JP7028491B1 - Tread part of vehicle tires - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfactorily exhibit water repellency and grip force in a tread portion even when traveling on a snowy road or a road surface wet with rain without changing the material of a tire only by forming a tread pattern. Therefore, it is possible to safely drive not only on snowy roads but also on roads other than snowy roads, and we will provide tires that can be used all year round regardless of the season or road surface conditions. SOLUTION: The tread portion 1 of the tire of the present invention is formed in an annular shape in the circumferential direction of the tire on both sides of a tread portion 1 of the tire in the width direction and on both sides of the tread portion 1 in the width direction with a predetermined interval. The tire treads 11, 12, and 13 are provided. [Selection diagram] Fig. 1

Description

The present invention relates to a tread portion of a vehicle tire that can be used even during normal traveling and traveling on a snowy road.

In order to solve the problems caused by the contact between the tire and the road surface, the tread portion of the vehicle tire having various shapes and patterns has been conventionally known. Especially when driving on snowy roads, there are problems such as a film of water between the tires and the road surface, and snow clogging the grooves formed in the tread, causing slip accidents while the vehicle is running. rice field. Therefore, as shown in Patent Document 1, a studless tire having a tread portion having a special shape has been developed for the purpose of solving a problem when traveling on a snowy road.

Japanese Unexamined Patent Publication No. 2013-67345

However, since studless tires were developed for driving on snowy roads, when driving on dry roads that are not snowy roads, the peculiarity of the material and the special shape of the tread part are the driving performance. It was necessary to replace the tires with normal tires except in winter because it may hinder the ability of the vehicle to exert its abilities, such as causing a decrease in tires and fuel consumption. Therefore, it is necessary to purchase tires for winter and non-winter tires, which is costly and takes time and effort to replace the tires.

Therefore, in this application, we are trying to solve the above-mentioned problems, and we will make it possible to realize tires for vehicles that can be used all year round even outside winter, with a tread part that can handle snowy roads and normal road conditions. Is to be.

The present invention provides the following solutions.

The tread portion of the tire according to the first feature is a band shape formed continuously in the circumferential direction of the tire on both sides of the central portion of the tread portion of the tire in the width direction and on both sides of the tread portion in the width direction with a predetermined interval. The circumferential water absorption zone is provided with a plurality of linear protrusions densely arranged in an annular groove carved in the circumferential direction of the tire, and the distance between the circumferential water absorption zones. In the tire, one or a pair of zigzag-shaped or wavy patterned grooves whose widthwise ends communicate with both of the two circumferential water absorption zones are continuously provided in the circumferential direction of the tire to absorb water in the circumferential direction. A plurality of widthwise grooves extending in the width direction of the tread portion from the inner water absorption zone located inside the width direction of the tire in the band toward the inner end portion of the tire are provided through the arrangement interval, and the outer side in the width direction of the tire. From the outer water-absorbing zone located in the tire toward the outer end of the tire, one end of the outer water-absorbing zone side is arranged on the first-come-first-served side of the road surface, and the other end side is arranged on the second-come-first-served side of the road surface. Provide multiple tires.

According to the invention according to the first feature, the tread portion of the tire is formed in a continuous annular shape in the circumferential direction of the tire on both sides of the tread portion in the width direction and on both sides thereof via a predetermined interval in the width direction from the center portion. By providing the circumferential water absorption zone, it is possible to absorb thaw water and rainwater by using three strip-shaped circumferential water absorption zones continuously formed in a ring shape in the circumferential direction. Therefore, the slip resistance can be improved without unnecessarily increasing the grip force.

Further, since the circumferential water absorption zone is formed by a plurality of linear protrusions densely arranged in the annular groove carved in the circumferential direction of the tire, water can be collected between the road surface and the tread portion. It is possible to effectively collect in each annular groove.

Further, at the distance between the circumferential water absorption zones, one or a pair of opposite zigzag-shaped or wavy patterned grooves whose widthwise ends communicate with both of the two circumferential water absorption zones is formed in the circumferential direction of the tire. Since it is provided continuously, the grip force can be improved by the pattern groove, and the water existing at the distance between the two circumferential water absorption zones can be absorbed by the circumferential water absorption zone through the pattern groove. can. In this way, it is possible to achieve both grip force and water absorption performance, and it is possible to carry out safe operation with less slippage even on a road surface having a water layer.

Further, a plurality of widthwise grooves extending in the width direction of the tread portion from the inner water absorption zone located inside the width direction of the tire in the circumferential water absorption zone toward the inner end portion of the tire are provided through the arrangement interval. An inclination formed by arranging one end of the outer water absorption zone side on the road surface first-come-first-served side and the other end side on the road surface rear-arrival side from the outer water-absorbing zone located on the outer side in the width direction of the tire toward the outer end of the tire. Since a plurality of grooves are provided via the arrangement interval, the water absorbed by the inner water absorption zone and the outer water absorption zone can be effectively discharged from the end portion in the width direction to the outside of the tire.

The tread portion of the tire according to the second feature is a band shape formed continuously in the circumferential direction of the tire on both sides of the central portion of the tread portion of the tire in the width direction and on both sides of the tread portion in the width direction with a predetermined interval. Circumferential water absorption zones are provided, and the circumferential water absorption zones are formed by a plurality of fine grooves carved at predetermined intervals so as to form a diamond shape or a lattice shape when viewed from the front of the tire, and the circumferential water absorption zones are spaced from each other. One or a pair of opposite zigzag-shaped or wavy patterned grooves whose widthwise ends communicate with both of the two circumferential water-absorbing zones are continuously provided in the circumferential direction of the tire, and the tire is provided with one of the circumferential water-absorbing zones. A plurality of widthwise grooves extending in the width direction of the tread portion from the inner water absorption zone located inside in the width direction of the tire toward the inner end portion of the tire are provided through the arrangement interval and are located outside in the width direction of the tire. From the outer water absorption zone toward the outer end of the tire, an inclined groove formed by arranging one end of the outer water absorption zone side on the road surface first-come-first-served side and the other end side on the road surface rear-arrival side is provided through an arrangement interval. Provide multiple.

According to the invention according to the second feature, the tread portion of the tire is formed in a continuous annular shape in the circumferential direction of the tire on both sides of the tread portion in the width direction and on both sides thereof via a predetermined interval in the width direction from the center portion. By providing the circumferential water absorption zone, it is possible to absorb thaw water and rainwater by using three strip-shaped circumferential water absorption zones continuously formed in a ring shape in the circumferential direction. Therefore, the slip resistance can be improved without unnecessarily increasing the grip force.

In addition, since the circumferential water absorption zone is composed of grid-shaped or diamond-shaped fine grooves continuously carved in the circumferential direction of the tire, it is effective to use the fine grooves for water between the road surface and the tread portion. It will be possible to collect in.

Further, at the distance between the circumferential water absorption zones, one or a pair of opposite zigzag-shaped or wavy patterned grooves whose widthwise ends communicate with both of the two circumferential water absorption zones is formed in the circumferential direction of the tire. Since it is provided continuously, the grip force can be improved by the pattern groove, and the water existing at the distance between the two circumferential water absorption zones can be absorbed by the circumferential water absorption zone through the pattern groove. can. In this way, it is possible to achieve both grip force and water absorption performance, and it is possible to carry out safe operation with less slippage even on a road surface having a water layer.

Further, a plurality of widthwise grooves extending in the width direction of the tread portion from the inner water absorption zone located inside the width direction of the tire in the circumferential water absorption zone toward the inner end portion of the tire are provided through the arrangement interval. An inclination formed by arranging one end of the outer water absorption zone side on the road surface first-come-first-served side and the other end side on the road surface rear-arrival side from the outer water-absorbing zone located on the outer side in the width direction of the tire toward the outer end of the tire. Since a plurality of grooves are provided via the arrangement interval, the water absorbed by the inner water absorption zone and the outer water absorption zone can be effectively discharged from the end portion in the width direction to the outside of the tire.

The tread portion of the tire according to the third feature is the invention according to the first or second feature, and the arrangement interval of the grooves in the width direction is narrower than the arrangement interval of the inclined grooves.

According to the invention according to the third feature, since the arrangement interval of the groove in the width direction is narrower than the arrangement interval of the inclined groove, the water absorbed by the inner water absorption zone and the outer water absorption zone is effectively absorbed from the widthwise end. It can be discharged to the outside of the tire.

According to the present invention, it is not necessary to change the material of the tire only by forming the tread pattern, and the water repellency and the grip force in the tread portion are satisfactorily exhibited even when traveling on a snowy road or a road surface wet with rain. Therefore, it is possible to safely drive not only on snowy roads but also on road surfaces other than snowy roads, and it is possible to provide tires that can be used all year round regardless of the season or road surface conditions.

FIG. 1 is a partially enlarged front view showing the first embodiment of the present invention. FIG. 2 is a partially enlarged cross-sectional view taken along the line AA of FIG. FIG. 3 is a partially enlarged front view showing the second embodiment of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that this is only an example, and the technical scope of the present invention is not limited to this.

When the first embodiment of the present invention will be described with reference to FIGS. A band-shaped inner annular groove 5 and an outer annular groove 6 having the same width as the central annular groove 4 are provided on both sides of the widthwise spacing 2 and 3 having a predetermined width, and the central annular groove 4 and the inner annular groove 4 are provided. 5 and the outer annular groove 6 are arranged in an annular shape in the circumferential direction of the tire.

The central annular groove 4, the inner annular groove 5, and the outer annular groove 6 have a predetermined depth and a predetermined width, for example, a depth of 9 mm and a width of 2 to 3 cm.

In FIG. 1, the left-right direction of the paper surface indicates the width direction of the tire, and the vertical direction of the paper surface indicates the rotation direction of the tire, that is, the circumferential direction. Indicates the outside of the direction.

Further, in the central annular groove 4, the inner annular groove 5, and the outer annular groove 6, as shown in FIG. 2, a plurality of linear protrusions 11, 12, which function as one embodiment of the circumferential water absorption zone of the present invention, 13 are arranged in a densely packed state. That is, the linear protrusions 11, 12, and 13 extend vertically upward from the bottom surfaces 7, 8 and 10 of the central annular groove 4, the inner annular groove 5, and the outer annular groove 6, and the proximal end side is thick and the tip end side is thick. It has a fine tapered shape. Further, the tips of the linear protrusions 11, 12, and 13 have the same height as the ground contact surface 14 of the tire. By densely arranging the linear protrusions 11, 12, and 13 in the central annular groove 4, the inner annular groove 5, and the outer annular groove 6, respectively, the linear projections 11 arranged in the central annular groove 4 are in the central water absorption zone. As a result, the linear protrusion 12 arranged in the inner annular groove 5 functions as an inner water absorption zone, and the linear protrusion 13 formed in the outer annular groove 6 functions as an outer water absorption zone. Then, by the action of the central water absorption zone, the inner water absorption zone, and the outer water absorption zone, water between the road surface and the tread portion 1 can be effectively collected in each of the annular grooves, and the water is captured in each of the annular grooves. The collected water can be efficiently discharged from the tire to the outside through the widthwise groove 16 and the inclined groove 23, which will be described later.

The shapes of the plurality of linear protrusions 11, 12, and 13 that function as the circumferential water absorption zone include a conical shape, a triangular pyramid shape, and a cylindrical shape in addition to the shape shown in FIG. Or, it may have various shapes such as a shape like a brush bristles.

Further, the plurality of linear protrusions 11, 12, and 13 may be formed by planting the plurality of protrusions on the base, or may be formed integrally with the base material constituting the tire.

In particular, for tires that are required to be used not only in winter but throughout the year, simply increasing the grip can exert performance on snowy roads and wet roads, but grip on dry roads. Becomes a resistance, and handling performance and fuel efficiency deteriorate. In the present invention, by arranging linear protrusions 11, 12, and 13 that function as a circumferential water absorption zone in the central annular groove 4, the inner annular groove 5, and the outer annular groove 6, moisture such as thaw water is absorbed. Therefore, the slip resistance can be enhanced without strengthening the grip force too much.

Further, inside the inner annular groove 5 of the tire, the width direction groove 16 extending in the width direction of the tread portion 1 from the inner annular groove 5 toward the inner end portion 15 of the tire is provided with an inner arrangement interval 17. Multiple tires are provided. By providing the width direction groove 16 in this way, the water collected in the inner annular groove 5 can be discharged from the inner end portion 15 to the outside of the tire through the width direction groove 16.

In this embodiment, the widthwise groove 16 has a predetermined depth and a predetermined width, for example, a depth of 8 to 9 mm and a width of 3 to 4 mm. Further, the inner arrangement interval 17 is 2 cm.

Further, on the outer side of the outer annular groove 6 of the tire, one end 20 on the outer annular groove 6 side is arranged on the road surface first-come-first-served side from the outer annular groove 6 toward the outer end 18 of the tire, and the other end 21 A plurality of inclined grooves 23 having the side arranged on the rear tire side of the road surface are provided via the outer arrangement interval 22.

In this embodiment, the inclined groove 23 has a predetermined depth and a predetermined width, for example, a depth of 9 to 10 mm and a width of 6 mm. Further, the outer arrangement interval 22 is 3 cm.

In addition, when the road surface first-come-first-served side and the road surface second-arrival side in this embodiment are relatively described in FIG. 1, the road surface first-come-first-served side means the lower part in FIG. Is.

Therefore, when the inclined groove 23 is described in FIG. 1, one end 20 on the outer annular groove 6 side is located below FIG. 1, that is, on the front side in the traveling direction, and the other end 21 is located above FIG. 1, that is, on the rear side in the traveling direction. It becomes.

By providing the inclined groove 23 in this way, the water collected in the outer annular groove 6 can be discharged outward from the outer end 18 through the inclined groove 23, and the rotation of the tire during traveling can be performed. As a result, the water in the outer annular groove 6 can be efficiently discharged to the outside. Further, by making the inner arrangement interval 17 of the width direction groove 16 narrower than the outer arrangement interval 22 of the inclined groove 23 formed as described above, it is more effective to discharge water from the width direction groove 16. Can be.

Further, in each of the widthwise spacings 2 and 3 formed between the central annular groove 4, the inner annular groove 5 and the outer annular groove 6, the central annular groove 4 and the inner annular groove 5 or the outer annular groove 6 are formed. Pattern grooves 24 and 25, which communicate with each other, are continuously provided in the circumferential direction of the tire. The pattern grooves 24 and 25 in this embodiment are grooves having a zigzag shape carved into a predetermined depth and a predetermined width, for example, a depth of 6 to 7 mm and a width of 5 mm. The zigzag-shaped patterned grooves 24, 25 are provided with folded portions 26, 27 that change the direction in the width direction at predetermined intervals, and the folded portions 26, 27 are a central annular groove 4, an inner annular groove 5, or an outer annular groove. It functions as a communication unit that communicates with each of 6.

By forming the patterned grooves 24 and 25 as described above, the grip force of the tire can be improved. Further, water existing in the widthwise intervals 2 and 3 is formed in the central annular groove 4, the inner annular groove 5, or the outer annular groove 6 via the pattern grooves 24 and 25 and the folded portions 26 and 27 (communication portions). Since it can be absorbed by the linear protrusions 11, 12, and 13, which are the water absorption zones in the circumferential direction, it is possible to achieve both grip force and water absorption performance. Then, the absorbed water can be discharged outward from the widthwise groove 16 or the inclined groove 23 through the central annular groove 4, the inner annular groove 5, or the outer annular groove 6. Therefore, even on a road surface having a water layer, slipping is unlikely to occur and safe driving can be performed.

When the second embodiment of the present invention will be described with reference to FIG. 3, in the tread portion 31 of the tire, a band-shaped central water absorption zone 32 is provided at the central portion in the width direction of the tread portion 31, and a predetermined width from the central water absorption zone 32 is provided. A band-shaped inner water absorption zone 35 having the same width as the central water absorption zone 32 and an outer water absorption zone 36 are provided on both sides via the widthwise spacing 33 and 34, and the central water absorption zone 32 and the inner water absorption zone 35 are provided. The outer water absorption zone 36 is arranged in an annular shape in the circumferential direction of the tire, and functions as a circumferential water absorption zone.

The circumferential water absorption zone in Example 2 is formed by lattice-shaped or diamond-shaped grooves 37, 38, 40 continuously carved in the circumferential direction of the tire. That is, as the central water absorption zone 32, the inner water absorption zone 35, and the outer water absorption zone 36, a plurality of fine grooves 37, 38, and 40 are continuously carved at predetermined intervals in the diagonal direction so as to form a rhombus when viewed from the front of the tire. It is densely arranged. As described above, as the central water absorption zone 32, the inner water absorption zone 35, and the outer water absorption zone 36, a plurality of fine grooves 37, 38, and 40 carved so as to form a diamond shape are densely arranged to form the road surface and the tread portion 31. The water between them can be effectively collected in each of the above water absorption zones, and the water collected in each of the water absorption zones is outward from the tire via the widthwise groove 42 and the inclined groove 45 described later. Can be discharged efficiently.

In particular, for tires that are required to be used not only in winter but throughout the year, simply increasing the grip can exert performance on snowy roads and wet roads, but grip on dry roads. Becomes a resistance, and handling performance and fuel efficiency deteriorate. In this embodiment, the central water absorption zone 32, the inner water absorption zone 35, and the outer water absorption zone 36, which function as the circumferential water absorption zone, are formed by the fine grooves 37, 38, and 40 to absorb water such as thawed water. Therefore, the slip resistance can be enhanced without strengthening the grip force too much.

In this embodiment, the rhombus is formed by the fine grooves 37, 38, and 40, but in other different embodiments, the rhombus may be formed instead of the rhombus.

Further, inside the inner water absorption zone 35 of the tire, a width direction groove 42 extending in the width direction of the tread portion 31 from the inner water absorption zone 35 toward the inner end portion 41 of the tire is provided with an inner arrangement interval 43. Multiple tires are provided. By providing the width direction groove 42 in this way, the water collected in the inner water absorption zone 35 can be discharged outward from the inner end portion 41 through the width direction groove 42.

Further, on the outer side of the outer water absorption zone 36 of the tire, one end 46 on the outer water absorption zone 36 side is arranged on the first-come-first-served side of the road surface from the outer water absorption zone 36 toward the outer end portion 44 of the tire, and the other end. A plurality of inclined grooves 45 having the 47 side arranged on the road surface rear arrival side are provided via the outer arrangement interval 51. In addition, when the road surface first-come-first-served side and the road surface second-arrival side in this embodiment are relatively described in FIG. 3, the road surface first-come-first-served side means the lower part in FIG. Is.

Therefore, when the inclined groove 45 is described in FIG. 3, one end 46 on the outer water absorption zone 36 side is located in the lower part of FIG. 3 and the other end 47 is located in the upper part of FIG. By providing the inclined groove 45 in this way, the water collected in the outer water absorption zone 36 can be discharged to the outside from the outer end portion 44 through the inclined groove 45, and the running tire can be discharged. With the rotation, the water in the outer water absorption zone 36 can be efficiently discharged to the outside. Further, by making the inner arrangement interval 43 of the width direction groove 42 narrower than the outer arrangement interval 51 of the inclined groove 45 formed as described above, it is more effective to discharge water from the width direction groove 42. Can be.

Further, in each of the widthwise spacings 33 and 34 formed between the central water absorption zone 32 and the inner water absorption zone 35 and the outer water absorption zone 36, the central water absorption zone 32 and the inner water absorption zone 35 or the outer water absorption zone 36 may be formed. The pattern grooves 52 and 53 that communicate with each other are continuously provided in the circumferential direction of the tire. In the pattern grooves 52 and 53 in this embodiment, the pattern grooves 52 having a widthwise spacing 33 between the central water absorption zone 32 and the inner water absorption zone 35 are continuous diamonds formed in a pair of zigzag shapes, and the central water absorption zone. The pattern groove 53 having a widthwise spacing 34 between 32 and the outer water absorption zone 36 is corrugated.

Further, the inner end portion 54 in the width direction of the pattern groove 52 formed in the diamond shape serves as a communication portion between the inner water absorption zone 35 and the pattern groove 52, and the central end portion 55 of the pattern groove 52 forms the central water absorption zone 32 and the pattern groove 52. The curved portion 56 at the center end in the width direction of the corrugated pattern groove 53 serves as a communication portion between the central water absorption zone 32 and the pattern groove 53, and the curved portion 57 at the outer end in the width direction of the corrugated pattern groove 53 It functions as a communication portion between the outer water absorption zone 36 and the pattern groove 53.

By forming the patterned grooves 52 and 53 as described above, the grip force of the tire can be improved. Further, the water existing in the widthwise spacing 33 and 34 can be absorbed into the fine grooves 37, 38 and 40 formed as the central water absorption zone 32, the inner water absorption zone 35 or the outer water absorption zone 36 through the pattern grooves 52 and 53. Therefore, it is possible to achieve both grip power and water absorption performance. Then, the absorbed water can be discharged outward from the widthwise groove 42 or the inclined groove 45 through the central water absorption zone 32, the inner water absorption zone 35, or the outer water absorption zone 36. Therefore, even on a road surface having a water layer, slipping is unlikely to occur and safe driving can be performed.

The effects of the present invention described above can be summarized as follows.

By providing a circumferential water absorption zone formed in an annular shape in the circumferential direction of the tire on both sides of the tread portion of the tire in the width direction and on both sides of the central portion via a predetermined interval, three water absorption zones arranged in the circumferential direction are provided. The belt can be used to absorb thaw water and rainwater. Therefore, the slip resistance can be improved without unnecessarily increasing the grip force.

At this time, since the circumferential water absorption zone was formed by a plurality of linear protrusions densely arranged in the annular groove carved in the circumferential direction of the tire, the water between the road surface and the tread portion was each annular. It is possible to effectively collect in the ditch.

In addition, since the water absorption zone in the circumferential direction is formed by the grid-shaped or diamond-shaped fine grooves continuously carved in the circumferential direction of the tire, the water between the road surface and the tread portion is effectively collected by using the fine grooves. It becomes possible to do.

In addition, since the patterned grooves that communicate with the circumferential water absorption zones are continuously provided in the circumferential direction of the tire at the distance between the circumferential water absorption zones, the grip force can be improved by the patterned grooves and the circumferential water absorption zones. Water existing at intervals between the two can be absorbed into each circumferential water absorption zone through the patterned groove, and both grip force and water absorption performance can be achieved at the same time. Therefore, even on a road surface having a water layer, slipping is unlikely to occur and safe driving can be performed.

At this time, since the pattern grooves have one or a pair of zigzag shapes or wavy shapes facing each other, not only the grip force and the drainage performance but also the design can be improved.

In addition, since the width direction groove and the inclined groove are extended from the inner water absorption zone and the outer water absorption zone, respectively, the water absorbed by the circumferential water absorption zone of the inner water absorption zone and the outer water absorption zone can be effectively discharged to the outside of the tire. Can be done.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments described above. Further, the effects described in the embodiments of the present invention merely list the most suitable effects arising from the present invention, and the effects according to the present invention are limited to those described in the embodiments of the present invention. is not it.

Further, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.

The tread pattern of the present invention can be applied to various types of tires.

1, 31 Tread portion 2, 3, 33, 34 Width direction spacing 4 Central annular groove 5 Inner ring side annular groove 6 Outer ring side annular groove 11, 12, 13 Linear protrusion (circumferential water absorption zone)
15, 41 Inner ring end 16, 42 Width direction groove 17, 22, 43, 51 Arrangement interval 18, 44 Outer ring end 20, 46 One end 21, 47 Other end 23, 45 Inclined groove 24, 25, 52, 53 Pattern groove 37, 38, 40 Fine grooves (circumferential water absorption zone)

Claims (3)

A strip-shaped circumferential water absorption zone formed in a continuous annular shape in the circumferential direction of the tire is provided on both sides of the tread portion of the tire in the width direction and on both sides of the tread portion in the width direction from the center portion via a predetermined interval.
The circumferential water absorption zone is a plurality of linear protrusions densely arranged in an annular groove carved in the circumferential direction of the tire.
In the circumferential direction of the tire, one or a pair of opposite zigzag-shaped or wavy patterned grooves whose widthwise ends communicate with both of the two circumferential water-absorbing zones at the distance between the circumferential water-absorbing zones. Provided continuously in
A plurality of widthwise grooves extending in the width direction of the tread portion from the inner water absorption zone located inside the width direction of the tire in the circumferential water absorption zone toward the inner end portion of the tire are provided at intervals of arrangement. From the outer water absorption zone located on the outer side in the width direction of the tire toward the outer end of the tire, one end of the outer water absorption zone side is arranged on the road surface first-come-first-served side and the other end side is arranged on the road surface rear-arrival side. A plurality of inclined grooves are provided via the arrangement interval.
The tread part of the tire is characterized by that. A strip-shaped circumferential water absorption zone formed in a continuous annular shape in the circumferential direction of the tire is provided on both sides of the tread portion of the tire in the width direction and on both sides of the tread portion in the width direction from the center portion via a predetermined interval.
The circumferential water absorption zone is formed by a plurality of fine grooves carved at predetermined intervals so as to form a rhombus or a lattice shape when viewed from the front of the tire.
In the circumferential direction of the tire, one or a pair of opposite zigzag-shaped or wavy patterned grooves whose widthwise ends communicate with both of the two circumferential water-absorbing zones at the distance between the circumferential water-absorbing zones. Provided continuously in
A plurality of widthwise grooves extending in the width direction of the tread portion from the inner water absorption zone located inside the width direction of the tire in the circumferential water absorption zone toward the inner end portion of the tire are provided at intervals of arrangement. From the outer water absorption zone located on the outer side in the width direction of the tire toward the outer end of the tire, one end of the outer water absorption zone side is arranged on the road surface first-come-first-served side and the other end side is arranged on the road surface rear-arrival side. A plurality of inclined grooves are provided via the arrangement interval.
The tread part of the tire is characterized by that. The tread portion of a tire according to claim 1 or 2, wherein the arrangement interval of the widthwise grooves is narrower than the arrangement interval of the inclined grooves.

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