoplastic elastomer, or the like) among the resin materials.

  The reinforcing cord 26A may be a monofilament (single wire) such as a metal fiber or an organic fiber, or a multifilament (twisted wire) obtained by twisting these fibers. The reinforcing layer 28 corresponds to a belt disposed on the outer peripheral surface of the carcass of a conventional rubber pneumatic tire.

  Further, as shown in FIG. 2, the reinforcing cord member 26 has a trapezoidal cross-sectional shape. In the following, the upper surface (surface on the outer side in the tire radial direction) of the reinforcing cord member 26 is indicated by reference numeral 26U, and the lower surface (surface on the inner side in the tire radial direction) disposed on the outer peripheral surface of the tire case 17 is indicated by reference numeral 26D. .

  As shown in FIG. 1, a cushion rubber 29 is disposed outside the reinforcing layer 28 in the tire radial direction. The cushion rubber 29 covers the reinforcing layer 28.

  A tread 30 is disposed on the outer side of the cushion rubber 29 in the tire radial direction. The tread 30 covers the cushion rubber 29. Further, the tread 30 is made of a material superior in wear resistance to the resin material forming the tire case 17, for example, rubber.

  The rubber used in the tread 30 is preferably the same type of rubber as that used in conventional rubber pneumatic tires. Instead of the tread 30, a tread formed of another type of resin material that is more excellent in wear resistance than the resin material forming the tire case 17 may be used. The tread 30 is formed with a tread pattern (not shown) including a plurality of grooves on the ground contact surface with the road surface in the same manner as a conventional rubber pneumatic tire.

(Tire manufacturing equipment)
Next, the tire manufacturing apparatus of this embodiment will be described.
FIG. 3 is a perspective view showing a main part of the molding machine 32 used when forming the tire 10. The molding machine 32 includes a shaft 36 disposed horizontally, a geared motor 37 that rotates the shaft 36, and a pedestal 34 that is grounded to support the geared motor 37.

  A tire support portion 40 for supporting the tire case 17 formed using a resin material is provided on the end portion side of the shaft 36. The tire support portion 40 includes a cylinder block 38 fixed to a shaft 36, and a plurality of cylinder rods 41 extending radially outward are provided at equal intervals in the circumferential direction.

  A tire support piece 42 having an arcuate curved surface 42 </ b> A whose outer surface is set substantially equal to the radius of curvature of the inner surface of the tire case 17 is provided at the tip of the cylinder rod 41. 3 and 4A show a state where the protruding amount of the cylinder rod 41 is the smallest, and FIG. 4B shows a state where the protruding amount of the cylinder rod 41 is the largest. Each cylinder rod 41 can project the same amount in the same direction in conjunction with each other.

  As shown in FIG. 5, when the tire case 17 is divided into a plurality of parts and formed in the vicinity of the molding machine 32, an extruder 44 that extrudes the thermoplastic material for welding used to integrate these divided bodies. (In the present embodiment, the tire case 17 is formed by welding and integrating the left and right case split bodies 17A).

  The extruder 44 has a nozzle 46 for discharging the molten thermoplastic material 53 for welding downward. The outlet portion of the nozzle 46 has a substantially rectangular shape, and discharges a belt-shaped welding thermoplastic material 53 having a substantially rectangular cross-sectional shape.

  Further, in the vicinity of the nozzle 46, the leveling roller 48 for pressing and leveling the welding thermoplastic material 53 attached to the case divided body 17 </ b> A of the tire case 17, and the leveling roller 48 against the tire case 17 are provided. A cylinder device 50 that moves in the direction of contact and separation is disposed. The cylinder device 50 is supported on the support column 52 of the extruder 44 through a frame (not shown). The extruder 44 is movable in a direction parallel to the shaft 36 of the molding machine 32 along a guide rail 54 disposed on the floor surface.

  Further, a reinforcing layer forming machine 56 for forming the reinforcing layer 28 on the outer peripheral surface 17S of the tire case 17 is mounted on the guide rail 54 so as to be movable along the guide rail 54.

  As shown in FIGS. 6 and 7, the reinforcing layer forming machine 56 supplies the reinforcing cord member 26 to the outer peripheral surface 17S of the tire case 17 that rotates in the direction of arrow R as the shaft 36 of the molding machine 32 rotates. A supply unit 58; a cord heating unit 62 that heats the reinforcing cord member 26 that is supplied from the cord supply unit 58 to the outer peripheral surface 17S; and a pressing unit 68 that presses the reinforcing cord member 26 disposed on the outer peripheral surface 17S; And a cooling unit 72 that cools the reinforcing cord member 26 pressed by the pressing unit 68.

  As shown in FIG. 6, the cord supply unit 58 includes a reel (not shown) around which the reinforcing cord member 26 is wound, and a box that is disposed downstream of the reel in the cord conveying direction and through which the reinforcing cord member 26 passes. 59. The reinforcing cord member 26 is formed by covering the reinforcing cord 26A with the covering resin material 27, and has a substantially trapezoidal cross-sectional shape.

The box 59 has a discharge port 60 through which the reinforcing cord member 26 is discharged. The shape of the discharge port 60 is substantially the same as that of the reinforcing cord member 26. The reinforcing cord member 26 discharged from the discharge port 60 has a lower surface 26D that faces the outer peripheral surface 17S.
In this embodiment, the reinforcing cord member 26 wound around the reel is unwound and supplied. However, the present invention is not limited to this configuration, and the reinforcing cord member 26 housed in a box or the like is pulled out. It is good also as a structure supplied.

  As shown in FIGS. 6 and 7, the cord heating section 62 heats the lower surface 26D of the reinforcing cord member 26 discharged from the outlet 60 of the box 59, and the covering resin on the lower surface 26D side of the reinforcing cord member 26 The material 27 is brought into a molten or softened state. Specifically, the cord heating unit 62 is generated by the heating box 63, the heater 64 and the fan 65 that are arranged inside the heating box 63 and generates hot air, and the heater 64 and the fan 65 provided in the heating box 63. An outlet 66 for blowing the hot air to the lower surface 26D side of the reinforcing cord member 26, and the coating resin material 27 on the lower surface 26D side of the reinforcing cord member 26 discharged from the discharge port 60 is heated by hot air. To do.

  As the cord heating unit 62, for example, a device that emits infrared rays or radiant heat may be used as long as the lower surface 26D side of the reinforcing cord member 26 can be heated to be melted or softened.

  As shown in FIGS. 6 to 8, the pressing portion 68 includes a plurality of pressing rollers 69 </ b> A to 69 </ b> E (five in this embodiment) that press the reinforcing cord member 26 toward the outer peripheral surface 17 </ b> S of the tire case 17, and each pressing. Cylinder devices 70A to 70E that move the rollers 69A to 69E in a direction in which the rollers 69A to 69E move toward and away from the outer peripheral surface 17S side. Each of the pressing rollers 69A to 69E is rotatably supported by U-shaped support members, and these U-shaped support members are connected to the cylinder devices 70A to 70E. Further, the pressing rollers 69 </ b> A to 69 </ b> E are driven to rotate with respect to the rotation direction of the tire case 17 in a state where the pressing rollers 69 </ b> A to 69 </ b> E are in contact with the outer peripheral surface 17 </ b> S of the tire case 17. In addition, in FIG. 6, the state which is pressing the reinforcement cord member 26 with the press roller 69C is shown as an example.

  As shown in FIG. 8, the cylinder devices 70 </ b> A to 70 </ b> E are fixed side by side to the base 78. As described above, the pressure rollers 69A to 69E are connected to the cylinder devices 70A to 70E via the U-shaped support members, respectively.

  As shown in FIG. 8, among the pressure rollers 69 </ b> A to 69 </ b> E, the pressure roller 69 </ b> C located at the center has a roller rotation axis along the horizontal direction. More specifically, it is arranged in parallel with the shaft 36 of the molding machine 32.

  In the pressing rollers 69A and 69B on one side of the pressing roller 69C, the roller rotation shaft is inclined with respect to the horizontal direction. More specifically, it is inclined with respect to the shaft 36 of the molding machine 32. Note that the pressure roller 69A has a larger inclination angle with respect to the shaft 36 than the pressure roller 69B.

  The pressure rollers 69D and 69E on the other side of the pressure roller 69C have a roller rotation axis inclined with respect to the horizontal direction. More specifically, it is inclined with respect to the shaft 36 of the molding machine 32 in the direction opposite to the pressing rollers 69A and 69B. Note that the pressure roller 69E has a larger inclination angle with respect to the shaft 36 than the pressure roller 69D.

  As shown in FIG. 7, the cooling unit 72 includes a plurality of metal cooling rollers 73 </ b> A to 73 </ b> E (five in this embodiment) and the cooling rollers 73 </ b> A to 73 </ b> E with respect to the outer peripheral surface 17 </ b> S side of the tire case 17. And cylinder devices 74A to 74E that move in the approaching and separating directions. The cooling rollers 73A to 73E are rotatably supported at both ends by respective U-shaped support members, and these U-shaped support members are connected to the respective cylinder devices 74A to 74E. The cooling rollers 73 </ b> A to 73 </ b> E are driven to rotate with respect to the rotation direction of the tire case 17 in a state where the cooling rollers 73 </ b> A to 73 </ b> E are in contact with the outer peripheral surface 17 </ b> S of the tire case 17. The reinforcing cord member 26 may be pressed by the cooling rollers 73A to 73E.

  The cylinder devices 74A to 74E are fixed side by side to the base 78, similarly to the cylinder devices 70A to 70E. As described above, the cooling rollers 73A to 73E are connected to the cylinder devices 74A to 74E via the U-shaped support members, respectively.

  The roller rotation shafts of the cooling rollers 73A to 73E correspond to the pressing rollers 69A to 69E, respectively. For example, the reinforcing cord member 26 pressed by the pressing roller 69A is cooled by the cooling roller 73A.

  Although not shown, refrigerant flow paths are formed in the cooling rollers 73A to 73E, respectively. The cooling rollers 73A to 73E are cooled by flowing a coolant (for example, water) through these flow paths.

  In the present embodiment, the cooling unit 72 includes the cooling rollers 73A to 73E and the cylinder devices 74A to 74E. However, the present invention is not limited to this configuration, and the cooling unit 72 is a device that blows out cool air. The reinforcing cord member 26 may be cooled with cold air.

  Further, the surfaces of the pressing rollers 69A to 69E and the cooling rollers 73A to 73E are coated with a fluororesin (Teflon (registered trademark) in this embodiment) in order to suppress adhesion of a molten or soft thermoplastic material. .

  As shown in FIG. 8, a rail fitting portion 79 is provided on the upper portion of the base 78. The rail fitting portion 79 is fitted to a rail 80 having a substantially I-shaped cross section extending in a direction parallel to the guide rail 54 so as to be slidable along the rail 80. The rail 80 is provided on a frame (not shown) of the reinforcing layer forming machine 56.

  The base 78 has both ends of a belt 83 wound around a geared motor 81 provided on one side in the extending direction of the rail 80 and a pulley 82 provided on the other side in the extending direction of the rail 80. Each part is fixed. The base 78 is configured to slide along the rail 80 as the belt 83 is rotated by the geared motor 81. As the base 78 moves, the pressure rollers 69A to 69E and the cooling rollers 73A to 73E fixed to the base 78 also move.

  Here, the cylinder devices 70A to 70E, the cylinder devices 74A to 74E, and the geared motor 81 are controlled by a control device (not shown). This control device optimizes the pressing against the outer peripheral surface 17S of the reinforcing cord member 26 arranged on the outer peripheral surface 17S according to information on the tire to be manufactured (for example, information on the outer shape and size of the outer peripheral surface 17S of the tire case 17). The geared motor is selected so that the pressure roller that calculates the direction and can realize the pressing direction closest to the optimal pressing direction is selected from the pressing rollers 69A to 69E, and the selected pressing roller is positioned on the reinforcing cord member 26. 81 is driven to adjust the position of the base 78. When the selected pressing roller reaches the reinforcing cord member 26, the control device operates the cylinder device of the selected pressing roller to press the reinforcing cord member 26. The control device (not shown), the base 78, the rail fitting portion 79, the rail 80, the motor 81, the pulley 82, and the belt 83 constitute a pressing direction variable means.

  In this embodiment, the reinforcing layer forming machine 56 is configured to include the pressing unit 68 and the cooling unit 72. However, the present invention is not limited to this configuration, and may include only the pressing unit 68. The cooling unit 72 alone may be used. When only the cooling unit 72 is provided, the cooling unit 72 is preferably configured to cool while pressing the reinforcing cord member 26.

Next, the manufacturing method of the tire of this embodiment is demonstrated.
(Skeleton formation process)
(1) As shown in FIG. 3, first, two case division bodies 17A that face each other are disposed on the outer peripheral side of the tire support portion 40 with a reduced diameter, and the two case division bodies 17A Inside, a cylindrical tire inner surface support ring 43 made of a thin metal plate (for example, a steel plate having a thickness of 0.5 mm) is disposed (in FIG. 3, one case division body 17 </ b> A is removed to show the inside. Have been). Note that the two case division bodies 17A are preliminarily molded so that the outer diameter of the tire case 17 decreases from the center in the width direction to the end when the tire case 17 is joined together. .

  The outer diameter of the tire inner surface support ring 43 is set to be approximately the same as the inner diameter of the outer peripheral portion of the case divided body 17A, and the outer peripheral surface of the tire inner surface support ring 43 is the inner peripheral surface of the outer peripheral portion of the case divided body 17A. It comes to adhere to. Thereby, generation | occurrence | production of the unevenness | corrugation (inverse shape of the said unevenness | corrugation) of the junction part (the thermoplastic material 53 for welding) resulting from the unevenness | corrugation produced in the outer periphery of the tire support part 40 by the clearance gap between the tire support pieces 42 can be suppressed. . Further, it is possible to suppress the occurrence of unevenness in the arrangement member (the tire case 17, the tread 30, and other tire constituent members (for example, a reinforcing layer)) due to the gap between the tire support pieces 42. That is, it is possible to suppress the occurrence of unevenness in a portion corresponding to the gap between the tire support pieces 42 of the arrangement member due to the force (tension, pressing force, etc.) applied when arranging the arrangement member. Since the tire inner surface support ring 43 is formed of a thin metal plate, the tire inner surface support ring 43 can be easily inserted into the case divided body 17A by being bent and deformed.

  Then, as shown in FIG. 4B, the diameter of the tire support portion 40 is enlarged and the tire inner surface support ring 43 is held from the inside by a plurality of tire support pieces 42.

(2) As shown in FIG. 5, the extruder 44 is moved, and the nozzle 46 is disposed above the abutting portion of the case divided body 17A. Then, while rotating the tire support portion 40 in the direction of the arrow R, the molten thermoplastic material 53 for welding is extruded from the nozzle 46 toward the joining portion, and the molten thermoplastic material 53 for welding is adhered along the joining portion. . The adhering thermoplastic material 53 for welding is leveled by the leveling roller 48 arranged on the downstream side, and is welded to the outer peripheral surfaces of both case division bodies 17A. The welding thermoplastic material 53 is gradually solidified by natural cooling, and the one case divided body 17A and the other case divided body 17A are welded by the welding thermoplastic material 53, and these members are integrated into the tire case 17 as a unit. Is formed. In addition, the outer peripheral surface 17S of the tire case 17 of the present embodiment has a central portion in the width direction as a flat portion 17F along the width direction, and an end side curve that curves inward in the tire radial direction from both ends of the flat portion 17F. Part 17R.

(Reinforcing layer formation process)
(3) Next, as shown in FIG. 6, the extruder 44 is retracted and the reinforcing layer forming machine 56 is disposed in the vicinity of the tire support portion 40. At this time, the base 78 is disposed above the tire case 17 (see FIG. 8).

  Then, as shown in FIGS. 6 and 7, the reinforcing cord member 26 is supplied from the cord supply portion 58 to the outer peripheral surface 17S side. At this time, the cord heating unit 62 raises the temperature of the heater 64 and causes the air heated by the heater 64 to blow out from the outlet 66 as hot air by the rotation of the fan 65. The hot air blown out from the outlet 66 heats the lower surface 26D side of the reinforcing cord member 26 and causes the lower surface 26D side to be in a molten or softened state. In addition, it is preferable that the code | cord | chord heating part 62 produces | generates the hot air which heats the temperature by the side of the lower surface 26D of the reinforcement cord member 26 to about 100-200 degreeC.

  On the other hand, the control device (not shown) calculates the optimal pressing direction of the reinforcing cord member 26 arranged on the outer peripheral surface 17S according to the extending direction of the outer peripheral surface 17S in the cross-sectional view of the tire case 17 in the width direction, and the optimal pressing A pressing roller that can realize the pressing direction closest to the direction is selected from the pressing rollers 69 </ b> A to 69 </ b> E, and the geared motor 81 is driven so that the selected pressing roller is positioned on the reinforcing cord member 26. Adjust the position. In addition, the optimal pressing direction in the flat part 17F of the outer peripheral surface 17S is a perpendicular direction of the flat part 17F, and the optimal pressing direction in the bending part 17R is a normal direction of the bending part 17R.

  Here, as shown in FIG. 9, when the reinforcing cord member 26 is wound around the one curved portion 17R of the outer peripheral surface 17S, the control device can realize a pressing direction closest to the normal direction of the one curved portion 17R. 69A is selected, and the base 78 is moved so that the pressing roller 69A is positioned on the reinforcing cord member 26. When the pressing roller 69A reaches the reinforcing cord member 26, the cylinder device 70A of the pressing roller 69A is operated and the reinforcing cord member 26 is pressed by the pressing roller 69A.

  The reinforcing cord member 26 heated on the lower surface 26D side is pressed against the curved portion 17R of the outer peripheral surface 17S by the pressing rollers 69A to 69E, and spirals with a certain tension to the outer peripheral surface 17S of the tire case 17 rotating in the arrow R direction. It is wound into a shape.

  Next, as shown in FIG. 10, when the winding portion of the reinforcing cord member 26 reaches a portion where the curvature near the center of one curved portion 17R is small, the control device selects the pressing roller 69B, and the pressing roller 69A The base 78 is moved so as to be positioned on the reinforcing cord member 26. When the pressing roller 69B reaches the reinforcing cord member 26, the cylinder device 70B of the pressing roller 69B is activated and the reinforcing cord member 26 is pressed by the pressing roller 69B. At this time, the pressing roller 69A is pulled back by the cylinder device 70A.

  The reinforcing cord member 26 heated on the lower surface 26D side is pressed by the pressing rollers 69A to 69E to a portion having a small curvature near the center of the one curved portion 17R of the outer peripheral surface 17S, and rotates in the arrow R direction. The outer peripheral surface 17S is wound in a spiral shape with a certain tension.

Similarly, as shown in FIG. 11, when the winding portion of the reinforcing cord member 26 reaches the flat portion 17F, the control device selects the pressing roller 69C that can realize the pressing direction closest to the perpendicular direction of the flat portion 17F. . Also, as shown in FIG. 12, when the winding portion of the reinforcing cord member 26 reaches the other curved portion 17R, the control device can implement a pressing roller 69D that can realize a pressing direction closest to the normal direction of the other curved portion 17R. As shown in FIG. 13, when the winding portion of the reinforcing cord member 26 reaches a portion where the curvature of the other bending portion 17R is large, the control device selects the pressing roller 69E.
In this manner, the reinforcing cord member 26 is wound around the outer peripheral surface 17S while being pressed in a suitable direction against the outer peripheral surface 17S of the tire case 17 by the selected pressing rollers, and the reinforcing layer is formed on the outer peripheral surface 17S. 28 is formed. That is, in this manufacturing apparatus, the reinforcing cord member 26 can be wound around the outer peripheral surface 17S of the tire case 17 while pressing it with an equal pressure.

  Here, when the lower surface 26D of the reinforcing cord member 26 comes into contact with the outer peripheral surface 17S, the molten or softened coating resin material 27 spreads on the outer peripheral surface 17S, and the reinforcing cord member 26 is welded to the outer peripheral surface 17S. Is done. In particular, the reinforcing cord member 26 is wound while being pressed against the outer peripheral surface 17S by the pressing rollers 69A to 69E with an equal pressure, so that the air enters between the reinforcing cord member 26 and the outer peripheral surface 17S during welding. Is suppressed, a bonding area is secured, and the tire case 17 and the reinforcing cord member 26 are firmly bonded.

  On the other hand, the tension applied to the reinforcing cord member 26 is adjusted by applying a brake to the reel (not shown) of the cord supply portion 58 that rotates following the tire case 17 and is thus constant. By winding the reinforcing cord member 26 while applying the tension, it is possible to suppress the reinforcing cord member 26 from meandering. In this embodiment, the tension is adjusted by applying a brake to the reel of the cord supply unit 58. However, even if the tension is adjusted by providing a tension adjusting roller in the conveyance path of the reinforcing cord member 26, etc. Good.

  Further, as shown in FIG. 7, the reinforcing cord member 26 pressed by the pressing rollers 69A to 69E is cooled by cooling rollers 73A to 73E arranged corresponding to the pressing rollers 69A to 69E, respectively. More specifically, for example, the control device (not shown) operates the cylinder device 74A at the same time as operating the cylinder device 70A to bring the cooling roller 73A into contact with the reinforcing cord member 26 pressed by the pressing roller 69A. The reinforcing cord member 26 is cooled. The control device similarly controls the pressing rollers 69B to 69E and the cooling rollers 73B to 73E. Thereby, after welding the reinforcing cord member 26 and the outer peripheral surface 17S, before the reinforcing cord member 26 that is in a molten or softened state is subjected to external force to move (deform), the reinforcing cord member 26 and Since the periphery is cooled and solidified, the reinforcing cord member 26 can be disposed with high accuracy. As a result, deformation of the reinforcing layer 28 can be suppressed. Further, the control device selects one of the pressing rollers 69A to 69E according to the extending direction of the outer peripheral surface 17S in the cross-sectional view of the tire case 17 in the width direction, and selects a cooling roller corresponding to the selected pressing roller. select. Thereby, since the contact area of the selected cooling roller and the reinforcement cord member 26 can be ensured, the reinforcement cord member 26 which is a melted or softened portion can be effectively cooled.

  The reinforcing cord member 26 is wound around the outer peripheral surface 17S while being pressed with equal pressure by the pressing rollers 69A to 69E, and the reinforcing layer 28 is formed on the outer peripheral surface 17S. The reinforcing layer 28 has a substantially constant thickness.

(4) Next, the outer peripheral surface of the reinforcing layer 28 and the outer peripheral surface 17S on both sides in the width direction of the reinforcing layer 28 are processed to be in a roughened state (for example, blasting), and the roughened portion is applied. Apply bonding agent. The bonding agent is not particularly limited, such as triazine thiol adhesive, chlorinated rubber adhesive, phenolic resin adhesive, isocyanate adhesive, halogenated rubber adhesive, etc., but cushion rubber 29 is vulcanized. It is preferable to react at a temperature (90 ° C. to 140 ° C.).

(5) Next, the unvulcanized cushion rubber 29 is wound around the portion where the bonding agent is applied for one turn, and a bonding agent such as a rubber cement composition is applied on the cushion rubber 29, A vulcanized or semi-cured tread rubber is wound on the top for one turn to obtain a green tire case state. In addition, vulcanized means the state that has reached the degree of vulcanization required for the final product, and the semi-vulcanized state has a higher degree of vulcanization than the unvulcanized state, but is required for the final product. This means that the degree of vulcanization is not reached.

(6) Next, the raw tire case is accommodated in a vulcanizing can or mold and vulcanized.
(7) When the seal layer 24 made of a soft material softer than the resin material is bonded to the bead portion 12 of the tire case 17 using an adhesive or the like, the tire 10 is completed.

(8) Finally, the diameter of the tire support portion 40 is reduced, the completed tire 10 is removed from the tire support portion 40, the inner tire inner surface support ring 43 is bent and deformed, and is removed from the tire.

  As described above, in the tire 10 manufactured by the tire manufacturing method of the present embodiment, the reinforcing layer 28 is disposed on the outer peripheral surface 17S of the tire case 17 formed using a resin material. The puncture resistance and the cut resistance are improved as compared with those not provided. In particular, since the reinforcing layer 28 is formed on the flat portion 17F and the curved portion 17R of the tire case 17, the outer peripheral portion of the tire case 17 is reinforced over a wide range, and puncture resistance and cut resistance are further improved. To do.

Further, since the reinforcing cord member 26 is wound around the outer peripheral surface 17S of the tire case 17 and the reinforcing layer 28 is formed, the circumferential rigidity of the tire 10 is improved. By improving the circumferential rigidity, creep of the tire case 17 (a phenomenon in which plastic deformation of the tire case 17 increases with time under a constant stress) is suppressed, and pressure resistance against air pressure from the inner side in the tire radial direction is suppressed. improves.
From the above, the tire 10 is superior in durability as compared with those in which the reinforcing layer 28 is not provided in the flat portion 17F and the curved portion 17R of the tire case 17.

  Since the reinforcing cord member 26 is joined to the outer peripheral surface 17S of the tire case 17 by welding in the tire 10, for example, the reinforcing cord 26A is not directly covered with the coating resin material 27, and the adhesive is directly applied to the outer peripheral surface 17S. As compared with the case where it is adhered by the above, the entry of air around the reinforcement cord 26A is suppressed, and the movement of the reinforcement cord 26A due to input during traveling is effectively suppressed.

  Further, since the tire 10 bears rigidity with a tire case 17 formed of a resin material without using a carcass ply widely used in a conventional rubber tire, the tire 10 is lighter than a rubber tire having a conventional carcass ply. Can be achieved. Further, in the structure of the tire 10 of the present embodiment, since the carcass ply is not used unlike the conventional rubber tire, the number of processing steps at the time of manufacturing the tire can be reduced.

  The reinforcing layer 28 selects a pressing roller capable of realizing a suitable pressing direction from the pressing rollers 69A to 69E according to the extending direction of the outer circumferential surface 17S of the cross section in the width direction of the tire case 17, and is reinforced with the selected pressing roller. The cord member 26 is wound around the outer peripheral surface 17S while being pressed with an equal pressure. Thereby, when the reinforcing cord member 26 is welded to the outer peripheral surface 17S, the air entering between the tire case 17 and the reinforcing cord member 26 is suppressed. Further, since the reinforcing cord member 26 is pressed with an equal pressure, the reinforcing cord member 26 is firmly joined to the outer peripheral surface 17S without unevenness. As a result, the bonding strength between the tire case 17 and the reinforcing cord member is improved, and the occurrence of cracks and separation between the tire case 17 and the reinforcing layer 28 during traveling is suppressed.

  As shown in FIG. 8, in the first embodiment, the pressing rollers 69 </ b> A to 69 </ b> E are columnar or cylindrical, and the respective rotation axes are inclined at different angles with respect to the shaft 36 of the molding machine 32. The present invention need not be limited to this configuration. As shown in FIG. 14, the pressing rollers 84 </ b> A to 84 </ b> E have a conical shape or a conical cylindrical shape, and the respective rotation axes are parallel to the shaft 36 of the molding machine 32. It is good also as a structure set as (horizontal direction).

[Second Embodiment]
Hereinafter, a tire manufacturing method and a tire manufacturing apparatus according to a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 15, in the molding machine 86, the pedestal 34 includes a lower pedestal portion 34B and an upper pedestal portion 34A. A shaft portion 87 is provided on the tire support portion 40 side of the lower surface of the upper pedestal portion 34A. On the other hand, a bearing portion 88 that rotatably supports the shaft portion 87 is provided on the upper surface of the lower pedestal portion 34B on the tire support portion 40 side.

  Further, on the wall portion 89 on the opposite side of the tire support portion 40 of the lower pedestal portion 34B, a geared motor 90, a shaft support portion 92 that rotatably supports the tip end portion of the rotating shaft 91 of the geared motor 90, Is provided. A male screw portion 93 is formed on the outer peripheral surface of the rotating shaft 91, and a female screw portion 95 provided on the lower side of the moving member 94 is screwed into the male screw portion 93. On the other hand, a shaft support 97 is provided on the wall 96 opposite to the tire support 40 of the upper pedestal 34A, and the shaft 98 provided on the upper side of the moving member 94 is rotated by the shaft support 97. It is supported freely.

Here, when the geared motor 90 is driven to rotate the rotating shaft 91, the moving member 94 moves upward or downward along the rotating shaft 91. When the moving member 94 moves downward along the rotation shaft 91, as shown in FIG. 16, the shaft support portion 97 side of the upper pedestal portion 34A moves downward with the shaft portion 87 as the rotation center, and the shaft 36 moves. Inclined with respect to the horizontal direction. The inclination of the shaft 36 is such that the geared motor 37 is downward and the tire support portion 40 is upward.
On the other hand, when the moving member 94 moves upward along the rotation shaft 91, the shaft support portion 97 side of the upper pedestal portion 34A moves upward about the shaft portion 87 as shown in FIG. 36 is inclined with respect to the horizontal direction. The inclination of the shaft 36 is such that the geared motor 37 is upward and the tire support portion 40 is downward.

  As shown in FIG. 15, the pressing portion 102 of the reinforcing layer forming machine 100 includes a pair of pressing rollers 103 and a cylinder device 104. The pressure roller 103 is rotatably supported at both ends by a U-shaped support member, and the U-shaped support member is connected to the cylinder device 104. The roller rotation axis of the pressing roller 103 is along the horizontal direction. The cylinder device 104 is fixed to a frame (not shown) of the reinforcing layer forming machine 100. Accordingly, when the reinforcing layer forming machine 100 moves along the guide rail 54, the pressing roller 103 and the cylinder device 104 also move together with the reinforcing layer forming machine 100.

  Further, the cooling unit 106 (see FIG. 7) of the reinforcing layer forming machine 100 includes a set of cooling roller 107 and cylinder device 108. The cooling roller 107 is rotatably supported at both ends by a U-shaped support member, and the U-shaped support member is connected to the cylinder device 108. The roller rotation axis of the cooling roller 107 is along the horizontal direction. The cylinder device 108 is fixed to a frame (not shown) of the reinforcing layer forming machine 100. Thereby, when the reinforcing layer forming machine 100 moves along the guide rail 54, the cooling roller 107 and the cylinder device 108 also move together with the reinforcing layer forming machine 100.

The control device (not shown) drives the geared motor 90 to incline the shaft 36 according to the extending direction of the outer peripheral surface 17S in the cross-sectional view of the tire case 17 in the width direction. In addition, the control device moves the reinforcing layer forming machine 100 along the guide rail 54 so that the reinforcing cord member 26 can be disposed at a desired position on the outer peripheral surface 17S of the tire case 17, and the pressing roller 103 causes the reinforcing cord member to move. The cylinder device 104 is controlled so as to press 26. On the other hand, the control device also controls the cylinder device 108 of the cooling unit 106 so that the reinforcing cord member 26 pressed by the pressing roller 103 is cooled by the cooling roller 107.
A control device (not shown), a shaft portion 87, a bearing portion 88, a geared motor 90, a rotating shaft 91, a shaft support portion 92, a male screw portion 93, a moving member 94, a female screw portion 95, a shaft support portion 97, and a shaft The portion 98 constitutes a pressing direction variable means.

Next, an operation for forming the reinforcing layer 28 on the outer peripheral surface 17S of the tire case 17 will be described.
As shown in FIG. 18, first, the shaft 36 is inclined by moving the shaft support portion 97 side of the upper pedestal portion 34A downward according to the extending direction of one curved portion 17R of the outer peripheral surface 17S (FIG. 16). As shown). In this state, the reinforcing cord member 26 that has passed through the cord supply unit 58 and the cord heating unit 62 of the reinforcing layer forming machine 100 and is heated or melted or softened on the lower surface 26D side of the one curved portion 17R of the outer peripheral surface 17S. The reinforcing cord member 26 is pressed at the predetermined position by the pressing roller 103 of the pressing portion 102. Then, the tire case 17 rotates with the rotation of the shaft 36 of the molding machine 86 while the reinforcing cord member 26 is pressed by the pressing roller 103, thereby reinforcing one curved portion 17 </ b> R of the outer peripheral surface 17 </ b> S of the tire case 17. The cord member 26 is wound while being pressed.

  Further, when the winding position of the reinforcing cord member 26 reaches the flat portion 17F of the outer peripheral surface 17S, the shaft 36 of the molding machine 86 is in the horizontal direction and is in a state parallel to the roller rotation axis of the pressing roller 103. Then, the tire cord 17 rotates with the rotation of the shaft 36 of the molding machine 86 while the reinforcing cord member 26 is pressed by the pressing roller 103, whereby the reinforcing cord member is formed on the flat portion 17 </ b> F of the outer peripheral surface 17 </ b> S of the tire case 17. 26 is wound while being pressed.

  As shown in FIG. 19, when the winding position of the reinforcing cord member 26 reaches the other curved portion 17R of the outer peripheral surface 17S, the axis of the upper pedestal portion 34A depends on the extending direction of the other curved portion 17R of the outer peripheral surface 17S. The shaft 36 is inclined by moving the support 97 side upward. Then, the tire case 17 rotates with the rotation of the shaft 36 of the molding machine 86 while the reinforcing cord member 26 is pressed by the pressing roller 103, thereby reinforcing the other curved portion 17 </ b> R of the outer peripheral surface 17 </ b> S of the tire case 17. The cord member 26 is wound while being pressed.

The reinforcing cord member 26 pressed by the pressing roller 103 is cooled by a cooling roller 107 provided on the downstream side of the pressing roller 103.
In this way, the reinforcing layer 28 is formed along the outer peripheral surface 17S of the tire case 17.

  Here, in this embodiment, the pressing direction of the pressing roller 103 fixed to the reinforcing layer forming machine 100 is optimized by inclining the shaft 36 of the molding machine 86 with respect to the horizontal direction. For this reason, the structure of the press part 102 of this embodiment can be made into a simple structure compared with the structure of the press part 68 of 1st Embodiment. Note that the configuration of the cooling unit 106 can also be made simpler than the configuration of the cooling unit 72 of the first embodiment.

  Further, since the molding machine 86 can freely set the inclination angle of the shaft 36 with respect to the horizontal direction, the optimum pressing direction of the pressing roller 103 is determined according to the extending direction of the outer peripheral surface 17S in the cross-sectional view of the tire case 17 in the width direction. Can be realized. As a result, the reinforcing cord member 26 can be wound around the outer peripheral surface 17S while being pressed with equal pressure.

[Third Embodiment]
Hereinafter, a tire manufacturing method and a tire manufacturing apparatus according to a third embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 20A and 20B, the pressing portion 112 of the reinforcing layer forming machine 110 includes a pressing roller 113 and a U-shaped support member 114 that supports the pressing roller 113 at both ends in a rotatable manner. A shaft portion 118 rotatably supported in a direction orthogonal to the roller rotation axis by a bearing portion 117 provided at the center portion of the support member 114 and attached to the tip end portion of the rod 116 of the cylinder device 115. ing.

  In addition, a plate 120 extending in a direction orthogonal to the extending direction of the rod 116 is provided on the upper portion of the bearing portion 117, and a pair of cylinder devices 121 are respectively attached to both ends of the plate 120. . The tip of the rod 122 of the cylinder device 121 is disposed to face the upper surface of the support member 114. In addition, a cushion member 123 (for example, rubber) is disposed between the rod 122 and the support member 114. The cushion member 123 is provided on the upper side surface of the support member 114.

  Here, as shown in FIG. 20C, when the rod 122 of one cylinder device 121 is pushed out of the pair of cylinder devices 121 and the rod 122 of the other cylinder device 121 is pulled back, the support member 114 becomes the shaft portion 118. As a rotation axis (rotates counterclockwise in the figure). As a result, the pressing roller 113 supported by the support member 114 also rotates around the shaft portion 118 as the rotation axis.

  On the other hand, as shown in FIG. 20D, when the rod 122 of the other cylinder device 121 is pushed out of the pair of cylinder devices 121 and the rod 122 of the one cylinder device 121 is pulled back, the support member 114 causes the shaft portion 118 to move. Rotates as a rotation axis (rotates clockwise in the figure). As a result, the pressing roller 113 supported by the support member 114 also rotates around the shaft portion 118 as the rotation axis.

  The cooling unit (not shown) of the reinforcing layer forming machine 110 includes a cooling roller, a cylinder device, and the like having the same structure as the pressing unit 112. In addition, the flow path for flowing a refrigerant | coolant is formed in the cooling roller of a cooling part.

The control device (not shown) pushes out one rod 122 of the pair of cylinder devices 121 according to the extending direction of the outer peripheral surface 17S in the cross-sectional view of the tire case 17 in the width direction, and rotates the rotating shaft of the pressing roller 113. Is tilted with respect to the horizontal direction, and then the rod 116 of the cylinder device 115 is pushed out, and the reinforcing cord member 26 is pressed by the pressing roller 113. The control device also controls the cylinder device of the cooling unit, and the reinforcing cord member 26 pressed by the pressing roller 113 is cooled by the cooling roller.
The control device (not shown), the support member 114, the bearing portion 117, the shaft portion 118, and the pair of cylinder devices 121 constitute a pressing direction variable means.

Next, an operation for forming the reinforcing layer 28 on the outer peripheral surface 17S of the tire case 17 will be described.
First, as shown in FIG. 21, the roller rotation shaft of the pressing roller 113 is set to the axial direction of the tire case 17 in accordance with the extending direction of the one curved portion 17 </ b> R of the outer peripheral surface 17 </ b> S in the cross-sectional view in the width direction of the tire case 17. Tilt. In this state, the reinforcing cord member 26 whose lower surface 26D side is in a molten or softened state is pressed to a predetermined position on the outer peripheral surface 17S. Then, the tire cord 17 rotates while the reinforcing cord member 26 is pressed by the pressing roller 113, whereby the reinforcing cord member 26 is wound around the curved portion 17 </ b> R of the outer peripheral surface 17 </ b> S of the tire case 17 while being pressed.

  When the winding position of the reinforcing cord member 26 reaches the flat portion 17F of the outer peripheral surface 17S, the roller rotation shaft of the pressing roller 113 becomes horizontal (parallel to the shaft 36). Then, when the tire cord 17 rotates while the reinforcing cord member 26 is pressed by the pressing roller 113, the reinforcing cord member 26 is wound around the flat portion 17F of the outer peripheral surface 17S of the tire case 17 while being pressed.

  As shown in FIG. 22, when the winding position of the reinforcing cord member 26 reaches the other curved portion 17R of the outer peripheral surface 17S, the extending direction of the other curved portion 17R of the outer peripheral surface 17S in the cross-sectional view of the tire case 17 in the width direction. Accordingly, the roller rotation shaft of the pressing roller 113 is inclined with respect to the shaft 36 of the molding machine 32. Then, the tire case 17 rotates with the rotation of the shaft 36 of the molding machine 32 while the reinforcing cord member 26 is pressed by the pressing roller 113, thereby reinforcing the other curved portion 17 </ b> R of the outer peripheral surface 17 </ b> S of the tire case 17. The cord member 26 is wound while being pressed.

The reinforcing cord member 26 pressed by the pressing roller 113 is cooled by a cooling roller (not shown) provided on the downstream side of the pressing roller 103.
In this way, the reinforcing layer 28 is formed along the outer peripheral surface 17S of the tire case 17.

  Here, in the present embodiment, the pressing direction of the pressing roller 113 with respect to the extending direction of the outer peripheral surface 17 </ b> S in the cross-sectional view of the tire case 17 in the width direction is inclined by tilting the roller rotation shaft of the pressing roller 113 with respect to the shaft 36. Is optimized. For this reason, the structure of the press part 112 of this embodiment can be made into a simple structure compared with the structure of the press part 68 of 1st Embodiment. Further, the configuration of the molding machine 32 is also simpler than that of the second embodiment.

  On the other hand, the pressing direction of the pressing roller 113 is optimized by tilting the roller rotation shaft of the pressing roller 113 with respect to the shaft 36.

  In addition, as shown in FIG. 24, you may provide the groove part 124 in which at least one part of the reinforcement cord member 26 can be inserted in the outer peripheral surface of the press roller 113 along the circumferential direction. By providing the groove portion 124 in this manner, meandering arrangement of the reinforcing cord member 26 when the reinforcing cord member 26 is wound around the outer peripheral surface 17S can be suppressed. The provision of the groove 124 in the pressing roller can also be applied to the first and second embodiments.

  In 3rd Embodiment, it is set as the structure which uses the extrusion force of the cylinder apparatus 115 in order to rotate the press roller 113, However, This invention is not limited to this structure, The modification shown to FIG. 23 (A)-(C) A geared motor 127 is attached to a bearing portion 128 attached to the tip of the rod 116 of the cylinder device 115, as in the pressing portion 126, and the rotating shaft 129 of the geared motor 127 is connected to the central portion of the support member 114. It is good also as a structure. According to this configuration, by rotating the geared motor 127, the support member 114 rotates, and accordingly, the pressing roller 113 also rotates and the roller rotation shaft is inclined with respect to the horizontal direction.

(Other embodiments)
In any of the embodiments described above, the cross-sectional shape of the reinforcing cord member 26 is a trapezoidal shape. However, the present invention is not limited to this configuration, and the cross-sectional shape of the reinforcing cord member 26 may be a circle or a rectangle. It is good also as composition to do.

  Further, in any of the above-described embodiments, the case divided body 17A is joined to form the tire case 17. However, the present invention is not limited to this configuration, and the tire case 17 is formed using a mold or the like. It is good also as a structure which forms these integrally.

  Further, in any of the tires of the above-described embodiments, the cushion rubber 29 is arranged on the reinforcing layer 28. However, the present invention is not limited to this configuration, and the reinforcing layer is similar to the tire 130 shown in FIG. A coating layer 134 made of the thermoplastic resin material 132 for coating may be formed on 28. As a method for forming the covering layer 134, a molten or softened coating thermoplastic material 132 is disposed on the reinforcing layer 28, and the molten or softened covering thermoplastic material 132 is pressed with a roller or the like, and the coated thermoplastic material 132 is leveled. Can be formed. Note that the joining surface side of the sheet-shaped thermoplastic resin for coating 132 to the outer peripheral surface 17S is heated (for example, heated by blowing hot air) and placed on the outer peripheral surface 17S, pressed with a roller or the like, and leveled. May be formed. By forming the covering layer 134 in this way, it is possible to fill a gap between the adjacent reinforcing cord members 26 generated when the reinforcing cord member 26 is wound around the outer peripheral surface 17S, and the surface on which the cushion rubber 29 is disposed is flat. It can be a surface. Thereby, it is possible to prevent air from entering between the covering layer 134 and the cushion rubber 29, and to further improve the bonding strength between the tire case 17 side and the tread 30 side.

  Furthermore, in any of the above-described embodiments, the tire 10 is configured as a so-called tubeless tire in which an air chamber is formed between the tire 10 and the rim 20 by attaching the bead portion 12 to the rim 20. The present invention is not limited to this configuration, and the tire may be configured as a complete tube-shaped tire as shown in FIG. Examples of such a tire include a tire 136 using a tire case 137 in which the bead portions 12 are connected by a connecting portion 138 to form a complete tube shape. The tire 136 is also assembled with a rim in the same manner as the tire 10 shown in FIG.

  In any of the above-described embodiments, the cushion rubber 29 is disposed between the tire case 17 and the tread 30, but the present invention is not limited to this configuration, and the cushion rubber 29 is not disposed. The tread 30 may be arranged directly on the reinforcing layer 28.

  In any of the above-described embodiments, the outer peripheral surface 17S of the tire case 17 is configured by the flat portion 17F and the curved portion 17R. However, the present invention is not limited to this configuration, and the curved portion 17R of the tire case 17 is configured. It is good also as a structure which makes it an inclination part which inclines in the tire radial direction from the flat part 17F, and is good also as a structure which curves the flat part 17F to a tire radial direction outer side gently. To explain an example, a configuration may be adopted in which the outer peripheral surface 142S of the tire case 142 is entirely curved, as in the tire 140 shown in FIG.

  Further, in any of the above-described embodiments, the reinforcing cord member 26 is spirally wound around the outer peripheral surface 17S. However, the present invention is not limited to this configuration, and the reinforcing cord member 26 is discontinuous in the width direction. It is good also as a structure wound so that it may become.

  Furthermore, in any of the above-described embodiments, the reinforcing cord 26A is covered with the covering resin material 27 to form the reinforcing cord member 26, and the reinforcing cord member 26 forms the reinforcing layer 28. 28, the reinforcing cord 26A is not covered with the coating resin material 27, and the reinforcing cord 26A itself is heated and pressed by the pressing portion 112, as shown in FIG. The reinforcing layer 28 may be configured by embedding at least part of the surface 17S.

In the above-described embodiment, the covering resin material 27 forming the reinforcing cord member 26 is made of a thermoplastic material, and the covering resin material 27 is heated to be melted or softened to reinforce the outer peripheral surface 17S of the tire case 17. The cord member 26 is welded, but the present invention is not limited to this configuration, and the reinforcing cord member 26 is bonded to the outer peripheral surface 17S using an adhesive or the like without heating the coating resin material 27. Also good.
The covering resin material 27 forming the reinforcing cord member 26 may be a thermosetting resin, and the reinforcing cord member 26 may be bonded to the outer peripheral surface 17S using an adhesive or the like without being heated.
Further, the covering resin material 27 for forming the reinforcing cord member 26 may be a thermosetting resin, and the tire case 17 may be formed of a thermoplastic material. In this case, the reinforcing cord member 26 may be bonded to the outer peripheral surface 17S using an adhesive or the like, and the portion of the tire case 17 where the reinforcing cord member 26 is disposed is heated and reinforced in a molten or softened state. The cord member 26 may be welded to the outer peripheral surface 17S.
Furthermore, the covering resin material 27 for forming the reinforcing cord member 26 may be made of a thermoplastic material, and the tire case 17 may be made of a thermoplastic material. In this case, the reinforcing cord member 26 may be bonded to the outer peripheral surface 17S using an adhesive or the like, and the portion of the tire case 17 where the reinforcing cord member 26 is disposed is heated to be in a molten or softened state. Alternatively, the covering resin material 27 may be heated to be melted or softened, and the reinforcing cord member 26 may be welded to the outer peripheral surface 17S. In addition, when both the tire case 17 and the reinforcing cord member 26 are heated and melted or softened, the two are mixed well, so that the bonding strength is improved. When the resin material forming the tire case 17 and the covering resin material 27 forming the reinforcing cord member 26 are both thermoplastic materials, the same kind of thermoplastic material, particularly the same thermoplastic material, should be used. Is preferred.
For example, a reinforcing layer may be configured by winding a rubber-coated cord (an example of a reinforcing cord member) obtained by coating the reinforcing cord 26A with vulcanized rubber around the outer peripheral surface 17S of the tire case 17 made of a resin material. Good. In this case, as described above, the rubber-coated cord may be welded or bonded to the tire case 17.

  Furthermore, in any of the above-described embodiments, the reinforcing cord member 26 is wound around the substantially flat outer peripheral surface 17S of the tire case 17, but the present invention is not limited to this configuration, and the outer peripheral surface 17S has a spiral shape in advance. The reinforcing cord member 26 may be wound around the outer peripheral surface 17S while the reinforcing cord member 26 is fitted in the groove. With this configuration, meandering of the reinforcing cord member 26 when the reinforcing cord member 26 is wound around the outer peripheral surface 17S can be suppressed. Further, in the tire formed as described above, at least a part of the reinforcing cord member 26 is embedded in the outer peripheral surface when the tire case 17 is viewed in the axial sectional view. According to this tire, the movement of the reinforcing cord member 26 due to input during traveling is effectively suppressed.

In addition, the order for manufacturing the tires 10, 130, 136, and 140 is not limited to the order of the first to third embodiments described above, and may be changed as appropriate.
The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

10 Tire 17 Tire case (tire frame member)
17S outer peripheral surface 17R curved portion 26 reinforcing cord member 26A reinforcing cord 27 resin material for coating 28 reinforcing layer 56 reinforcing layer forming machine 62 cord heating portion 68 pressing portion 69A to E pressing roller 72 cooling portion 73A to E cooling roller 84A to E pressing Roller 86 Molding machine 100 Reinforcing layer forming machine 102 Pressing part 103 Pressing roller 106 Cooling part 107 Cooling roller 110 Reinforcing layer forming machine 112 Pressing part 113 Pressing roller 124 Groove part 126 Pressing part 130 Tire 136 Tire 137 Tire case 140 Tire 142 Tire case 142S Outer surface

Claims (18)

A skeleton forming step of forming an annular tire skeleton member having a smaller outer diameter on the end side than the central portion in the axial direction using a resin material;
A reinforcing layer forming step of forming a reinforcing layer on the outer peripheral surface by winding a reinforcing cord member around the outer peripheral surface of the tire skeleton member while pressing the reinforcing cord member with a pressing member;
With
The pressing member includes a plurality of pressing rollers having different pressing directions,
In the reinforcing layer forming step, one of the plurality of pressing rollers is selected according to the direction of the outer peripheral surface in the axial sectional view of the tire frame member, and the reinforcing cord member is pressed by the selected pressing roller. a tire manufacturing method of changing the pressing direction of the pressing member by. A skeleton forming step of forming an annular tire skeleton member having a smaller outer diameter on the end side than the central portion in the axial direction using a resin material;
A reinforcing layer forming step of forming a reinforcing layer on the outer peripheral surface by winding a reinforcing cord member around the outer peripheral surface of the tire skeleton member while pressing the reinforcing cord member with a pressing member;
With
The resin material forming the tire frame member is a thermoplastic material having thermoplasticity,
The reinforcing cord member is formed by coating a reinforcing cord with a thermoplastic material for coating,
In the reinforcing layer forming step, the pressing direction of the pressing member is changed in accordance with the direction of the outer peripheral surface in an axial sectional view of the tire frame member, and the reinforcing layer forming step includes covering the reinforcing cord member A heat treatment that heats at least one of the thermoplastic material for use in the tire frame member and the thermoplastic material in a portion where the reinforcing cord member of the tire frame member is disposed to melt or soften the outer peripheral surface and the reinforcing cord member And a method for manufacturing a tire. The outer peripheral surface is at least partially curved radially inward,
The tire manufacturing method according to claim 1 or 2 , wherein, in the reinforcing layer forming step, a pressing direction of the pressing member is changed in a curved portion of the outer peripheral surface in accordance with a normal direction of the curved portion. The tire manufacturing method according to claim 3 , wherein a pressing direction of the pressing member is along a normal direction of the curved portion in the curved portion of the outer peripheral surface. The pressing member includes a plurality of pressing rollers having different pressing directions,
In the reinforcing layer forming step, one of the plurality of pressing rollers is selected according to the direction of the outer peripheral surface in the axial sectional view of the tire frame member, and the reinforcing cord member is pressed by the selected pressing roller. The tire manufacturing method according to claim 2 . The pressing member is a single pressing roller,
In the reinforcing layer forming step, tilting the axis of the tire frame member in accordance with the direction of the outer peripheral surface in the axial direction cross section of the tire frame member, wherein the reinforcing cord member to claim 2 pressed by the pressing roller Tire manufacturing method. The pressing member is a pressing roller that changes an angle of a rotating shaft according to a direction of the outer peripheral surface in an axial cross-sectional view of the tire frame member,
Wherein the reinforcing layer forming step, according to claim 2 wherein the pressing roller in accordance with the direction of the outer peripheral surface in the axial direction cross section of the tire frame member for pressing the reinforcing cord member by changing the angle of the rotation axis Tire manufacturing method. Wherein the outer peripheral surface of the pressing roller, said any one of the reinforcing cord according to claim groove can be inserted at least a portion of the member is formed first and claims 5 to claim 7 along the outer peripheral surface The manufacturing method of the tire of description. The resin material forming the tire frame member is a thermoplastic material having thermoplasticity,
The reinforcing cord member is formed by coating a reinforcing cord with a thermoplastic material for coating,
In the reinforcing layer forming step, at least one of the thermoplastic material for covering the reinforcing cord member and the thermoplastic material in the portion of the tire frame member where the reinforcing cord member is disposed is heated to a molten or softened state. It comprises thermal treatment of method for producing a tire according to claim 1 for welding and said reinforcing cord member and the outer peripheral surface. The tire reinforcing method according to claim 1, wherein the reinforcing layer forming step includes a cooling process for cooling the reinforcing cord member disposed on the outer peripheral surface. Wherein the cooling process, according to claim 10 for cooling the reinforcing cord member cooling roller to change the angle of the rotary shaft is brought into contact with the reinforcing cord member in accordance with the direction of the outer peripheral surface in the axial section of the tire frame member The manufacturing method of the tire as described in any one of. A tire formed of a resin material and wound while pressing a reinforcing cord member toward the central portion and the end portion of the outer peripheral surface of an annular tire skeleton member having an outer diameter smaller on the end side than the central portion in the axial direction. Manufacturing equipment,
A pressing member that presses the reinforcing cord member against the outer peripheral surface;
A pressing direction variable means for changing a pressing direction of the pressing member according to a direction of the outer peripheral surface in an axial sectional view of the tire skeleton member;
Equipped with a,
The pressing member includes a plurality of pressing rollers having different pressing directions,
The tire pressing apparatus is a tire manufacturing apparatus that selects one of the plurality of pressing rollers and changes the pressing direction of the pressing member by pressing the reinforcing cord member with the selected pressing roller . A base that moves along the axial direction of the tire frame member;
The plurality of pressing rollers are attached to the base side by side in the axial direction of the tire frame member via a cylinder device, respectively.
The cylinder device moves the pressing roller in a direction contacting and separating from the outer peripheral surface of the tire frame member,
The pressing roller located at the center of the base has a rotation axis along the horizontal direction,
The pressing roller positioned on one side of the base with respect to the pressing roller positioned in the center has a rotation axis inclined with respect to the horizontal direction,
The pressing roller positioned on the other side of the base with respect to the pressing roller positioned at the center is inclined with respect to the horizontal direction in a direction opposite to the rotating shaft of the pressing roller positioned on one side of the base. The tire manufacturing apparatus according to claim 12. An annular tire skeleton member formed using a resin material and having a smaller outer diameter on the end side than the central portion in the axial direction;
A reinforcing layer disposed on the outer peripheral surface of the tire frame member and formed by winding a reinforcing cord member around the central portion and the end side of the outer peripheral surface;
Equipped with a,
A tire in which at least a part of the reinforcing cord member is embedded in the outer peripheral surface in a cross-sectional view in the axial direction of the tire frame member . An annular tire skeleton member formed using a resin material and having a smaller outer diameter on the end side than the central portion in the axial direction;
A reinforcing layer disposed on the outer peripheral surface of the tire frame member and formed by winding a reinforcing cord member around the central portion and the end side of the outer peripheral surface;
With
The reinforcing cord member is configured to cover the reinforcing cord with a resin material separate from the resin material forming the tire frame member, and is joined to the outer peripheral surface,
At least one of the resin material forming the tire frame member and the resin material forming the reinforcing cord member is a thermoplastic material having thermoplasticity,
A tire in which the tire frame member and the reinforcing cord member are welded . The tire according to claim 15 , wherein at least a part of the reinforcing cord member is embedded in the outer peripheral surface in a cross-sectional view in the axial direction of the tire frame member. The tire according to claim 14 , wherein the reinforcing cord member is configured by covering the reinforcing cord with a resin material separate from the resin material forming the tire frame member, and is joined to the outer peripheral surface. At least one of the resin material forming the tire frame member and the resin material forming the reinforcing cord member is a thermoplastic material having thermoplasticity,
The tire according to claim 17 , wherein the tire frame member and the reinforcing cord member are welded.

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