JP6258680B2 - Pneumatic tire and manufacturing method thereof - Google Patents

Description

  The present invention relates to a pneumatic tire and a method for manufacturing the same.

Conventionally, as Patent Document 1, a tire belt (reinforcing member) having a configuration in which another wire coil is wound from two directions intersecting with a plurality of wire coils arranged in parallel in the longitudinal direction is known. .
Patent Document 2 discloses a tire belt having a configuration in which a plurality of belt cords extending in three intersecting directions are woven together.
Patent Document 3 discloses a tire belt made of a thin metal plate having a mesh structure.

However, in patent document 1, since only the other wire coil which cross | intersects the wire coil extended in a longitudinal direction is tangled, there is a possibility that it may rub against each other and wear and may break depending on the case. In particular, when a resin material is used for the wire coil for weight reduction, this problem becomes remarkable.
In Patent Document 2, as in the case of Patent Document 1, the belt cords are slidably contacted with each other and worn, and in some cases, the belt cord may be broken.
Moreover, in patent document 3, since the whole is comprised with the single thin metal material, there exists a possibility that it may fracture | rupture, when an external force concentrates on the part when the built-in tires run on a curbstone.
In any of the above-mentioned patent documents, there is no description regarding a configuration for reducing the weight of the side reinforcing layer and improving the durability.

JP-A-1-237203 JP-A-5-162508 JP 2000-25412 A

  This invention makes it a subject to provide the pneumatic tire provided with the side reinforcement layer excellent in durability with light weight, and its manufacturing method.

As a means for solving the above problems, the present invention provides:
A pneumatic tire having a side reinforcing layer,
The side reinforcing layer is
A substrate including a plurality of wires arranged to extend in a specific direction at intervals,
The base material includes a polygonal portion composed of a plurality of quadrangular or hexagonal shapes that are repeatedly formed two-dimensionally,
Each polygonal part is defined by a threaded part and a single line part;
Each of the threaded portions is formed by twisting two or more wires arranged adjacent to each other among the wires,
Each of the single wire portions provides one of the wires constituting the screwed portion, and provides a pneumatic tire.

  With this configuration, it is possible to effectively prevent rubbing between the wires at the screwed portion formed by twisting the wires twice or more. Therefore, it is possible to greatly reduce the possibility that the wires are rubbed and broken due to wear. In addition, the polygonal portion can increase multidirectional rigidity. Furthermore, since the polygonal part is merely formed continuously on the same plane, it is not necessary to make it multi-layered, and the weight can be reduced. That is, it is possible to reduce the weight while maintaining the durability of the side reinforcing layer.

  One end of the side reinforcing layer may be disposed between the inner surface of one end of the belt and the outer surface of the carcass ply, and the other end may be disposed on the bead filler.

  The side reinforcing layer may be arranged such that one end thereof is disposed on the outer surface of the carcass ply in a range of 60% or less of the tire cross-section height and the other end is disposed on the bead filler.

  The side reinforcing layer may be disposed on the outer surface of the carcass ply between the belt and the bead filler.

  The side reinforcing layer may be arranged inside the carcass ply with the other end folded back from the outside at the bead portion and folded back from the inside to the outside at the bead portion.

  The side reinforcing layer may be disposed inside the carcass ply with the other end folded back from the inside to the outside at the bead portion and folded from the inside to the outside at the bead portion.

  It is preferable that each of the side reinforcing layers is formed of a vertical wire material in which the base material has a strip shape and both side portions extend in the longitudinal direction.

  With this configuration, it is easy to maintain the side reinforcing layer in a stable shape with the vertical wires on both sides of the base material, and the rigidity balance can be improved.

  In the side reinforcing layer, it is preferable that the base material includes three or more of the vertical wires, and a plurality of polygonal portions are formed in each divided region between the vertical wires.

  With this configuration, the rigidity in each divided region can be changed so as to be appropriate for the side reinforcing layer.

  It is preferable that the side reinforcing layer can change the shape of each polygonal part constituting the base material.

  With this configuration, even if the required rigidity has directionality, it can be dealt with by changing the shape of the polygonal portion accordingly. For example, it may be formed so as to be short in a direction where rigidity is required and long in a direction where rigidity is not required.

  The side reinforcing layer is preferably formed by arranging polygonal portions having different shapes between the divided regions.

  With this configuration, the level of rigidity in each divided region can be set to a value suitable for the side reinforcing layer.

  The side reinforcing layer only needs to be adjustable by changing the shape of the polygonal portion and changing the pitch of the threaded portion.

  The side reinforcing layer only needs to be adjustable by changing the pitch of the threaded portions, the number of times of twisting between the wires, the inclination angle of the single wire extending from the threaded portion, or the interval between adjacent wires.

  The side reinforcing layer may further include a covering portion that coats the entire base material.

As a means for solving the above problems, the present invention provides:
A pneumatic tire having a side reinforcing layer,
The side reinforcing layer is
A threaded portion formed by twisting wires together;
A single wire portion formed from one of the wires extending from the threaded portion;
Comprising a substrate formed by continuously forming a polygonal part composed of a quadrangle or a hexagon surrounded by
The threaded portion of the base material is formed by twisting two wire materials two or more times.

  With this configuration, it is possible to effectively prevent rubbing between the wires at the screwed portion formed by twisting the wires twice or more. Therefore, it is possible to greatly reduce the possibility that the wires are rubbed and broken due to wear. In addition, the polygonal portion can increase multidirectional rigidity. Furthermore, since the polygonal part is merely formed continuously on the same plane, it is not necessary to make it multi-layered, and the weight can be reduced. That is, it is possible to reduce the weight while maintaining the durability of the side reinforcing layer.

Further, the present invention provides a means for solving the above-described problems,
Polygonal parts composed of a quadrangle or a hexagon surrounded by a twisted part formed by twisting wires together and a single wire part extending from the screwed part and formed from one side of the wire on the same plane The manufacturing method of the pneumatic tire characterized by including the formation process of the side reinforcement layer provided with the base material formed continuously in this.

  Furthermore, it is preferable to provide the formation process of the belt which coats the whole said base material with a coating | coated part.

  According to the present invention, the side reinforcing layer of the tire is provided with a base material composed of a plurality of polygonal parts surrounded by the twisted part and the single wire part, and the twisted part is twisted two times or more between the two wire members. Since they are combined, there is almost no friction between the wires, and there is no fear of cutting due to wear. Therefore, the durability of the side reinforcing layer can be enhanced and desired performance can be exhibited over a long period of time.

It is a fragmentary sectional view of the pneumatic tire concerning this embodiment. It is a perspective view of the side reinforcement layer of FIG. It is a top view of the base material shown in FIG. It is an enlarged view of one polygon part shown in FIG. It is a top view of the base material which shows the modification of FIG. It is a top view of the base material which shows the modification of FIG. It is a top view of the base material which shows the modification of FIG. It is a top view of the base material which shows the modification of FIG. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning a 2nd embodiment. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning a 3rd embodiment. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning a 4th embodiment. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning a 5th embodiment. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning a 6th embodiment. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning other embodiments. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning other embodiments. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning other embodiments. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning other embodiments. It is a fragmentary sectional view of the pneumatic tire provided with the side reinforcement layer concerning other embodiments. It is a top view of the base material concerning other embodiments. It is a top view of the base material concerning other embodiments.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In addition, the following description is only illustrations essentially and does not intend restrict | limiting this invention, its application thing, or its use. In the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the ratio of each dimension is different from the actual one.

  FIG. 1 is a partial cross-sectional view of a pneumatic tire according to the first embodiment. In this pneumatic tire, the external structure includes a tread portion 1, a shoulder portion 2, a side portion 3 and a bead portion 4. The internal structure includes a belt 5 provided from the tread portion 1 to the shoulder portion 2. A reinforcement ply 6 is provided on the outer peripheral side of the belt 5. A carcass ply 7 is provided on the inner peripheral side of the belt 5. The carcass ply 7 is directed from the tread portion 1 to the bead portion 4, folded back by a bead core 8 incorporated therein, and reaches the outer surface side beyond the bead filler 9 adjacent thereto. A side reinforcing layer 10 is provided on the outer surface side of the carcass ply 7. Note that description of other members is omitted here.

(First embodiment)
The side reinforcing layer 10 according to the first embodiment has one end disposed between one inner surface of the belt 5 and the outer surface of the carcass ply 7, and the other end between the inner surface of the bead filler 9 and the outer surface of the carcass ply 7. Arranged between.

  As shown in FIG. 2, the side reinforcing layer 10 is formed in a sheet shape by covering the surface of the base material 11 with a covering portion 12.

  As shown in FIG. 3, the base material 11 is a sheet-like material in which a plurality of wire portions 13 are twisted together at a predetermined position to form a plurality of polygonal portions 14.

  For the wire 13, a metal material such as steel, a resin material made of organic fibers such as polyester, aramid, rayon, and nylon can be used. Each wire 13 may be composed of a single wire, but a plurality of thinner wires may be bundled or twisted together to form a single wire.

  The base material 11 is formed by arranging a plurality of one wire 13 in the vertical direction (longitudinal direction) and twisting adjacent wire materials in the vertical direction at a predetermined pitch. That is, a polygonal portion 14 is formed that is surrounded by a threaded portion 15 in which adjacent wire rods are twisted together and a single wire portion 16 made of one wire rod 13 extending from the threaded portion 15. Here, the polygon part 14 is comprised by the regular hexagon. Further, the screwing portion 15 is formed by twisting the wire materials two or more times. Here, the threaded portion 15 is formed by twisting the wire rods twice and a half (in FIG. 2, a circular space is shown at the center position of the threaded portion 15; This is to make the state easy to understand, and no space is actually formed.) The wire 13 (vertical wire 17) on both sides is used while extending straight in the vertical direction. The polygonal part 14 is continuously formed on the same plane between the vertical wire rods 17 and constitutes a honeycomb form.

  As shown in FIG. 4, the description will be made in more detail by focusing on one polygonal portion 14. The polygonal portion 14 includes a first single wire portion 16A composed of a first wire rod 13A that branches off from a screwed portion 15 obtained by twisting two adjacent wire rods 13 and extends, and a second single wire composed of a second wire rod 13B. Part 16B. Moreover, it has the 1st screwing part 15A which twisted together the 1st wire 13A and the 3rd wire 13C adjacent to the 1st wire 13A on the opposite side to the 2nd wire 13B. Furthermore, it has the 2nd screwing part 15B which twisted together the 4th wire 13D adjacent to the 2nd wire 13B and this 2nd wire 13B on the opposite side to 13 A of 1st wires. Furthermore, it has the 3rd single wire part 16C which consists of the 1st wire 13A branched from 15 A of 1st screwing parts, and the 4th single wire part 16D which consists of the 2nd wire 13B branched from the 2nd screwing part 15B. The third single wire portion 16C (first wire rod 13A) and the fourth single wire portion 16D (second wire rod 13B) are twisted together to form a screw portion 15.

  The shape of the polygonal portion 14 can be changed to a vertically long shape or a horizontally long shape by changing the threaded portion pitch, that is, the honeycomb density. Here, as shown in FIG. 3, the threaded portion pitch refers to a longitudinal pitch P1 which is a distance between the longitudinally threaded portions 15 (here, the distance between the center positions) and a laterally threaded portion 15. Means a horizontal pitch P2.

  The adjustment of the vertical pitch P <b> 1 can be performed by increasing or decreasing the number of times of screwing of the screwing portion 15 or adjusting the inclination angle of the single wire portion 16.

  As the number of times of screwing of the threaded portion 15 is increased, the wires can be made to be less likely to rub against each other. By adjusting the number of times of screwing, the length of the screwing part 15 can be changed and the vertical pitch P1 can be adjusted. For example, as shown in FIG. 7, each regular hexagon can be made into a vertically long shape by increasing the number of times of screwing, or it can be made into a horizontally long shape (not shown) by reducing the number of times of screwing. it can.

  The vertical pitch P1 can also be adjusted by changing the inclination angle of the single wire portion 16 extending from the screwing portion 15 (inclination angle θ of the single wire portion 16 with respect to the vertical direction (vertical direction) in FIG. 3). In FIG. 5, the inclination angle with respect to the threaded portion 15, that is, the inclination angle θ with respect to the vertical direction is increased to form a horizontally long shape. In FIG. 6, the inclination angle with respect to the screwed portion 15, that is, the inclination angle θ with respect to the vertical direction is reduced to form a vertically long shape.

  The adjustment of the lateral pitch P2 can be performed by adjusting the interval of the wire 13. That is, the polygonal part 14 can be made horizontally long by widening the interval of the wire 13, and vertically long by making it narrow.

  In this way, the regular hexagon can be adjusted to either a vertically long shape or a horizontally long shape by increasing or decreasing the number of times of screwing of the screwing portion 15 or adjusting the inclination angle θ of the single wire portion 16. By adopting a vertically long shape, the rigidity in the vertical direction can be reduced compared to the horizontal direction. On the other hand, by adopting a horizontally long shape, the rigidity in the horizontal direction can be reduced compared to the vertical direction.

  In the case of the former, that is, in the case of the side reinforcing layer 10 having a longitudinal shape (tire radial direction) less rigid than the lateral direction by adopting a vertically long shape, during traveling by a vehicle using a tire having the side reinforcing layer 10 The steering stability performance (steering performance) can be improved. Moreover, the strength from the side surface of the side portion 3 can be sufficiently increased without increasing the weight by using the side reinforcing layer 10 having the above-described configuration.

  The shape of the polygonal portion 14 of the base material 11 is not limited to a hexagon (including a regular hexagon and a vertically long or a horizontally long hexagon), and may be a quadrangle shown in FIG. That is, by making the length of the single wire portion 16 sufficiently larger than the screwed portion 15, it can be formed into a quadrangle. In FIG. 8, the polygonal portion 14 has a rhombus shape.

  The substrate 11 having the above-described structure is coated with a thin rubber (topping rubber) (not shown) or coated with a film-like synthetic resin by heat welding to form the covering portion 12 and the side reinforcing layer 10. Become.

  In the tire including the side reinforcing layer 10 having the above-described configuration, the wire portions are rubbed with each other in a used state (running by the tire) because the screwed portions 15 of the wire materials are twisted together at a number of times of twisting of two or more. There is no. Therefore, there is no fear that the wire 13 is damaged due to wear and cut.

(Second Embodiment)
As shown in FIG. 9, the side reinforcing layer 10 according to the second embodiment has one end disposed on the outer surface of the carcass ply 7 and within the range of 60% or less of the tire cross-section height from the lowest end position, and the other end is a bead. It is arranged between the inner surface of the filler 9 and the outer surface of the carcass ply 7.

(Third embodiment)
As shown in FIG. 10, the side reinforcing layer 10 according to the third embodiment is disposed on the outer surface of the carcass ply 7 between the belt 5 and the bead filler 9.

(Fourth embodiment)
As shown in FIG. 11, the side reinforcing layer 10 according to the fourth embodiment has one end disposed between one end inner surface of the belt 5 and the outer surface of the carcass ply 7, and the other end of the belt 5 in front of the bead filler 9. And bead filler 9.

  According to this configuration, it is possible to suppress deformation due to the secondary cross-sectional mode (vibration of the tire cross-section caused by vibration during tire travel) of the buttress portion that connects the tread portion 1 and the side portion 3 of the tire. The resulting 250 to 315 Hz road noise can be reduced.

(Fifth embodiment)
As shown in FIG. 12, the side reinforcing layer 10 according to the fifth embodiment has one end disposed on the belt side and the other end folded together with the carcass ply 7 from the outside to the inside of the bead core 8 (DOWN structure). . Specifically, one end of the side reinforcing layer 10 is located at a position ± (belt width × 5 to 10%) from the end of the belt 5 (in the case of +, overlaps with the belt 5, and in the case of − is separated from the end of the belt 5. .) On the other hand, the other end of the side reinforcing layer 10 is in the range of 0 to 100% of the height (dimension in the tire radial direction) from the lower end of the bead filler 9, and preferably in the range of 20 to 50%.

  According to this configuration, the tension of the side reinforcement layer itself can be increased, the lateral rigidity, the longitudinal rigidity, and the longitudinal rigidity of the tire can be increased to prevent deformation, and road noise of 250 to 315 Hz resulting from this deformation can be reduced. It becomes possible.

(Sixth embodiment)
As shown in FIG. 13, the side reinforcing layer 10 according to the sixth embodiment has one end disposed on the belt side and the other end folded together with the carcass ply 7 from the inside to the outside of the bead core 8. Specifically, one end of the side reinforcing layer 10 is located at a position ± (belt width × 5 to 10%) from the end of the belt 5 (in the case of +, overlaps with the belt 5, and in the case of − is separated from the end of the belt 5. .) On the other hand, the other end of the side reinforcing layer 10 is in the range of 20 to 50% of the height of the carcass ply 7 (the dimension in the tire radial direction from the lower end position of the bead core 8).

  According to this configuration, the tension applied to the carcass ply 7 by the side reinforcing layer 10 can be increased. Moreover, the deformation | transformation by the cross-sectional secondary mode of the buttress part which connects the tread part 1 and the side part 3 of a tire can be suppressed, and it becomes possible to reduce the 250-315 Hz road noise resulting from this deformation | transformation.

An actual vehicle feeling test was performed using a tire including the side reinforcing layer 10 of the comparative example and a tire including the side reinforcing layer 10 of the example according to the present invention. Specifically, pneumatic tires having a tire size of 195 / 65R15 were used, and mass, longitudinal rigidity, lateral rigidity, longitudinal rigidity, steering stability, riding comfort, and road noise (R / N) were evaluated. The numerical value shown below shows an index when Comparative Example 1 is set to 100.
In terms of mass, a smaller index indicates a lighter weight.
Fore-and-aft rigidity is the air pressure specified by the vehicle, and in the state where a load corresponding to the load of the actual vehicle is applied, the displacement when a lateral force in the width direction is further applied to the tire is measured, and the inverse is calculated. Is.
The lateral stiffness is the air pressure specified by the vehicle, and when the load corresponding to the load of the actual vehicle is loaded, the displacement when the lateral force in the width direction is further applied to the tire is measured, and the reciprocal is calculated. Is.
The longitudinal rigidity is obtained by measuring the displacement in a state where a load corresponding to the load of the actual vehicle is applied, and calculating the reciprocal of the air pressure specified by the vehicle.
In terms of handling stability, a comparison was made by sensory evaluation of dry road running and wet road running. The larger the value, the higher the steering stability performance and the better.
Riding comfort was judged by the driver's feeling.
Road noise (R / N) is an index obtained by indexing the value measured at the position of the driver's ear on the window side when traveling on a paved good road test course at a speed of 100 km / h. The smaller the value, the better the performance.

比較例１では、補強構造としてカーカスプライ７のみを設けた構成としている。
比較例２では、補強構造としてカーカスプライ７のみを設けただけであるが、比較例１に比べて質量及び剛性の高い構成としている。
比較例３では、補強構造としてカーカスプライ７のほかに、従来同様なスチール製の線材１３を並設してゴム層で被覆してなる補強層を設けた構成としている。補強層の上端位置をタイヤ断面高さの７５％の位置とし、線材１３が延びる方向をタイヤ周方向（０°方向）としている。
比較例４では、比較例３と同様な被覆層を設けた構成としている。但し、線材１３が延びる方向をタイヤ周方向に対して４５°傾斜した方向（４５°方向）としている。
実施例１では、図１に示す補強層を備えた構成としている。
実施例２では、図９に示す補強層を備えた構成としている。
実施例３では、図１０に示す補強層を備えた構成としている。
実施例４では、図１１に示す補強層を備えた構成としている。
実施例５では、図１２に示す補強層を備えた構成としている。
実施例６では、図１３に示す補強層を備えた構成としている。

In Comparative Example 1, only the carcass ply 7 is provided as a reinforcing structure.
In Comparative Example 2, only the carcass ply 7 is provided as the reinforcing structure, but the structure is higher in mass and rigidity than in Comparative Example 1.
In Comparative Example 3, in addition to the carcass ply 7 as a reinforcing structure, a steel wire rod 13 similar to the conventional steel wire 13 is provided side by side and a reinforcing layer formed by covering with a rubber layer is provided. The upper end position of the reinforcing layer is 75% of the tire cross-section height, and the direction in which the wire 13 extends is the tire circumferential direction (0 ° direction).
In Comparative Example 4, the same coating layer as in Comparative Example 3 is provided. However, the direction in which the wire 13 extends is a direction inclined by 45 ° with respect to the tire circumferential direction (45 ° direction).
In Example 1, it is set as the structure provided with the reinforcement layer shown in FIG.
In Example 2, it is set as the structure provided with the reinforcement layer shown in FIG.
In Example 3, it is set as the structure provided with the reinforcement layer shown in FIG.
In Example 4, it is set as the structure provided with the reinforcement layer shown in FIG.
In Example 5, it is set as the structure provided with the reinforcement layer shown in FIG.
In Example 6, it is set as the structure provided with the reinforcement layer shown in FIG.

  As is clear from Table 1, in any of the configurations of Examples 1 to 6, the rigidity is increased as compared with Comparative Example 1 without increasing the mass as compared with Comparative Examples 2 to 4, and maneuvering is performed. Stability could be improved. In addition, the ride comfort did not deteriorate as much as in Comparative Examples 2 to 4, and road noise did not increase.

  In addition, this invention is not limited to the structure described in the said embodiment, A various change is possible.

(Other embodiments)
In the first embodiment, the other end of the side reinforcing layer 10 is disposed between the bead filler 9 and the outer surface of the carcass ply 7. However, as shown in FIG. You may make it locate in the outer surface of a part. Further, the other end of the side reinforcing layer 10 may be positioned on the inner surface (between the bead filler 9) of the folded portion of the carcass ply 7 as shown in FIG. Furthermore, as shown in FIG. 16, the other end of the side reinforcing layer 10 may be an arbitrary position on the upper side that does not reach the bead filler 9.

  In the second embodiment, the other end of the side reinforcing layer 10 is disposed between the bead filler 9 and the outer surface of the carcass ply 7. However, as shown in FIG. It may be arranged on the outer surface side of the part, or may be arranged between the inner surface of the folded portion of the carcass ply 7 and the outer surface of the bead filler 9 as shown in FIG.

  In the said 1st Embodiment, although the density of the polygon part 14 which comprises the side reinforcement layer 10 was made uniform, you may make it make the density of the polygon part 14 differ in 2 area | regions of a tire radial direction. .

  For example, as shown in FIG. 19, by providing three vertical wires 17, two divided regions (a first divided region 18 and a second divided region 19) are configured, and each divided region 18, 19 has a polygonal shape. You may make it make the density of the part 14 differ. In this case, the high-density second divided area 19 may be arranged on the end side of the belt 5 and the low-density first divided area 18 may be arranged toward the bead filler side. Thereby, in spite of being lightweight, the rigidity at the end of the belt 5 can be increased to ensure steering stability, and the riding comfort is not deteriorated.

  Further, although the base material 11 is formed with two divided regions by the three vertical wires 17, as shown in FIG. 20, the three divided regions are formed, and the density of the polygonal portion 14 in each divided region. May be made different. In this case, the density of the divided region in the central portion is increased and disposed in the buttress portion connecting the tread portion 1 and the sidewall portion of the tire, and the divided regions having low density on both ends are separated from the tread portion 1 and the side portions. What is necessary is just to arrange | position to the part 3 and the bead part 4, respectively. Thereby, the deformation | transformation by the cross-sectional secondary mode in a buttress part can be prevented, and generation | occurrence | production of the road noise accompanying this deformation | transformation can be reduced.

  Further, the density of the polygonal portion 14 is increased at the central portion and one end side in the three divided regions shown in FIG. It is also possible to reduce the weight and reduce the road noise.

DESCRIPTION OF SYMBOLS 1 ... Tread part 2 ... Shoulder part 3 ... Side part 4 ... Bead part 5 ... Belt 6 ... Reinforcement ply 7 ... Carcass ply 8 ... Bead core 9 ... Bead filler 10 ... Side reinforcement layer 11 ... Base material 12 ... Covering part 13 ... Wire rod 14 ... Polygon part 15 ... Screwing part 16 ... Single wire part 17 ... Vertical wire rod

Claims (16)

A pneumatic tire having a side reinforcing layer,
The side reinforcing layer is
A substrate including a plurality of wires arranged to extend in a specific direction at intervals,
The base material includes a polygonal portion composed of a plurality of quadrangular or hexagonal shapes that are repeatedly formed two-dimensionally,
Each polygonal part is defined by a threaded part and a single line part;
Each of the threaded portions is formed by twisting two or more wires arranged adjacent to each other among the wires,
Each said single wire part is one side of the wire which comprises the said screwing part, The pneumatic tire characterized by the above-mentioned.   2. The pneumatic tire according to claim 1, wherein one end of the side reinforcing layer is disposed between an inner surface of one end of the belt and an outer surface of the carcass ply, and the other end is disposed on a bead filler.   2. The pneumatic tire according to claim 1, wherein one end of the side reinforcing layer is disposed on the outer surface of the carcass ply in a range of 60% or less of a tire cross-section height, and the other end is disposed on a bead filler. .   The pneumatic tire according to claim 1, wherein the side reinforcing layer is disposed on an outer surface of the carcass ply between the belt and the bead filler.   3. The air according to claim 2, wherein the side reinforcing layer is disposed inside a carcass ply with the other end folded back from the outside at the bead portion and folded back from the inside to the outside at the bead portion. Tires.   3. The air according to claim 2, wherein the side reinforcing layer is disposed inside a carcass ply with the other end folded back from the inside to the outside at the bead portion and folded from the inside to the outside at the bead portion. Tires.   The pneumatic tire according to any one of claims 1 to 6, wherein each of the side reinforcing layers is formed of a vertical wire material in which the base material has a strip shape and both side portions extend in the longitudinal direction. .   The said side reinforcement layer, The said base material is provided with three or more of the said vertical wire materials, and forms a some polygon part in each division area between each said vertical wire materials, It is characterized by the above-mentioned. Pneumatic tire described in 2.   The pneumatic tire according to any one of claims 1 to 8, wherein the side reinforcing layer is capable of changing a shape of each polygonal part constituting the base material.   The pneumatic tire according to claim 9, which is dependent on claim 8, wherein the side reinforcing layer is formed by arranging polygonal portions having different shapes between the divided regions.   11. The pneumatic tire according to claim 9, wherein the side reinforcing layer is adjustable by changing a shape of the polygonal portion by changing a pitch of a screwed portion.   In the side reinforcing layer, the pitch of the threaded portions can be adjusted by changing the number of times of twisting between the wires, the inclination angle of the single wire extending from the threaded portions, or the interval between adjacent wires. The pneumatic tire according to claim 11.   The pneumatic tire according to any one of claims 1 to 12, wherein the side reinforcing layer further includes a covering portion that coats the entire base material. A pneumatic tire having a side reinforcing layer,
The side reinforcing layer is
A threaded portion formed by twisting wires together;
A single wire portion formed from one of the wires extending from the threaded portion;
Comprising a substrate formed by continuously forming a polygonal part composed of a quadrangle or a hexagon surrounded by
The pneumatic tire according to claim 1, wherein the threaded portion of the base material is formed by twisting two wire rods two or more times. Polygonal parts composed of a quadrangle or a hexagon surrounded by a twisted part formed by twisting wires together and a single wire part extending from the screwed part and formed from one side of the wire on the same plane A method for producing a pneumatic tire, comprising a step of forming a side reinforcing layer comprising a base material that is continuously formed.   Furthermore, the manufacturing method of the pneumatic tire of Claim 15 provided with the formation process of the belt which coats the whole said base material with a coating | coated part.

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