JP6423653B2 - tire - Google Patents

Description

  The present invention relates to a tire incorporating an RF (Radio Frequency) tag.

  2. Description of the Related Art Tires incorporating an RF tag having a memory, an antenna, and the like for reading and writing data such as tire manufacturing management, shipping management, and usage history management are known (see, for example, Patent Document 1).

JP 2008-265750 A

However, in Patent Document 1, the RF tag is disposed so as to be adjacent to a stiffener (bead reinforcement member (stiffener)) that is a highly rigid member. A stiffener is a rubber part having a high hardness and is deformed by rolling of a tire. For this reason, a large distortion occurs near the boundary between the stiffener and the RF tag adjacent to each other, and the RF tag is easily distorted.
The present invention provides a tire configured so that distortion is unlikely to occur in a built-in RF tag.

The tire according to the present invention is a tire including an RF tag or an RF tag structure formed by covering the RF tag with a covering rubber, and the RF tag or the RF tag structure has a maximum tire width. In order not to contact the stiffener that reinforces the bead part on the side of the bead part from the position, the reinforcing layer is provided so as to be located on the outer side in the tire width direction with respect to the stiffener and provided on the side surface side of the tire. are arranged so as to be sandwiched between the cord reinforcing layer, said reinforcing layer than is formed by the code layer or rubber layer, it can be prevented contact between the stiffener and the RF tag by the reinforcing layer, the RF tag with a built Because it is difficult to produce distortion in the tire and the cord reinforcement layer is provided, the reader / writer can be used because the RF tag can be placed close to the tire surface. It is possible to improve the communication performance in reading and writing information to the RF tag, and it becomes possible to protect the RF tag when the obstacle collides with the tire surface. Furthermore, since the RF tag or the RF tag structure and the cord reinforcement layer are brought into contact with each other, the tire may be manufactured by attaching the RF tag or the RF tag structure to the cord reinforcement layer at the time of production. Tire productivity is also improved.
The RF tag or the RF tag component is disposed between the tip of the cord reinforcing layer and the tip of the reinforcing layer, the tip located on the inner side in the tire radial direction, and the rim flange separation point. Since it is provided so as not to come into contact with the tip and the tip of the reinforcing layer, there is no RF tag in the region where the distortion is the smallest on the bead part side without the tip of the cord reinforcing layer and the tip of the reinforcing layer and the push-up from the rim. Thus, the RF tag structure is arranged, and the built-in RF tag is less likely to be distorted.
In addition, since the elastic modulus of the covering rubber of the RF tag structure is larger than the elastic modulus of the rubber that forms the cord reinforcing layer and the reinforcing layer, the force due to the strain generated in the tire by the covering rubber is effective. So that the built-in RF tag is less likely to be distorted.
Further, since the reinforcing layer is formed of the rubber layer, the rubber layer effectively absorbs the force caused by the strain generated inside the tire, so that it is difficult for the built-in RF tag to be distorted.

FIG. 1 is a half sectional view of a tire (Embodiment 1). The principal part expanded sectional view of a tire (embodiment 1). The principal part expanded sectional view of a tire (embodiment 2). The principal part expanded sectional view of a tire (embodiment 3). The principal part expanded sectional view of a tire (embodiment 4). The principal part expanded sectional view of a tire (embodiment 5).

  Hereinafter, the present invention will be described in detail through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included in the invention. It is not necessarily essential to the solution, but includes a configuration that is selectively adopted.

Embodiment 1
As shown in FIG. 1, the tire 1 according to the first embodiment includes a bead core 2 and a carcass layer 3, and the carcass layer 3 includes at least one carcass ply 4. The carcass ply 4 has a main body portion 5 extending in a toroidal shape between the pair of bead cores 2; 2 and extends outward from the tire radial direction so as to wrap around the bead core 2 while extending from both ends of the main body portion 5 and surrounding the bead core 2. And a folded portion 6 that is folded back.
The carcass ply 4 is a plate-like member that is covered with rubber so that a plurality of cords are arranged in parallel, for example, and is provided so that the plurality of cords extend radially around the rotation center axis of the tire. A metal chafer 7, an inner organic fiber chafer 8, and an outer organic fiber chain so as to wrap the bead core 2 at the radially inner end of the tire in the main body portion 5 of the carcass ply 4 and the outer side (the tire surface side) of the folded portion 6. The fur 9 is disposed so as to overlap.
The metal chafer 7 is formed of, for example, a plate-like member covered with rubber so that a plurality of metal cords are arranged in parallel, and the inner organic fiber chafer 8 and the outer organic fiber chafer 9 are, for example, a plurality of organic fibers. It is formed by a plate-like member covered with rubber so that fiber cords are arranged in parallel. The metal cord is a stranded wire formed of, for example, steel, brass, copper, alloy, etc., and the organic fiber cord is formed of organic fibers such as polyamide resin, polyethylene naphthalate resin, polyethylene terephthalate resin, etc. It is a stranded wire. The cord of the carcass ply 4 or the belt ply described later is, for example, a metal cord or an organic fiber cord.

Reference numeral 10 denotes a stiffener extending from the bead core 2 to the outer side in the tire radial direction along the main body portion 5 of the carcass ply 4. The stiffener 10 is located on the inner side in the tire radial direction and is disposed between the main body part 5 and the turn-up part 6 of the carcass ply 4 in close contact with the hard stiffener part 11 and the outer side in the tire radial direction. And a soft stiffener portion 12 disposed in close contact with the main body portion 5 and the folded portion 6 of the carcass ply 4.
The hard stiffener portion 11 is formed of a rubber having a Shore A hardness of 70 degrees or higher, for example, and the soft stiffener portion 12 is a rubber having a lower hardness than the hard stiffener portion 11, such as a rubber having a Shore A hardness of 58 to 68 degrees. It is formed by.

  Reference numeral 13 denotes a ply end reinforcing rubber portion (hat rubber) that is provided so as to wrap the tip portion of the folded portion 6 of the carcass ply 4 and reinforces the tip portion of the folded portion 6.

A belt layer 21 is provided outside the carcass layer 3 in the tire radial direction, and the belt layer 21 is configured by laminating at least two belt plies 22. The belt ply 22 is, for example, a plate-like member covered with rubber so that a plurality of cords are arranged in parallel. The cords embedded in the belt ply 22 intersect with the tire equatorial plane C at a predetermined angle. In addition, at least two belt plies 22;
A tread 23 is disposed on the outer side of the belt layer 21 in the tire radial direction. A plurality of main grooves 24 extending in the tire circumferential direction on the outer surface of the tread 23 in the tire radial direction and the main groove 24 crossing the main groove 24 are not illustrated. A plurality of lateral grooves are formed.

  In FIG. 1, 20 is a rim, 18 is a rim flange, 31 is an inner liner, 32 is a side rubber constituting the outer surface of the side wall portion 33, and 34 is a bead portion 35 that covers the bead core 2 and is a ring-shaped reinforcing portion. It is a rubber that constitutes.

As shown in FIG. 1 and FIG. 2, the tire 1 of the first embodiment is arranged such that the RF tag 50 does not contact the stiffener 10 that reinforces the bead portion 35 on the bead portion 35 side from the tire maximum width position W. The RF tag 50 is disposed in contact with the tire lumen (cavity) H side of the cord reinforcement layer X and is disposed in contact with the tire lumen H side of the cord reinforcement layer X. Further, a reinforcing layer Y formed of a cord layer is disposed on the tire lumen H side of the RF tag 50, and the reinforcing layer Y is located on the outer side in the tire width direction than the hard stiffener portion 11.
The cord reinforcing layer X and the reinforcing layer Y are, for example, plate-like members covered with rubber so that a plurality of cords are arranged in parallel.
The RF tag 50 is a tag in which a storage medium using a non-contact IC chip and an antenna are embedded in a plate, and data can be read and written using a reader / writer not shown.

  In the tire 1 of the first embodiment, the cord reinforcement layer X is an outer cord reinforcement layer positioned on the tire outer surface (tire side surface) side in the direction A (tire width direction A) along the tire rotation center axis. The reinforcing layer Y formed by the organic fiber chafer 9 is an inner side as an inner cord reinforcing layer (cord layer) located on the tire lumen H side in the direction A (tire width direction A) along the tire rotation central axis. The organic fiber chafer 8 is formed, and the RF tag 50 is disposed so as to be sandwiched between the outer organic fiber chafer 9 and the inner organic fiber chafer 8.

The distortion at the time of running of the tire 1 is relatively large in the region outside the tire radial direction from the tire maximum width position W, and is small in the region inside the tire radial direction from the tire maximum width position W. According to the tire 1 of the first embodiment, the RF tag 50 is disposed closer to the bead portion 35 than the tire maximum width position W, so that the built-in RF tag 50 is less likely to be distorted. Furthermore, according to the tire of the first embodiment, since the RF tag 50 is arranged so as not to contact the stiffener 10 that reinforces the bead portion 35, it becomes difficult to receive the force from the stiffener 10, and the built-in RF tag 50 Distortion is less likely to occur.
Further, since the RF tag 50 and the stiffener 10 are not in contact with each other, the inner organic fiber chafer 8 as the reinforcing layer Y positioned outside the hard stiffener portion 11 in the tire width direction is provided. As compared with the case where the stiffener and the RF tag are provided in contact with each other, the built-in RF tag 50 is less likely to be distorted.
Further, since the outer organic fiber chafer 9 functioning as the cord reinforcing layer X is provided, the RF tag 50 can be disposed close to the front surface (side surface) side of the tire 1, and a reader / writer not shown is used. Communication performance when reading / writing information from / to the RF tag 50 can be improved, and the RF tag 50 can be protected when an obstacle collides with the surface (side surface) of the tire 1.
Further, since the RF tag 50 is configured to contact the outer organic fiber chafer 9 as the cord reinforcing layer, the tire 1 may be manufactured by attaching the RF tag 50 to the cord reinforcing layer during production. Productivity is also improved.

  Further, in the tire 1 of the first embodiment, the RF tag 50 is a tire among the tip Xt of the outer organic fiber chafer 9 as the cord reinforcing layer X and the tip Yt of the inner organic fiber chafer 8 as the reinforcing layer Y. The tip Xt of the outer organic fiber chafer 9 (cord reinforcing layer X) and the inner organic fiber chafer 8 are disposed between the tip Xt of the outer organic fiber chafer 9 positioned radially inward and the rim flange separation point 19. The reinforcing layer Y is provided so as not to contact the tip Yt. Therefore, the RF tag 50 is disposed in a region where the distortion is smallest on the bead portion 35 side without the tip Xt of the outer organic fiber chafer 9 and the tip Yt of the inner organic fiber chafer 8 or the push-up from the rim 20. As a result, the RF tag 50 is less likely to be distorted.

The “rim flange separation point” is a point on the outermost side in the tire radial direction where the tire 1 is in contact with the rim flange 18 of the rim 20 when the pneumatic tire 1 is assembled to the rim 20.
The state in which the tire 1 is assembled to the rim 20 means a state in which the tire 1 is assembled to a regular rim defined in the standard with air pressure corresponding to the maximum load defined in the standard.
The “tire maximum width position” refers to the maximum width position in the cross section in the tire width direction in a no-load state in which the tire is assembled to a normal rim, filled with a normal internal pressure, and no load is applied.
“Regular rim” means “standard rim” defined in JATMA, “Design Rim” defined in TRA, or “Measuring Rim” defined in ETRTO.
“Regular internal pressure” means “maximum air pressure” defined by JATMA, the maximum value of “TIRE LOAD LIMITS AT VARIOUS COLDINFLATION PRESSURES” defined by TRA, or “INFLATION PRESSURES” defined by ETRTO.

Embodiment 2
As shown in FIG. 3, in the tire 1 of the second embodiment, the cord reinforcing layer X includes an outer organic fiber chafer 9 as an outer cord reinforcing layer located on the tire outer surface (tire side surface) side and the tire lumen. An inner organic fiber chafer 8 serving as an inner cord reinforcing layer located on the H side, and a reinforcing layer Y is provided so as to wrap around the tip of the folded portion 6 of the carcass ply 4 and the tip of the folded portion 6 Formed by a ply end reinforcing rubber portion (hat rubber) 13 as a rubber layer that reinforces the fiber, and the RF tag 50 is disposed so as to be sandwiched between the inner organic fiber chafer 8 and the ply end reinforcing rubber portion 13 It was.
In the case of the tire 1 of the second embodiment, the effects described in the first embodiment can be obtained, and the reinforcing layer Y is formed by the ply end reinforcing rubber portion 13 that is a rubber layer, so that the ply end reinforcement adjacent to the stiffener 10 is provided. Since the rubber portion 13 effectively absorbs the force from the stiffener 10, the RF tag 50 is less likely to be distorted.
In this case, the elastic modulus of the rubber forming the ply end reinforcing rubber portion 13 is made smaller than the elastic modulus of the rubber forming the stiffener 10, so that the ply end reinforcing rubber portion 13 adjacent to the stiffener 10 becomes the stiffener 10. Therefore, the RF tag 50 is less likely to be distorted.

Embodiment 3
In the tire 1 according to the third embodiment, as shown in FIG. 4, the cord reinforcing layer X is formed by a metal chafer 7 as an outer cord reinforcing layer located on the tire outer surface (tire side surface) side, and the reinforcing layer Y is formed by a ply end reinforcing rubber part (hat rubber) 13 as a rubber layer provided so as to wrap around the tip part of the folded part 6 of the carcass ply 4 and reinforcing the tip part of the folded part 6, and the RF tag 50 The metal chafer 7 and the ply end reinforcing rubber portion 13 are arranged so as to be sandwiched between them.
In the case of the tire 1 of the third embodiment, the effects described in the second embodiment can be obtained, and the metal chafer 7 is used as the cord reinforcing layer X, so that the metal cord embedded in the metal chafer 7 is replaced with the RF tag 50. Therefore, the communication performance of the RF tag 50 can be improved.

Embodiment 4
In the tire 1 of the fourth embodiment, as shown in FIG. 5, the cord reinforcing layer X is formed by a metal chafer 7 as an outer cord reinforcing layer located on the tire outer surface (tire side surface) side, and the reinforcing layer Y is formed by the folded portion 6 of the carcass ply 4 as the inner cord layer (code layer), and the RF tag 50 is disposed so as to be sandwiched between the metal chafer 7 and the folded portion 6 of the carcass ply 4. The configuration was as follows.
In the case of the tire 1 according to the fourth embodiment, the effects described in the first embodiment can be obtained, and the metal cord embedded in the metal chafer 7 and the carcass ply 4 can be made RF by using the cord of the carcass ply 4 as a metal cord. Since the tag 50 can be used as an antenna, the communication performance of the RF tag 50 can be improved.

Embodiment 5
In the tire 1 of the fifth embodiment, as shown in FIG. 6, a configuration in which the RF tag structure 50A configured by covering the RF tag 50 with the covering rubber 51 is built in the same manner as in the first embodiment, or Although not shown in the figure, the built-in configuration is the same as in Embodiments 2 to 4 described above.
According to the tire 1 of the fifth embodiment, since the RF tag 50 is covered with the covering rubber 51, the force due to the distortion generated inside the tire 1 can be effectively absorbed by the covering rubber 51. It becomes difficult for the tag 50 to be distorted.
In particular, by making the elastic modulus of the covering rubber 51 of the RF tag structure 50A larger than the elastic modulus of the rubber forming the cord reinforcing layer X and the reinforcing layer Y, the force due to the strain generated inside the tire 1 is covered. Since the rubber 51 can absorb more effectively, the RF tag 50 is less likely to be distorted.

  In each of the above-described embodiments, the cord reinforcing layer X includes the side rubber 32 formed of rubber having relatively low hardness on the outer side in the tire width direction, and the reinforcing layer Y on the outer side in the tire width direction (the tire lumen H side). ) Is provided with a soft stiffener portion 12 formed of rubber having a relatively low hardness, so that the rubber having a relatively low hardness absorbs the force caused by the distortion generated in the tire 1, It becomes difficult for force to be transmitted and the RF tag 50 is less likely to be distorted.

  Moreover, in each embodiment, the stiffener 10 provided with the hard stiffener part 11 and the soft stiffener part 12 is used, the reinforcement layer Y and the soft stiffener part 12 are made to adjoin, and the reinforcement layer Y and the hard stiffener part 11 are not contacted. Thus, the force due to the strain generated in the tire 1 is not easily transmitted to the RF tag 50, and the RF tag 50 is less likely to be distorted.

1 tire, 10 stiffener, 19 rim flange separation point, 35 bead,
50 RF tag, 50A RF tag structure, 51 coated rubber, W tire maximum width position,
X cord reinforcing layer, tip of Xt cord reinforcing layer, Y reinforcing layer, tip of Yt reinforcing layer.

Claims (4)

An RF tag or a tire incorporating an RF tag structure in which the RF tag is covered with a coating rubber,
The RF tag or the RF tag component is provided on the outer side in the tire width direction of the stiffener so as not to contact the stiffener that reinforces the bead portion on the bead portion side of the tire maximum width position. And a cord reinforcement layer provided so as to be located on the side surface side of the tire ,
The reinforcing layer, the tire characterized by a kite is formed by the code layer or rubber layer.   The RF tag or the RF tag component is disposed between the tip of the cord reinforcing layer and the tip of the reinforcing layer located on the inner side in the tire radial direction and the rim flange separation point, The tire according to claim 1, wherein the tire is provided so as not to contact a tip of the reinforcing layer.   The tire according to claim 1 or 2, wherein the elastic modulus of the rubber covering the RF tag component is larger than that of the rubber forming the cord reinforcing layer and the reinforcing layer. The tire according to any one of claims 1 to 3, wherein the reinforcing layer is formed of a rubber layer.

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