阅读说明：本技术 充气轮胎 (Pneumatic tire ) 是由 岸添勇 于 2018-05-22 设计创作，主要内容包括：在该充气轮胎(1)中,花纹块(4)在踏面具备多个凹凸部(6)。此外,凹凸部(6)的凹凸量Hc在0.1mm≤Hc≤1.0mm的范围内。此外,凹凸部(6)的宽度Wc在0.1mm≤Wc≤0.8mm的范围内。将相邻的凹凸部(6)的配置间隔Dc在Dc≤1.2mm的范围内的区域定义为凹凸区域(A1),在凹凸区域(A1)以外的区域,将花纹块(4)的踏面的算术平均粗糙度Ra在Ra≤50μm的范围内的区域定义为平滑区域(A2),定义与轮胎宽度方向垂直的剖面X,定义轮胎宽度方向上的花纹块(4)的踏面的宽度方向长度Wb。此时,花纹块(4)在花纹块(4)的踏面的宽度方向长度Wb的40％以上的宽度方向范围内的任意的剖面X处,分别具有凹凸区域(A1)和平滑区域(A2)。(In the pneumatic tire (1), pattern block (4) has multiple bumps (6) in tyre tread.In addition, the concavo-convex amount Hc of bump (6) is in the range of 0.1mm≤Hc≤1.0mm.In addition, the width Wc of bump (6) is in the range of 0.1mm≤Wc≤0.8mm.Region of the configuration space Dc of adjacent bump (6) in the range of Dc≤1.2mm is defined as relief region (A1), region other than relief region (A1), region of the arithmetic average roughness Ra of the tyre tread of pattern block (4) in the range of Ra≤50 μm is defined as smooth region (A2), the section X vertical with tire width direction is defined, the width direction length Wb of the tyre tread of the pattern block (4) on tire width direction is defined.At this point, pattern block (4) is respectively provided with relief region (A1) and smooth region (A2) at the arbitrary section X within the scope of 40% or more the width direction of the width direction length Wb of the tyre tread of pattern block (4).)

1. a kind of pneumatic tire has multiple pattern blocks in tread surface, which is characterized in that

The pattern block has multiple bumps in tyre tread,

The concavo-convex amount Hc of the bump in the range of 0.1mm≤Hc≤1.0mm,

The width Wc of the bump in the range of 0.1mm≤Wc≤0.8mm,

Region of the configuration space Dc of adjacent bump in the range of Dc≤1.2mm is defined as relief region,

Region other than the relief region, by the arithmetic average roughness Ra of the tyre tread of the pattern block in Ra≤50 μm Region in range is defined as smooth region,

The section X vertical with tire width direction is defined,

The width direction length Wb of the tyre tread of the pattern block on tire width direction is defined, also,

The pattern block is within the scope of 40% or more the width direction of the width direction length Wb of the tyre tread of the pattern block At arbitrary section X, it is respectively provided with the relief region and the smooth region.

2. pneumatic tire according to claim 1, wherein

The smooth region is configured between the adjacent relief region.

3. pneumatic tire according to claim 1 or 2, wherein

The smooth region is respectively arranged between three or more the relief regions.

4. pneumatic tire according to any one of claim 1 to 3, wherein

For the width W1 of the relief region in the range of 1.0mm≤W1, the width W2 of the smooth region is 2.0mm≤W2's In range.

5. pneumatic tire according to any one of claim 1 to 4, wherein

The width W2 of the width W1 of the relief region and the smooth region adjacent with the relief region have 0.50≤ The relationship of W1/W2≤1.50.

6. pneumatic tire according to any one of claim 1 to 5, wherein

The length Lb ' of the tyre tread of the pattern block on the summation ∑ W1 and section X of the width W1 of the relief region has The relationship of 0.20≤∑ W1/Lb '.

7. pneumatic tire according to any one of claim 1 to 6, wherein

The length Lb ' of the tyre tread of the pattern block on the summation ∑ W2 and section X of the width W2 of the smooth region has The relationship of 0.20≤∑ W2/Lb '.

8. pneumatic tire according to any one of claim 1 to 7, wherein

The area ratio of the bump in the relief region is in the range below 20% or more 45%.

9. pneumatic tire according to any one of claim 1 to 8, wherein

The width Wc and configuration space Dc of the bump in the relief region have the relationship of 0.80≤Dc/Wc.

10. pneumatic tire according to any one of claim 1 to 9, wherein

The configuration space Dc of the bump in the relief region and the width W2 of the smooth region have 4.0≤W2/ The relationship of Dc.

11. pneumatic tire according to any one of claim 1 to 10, wherein

The relief region has the shape of strip, also, the long dimension direction of the relief region on tire width direction Center line and tire width direction angulation θ in the range of -15deg≤θ≤15deg.

12. pneumatic tire according to any one of claim 1 to 11, wherein

The relief region extends along the edge part of the tire circumferential direction of the tyre tread of the pattern block.

13. pneumatic tire according to any one of claim 1 to 11, wherein

The smooth region extends along the edge part of the tire width direction of the tyre tread of the pattern block.

14. pneumatic tire according to any one of claim 1 to 13, wherein

The bump is narrow shallow slot.

Technical field

The present invention relates to a kind of pneumatic tires, more specifically, are related to a kind of wheel that can be improved when beginning to use new tire The pneumatic tire of the performance on ice of tire.

Background technique

Typically, since the function of the script of tread-rubber cannot be suitably played when beginning to use new tire, Accordingly, there exist cannot suitably obtain performance on ice.Therefore, in studless tire in recent years, in order to appropriate Performance on ice when ground ensures to begin to use new tire, by multiple narrow shallow slot configurations on pattern block tyre tread.Narrow shallow slot and cutter groove Decorative pattern is shallow compared to very, has the groove depth in the degree of the abrasion initial stage disappearance of tire.It is taken as the existing of related composition Pneumatic tire, there is known documented technologies in patent document 1.

Summary of the invention

Problems to be solved by the invention

The purpose of the present invention is to provide a kind of inflations of performance on ice that can improve tire when beginning to use new tire Tire.

Technical solution

In order to achieve the above objectives, pneumatic tire of the invention is a kind of inflation for having multiple pattern blocks in tread surface Tire, which is characterized in that the pattern block has multiple bumps in tyre tread, the concavo-convex amount Hc of the bump 0.1mm≤ In the range of Hc≤1.0mm, the width Wc of the bump, will be adjacent described recessed in the range of 0.1mm≤Wc≤0.8mm Region of the configuration space Dc of protrusion in the range of Dc≤1.2mm is defined as relief region, other than the relief region The region for the range that the arithmetic average roughness Ra of the tyre tread of the pattern block is Ra≤50 μm is defined as smooth area by region Domain defines the section X vertical with tire width direction, defines the width side of the tyre tread of the pattern block on tire width direction To length Wb, also, the pattern block is in 40% or more the width side of the width direction length Wb of the tyre tread of the pattern block To at the arbitrary section X of range, it is respectively provided with the relief region and the smooth region.

Beneficial effect

In pneumatic tire of the invention, formed since the tyre tread of pattern block has by the fine bump intensively configured Relief region, therefore, relief region absorbs and removes the moisture film on deicing road surface.Further, since the tyre tread of pattern block have it is flat Smooth region therefore can ensure that contact area of the pattern block relative to ice road surface.Also, due to relief region and smooth area Therefore domain mixed configuration can improve bonding frictional force of the smooth region relative to ice road surface.Have as a result, and improves pattern block phase For the grounding characteristics on ice road surface, and the advantages of synergistically improve the performance on ice of tire.

Detailed description of the invention

Fig. 1 is the sectional view for indicating the tyre equatorial direction of the pneumatic tire of embodiments of the present invention.

Fig. 2 is the top view for indicating the tread surface of pneumatic tire documented by Fig. 1.

Fig. 3 is the top view for indicating the tyre tread of pattern block documented by Fig. 2.

Fig. 4 is the enlarged drawing for indicating the tyre tread of pattern block documented by Fig. 3.

Fig. 5 is to indicate the X of the tyre tread of pattern block documented by Fig. 4 to sectional view.

Fig. 6 is the P-P of bump documented by Fig. 4 to sectional view.

Fig. 7 is the Q of bump documented by Fig. 4 to sectional view.

Fig. 8 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Fig. 9 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 10 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 11 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 12 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 13 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 14 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 15 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 16 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 17 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 18 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 19 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 20 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 21 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 22 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 23 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.

Figure 24 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 25 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 26 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 27 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 28 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 29 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 30 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 31 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 32 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 33 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 34 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 35 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.

Figure 36 is the explanatory diagram for indicating the improvement of bump documented by Fig. 5 and Fig. 6.

Figure 37 is the explanatory diagram for indicating the improvement of bump documented by Fig. 5 and Fig. 6.

Figure 38 is the explanatory diagram for indicating the improvement of bump documented by Fig. 5 and Fig. 6.

Figure 39 is the explanatory diagram for indicating the improvement of bump documented by Fig. 5 and Fig. 6.

Figure 40 is the top view for indicating the improvement of tread surface documented by Fig. 2.

Figure 41 is the top view for indicating the tyre tread of pattern block documented by Figure 40.

Figure 42 is the top view for indicating the tyre tread of pattern block documented by Figure 40.

Figure 43 is the top view for indicating the tyre tread of pattern block documented by Figure 40.

Figure 44 is the chart for indicating the result of the performance test of pneumatic tire of embodiments of the present invention.

Specific embodiment

Hereinafter, referring to attached drawing, the present invention is described in detail.It should be noted that the present invention is not by present embodiment Restriction.In addition, including maintaining the identity of invention and capable of replacing and can obviously set in the constituent element of present embodiment The element changed.In addition, in present embodiment documented multiple improvements can to those skilled in the art show and Any combination is carried out in the range of being clear to.

[pneumatic tire]

Fig. 1 is the sectional view for indicating the tyre equatorial direction of the pneumatic tire of embodiments of the present invention.This is illustrated The sectional view of one side region of tire radial direction.In addition, an example as pneumatic tire, the figure shows car rotating radials Tire.

In the figure, the section in tyre equatorial direction refers to include the plane cutting of tire rotary shaft (illustration omitted) Section when tire.In addition, symbol CL is equatorial plane, refers to and passed through simultaneously from the central point of the tire of tire rotary axis direction The plane vertical with tire rotary shaft.In addition, tire width direction refers to the direction parallel with tire rotary shaft, tire is radially Refer to the direction vertical with tire rotary shaft.

The pneumatic tire 1 has the ring-shaped structure centered on tire rotary shaft, has: a pair of bead core 11,11；It is a pair of Bead-core 12,12；Body piles 13；Belt 14；Tread-rubber 15；A pair of sidewalls rubber 16,16；And a pair of of rim cushion rubber Glue 17,17 (referring to Fig.1).

A pair of bead core 11,11 is annular component made of a plurality of steel bead wire of binding, constitutes the core of left and right bead part.One The tire outer radial periphery of a pair of bead core 11,11 is respectively arranged to bead-core 12,12 and constitutes bead part.

Body piles 13 are with multilayer made of the monolayer constructions or laminated multi-layer casing ply formed comprising one layer of casing ply Construction, is annularly erected between left and right bead core 11,11 and constitutes the skeleton of tire.In addition, the both ends of body piles 13 with It is locking to encase the mode of bead core 11 and bead-core 12 rollback on the outside of tire width direction.In addition, the cord of body piles 13 Layer is to cover to be made of steel or organic fibrous material (for example, aramid fiber, nylon, polyester, artificial silk etc.) by coating rubber A plurality of body cord and carry out rolling processing and constitute, have absolute value in 80deg or more 95deg carcass angle below (inclination angle of the machine direction of body cord relative to tire circumferential direction).

Belt 14 is laminated by a pair of cross banding 141,142 with banding coating 143, to be enclosed in body piles 13 The mode of periphery configure.A pair of cross banding 141,142 is covered by coating rubber by steel or organic fibrous material The a plurality of belt cord of composition simultaneously carries out rolling processing and constitutes, and has absolute value in 20deg or more 55deg band beam angle below Degree.In addition, (machine direction of belt cord is opposite for belt angle of a pair of cross banding 141,142 with contrary sign each other In the inclination angle of tire circumferential direction), so that the machine direction of belt cord is intersected and (oblique construction) is laminated.Banding coating 143 pairs of a plurality of cords being made of steel or organic fibrous material using coating rubber covering carry out rolling processing and constitute, and And have absolute value in 0deg or more 10deg belt angle below.In addition, banding coating 143 is configured to be layered in intersection The tire radial outside of banding 141,142.

Tread-rubber 15 is configured at the tire outer radial periphery of body piles 13 and belt 14, constitutes the fetus face of tire. A pair of sidewalls rubber 16,16 is respectively arranged on the outside of the tire width direction of body piles 13, constitutes left and right sides wall portion.A pair of of wheel rim Yielding rubber 17,17 is respectively arranged at the tire radial direction inner side in the rollback portion of left and right bead core 11,11 and body piles 13, constitutes The contact surface of left and right bead part and rim flange.

[tread contour]

Fig. 2 is the top view for indicating the tread surface of pneumatic tire documented by Fig. 1.As an example, the figure shows slots It is arranged as the simple tread contour of clathrate.In the figure, tire circumferentially refers to around the direction of tire rotary shaft.In addition, Symbol T is tire ground terminal.

As shown in Fig. 2, the flower that pneumatic tire 1 has multiple slot 2a, 2b and marked off by these slots 2a, 2b in fetus face Line block 4.

Slot 2a, 2b are the slots for defining pattern block 4, the groove depth of groove width and 3.0mm or more with 2.0mm or more.

Slot is measured as in the case where tire to be secured to regulation wheel rim and fills the no load condition of regulation internal pressure for groove width The maximum value of the distance of left and right cell wall at opening portion.Ring shore edge part have notch, corner portion composition in, In When using slot length direction as the observation of the section view of normal direction, using the intersection point of tyre surface tyre tread and the extended line of cell wall as measuring point, come Measure groove width.In addition, slot tire be circumferentially serrated or the composition of wavy extension in, with the center line of the amplitude of cell wall For measuring point, to measure groove width.

Groove depth is measured as in the case where tire to be secured to regulation wheel rim and fills the no load condition of regulation internal pressure From tyre surface tyre tread to the maximum value of the distance of slot bottom.In addition, having bump, the composition of siping of part in slot bottom with regard to slot For, groove depth will be determined except them.

Regulation wheel rim refers to that as defined in JATMA " applicable wheel rim ", " Design Rim (take turns by design as defined in TRA Rim) " or as defined in ETRTO " Measuring Rim (measurement wheel rim) ".Furthermore, it is specified that internal pressure refers to is provided by JATMA " highest air pressure ", " the TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES as defined in TRA The maximum value of (the loading of tire limit under various cold inflation pressures) " or " INFLATION as defined in ETRTO PRESSURES (the blowing pressure) ".In addition, ordinance load refers to as defined in JATMA " maximum loadability ", as defined in TRA It the maximum value of " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES " or is advised by ETRTO Fixed " LOAD CAPACITY (load-bearing capacity) ".Wherein, in JATMA, it is specified that internal pressure is in the case where passenger car tire Air pressure 180kPa is, it is specified that load is the 88% of maximum loadability.

Pattern block 4 is the ring shore marked off by slot 2a, 2b with above-mentioned defined groove width and groove depth, in tire Ground area have tyre tread.In addition, pattern block 4 can have siping 5 (referring to aftermentioned Fig. 3) in tyre tread, it can also be with There is corner portion, notch (illustration omitted) in edge part.In addition, pattern block 4 can also be above-mentioned with being not included in tyre tread The stria and shallow slot (illustration omitted) of slot 2a, 2b.

The tyre tread of pattern block is defined within the region (i.e. the ground area of tire) between left and right tire ground terminal T, T The outer surface of pattern block.

Tire ground terminal T is defined as: tire is secured to regulation wheel rim and applies regulation internal pressure, while with stationary state phase When being disposed vertically for plate and applying load corresponding with ordinance load, the tire axial of the contact surface of tire and plate is most Big width position.

Moreover it is preferred that the width direction length Wb of pattern block 4 is relative to tyre contact width TW, in 0.10≤Wb/ In the range of TW.Suitably ensure the ground width (saving the dimension mark in sketch map) of pattern block 4 as a result,.

For the width direction length Wb of pattern block, it is measured as and tire is being installed in regulation wheel rim, is assigning regulation internal pressure While in the non-loaded state when tire width direction on pattern block tyre tread maximum width.

For tyre contact width TW, it is measured as the maximum distance of the tire axial of left and right tire ground terminal.

For example, slot 2a is circumferential major trough in the composition of Fig. 2, continuously extend throughout tire complete cycle.In addition, having Four circumferential major trough 2a of rectilinear form are arranged bilaterally symmetrically centered on equatorial plane CL.In addition, slot 2b is that perforation is horizontal Groove penetrates through tread surface along tire width direction and is open in left and right tire ground terminal T.In addition, being arranged by multiple slot 2a, 2b It is classified as clathrate and is interconnected, five column pattern blocks column are marked off on tire width direction.

Major trough refers to the slot of the display function of the wear indicator with JATMA defined, the groove width with 4.0mm or more And the groove depth of 6.5mm or more.

It should be noted that, as described above, slot 2a has rectilinear form, but it is not limited to this, slot in the composition of Fig. 2 2a also can have the zigzag fashion extended while circumferentially bending or be bent along tire or waved configuration (omits Diagram).

[siping of pattern block]

Fig. 3 is the top view for indicating the tyre tread of pattern block documented by Fig. 2.The figure shows by slot 2a, 2b (referring to Fig. 2) The pattern block 4 of the monomer marked off.

As shown in figure 3, pattern block 4 is respectively provided with multiple siping 5 in the pneumatic tire 1.Pass through these cutter grooves flower The marginal element of line 5, pattern block 4 increases, and the performance on ice and snow performance of tire improve.

Siping is formed at the grooving of ring shore, has siping width and 2.0mm or more less than 1.0mm Sipe depth, as a result, tire be grounded when occlude.It should be noted that the upper limit of sipe depth is not special It limits, but generally more shallow than the groove depth of major trough.

For siping width, it is measured as and tire is being secured to regulation wheel rim and is filling the zero load shape of regulation internal pressure Under state, the maximum value of the opening width of the siping of the tyre tread of ring shore.

For sipe depth, it is measured as and tire is being secured to regulation wheel rim and is filling the zero load shape of regulation internal pressure Under state, from tyre surface tyre tread to the maximum value of the distance at siping bottom.In addition, having the bumps of part in slot bottom with regard to siping For the composition in portion, sipe depth will be determined except them.

In addition, siping 5 can also include enclosed type construction (the reference figure that both ends are terminated in the inside of pattern block 4 3), the end of a side pattern block 4 edge part opening and the end of another party pattern block 4 inside terminate it is semi-enclosed Construct any structure of (illustration omitted) and both ends in the open configuration (illustration omitted) that the edge part of pattern block 4 is open It makes.In addition, length, the piece number and the configuration structure of the siping 5 in pattern block 4 can be well known to those skilled in the art In the range of suitably select.In addition, siping 5 can along tire width direction, tire it is circumferential and to their inclined sides Any direction in extends.

For example, a pattern block 4 has multiple siping 5 in the composition of Fig. 3.In addition, these siping 5 have The enclosed type construction for thering are both ends to terminate in the inside of pattern block 4, in addition, having the zigzag extended along tire width direction Shape.In addition, in the circumferentially spaced specified interval of tire the configuration side by side of siping 5, in addition, with the central portion of pattern block 4 For the left and right region on boundary, the group configured with two column siping 5.

[bump of pattern block]

Fig. 4 is the enlarged drawing for indicating the tyre tread of pattern block documented by Fig. 3.Fig. 5 indicates pattern block documented by Fig. 4 The X of tyre tread is to sectional view.Fig. 6 and Fig. 7 is to indicate the P-P of bump documented by Fig. 4 to sectional view (Fig. 6) and Q to cuing open Face figure (Fig. 7).In these figures, Fig. 4 and Fig. 5 shows the configuration structure of the bump 6 in the tyre tread of pattern block 4, Fig. 6 with And Fig. 7 shows the section shape of the depth direction of bump 6.

As shown in figure 3, pattern block 4 has multiple and fine bumps 6 in tyre tread.

Bump 6 is formed at the fine surface processing department of the tyre tread of pattern block 4.Specifically, bump 6 includes narrow The fine protrusion such as the fine recess portion such as shallow slot, fine pit (dimple) and fine thin rib, fine protrusion. On the other hand, bump 6 does not include for example deep stria, the siping occluded when tire is grounded, deep pit, notch Deng.It should be noted that conceptually, the pit with strip construction is equivalent to slot, the protrusion with strip construction is suitable In rib.

In above-mentioned composition, since the tyre tread of pattern block 4 has the fine bump 6 intensively configured, decorative pattern Block 4 is improved relative to the grounding characteristics on ice road surface, and the performance on ice of tire improves.Specifically, (1) is fine in bump 6 Recess portion in the case where, on ice road surface when driving, bump 6 absorbs and goes the moisture film on deicing road surface.Pattern block 4 as a result, Tyre tread is improved relative to the adaptation (so-called bonding frictional force) on ice road surface, the property on ice of tire when beginning to use new tire It can improve.In addition, (2), in the case where bump 6 is fine protrusion, bump 6 is worn away in early days, promotes pattern block 4 Tyre tread initial stage abrasion.The grounding characteristics that tread-rubber can suitably be played as a result, tire when beginning to use new tire Performance improves on ice.

In addition, the concavo-convex amount Hc (referring to Fig. 6 and Fig. 7) of bump 6 is preferably in the range of 0.1mm≤Hc≤1.0mm, more It is preferred that in the range of 0.2mm≤Hc≤0.6mm.By above-mentioned lower limit and the upper limit, suitably ensure the work of fine bump 6 With.

For the concavo-convex amount Hc of bump, the maximum being measured as from plane to the outer surface of bump of pattern block tyre tread is deep Spend the distance of position or maximum height position.Specifically, bump is most in the case where bump is fine recess portion Measuring point of the big depth location as concavo-convex amount Hc (referring to Fig. 6).In addition, in the case where bump is fine protrusion, it is recessed The maximum height position of protrusion becomes the measuring point (illustration omitted) of concavo-convex amount Hc.

In addition, the width Wc (referring to Fig. 4 and Fig. 6) of bump is preferably in the range of 0.1mm≤Wc≤0.8mm, it is more excellent It is selected in the range of 0.2mm≤Wc≤0.5mm.By above-mentioned lower limit and the upper limit, suitably ensure the work of fine bump 6 With.

For the width Wc of bump, using the intersection point of the outer surface of the plane of pattern block tyre tread and bump as measuring point It is measured.Specifically, width Wc is to be stepped on bump relative to pattern block in the case where bump is fine recess portion The opening edge of the plane in face is measuring point to be measured (referring to Fig. 6).In addition, the case where bump is fine protrusion Under, width Wc is measured using the rising portions of the side wall of the bump in the plane of pattern block tyre tread as measuring point.In addition, In the case that the aspect ratio of bump in pattern block tyre tread is 1.50 or more, i.e., there is the case where strip construction in bump Under, for the width Wc of bump, the maximum for being measured as the bump on the direction orthogonal with the long dimension direction of bump is wide Degree (referring to Fig. 4).In addition, for the width Wc of bump, being measured as recessed in the case where the aspect ratio of bump is less than 1.50 The maximum outside diameter of protrusion.

For example, the bump 6 of pattern block 4 is made of narrow shallow slot in the composition of Fig. 3.In addition, multiple narrow shallow slots are intensively matched It sets, forms the band-like region A1 being made of one group of narrow shallow slot.In addition, multiple regions A1 is with long dimension direction towards tyre width The mode in direction is along the circumferential configuration side by side of tire.In addition, do not have narrow shallow slot region A2 be configured at adjacent region A1, A1 it Between.In addition, the region A1 that is made of one group of narrow shallow slot and the region A2 without narrow shallow slot are alternately arranged along prescribed direction.By This, one group of narrow shallow slot is configured to striated on the tyre tread of pattern block 4.It should be noted that about these regions A1, A2, In It is described hereinafter.

In addition, in the top view of the tyre tread of pattern block 4, narrow shallow slot has rectilinear form in the composition of Fig. 4.But It is not limited to this, narrow shallow slot can have arc-shaped, wavy, other curved shapes, it is possible to have V shape, zigzag, rank Scalariform, other bending shapes (illustration omitted).

In addition, narrow shallow slot integrally has fixed width Wc and depth H c in the composition of Fig. 4 (referring to Fig. 6).But It is, however it is not limited to which this, the width Wc and depth H c of bump 6 can also change (illustration omitted).

In addition, the groove width Wc of narrow shallow slot is preferably in 0.1mm or more 0.8mm range below, more preferably in 0.3mm or more 0.6mm range below.By above-mentioned lower limit, the moisture film removal effect of narrow shallow slot can ensure that.In addition, by the above-mentioned upper limit, energy Ensure the rigidity of the ground area between adjacent narrow shallow slot.

In addition, the groove depth Hc of narrow shallow slot is preferably in 0.1mm or more 1.0mm range below, more preferably in 0.2mm or more 0.5mm range below.By above-mentioned lower limit, the moisture film removal effect of narrow shallow slot can ensure that.By the above-mentioned upper limit, phase can ensure that The rigidity of ground area between adjacent narrow shallow slot.Especially since narrow shallow slot has the groove depth Hc more shallow than siping 5, Therefore, become the state for not occluding and keeping opening when pattern block 4 is grounded.It can ensure that as a result, narrow shallow when pattern block 4 is grounded The moisture film removal of slot acts on.

In addition, the long dimension direction of narrow shallow slot is circumferential with defined inclination angle (province relative to tire in the composition of Fig. 4 Dimension mark in sketch map) inclination.The inclination angle of the narrow shallow slot is preferably in the range of 20deg or more 70deg or less, more preferably In the range of 30deg or more 60deg or less.The moisture film on the ice road surface that can suitably ensure to be realized by narrow shallow slot as a result, removes Effect.It should be noted that being measured as the straight of the left and right end portions of one continuous narrow shallow slot of connection for the inclination angle of narrow shallow slot Angle formed by line and tire circumferential direction.

In addition, constituting one group of narrow shallow slot of region A1 in the composition of Fig. 4 with fixed spacing and (saving the size in sketch map Label) it is arranged.But, however it is not limited to this, the spacing of narrow shallow slot can also change (illustration omitted).In addition, narrow shallow slot Spacing is preferably in 0.5mm or more 2.0mm range below, more preferably in 0.7mm or more 1.4mm range below.By above-mentioned Lower limit can ensure that the rigidity of pattern block 4.By the above-mentioned upper limit, the configuration density of narrow shallow slot can ensure that, can ensure that the water of narrow shallow slot Film removal effect.It should be noted that for the spacing of narrow shallow slot, the width Wc of aftermentioned narrow shallow slot and adjacent may be calculated The sum of configuration space Dc of narrow shallow slot.

In addition, as shown in figs.5 and 6, in the sectional view in groove width direction, narrow shallow slot has the section shape of arc-shaped Shape.But, however it is not limited to this, narrow shallow slot also can have rectangular-shaped section shape (illustration omitted).In addition, the slot of narrow shallow slot Depth can slowly reduce in the terminal part of narrow shallow slot (referring to Fig. 7), stepped can also reduce (illustration omitted).

[relief region and smooth region]

Here, the region by the configuration space Dc (referring to Fig. 6) of adjacent bump 6,6 in the range of Dc≤1.2mm It is defined as relief region A1.That is, relief region A1 is defined as the configuration of the one group of bump 6 intensively configured with narrow configuration space Region.It can suitably ensure the moisture film removal effect of the bump 6 in relief region A1 as a result,.

Distance of the configuration space Dc of bump between adjacent bump is come with the bump adjacent to each other arbitrarily organized It is measured respectively.In addition, being to survey with the intersection point of the outer surface of the plane of pattern block tyre tread and bump for configuration space Dc It pinpoints to be measured (referring to Fig. 6).

In addition, the configuration space Dc of bump 6 and the width Wc of bump 6 preferably have 0.80 in relief region A1 The relationship of≤Dc/Wc, more preferably with the relationship of 1.50≤Dc/Wc.Namely it is preferred that adjacent bump 6,6 is discontinuous, Flat plane is formed between adjacent bump 6,6.Thus, it is ensured that the contact area of the inside of relief region A1, recessed The grounding characteristics of convex domain A1 itself improve.It should be noted that than the condition of Dc/Wc because of the upper limit Dc of above-mentioned configuration space Dc ≤ 1.2mm and be restricted.

In addition, the area ratio of the bump 6 in relief region A1 is in the range preferably below 20% or more 45%, it is more excellent It is selected in 25% or more 40% or less range.It can more suitably ensure that the moisture film of the bump 6 in relief region A1 is gone as a result, Except effect.

For the area ratio of bump, it is calculated as in the top view of the tyre tread of pattern block 4, area shared by bump The area ratio of summation and relief region A1 entirety.For example, in the case where bump 6 is recess portion, the summation of opening area The area ratio of bump is calculated as with the area ratio of relief region A1 entirety.

In addition, the region other than above-mentioned relief region A1, by the arithmetic average roughness Ra of the tyre tread of pattern block 4 in Ra Region in the range of≤50 μm is defined as smooth region A2.That is, smooth region A2 be defined as do not have slot, siping and The flat region of fine bump.Smooth region A2 is the tyre tread in order to suitably ensure the pattern block 4 when tire is grounded It is configured with the contact area on road surface.

Arithmetic average roughness Ra is measured according to JIS B0601.

Smooth region A2 can have the flat tyre tread that surface processing is not carried out, it is possible to have implementing distribution has The tyre tread of the surface processing of hemispherical many microspikes.In the processing of surface, the maximum height of microspike is at 1 μm or more In 50 μm or less of range, in addition, the maximum outside diameter of microspike is in 1 μm or more 50 μm or less of range.In addition, adjacent The equispaced at the top of microspike is preferably in 5 μm or more 100 μm or less of range.In addition, most for microspike Big height and maximum outside diameter, using microspike and the intersection point of the planar portions of pattern block tyre tread as measuring point, such as using aobvious Micro mirror is measured.

In addition, the tyre tread of pattern block 4 may include being not belonging to any of above-mentioned relief region A1 and smooth region A2 Intermediate region.Therefore, relief region A1 and smooth region A2 can adjoin each other (referring to Fig. 3), can also be between them With intermediate region A3 (illustration omitted).

Specifically, having the allocation position less than 0.1mm and the bump 6 of the concavo-convex amount Hc more than 50 μm (i.e. local Configuring area) be not included in any of above-mentioned relief region A1 and smooth region A2 (illustration omitted).For the bumps The allocation position in portion 6 cannot suitably obtain the moisture film removal effect of the bump 6 in above-mentioned relief region A1, in addition, cannot Obtain the effect of the contact area of the tyre tread and road surface that suitably ensure the pattern block 4 in above-mentioned smooth region A2.

Similarly, the bump 6 of the width Wc with the concavo-convex amount Hc for being more than 1.0mm or more than 0.8mm is (for example, deep Stria, notch, siping etc.) allocation position do not constitute above-mentioned relief region A1 and smooth region A2.It is recessed for this The allocation position of protrusion 6 cannot obtain the function of the script of the bump 6 at the abrasion initial stage of tire, in addition, 6 remaining of bump To abrasion mid-term.

In addition, even if bump 6 have it is above-mentioned as defined in concavo-convex amount Hc and width Wc in the case where, in bump 6 In the case that configuration space Dc is more than 1.2mm, i.e., in the case where dispersing in bump 6 and sparsely configure, bump 6 is not constituted Above-mentioned relief region A1.The moisture film that the individual bump 6 being distributed can not be obtained suitably in above-mentioned relief region A1 is gone Except effect.

The boundary line of relief region A1 proceeds as follows mapping (referring to Fig. 4).Firstly, in the vertical view of pattern block tyre tread In figure, the flat face with the width for being more than 1.2mm is selected.Then, the face flat relative to this is extracted with above-mentioned rule The bump 6 of fixed concavo-convex amount Hc and width Wc further select intensively configure with above-mentioned defined configuration space Dc one Group bump 6.Then, the outermost end and edge of selected one group of bump 6 are connected with linear line segment, are led to It crosses smooth straight line or curve and carrys out the set of these approximate line segments, and map to the boundary line of relief region A1.In addition, It maps to the contour line of other bumps (for example, deep stria, notch, siping etc.) in region, from bumps It is excluded in the A1 of region.

The boundary line of smooth region A2 proceeds as follows mapping (referring to Fig. 4).Firstly, being extracted from pattern block tyre tread The region that relief region A1 is excluded further selects the arithmetic average roughness Ra of pattern block tyre tread in the model of Ra≤50 μm Enclose interior region.Then, the outer rim that selected region is connected with linear line segment, by smooth straight line or curve come The set of these approximate line segments, maps to the boundary line of smooth region A2.In addition, to other bump (examples in region Such as, deep stria, notch, siping etc.) contour line map, excluded from smooth region A2.

In addition, defining the section X vertical with tire width direction.

At this point, the width of 40% or more (preferably 50% or more) in the width direction length Wb of the tyre tread of pattern block 4 At the arbitrary section X of direction scope, relief region A1 and smooth region A2 mixed configuration.Therefore, in the tyre tread of pattern block 4 Within the scope of defined width direction, relief region A1 and smooth region A2 mixed configuration.

Above-mentioned width direction range can be continuous, can also be discontinuous.Therefore, pattern block is being scanned along tire width direction Tyre tread when, within the scope of total 40% or more of width direction length Wb width direction, section X meets above-mentioned condition i.e. It can.

In addition, at the arbitrary section X of above-mentioned width direction range, it is preferred that the width W1 of relief region A1 exists In the range of 1.0mm≤W1, the width W2 of smooth region A2 is in the range of 2.0mm≤W2, more preferably in 3.0mm≤W1 In the range of≤8.0mm and 4.0mm≤W2≤10.0mm.Relief region A1 and smooth region A2 can be effectively played as a result, Effect.

Width W1, the W2 in region are measured on section X.In addition, in relief region A1 and smooth region A2 include Between in the case where the A3 of region, the width after subtracting the width of intermediate region A3 is calculated as width W1, the W2 in region.

In addition, in the above-described configuration, the width W1 of relief region A1 and the smooth region A2 adjacent with relief region A1 Width W2 preferably there is the relationships of 0.50≤W1/W2≤1.50, the relationship (ginseng more preferably with 0.70≤W1/W2≤1.20 According to Fig. 3).Namely it is preferred that width W1, W2 of relief region A1 adjacent to each other and smooth region A2 be set at essentially it is identical. It can effectively obtain the mixed configuration based on relief region A1 and smooth region A2 as a result, and bring acts on.

In addition, the width W2 of the configuration space Dc and smooth region A2 of the bump 6 in relief region A1 preferably have 4.0 The relationship of≤W2/Dc, the relationship more preferably with 8.0≤W2/Dc (referring to Fig. 4).It can suitably obtain based on embossed area as a result, The mixed configuration of domain A1 and smooth region A2 and bring act on.The upper limit than W2/Dc is not particularly limited, but because of other conditions And it is restricted.

In addition, the length Lb ' of the tyre tread of the pattern block 4 on the summation ∑ W1 and section X of the width W1 of relief region A1 is excellent The relationship with 0.20≤∑ W1/Lb ' is selected, more preferably with the relationship of 0.40≤∑ W1/Lb '.Similarly, smooth region A2 The length Lb ' of the tyre tread of pattern block 4 on the allocation position of the summation ∑ W2 and smooth region A2 of width W2 preferably has 0.20 The relationship of≤∑ W2/Lb ', more preferably with the relationship of 0.40≤∑ W2/Lb '.Circumferential model as defined in capable of suitably ensuring as a result, The overall width of relief region A1 and smooth region A2 in enclosing.The upper limit than ∑ W1/Lb ' and ∑ W2/Lb ' is not particularly limited, But it is restricted because of other conditions.

It is no load condition while being measured as tire being installed in regulation wheel rim, assign regulation internal pressure for length Lb ' When pattern block tyre tread maximum length.

In above-mentioned composition, (1) is made of since the tyre tread of pattern block 4 has the fine bump 6 intensively configured Relief region A1, therefore, relief region A1 can absorb and remove the moisture film on deicing road surface.Further, since the tyre tread of pattern block 4 has Therefore standby flat smooth region A2 can ensure that contact area of the pattern block 4 relative to ice road surface.Also, due to relief region A1 and smooth region A2 mixed configuration, therefore, smooth region A2 are improved relative to the bonding frictional force on ice road surface.Decorative pattern as a result, Block 4 is improved relative to the grounding characteristics on ice road surface, and the performance on ice of tire synergistically improves.

In particular, (2), in vehicle braking/driving, the tyre tread of pattern block 4 is circumferentially slided along tire and is connect with ice road surface Ground.At this point, since relief region A1 and smooth region A2 is circumferential (that is, on section X vertical with tire width direction) in tire Mixed configuration, therefore, by the synergistic effect of relief region A1 and smooth region A2, the grounding characteristics of pattern block 4 are improved.By This, efficiently improves the braking ability on ice and driveability on ice of tire.

For example, in the composition of Fig. 3, relief region A1 and smooth region A2 are on tire width direction with the band of strip Columnar structure.In addition, relief region A1 and smooth region A2 is with the rectangular-shaped of fixed width W1, W2.In addition, relief region A1 and smooth region A2 continuously prolongs from end to the end of another party of a side of the tire width direction of the tyre tread of pattern block 4 It stretches, along the tyre tread of the crosscutting pattern block 4 of tire width direction.

In addition, in Fig. 3, the center line and wheel of the long dimension direction of the relief region A1 of strip on tire width direction Tire width direction angulation θ is preferably in the range of -15deg≤θ≤15deg, more preferably in -10deg≤θ≤10deg In the range of.Change the angle, θ of the long dimension direction of relief region A1 suitably, suitably to ensure relief region A1's Function.

In addition, multiple relief region A1 are along the circumferential configuration side by side of tire in the composition of Fig. 3.In addition, adjacent embossed area A1, A1 are separated from each other in domain.In addition, being each configured with smooth region A2 between adjacent relief region A1, A1.In addition, decorative pattern The tyre tread of block 4 has four relief region A1 and three smooth region A2, these relief regions A1 and smooth region A2 are along tire Circumferentially it is alternately arranged.In addition, relief region A1 is respectively arranged at the left and right side edge of the tire circumferential direction of the tyre tread of pattern block 4.This Outside, multiple relief region A1 have fixed width W1, in addition, being configured at the smooth area between adjacent relief region A1, A1 Domain A2 has fixed width W2.

In above-mentioned composition, smooth region A2 is configured between adjacent relief region A1, A1, adjacent recessed as a result, Convex domain A1, A1 are before and after smooth region A2 or left and right absorbs the moisture film on ice road surface.Smooth region A2 is relative to ice as a result, The bonding frictional force on road surface improves, and the performance on ice of tire further increases.Moreover, because three or more relief region A1 will Smooth region A2 is clipped between respectively and arranges in striated, therefore, bonding frictional force of the smooth region A2 relative to ice road surface It further increases.

[improvement]

Fig. 8 to Figure 23 is the explanatory diagram for indicating the improvement of tyre tread of pattern block documented by Fig. 3.In these figures, right In constituent element identical with constituent element documented by Fig. 3, identical symbol is assigned, and the description thereof will be omitted.

For example, in the composition of Fig. 3, as described above, relief region A1 and smooth region A2 have on tire width direction There is the banded structure of strip.In addition, relief region A1 and smooth region A2 is from the one of the tire width direction of the tyre tread of pattern block 4 End to the end of another party of side continuously extends, along the tyre tread of the crosscutting pattern block 4 of tire width direction.

In contrast, in the composition of Fig. 8, relief region A1 is shorter than the width direction length Wb of the tyre tread of pattern block 4, matches It is placed in the central portion of the tyre tread of pattern block 4 and extends along tire width direction.In addition, the tire width direction of relief region A1 Both ends pattern block 4 tyre tread inside terminate.In addition, tyre width of the relief region A1 along the tyre tread of pattern block 4 The edge part of the front and back in direction extends.Like this, it can be relief region A1 not stepping on along the crosscutting pattern block 4 of tire width direction Face.In addition it is also possible to be, adjacent smooth region A2, A2 are mutually continuous.

On the other hand, in the composition of Fig. 9, smooth region A2 is shorter than the width direction length Wb of the tyre tread of pattern block 4, matches It is placed in the central portion of the tyre tread of pattern block 4 and extends along tire width direction.In addition, the tire width direction of smooth region A2 Both ends pattern block 4 tyre tread inside terminate.In addition, tyre width of the relief region A1 along the tyre tread of pattern block 4 The edge part of the front and back in direction extends.Like this, it can be smooth region A2 not stepping on along the crosscutting pattern block 4 of tire width direction Face.In addition it is also possible to be, adjacent relief region A1, A1 is mutually continuous.

In addition, relief region A1 is shorter than the width direction length Wb of the tyre tread of pattern block 4, in flower in the composition of Figure 10 Tire width direction configuration is biased on the tyre tread of line block 4.In addition, the end of a side of the tire width direction of relief region A1 exists The edge part of one side of the tire width direction of the tyre tread of pattern block 4 terminates, and the end of another party is in the tyre tread of pattern block 4 Portion terminates.In addition, smooth region A2 extends along the edge part of another party of the tire width direction of the tyre tread of pattern block 4.

In addition, the central portion in the composition of Fig. 3 in the tyre tread of pattern block 4 is along tyre width side in the composition of Figure 11 To segmentation relief region A1.In other words, billet and a pair of of relief region A1, A1 is mutually opposed along tire width direction and discretely Configuration.In addition, the edge of a side of the relief region A1 of a side from the internal stretch of the tyre tread of pattern block 4 to tire width direction Portion, the edge part of the another party of the relief region A1 of another party from the internal stretch of the tyre tread of pattern block 4 to tire width direction. In addition, multiple groups relief region A1, A1 arranges at predetermined intervals in tire circumferential direction.In addition, adjacent smooth region A2, A2 are in flower The central portion of line block 4 is mutually continuous.It should be noted that be also possible in the composition of Figure 11, in the tyre tread of pattern block 4 More specifically central portion is formed with circumferential stria (illustration omitted) between the relief region A1 of left and right.It is circumferential thin by this Slot can be such that the earth contact pressure of the tyre tread of pattern block 4 homogenizes.

In addition, in the composition of Figure 12, billet and multiple relief region A1 are circumferentially upper in zigzag configuration in tire.This Outside, list of the end of a side of the tire width direction of these relief regions A1 in the tire width direction of the tyre tread of pattern block 4 The edge part of side terminates, and the end of another party is terminated in the inside of the tyre tread of pattern block 4.Similarly, billet and multiple smooth areas Domain A2 is circumferentially upper in zigzag configuration in tire.In addition, the end of a side of the tire width direction of these smooth regions A2 exists The unilateral edge part of the tire width direction of the tyre tread of pattern block 4 terminates, and the end of another party is in the tyre tread of pattern block 4 Portion terminates.In addition, in the composition of Figure 12, adjacent relief region A1, A1 in tire circumferential direction and tire width direction not It is overlapped, and it is mutually butted corner, and in the circumferentially upper cross-shaped arrangement of tire.But, however it is not limited to this, adjacent is recessed Convex domain A1, A1 can the overlapped and cross-shaped arrangement in tire circumferential direction or tire width direction, can also take turns It is separated from each other in tire circumferential direction or tire width direction and cross-shaped arrangement (illustration omitted).

In addition, in the composition of Figure 13, billet and multiple relief region A1 are arranged as clathrate.In addition, a part is concave-convex Region A1 extends to the edge part of the tire width direction of the tyre tread of pattern block 4.Similarly, billet and multiple smooth region A2 row It is classified as clathrate.In addition, a part of smooth region A2 extends to the edge part of the tire width direction of the tyre tread of pattern block 4.This Outside, a part of smooth region A2 is configured at the edge part of the tire circumferential direction of the tyre tread of pattern block 4.It should be noted that in Figure 13 Composition in, by the number of permutations of the arrangement of relief region A1 and smooth region the A2 clathrate constituted on tire width direction Four arrange and arrange in tire circumferential upper six to constitute, and but it is not limited to this, can also be three column or five on tire width direction It more than column, can also be arranged for three to more than five column or seven column in tire circumferential direction.Like this, the number of permutations of the arrangement of clathrate It is not particularly limited, but is restricted because of other conditions.

In addition, multiple relief region A1 of billet and width direction length having the same are in tire in the composition of Fig. 8 Aligned position and along the circumferential configuration side by side of tire in width direction.Similarly, in the composition of Fig. 9, billet and having the same Multiple smooth region A2 of width direction length aligned position and along the circumferential configuration side by side of tire on tire width direction.

But, however it is not limited to this, be also possible to as shown in figure 14, billet and width direction length having the same it is multiple Relief region A1 positional shift and along the circumferential configuration side by side of tire on tire width direction.It is equally possible that being such as Figure 15 It is shown, multiple smooth region A2 of billet and width direction length having the same positional shift and edge on tire width direction The circumferential configuration side by side of tire.

In addition, multiple relief region A1 of width direction length having the same are along tire in the composition of Fig. 3 and Fig. 8 Circumferential configuration side by side.Similarly, in the composition of Fig. 3 and Fig. 9, multiple smooth region A2 of width direction length having the same Along the circumferential configuration side by side of tire.

But, however it is not limited to this, it is also possible to as shown in figure 16, it is multiple recessed with mutually different width direction length Convex domain A1a, A1b are along the circumferential configuration side by side of tire.For example, in the composition of Figure 16, in the center of the tire circumferential direction of pattern block 4 Portion region is configured with the relief region A1a of billet, is configured with the embossed area of strip in the end regions of the tire circumferential direction of pattern block 4 Domain A1b.In addition, being not limited to this, it is also possible to be configured with the bumps of strip in the central portion region of the tire circumferential direction of pattern block 4 Region A1b is configured with the relief region A1a (illustration omitted) of billet in the end regions of the tire circumferential direction of pattern block 4.In addition, It is also possible to the tyre tread that three or more relief region A1 are configured at pattern block 4, the width direction length of these relief regions A1 Successively decrease from a direction of the tire circumferential direction of pattern block 4 towards other direction or is incremented by (illustration omitted).

It is equally possible that being multiple smooth regions with mutually different width direction length as shown in figure 17 A2a, A2b are along the circumferential configuration side by side of tire.For example, in the composition of Figure 17, in the central portion region of the tire circumferential direction of pattern block 4 Smooth region A2a configured with billet is configured with the smooth region A2b of strip in the end regions of the tire circumferential direction of pattern block 4. In addition, being not limited to this, it is also possible to be configured with the smooth region of strip in the central portion region of the tire circumferential direction of pattern block 4 A2b is configured with the smooth region A2a (illustration omitted) of billet in the end regions of the tire circumferential direction of pattern block 4.In addition, can also To be, three or more relief region A1 are configured at the tyre tread of pattern block 4, the width direction length of these smooth regions A2 is from flower Successively decrease towards other direction or be incremented by (illustration omitted) in one direction of the tire circumferential direction of line block 4.

In addition, multiple relief region A1 with width W1 same to each other are circumferentially arranged side by side along tire in the composition of Fig. 3 Configuration.In addition, the smooth region A2 with width W2 same to each other is configured between adjacent relief region A1, A1.

But, however it is not limited to this, it is also possible to as shown in Figure 18 and Figure 19, it is multiple recessed with mutually different width W1 Convex domain A1 is along the circumferential configuration side by side of tire.In addition it is also possible to be, the smooth region A2 with mutually different width W2 is configured Between adjacent relief region A1, A1.

For example, being configured in the central portion region of the tire circumferential direction of pattern block 4 has narrow width in the composition of Figure 18 The relief region A1a of W1a is configured with the relief region with wide width W1b in the end regions of the tire circumferential direction of pattern block 4 A1b.In addition, being configured at adjacent relief region A1a, A1a if being conceived to；Smooth region A2a, A2b between A1a, A1b, then It is configured with the smooth region A2a with narrow width W2a in the central portion region of the tire circumferential direction of pattern block 4, in pattern block 4 The end regions of tire circumferential direction are configured with the smooth region A2b with wide width W2b.But, however it is not limited to this, it can also be with It is, in the central portion region of the tire circumferential direction of the pattern block 4 relief region A1 wide configured with width, in the tire week of pattern block 4 To end regions configured with the narrow relief region A1 (illustration omitted) of width.In addition, about adjacent relief region is configured at Smooth region A2 between A1, A1 is also possible to wide configured with width in the central portion region of the tire circumferential direction of pattern block 4 Smooth region A2, in the end regions of the tire circumferential direction of the pattern block 4 smooth region A2 (illustration omitted) narrow configured with width.

In addition it is also possible to be as shown in figure 19, three or more relief region A1a~A1d are configured at stepping on for pattern block 4 Face, width W1a~W1d of these relief regions A1a~A1d is from a direction of the tire circumferential direction of pattern block 4 towards other direction Successively decrease or is incremented by.In addition it is also possible to be, three or more smooth region A2a~A2c are respectively arranged at adjacent relief region Between A1a~A1d, the direction court of width W2a~W2c of these smooth regions A2a~A2c from the tire circumferential direction of pattern block 4 Successively decrease to other direction or is incremented by.

In addition, in the composition of Fig. 3, as described above, relief region A1 is respectively arranged at the tire week of the tyre tread of pattern block 4 To left and right side edge.

But, however it is not limited to this is also possible to as shown in figure 20, and smooth region A2 is respectively arranged at the tyre tread of pattern block 4 Tire circumferential direction left and right side edge.In addition it is also possible to be, the tire that relief region A1 is configured at the tyre tread of pattern block 4 is circumferential A side edge part, smooth region A2 is configured at the edge part (illustration omitted) of another party.

In addition, four relief region A1 that smooth region A2 is clipped in the middle are throughout pattern block 4 in the composition of Fig. 3 The whole region of the tire circumferential direction of tyre tread it is alternately arranged.

But, however it is not limited to this, as shown in Figure 21 to Figure 23, at least a pair of of embossed area that smooth region A2 is clipped in the middle Domain A1, A1 are configured at the tyre tread of pattern block 4.At this point, being also possible to as shown in figure 21, a pair of of relief region A1 is biased to decorative pattern The region of one side of the tire circumferential direction of the tyre tread of block 4 configures.In addition it is also possible to be wide a pair of width as shown in figure 22 Relief region A1 is configured at the central portion region of the tire circumferential direction of the tyre tread of pattern block 4.Furthermore, it is also possible to be as shown in figure 23, Wide a pair of of relief region A1, A1 of width is configured at the left and right side edge of the tire circumferential direction of the tyre tread of pattern block 4, single smooth area Domain A2 is configured between these relief regions A1, A1.

In addition, in the composition of Fig. 3, as described above, pattern block 4 has multiple siping 5, these siping 5 with Relief region A1 and smooth region A2 intersect.But, however it is not limited to this, it also can be omitted the siping 5 of pattern block 4 (illustration omitted).In addition it is also possible to be, in pattern block 4, instead of siping 5 or with siping 5 together on tyre tread With stria, notch, chamfering (illustration omitted).

Figure 24 to Figure 35 is the enlarged drawing for indicating the improvement of configuration structure of bump documented by Fig. 4.In these figures In, for constituent element identical with constituent element documented by Fig. 4, identical symbol is assigned, and the description thereof will be omitted.

In the composition of Fig. 4, as described above, the boundary line of relief region A1 and smooth region A2 are straight line, relief region A1 and smooth region A2 integrally has rectangular-shaped (referring to Fig. 3).

But, however it is not limited to this, it is also possible to relief region A1 and smooth region A2 with arbitrary shape.That is, as above It is described, select one group of bumps that there is defined concavo-convex amount Hc and width Wc and intensively configure with defined configuration space Dc Portion 6 connects the outermost end and edge of this group of bump 6 by linear line segment, by smooth straight line or Person's curve carrys out the set of these approximate line segments, to map to the boundary line of relief region A1.Therefore, in one group of bump In 6 compositions for mutually staggering end position to be arranged, the boundary line of relief region A1 can have bending shape or curved Curved shape.

For example, as shown in figure 24, what relief region A1 and smooth region A2 can have in tire circumferential direction with amplitude Zigzag fashion, or also can have waved configuration (illustration omitted).In addition, as shown in figure 25, relief region A1 and smooth Region A2 can have in the circumferentially upper curved circular shape of tire, or also can have bending shape (illustration omitted).

In addition, in the composition of Fig. 4, relief region A1 and smooth region A2 are on tire width direction with the band of strip Columnar structure, (θ=0) parallel with tire width direction extend (referring to Fig. 3).In addition, relief region A1 and smooth region A2 have Fixed width W1, W2.

But, however it is not limited to this, it is also possible to as shown in figure 26, the long dimension direction of relief region A1 and smooth region A2 It is tilted relative to tire width direction.But, as described above, the center line and tyre width of the long dimension direction of relief region A1 Direction angulation θ is preferably in the range of -15deg≤θ≤15deg.

In addition it is also possible to be that as shown in figure 27, width W1, W2 of relief region A1 and smooth region A2 are towards tyre width Direction change.For example, in the composition of Figure 27, towards a side of tire width direction, the width W1 monotone decreasing of relief region A1 Small, the width W2 dullness of smooth region A2 increases.But, however it is not limited to this, the width W1 of relief region A1 can be from embossed area The central portion of the long dimension direction of domain A1 increases towards both ends, also can reduce (illustration omitted) on the contrary.In addition it is also possible to It is that width W1, W2 of relief region A1 and smooth region A2 are all towards the long dimension direction of relief region A1 and smooth region A2 Phase property increases and decreases (illustration omitted).

In addition, adjacent relief region A1, A1 is separated from each other in the composition of Fig. 4.Therefore, the boundary line phase in each region Non-cross ground is independent.

But, however it is not limited to this is also possible to as shown in FIG. 28 and 29, and adjacent relief region A1, A1 is mutually continuous. In other words, smooth region A2 can also be configured between a continuous relief region A1.

For example, a part of bump 6 extends and is formed with interconnecting piece (saving the symbol in sketch map) in the composition of Figure 28, Central portion of adjacent relief region A1, A1 via the interconnecting piece in long dimension direction connects.In addition, multiple bumps 6 are even It is intensively configured at socket part with defined configuration space Dc, interconnecting piece itself is functioned as relief region A1 as a result,.Therefore, Adjacent relief region A1, A1 integrally has H shape.As described above, width W1, W2 of relief region A1 and smooth region A2 by Arbitrary section X definition within the scope of defined width direction.Therefore, concave-convex in the interconnecting piece of adjacent relief region A1, A1 The width W1 of region A1 increases, and the width W2 of smooth region A2 becomes zero.

On the other hand, in the composition of Figure 29, relief region A1, A1 passes through 6 part of bump of monomer at multiple positions Ground connection.It is fully functioned since the bump 6 of the monomer cannot function as relief region A1, it is defined as being not belonging to The intermediate region A3 of any of relief region A1 and smooth region A2.

In addition, as shown in figure 30, having the item for the bump 6 for being unsatisfactory for constituting relief region A1 in the tyre tread of pattern block 4 In the case where other bumps 7 (for example, deep stria, notch, siping etc.) of part, relief region A1 and smooth region A2 is defined as removing the region of other bumps 7.For example, other bumps 7 perforation first is concave-convex in the composition of Figure 30 Region A1 and smooth region A2 intersects with the second relief region A1 and is terminated.In this case, by along other bumps 7 The boundary line of outer rim define intermediate region A3.Intermediate region A3 is not belonging to appointing in relief region A1 and smooth region A2 One.For example, the first relief region A1 and smooth region A2 are truncated by intermediate region A3, in addition, second in the composition of Figure 30 A part of relief region A1 is corroded by intermediate region A3.

In addition, in the composition of Fig. 4, as described above, constituting the long dimension direction phase of one group of bump 6 of relief region A1 For tire width direction with defined inclination angle (saving the dimension mark in sketch map) inclination.In addition, each bump 6 is in embossed area It is continuous in the A1 of domain.In addition, bump 6 is narrow shallow slot in the composition of Fig. 4.

But, however it is not limited to this, it is also possible to as shown in figure 31, constitute the one group of bump 6 and tire of relief region A1 Circumferential substance extends vertically.Specifically, the long dimension direction of bump 6 and tire circumferential direction angulation are preferably super It crosses in the range of 70deg and 90deg or less.For example, all bumps 6 and tire are circumferential vertically in the composition of Figure 31 Extend.In this composition, the one group of bump 6 intensively configured with defined narrow configuration space Dc is selected, along these bumps The outer rim of outermost bump 6 in portion 6 maps to the boundary line of relief region A1.In addition, between wide configuration Region between the adjacent bump 6,6 of Dc configuration is defined as smooth under conditions of with defined flat tyre tread Region A2.

In addition it is also possible to be that as shown in figure 32, the circumferential essence of one group of bump 6 and tire of composition relief region A1 is mild-natured Extend capablely.Specifically, the long dimension direction of bump 6 and tire circumferential direction angulation preferably 0deg more than and less than In the range of 20deg.For example, all bumps 6 are circumferentially extended parallel to tire in the composition of Figure 32.

In addition it is also possible to be that as shown in figure 33, bump 6 is divided in relief region A1.For example, in the composition of Figure 33 In, the bump 6 in relief region A1 is the narrow shallow slot of billet, and not transversal relief region A1 has extremely in relief region A1 The end of a few side.

In addition it is also possible to be, as shown in figure 34, bump 6 is pit.For example, in the composition of Figure 34, bump 6 is With shallow depth (concavo-convex amount Hc.Referring to the pit of the dome shape or cylindrical shape of Fig. 6) and small outer diameter (width Wc). In addition, one group of bump 6 is with defined configuration space Dc dense arrangement, moreover, being in tire circumferential direction and tire width direction Staggered arrangement.Then, by these bumps 6, band-like relief region A1 is formed.In addition, adjacent relief region A1, Smooth region A2 is formed between A1.

In addition it is also possible to be as shown in figure 35, in the composition of Figure 34, configured with concave-convex from constituting in smooth region A2 The isolated bump 6 come out of one group of bump 6 of region A1.That is, matching in the isolated bump 6 come out and one group of bump 6 It sets in the biggish situation of interval D c, the isolated bump 6 come out is not included in any in relief region A1 and smooth region A2 It is a, constitute intermediate region A3.It should be noted that multiple bumps 6 in smooth region A2 are close with narrow configuration space Dc In the case where collection configuration (illustration omitted), these bumps 6 form a relief region A1.

Figure 36 to Figure 39 is the explanatory diagram for indicating the improvement of bump documented by Fig. 5 and Fig. 6.

In the composition of Fig. 3, as shown in Figures 5 and 6, bump 6 is narrow shallow slot.

But, however it is not limited to this is also possible to as shown in Figure 36 and Figure 37, and bump 6 is with defined concavo-convex amount Hc And the protrusion (for example, thin rib or kick) of width Wc.In addition it is also possible to be one group of bump 6 as shown in Figure 38 and Figure 39 Including recess portion and this both sides of protrusion.It in this case, also can be by one group of bump 6 with defined configuration space Dc dense arrangement To form relief region A1.It should be noted that as shown in figure 39, in the composition that recess portion 6a and protrusion 6b is mixed, institute as above It states, their width Wc (Wc_a, Wc_b) and concavo-convex amount Hc (Hc_a, Hc_b) is with the flat region in the tyre tread of pattern block 4 On the basis of be measured.

Figure 40 is the top view for indicating the improvement of tread surface documented by Fig. 2.The figure shows winters without nail The tread surface of non-skid tyre.In addition, Figure 41 to Figure 43 is the top view for indicating the tyre tread of pattern block documented by Figure 40.These It shows by the pattern block 4 of slot 2c, 2d (referring to Figure 40) monomer marked off.In addition, in these figures, for Fig. 2 institute The identical constituent element of the constituent element of record, assigns identical symbol, and the description thereof will be omitted.

In the composition of Fig. 2, slot 2a is circumferential major trough, is extended continuously throughout tire complete cycle.In addition, slot 2b is that perforation is horizontal Groove penetrates through tread surface along tire width direction and is open in left and right tire ground terminal T.In addition, multiple slot 2a, 2b have rule Fixed groove width and groove depth, clathrate arrangement are simultaneously interconnected.Five column pattern blocks are marked off on tire width direction as a result, Column.

In contrast, in the composition of Figure 40, slot 2c is the inclination band slot relative to tire peripheral, oblique, red from tire Road face CL nearby increases the inclination angle relative to tire circumferential direction periodically to extend towards tire ground terminal T.In addition, slot 2c For major trough, the display function with wear mark as defined in JATMA.In addition, multiple slot 2c are connected in V shape, it is formed with direction Property tread contour.In addition, slot 2d is to be configured at fetus face shoulder zone along the circumferential slot of tire circumferentially extending, connect adjacent Slot 2c, 2c.Also, there is defined groove width and groove depth by these slots 2c, 2c, mark off a variety of pattern block 4A, 4B, 4C.

In the composition of Figure 41, pattern block 4A is located on tire ground terminal T, by a pair of angled band slot 2c, 2c and circumferential direction Slot 2d is divided (referring to Figure 40).In addition, pattern block 4A integrally has the rectangle or trapezoidal shape being slightly distorted.In addition, pattern block The tyre tread of 4A, i.e. ground area are divided by tire ground terminal T, in addition, being formed with multiple bumps on the tyre tread of pattern block 4A 6.In addition, one group of bump 6 forms length with defined configuration space Dc (referring to Fig. 4) dense arrangement on tire width direction The band-like relief region A1 of item.In addition, multiple relief region A1 are in the circumferentially upper configuration side by side of tire.In addition, adjacent recessed Smooth region A2 is configured between convex domain A1, A1.In addition, multiple siping 5 along tire width direction extend and with bumps Region A1 and smooth region A2 intersects.It should be noted that relief region A1 is only formed in be connect than tire in the composition of Figure 41 The region of ground terminal T in the inner part, but it is not limited to this, and relief region A1 can also be formed in the area than tire ground terminal T in the outer part Domain, i.e., ungrounded region (illustration omitted).

In the composition of Figure 42, pattern block 4B is located at fetus face middle section, by a pair of angled band slot 2c, 2c and circumferential direction Slot 2d is divided (referring to Figure 40).In addition, pattern block 4B has the substantially parallel quadrilateral shape of strip, and make its long dimension direction phase For tire peripheral, oblique.In addition, the tyre tread in pattern block 4B is formed with multiple bumps 6.In addition, one group of bump 6 is to advise Fixed configuration space Dc (referring to Fig. 4) dense arrangement, is formed with the band-like relief region A1 of strip on tire width direction. In addition, multiple relief region A1 are configured side by side along the long dimension direction of pattern block 4B.In addition, adjacent relief region A1, Smooth region A2 is configured between A1.In addition, multiple siping 5 are along tire width direction extension and peaceful with relief region A1 Skating area domain A2 intersects.Pattern block 4B has the stria 7a and notch 7b deeper than bump 6.In addition, these strias 7a and notch Portion 7b intersects with relief region A1 and smooth region A2.

In the composition of Figure 43, pattern block 4C is on equatorial plane CL, by multiple inclination band slot 2c and circumferential slot 2d It marks off (referring to Figure 40).In addition, pattern block 4C has the shape generally L-shaped of connection strip parts and billet portion, in its strip parts Extend relative to tire peripheral, oblique and along tire width direction, in its billet portion along equatorial plane CL in tire circumferential direction Extend.In addition, the tyre tread in pattern block 4C is formed with multiple bumps 6.In addition, one group of bump 6 is with defined configuration space Dc (referring to Fig. 4) dense arrangement, is formed with the band-like relief region A1 of strip on tire width direction.In addition, multiple recessed Convex domain A1 is configured side by side along the long dimension direction of pattern block 4C.In addition, being configured between adjacent relief region A1, A1 Smooth region A2.In addition, multiple siping 5 extend along tire width direction and hand over relief region A1 and smooth region A2 Fork.Pattern block 4C has the stria 7a and notch 7b deeper than bump 6.In addition, these strias 7a and notch 7b and bumps Region A1 and smooth region A2 intersects.

[effect]

As described above, the pneumatic tire 1 has multiple pattern blocks 4 in tread surface (referring to Fig. 2).In addition, pattern block 4 exists Tyre tread has multiple bumps 6 (referring to Fig. 3).In addition, the concavo-convex amount Hc (referring to Fig. 6) of bump 6 0.1mm≤Hc≤ In the range of 1.0mm.In addition, the width Wc (referring to Fig. 4) of bump 6 is in the range of 0.1mm≤Wc≤0.8mm.It will be adjacent The configuration space Dc of bump 6 be defined as relief region A1 in the region of the range of Dc≤1.2mm, other than relief region A1 Region, the arithmetic average roughness Ra of the tyre tread of pattern block 4 is defined as smooth region in the region of the range of Ra≤50 μm A2 defines the section X vertical with tire width direction, defines the width direction of the tyre tread of the pattern block 4 on tire width direction Length Wb.At this point, arbitrary within the scope of 40% or more the width direction of the width direction length Wb of the tyre tread of pattern block 4 At section X, pattern block 4 is respectively provided with relief region A1 and smooth region A2 (referring to Fig. 3 and Fig. 4).

In this composition, (1) is made of since the tyre tread of pattern block 4 has the fine bump 6 intensively configured recessed Convex domain A1, therefore, relief region A1 can absorb and remove the moisture film on deicing road surface.Further, since the tyre tread of pattern block 4 have it is flat Therefore smooth smooth region A2 can ensure that contact area of the pattern block 4 relative to ice road surface.Also, due to relief region A1 and Smooth region A2 mixed configuration, therefore, smooth region A2 are improved relative to the bonding frictional force on ice road surface.There is decorative pattern as a result, Block 4 is improved relative to the grounding characteristics on ice road surface, and the advantages of synergistically improve the performance on ice of tire.

In particular, (2), in braking/driving of vehicle, the tyre tread of pattern block 4 is circumferentially slided along tire and is connect with ice road surface Ground.At this point, since relief region A1 and smooth region A2 is circumferential (that is, on section X vertical with tire width direction) in tire Mixed configuration, therefore, by the synergistic effect of relief region A1 and smooth region A2, the grounding characteristics of pattern block 4 are improved.By This, efficiently improves the braking ability on ice and driveability on ice of tire.

In addition, (3) constitute concavo-convex amount Hc, width Wc and the configuration space Dc of the bump 6 of relief region A1 above-mentioned In numberical range, there is the advantages of moisture film absorption that can suitably ensure relief region A1 as a result,.These numberical range mistakes The big or too small moisture film absorption that can all make relief region A1 reduces.

In addition, the lower limit of width W1, W2 of (4) relief region A1 and smooth region A2 is deposited as a result, in above-mentioned range The advantages of can suitably ensure the above-mentioned effect of relief region A1 and smooth region A2.

In addition, smooth region A2 is configured between adjacent relief region A1, A1 (referring to figure in the pneumatic tire 1 3).In this composition, adjacent relief region A1, A1 absorbs the moisture film on ice road surface in the two sides of smooth region A2.Exist as a result, Smooth region A2 is improved relative to the bonding frictional force on ice road surface, and the advantages of further increase the performance on ice of tire.

In addition, smooth region A2 is respectively arranged between three or more relief region A1 (ginseng in the pneumatic tire 1 According to Fig. 3).That is, smooth region A2 is clipped between respectively by three or more relief region A1 within the scope of defined width direction And it is arranged as striated.There is the advantages of smooth region A2 is further increased relative to the bonding frictional force on ice road surface as a result,.

In addition, the width W1 of relief region A1 is in the range of 1.0mm≤W1, smooth region A2 in the pneumatic tire 1 Width W2 in the range of 2.0mm≤W2 (referring to Fig. 3).Relief region A1 and smooth region can be ensured respectively by existing as a result, Width W1, W2 of A2, and the advantages of can ensure that the function of relief region A1 and smooth region A2.

In addition, in the pneumatic tire 1, the width W1 and the smooth region adjacent with relief region A1 of relief region A1 The width W2 of A2 has the relationship of 0.50≤W1/W2≤1.50 (referring to Fig. 3).In this composition, relief region adjacent to each other Width W1, W2 of A1 and smooth region A2 be set to it is roughly the same, as a result, in the presence of can effectively obtain by relief region A1 and The advantages of effect that the mixed configuration of smooth region A2 is realized.

In addition, in the pneumatic tire 1, pattern block 4 on the summation ∑ W1 and section X of the width W1 of relief region A1 Relationship of the length Lb ' of tyre tread with 0.20≤∑ W1/Lb ' (referring to Fig. 3).Defined width can suitably be ensured by existing as a result, The advantages of spending the overall width ∑ W1 of the relief region A1 in direction scope.

In addition, in the pneumatic tire 1, pattern block 4 on the summation ∑ W2 and section X of the width W2 of smooth region A2 Relationship of the length Lb ' of tyre tread with 0.20≤∑ W2/Lb ' (referring to Fig. 3).Defined width can suitably be ensured by existing as a result, The advantages of spending the overall width ∑ W2 of the smooth region A2 in direction scope.

In addition, the area ratio of the bump 6 in relief region A1 is below 20% or more 45% in the pneumatic tire 1 In the range of.There is the advantages of moisture film removal effect that can more suitably ensure the bump 6 in relief region A1 as a result,.

In addition, the width Wc and configuration space Dc of the bump 6 in relief region A1 have in the pneumatic tire 1 The relationship of 0.80≤Dc/Wc (referring to Fig. 4).There is the contact area for the inside that can ensure that relief region A1, and embossed area as a result, The advantages of grounding characteristics of domain A1 itself improve.

In addition, in the pneumatic tire 1, the configuration space Dc's and smooth region A2 of the bump 6 in relief region A1 Relationship of the width W2 with 4.0≤W2/Dc (referring to Fig. 4).Existing as a result, can suitably obtain by relief region A1 and smooth area The advantages of effect that the mixed configuration of domain A2 is realized.

In addition, relief region A1 has the shape of strip on tire width direction, and recessed in the pneumatic tire 1 The center line and tire width direction angulation θ of the long dimension direction of convex domain A1 are in -15deg≤θ≤15deg range Interior (referring to Fig. 3).Existing as a result, changes the angle, θ of the long dimension direction of relief region A1 suitably, and can suitably ensure bumps The advantages of function of region A1.

In addition, relief region A1 prolongs along the edge part of the tire circumferential direction of the tyre tread of pattern block 4 in the pneumatic tire 1 It stretches (referring to Fig. 3).The drainage that there is the tyre tread of pattern block 4 as a result, improves, and the braking ability on ice of tire and turns on ice The advantages of performance improves.

In addition, in the pneumatic tire 1, smooth region A2 along the tire width direction of the tyre tread of pattern block 4 edge Portion extends (referring to Figure 20).The contact area that there is pattern block 4 as a result, increases, and the braking ability on ice of tire and turns on ice The advantages of curved performance improves.

In addition, bump 6 is narrow shallow slot (referring to Fig. 4 to Fig. 7) in the pneumatic tire 1.In this composition, due to recessed Protrusion 6 is constructed with strip, therefore, compared with the composition (referring to Figure 34) for the pit that bump 6 is billet, is existed and is efficiently obtained The advantages of obtaining the water removal effect of bump 6.