WO2013015346A1 - タイヤ - Google Patents
タイヤ Download PDFInfo
- Publication number
- WO2013015346A1 WO2013015346A1 PCT/JP2012/068928 JP2012068928W WO2013015346A1 WO 2013015346 A1 WO2013015346 A1 WO 2013015346A1 JP 2012068928 W JP2012068928 W JP 2012068928W WO 2013015346 A1 WO2013015346 A1 WO 2013015346A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sipe
- land portion
- circumferential
- tire
- width direction
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—Asymmetric patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1376—Three dimensional block surfaces departing from the enveloping tread contour
- B60C11/1384—Three dimensional block surfaces departing from the enveloping tread contour with chamfered block corners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0344—Circumferential grooves provided at the equatorial plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0348—Narrow grooves, i.e. having a width of less than 4 mm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0372—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane with particular inclination angles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
- B60C2011/0383—Blind or isolated grooves at the centre of the tread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0386—Continuous ribs
- B60C2011/0388—Continuous ribs provided at the equatorial plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0386—Continuous ribs
- B60C2011/0393—Narrow ribs, i.e. having a rib width of less than 8 mm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface
Definitions
- the present invention relates to a tire including a rib-like land portion extending in the tire circumferential direction, and a circumferential sipe extending in the tire circumferential direction is formed in the rib-like land portion.
- a tread pattern in which a circumferential sipe extending in the tire circumferential direction is formed on a rib-like land portion extending in the tire circumferential direction is used.
- a tire in which a circumferential sipe extending in the tire circumferential direction is formed on a circumferential sipe provided at a central portion in the tread width direction (for example, Patent Document 1).
- One end of the circumferential sipe terminates in the rib-like land portion, and the other end of the circumferential sipe communicates with an inclined groove that is inclined with respect to the tire circumferential direction.
- one end of the inclined groove terminates in the rib-like land portion, and the other end of the inclined groove communicates with a circumferential groove adjacent to the rib-like land portion.
- the tire according to the first feature includes a land portion that is partitioned by a circumferential groove extending in the tire circumferential direction and extends in the tire circumferential direction.
- a circumferential sipe extending in the tire circumferential direction is formed in the land portion.
- the land portion extends from one side portion in the tread width direction of the land portion and extends from a first inclined groove that is inclined with respect to the tire circumferential direction and the other side portion in the tread width direction of the land portion.
- a second inclined groove that is inclined with respect to the tire circumferential direction is formed. The first inclined grooves and the second inclined grooves are alternately formed in the tire circumferential direction.
- the circumferential sipe includes a first circumferential sipe formed from an end of the first inclined groove on a land portion side to an intermediate portion in a tread width direction of the second inclined groove, and a tread of the second inclined groove.
- a second circumferential sipe extending from an intermediate portion in the width direction along an extension line of the first circumferential sipe. The second circumferential sipe terminates in the land portion.
- FIG. 1 is a partial plan development view of a tread of a pneumatic tire 10 according to the first embodiment.
- FIG. 2 is a partially enlarged plan view of the tread of the pneumatic tire 10 according to the first embodiment.
- FIG. 3 is a partial plan development view of the tread of the pneumatic tire 310 according to the second embodiment.
- FIG. 4 is a partially enlarged plan view of the tread of the pneumatic tire 310 according to the second embodiment.
- FIG. 5 is a partially enlarged plan view of a tread of the pneumatic tire 310 according to the second embodiment.
- FIG. 1 is a partial plan development view of a tread of the pneumatic tire 10 according to the first embodiment.
- a circumferential groove 20 and a circumferential groove 30 are formed in the pneumatic tire 10.
- the pneumatic tire 10 may be filled with an inert gas such as nitrogen gas instead of air.
- the thin line part means the area
- the pneumatic tire 10 is provided with a rib-like land portion 40 extending in the tire circumferential direction D C.
- two rib-like land portions 40 are formed on both sides of the tread width direction DT with respect to the tire equator line CL.
- a plurality of inclined grooves 100 and a plurality of circumferential sipes 200 are formed in the rib-like land portion 40.
- Circumferential sipe 200 is a straight sipe extending in the tire circumferential direction D C.
- the groove width of the circumferential sipe 200 is narrower than the groove width of the inclined groove 100.
- FIG. 2 is a partially enlarged plan view of the tread of the pneumatic tire 10.
- the rib-like land portion 40 extends from one side in the tread width direction D T of the rib-like land portion 40, the first inclined groove 110 which are inclined with respect to the tire circumferential direction D C If, extends from the other side in the tread width direction D T of the rib-like land portion 40, and the second inclined groove 160 which are inclined with respect to the tire circumferential direction D C is formed as an inclined groove 100.
- a first inclined groove 110 and the second inclined groove 160 are formed alternately in the tire circumferential direction D C.
- the rib-shaped land portion 40 includes a first circumferential sipe formed from an end portion of the first inclined groove 110 on the rib-shaped land portion 40 side to an intermediate portion of the second inclined groove 160 in the tread width direction DT . 210 and a third circumferential sipe 260 formed from the end of the second inclined groove 160 on the rib-like land portion 40 side to the middle portion of the first inclined groove 110 in the tread width direction DT . 200 is formed.
- the rib-like land portion 40 includes a second circumferential sipe extending from an intermediate portion of the second inclined groove 160 in the tread width direction DT along an extension line of the first circumferential sipe 210. 220 is formed. The second circumferential sipe 220 terminates in the rib-like land portion 40. Further, a fourth circumferential sipe 270 is formed on the rib-like land portion 40, extending from an intermediate portion in the tread width direction DT of the first inclined groove 110 along the extension line of the third circumferential sipe 260. The fourth circumferential sipe 270 terminates in the rib-like land portion 40.
- First circumferential sipe 210, the second circumferential sipes 220, the third circumferential sipes 260 and the fourth circumferential sipes 270 but extend parallel to the tire circumferential direction D C approximately, the tire circumferential direction D C (Tire It may be inclined by about 5 to 10 degrees with respect to the equator line CL).
- the rib-like land portion 40 in which the first circumferential sipe 210, the second circumferential sipe 220, the third circumferential sipe 260, and the fourth circumferential sipe 270 are formed is defined by the Japan Automobile Tire Association (JATMA) or the like.
- JTMA Japan Automobile Tire Association
- the basic drainage of the rainwater entering the grounding surface is ensured by the first inclined groove 110 and the second inclined groove 160 whose angle formed with the tread width direction DT is a low angle, and the first circumferential direction
- the sipe 210 and the third circumferential sipe 260 can remove rainwater that has entered the rib-like land portion 40 from the ground contact surface.
- first circumferential sipe 210 and the third circumferential sipe 260 are formed at the same position in the tread width direction DT , that is, the first circumferential sipe 210 and the third circumferential sipe 260 because it is formed to be linear in the direction D C, it can be further enhanced dewatering effect.
- the linear 2nd circumferential sipe 220 and the 4th circumferential sipe 270 which are terminated in a rib-shaped land part are formed. Further, the first circumferential sipes 210 and second circumferential sipes 220 are formed on a straight line extending in the tire circumferential direction D C, similarly to the third circumferential sipes 260 fourth circumferential sipes 270, the circumferential It is formed on a straight line extending in the direction D C. For this reason, the water removal (water absorption) effect in the rib-like land portion 40 can be further enhanced.
- the second circumferential sipe 220 and the fourth circumferential sipe 270 do not necessarily have to be formed in the rib-like land portion 40.
- the circumferential sipe 200 does not necessarily have to be linear, and for example, it may have a shape meandering somewhat.
- FIG. 3 is a partial plan development view of the tread of the pneumatic tire 310 according to the second embodiment.
- a circumferential groove 320 and a circumferential groove 330 are formed in the pneumatic tire 310.
- the circumferential groove 320 and the circumferential groove 330 extend along the tire circumferential direction Tc.
- the pneumatic tire 310 may be filled with an inert gas such as nitrogen gas instead of air.
- the thin line part means the area
- the inside of the tread width direction Tw is the tread grounding surface from the thin line portion.
- both ends of the tread contact surface in the tread width direction Tw indicate both ends of the contact range in the tread width direction Tw when the tire is in contact with the road surface.
- the state where the tire is in contact with the road surface indicates, for example, a state where the tire is mounted on a normal rim and a normal internal pressure and a normal load are applied.
- a regular rim refers to a standard rim in the applicable size specified in the 2008 Yearbook of JATMA (Japan Automobile Tire Association).
- the normal internal pressure is the air pressure corresponding to the maximum load capacity of JATMA Year Book 2008 version
- the normal load is the load corresponding to the maximum load capacity when JATMA Year Book 2008 version single wheel is applied. .
- the standards governing these are determined by industry standards that are valid in the region where the tire is produced or used. For example, in the United States, “The Steel and Rim Association Inc. Year Book”, and in Europe, “The European Tire and Rim Technical Standards Manual”.
- the pneumatic tire 310 includes an outer land portion 340 extending in the tire circumferential direction Tc and a center land portion 350 extending in the tire circumferential direction Tc by being partitioned into the circumferential groove 320 and the circumferential groove 330.
- two outer land portions 340 are formed on both sides of the tread width direction Tw with reference to the tire equator line CL.
- the center land portion 350 is formed on the inner side in the tread width direction Tw than the outer land portion 340.
- the center land portion 350 is provided at a position including the tire equator line CL. That is, the center land portion 350 is provided on the tire equator line CL.
- the outer land portion 340 constitutes a “land portion” defined in the claims
- the center land portion 350 constitutes a “center land portion” defined in the claims.
- a plurality of inclined grooves 400 and a plurality of circumferential sipes 500 are formed in the outer land portion 340.
- the circumferential sipe 500 is a linear sipe extending in the tire circumferential direction Tc.
- the sipe has a groove width that can be closed when the land portion is grounded.
- the sipe has a groove width of 1.5 mm or less.
- the groove width of the sipe may be 1.5 mm or more. Note that the groove width of the circumferential sipe 500 is narrower than the groove width of the inclined groove 400.
- the width direction sipes 600 are periodically formed at predetermined intervals in the tire circumferential direction Tc.
- the width direction sipe 600 extends in the tread width direction Tw.
- the width direction sipe 600 is a linear sipe extending so as to be inclined with respect to the tread width direction Tw.
- FIG. 4 is a partially enlarged plan view of the tread of the pneumatic tire 310.
- the outer land portion 340 includes a first inclined groove 410 extending from one side portion in the tread width direction Tw of the outer land portion 340 and inclined with respect to the tire circumferential direction Tc.
- a second inclined groove 420 extending from the other side portion of the portion 340 in the tread width direction Tw and inclined with respect to the tire circumferential direction Tc is formed as the inclined groove 400.
- the first inclined grooves 410 and the second inclined grooves 420 are alternately formed in the tire circumferential direction Tc.
- At least one of the inclination angle ⁇ 1 of the first inclined groove 410 with respect to the tire circumferential direction Tc or the inclination angle ⁇ 2 of the second inclined groove 420 with respect to the tire circumferential direction Tc is within a range of 20 degrees to 60 degrees. Is preferred. In the second embodiment, a case where both the inclination angle ⁇ 1 and the inclination angle ⁇ 2 are in the range of 20 degrees to 60 degrees will be described as an example.
- the inclination angle ⁇ 1 formed by the direction A1 in which the first inclined groove 410 extends and the straight line parallel to the tire circumferential direction Tc is in the range of 20 degrees to 60 degrees.
- the direction A1 in which the first inclined groove 410 extends refers to the center of the tire circumferential direction Tc on the side in the tread width direction Tw of the outer land portion 340 of the first inclined groove 410 and the first inclination in the tread surface view. It is indicated by a straight line connecting the end point located on the outermost land portion 340 side of the groove 410.
- channel 410 becomes a straight line along the tire circumferential direction Tc, let this edge point be the center of the tire circumferential direction Tc of an edge part.
- the inclination angle ⁇ 2 formed by the direction A2 in which the second inclined groove 420 extends and the straight line parallel to the tire circumferential direction Tc is in the range of 20 degrees to 60 degrees.
- the direction A2 in which the second inclined groove 420 extends refers to the center in the tire circumferential direction Tc on the side in the tread width direction Tw of the outer land portion 340 of the second inclined groove 420 and the second inclination in the tread surface view. It is indicated by a straight line connecting the end point located on the outermost land portion 340 side of the groove 420.
- channel 420 becomes a straight line in the tire circumferential direction Tc, this edge point is made into the center of the tire circumferential direction Tc of an edge part.
- the outer land portion 340 includes a first circumferential sipe 510 formed from an end of the first inclined groove 410 on the outer land portion 340 side to an intermediate portion in the tread width direction Tw of the second inclined groove 420;
- a second circumferential sipe 520 extending along an extension line of the first circumferential sipe 510 is formed as a circumferential sipe 500 from an intermediate portion in the tread width direction Tw of the second inclined groove 420.
- the second circumferential sipe 520 terminates in the outer land portion 340.
- the outer land portion 340 has a first tread groove 410 that is tilted with respect to the tire circumferential direction Tc and a first circumferential sipe 510 that extends in the tire circumferential direction Tc.
- An acute angle portion is formed.
- the first circumferential sipe 510 and the second circumferential sipe 520 extend substantially parallel to the tire circumferential direction Tc, but about 5 to 10 degrees with respect to the tire circumferential direction Tc (tire equator line CL). It may be inclined. Further, the outer land portion 340 in which the first circumferential sipe 510 and the second circumferential sipe 520 are formed has a normal load on the pneumatic tire 310 set to a normal internal pressure defined by the Japan Automobile Tire Association (JATMA) or the like. In a state where is added, it is preferably provided in a region of 60% of the tread width including the tire equator line CL.
- JTMA Japan Automobile Tire Association
- FIG. 5 is a partially enlarged plan view of the tread of the pneumatic tire 310.
- the center land portion 350 includes a first width direction sipe 610 extending from one side portion in the tread width direction Tw of the center land portion 350 and terminating in the center land portion 350, and A second width direction sipe 620 extending from the other side portion of the center land portion 350 in the tread width direction Tw and terminating in the center land portion 350 is formed as a width direction sipe 600.
- one end portion 310 a opens into the circumferential groove 330 adjacent to one of the center land portions 350, and the other end portion 310 b ends in the center land portion 350.
- one end portion 320 a opens in the circumferential groove 330 adjacent to the other of the center land portion 350, and the other end portion 320 b ends in the center land portion 350.
- the second width direction sipe 620 preferably extends along an extension line of the first width direction sipe 610.
- the first width direction sipe 610 and the second width direction sipe 620 extend in substantially parallel directions, but may extend in different directions.
- the angle formed by the straight line along the tread width direction Tw and the direction in which the first width direction sipe 610 extends is preferably not less than 0 degrees and less than 60 degrees with respect to the tread width direction Tw.
- the angle formed by the straight line along the tread width direction Tw and the direction in which the second width direction sipe 620 extends is preferably 0 degrees or more and less than 60 degrees with respect to the tread width direction Tw.
- first width direction sipe 610 and the second width direction sipe 620 terminate in the center land portion 350 outside the tire equator line CL in the tread width direction Tw.
- the end portion 310b of the first width direction sipe 610 and the end portion 320b of the second width direction sipe 620 are located outside the tire equator line CL in the tread width direction Tw. That is, a separation portion where the first width direction sipe 610 and the second width direction sipe 620 are separated from each other is formed on the tire equator line CL.
- the outer land portion 340 is formed by the first inclined grooves 410 and the second inclined grooves 420 that are alternately formed in the tire circumferential direction Tc.
- the basic drainage of rainwater that has entered is secured.
- the linear first circumferential sipe 510 and the second circumferential sipe 520 communicating with these inclined grooves 400 are formed, the outer land portion 340 is formed.
- the water removal (water absorption) effect in can also be enhanced.
- the outer land portion 340 is not divided in the tread width direction Tw, the rigidity of the outer land portion 340 can be secured.
- the inclination angle ⁇ 1 of the first inclined groove 410 with respect to the tire circumferential direction Tc and the inclination angle ⁇ 2 of the second inclined groove 420 with respect to the tire circumferential direction Tc are within a range of 20 degrees or more and 60 degrees or less. It is. According to such a pneumatic tire 310, the corner portion formed in the outer land portion 340 is difficult to be turned by the first inclined groove 410 and the second inclined groove 420 at the time of tire rolling, so that the ground contact property is improved. It becomes possible.
- the first inclined grooves 410 and the second inclined grooves 420 are alternately formed in the tire circumferential direction Tc, so that the inclination angles ⁇ 1 to ⁇ 2 are low angles (for example, 45 to 60).
- the rigidity of the outer land portion 340 can be secured not only in the case of degrees) but also in the case of a slightly high angle (for example, in the range of 30 to 45 degrees).
- the outer land portion 340 is formed with a first circumferential sipe 510 communicating with the first inclined groove 410 and a second circumferential sipe 520 communicating with the second inclined groove.
- ⁇ 2 is a slightly high angle (for example, a range of 30 degrees or more and 45 degrees or less)
- a water removal (water absorption) effect on the surface of the outer land portion 340 can be secured. That is, the water removal effect can be secured while securing the rigidity of the outer land portion 340.
- the drainage performance and the handling stability can be achieved at a high level.
- a linear second circumferential sipe 520 that terminates in the outer land portion 340 is formed.
- the first circumferential sipe 510 and the second circumferential sipe 520 are formed at the same position in the tread width direction Tw. That is, the first circumferential sipe 510 and the second circumferential sipe 520 are formed to be linear in the tire circumferential direction Tc. For this reason, the water removal (water absorption) effect in the outer land portion 340 can be further enhanced.
- the width direction sipe 600 is periodically formed in the tire circumferential direction Tc by the first width direction sipe 610 and the second width direction sipe 620.
- the second width direction sipe 620 extends along an extension line of the first width direction sipe 610.
- first width direction sipe 610 and the second width direction sipe 620 terminate in the center land portion 350 outside the tire equator line CL in the tread width direction Tw. That is, in the center land portion 350, a separation portion where the first width direction sipe 610 and the second width direction sipe 620 are separated is formed on the tire equator line CL. According to the pneumatic tire 310, it is possible to prevent the rigidity of the center land portion 350 from being excessively reduced, and thus it is possible to ensure steering stability.
- the circumferential sipe 500 does not necessarily have to be linear, and for example, may have a shape that meanders somewhat.
- the width direction sipe 600 does not necessarily have to be linear, for example, it may have a shape meandering somewhat.
- the second width direction sipe 620 is formed so as to extend on the extension line of the first width direction sipe 610.
- the second width direction sipe 620 is the same as the first width direction sipe 610. It may be formed at a position shifted by a predetermined interval in the tire circumferential direction Tc from the extension line.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
以下において、第1実施形態に係るタイヤ(空気入りタイヤ)について、図面を参照しながら説明する。なお、以下の図面の記載において、同一または類似の部分には、同一または類似の符号を付している。ただし、図面は模式的なものであり、各寸法の比率などは現実のものとは異なることに留意すべきである。
図1は、第1実施形態に係る空気入りタイヤ10のトレッドの一部平面展開図である。図1に示すように、空気入りタイヤ10には、周方向溝20及び周方向溝30が形成される。なお、空気入りタイヤ10には、空気に代えて窒素ガスなどの不活性ガスを充填してもよい。また、図1において、細線部分は、正規内圧及び正規荷重時には、路面に接地しない領域を意味している。
図2は、空気入りタイヤ10のトレッドの一部拡大平面図である。図2に示すように、リブ状陸部40には、リブ状陸部40のトレッド幅方向DTにおける一方の側部から延びるとともに、タイヤ周方向DCに対して傾斜する第1傾斜溝110と、リブ状陸部40のトレッド幅方向DTにおける他方の側部から延びるとともに、タイヤ周方向DCに対して傾斜する第2傾斜溝160とが、傾斜溝100として形成される。第1傾斜溝110と第2傾斜溝160とは、タイヤ周方向DCにおいて交互に形成される。
空気入りタイヤ10によれば、タイヤ周方向DCにおいて交互に形成された第1傾斜溝110と第2傾斜溝160とによって、リブ状陸部40に入り込んだ雨水の基本的な排水性が確保される。さらに、これらの傾斜溝に連通する直線状の第1周方向サイプ210及び第3周方向サイプ260が形成されるため、リブ状陸部40における除水(吸水)効果も高めることができる。また、リブ状陸部40は、トレッド幅方向DTに分断されないため、リブ状陸部40の剛性も確保できる。
上述したように、本発明の実施形態を通じて本発明の内容を開示したが、この開示の一部をなす論述及び図面は、本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなる。
以下において、第2実施形態に係るタイヤ(空気入りタイヤ)について、図面を参照しながら説明する。なお、以下の図面の記載において、同一または類似の部分には、同一または類似の符号を付している。ただし、図面は模式的なものであり、各寸法の比率などは現実のものとは異なることに留意すべきである。
図3は、第2実施形態に係る空気入りタイヤ310のトレッドの一部平面展開図である。図3に示すように、空気入りタイヤ310には、周方向溝320及び周方向溝330が形成される。周方向溝320及び周方向溝330は、タイヤ周方向Tcに沿って延びる。なお、空気入りタイヤ310には、空気に代えて窒素ガスなどの不活性ガスを充填してもよい。また、図3において、細線部分は、正規内圧及び正規荷重時には、路面に接地しない領域を意味している。言い換えると、細線部分よりもトレッド幅方向Tw内側がトレッド接地面である。
図4は、空気入りタイヤ310のトレッドの一部拡大平面図である。図4に示すように、外側陸部340には、外側陸部340のトレッド幅方向Twにおける一方の側部から延びるとともに、タイヤ周方向Tcに対して傾斜する第1傾斜溝410と、外側陸部340のトレッド幅方向Twにおける他方の側部から延びるとともに、タイヤ周方向Tcに対して傾斜する第2傾斜溝420とが、傾斜溝400として形成される。第1傾斜溝410と第2傾斜溝420とは、タイヤ周方向Tcにおいて交互に形成される。
図5は、空気入りタイヤ310のトレッドの一部拡大平面図である。図5に示すように、センター陸部350には、センター陸部350のトレッド幅方向Twにおける一方の側部から延びるとともに、センター陸部350内において終端している第1幅方向サイプ610と、センター陸部350のトレッド幅方向Twにおける他方の側部から延びるとともに、センター陸部350内において終端している第2幅方向サイプ620が、幅方向サイプ600として形成される。
第2実施形態に係る空気入りタイヤ310によれば、タイヤ周方向Tcにおいて交互に形成された第1傾斜溝410と第2傾斜溝420とによって、外側陸部340に入り込んだ雨水の基本的な排水性が確保される。さらに、これらの傾斜溝400(第1傾斜溝410及び第2傾斜溝420)に連通する直線状の第1周方向サイプ510及び第2周方向サイプ520が形成されているため、外側陸部340における除水(吸水)効果も高めることができる。また、外側陸部340は、トレッド幅方向Twに分断されないため、外側陸部340の剛性も確保できる。
上述したように、本発明の実施形態を通じて本発明の内容を開示したが、この開示の一部をなす論述及び図面は、本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなる。
Claims (6)
- タイヤ周方向に延びる周方向溝によって区画され、タイヤ周方向に延びる陸部を備え、タイヤ周方向に延びる周方向サイプが前記陸部に形成されたタイヤであって、
前記陸部には、
前記陸部のトレッド幅方向における一方の側部から延びるとともに、タイヤ周方向に対して傾斜する第1傾斜溝と、
前記陸部のトレッド幅方向における他方の側部から延びるとともに、タイヤ周方向に対して傾斜する第2傾斜溝と
が形成され、
前記第1傾斜溝と前記第2傾斜溝とは、タイヤ周方向において交互に形成され、
前記周方向サイプは、
前記第1傾斜溝の陸部側の端部から、前記第2傾斜溝のトレッド幅方向における中間部まで形成された第1周方向サイプと、
前記第2傾斜溝のトレッド幅方向における中間部から、前記第1周方向サイプの延長線上に沿って延びる第2周方向サイプとを含み、
前記第2周方向サイプは、前記陸部内において終端している
ことを特徴とするタイヤ。 - 前記第1傾斜溝のタイヤ周方向に対する傾斜角度、又は、前記第2傾斜溝のタイヤ周方向に対する傾斜角度の少なくとも一方は、20度以上60度以下の範囲内である
ことを特徴とする請求項1に記載のタイヤ。 - 前記周方向サイプは、前記第2傾斜溝のリブ状陸部側の端部から、前記第1傾斜溝のトレッド幅方向における中間部まで形成された第3周方向サイプを含む
ことを特徴とする請求項1に記載のタイヤ。 - 前記周方向サイプは、直線状である
ことを特徴とする請求項1に記載のタイヤ。 - 前記陸部よりもトレッド幅方向内側に形成されるセンター陸部を更に備え、
前記センター陸部は、タイヤ赤道線を含む位置に設けられており、
前記センター陸部には、トレッド幅方向に延びる幅方向サイプが形成されており、
前記幅方向サイプは、
前記センター陸部のトレッド幅方向における一方の側部から延びるとともに、前記センター陸部内において終端している第1幅方向サイプと、
前記センター陸部のトレッド幅方向における他方の側部から延びるとともに、前記センター陸部内において終端している第2幅方向サイプとを含み、
前記第1幅方向サイプと、前記第2幅方向サイプとは、タイヤ赤道線よりもトレッド幅方向外側において終端している
ことを特徴とする請求項1に記載のタイヤ。 - 前記第2幅方向サイプは、前記第1幅方向サイプの延長線上に沿って延びる
ことを特徴とする請求項5に記載のタイヤ。
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US14/234,802 US9434212B2 (en) | 2011-07-26 | 2012-07-26 | Tire |
EP12818065.0A EP2738019B1 (en) | 2011-07-26 | 2012-07-26 | Tire |
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JP2011163363A JP5659101B2 (ja) | 2011-07-26 | 2011-07-26 | タイヤ |
JP2011-163363 | 2011-07-26 | ||
JP2011253833A JP5659129B2 (ja) | 2011-11-21 | 2011-11-21 | タイヤ |
JP2011-253833 | 2011-11-21 |
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US (1) | US9434212B2 (ja) |
EP (1) | EP2738019B1 (ja) |
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Cited By (3)
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JP2015024757A (ja) * | 2013-07-26 | 2015-02-05 | 株式会社ブリヂストン | 空気入りラジアルタイヤ |
CN104842718A (zh) * | 2014-02-14 | 2015-08-19 | 住友橡胶工业株式会社 | 充气轮胎 |
US20160144665A1 (en) * | 2013-07-12 | 2016-05-26 | The Yokohama Rubber Co., Ltd. | Pneumatic Tire |
Families Citing this family (8)
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WO2015060127A1 (ja) * | 2013-10-22 | 2015-04-30 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP1541051S (ja) * | 2015-02-18 | 2015-12-28 | ||
JP6405284B2 (ja) | 2015-04-17 | 2018-10-17 | 住友ゴム工業株式会社 | 空気入りタイヤ |
USD799412S1 (en) * | 2016-12-21 | 2017-10-10 | The Goodyear Tire & Rubber Company | Tire |
JP6900758B2 (ja) * | 2017-04-14 | 2021-07-07 | 住友ゴム工業株式会社 | タイヤ |
US20190061433A1 (en) * | 2017-08-23 | 2019-02-28 | The Goodyear Tire & Rubber Company | Tread for a pneumatic tire |
JP6949654B2 (ja) * | 2017-10-13 | 2021-10-13 | Toyo Tire株式会社 | 空気入りタイヤ |
JP7099021B2 (ja) * | 2018-04-10 | 2022-07-12 | 住友ゴム工業株式会社 | タイヤ |
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CN103717413A (zh) | 2014-04-09 |
US9434212B2 (en) | 2016-09-06 |
EP2738019B1 (en) | 2016-09-07 |
EP2738019A4 (en) | 2015-02-18 |
EP2738019A1 (en) | 2014-06-04 |
CN103717413B (zh) | 2016-04-27 |
US20140150941A1 (en) | 2014-06-05 |
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