WO2013088726A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2013088726A1 WO2013088726A1 PCT/JP2012/007979 JP2012007979W WO2013088726A1 WO 2013088726 A1 WO2013088726 A1 WO 2013088726A1 JP 2012007979 W JP2012007979 W JP 2012007979W WO 2013088726 A1 WO2013088726 A1 WO 2013088726A1
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- WIPO (PCT)
- Prior art keywords
- tread
- groove
- tire
- curved surface
- lug groove
- 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
- B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
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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
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
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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
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
- B60C11/0316—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation further characterised by the groove cross-section
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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
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C11/1315—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls having variable inclination angles, e.g. warped groove walls
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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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/14—Tyres specially adapted for particular applications for off-road use
Definitions
- the present invention relates to a pneumatic tire, and more particularly to a pneumatic tire with improved soil removal performance.
- tires mounted on vehicles that run in muddy areas have traction performance that catches and kicks mud by grooves formed on the tread surface, and discharges mud from the grooves so that the caught mud does not clog the grooves.
- soil removal performance There is a demand for soil removal performance.
- a lug groove extending in the tire width direction and having one end opened at the tread end is formed on the tread surface, so that mud can be caught and kicked out by the lug groove.
- Tires that have been used are used.
- the groove wall angle of the lug groove (angle formed by the tread part tread surface and the lug groove wall wall) gradually increases from the tire equator side toward the tread end side.
- a pneumatic tire is proposed (see, for example, Patent Document 1).
- Patent Document 1 proposes a pneumatic tire in which the amount by which the wall of the lug groove falls toward the land portion located between the lug grooves gradually increases toward the tread end side. Yes.
- the groove width of the lug groove is gradually increased toward the tread end side and the tire radial direction outer side, the mud that has entered the lug groove is easily discharged outward in the tire radial direction.
- an object of this invention is to provide the pneumatic tire which improved the soil removal performance.
- An object of the present invention is to advantageously solve the above-described problems, and the pneumatic tire according to the present invention forms a lug groove extending in the tire width direction and having one end opened at the tread end on the tread portion tread surface.
- At least one of the groove walls located on both sides in the tire circumferential direction of the lug groove has a curved surface portion formed of a curved surface of a predetermined shape, and the curved surface of the predetermined shape is
- the cross-sectional curve in the direction perpendicular to the opening edge to the tread surface or the extension line of the opening edge is a convex curve toward the side opposite to the lug groove side, and the curvature of the cross-sectional curve is the tire equator
- the curved surface gradually decreases from the side toward the tread end side.
- “extending in the tire width direction” means extending in the tire width direction, and “extending in the tire width direction” is inclined with respect to a direction parallel to the tire width direction.
- the curvature of the cross-sectional curve gradually decreases means that the cross-sectional curve is formed in the width direction (that is, the opening edge to the tread surface of the lug groove or an extension line of the opening edge in the curved surface portion).
- the curvatures at positions that are equally divided eg, equally divided into two equal parts, three equal parts, four equal parts, etc.
- the curvature gradually decreases. It points to become.
- the pneumatic tire of the present invention it is possible to sufficiently improve the soil removal performance when traveling in a muddy ground.
- FIG. 1 is a plan view of a part of a tread portion of a typical pneumatic tire according to the present invention. It is an enlarged plan view which expands and shows the shoulder side block land part of the pneumatic tire shown in FIG. (A) is the figure which looked at the shoulder side block land part shown in FIG. 2 from the direction of the arrow A shown in FIG. 2, (b) is the arrow which shows the shoulder side block land part shown in FIG. 2 in FIG. It is the figure seen from the direction of B.
- FIG. 3 is a view showing a cross section of a shoulder block land portion shown in FIG. 2, (a) showing a cross section taken along line II, (b) showing a cross section taken along line II-II, and (c).
- FIG. 4A and 4B are views showing a cross section of the shoulder block land portion shown in FIG. 2, where FIG. 4A shows a cross section taken along line IV-IV, and FIG. 4B shows a cross section taken along line VV.
- the pneumatic tire of the present invention has excellent soil removal performance, and can be particularly suitably used when traveling in a muddy area.
- FIG. 1 is a plan view of a part of a tread portion of an example of the pneumatic tire of the present invention.
- the pneumatic tire shown in FIG. 1 can be suitably used as a light truck tire without any particular limitation.
- the tread portion tread 100 of an example of the pneumatic tire of the present invention has one central main groove 1 extending in the tire circumferential direction on the tire equator CL, and a central main groove 1.
- a total of two main grooves 2 and 2 are formed which are located on both outer sides in the tire width direction (tread end TE side) and extend in the tire circumferential direction.
- the tread portion tread 100 has a plurality of lug grooves 3 extending in the tire width direction between the main groove 2 and the tread end TE, a central main groove 1, and a main groove adjacent to the central main groove 1 ( A plurality of lateral grooves 4 extending in the tire width direction are formed between the adjacent main grooves) 2.
- “extending in the tire circumferential direction” means extending in the tire circumferential direction
- “extending in the tire circumferential direction” is inclined with respect to a direction parallel to the tire circumferential direction. The case of extending is also included.
- the tread portion tread 100 has a shoulder side block land portion 10 defined by the main groove 2, the lug groove 3 and the tread end TE, and a center formed by the central main groove 1, the main groove 2 and the lateral groove 4.
- a side block land portion 20 is provided.
- the central main groove 1 is not particularly limited, and is substantially linear in a plan view and extends continuously in the tire circumferential direction.
- the central main groove may be a zigzag groove in plan view.
- the position where the central main groove is formed is not limited to the tire equator CL.
- the central main groove is formed in a range in which the drainage performance of the tire can be sufficiently secured, for example, in the central portion of the tread portion tread.
- the central main groove is formed in the center of the tread surface, the load applied to the tire is small and the ground contact area of the tire is small, such as when no load is loaded on a vehicle equipped with a tire (when empty) This is because sufficient drainage performance can be ensured by the central main groove even under conditions.
- the central main groove is preferably a linear groove in plan view with good drainage performance.
- the pair of main grooves 2 and 2 positioned with the central main groove 1 interposed therebetween is not particularly limited, and is substantially zigzag in a plan view and continuously extends in the tire circumferential direction.
- the main groove may be a groove that is linear in a plan view.
- the lug groove 3 has one end opened to the tread end TE and the other end opened to the main groove 2.
- the lug grooves 3 are not particularly limited, and the plan view shape is a curved shape that is convex toward one side in the tire circumferential direction, and extends in an inclined manner with respect to a direction parallel to the tire width direction.
- the lateral groove 4 has one end opened to the central main groove 1 and the other end opened to a main groove (adjacent main groove) 2 adjacent to the central main groove 1 and extending in the tire circumferential direction.
- the lateral groove 4 is not particularly limited, and has a curved shape in plan view and extends with an inclination with respect to a direction parallel to the tire width direction.
- the opening width to the tread part tread surface 100 of the horizontal groove 4 is not specifically limited, It is narrow at the center main groove 1 side.
- the “opening width of the lateral grooves 4” refers to the distance along the tire circumferential direction between the opening edges of the lateral grooves 4.
- the shoulder block land portion 10 formed on the tread portion tread 100 of the pneumatic tire of this example has a substantially trapezoidal tread shape. Further, the center side block land portion 20 formed on the tread portion tread surface 100 has a substantially triangular sail shape on the tread surface shape.
- the groove walls located on both sides in the tire circumferential direction of the lug grooves 3, that is, the side walls on both sides in the tire circumferential direction of the shoulder side block land portion 10 have a predetermined shape.
- the groove wall located on one side in the tire circumferential direction of the lug groove 3 has a curved surface portion 35 formed of a curved surface having a predetermined shape.
- the groove wall located in the tire circumferential direction other side of the lug groove 3 has the taper part 36 which consists of a predetermined-shaped taper surface.
- the shape of the other groove wall may be an arbitrary shape as long as at least one of the groove walls of the lug groove has a curved surface portion.
- the curved surface portion or the tapered portion may be provided over the entire width of the groove wall, or the curved surface portion is provided only on a part of the groove wall.
- a tapered portion may be provided. Note that, from the viewpoint of maximizing the effect obtained by providing the curved surface portion and the tapered portion, the curved surface portion and the tapered portion are preferably provided over the entire width of the groove wall.
- the curved surface portion 35 is shown in an enlarged plan view of the shoulder side block land portion 10 in FIG. 2, and FIG. 3A shows a view of the shoulder side block land portion 10 seen from the direction of the arrow A shown in FIG.
- the lug groove 3 is provided over substantially the entire width of the groove wall located on one side in the tire circumferential direction. 1, 2, and 3 (a), the groove wall having the curved surface portion 35 is inclined so that the height of the lug groove 3 from the groove bottom gradually decreases toward the main groove 2 side.
- a portion 37 is provided on the opening side of the lug groove 3 to the main groove 2.
- the groove wall having the curved surface portion 35 is an extension line of the outer edge in the tire radial direction of the side wall on the main groove 2 side of the shoulder side block land portion 10 in a plan view of the shoulder side block land portion 10.
- An inclined portion 37 is provided at a portion surrounded by a virtual line (not shown) orthogonal to the opening edge 31 through the main groove side end of the opening edge 31 of the lug groove 3 and the tire wall inner end edge of the groove wall.
- the curved surface portion 35 extends over substantially the entire width of the groove wall including the inclined portion 37.
- the curved surface of the predetermined shape forming the curved surface portion 35 also satisfies the following conditions (3) and (4). ing. (3)
- the distance in the direction orthogonal to the tire radial direction line between the tire radial direction line 35A and the tire radial direction line passing through the tire radial direction outer end 35B of the cross sectional curve 35A gradually increases inward in the tire radial direction. become longer. That is, the groove wall of the lug groove 3 is inclined in a direction in which the shoulder side block land portion 10 protrudes into the lug groove 3.
- the curved surface having the predetermined shape described above is not particularly limited, and the cross-sectional curve 35A in the direction perpendicular to the opening edge 31 of the lug groove 3 or the extension line EL of the opening edge 31 has the following conditions (5) to ( The curved surface which consists of the curve which satisfy
- a line that bisects the cross-sectional curve 35A in the cross-sectional width direction (direction parallel to the opening edge 31 or the direction perpendicular to the extension line EL of the opening edge 31) and the cross-sectional curve 35A in the cross-section height direction (tire diameter) Pass through an intersection P with a line located on the innermost side in the tire radial direction among the three lines equally divided into four directions.
- the tire radial direction outer end 35B is in contact with a line (tire radial direction line) extending in the cross-section height direction.
- the tire radial inner end 35C is in contact with a line extending in the cross-sectional width direction (a line parallel to the opening edge 31 of the lug groove 3 or the line orthogonal to the extension line EL of the opening edge 31).
- tapered portion 36 is an enlarged plan view of the shoulder side block land portion 10 shown in FIG. 2, and the shoulder side block land portion 10 shown in FIG. 3B as seen from the direction of arrow B shown in FIG. As shown, the lug groove 3 is provided over the entire width of the groove wall located on the other side in the tire circumferential direction.
- the tapered portion 36 has an opening edge 32 (an opening on the opposite side of the tire circumferential direction from the opening edge 31) to the tread portion tread surface 100 of the lug groove 3 in a plan view of the tread portion tread surface 100.
- the length in the direction orthogonal to the edge is gradually increased from the tire equator CL side toward the tread end TE side.
- the tapered portion 36 has a height from the groove bottom of the lug groove 3 (that is, a height from the inner edge 34 in the tire radial direction of the groove wall) on the tire equator CL side. It gradually becomes lower from the tread end TE side.
- a projecting portion 21 having a substantially triangular shape in plan view protruding toward the inside of the lateral groove 4 is provided at a portion of the center side block land portion 20 on one side in the tire circumferential direction and on the central main groove 1 side. ing. And by this projection part 21, the opening width of the horizontal groove 4 is narrowed by the center main groove 1 side.
- the protrusions may be provided on both sides in the tire circumferential direction of the center side block land portion.
- the protruding portion 21 of the side wall of the center side block land portion 20 on the side where the protruding portion 21 is provided that is, the groove wall of the lateral groove 4 is provided.
- the groove wall on the side to be located is not particularly limited, and is composed of a curved surface 41 whose length in the direction orthogonal to the extending direction of the lateral groove 4 gradually increases toward the protruding portion 21 side.
- one of the groove walls of the lug groove 3 has the curved surface portion 35 made of a curved surface with a predetermined shape, so that the running performance in a muddy place (particularly, traction performance).
- the soil removal performance can be sufficiently enhanced while ensuring That is, in this example pneumatic tire, the groove wall of the lug groove 3 is not a curved surface having a constant curvature or a flat surface having a constant inclination angle with respect to the tread surface, and is convex toward the side opposite to the lug groove 3 side, And since it has the curved surface part 35 which consists of a curved surface in which a curvature becomes small gradually toward the tread end TE side, the change in the curvature of the curved surface part 35 is utilized, and the soil removal performance is ensured while ensuring the traction performance.
- the curvature of the cross-sectional curve 35A of the curved surface portion 35A is increased (the radius of curvature is decreased), and the groove wall is laid down, so that the tire equator CL side in the lug groove 3 when traveling on muddy ground. This makes it easier to catch mud and ensure traction performance.
- the groove volume of the lug groove 3 is ensured by decreasing the curvature of the cross-sectional curve 35A of the curved surface portion 35 on the tread end TE side (increasing the radius of curvature) and raising the groove wall. Mud can be easily discharged.
- the curvature of the cross-sectional curve 35A of the curved surface portion 35 is gradually decreased toward the tread end side, and the shape of the groove wall provided with the curved surface portion 35 is changed in a three-dimensional manner, so that it is captured in the lug groove 3.
- the generated mud (mud column) can be facilitated to be discharged toward the tread end side as the tire rotates.
- the curved surface of the predetermined shape forming the curved surface portion 35 satisfies the conditions (3) and (4) described above. That is, the groove wall of the lug groove 3 is inclined in a direction in which the shoulder side block land portion 10 protrudes into the lug groove 3. Therefore, in the pneumatic tire of this example, compared to the case where the lug groove 3 is formed so that the shoulder side block land portion 10 is swollen in the tire circumferential direction, the curved surface of the predetermined shape constituting the curved surface portion 35 is a smooth curved surface. As a result, the soil removal performance can be further enhanced.
- the inclined portion 37 is provided on the groove wall of the lug groove 3, and the curved surface portion 35 extends over the inclined portion 37. Accordingly, in this example pneumatic tire, the slanted portion 37 located at the position where the groove wall of the lug groove 3 is extended toward the main groove 2 side makes it easier to catch mud in the lug groove 3 and improves the traction performance. Can be improved. Moreover, the curved surface of a predetermined shape can be extended widely to the main groove 2 side, and the soil removal performance can be sufficiently enhanced.
- the curved wall 35 is provided on one of the groove walls of the lug groove 3, and the tapered part 36 is provided on the other groove wall.
- the soil removal performance can be sufficiently enhanced while suppressing a significant decrease in volume. That is, when the curved surface portions 35 are provided on both the groove walls of the lug groove 3, the groove volume of the lug groove 3 may be reduced on the tire equator CL side having a large curvature, but the curved surface is formed only on one groove wall. If the part 35 is provided, the drop of the groove volume of the lug groove 3 can be suppressed. Moreover, if the taper part 36 is provided in the other groove wall, the discharge of mud in the lug groove 3 can be promoted by the inclined surface of the taper part 36 as compared with the case where the taper part 36 is not provided.
- the central main groove 1 is formed in the tread portion tread surface 100, the drainage performance of the tire can be sufficiently enhanced.
- the protrusion 21 is formed on the center side block land portion 20 and the opening width of the lateral groove 4 is narrowed on the central main groove 1 side. It is possible to prevent mud from flowing into the central main groove 1 from the TE side. Therefore, it can suppress that the center main groove 1 obstruct
- the groove wall on the side where the protruding portion 21 is located is formed by the curved surface 41 in the groove wall of the lateral groove 4, while ensuring the rigidity of the center side block land portion 20,
- the protrusion 21 can be formed.
- the pneumatic tire of this invention was demonstrated with reference to drawings, the pneumatic tire of this invention is not limited to the said example. And a change can be suitably added to the pneumatic tire of this invention.
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- Mechanical Engineering (AREA)
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Abstract
Description
なお、本発明において、「タイヤ幅方向に延びる」とは、タイヤ幅方向に向かって延びることを指し、「タイヤ幅方向に延びる」には、タイヤ幅方向と平行な方向に対して傾斜して延びる場合も含まれる。また、本発明において、「断面曲線の曲率が徐々に小さくなる」とは、曲面部内において、断面曲線を幅方向(即ち、ラグ溝のトレッド部踏面への開口縁または当該開口縁の延長線に直交する方向)または高さ方向(即ち、タイヤ径方向)に等分(例えば、2等分、3等分、4等分など)する位置における曲率を比較した際に、該曲率が徐々に小さくなることを指す。
なお、本発明において、「タイヤ周方向に延びる」とは、タイヤ周方向に向かって延びることを指し、「タイヤ周方向に延びる」には、タイヤ周方向と平行な方向に対して傾斜して延びる場合も含まれる。
なお、本発明の空気入りタイヤでは、ラグ溝の溝壁の少なくとも一方が曲面部を有していれば、他方の溝壁の形状は任意の形状としても良い。また、本発明の空気入りタイヤでは、溝壁に曲面部やテーパー部を設ける場合、溝壁の全幅に亘って曲面部やテーパー部を設けても良いし、溝壁の一部のみに曲面部やテーパー部を設けても良い。なお、曲面部やテーパー部を設けることにより得られる効果を最大化する観点からは、曲面部やテーパー部は溝壁の全幅に亘って設けることが好ましい。
なお、図1、図2および図3(a)に示すように、曲面部35を有する溝壁は、ラグ溝3の溝底からの高さが主溝2側に向かって徐々に低くなる傾斜部37をラグ溝3の主溝2への開口側に有している。より具体的には、曲面部35を有する溝壁は、ショルダー側ブロック陸部10の平面視において、ショルダー側ブロック陸部10の主溝2側の側壁のタイヤ径方向外端縁の延長線と、ラグ溝3の開口縁31の主溝側端を通って開口縁31に直交する仮想線(図示せず)と、溝壁のタイヤ径方向内端縁とで囲まれる部分に傾斜部37を有している。そして、曲面部35は、傾斜部37を含む溝壁の略全幅に亘って延在している。
(1)ラグ溝3のトレッド部踏面100への開口縁31または開口縁31の延長線ELに直交する方向の断面視にて、曲面の断面曲線35Aが、ラグ溝3側とは反対側(ショルダー側ブロック陸部10内)に向かって凸の曲線よりなる。
(2)断面曲線35Aの曲率が、タイヤ赤道CL側からトレッド端TE側に向かって徐々に小さくなる。
(3)断面曲線35Aのタイヤ径方向外端35Bを通るタイヤ径方向線と、断面曲線35Aとの間のタイヤ径方向線に直交する方向の距離が、タイヤ径方向内方に向かって徐々に長くなる。即ち、ラグ溝3の溝壁は、ショルダー側ブロック陸部10がラグ溝3内に向かって突出する方向に傾斜している。
(4)トレッド部踏面100の平面視にて、ラグ溝3のトレッド部踏面100への開口縁31または開口縁31の延長線ELと、曲面部35のタイヤ径方向内端縁33との間の、開口縁31または開口縁31の延長線ELに直交する方向の距離が、タイヤ赤道CL側からトレッド端TE側に向かって徐々に短くなる。
(5)断面曲線35Aを断面幅方向(開口縁31または開口縁31の延長線ELに直交する方向と平行な方向)に2等分する線と、断面曲線35Aを断面高さ方向(タイヤ径方向)に4等分する3本の線のうちタイヤ径方向最内側に位置する線との交点Pを通る。
(6)タイヤ径方向外端35Bにおいて、断面高さ方向に延びる線(タイヤ径方向線)と接する。
(7)タイヤ径方向内端35Cにおいて、断面幅方向に延びる線(ラグ溝3の開口縁31または開口縁31の延長線ELに直交する線と平行な線)と接する。
なお、図2のIV-IV線、V-V線に沿う断面を図5(a),(b)にそれぞれ示すように、ラグ溝3のタイヤ周方向他方側に位置する溝壁のうち、テーパー部36以外の部分はタイヤ径方向に沿って延在している。
なお、本発明の空気入りタイヤでは、突起部をセンター側ブロック陸部のタイヤ周方向両側に設けても良い。
また、この一例の空気入りタイヤでは、センター側ブロック陸部20に突起部21を形成し、横溝4の開口幅を中央主溝1側で狭めているので、泥濘地の走行時などにトレッド端TE側から中央主溝1内へと泥が流入するのを抑制することができる。従って、中央主溝1が泥により閉塞して所望の排水性能が得られなくなるのを抑制することができる。因みに、この一例の空気入りタイヤでは、横溝4の溝壁のうち突起部21が位置する側の溝壁を曲面41により形成しているので、センター側ブロック陸部20の剛性を確保しつつ、突起部21を形成することができる。
2 主溝(隣接主溝)
3 ラグ溝
4 横溝
10 ショルダー側ブロック陸部
20 センター側ブロック陸部
21 突起部
31 開口縁
32 開口縁
33 タイヤ径方向内端縁
34 タイヤ径方向内端縁
35 曲面部
35A 断面曲線
35B タイヤ径方向外端
35C タイヤ径方向内端
36 テーパー部
37 傾斜部
41 曲面
100 トレッド部踏面
Claims (6)
- トレッド部踏面に、タイヤ幅方向に延びて一端がトレッド端に開口するラグ溝を形成した空気入りタイヤであって、
前記ラグ溝のタイヤ周方向両側にそれぞれ位置する溝壁の少なくとも一方は、所定形状の曲面からなる曲面部を有し、
前記所定形状の曲面は、前記ラグ溝のトレッド部踏面への開口縁または当該開口縁の延長線に直交する方向の断面曲線が、ラグ溝側とは反対側に向かって凸の曲線よりなり、且つ、前記断面曲線の曲率が、タイヤ赤道側からトレッド端側に向かって徐々に小さくなる曲面であることを特徴とする、空気入りタイヤ。 - 前記断面曲線のタイヤ径方向外端を通るタイヤ径方向線と、前記断面曲線との間の前記タイヤ径方向線に直交する方向の距離が、タイヤ径方向内方に向かって徐々に長くなり、
前記トレッド部踏面の平面視にて、前記ラグ溝のトレッド部踏面への開口縁または当該開口縁の延長線と、前記曲面部のタイヤ径方向内端縁との間の、前記開口縁または当該開口縁の延長線に直交する方向の距離が、タイヤ赤道側からトレッド端側に向かって徐々に短くなることを特徴とする、請求項1に記載の空気入りタイヤ。 - トレッド部踏面に、タイヤ周方向に延びる主溝を有し、
前記ラグ溝の他端が前記主溝に開口し、
前記曲面部を有する溝壁は、ラグ溝底からの高さが前記主溝側に向かって徐々に低くなる傾斜部を前記主溝への開口側に有し、
前記曲面部は、少なくとも前記傾斜部に亘って延在することを特徴とする、請求項1または2に記載の空気入りタイヤ。 - 前記ラグ溝のタイヤ周方向一方側に位置する溝壁は、前記曲面部を有し、
前記ラグ溝のタイヤ周方向他方側に位置する溝壁は、タイヤ赤道側からトレッド端側に向かってラグ溝底からの高さが徐々に低くなり、且つ、トレッド部踏面の平面視にて、前記ラグ溝のトレッド部踏面への開口縁に直交する方向の長さがタイヤ赤道側からトレッド端側に向かって徐々に長くなるテーパー部を有することを特徴とする、請求項1~3の何れかに記載の空気入りタイヤ。 - 前記トレッド部踏面の中央部にタイヤ周方向に延びる中央主溝を有することを特徴とする、請求項1~4の何れかに記載の空気入りタイヤ。
- 前記トレッド部踏面に、前記中央主溝と、前記中央主溝に隣接してタイヤ周方向に延びる隣接主溝と、前記中央主溝と前記隣接主溝との間でタイヤ幅方向に延びる複数本の横溝とにより区画形成されるセンター側ブロック陸部を有し、
前記センター側ブロック陸部は、少なくともタイヤ周方向一方側に位置する横溝に向かって突出する突起部を有することを特徴とする、請求項5に記載の空気入りタイヤ。
Priority Applications (3)
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AU2012353879A AU2012353879B2 (en) | 2011-12-13 | 2012-12-13 | Pneumatic tire |
JP2013549124A JP6163106B2 (ja) | 2011-12-13 | 2012-12-13 | 空気入りタイヤ |
CN201280061892.5A CN103998257B (zh) | 2011-12-13 | 2012-12-13 | 充气轮胎 |
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JP2011-272631 | 2011-12-13 | ||
JP2011272631 | 2011-12-13 |
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WO2013088726A1 true WO2013088726A1 (ja) | 2013-06-20 |
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PCT/JP2012/007979 WO2013088726A1 (ja) | 2011-12-13 | 2012-12-13 | 空気入りタイヤ |
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JP (1) | JP6163106B2 (ja) |
CN (1) | CN103998257B (ja) |
AU (1) | AU2012353879B2 (ja) |
WO (1) | WO2013088726A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104029565A (zh) * | 2014-06-11 | 2014-09-10 | 厦门正新橡胶工业有限公司 | 泥地用全地形车充气轮胎胎面花纹结构 |
JP2016147672A (ja) * | 2016-05-27 | 2016-08-18 | 住友ゴム工業株式会社 | 空気入りタイヤ |
CN106183648A (zh) * | 2016-09-27 | 2016-12-07 | 安徽和鼎轮胎科技股份有限公司 | 全路况越野轮胎 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6311743B2 (ja) * | 2016-05-30 | 2018-04-18 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP7366715B2 (ja) * | 2019-11-29 | 2023-10-23 | 株式会社ブリヂストン | タイヤ |
KR102445780B1 (ko) * | 2021-01-06 | 2022-09-22 | 금호타이어 주식회사 | 공기입 타이어 |
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JPH11263104A (ja) * | 1998-03-18 | 1999-09-28 | Bridgestone Corp | 空気入りタイヤ |
JP2002029222A (ja) * | 2000-07-14 | 2002-01-29 | Bridgestone Corp | 空気入りタイヤ |
JP2004276861A (ja) * | 2003-03-18 | 2004-10-07 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2008012969A (ja) * | 2006-07-03 | 2008-01-24 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2009001156A (ja) * | 2007-06-21 | 2009-01-08 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2011235854A (ja) * | 2010-05-13 | 2011-11-24 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
JP2011235855A (ja) * | 2010-05-13 | 2011-11-24 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
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JP4602782B2 (ja) * | 2005-02-03 | 2010-12-22 | 株式会社ブリヂストン | 重荷重用空気入りタイヤ |
US8156977B2 (en) * | 2008-12-16 | 2012-04-17 | The Goodyear Tire & Rubber Company | Tire |
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2012
- 2012-12-13 JP JP2013549124A patent/JP6163106B2/ja not_active Expired - Fee Related
- 2012-12-13 CN CN201280061892.5A patent/CN103998257B/zh not_active Expired - Fee Related
- 2012-12-13 WO PCT/JP2012/007979 patent/WO2013088726A1/ja active Application Filing
- 2012-12-13 AU AU2012353879A patent/AU2012353879B2/en not_active Ceased
Patent Citations (7)
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JPH11263104A (ja) * | 1998-03-18 | 1999-09-28 | Bridgestone Corp | 空気入りタイヤ |
JP2002029222A (ja) * | 2000-07-14 | 2002-01-29 | Bridgestone Corp | 空気入りタイヤ |
JP2004276861A (ja) * | 2003-03-18 | 2004-10-07 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2008012969A (ja) * | 2006-07-03 | 2008-01-24 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2009001156A (ja) * | 2007-06-21 | 2009-01-08 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2011235854A (ja) * | 2010-05-13 | 2011-11-24 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
JP2011235855A (ja) * | 2010-05-13 | 2011-11-24 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104029565A (zh) * | 2014-06-11 | 2014-09-10 | 厦门正新橡胶工业有限公司 | 泥地用全地形车充气轮胎胎面花纹结构 |
JP2016147672A (ja) * | 2016-05-27 | 2016-08-18 | 住友ゴム工業株式会社 | 空気入りタイヤ |
CN106183648A (zh) * | 2016-09-27 | 2016-12-07 | 安徽和鼎轮胎科技股份有限公司 | 全路况越野轮胎 |
Also Published As
Publication number | Publication date |
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JP6163106B2 (ja) | 2017-07-12 |
AU2012353879A1 (en) | 2014-06-19 |
CN103998257A (zh) | 2014-08-20 |
AU2012353879B2 (en) | 2016-03-10 |
CN103998257B (zh) | 2016-09-07 |
JPWO2013088726A1 (ja) | 2015-04-27 |
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