WO2010089969A1 - 建設車両用空気入りタイヤ - Google Patents
建設車両用空気入りタイヤ Download PDFInfo
- Publication number
- WO2010089969A1 WO2010089969A1 PCT/JP2010/000425 JP2010000425W WO2010089969A1 WO 2010089969 A1 WO2010089969 A1 WO 2010089969A1 JP 2010000425 W JP2010000425 W JP 2010000425W WO 2010089969 A1 WO2010089969 A1 WO 2010089969A1
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- WIPO (PCT)
- Prior art keywords
- groove
- tire
- circumferential direction
- narrow groove
- central
- 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.)
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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
- B60C11/12—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
- B60C11/0311—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
- 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
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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
- B60C2011/0341—Circumferential grooves
- B60C2011/0355—Circumferential grooves characterised by depth
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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
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
- B60C2200/065—Tyres specially adapted for particular applications for heavy duty vehicles for construction vehicles
Definitions
- the present invention relates to a pneumatic tire, and more particularly to a pneumatic tire for a construction vehicle used for a dump truck or the like mainly used at a construction site or a mine.
- a pneumatic tire in which a plurality of lug grooves located on both sides of the tread in the tire width direction is generally used.
- this pneumatic tire for construction vehicles in order to improve the wear life of the tire, it is common to increase the tread volume by increasing the tread gauge or decreasing the groove area.
- Patent Document 1 As a countermeasure, for example, in Patent Document 1, by using a tread having a predetermined narrow groove in the width direction, the wind flowing in the tread groove is efficiently sent into the groove in the width direction, and the tire center portion is air-cooled. Thus, construction vehicle tires that suppress exothermic deterioration are cited. Further, in Patent Document 2, by forming a predetermined lateral sub-groove in each block land portion that forms the shoulder region of the tread, when the stepping end is kicked off from the road surface, the stepping end is quickly removed from the road surface. There has been disclosed a pneumatic tire that comes apart and reduces uneven wear at the tread edge without significantly reducing land rigidity.
- An object of the present invention is to provide a pneumatic tire for a construction vehicle that can suppress deterioration of heat generation while having high wear resistance, particularly when used as a drive wheel, by optimizing a tread. It is in.
- a first inclined groove portion extending at a predetermined angle with respect to the tire circumferential direction in the central region, and the first inclined groove portion are opposite to the tire circumferential direction
- the second inclined groove portions extending at an angle of are alternately connected to each other, and one central thin groove extending continuously in a zigzag shape along the tire circumferential direction is provided.
- One lateral narrow groove extending in the tire circumferential direction and passing through the tire width direction inner side portion is provided, and the tire width direction inner side portion of the lug groove is close to the connecting portion between the first inclined groove portion and the second inclined groove portion. And the vicinity of the other connecting part and facing the tire width direction, and the lug A width direction narrow groove is provided between the tire width direction inner side portion and the closer connecting portion, and a central narrow groove, a side narrow groove, and a width direction narrow groove are disposed in the tread portion.
- the present invention has been made based on such findings, and the gist thereof is as follows.
- first inclined groove portions extending at a predetermined angle with respect to the tire circumferential direction and second inclined groove portions extending at an angle opposite to the tire circumferential direction are alternately connected.
- one central narrow groove extending continuously in a zigzag shape along the tire circumferential direction is provided, and one side extending in the tire circumferential direction through the inner side in the tire width direction of the lug groove in each lateral region.
- a lateral narrow groove is provided, and the inner side portion of the lug groove in the tire width direction is in a positional relationship facing the vicinity of the connecting portion of the first inclined groove portion and the second inclined groove portion facing the tire width direction, And between the inner side in the tire width direction of the lug groove and the closer connecting part
- a plurality of pentagonal or more polygonal block land portions are arranged around the tire circumference.
- the first inclined groove portion, the second inclined groove portion, and the width-direction narrow groove of the central narrow groove are in contact with each other, and the lateral narrow grooves are opposed to each other.
- FIG. 1 is a view schematically showing a part of a tread of an embodiment of a pneumatic tire for construction vehicles according to the present invention.
- FIGS. 2 and 3 show the pneumatic tire for construction vehicles according to the present invention.
- FIG. 4 is a diagram schematically showing a part of a tread according to another embodiment, and FIG. 4 is a diagram schematically showing a part of a tread of a conventional pneumatic tire for construction vehicles.
- the direction of arrow C in the figure is the tire circumferential direction
- the direction of arrow W is the tire width direction.
- the pneumatic tire for a construction vehicle has the lateral region when the tread 10 is divided into a central region 20 and both lateral regions 30 located on both sides of the central region 20 in the tire width direction.
- Reference numeral 30 denotes a pneumatic tire for construction vehicles having a plurality of lug grooves 31.
- the central area 20 refers to an area of 50% or less of the tread width around the tire equator E
- the side area 30 refers to an area other than the central area 20 of the tread.
- a first inclined groove portion 21a extending at a predetermined angle with respect to the tire circumferential direction, and the first inclined groove portion 21a with respect to the tire circumferential direction.
- the second inclined groove portions 21b extending at opposite angles are alternately connected, and one central narrow groove 21 extending continuously in a zigzag shape along the tire circumferential direction is provided.
- One lateral narrow groove 32 that extends in the tire circumferential direction through the tire width direction inner portion 31a of the lug groove 31 is provided, and the tire width direction inner portion 31a of the lug groove 31 includes the first inclined groove portion and the first inclined groove portion.
- the polygon block rows 24a and 24b of the present invention are arranged such that the front end portions of the polygon blocks 23a and 23b sandwich the central narrow groove 21 extending zigzag in the tire circumferential direction C. Adjacent to the opposing polygonal block beyond E. Accordingly, when used as a drive wheel of a dump truck or the like, a polygon block land portion (a polygon block land portion 23a in FIG. 1) that has been stepped on first during travel is a polygon facing the central narrow groove. Since a part of the block land portion 23 (in FIG.
- the central narrow groove 21 is continuously connected in a zigzag manner along the tire circumferential direction by alternately connecting the first inclined groove portions 21a and the second inclined groove portions 21b to the central region 20.
- the other structure is not particularly limited, but the groove depth is preferably 60% or more of the groove depth of the lug groove. This is because when the groove depth of the central narrow groove 21 is less than 60%, the tread is worn out at the end of use of the tire and the central thin groove 21 disappears, and the effects of the present invention cannot be sufficiently exhibited.
- the amplitude w1 of the extending shape of the central narrow groove 21 is preferably 5 to 30% of the tread width TW.
- the amplitude w1 is less than 5%, the force for drawing a part of the polygonal block 23 becomes small, the traction cannot be improved sufficiently, and the wear resistance may not be improved sufficiently.
- the amplitude w1 exceeds 30%, the block rigidity of the center portion is lowered and the wear resistance cannot be improved.
- the first inclined groove 21a preferably extends at an angle ⁇ of 20 to 50 ° with respect to the tire circumferential direction.
- the angle ⁇ is less than 20 °, the force for drawing a part of the polygonal block 23 becomes small, the traction cannot be sufficiently improved, and the wear resistance may not be sufficiently improved. If the angle exceeds 50 °, the block rigidity of the center portion decreases, and the wear resistance cannot be improved.
- the second inclined groove 21b preferably extends at an angle of ⁇ 20 to ⁇ 50 ° with respect to the tire circumferential direction.
- the groove width w2 of the central narrow groove 21 is preferably 3 to 8% of the arrangement pitch A of the block land portion 23. This is because if the groove width w2 of the central narrow groove 21 is less than 3% of the arrangement pitch, the groove width is too narrow, so that the heat dissipation effect cannot be obtained and the heat generation may be deteriorated. If the groove width w2 exceeds 8%, the force for drawing a part of the polygonal block 23 becomes small, the traction cannot be improved sufficiently, and the wear resistance may not be improved sufficiently. Because there is.
- the said side narrow groove 32 is a groove
- the tire width direction inner side portion 31a of the lug groove 31 refers to a portion of the lug groove 31 from the position where the groove width starts to decrease to the inner end in the tire width direction.
- the width-direction narrow grooves 22, and a tire width direction inner side portion 31a of the lug groove 31, between the connecting portion 21c 2 of the towards the near central narrow groove 21, a groove extending in communication are not particularly limited.
- the width direction narrow groove 22 preferably has a groove width of 3 to 8% of the arrangement pitch A of the block land portions 23.
- the groove width of the width direction narrow groove 22 is less than 3% of the arrangement pitch, since the groove width is too narrow, a heat dissipation effect cannot be obtained, and heat generation may be deteriorated. If the groove width exceeds 8%, the force for drawing a part of the polygonal block 23 becomes small, the traction cannot be improved sufficiently, and the wear resistance may not be improved sufficiently. Because there is.
- the first inclined groove portion 21a, the second inclined groove portion 21b, and the widthwise narrow groove 22 are in contact with each other, and the side narrow grooves 32 are opposed grooves. It is preferable that the walls do not contact each other.
- the opposing groove walls come into contact with each other and the groove is closed, and as a result, the block of the center portion 20 is improved. This is because the wear resistance can be improved.
- the groove walls of the side narrow grooves 22 are not in contact with each other, the grooves will not be closed, so that good heat resistance can be secured.
- the tire to be grounded is in a state in which a TRA regular load (100%) is applied after rim assembly with a regular TRA rim and filling with the regular internal pressure of TRA.
- the polygonal block land portion 23 having a pentagon or more formed by the central narrow groove 21, the lateral narrow groove 32, the lug groove 31, and the width-direction narrow groove 22 has a tire circumference as shown in FIG.
- Two block rows 24a and 24b are formed by being juxtaposed along the direction c.
- the polygonal block land portion 23 is not particularly limited as long as it is a pentagon or more.
- the lug groove 31 in the tire width direction inner portion 31a for example, as shown in FIG. It can also be a square block, as shown in FIG. 2, can be a hexagonal polygonal block land portion 23, or can be a pentagonal polygonal block land portion 23 as shown in FIG. it can.
- any of the pentagonal, hexagonal, and heptagonal forms by improving the traction, the shear force at the time of kicking out the tire, which is the main factor of wear, is reduced, and the wear resistance is improved. Can do.
- Example 1 As Example 1, the 1st inclination groove part which has the several lug groove 31 in the side area 30 of the tread 10, and extends in the said center area 20 at a predetermined angle (Table 1) with respect to the tire circumferential direction. 21 a and the first inclined groove portion 21 a are alternately connected to the second inclined groove portion 21 b extending at an angle opposite to the tire circumferential direction (Table 1), and zigzag along the tire circumferential direction.
- One central narrow groove 21 extending continuously is provided, and one lateral narrow groove 32 extending in the tire circumferential direction through the tire width direction inner portion 31a of the lug groove 31 is provided in each lateral region 30.
- the inner side 31a in the tire width direction of the lug groove 31 is in a positional relationship facing the connecting part 21c, which is the closer of the connecting parts 21c of the first inclined groove part and the second inclined groove part, in the tire width direction, and the lug
- the inner width portion 31a of the groove in the tire width direction and the closer connecting portion 2 A widthwise narrow groove 22 that communicates with the tire c and extends in a direction of 90 ° with respect to the tire circumferential direction is provided, and the tread portion 10 has a central narrow groove 21, a lateral narrow groove 32, and a width direction.
- a pneumatic tire in which a plurality of heptagonal polygonal block land portions 23 are arranged side by side along the tire circumferential direction to form a pneumatic tire as a sample by arranging the narrow grooves 22 is prepared. did.
- the groove depth (mm) of the rib groove 31 the groove depth (mm) of the central narrow groove 21, and the tire width direction length (%) of the first inclined groove portion and the second inclined portion with respect to the tread width.
- the angle (°) of the first inclined groove portion 21a and the second inclined groove portion 21a with respect to the tire circumferential direction is shown in Table 1.
- Example 2 As Example 2, as shown in FIG. 2, a sample was produced under the same conditions as Example 1 except that the formed polygonal block land portion 23 was a hexagon.
- the groove depth (mm) of the rib groove 31 the groove depth (mm) of the central narrow groove 21, and the tire width direction length (%) of the first inclined groove portion and the second inclined portion with respect to the tread width.
- the angle (°) of the first inclined groove portion 21a and the second inclined groove portion 21a with respect to the tire circumferential direction is shown in Table 1.
- Example 3 In Example 3, as shown in FIG. 3, a sample was produced under the same conditions as in Example 1 except that the formed polygonal block land portion 23 was a pentagon.
- the groove depth (mm) of the rib groove 31 In the pneumatic tire, the groove depth (mm) of the rib groove 31, the groove depth (mm) of the central narrow groove 21, and the tire width direction length (%) of the first inclined groove portion and the second inclined portion with respect to the tread width.
- the angle (°) of the first inclined groove portion 21a and the second inclined groove portion 21a with respect to the tire circumferential direction is shown in Table 1.
- Comparative Example 1 As shown in FIG. 4, Comparative Example 1 is provided with a conventional tread 100 in which a polygonal block land portion 230 is provided with a straight central narrow groove 210 extending along the tire circumferential direction instead of zigzag. A tire having the same conditions as in Example 1 was used as a sample except for the above.
- Example 1 The pneumatic tires of Example 1, Example 2 and Comparative Example 1 were assembled on the regular TRA rim, filled with the regular internal pressure of TRA, mounted on the vehicle, and run on the market.
- the wear resistance was evaluated by measuring the groove depth (mm) at a position 25% outside the center with respect to the tread width. The results are shown in Table 1.
- the evaluation result is represented by a relative ratio (%) when the wear resistance of the tire of Comparative Example 1 is 100%, and the larger the numerical value (%), the better the result.
- Example 2 The pneumatic tires of Example 1, Example 2 and Comparative Example 1 were assembled on a TRA regular rim, charged with TRA regular load (100%) after filling with TRA regular internal pressure, and a test speed of 8 km. An indoor drum test was conducted for 24 hours at / h, and the heat generation was evaluated by measuring the temperature of the tread center. The results are shown in Table 1. The evaluation result is represented by the relative temperature (° C.) when the heat generation property of the tire of Comparative Example 1 is 0, and the lower the numerical value (° C.), the better the result.
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Abstract
Description
(1)トレッドを中央域と該中央域のタイヤ幅方向両側に位置する両側方域に区分したときの該側方域に、複数本のラグ溝を有する建設車両用空気入りタイヤにおいて、中央域に、タイヤ周方向に対し所定の角度で延在する第1傾斜溝部と、該第1傾斜溝部とはタイヤ周方向に対し逆向きの角度で延在する第2傾斜溝部とを交互に連結して、タイヤ周方向に沿ってジグザグ状に連続して延びる1本の中央細溝を設け、各側方域に、前記ラグ溝のタイヤ幅方向内側部を通り、タイヤ周方向に延びる1本の側方細溝を設け、前記ラグ溝のタイヤ幅方向内側部が、第1傾斜溝部と第2傾斜溝部の連結部のうちの近い方の連結部付近とタイヤ幅方向に向かい合う配置関係にあり、かつ前記ラグ溝のタイヤ幅方向内側部と、前記近い方の連結部との間に、1本の幅方向細溝を設け、トレッド部に、中央細溝、側方細溝および幅方向細溝を配設することにより、複数個の5角形以上の多角形のブロック陸部がタイヤ周方向に沿って並置された2列のブロック列を形成して成ることを特徴とする建設車両用空気入りタイヤ。
図1は、本発明の建設車両用空気入りタイヤの一実施形態について、トレッドの一部を模式的に示した図であり、図2及び図3は、本発明の建設車両用空気入りタイヤの他の実施形態について、トレッドの一部を模式的に示した図であり、図4は、従来の建設車両用空気入りタイヤのトレッドの一部を模式的に示した図である。
なお、図1~図4については、いずれも、図の矢印Cの方向がタイヤ周方向であり、矢印Wの方向がタイヤ幅方向である。
そして本発明は、図1に示すように、前記中央域20に、タイヤ周方向に対し所定の角度で延在する第1傾斜溝部21aと、該第1傾斜溝部21aとはタイヤ周方向に対し逆向きの角度で延在する第2傾斜溝部21bとを交互に連結して、タイヤ周方向に沿ってジグザグ状に連続して延びる1本の中央細溝21を設け、各側方域30に、前記ラグ溝31のタイヤ幅方向内側部31aを通り、タイヤ周方向に延びる1本の側方細溝32を設け、前記ラグ溝31のタイヤ幅方向内側部31aが、第1傾斜溝部と第2傾斜溝部の連結部21c1、c2のうちの近い方の連結部21c2とタイヤ幅方向に向かい合う配置関係にあり、かつ前記ラグ溝のタイヤ幅方向内側部31aと、前記近い方の連結部21cとの間に、連通して延びる1本の幅方向細溝22を設け、トレッド部10に、中央細溝21、側方細溝32および幅方向細溝22を配設することにより、複数個の5角形以上の多角形のブロック陸部23a、23bがタイヤ周方向に沿って並置された2列のブロック列24a、24bを形成する。
また、同様の理由で、前記第2傾斜溝部21bは、タイヤ周方向に対し-20~-50°の角度で延在することが好ましい。
ただし、前記幅方向細溝22は、前記中央細溝21と同様に、その溝幅が前記ブロック陸部23の配設ピッチAの3~8%であることが好ましい。前記幅方向細溝22の溝幅が配設ピッチの3%未満の場合、溝幅が狭すぎるために、放熱効果が得られなくなり、発熱性の悪化を引き起こす恐れがあるからであり、一方、前記溝幅が8%を超えると、前記多角形ブロック23の一部を引き込むための力が小さくなり、十分にトラクションを向上させることができず、十分に耐摩耗性の向上が図れない恐れがあるからである。
なお、5角形、6角形又は7角形のいずれの場合であっても、トラクションの向上によって、摩耗の主要因となるタイヤの蹴り出し時の剪断力を低減し、耐摩耗性の向上を図ることができる。
(実施例1)
実施例1として、トレッド10の側方域30に、複数本のラグ溝31を有し、前記中央域20に、タイヤ周方向に対し所定の角度(表1)で延在する第1傾斜溝部21aと、該第1傾斜溝部21aとはタイヤ周方向に対し逆向きの角度(表1)で延在する第2傾斜溝部21bとを交互に連結して、タイヤ周方向に沿ってジグザグ状に連続して延びる1本の中央細溝21を設け、各側方域30に、前記ラグ溝31のタイヤ幅方向内側部31aを通り、タイヤ周方向に延びる1本の側方細溝32を設け、前記ラグ溝31のタイヤ幅方向内側部31aが、第1傾斜溝部と第2傾斜溝部の連結部21cのうちの近い方の連結部21cとタイヤ幅方向に向かい合う配置関係にあり、かつ前記ラグ溝のタイヤ幅方向内側部31aと、前記近い方の連結部21cとの間に、連通し、タイヤ周方向に対して90°の方向に延びる1本の幅方向細溝22を設け、トレッド部10に、中央細溝21、側方細溝32および幅方向細溝22を配設することにより、複数個の7角形の多角形のブロック陸部23がタイヤ周方向に沿って並置された2列のブロック列24を形成した空気入りタイヤを、サンプルとして作製した。
なお、空気入りタイヤの、リブ溝31の溝深さ(mm)、中央細溝21の溝深さ(mm)、トレッド幅に対する第1傾斜溝部及び第2傾斜部のタイヤ幅方向長さ(%)、タイヤ周方向に対する第1傾斜溝部21a及び第2傾斜溝部21aの角度(°)については、表1に示す。
実施例2として、図2に示すように、形成した多角形ブロック陸部23が6角形であること以外は、実施例1と同様の条件によって、サンプルを作製した。
なお、空気入りタイヤの、リブ溝31の溝深さ(mm)、中央細溝21の溝深さ(mm)、トレッド幅に対する第1傾斜溝部及び第2傾斜部のタイヤ幅方向長さ(%)、タイヤ周方向に対する第1傾斜溝部21a及び第2傾斜溝部21aの角度(°)については、表1に示す。
実施例3は、図3に示すように、形成した多角形ブロック陸部23が5角形であること以外は、実施例1と同様の条件によって、サンプルを作製した。
なお、空気入りタイヤの、リブ溝31の溝深さ(mm)、中央細溝21の溝深さ(mm)、トレッド幅に対する第1傾斜溝部及び第2傾斜部のタイヤ幅方向長さ(%)、タイヤ周方向に対する第1傾斜溝部21a及び第2傾斜溝部21aの角度(°)については、表1に示す。
比較例1は、図4に示すように、ジグザグではなく、タイヤ周方向に沿った直線状の中央細溝210を挟んで多角形ブロック陸部230が設けられている、従来のトレッド100を具えること以外は、実施例1と同様の条件のタイヤをサンプルとして用いた。
実施例1、実施例2及び比較例1の空気入りタイヤを、TRAの正規リムにリム組みし、TRAの正規内圧充填後、車両に装着し、市場を走行させた後、トレッドの所定位置(トレッド幅に対し、センターから25%外側位置)での溝深さ(mm)を測定することにより、耐摩耗性の評価を行った。結果を表1に示す。
なお、評価結果は、比較例1のタイヤの耐摩耗性を100%としたときの相対比(%)によって表わし、数値(%)が大きいほど良好な結果となる。
実施例1、実施例2及び比較例1の空気入りタイヤを、TRAの正規リムにリム組みし、TRAの正規内圧充填後、TRAの正規荷重(100%)をかけた状態で、試験速度8km/hで24時間、室内ドラム試験を行い、トレッドセンター部の温度測定を行うことで発熱性の評価を行った。結果を表1に示す。
なお、評価結果は、比較例1のタイヤの発熱性を0としたときの相対温度(℃)によって表わし、数値(℃)が低いほど良好な結果となる。
20、200 中央域
21、210 中央細溝
22、220 幅方向細溝
30、300 側方域
31、310 ラグ溝
32 側方細溝
Claims (7)
- トレッドを中央域と該中央域のタイヤ幅方向両側に位置する両側方域に区分したときの該側方域に、複数本のラグ溝を有する建設車両用空気入りタイヤにおいて、
中央域に、タイヤ周方向に対し所定の角度で延在する第1傾斜溝部と、該第1傾斜溝部とはタイヤ周方向に対し逆向きの角度で延在する第2傾斜溝部とを交互に連結して、タイヤ周方向に沿ってジグザグ状に連続して延びる1本の中央細溝を設け、
各側方域に、前記ラグ溝のタイヤ幅方向内側部を通り、タイヤ周方向に延びる1本の側方細溝を設け、
前記ラグ溝のタイヤ幅方向内側部が、第1傾斜溝部と第2傾斜溝部の連結部のうちの近い方の連結部付近とタイヤ幅方向に向かい合う配置関係にあり、かつ前記ラグ溝のタイヤ幅方向内側部と、前記近い方の連結部との間に、1本の幅方向細溝を設け、
トレッド部に、中央細溝、側方細溝および幅方向細溝を配設することにより、複数個の5角形以上の多角形のブロック陸部がタイヤ周方向に沿って並置された2列のブロック列を形成して成ることを特徴とする建設車両用空気入りタイヤ。 - 前記中央細溝の溝深さは、ラグ溝の溝深さの60%以上である請求項1記載の建設車両用空気入りタイヤ。
- 前記中央細溝の延在形状の振幅は、トレッド幅の5~30%である請求項1または2記載の建設車両用空気入りタイヤ。
- 第1傾斜溝部は、タイヤ周方向に対し20~50°の角度で延在する請求項1、2または3記載の建設車両用空気入りタイヤ。
- 第2傾斜溝部は、タイヤ周方向に対し-20~-50°の角度で延在する請求項1~4のいずれか1項記載の建設車両用空気入りタイヤ。
- 前記中央細溝の溝幅は、ブロック陸部の配設ピッチの3~8%である請求項1~5のいずれか1項記載の建設車両用空気入りタイヤ。
- タイヤ接地時に、前記中央細溝の第1傾斜溝部及び前記第2傾斜溝部及び前記幅方向細溝は、それぞれの対向する溝壁同士が接触し、前記側方細溝は、対向する溝壁同士が接触しない請求項1~6のいずれか1項記載の建設車両用空気入りタイヤ。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/148,204 US9254720B2 (en) | 2009-02-06 | 2010-01-26 | Pneumatic tire for construction vehicle |
| ES10738312.7T ES2579960T3 (es) | 2009-02-06 | 2010-01-26 | Neumáticos para vehículos de obra |
| CN201080011156XA CN102348562B (zh) | 2009-02-06 | 2010-01-26 | 工程车辆用充气轮胎 |
| EP10738312.7A EP2394824B1 (en) | 2009-02-06 | 2010-01-26 | Pneumatic tires for construction vehicles |
| BRPI1008112A BRPI1008112A2 (pt) | 2009-02-06 | 2010-01-26 | pneumático para veículos de construção |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-026207 | 2009-02-06 | ||
| JP2009026207A JP5231275B2 (ja) | 2009-02-06 | 2009-02-06 | 建設車両用空気入りタイヤ |
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| Publication Number | Publication Date |
|---|---|
| WO2010089969A1 true WO2010089969A1 (ja) | 2010-08-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2010/000425 Ceased WO2010089969A1 (ja) | 2009-02-06 | 2010-01-26 | 建設車両用空気入りタイヤ |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9254720B2 (ja) |
| EP (1) | EP2394824B1 (ja) |
| JP (1) | JP5231275B2 (ja) |
| CN (1) | CN102348562B (ja) |
| BR (1) | BRPI1008112A2 (ja) |
| ES (1) | ES2579960T3 (ja) |
| WO (1) | WO2010089969A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013051053A1 (ja) * | 2011-10-03 | 2013-04-11 | 株式会社ブリヂストン | 重荷重用空気入りタイヤ |
| US9038681B2 (en) | 2010-10-22 | 2015-05-26 | Bridgestone Corporation | Heavy load pneumatic tire for construction vehicles |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6527758B2 (ja) * | 2015-06-13 | 2019-06-05 | 株式会社ブリヂストン | 空気入りタイヤ |
| FR3050402A1 (fr) | 2016-04-22 | 2017-10-27 | Michelin & Cie | Bande de roulement de pneu comprenant des decoupures de differentes profondeurs |
| JP6872923B2 (ja) * | 2017-02-13 | 2021-05-19 | 株式会社ブリヂストン | 建設車両用タイヤ |
| JP6885176B2 (ja) * | 2017-04-18 | 2021-06-09 | 住友ゴム工業株式会社 | タイヤ |
| JP6981925B2 (ja) * | 2018-06-04 | 2021-12-17 | 株式会社ブリヂストン | タイヤ加硫方法および装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3196920A (en) * | 1964-03-16 | 1965-07-27 | Louis Fishman & Co Inc | Tire construction |
| JPS62292509A (ja) * | 1986-06-11 | 1987-12-19 | Bridgestone Corp | 重荷重用空気入りラジアルタイヤ |
| JPH11222014A (ja) * | 1998-02-05 | 1999-08-17 | Sumitomo Rubber Ind Ltd | 重荷重用ラジアルタイヤ |
| JP2007083822A (ja) | 2005-09-21 | 2007-04-05 | Bridgestone Corp | 空気入りタイヤ |
| JP2007191093A (ja) | 2006-01-20 | 2007-08-02 | Bridgestone Corp | 建設車両用タイヤ |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05155204A (ja) * | 1991-12-05 | 1993-06-22 | Chikusui Canycom:Kk | 空気入りタイヤ |
| US7281555B2 (en) * | 2001-06-07 | 2007-10-16 | Bridgestone Corporation | Off-the-road tire |
| WO2004101247A1 (ja) * | 2003-05-13 | 2004-11-25 | Bridgestone Corporation | タイヤ加硫金型および空気入りタイヤ |
| AU157408S (en) | 2003-07-31 | 2005-02-02 | Bridgestone Corp | An automobile tyre |
| JP4499467B2 (ja) * | 2004-04-15 | 2010-07-07 | 株式会社ブリヂストン | 空気入りタイヤ |
| EP1759890B1 (en) * | 2004-06-23 | 2009-11-11 | Bridgestone Corporation | Pneumatic tire |
| JP4989023B2 (ja) | 2004-11-19 | 2012-08-01 | 住友ゴム工業株式会社 | 重荷重用タイヤ |
| EP2151334B1 (en) * | 2007-05-28 | 2014-09-10 | Bridgestone Corporation | Tire |
-
2009
- 2009-02-06 JP JP2009026207A patent/JP5231275B2/ja active Active
-
2010
- 2010-01-26 US US13/148,204 patent/US9254720B2/en not_active Expired - Fee Related
- 2010-01-26 CN CN201080011156XA patent/CN102348562B/zh not_active Expired - Fee Related
- 2010-01-26 WO PCT/JP2010/000425 patent/WO2010089969A1/ja not_active Ceased
- 2010-01-26 EP EP10738312.7A patent/EP2394824B1/en not_active Not-in-force
- 2010-01-26 ES ES10738312.7T patent/ES2579960T3/es active Active
- 2010-01-26 BR BRPI1008112A patent/BRPI1008112A2/pt active Search and Examination
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3196920A (en) * | 1964-03-16 | 1965-07-27 | Louis Fishman & Co Inc | Tire construction |
| JPS62292509A (ja) * | 1986-06-11 | 1987-12-19 | Bridgestone Corp | 重荷重用空気入りラジアルタイヤ |
| JPH11222014A (ja) * | 1998-02-05 | 1999-08-17 | Sumitomo Rubber Ind Ltd | 重荷重用ラジアルタイヤ |
| JP2007083822A (ja) | 2005-09-21 | 2007-04-05 | Bridgestone Corp | 空気入りタイヤ |
| JP2007191093A (ja) | 2006-01-20 | 2007-08-02 | Bridgestone Corp | 建設車両用タイヤ |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2394824A4 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9038681B2 (en) | 2010-10-22 | 2015-05-26 | Bridgestone Corporation | Heavy load pneumatic tire for construction vehicles |
| JP5727502B2 (ja) * | 2010-10-22 | 2015-06-03 | 株式会社ブリヂストン | 建設車両用重荷重空気入りタイヤ |
| WO2013051053A1 (ja) * | 2011-10-03 | 2013-04-11 | 株式会社ブリヂストン | 重荷重用空気入りタイヤ |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2579960T3 (es) | 2016-08-17 |
| EP2394824A1 (en) | 2011-12-14 |
| JP2010179813A (ja) | 2010-08-19 |
| US20120006455A1 (en) | 2012-01-12 |
| EP2394824A4 (en) | 2013-06-19 |
| EP2394824B1 (en) | 2016-04-13 |
| JP5231275B2 (ja) | 2013-07-10 |
| US9254720B2 (en) | 2016-02-09 |
| CN102348562A (zh) | 2012-02-08 |
| BRPI1008112A2 (pt) | 2016-03-15 |
| CN102348562B (zh) | 2013-11-27 |
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