CN104768774B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN104768774B CN104768774B CN201380057588.8A CN201380057588A CN104768774B CN 104768774 B CN104768774 B CN 104768774B CN 201380057588 A CN201380057588 A CN 201380057588A CN 104768774 B CN104768774 B CN 104768774B
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- CN
- China
- Prior art keywords
- tire
- groove
- circumferential
- land portion
- major trough
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C11/1218—Three-dimensional shape with regard to depth and extending direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0346—Circumferential grooves with zigzag shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0348—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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C2011/1254—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern with closed sipe, i.e. not extending to a groove
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The present invention provides a kind of pneumatic tire (1), the multiple land portions (31~33) being divided into at least 4 circumferential major troughs (21,22) circumferentially extended to tire and by them.It is also equipped with：First band groove (41), its insertion central land portion (31) on tire width direction；Circumferential stria (23), its configuration circumferentially extends on tire-shoulder land portion (33) to tire；Second band groove (43), from circumferential stria (23) to tire width direction, inner side extends for it, and in outermost circumferential major trough (22) upper shed；And the 3rd band groove (44), from circumferential stria (23) to tire width direction, outside extends for it, in tyre surface end opening, and is configured relative to second band groove (43) staggered positions in tire circumference.First band groove (41) is open with perspective structure with meander-shaped relative to the left and right circumferential major trough (21,22) for dividing central land portion (31).
Description
Technical field
The present invention relates to a kind of pneumatic tire, more specifically, it is related in a kind of performance on ice for improving tire and snow
The pneumatic tire of performance.
Background technology
In terms of pickup truck studless tire, exist and be intended to the performance on ice and snow performance that improve tire
Problem, employs the traction decorative pattern with multiple pattern block row at present, and the plurality of pattern block row have groove.As with the problem
Related conventional pneumatic, it is known to the technology that patent document 1 is recorded.
Additionally, it is known that there is the technology described in patent document 2, although used for the load-carrying in truck, bus etc.
Tire, but the pneumatic tire has the tread contour approximate with the present application.
Prior art literature
Patent document
【Patent document 1】Japanese Patent Laid-Open 2004-26158 publications
【Patent document 2】Japanese Patent Laid-Open 2011-31885 publications
The content of the invention
The problem that invention is intended to solve
The performance on ice of tire and the pneumatic tire of snow performance are improved it is an object of the invention to provide a kind of.
To reach above-mentioned purpose, pneumatic tire involved in the present invention, it has at least 4 week circumferentially extended to tire
The multiple land portions divided to major trough and by the circumferential major trough, it is characterised in that will be positioned at tire width direction
The outermost left and right circumferential major trough is referred to as outermost circumferential major trough, will the outermost circumferential major trough to be located closer to tire wide
The land portion on the inside of degree direction is referred to as central land portion, at the same will the outermost circumferential major trough to be located closer to tire wide
When the land portion on the outside of degree direction is referred to as tire-shoulder land portion, it has：First band groove, it is passed through on tire width direction
Lead to the central land portion；Circumferential stria, its configuration circumferentially extends in the tire-shoulder land portion to tire；Second band groove,
From the circumferential stria to tire width direction, inner side extends for it, and in the outermost circumferential major trough opening；And the 3rd band
Groove, from the circumferential stria to tire width direction, outside extends for it, in tyre surface end opening, and is configured to relative to described the
Two band grooves, the staggered positions in tire circumference, and the first band groove has meander-shaped, while with perspective structure phase
For the left and right circumferential major trough opening for dividing the central land portion.
Invention effect
According to pneumatic tire involved in the present invention, the first band groove has perspective structure, so have that tire can be improved
Performance on ice and snow performance advantage.
Brief description of the drawings
Fig. 1 is the profile in the tyre equatorial direction for showing pneumatic tire described in the embodiment of the present invention.
Fig. 2 is the plan of the fetus face for showing the pneumatic tire described in Fig. 1.
Fig. 3 is the enlarged drawing in the central land portion for showing the tread contour described in Fig. 2.
Fig. 4 is the enlarged drawing in the tire-shoulder land portion for showing the tread contour described in Fig. 2.
Fig. 5 is an explanatory diagram for example for showing three-dimensional groove.
Fig. 6 is an explanatory diagram for example for showing three-dimensional groove.
Fig. 7 is the chart of the performance test results for showing pneumatic tire described in the embodiment of the present invention.
Fig. 8 is the explanatory diagram of the pneumatic tire for showing conventional example.
Fig. 9 is the explanatory diagram of the pneumatic tire for showing comparative example.
Specific embodiment
Describe the present invention in detail with reference to the accompanying drawings.In addition, the present invention is not limited to the present embodiment.Additionally, this reality
In applying the inscape of example, containing while the homogeneity of invention is maintained, the content that can be replaced and easily replace.This
Outward, multiple described in the present embodiment improve examples, can those skilled in the art can realize in the range of be combined.
Pneumatic tire
Fig. 1 is the profile in the tyre equatorial direction for showing pneumatic tire described in the embodiment of the present invention.The figure illustrates
The single side regions of tire radial direction.Additionally, an example of the figure as pneumatic tire, shows pickup truck with without nail anti-pulley
Tire.In addition, in the figure, symbol CL is equatorial plane.Additionally, tire width direction refers to and tire rotary shaft (omitting diagram)
Parallel direction, tire refers to radially the direction vertical with tire rotary shaft.
This pneumatic tire 1 has ring-shaped structure centered on tire rotary shaft, possess a pair of bead core 11,11, a pair
Bead-core 12,12, casing ply 13, belt 14, tread rubber 15, a pair of sidewalls glue 16,16 and a pair of wheel rim shield glue 17,17
(reference picture 1).
A pair of bead core 11,11 be by multiple steel bead wire beams into annular component, constitute left and right bead part core.One
The tire outer radial periphery of a pair of bead core 11,11 is respectively arranged to bead-core 12,12, for strengthening bead part.
The circular frame of casing ply 13 constitutes the skeleton of tire between left and right bead core 11,11.Additionally, casing ply 13
Both ends are to rollback on the outside of tire width direction and fix, and bead core 11 and bead-core 12 are encased.Additionally, casing ply 13 is with painting
Multiple cords that layer glue covering is made up of steel or organic fiber material (for example, aramid fiber, nylon, polyester fiber, staple fibre etc.)
Layer cord simultaneously carries out rolling and processes, and is the cord angle (curtain more than or equal to 80deg less than or equal to 95deg with absolute value
The machine direction of the plies cords inclination angle circumferential relative to tire).
Belt 14 is to constitute a pair of cross band beam 141,142 and the band lamination of cap layer 143, is configured to be centered around curtain
The periphery of layer of cloth 13.Multiple bands that a pair of cross is made up of with coating adhesive covering with beam 141,142 steel or organic fibrous material
Beam layer cord simultaneously carries out rolling and processes, the belt angle with absolute value more than or equal to 20deg less than or equal to 40deg.
Additionally, a pair of cross has the reciprocal belt angle of symbol with beam 141,142, and (machine direction of belt cord is relative to wheel
The circumferential inclination angle of tire), the machine direction of belt cord is intersected ground lamination (oblique construction).Band cap layer 143 is with painting
Layer glue multiple belt cords for being made up of steel or organic fiber material of covering simultaneously roll processing and constitute, and are more than with absolute value
Belt angle equal to 45deg less than or equal to 70deg.Additionally, with the configuration of the lamination of cap layer 143 in cross belt 141,142
Tire radial outside.
Tread rubber 15 is configured at the tire outer radial periphery of casing ply 13 and belt 14, constitutes the fetus face of tire.One
Offside wall glue 16,16 is respectively arranged at the tire width direction outside of casing ply 13, constitutes left and right sides wall portion.A pair of wheel rims protect glue
17th, 17 the tire width direction outside of left and right bead core 11,11 and bead-core 12,12 is arranged respectively at, constitutes left and right bead part.
In addition, tread rubber 15 preferably have greater than equal to 60 less than or equal to 75 rubber hardness, more preferably with more than etc.
In 65 rubber hardnesses less than or equal to 70.Rubber hardness refers to according to the JIS-A hardness of JIS-K6263, under conditions of 20 DEG C
It is measured.
[tread contour]
Fig. 2 is the plan of the fetus face for showing the pneumatic tire described in Fig. 1.Fig. 3 is to show the tread contour described in Fig. 2
Central land portion enlarged drawing.Fig. 4 is the enlarged drawing in the tire-shoulder land portion for showing the tread contour described in Fig. 2.In these figures
In, Fig. 2 shows the traction decorative pattern of studless tire.Additionally, Fig. 3 shows the phase in the central land portion 31 on equatorial plane CL
The pattern block of adjacent a pair.Additionally, Fig. 4 shows one of tire-shoulder land portion 33.In addition, in these figures, tire is circumferentially
The direction of finger wheel tire rotary shaft rotation.Additionally, symbol T refers to tire ground engaging end.
As shown in Fig. 2 the pneumatic tire 1 fetus face have to tire circumferentially extend at least 4 circumferential major troughs 21,
22, and the multiple land portions 31~33 divided by these circumferential major troughs 21,22.
Circumferential major trough refers to the circumferential slot that groove width is more than 5.0mm.The groove width of circumferential slot will be formed in the groove of tyre surface tread
It is measured after except notch and chamfered section on opening portion.
In addition, in the implementation method, most peripheral is referred to as positioned at the outermost left and right circumferential major trough 22,22 of tire width direction
To major trough.Additionally, the land portion 31,32 that will be located closer to compared with left and right outermost circumferential major trough 22,22 on the inside of tire width direction
Referred to as central land portion.Additionally, the land that will be located closer to compared with left and right outermost circumferential major trough 22,22 on the outside of tire width direction
Portion 33,33 is referred to as tire-shoulder land portion.
For example, in the structure of Fig. 2,4 circumferential major troughs 21,22 are in symmetric configuration centered on equatorial plane CL.
And, by these circumferential major troughs 21,22, mark off 3 row central land portions 31,32,32, and pair of right and left tire-shoulder land portion
33、33。
Additionally, as shown in Fig. 2 the pneumatic tire 1 has multiple first band grooves 41,42 in central land portion 31,32.
First band groove 41,42 is the major trough extended to tire width direction, the insertion center land on tire width direction
Ground portion 31,32, and dividing the left and right circumferential major trough 21,22 in central land portion 31,32 respectively；21st, 22 upper shed.
In addition, band groove refers to the translot that groove width is more than 1.0mm.The groove width of band groove will be formed in the groove of tyre surface tread
It is measured after except notch and chamfered section on opening portion.
For example, in the structure of Fig. 2, multiple band grooves 41,42 are arranged respectively in all central land portions 31,32, and
And configuration when in tire circumference air switch appointed interval.Therefore, each central land portion 31,32 in tire circumference by multiple bands
41,42 points of groove is opened, and forms pattern block row.
Additionally, as shown in figure 3, the first band groove 41 (42) is with meander-shaped, in the inside in central land portion 31 (32)
With zigzag part.Meander-shaped includes such as V shape, W shape and zigzag fashion etc..Now, the first band groove 41 (42) is
During structure with meander-shaped, the marginal element in central land portion 31 (32) can increase, from the sight of the traction property for improving tire
Put to consider, then preferably.
Additionally, the first band groove 41 (42) is circumferentially main relative to the left and right for dividing central land portion 31 (32) with perspective structure
Groove 21,22 (21,22) is open.Perspective structure is referred to by the first band groove 41 (42) a from circumferential major trough 21
(21) structure of another circumferential major trough 21 (22) is seen.Therefore, to ensure above-mentioned perspective structure, the first band groove 41 (42)
Curved shape can be restricted.According to the perspective structure, the drainage and row's snow property of the first band groove 41 (42) can be improved, because
This is preferred.
Additionally, width W1 of the zigzag part configuration of the meander-shaped of the first band groove 41 (42) in central land portion 31 (32)
More than or equal to 40% less than or equal to 60% region in.That is, the zigzag part of the first band groove 41 (42) is configured in
In the region of the central portion 20% of the width in centre land portion 31 (32).Additionally, the width W1 in central land portion 31 (32) makees
Determine and draw for the Breadth Maximum in whole land portion.
For example, in the structure of Fig. 3, the first band groove 41 (42) has with two stair-stepping Curveds of zigzag part
Shape, is inclined with the tiltangleθ 1 for specifying, and is extended to tire width direction.Additionally, the zigzag part of the first band groove 41 (42)
Configuration is on the center line in central land portion 31 (32).Also, it is the tiltangleθ 1 of the first band groove 41 (42), groove width W2, adjacent
Zigzag part being adjusted apart from S1 etc. in tire circumference, it is ensured that the perspective structure of the first band groove 41 (42).
Now, the tiltangleθ 1 of the first band groove 41 (42) is preferably in the range of 1≤30deg of 1deg≤θ.In addition, horizontal
The inclination angle of groove is used as the straight line and angle formed by tire width direction of the central point of the left and right opening portion by band groove
Measure draws.
Furthermore it is preferred that groove width W2 apart from S1 and first band groove 41 (42) of the adjacent zigzag part in tire circumference has
There are the relation of 0.50≤S1/W2≤0.90, the more preferably relation with 0.65≤S1/W2≤0.75.Thereby it can be assured that first
The marginal element of band groove 41 (42), it may also be ensured that row's snow property of the first band groove 41 (42).
Additionally, as shown in Figure 2 and Figure 4, the pneumatic tire 1 has a week respectively in left and right tire-shoulder land portion 33,33
To stria 23, multiple second band grooves 43 and multiple 3rd band grooves 44.
Circumferential stria 23 is the stria circumferentially extended to tire, not to outermost circumferential major trough 22 and tyre surface end opening, in tire
The inside in shoulder land portion 33 circumferentially extends to tire, and tire-shoulder land portion 33 is divided into two on tire width direction.
Circumferential stria refers to the circumferential slot that groove width is the groove width more than or equal to 1.0mm and less than circumferential major trough.The groove of stria
It is wide as to trough wall surface distance and determine and draw.Accordingly, with respect to amplitudes such as wave shape, zigzag fashions
Groove, no matter its amplitude, all determines its groove width, determines whether circumferential stria.
For example, in the structure of Fig. 2, left and right tire-shoulder land portion 33,33 has 1 circumferential stria 23 respectively.Additionally, as schemed
Shown in 4, circumferential stria 23 has the zigzag fashion containing linear component.Therefore, the circumferential quilt of stria 23 during tire contacts to earth
During blocking, by make circumferential stria 23 with to cell wall engage, so that it is guaranteed that the rigidity in tire-shoulder land portion 33.But, not
This is confined to, circumferential stria 23 there can also be wave shape (omitting diagram).
Additionally, in the structure of Fig. 2, the maximum α max of the bend angles alpha of the zigzag fashion of circumferential stria 23 are preferably
In the range of 1deg≤α max≤30deg, in the range of more preferably 5deg≤α max≤25deg.
Bend angles alpha is determined and drawn on the basis of the groove center line of circumferential stria 23.Additionally, circumferential stria 23 is with wavy
In the structure of shape, it determines and draws as the angle of the dummy line composition for connecting adjacent flex point.
Additionally, in the structure of Fig. 2, the preferably circumferentially most vat of the maximum groove depth Hs of stria 23 and outermost circumferential major trough 22
Deep H has the relation of 0.40≤Hs/H≤0.80, the more preferably relation with 0.50≤Hs/H≤0.80.Groove depth is by channel opening
Determined after except the otch in portion and the bottom top of bottom land and drawn.
Furthermore it is preferred that being contacted to earth with from equatorial plane CL to tire apart from Ls from equatorial plane CL to circumferential stria 23
The relation apart from L with 0.70≤Ls/L≤0.90 of end T.
Tire ground engaging end T refers to that tire is installed on into regulation wheel rim, assigns regulation internal pressure, and be disposed vertically with inactive state
In on flat board, when applying the load equivalent to prescribed load, the Breadth Maximum position of tire axial in the contact surface of tire and flat board
Put.
Here, it is stipulated that wheel rim refers to, " applicable wheel rim " specified in JATMA, " Design Rim " specified in TRA or
" Measuring Rim " specified in person ETRTO.In addition, it is stipulated that during internal pressure refers to " highest air pressure ", TRA specified in JATMA
" the TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES " maximum or ETRTO of regulation
Specified in " INFLATION PRESSURES ".Also, prescribed load refer to " maximum load capability " specified in JATMA,
" TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES " maximum specified in TRA or
" LOAD CAPACITY " specified in ETRTO.But, in JATMA, the regulation internal pressure of passenger vehicle tyre is 180kPa air pressure,
Prescribed load is the 88% of maximum load capability.
Second band groove 43 is that inner side extends from circumferential stria 23 to tire width direction, and in outermost circumferential major trough 22
The major trough (reference picture 2 and Fig. 4) of opening.That is, the second band groove 43 is configured in the tire being divided into two by circumferential stria 23
Region on the inside of the tire width direction in shoulder land portion 33, it extends to tire width direction inner side, and in outermost circumferential major trough
22 and the circumferential upper shed of stria 23.Additionally, multiple second band grooves 43 are configured in tire circumference with appointed interval.Therefore, tire
Region on the inside of the tire width direction in shoulder land portion 33 is separated in tire circumference, forms pattern block row.
3rd band groove 44 is that outside extends from circumferential stria 23 to tire width direction, and in the major trough of tyre surface end opening
(reference picture 2 and Fig. 4).That is, the 3rd band groove 44 is configured in the tire-shoulder land portion 33 being divided into two by circumferential stria 23
Tire width direction on the outside of region, it extends to tire width direction inner side, and in outermost circumferential major trough 22 and tyre surface end
Opening.Additionally, multiple 3rd band grooves 44 are configured in tire circumference with appointed interval.Therefore, the tire in tire-shoulder land portion 33
Region on the outside of width is separated in tire circumference, forms pattern block row.
Tyre surface end refers to that tire is installed on into regulation wheel rim, is assigning regulation internal pressure and is being at no load condition
When tire tread contour part both ends.
Herein, as shown in figure 4, the 3rd band groove 44 is matched somebody with somebody in tire circumference relative to the staggered positions of the second band groove 43
Put.Therefore, the 3rd band groove 44 is located off the position of the extended line of the second band groove 43, the opening portion of the 3rd band groove 44 and
The opening portion of the second band groove 43 in tire circumference, relative to the offset configuration of circumferential stria 23.
For example, in the structure of Fig. 4, the extension as described above, circumferential stria 23 is circumferentially serrated to tire, and in tire
Tire-shoulder land portion 33 is divided into two on width.Additionally, the 3rd band groove 44 and the second band groove 43 are with circumferential stria
During 23 for the left and right region in the tire-shoulder land portion 33 on border, circumferentially it is alternately arranged to tire.Therefore, the left and right in tire-shoulder land portion 33
Region alternate segments in tire circumference, tire-shoulder land portion 33, as border, turns into arrangement with circumferential stria 23 in tire circumference
Saw-toothed pattern block row.Additionally, the 3rd band groove 44 is communicated to the tire width direction inner side protrusion to circumferential stria 23
Bending section, the second band groove 43 be communicated to circumferential stria 23 tire width direction outside protrusion bending section.Therefore, tire
The left and right pattern block row in shoulder land portion 33 have the edge part protruded to the side of circumferential stria 23.
Additionally, the second band groove 43 is inclined with the tiltangleθ 2 for specifying to tire width direction.Additionally, adjacent land portion
31、32；32nd, 33 each band groove 41~43 is inclined with the tiltangleθ 1 of distinct symbols, θ 2, and is matched somebody with somebody in tire circumference staggered positions
Put.
Now, the preferably tiltangleθ 2 of the second band groove 43 is in the range of 2≤30deg of 1deg≤θ.Furthermore it is preferred that the
The tiltangleθ 2 of two band grooves 43 relative to the first band groove 41 (42) described in Fig. 3 tiltangleθ 1, with 2≤θ's of θ 1
Relation.Therefore, in the structure of Fig. 2, the tiltangleθ 1 of the first band groove 41,42 in centrally located land portion 31,32 is set to
It is larger, the tiltangleθ 2 for being located at the second band groove 43 in tire-shoulder land portion 33 is set to smaller.Therefore, it is possible to maintain the resistance to of tire
Partial wear, and improve performance and snow performance on ice.
In addition, in the composition of Fig. 2, as described above, central land portion 31,32 and tire-shoulder land portion 33 are by circumferential major trough
21st, the pattern block row that 22, first the 41,42, second band groove 43 of band groove and the 3rd band groove 44 are divided.And, tire
When face is looked squarely, these pattern blocks row are configured to centered on the point on equatorial plane CL point-symmetrically.Changed to improve tire
Convenience during position, preferably with the point symmetry decorative pattern.
Additionally, in the structure of Fig. 2, on the crossover location of circumferential major trough 21 (22) and the first band groove 41 (42), respectively
The edge part in land portion 31 (32,33) has the order difference part (reference picture 2) offset to tire width direction.Specifically, each land
The edge part of the side of circumferential major trough 21 (22) of the pattern block in ground portion 31 (32,33) has in the enterprising row order of tire width direction respectively
The order difference part of scalariform change.Additionally, the edge part of adjacent pattern block in tire circumference is in position of staggering on tire width direction
Put, configure in the opening portion of the first band groove 41 (42).Therefore, circumferential major trough 21 (22) bends to rank on tire width direction
Scalariform, and extended with roughly the same groove width in tire circumference.Therefore, it is distracted into branch's increase, it is possible to increase tire
Performance and snow performance on ice.
Additionally, in the pneumatic tire 1, as shown in Figure 2 to 4, the pattern block in each land portion 31~33 has multiple respectively
Groove 5.Therefore, it is possible to strengthen the marginal element of pattern block, improve as the hauling ability of studless tire.
Groove refers to the grooving with the groove width less than 1.0mm.In addition, groove can be vertical with trench length direction
Profile in have rectilinear form groove wall planar trenches, or in the section vertical with trench length direction
There is the three-dimensional groove of the groove wall for being shaped as bending to groove width direction in figure.Three-dimensional groove compared with two-dimensional groove,
Snap-in force is stronger between opposite groove wall, therefore with the enhancing rigid effect in land portion.It is therefore preferable that at least one row flower
Line block row have three-dimensional groove, and more preferably all pattern blocks all have three-dimensional groove.As the three-dimensional groove, can for example enumerate with
Lower decorative pattern.
Fig. 5 and Fig. 6 are an explanatory diagrams for example for showing three-dimensional groove.The figures illustrate the trench wall of three-dimensional groove
Face.
In the three-dimensional groove of Fig. 5, trench wall face has connect up pyrometric cone in trench length side and inverted triangle cone is formed
Construction.In other words, trench wall face has the zigzag fashion of the zigzag fashion of tyre surface side and bottom side in tyre width side
The zigzag fashion of the spacing, the tyre surface side and bottom surface side of being mutually staggered upwards is mutual opposite concavo-convex.Additionally, groove wall
By on these are concavo-convex, on concavo-convex when being seen towards tire direction of rotation, the convex bending of tyre surface side is connected with crest line respectively
The convex bending point of the recessed bending point, the recessed bending point of tyre surface side and bottom side of point and bottom side and tyre surface side
The two convex bending points adjoined each other in the convex bending point of convex bending point and bottom side, and along tire width direction plane
These crest lines are formed by connecting successively.Also, the trench wall face of side has convex pyrometric cone and inverted triangle cone is wide in tire
Male and fomale(M＆F) in arrayed interaction on degree direction, the trench wall face of opposite side has bores in tire concavity pyrometric cone and inverted triangle
Male and fomale(M＆F) in arrayed interaction on width.And, groove wall at least allows configuration outermost concavo-convex at groove two ends
Facing to the outside of pattern block.In addition, on this three-dimensional groove, it is known to such as No. 3894743 public affairs of Japanese Patent
Technology disclosed in report.
Additionally, in the three-dimensional groove of Fig. 6, trench wall face has to be made with the block-shaped multiple prisms of decorative pattern relative to ditch
Groove depth direction inclines, and prism links construction on gash depth direction and trench length direction.In other words,
Groove wall has zigzag fashion in tyre surface.Additionally, groove wall is inside pattern block, tire radially two at more than have
Have along tire circumferential skewing and in tire width direction be connected bending section, and the bending section have tire radially have
The zigzag fashion of amplitude.Also, on the one hand groove wall fixes the amplitude in tire circumference, another aspect trench bottom side
It is smaller towards the angle of tire peripheral, oblique relative to tyre surface normal direction compared with tyre surface side, and the tire footpath of bending section
To amplitude it is then larger.In addition, on this three-dimensional groove, it is known in such as No. 4316452 publication of Japanese Patent
Disclosed technology.
[effect]
As described above, the pneumatic tire 1 possesses at least four circumferential major troughs 21,22, Yi Jiyou circumferentially extended to tire
Multiple land portions 31~33 (reference picture 2) that these circumferential major troughs 21,22 are divided.Additionally, being also equipped with：First band groove 41
(42), its insertion central land portion 31 (32) on tire width direction；Circumferential stria 23, its configuration is in tire-shoulder land portion 33
On, and circumferentially extended to tire；Second band groove 43, from circumferential stria 23 to tire width direction, inner side extends for it, and
In the upper shed of outermost circumferential major trough 22；And the 3rd band groove 44, from circumferential stria 23 to tire width direction, outside extends for it,
In tyre surface end opening, and configured relative to the staggered positions of the second band groove 43 in tire circumference.Additionally, the first band groove 41
(42) with meander-shaped, and with perspective structure relative to the left and right circumferential major trough 21,22 for dividing central land portion 31 (32)
(21,22) are open.
In the structure, the 3rd band groove 44 in (1) tire-shoulder land portion 33 is in tire circumference relative to the second band groove 43
Staggered positions are configured, therefore, it is possible to suitably ensure the rigidity in tire-shoulder land portion 33.Thus, pneumatic tire of the invention have can
Improve the advantage of resistance to partial wear performance.
Additionally, (2) circumference stria 23 configures the tire-shoulder land portion 33 when turn inside diameter is travelled by larger pressure of contacting to earth
On, therefore with the traction composition increased to tire width direction, improve the advantage of the turn performance of tire.Additionally, with configuration
Groove is compared come the structure (omitting diagram) for replacing circumferential stria 23, and shearing force can be with the sump volume in tire-shoulder land portion 33 in snow
Increase and increase, therefore there is the performance on ice and snow performance that can improve tire.
Additionally, (3) first band grooves 41 (42) are with meander-shaped, therefore increased tire circumference and tire width direction
On marginal element, there is the performance on ice and snow performance that can improve tire.Additionally, also having, decorative pattern can be suppressed
Collapsing for block, improves the advantage of the resistance to partial wear performance of tire.
Additionally, (4) first band grooves 41 (42) are with perspective structure, therefore with the performance on ice and snow of tire can be improved
The advantage of upper performance.
Additionally, in the pneumatic tire 1, the zigzag part of the first band groove 41 (42) configures the width in central land portion 31 (32)
In the region more than or equal to 40% less than or equal to 60% of degree W1 (reference picture 3).In the structure, the song of the first band groove 41 (42)
Folding part configures the central portion in central land portion 31 (32), therefore with that can suppress collapsing for pattern block, improves the resistance to inclined of tire
The advantage of polishing machine.
Additionally, in the pneumatic tire 1, the first band groove 41 (42) is with multiple zigzag parts (reference picture 3).Additionally, adjacent
Groove width W2 apart from S1 and first band groove 41 (42) of the zigzag part in tire circumference there is 0.50≤S1/W2≤0.90
Relation.In this way, have the advantages that the adjacent zigzag part of optimization apart from S1.That is, can be by setting
0.50≤S1/W2, suitably to ensure the marginal element of band groove 41 (42).Furthermore, it is possible to pass through to set S1/W2≤0.90,
Suitably to ensure row's property avenged of bending section.
Additionally, in the pneumatic tire 1, circumferential stria 23 has multiple bending sections (reference picture 4).In this way, increase
The marginal element in tire-shoulder land portion 33 is added, there is the performance on ice and snow performance that can improve tire.
Additionally, in the pneumatic tire 1, the scope of the bend angles alpha of the bending section of circumferential stria 23 in 1deg≤α≤30deg
Interior (reference picture 4).Therefore, there is the bend angles alpha of the circumferential stria 23 of optimization.That is, due to 1deg≤α max, institute
So that the effect for increasing marginal element can be obtained by bending section, further, since α max≤30deg, it is possible to ensure circumferential thin
Row's snow property of groove 23.
Additionally, in the pneumatic tire 1, the maximum groove depth Hs of the circumferential stria 23 and maximum groove depth H of outermost circumferential major trough 22
Relation with 0.40≤Hs/H≤0.80.In this way, there is the maximum groove depth Hs of the circumferential stria 23 of optimization.
That is, can be by setting 0.40≤Hs/H, come shearing force in ensuring to avenge by circumferential stria 23, can be by setting
Hs/H≤0.80, suitably to ensure effect of the circumferential stria 23 in tire wear latter stage.
Additionally, in the pneumatic tire 1, from equatorial plane CL to circumferential stria 23 apart from Ls with from equatorial plane CL
To the relation (reference picture 2) apart from L with 0.70≤Ls/L≤0.90 of tire ground engaging end T.In this way, with optimization
The advantage of the position of the tire width direction of circumferential stria 23.For example, the configuration by setting circumferential stria 23 as described above,
Vehicle zero load in tire contact to earth scope it is smaller when, it is also possible to circumferential stria 23 is configured in tread surface.In this way, have
No matter there are the cargo-loading conditions of vehicle, the advantage of the function of circumferential stria 23 can be suitably ensured.
Additionally, in the pneumatic tire 1, tiltangleθ 1 and second of the first band groove 41 (42) relative to tire width direction
Band groove 43 meets 1≤30deg of 1deg≤θ, 2≤30deg of 1deg≤θ and θ 2 relative to the tiltangleθ 2 of tire width direction
The necessary condition (reference picture 3 and Fig. 4) of≤θ 1.Therefore, with the first band groove 41 for optimizing centrally located land portion 31 (32)
(42) advantage of tiltangleθ 1 and the relation of the tiltangleθ 2 of the second band groove 43 for being located at tire-shoulder land portion 33.Namely
Say, can by 1deg≤θ 1 is set and 1deg≤θ 2 come make band groove 41~43 incline, so as to improve to tyre width side
To drainage and frost road surface row snow property.Furthermore, it is possible to pass through to set 1≤30deg of θ and 2≤30deg of θ ensure horizontal stroke
Groove 41~43 is to the circumferential marginal element of tire, it is ensured that traction property during braking, additionally it is possible to ensure in the use for loitering
Under the conditions of resistance to partial wear performance.Furthermore, it is possible to pass through to set 2≤θ of θ 1 to maintain resistance to partial wear performance and improve ice and snow
Energy.
Additionally, in the pneumatic tire 1, on the crossover location of circumferential major trough 21 (22) and the first band groove 41 (42), respectively
The edge part in land portion 31 (32,33) has the order difference part (reference picture 2) offset to tire width direction.Therefore, increased and lead
Draw composition, there is the performance on ice and snow performance that can improve tire.
Additionally, in the pneumatic tire 1, on the crossover location of circumferential major trough 21 (22) and the first band groove 41 (42), in
The edge part of the circumferentially upper adjacent pattern block of tire staggered positions on tire width direction, configure in the first band groove 41 (42)
Opening portion (reference picture 2).In this way, traction composition is increased, with the performance on ice and snow that can improve tire
The advantage of performance.
Additionally, in the pneumatic tire 1, land portion 31~33 has multiple three-dimensionals groove 5 (reference picture 2 and Fig. 3).By this
The mode of kind, with the rigid advantage that can improve land portion 31~33.For example, can have by making central land portion 31,32
Three-dimensional groove 5 improves the driving stability performance of tire, and can have three-dimensional groove 5 by making tire-shoulder land portion 33, comes
Improve the resistance to partial wear performance of tire.
Additionally, in the pneumatic tire 1, tread rubber 15 has the rubber hardness less than or equal to 75 more than or equal to 60.By this
The mode of kind, with the rigid advantage that can suitably ensure fetus face.[applicable object]
Additionally, the highest air pressure that the pneumatic tire 1 is preferably specified with JATMA is to be less than or equal to more than or equal to 350kPa
Small card tire for vehicles in the range of 600kPa is used as applicable object.Small card tire for vehicles is mainly used in local traveling, because
This middle section easily occurs to wear away in advance because implementing to loiter repeatedly.In this regard, in the pneumatic tire 1, by week
Configured in tire-shoulder land portion 33 to stria 23, thus with by circumferential slot arrangement central land portion structure (omit diagram) phase
Than, it can be ensured that the rigidity of fetus face middle section.In this way, walk to stop performance repeatedly with can improve tire, and
And the advantage that middle section generation wears away in advance can be suppressed.Embodiment
Fig. 7 is the chart of the performance test results of the pneumatic tire for showing embodiment of the invention.Fig. 8 is to show routine
The explanatory diagram of the pneumatic tire of example.Fig. 9 is the explanatory diagram of the pneumatic tire for showing comparative example.
In the performance test, to multiple mutually different pneumatic tires, carried out relevant (1) resistance to partial wear performance and
(2) evaluation (reference picture 7) of ice and snow performance (performance and snow performance on ice).In the performance test, by tire size 205/
The pneumatic tire (pickup truck studless tire) of 85R16117/115L is assembled on the applicable wheel rim of JATMA regulations, and
Apply highest air pressure and the maximum load that JATMA specifies to the pneumatic tire.Additionally, pneumatic tire is arranged on into test vehicle
On i.e. 3 tons all wheels of truck.
(1) about in the evaluation of resistance to partial wear performance, test vehicle travels mating formation in 50,000 km with average speed 60km/h
Lu Shang, observes the partial wear produced on the pattern block in each land portion.Then, based on the observation result, on the basis of conventional example
(100) index assessment, is carried out.The numerical value is more big more preferred.
(2) about in the evaluation of ice and snow performance, test vehicle is travelled on the test road with ice road surface and snow road surface,
Test driver is to braking, startability, rectilinear propagation and curving carries out comprehensive sensory evaluation.The evaluation is by with normal
The index assessment of (100) is carried out on the basis of regulations, and its numerical value is more big more preferred.
The pneumatic tire 1 of embodiment 1 has the structure described in Fig. 1~Fig. 4.The pneumatic tire 1 of embodiment 2~13 is real
Apply the improvement example of the pneumatic tire 1 of example 1.Additionally, from equatorial plane CL to ground engaging end T apart from L be L=80mm.Additionally, most
The maximum groove depth H of outer circumferential major trough 22 is H=13.5mm.
The pneumatic tire of conventional example has the structure shown in Fig. 8.The pneumatic tire of comparative example has the structure shown in Fig. 9.
As shown in result of the test, it can be seen that resistance to partial wear performance, the ice of tire in the pneumatic tire 1 of embodiment 1~13
Upper performance and snow performance are improved.
Symbol description
1：Pneumatic tire
5：Three-dimensional groove
11：Bead core
12：Bead-core
13：Casing ply
14：Belt
15：Tread rubber
16：Side wall glue
17：Wheel rim protects glue
21：Circumferential major trough
22：Outermost circumferential major trough
23：Circumferential stria
31、32：Central land portion
33：Tire-shoulder land portion
41、42：First band groove
43：Second band groove
44：3rd band groove
141、142：Cross belt
143：Band cap layer
Claims (12)
1. a kind of pneumatic tire, it has at least 4 circumferential major troughs being circumferentially extended to tire and is drawn by the circumferential major trough
The multiple land portions for dividing, it is characterised in that
Will be located at tire width direction the outermost left and right circumferential major trough be referred to as outermost circumferential major trough, will it is more described most
Outer circumferential major trough is located closer to the referred to as central land portion of the land portion on the inside of tire width direction, at the same will it is more described most
Outer circumferential major trough be located closer to the land portion on the outside of tire width direction referred to as tire-shoulder land portion when,
It has：First band groove, its central land portion described in insertion on tire width direction；
Circumferential stria, its configuration circumferentially extends in the tire-shoulder land portion to tire；
Second band groove, from the circumferential stria to tire width direction, inner side extends for it, and is opened in the outermost circumferential major trough
Mouthful；And
3rd band groove, from the circumferential stria to tire width direction, outside extends for it, in tyre surface end opening, and is configured to
Relative to the second band groove, the staggered positions in tire circumference,
The first band groove possesses the meander-shaped of multiple zigzag parts, at the same with perspective structure relative to divide it is described in
The circumferential major trough opening in centre land portion or so,
The adjacent zigzag part has 0.65≤S1/ apart from S1 in tire circumference with the groove width W2 of the first band groove
The relation of W2≤0.75,
The groove width of the circumferential major trough is more than 5.0mm,
The groove width of the circumferential stria is groove widths of the 1.0mm less than the circumferential major trough.
2. pneumatic tire according to claim 1, it is characterised in that the zigzag part of the first band groove is configured described
In the region more than or equal to 40% less than or equal to 60% of the width W1 in central land portion.
3. pneumatic tire according to claim 1 and 2, it is characterised in that the circumferential stria has multiple bending sections.
4. pneumatic tire according to claim 3, it is characterised in that the bend angles alpha of the bending section of the circumferential stria
Maximum α max are in the range of 1deg≤α max≤30deg.
5. pneumatic tire according to claim 1 and 2, it is characterised in that the maximum groove depth Hs of the circumferential stria and institute
Stating the maximum groove depth H of circumferential major trough has the relation of 0.40≤Hs/H≤0.80.
6. pneumatic tire according to claim 1 and 2, it is characterised in that from equatorial plane to the circumferential stria
Apart from Ls and the relation apart from L with 0.70≤Ls/L≤0.90 from equatorial plane to tire ground engaging end.
7. pneumatic tire according to claim 1 and 2, it is characterised in that the first band groove is relative to tyre width
The tiltangleθ 1 in direction and the second band groove relative to the tiltangleθ 2 of tire width direction meet 1deg≤θ 1≤
The necessary condition of 30deg, 1deg≤2≤30deg of θ and 2≤θ of θ 1.
8. pneumatic tire according to claim 1 and 2, it is characterised in that in the circumferential major trough and first band
On the crossover location of groove, the edge part in the land portion has the order difference part offset to tire width direction.
9. pneumatic tire according to claim 1 and 2, it is characterised in that in the circumferential major trough and first band
On the crossover location of groove, the edge part of the pattern block in the adjacent land portion is wrong on tire width direction in tire circumference
Open position, configures in the opening portion of the first band groove.
10. pneumatic tire according to claim 1 and 2, it is characterised in that the land portion has multiple three-dimensional grooves.
11. pneumatic tires according to claim 1 and 2, it is characterised in that tread rubber have be less than or equal to more than or equal to 60
75 rubber hardness.
12. pneumatic tires according to claim 1 and 2, the highest air pressure that it is specified with JATMA as 350kPa more than
Small card tire for vehicles in the scope of below 600kPa is used as applicable object.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-245750 | 2012-11-07 | ||
| JP2012245750A JP5942795B2 (en) | 2012-11-07 | 2012-11-07 | Pneumatic tire |
| PCT/JP2013/076431 WO2014073286A1 (en) | 2012-11-07 | 2013-09-27 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104768774A CN104768774A (en) | 2015-07-08 |
| CN104768774B true CN104768774B (en) | 2017-06-30 |
Family
ID=50684403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380057588.8A Expired - Fee Related CN104768774B (en) | 2012-11-07 | 2013-09-27 | Pneumatic tire |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5942795B2 (en) |
| CN (1) | CN104768774B (en) |
| WO (1) | WO2014073286A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6235985B2 (en) * | 2014-11-06 | 2017-11-22 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6554017B2 (en) * | 2015-11-05 | 2019-07-31 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| JP6646407B2 (en) * | 2015-11-05 | 2020-02-14 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| JP6649850B2 (en) * | 2016-06-13 | 2020-02-19 | 株式会社ブリヂストン | Pneumatic tire |
| JP6711171B2 (en) * | 2016-06-27 | 2020-06-17 | 住友ゴム工業株式会社 | tire |
| JP6682386B2 (en) * | 2016-06-30 | 2020-04-15 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| WO2018117009A1 (en) * | 2016-12-19 | 2018-06-28 | Compagnie Generale Des Etablissements Michelin | A tread for improving aerodynamic |
| JP6880878B2 (en) * | 2017-03-21 | 2021-06-02 | 住友ゴム工業株式会社 | Pneumatic tires |
| JP6897341B2 (en) * | 2017-06-06 | 2021-06-30 | 住友ゴム工業株式会社 | tire |
| JP6937615B2 (en) * | 2017-06-07 | 2021-09-22 | 株式会社ブリヂストン | tire |
| JP7115150B2 (en) * | 2018-08-30 | 2022-08-09 | 横浜ゴム株式会社 | pneumatic tire |
| JP7172348B2 (en) * | 2018-09-20 | 2022-11-16 | 住友ゴム工業株式会社 | tire |
| JP7489186B2 (en) * | 2019-11-29 | 2024-05-23 | 株式会社ブリヂストン | tire |
| JP7422583B2 (en) * | 2020-03-26 | 2024-01-26 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | pneumatic tires |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4136558B2 (en) * | 2002-09-11 | 2008-08-20 | 株式会社ブリヂストン | Pneumatic tire |
| EP1961587A1 (en) * | 2007-02-22 | 2008-08-27 | Sumitomo Rubber Industries, Ltd. | Studless tire |
| EP2319712B1 (en) * | 2008-07-16 | 2012-10-10 | Bridgestone Corporation | Pneumatic tire |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01101205A (en) * | 1987-10-12 | 1989-04-19 | Bridgestone Corp | Pneumatic tire |
| JPH08183312A (en) * | 1994-12-28 | 1996-07-16 | Yokohama Rubber Co Ltd:The | Pneumatic tire for iced and snowed road |
| JP3616150B2 (en) * | 1995-01-26 | 2005-02-02 | 株式会社ブリヂストン | Heavy duty studless pneumatic tire |
| JP4056164B2 (en) * | 1999-01-05 | 2008-03-05 | 横浜ゴム株式会社 | Pneumatic radial tire |
| JP4769858B2 (en) * | 2006-02-20 | 2011-09-07 | 株式会社ブリヂストン | Pneumatic tire |
-
2012
- 2012-11-07 JP JP2012245750A patent/JP5942795B2/en active Active
-
2013
- 2013-09-27 WO PCT/JP2013/076431 patent/WO2014073286A1/en active Application Filing
- 2013-09-27 CN CN201380057588.8A patent/CN104768774B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4136558B2 (en) * | 2002-09-11 | 2008-08-20 | 株式会社ブリヂストン | Pneumatic tire |
| EP1961587A1 (en) * | 2007-02-22 | 2008-08-27 | Sumitomo Rubber Industries, Ltd. | Studless tire |
| EP2319712B1 (en) * | 2008-07-16 | 2012-10-10 | Bridgestone Corporation | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014094601A (en) | 2014-05-22 |
| WO2014073286A1 (en) | 2014-05-15 |
| CN104768774A (en) | 2015-07-08 |
| JP5942795B2 (en) | 2016-06-29 |
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Granted publication date: 20170630 |