WO2015004913A1 - タイヤ - Google Patents
タイヤ Download PDFInfo
- Publication number
- WO2015004913A1 WO2015004913A1 PCT/JP2014/003648 JP2014003648W WO2015004913A1 WO 2015004913 A1 WO2015004913 A1 WO 2015004913A1 JP 2014003648 W JP2014003648 W JP 2014003648W WO 2015004913 A1 WO2015004913 A1 WO 2015004913A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- groove
- circumferential
- tread
- grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
- B60C11/1259—Depth of the sipe
- B60C11/1263—Depth of the sipe different within the same sipe
-
- 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
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
-
- 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
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C11/125—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern arranged at the groove bottom
-
- 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
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
- B60C2011/0334—Stiffness
-
- 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
-
- 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
- B60C2011/0346—Circumferential grooves with zigzag shape
-
- 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
- B60C2011/0353—Circumferential grooves characterised by width
-
- 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
-
- 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
- B60C2011/0362—Shallow grooves, i.e. having a depth of less than 50% of other grooves
-
- 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
- B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by width
-
- 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
- B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
-
- 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 that can suppress uneven wear on a tread surface while maintaining steering stability and drainage on a wet road surface.
- Patent Document 1 is intended to further suppress uneven wear that occurs before and after the tire circumferential direction of the sipe while maintaining improvement in wet performance by a shallow groove (lateral groove) and a sipe formed in the bottom of the groove.
- a tire is disclosed in which all shallow grooves (lateral grooves) and sipes are inclined in the same direction with respect to the tire axial direction.
- an object of the present invention is to provide a tire capable of suppressing uneven wear around the corner of a tread tread block while maintaining steering stability and drainage on a wet road surface.
- the gist of the present invention is as follows. (1) In the tire according to the present invention, a plurality of land portions are defined on the tread surface of the tread by a plurality of circumferential grooves extending in the tire circumferential direction, and a plurality of lateral grooves crossing the land portions are disposed in each land portion.
- the transverse grooves have an arrangement in which the transverse grooves adjacent to each other in the tire circumferential direction do not overlap each other when the transverse grooves are projected onto the tire equatorial plane, and each transverse groove is inclined with respect to the tread width direction.
- the lateral groove has a sipe extending inward in the tire radial direction from the groove bottom, and the sipe has a shallow bottom portion having a shallow depth only in the central region, and at least the In the vicinity of the boundary between the central area and the side area, Wherein the spaced apart points to place the shallow bottom part.
- the tire of the present invention having such a configuration, since the difference in rigidity between the corner portion of the block defined by the circumferential groove and the lateral groove and the periphery thereof is reduced, uneven wear around the corner portion of the block can be suppressed. it can. In addition, a sufficient drainage path can be secured in the lateral groove to maintain the drainability of the tread, and at the same time, the rigidity in the tire circumferential direction of the land portion can be secured and the steering stability on the wet road surface can be maintained.
- the “sipe depth” in the present invention means the length of the sipe extending in the tire radial direction.
- the sipe depth in the side region is equal to or greater than the maximum sipe depth in the central region. According to this configuration, sufficient wet performance can be ensured over a long period until the late use of the tire.
- a separation distance between the boundary portion and the origin of the shallow bottom is 1.0 mm or greater and 3.0 mm or less along the extending direction of the lateral groove at the position where the shallow bottom is disposed. Preferably there is. According to this arrangement, uneven wear of the tread can be more reliably reduced.
- the tread has three or more circumferential grooves on the tread surface, and the width of the circumferential grooves is other circumferential grooves than the pair of outermost circumferential grooves in the tread width direction. Small is preferable. According to this configuration, the land portions between the circumferential grooves can support each other in the tread width direction and the rigidity is increased, so that the steering stability on the wet road surface can be improved.
- the lateral groove of the land portion adjacent to one of the other circumferential grooves and the lateral groove of the land portion adjacent to the other have an opening position to the other circumferential groove in the tire circumferential direction. It is preferable to do the same. According to this configuration, the drainage efficiency is increased, and the drainage performance on the wet road surface can be further improved.
- FIG. 1 is a partial development view showing a tread surface of a tire according to an embodiment of the present invention. It is an enlarged view of the horizontal groove shown in FIG.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG.
- FIG. 4 is a sectional view taken along line BB in FIG. 3. It is a partial expanded view which shows the tread surface of a comparative example tire.
- FIG. 1 is a partial development view showing a tread surface S of a tire 10 according to an embodiment of the present invention.
- the tire 10 includes a carcass made of an organic fiber cord or a steel cord ply straddling a pair of bead portions, a belt made of a steel cord layer on the outer side in the tire radial direction of the carcass, With tread.
- two land portions 6 are defined by a plurality of circumferential grooves 1 (three in the illustrated example) extending in the tire circumferential direction (Y direction in FIG. 1).
- Each of 6 is provided with a plurality of lateral grooves 2 that traverse the land portion 6 and extend in an inclined manner with respect to the tread width direction. That is, a plurality of blocks b6 are defined on the tread surface 6 by the three circumferential grooves 1 and the plurality of lateral grooves 2.
- the lateral groove 2 is a lateral groove adjacent to each other in the tire circumferential direction when the lateral groove 2 is projected onto the tire equatorial plane CL (in the illustrated example, the lateral groove adjacent to the tire circumferential direction within the same land portion 6). 2), and each lateral groove 2 extends by changing its extending direction via two boundary portions f that are close to both ends in the tread width direction of the lateral groove 2. .
- the boundary portion f is a bent shape having a corner, but may be a shape that forms a gentle arc.
- the circumferential groove 1 has a zigzag shape in the illustrated example, but may have another shape such as a linear shape or a wave shape.
- the lateral groove 2 extends at an inclination with respect to the tread width direction, and the central area 2C.
- the side area 2E extends from the both ends of the tire toward the circumferential groove 1 with a smaller inclination angle with respect to the tire width direction than the central area 2C.
- the side area 2E expands toward the circumferential groove 1 It is important to have That is, the inclination angle ⁇ of the lateral groove 2 in the side area 2E is smaller than the inclination angle ⁇ with respect to the tread width direction in the central area 2C, and in the side area 2E, it is smaller than the groove width W 1 in the boundary portion f.
- the groove width in the side region 2E of the lateral groove 2 gradually increases from the boundary portion f to the end edge e.
- the groove width is changed in at least a part of the side region 2E so that W 1 ⁇ W 2 It is good.
- the inclination angle of the lateral groove 2 thus inclined with respect to the tread width direction is changed at the boundary portion f, and the inclination angle ⁇ in the side region 2E is changed to the same inclination angle in the central region 2C.
- the corner portion G of the block b 6 defined by the lateral groove 2 and the circumferential groove 1 does not become an extremely acute angle, so that the rigidity difference in the block b 6 is reduced.
- uneven wear that can occur around the corner G of the block b 6 of the tread surface S can be suppressed.
- the groove width of the side region 2E is inferior to the lateral groove that is inclined with respect to the tread width direction and extends in a straight line by making the groove width widen from the boundary portion f toward the circumferential groove 1. No drainage can be ensured.
- the rigidity in the tire width direction can be increased. it can.
- FIG. 3 shows a cross-sectional view of the horizontal groove 2 taken along a plane (indicated by the AA line in FIG. 1) perpendicular to the extending direction of the horizontal groove 2.
- the lateral groove 2 extends from the tread tread S toward the inner side in the tire radial direction (Z direction in FIG. 3) with a depth d 2 , and further from the groove bottom of the lateral groove 2 toward the inner side in the tire radial direction. It has a sipe 3 which is a narrow cut having a length d 3 .
- a sipe 3 which is a narrow cut having a length d 3 .
- the sipe 3 extends linearly toward the inner side in the tire radial direction, but other shapes such as a zigzag shape and a wave shape that bend at least once on one side and the other side in the tire circumferential direction. It can also be set as the shape.
- FIG. 4 shows a cross section of such a transverse groove 2 taken along the center line of the sipe 3 (shown by a line BB in FIG. 3). The transverse groove 2 is perpendicular to the extending direction of the transverse groove 2. The figure seen from the direction which becomes.
- the sipe 3 extends along the transverse groove 2 over its entire length, and in the vicinity of the boundary portion f between the central region 2C and the side region 2E, a portion having a shallow sipe depth (hereinafter referred to as a shallow bottom portion p). Have).
- the lateral groove 2 includes the sipe 3 extending inward in the tire radial direction from the groove bottom of the lateral groove 2, and the sipe 3 has a shallow depth only in the central region 2C of the lateral groove. It is important to arrange the shallow bottom portion p having the bottom portion p and having the shallow bottom starting point pst separated from the boundary portion f in the vicinity of the boundary portion f between the central region 2C and the side region 2E.
- the lateral grooves 2 can ensure a relatively large capacity drainage path on the tread tread S, and in particular, drainage from the initial use to the middle of the tire is maintained.
- the sipe 3 extending from the groove bottom of the lateral groove 2 is exposed to the tread tread S, and the drainage performance of the tread is continued. maintain.
- the shallow bottom portion p is set in the side region 2E. It is not provided and is provided only in the central area 2C.
- the groove width of the side region 2E of the lateral groove 2 is widened from the boundary portion f toward the circumferential groove 1 for the purpose of ensuring drainage.
- the rigidity of the block b 6 in the vicinity of the side region 2E tends to be lower than the rigidity in the central region 2C, and a rigidity step is generated at the boundary portion f.
- the tire according to the present invention is provided with the shallow bottom portion p in the vicinity of the boundary portion f.
- the shallow bottom portion p is provided only in the central region 2C from the viewpoint of ensuring drainage performance in the later stage of use of the tire.
- the shallow bottom portion p is provided in the range of the central area 2C and in the vicinity of the boundary portion f, and the rigidity of the land portion 6 is secured, thereby widening the opening to the circumferential groove 1 and improving the drainage performance.
- the steering stability on the wet road surface can be maintained.
- the rigidity is relatively low in the vicinity of the side region 2E of the block b 6, due to stiffness in the central region 2C of the block b 6 is relatively high, the rigidity step is formed in the boundary portion f corresponding to these boundaries It will be.
- the boundary portion f is also an inflection point at which the extending direction of the lateral groove 2 changes, when a value in the tire circumferential direction or the tire width direction is input to the tread, the boundary portion f is blocked from the starting point.
- the b 6 is deformed, and the chipping and peeling of the block b 6 are likely to occur. Therefore, according to the configuration of the present invention, the shallow starting point pst is arranged away from the boundary part f, thereby reducing the rigidity step and avoiding the occurrence of such block chipping and baldness.
- the “near the boundary portion f” refers to a range of 15% of the extending length of the horizontal groove 2 around the boundary portion f along the horizontal groove 2. That is, along the lateral groove 2, a point separated by 7.5% of the extending length of the lateral groove 2 from the boundary portion f to the circumferential groove 1 side, and the same length on the opposite side of the circumferential groove 1. A region between points separated by a minute.
- the position of the shallow bottom portion p is specified by the portion of the shallow bottom portion p having the shallowest sipe depth.
- the center of the extending range of the shallow groove part p is defined as the shallowest part of the sipe depth. Furthermore, as shown in FIGS.
- the separation distance dis between the boundary portion f and the shallow bottom starting point pst is 1.0 mm or greater and 3.0 mm or less along the extending direction of the lateral groove 2 at the position where the shallow bottom portion p is disposed.
- the thickness is 1.0 mm or more, an increase in the rigidity step at the boundary portion f can be suitably suppressed.
- the thickness is 3.0 mm or less, the rigidity of the end portion in the tire width direction of the block b 6 is increased. It is possible to suppress the reduction and to ensure uneven wear resistance more reliably.
- the sipe depth in the side region 2E is preferably equal to or greater than the maximum sipe depth in the central region 2C.
- the sipe depth of the side region 2E is increased. This is because by increasing the size, the sipe 3 can be easily opened in the circumferential groove 1, drainage into the circumferential groove 1 can be sufficiently performed, and excellent wet performance can be ensured.
- the shape of the bottom of the shallow bottom portion p may be other shapes such as a triangle, a square, or a rectangle, and only in the vicinity of the boundary portion f. Alternatively, it may be provided in other regions as required.
- the tread tread surface S has three or more circumferential grooves 1, and the width of the circumferential grooves 1 is larger than that of the pair of circumferential grooves 1 (width Ws) on the outermost side in the tread width direction.
- the other circumferential grooves 1 (extending along the tire equatorial plane in FIG. 1) (width Wc) are preferably small. That is, in FIG. 1, it is preferable that Wc ⁇ Ws.
- the groove width wc of the other circumferential groove 1 is preferably 3 mm or more and 5 mm or less from the viewpoint of reliably obtaining the mutual support effect of the land portions 6.
- the lateral groove 2 of the land portion 6 adjacent to one of the other circumferential grooves 1 other than the outermost circumferential groove 1 in the tread width direction and the lateral groove 2 of the land portion 6 adjacent to the other are provided. It is preferable that the opening position to the other circumferential groove 1 is the same in the tire circumferential direction. According to this configuration, for example, as in the comparative example tire shown in FIG. 5, the opening position of the lateral groove 22 extending to the one land portion 26 and the other land portion 26 with respect to the circumferential groove 21 extending along the tire equatorial plane. Compared with the case where is staggered, the drainage efficiency of the entire land portion 6 is improved. That is, the drainage performance on the wet road surface can be further improved.
- the inclination angle ⁇ in the central region 2C of the lateral groove 2 is preferably 30 ° or more and 35 ° or less from the viewpoint of achieving both the rigidity of the block b 6 and the drainage of the tread.
- the inclination angle ⁇ is too large, the drainage of the tread is improved, but the rigidity of the block in the tread width direction is lowered, and uneven wear tends to occur when the vehicle turns.
- the inclination angle ⁇ is too small, the drainage of the tread becomes insufficient and the edge component in the tread width direction tends to be insufficient.
- tilt angle (beta) in the side region 2E of the horizontal groove 2 is 5 degrees or less.
- the boundary part f of the horizontal groove 2 is located in the range of 5% or more and 20% or less of the extending length of the horizontal groove 2 from the edge e in the extending direction of the horizontal groove 2, so that the drainage property of the tread is improved. It is preferable from the viewpoint of suppressing uneven wear around the corners of the block while ensuring.
- the transverse grooves 2, the groove width W 1 at the boundary f, the ratio of the groove width W 2 at the edges e, W 1 / W 2 is 0.5 It is preferable that it is 0.7 or more.
- the depth d 2 of the transverse grooves 2, and the maximum depth d 3 of the sipe 3 when the depth of the circumferential grooves 1 and d 1, if the range of d 1> d 3 ⁇ d 2, as appropriate It can be changed.
- a shoulder groove 4 and a short sipe extending along the tread width direction are formed in a land portion defined by a pair of circumferential grooves 1 on the outermost side in the tire width direction and a ground contact end of the tread.
- the tire according to the present invention is not limited to such a tread pattern.
- invention example tires and comparative example tires were prototyped according to the specifications shown in Table 1, tire uneven wear resistance, steering stability on wet road surface (wet handling stability) ) And drainage.
- Invention Example Tire 1 has a tread pattern shown in FIG. That is, when the lateral grooves 2 are projected onto the tire equatorial plane, the lateral grooves 2 adjacent to each other in the tire circumferential direction are arranged so as not to overlap each other, and each lateral groove 2 includes a central region 2C extending obliquely with respect to the tread width direction, The side region 2E extends from both ends of the central region 2C toward the circumferential groove 1 with a smaller inclination angle with respect to the tread width direction than the central region 2C. The side region 2E expands toward the circumferential groove 1. It has a groove width.
- the lateral groove 2 includes a sipe extending inward in the tire radial direction from the groove bottom of the lateral groove 2, and the sipe is separated from the boundary portion f between the central region 2C and the side region 2E by 0.5 mm in the central region 2C.
- the comparative example tire 1 is the same as the invention example tire 1 except that it does not have a sipe shallow bottom p.
- the comparative example tire 2 is the same as the example tire 1 except that each lateral groove 2 overlaps with each other adjacent lateral grooves in the tire circumferential direction when projected onto the tire equatorial plane.
- the comparative example tire 3 is the same as the example tire 1 except that the groove width does not increase toward the circumferential groove 1 in the lateral region 2E of the lateral groove.
- the comparative example tire 4 is the same as the example tire 1 except that the separation distance dis is 9.0 mm and the shallow bottom portion p is not in the vicinity of the boundary portion f.
- the comparative example tire 5 is the same as the inventive example tire 1 except that the shallow bottom starting point pst is on the boundary portion f.
- Invention Example Tire 2 is the same as Invention Example Tire 1 except that the separation distance dis is 1.0 mm.
- Invention Example Tire 3 is the same as Invention Example Tire 1 except that the separation distance dis is 3.0 mm.
- Invention Example Tire 4 is the same as Invention Example Tire 1 except that the separation distance dis is 3.5 mm.
- “W 2 / W 1 ” indicates “ ⁇ ” when the ratio exceeds 1 and “X” when the ratio is 1 or less.
- the vicinity of the boundary part f is the range of 15% of the extending length of the horizontal groove centering on the boundary part along the horizontal groove.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
そこで、本発明の目的は、ウェット路面における操縦安定性及び排水性を維持しつつ、トレッド踏面のブロックの角部周辺における偏摩耗を抑制し得るタイヤを提供することにある。
(1)本発明のタイヤは、トレッドの踏面に、タイヤ周方向に延びる複数本の周溝によって複数の陸部を区画し、各陸部に、該陸部を横断する複数の横溝を配設してなるタイヤであって、前記横溝は、該横溝をタイヤ赤道面に投影した際に、タイヤ周方向に隣接する横溝相互が重ならない配列を有し、各横溝は、トレッド幅方向に対し傾斜して延びる中央域と、該中央域の両端から前記周溝に向かって前記中央域に比しトレッド幅方向に対する傾斜角度を小さくして延びる側域とからなり、該側域は、前記周溝に向かって拡大する溝幅を有し、前記横溝は、溝底からタイヤ径方向内側に延びるサイプを具え、該サイプは、前記中央域のみに深さの浅い浅底部を有し、且つ少なくとも前記中央域と側域との境界部の近傍に、該境界部から浅底の起点を離間して浅底部を配置することを特徴とする。
なお、本発明でいう「サイプの深さ」とは、サイプのタイヤ径方向への延在長さを意味する。
このタイヤ10のトレッド踏面Sには、タイヤ周方向(図1のY方向)に延びる複数本の周溝1(図示例では3本)によって2つの陸部6が区画され、この2つの陸部6の各々には、該陸部6を横断し、トレッド幅方向に対し傾斜して延びる複数の横溝2が配設されている。すなわち、3本の周溝1と複数の横溝2とによって、トレッド踏面6に複数のブロックb6が区画されている。また、横溝2は、該横溝2をタイヤ赤道面CLに投影した際に、タイヤ周方向に隣接する横溝2相互(図示例では、同一の陸部6内でタイヤ周方向に隣接している横溝2の相互)が重ならない配列を有し、さらに、各横溝2では、横溝2のトレッド幅方向の両端近くに有する2つの境界部fを介して、その延在方向を変化させて延びている。なお、本実施形態では、境界部fを、角を有する屈曲形状としているが、緩やかな弧となる形状とすることもできる。また、周溝1は、図示例ではジグザグ状であるが、例えば、直線状や波状などの他の形状であってもよい。
本発明に係るタイヤでは、さらに、かように傾斜する横溝2のトレッド幅方向に対する傾斜角度を境界部fにて変化させ、上記の側域2Eにおける傾斜角度βを、中央域2Cにおける同傾斜角度αよりも小さく調整することにより、例えば、横溝2と周溝1とによって区画されるブロックb6の角部Gが極端に鋭角とならないので、ブロックb6内での剛性差が低減され、その結果、トレッド踏面Sのブロックb6の角部G周辺に生じ得る偏摩耗を抑制することがきる。
なお、図1及び2に示す横溝2がそうであるように、横溝2の側域2Eにおける傾斜角度βは、中央域2Cにおける傾斜角度αよりも小さければ、該横溝の一方側の側域2Eと、他方側の側域2Eとで、傾斜角度βの大きさが異なっていてもよい。
かような横溝2について、図4には、横溝2をサイプ3の中心線に沿って切断した際の断面(図3に、B-B線で示す)を、横溝2の延在方向に垂直となる方向からみた図を示している。このように、サイプ3は、横溝2に沿ってその全長に亘って延在し、中央域2Cと側域2Eとの境界部fの近傍に、サイプ深さの浅い部分(以下、浅底部pという)を有する。
横溝2によって、トレッド踏面S上に比較的容量の大きな排水経路を確保できるので、特に、タイヤの使用初期から中期にかけての排水性が維持される。また、タイヤの使用中期から後期にかけては、トレッドの陸部6が摩耗して横溝2が消滅すると、横溝2の溝底から延びるサイプ3がトレッド踏面Sに露出して、トレッドの排水性を引き続き維持する。このように、陸部が摩耗して横溝2が消滅した後は、当該サイプを特に周溝1に開口し易くして排水性を維持する必要があるため、浅底部pを側域2Eには設けず、中央域2Cにのみ設ける。
そこで、本発明の構成に従い、浅底の起点pstを境界部fから離間して配置することにより、剛性段差を緩和し、かようなブロックの欠けやもげの発生を回避することができる。
また、ここでは、浅底部pの、サイプ深さが最も浅い部分をもって浅底部pの位置を特定する。浅溝部pのサイプ深さが一律の場合は、該浅溝部pの延在範囲の中心をもって、サイプ深さが最も浅い部分とする。
さらに、図1及び2に示すように、境界部fが角を有して屈曲している場合は、その屈曲点をもって境界部fの中心とし、境界部fが緩やかな弧である場合は、曲率半径が最も小さくなる点をもって境界部fの中心とする。
なお、浅底部pの底の形状は、図4に示すような半円状とする他にも、三角形、正方形または長方形等の他の形状とすることもでき、また、境界部fの近傍のみならず、必要に応じて、その他の領域に設けてもよい。
このとき、上記その他の周溝1の溝幅wcは、3mm以上5mm以下であることが、陸部6相互の支え合いの効果を確実に得る観点から好ましい。
また、横溝2の側域2Eにおける傾斜角度βは、5°以下であることが好ましい。
同様に、排水性を十分に確保する観点から言えば、横溝2の、境界部fにおける溝幅W1と、端縁eにおける溝幅W2との比、W1/W2は0.5以上0.7以下であることが好ましい。
また、横溝2の深さd2と、サイプ3の最大深さd3とは、周溝1の深さをd1としたとき、d1>d3≧d2の範囲であれば、適宜変更できるものである。
発明例タイヤ及び比較例タイヤ(ともに、タイヤサイズは、275/70R22.5)を表1に示す仕様のもと試作し、タイヤの耐偏摩耗性、ウェット路面における操縦安定性(ウェット操縦安定性)及び排水性を評価した。
比較例タイヤ1は、サイプの浅底部pを有しないこと、以外は発明例タイヤ1と同様である。
比較例タイヤ2は、各横溝2が、タイヤ赤道面に投影した際に、タイヤ周方向に隣接する横溝相互と重複すること、以外は発明例タイヤ1と同様である。
比較例タイヤ3は、横溝の側域2Eにて、周溝1に向かって溝幅が拡大しないこと、以外は発明例タイヤ1と同様である。
比較例タイヤ4は、離間距離disが9.0mmであり、浅底部pが境界部fの近傍にないこと、以外は発明例タイヤ1と同様である。
比較例タイヤ5は、浅底の起点pstが境界部f上にあること、以外は発明例タイヤ1と同様である。
発明例タイヤ2は、離間距離disが1.0mmであること、以外は発明例タイヤ1と同様である。
発明例タイヤ3は、離間距離disが3.0mmであること、以外は発明例タイヤ1と同様である。
発明例タイヤ4は、離間距離disが3.5mmであること、以外は発明例タイヤ1と同様である。
各供試タイヤを適用リム(JATMA YEAR BOOK等に記載されている、適用サイズにおける標準リム)に組み付け、内圧900kPaを付与した後、テスト車両のフロント軸に装着し、テストコースを40000km走行させた。そして、偏摩耗が最も著しいブロックの体積を測定し、摩耗量の逆数からタイヤの耐偏摩耗性を評価した。評価結果を表1に示す。なお、表1では、従来例タイヤ1を100とする指数標記とし、数値の大きい方が耐偏摩耗性に優れていることを示す。
各供試タイヤを上記の状態とし、テスト車両のフロント軸に装着して、ウェット路面(水深2mm)のコース上にて、プロのテストドライバーによるフィーリング試験を行った。評価結果を表1に示す。表1では、従来例タイヤ1を100とする指数標記とした。数値の大きい方が、ウェット操縦安定性に優れていることを示す。
2、22:横溝
2C:中央域
2E:側域
3:サイプ
4:ショルダー溝
5:短尺サイプ
6:陸部
10、20:タイヤ
G:ブロックの角部
e:横溝の端縁
f:横溝の境界部
p:サイプの浅底部
Claims (5)
- トレッドの踏面に、タイヤ周方向に延びる複数本の周溝によって複数の陸部を区画し、各陸部に、該陸部を横断する複数の横溝を配設してなるタイヤであって、
前記横溝は、該横溝をタイヤ赤道面に投影した際に、タイヤ周方向に隣接する横溝相互が重ならない配列を有し、
各横溝は、トレッド幅方向に対し傾斜して延びる中央域と、該中央域の両端から前記周溝に向かって前記中央域に比しトレッド幅方向に対する傾斜角度を小さくして延びる側域とからなり、該側域は、前記周溝に向かって拡大する溝幅を有し、
前記横溝は、該横溝の溝底からタイヤ径方向内側に延びるサイプを具え、該サイプは、前記中央域のみに深さの浅い浅底部を有し、且つ少なくとも前記中央域と側域との境界部の近傍に、該境界部から浅底の起点を離間して浅底部を配置することを特徴とするタイヤ。 - 前記側域におけるサイプの深さは、前記中央域におけるサイプの最大深さと同じかそれより大きい、請求項1に記載のタイヤ。
- 前記境界部と前記浅底の起点との離間距離は、前記浅底部の配設位置における前記横溝の延在方向に沿って1.0mm以上3.0mm以下である、請求項1または2に記載のタイヤ。
- 前記トレッドの踏面に3本以上の周溝を有し、該周溝の幅が、トレッド幅方向最外側の1対の周溝に比しその他の周溝で小さい、請求項1から3のいずれか一項に記載のタイヤ。
- 前記その他の周溝の一方に隣接する陸部の横溝と、他方に隣接する陸部の横溝とが、該その他の周溝への開口位置をタイヤ周方向に同じくする、請求項4に記載のタイヤ。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015526171A JP6362597B2 (ja) | 2013-07-12 | 2014-07-09 | タイヤ |
| EP14822229.2A EP3020576B1 (en) | 2013-07-12 | 2014-07-09 | Tire |
| US14/898,546 US10500904B2 (en) | 2013-07-12 | 2014-07-09 | Tire |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-146653 | 2013-07-12 | ||
| JP2013146653 | 2013-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015004913A1 true WO2015004913A1 (ja) | 2015-01-15 |
Family
ID=52060332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/003648 Ceased WO2015004913A1 (ja) | 2013-07-12 | 2014-07-09 | タイヤ |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10500904B2 (ja) |
| EP (1) | EP3020576B1 (ja) |
| JP (1) | JP6362597B2 (ja) |
| CN (2) | CN204020427U (ja) |
| WO (1) | WO2015004913A1 (ja) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017087987A (ja) * | 2015-11-11 | 2017-05-25 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
| CN108146154A (zh) * | 2016-11-14 | 2018-06-12 | 住友橡胶工业株式会社 | 轮胎 |
| JP2018154195A (ja) * | 2017-03-16 | 2018-10-04 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
| JP2019214315A (ja) * | 2018-06-13 | 2019-12-19 | 住友ゴム工業株式会社 | タイヤ |
| JP2020032807A (ja) * | 2018-08-28 | 2020-03-05 | 横浜ゴム株式会社 | 空気入りタイヤ |
| WO2021024963A1 (ja) * | 2019-08-08 | 2021-02-11 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP2021054294A (ja) * | 2019-09-30 | 2021-04-08 | 住友ゴム工業株式会社 | タイヤ |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6362597B2 (ja) | 2013-07-12 | 2018-07-25 | 株式会社ブリヂストン | タイヤ |
| JP6366525B2 (ja) * | 2015-02-27 | 2018-08-01 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
| JP6450221B2 (ja) * | 2015-03-05 | 2019-01-09 | 住友ゴム工業株式会社 | 空気入りタイヤ |
| WO2016198296A1 (en) * | 2015-06-12 | 2016-12-15 | Bridgestone Corporation | Tyre tread |
| DE102016117816B4 (de) * | 2015-10-06 | 2025-01-02 | Toyo Tire & Rubber Co., Ltd. | Luftreifen |
| JP6867121B2 (ja) * | 2016-08-03 | 2021-04-28 | Toyo Tire株式会社 | 空気入りタイヤ |
| CN206436746U (zh) * | 2016-11-29 | 2017-08-25 | 风神轮胎股份有限公司 | 一种高耐磨中长途全轮位花纹 |
| JP6852408B2 (ja) * | 2017-01-18 | 2021-03-31 | 住友ゴム工業株式会社 | タイヤ |
| US10780743B2 (en) * | 2017-03-16 | 2020-09-22 | Sumitomo Rubber Industries, Ltd. | Tire |
| JP6926679B2 (ja) * | 2017-05-29 | 2021-08-25 | 住友ゴム工業株式会社 | タイヤ |
| JP6762267B2 (ja) * | 2017-06-07 | 2020-09-30 | 株式会社ブリヂストン | タイヤ |
| JP6540756B2 (ja) * | 2017-07-27 | 2019-07-10 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP7211014B2 (ja) * | 2018-11-01 | 2023-01-24 | 横浜ゴム株式会社 | 空気入りタイヤ |
| CN111559206B (zh) * | 2019-02-13 | 2023-05-26 | 住友橡胶工业株式会社 | 轮胎 |
| JP7116710B2 (ja) | 2019-06-14 | 2022-08-10 | 株式会社ブリヂストン | 空気入りタイヤ |
| DE102020204072A1 (de) * | 2020-03-30 | 2021-09-30 | Continental Reifen Deutschland Gmbh | Fahrzeugluftreifen |
| DE102021105423A1 (de) * | 2020-03-31 | 2021-09-30 | The Yokohama Rubber Co., Ltd. | Reifen |
| DE102021105422A1 (de) | 2020-03-31 | 2021-09-30 | The Yokohama Rubber Co., Ltd. | R e i f e n |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10151915A (ja) * | 1996-11-21 | 1998-06-09 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
| JPH10309910A (ja) * | 1997-05-08 | 1998-11-24 | Bridgestone Corp | 空気入りタイヤ |
| JP2002103922A (ja) | 2000-09-28 | 2002-04-09 | Bridgestone Corp | 左側通行車両用の空気入りタイヤ及び右側通行車両用の空気入りタイヤ |
| JP2008155789A (ja) * | 2006-12-25 | 2008-07-10 | Yokohama Rubber Co Ltd:The | 重荷重用空気入りタイヤ |
| JP2008222075A (ja) * | 2007-03-13 | 2008-09-25 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
| JP2010179827A (ja) * | 2009-02-06 | 2010-08-19 | Sumitomo Rubber Ind Ltd | 重荷重用タイヤ |
| JP2010254154A (ja) * | 2009-04-24 | 2010-11-11 | Bridgestone Corp | タイヤ |
| JP2012179965A (ja) * | 2011-02-28 | 2012-09-20 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
| JP2013052789A (ja) * | 2011-09-05 | 2013-03-21 | Bridgestone Corp | 空気入りタイヤ |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63137003A (ja) * | 1986-11-29 | 1988-06-09 | Yokohama Rubber Co Ltd:The | 雪氷路用タイヤ |
| JP2001055013A (ja) * | 1999-08-20 | 2001-02-27 | Bridgestone Corp | 空気入りタイヤ |
| JP2001357088A (ja) * | 2000-06-16 | 2001-12-26 | Denso Corp | パラメトリック機能を有する3次元モデリングシステムと、同システムによるパラメータ編集方法 |
| JP4516342B2 (ja) * | 2004-03-31 | 2010-08-04 | 住友ゴム工業株式会社 | 重荷重用タイヤ |
| CN101370674A (zh) | 2006-01-17 | 2009-02-18 | 株式会社普利司通 | 充气轮胎 |
| US8985168B2 (en) | 2009-10-20 | 2015-03-24 | Bridgestone Corporation | Pneumatic tire with tread having sipes with expanded diameter sections |
| US8444182B2 (en) * | 2010-11-04 | 2013-05-21 | Sea Energy Technology Co, Ltd. | Water intake pipe of ocean thermal energy conversion power plant |
| JP5149955B2 (ja) * | 2010-11-26 | 2013-02-20 | 住友ゴム工業株式会社 | 重荷重用タイヤ |
| JP6362597B2 (ja) | 2013-07-12 | 2018-07-25 | 株式会社ブリヂストン | タイヤ |
-
2014
- 2014-07-09 JP JP2015526171A patent/JP6362597B2/ja not_active Expired - Fee Related
- 2014-07-09 US US14/898,546 patent/US10500904B2/en active Active
- 2014-07-09 EP EP14822229.2A patent/EP3020576B1/en not_active Not-in-force
- 2014-07-09 WO PCT/JP2014/003648 patent/WO2015004913A1/ja not_active Ceased
- 2014-07-11 CN CN201420385080.2U patent/CN204020427U/zh not_active Expired - Lifetime
- 2014-07-11 CN CN201410331673.5A patent/CN104275989B/zh not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10151915A (ja) * | 1996-11-21 | 1998-06-09 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
| JPH10309910A (ja) * | 1997-05-08 | 1998-11-24 | Bridgestone Corp | 空気入りタイヤ |
| JP2002103922A (ja) | 2000-09-28 | 2002-04-09 | Bridgestone Corp | 左側通行車両用の空気入りタイヤ及び右側通行車両用の空気入りタイヤ |
| JP2008155789A (ja) * | 2006-12-25 | 2008-07-10 | Yokohama Rubber Co Ltd:The | 重荷重用空気入りタイヤ |
| JP2008222075A (ja) * | 2007-03-13 | 2008-09-25 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
| JP2010179827A (ja) * | 2009-02-06 | 2010-08-19 | Sumitomo Rubber Ind Ltd | 重荷重用タイヤ |
| JP2010254154A (ja) * | 2009-04-24 | 2010-11-11 | Bridgestone Corp | タイヤ |
| JP2012179965A (ja) * | 2011-02-28 | 2012-09-20 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
| JP2013052789A (ja) * | 2011-09-05 | 2013-03-21 | Bridgestone Corp | 空気入りタイヤ |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017087987A (ja) * | 2015-11-11 | 2017-05-25 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
| CN108146154B (zh) * | 2016-11-14 | 2021-03-19 | 住友橡胶工业株式会社 | 轮胎 |
| CN108146154A (zh) * | 2016-11-14 | 2018-06-12 | 住友橡胶工业株式会社 | 轮胎 |
| JP2018154195A (ja) * | 2017-03-16 | 2018-10-04 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
| JP2019214315A (ja) * | 2018-06-13 | 2019-12-19 | 住友ゴム工業株式会社 | タイヤ |
| JP7099062B2 (ja) | 2018-06-13 | 2022-07-12 | 住友ゴム工業株式会社 | タイヤ |
| JP7099181B2 (ja) | 2018-08-28 | 2022-07-12 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP2020032807A (ja) * | 2018-08-28 | 2020-03-05 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP2021024522A (ja) * | 2019-08-08 | 2021-02-22 | 横浜ゴム株式会社 | 空気入りタイヤ |
| WO2021024963A1 (ja) * | 2019-08-08 | 2021-02-11 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP7298381B2 (ja) | 2019-08-08 | 2023-06-27 | 横浜ゴム株式会社 | 空気入りタイヤ |
| US12370838B2 (en) | 2019-08-08 | 2025-07-29 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| JP2021054294A (ja) * | 2019-09-30 | 2021-04-08 | 住友ゴム工業株式会社 | タイヤ |
| JP7302416B2 (ja) | 2019-09-30 | 2023-07-04 | 住友ゴム工業株式会社 | タイヤ |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3020576B1 (en) | 2017-12-13 |
| CN104275989B (zh) | 2017-04-12 |
| EP3020576A4 (en) | 2016-06-22 |
| JPWO2015004913A1 (ja) | 2017-03-02 |
| US20160137006A1 (en) | 2016-05-19 |
| EP3020576A1 (en) | 2016-05-18 |
| US10500904B2 (en) | 2019-12-10 |
| CN204020427U (zh) | 2014-12-17 |
| JP6362597B2 (ja) | 2018-07-25 |
| CN104275989A (zh) | 2015-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6362597B2 (ja) | タイヤ | |
| JP6605849B2 (ja) | タイヤ | |
| CN103832221B (zh) | 充气轮胎 | |
| JP6526402B2 (ja) | 空気入りタイヤ | |
| CN107667017B (zh) | 轮胎胎面 | |
| US10696101B2 (en) | Pneumatic tire | |
| JP6259339B2 (ja) | 空気入りタイヤ | |
| JP6382647B2 (ja) | 空気入りタイヤ | |
| JP6450224B2 (ja) | 空気入りタイヤ | |
| WO2016075922A1 (ja) | 空気入りタイヤ | |
| US11458774B2 (en) | Tire | |
| JP6088336B2 (ja) | 空気入りタイヤ | |
| JPWO2019098277A1 (ja) | 空気入りタイヤ | |
| JP6511341B2 (ja) | タイヤ | |
| JP6902335B2 (ja) | タイヤ | |
| WO2014083758A1 (ja) | 空気入りタイヤ | |
| JP5520186B2 (ja) | 空気入りタイヤ | |
| CN110001297B (zh) | 充气轮胎 | |
| JP6484058B2 (ja) | 重荷重用空気入りタイヤ | |
| JP7333253B2 (ja) | 空気入りタイヤ | |
| WO2021111664A1 (ja) | 空気入りタイヤ | |
| WO2016002781A1 (ja) | タイヤ用トレッド及びこのトレッドを有するタイヤ | |
| JP6195726B2 (ja) | 空気入りタイヤ | |
| JP6012442B2 (ja) | 空気入りタイヤ | |
| JP2016222204A (ja) | 空気入りタイヤ |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14822229 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2015526171 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 14898546 Country of ref document: US |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2014822229 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |