WO2014109248A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2014109248A1 WO2014109248A1 PCT/JP2013/084909 JP2013084909W WO2014109248A1 WO 2014109248 A1 WO2014109248 A1 WO 2014109248A1 JP 2013084909 W JP2013084909 W JP 2013084909W WO 2014109248 A1 WO2014109248 A1 WO 2014109248A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- groove
- recess
- pneumatic tire
- concave portion
- Prior art date
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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
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
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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
- B60C11/24—Wear-indicating arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C2011/133—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising recesses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C2011/1338—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising protrusions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10027—Tires, resilient with wear indicating feature
Definitions
- the present invention relates to a pneumatic tire, and more particularly, to a pneumatic tire that can recognize the degree of wear well and reliably.
- Patent Document 1 the entire bottom or the slip sign installed on the bottom of the drainage groove and the bottom of the drainage groove of the tire is color-coded with paint or fluorescent paint to make it easy to see and wear. Tires that clearly indicate when to replace the tires are shown.
- channel provided in the tread part is provided in the radial direction inner side from the surface layer part rubber layer provided in the surface layer part, and the surface layer part rubber layer.
- the surface layer rubber layer is continuously provided on the surface layer portion of the groove bottom portion and is made of the same rubber material as the rubber material forming the groove bottom portion, and the different color rubber layer includes the surface layer rubber layer and A tire having a color different from any of the rubber portions adjacent to the radially inner side of the different color rubber layer is shown.
- Patent Document 3 discloses a tire that can identify the degree of tire reduction by making a rubber sign made of three colors of blue, light blue, and red and embedding it in the ground contact surface of the tire.
- Patent Document 4 discloses a tire having a wear degree display portion that is provided on a tread tread surface and directly displays the wear degree by changing the appearance according to the wear degree of the tread.
- the wear degree display section is formed by disposing a plurality of recesses having different depths in a predetermined arrangement direction so as to be separated from each other in order of depth.
- Patent Document 1 and Patent Document 2 described above indicate the time for replacement when the slip sign or tread wear indicator is worn.
- the tires of Patent Document 3 and Patent Document 4 described above show the degree of wear.
- a portion indicating the degree of wear is provided on the tread surface.
- the tread and the member are different rubber columns, and in Patent Literature 4, the tire is a recess. For this reason, uneven wear may occur on the tread surface of the tread, or the steering stability may be lowered, which may impair the tire performance.
- the present invention has been made in view of the above, and an object of the present invention is to provide a pneumatic tire capable of recognizing the degree of wear well and reliably without impairing the tire performance.
- the pneumatic tire according to the first aspect of the present invention is a pneumatic tire having a groove on a tread surface.
- a glittering material is attached to the surface.
- the wear degree of the tread surface can be recognized by reducing or eliminating the glitter material with wear of the tread surface. Moreover, according to this pneumatic tire, since the glittering material is adhered in the recess, even when stones enter the groove, contact with the glittering material is prevented. In addition, the scratch resistance and weather resistance of the glittering material can be improved. For this reason, the glitter of the glitter material can be maintained, and the degree of wear of the tread surface can be recognized well and reliably.
- the pneumatic tire of the second invention is the pneumatic tire according to the first invention, wherein a step is formed along the tire circumferential direction on the groove wall surface of the groove, and the recess is provided on at least the upper surface constituting the step, A glittering material is attached in the recess.
- the glitter material in the recess provided on at least the upper surface of the stepped portion, the visibility when the tread surface is viewed in a plane is improved, and the degree of wear of the tread surface is further increased. Good and reliable recognition is possible.
- the pneumatic tire according to a third aspect is the pneumatic tire according to the second aspect, wherein a plurality of the step portions are provided in the tire radial direction, the recesses are provided on at least the upper surface constituting each step portion, and the glitter is provided in the recesses.
- the material is attached.
- the visibility when the tread surface is viewed in plan is improved, and the degree of wear of the tread surface is increased. Can be recognized better and more reliably, and the wear degree of the tread surface can be recognized step by step.
- the ratio of the major axis H1 of the glittering material to the width H of the bottom surface of the recess is 0.3 ⁇ H1 /. It satisfies the range of H ⁇ 0.95.
- the visibility of the glittering material can be improved by setting H1 / H to 0.3 or more. Further, by setting H1 / H to 0.95 or less, it is possible to improve the fit of the glittering material in the recess and to prevent the glittering material from falling off.
- the pneumatic tire according to a fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the depth D of the recess satisfies a range of 0.2 mm ⁇ D ⁇ 1.5 mm. .
- the depth D of the recess by setting the depth D of the recess to 0.2 mm or more, it is possible to improve the fit of the glitter material in the recess and to prevent the glitter material from falling off. Moreover, the visibility of a brilliant material can be improved by the depth D of a recessed part being 1.5 mm or less.
- the pneumatic tire according to a sixth aspect of the present invention is the pneumatic tire according to any one of the first to fifth aspects, wherein a small protrusion that protrudes in the concave portion is provided on the inner surface on the opening side of the bottom surface of the concave portion. It is characterized by.
- the glittering material attached to the bottom surface of the recess is locked by the small protrusions, so that the glittering material can be prevented from falling off.
- the pneumatic tire according to the present invention can recognize the degree of wear well and reliably.
- FIG. 1 is a meridional sectional view of a pneumatic tire according to an embodiment of the present invention.
- FIG. 2 is a plan view of a tread surface in the pneumatic tire according to the embodiment of the present invention.
- 3 is a cross-sectional perspective view taken along line AA in FIG. 4 is a cross-sectional perspective view taken along the line AA in FIG. 2 showing another example.
- FIG. 5 is an enlarged perspective view of the recess.
- FIG. 6 is an enlarged perspective view of the recess.
- FIG. 7 is an enlarged perspective view of the recess.
- FIG. 8 is a plan view of a tread surface showing another example of the pneumatic tire according to the embodiment of the present invention.
- FIG. 9 is a cross-sectional perspective view taken along line BB in FIG.
- FIG. 10 is a cross-sectional perspective view taken along the line BB in FIG. 8 showing another example.
- FIG. 11 is a cross-sectional view showing a recess.
- FIG. 12 is a cross-sectional view showing a recess.
- FIG. 13 is a chart showing the results of the performance test of the pneumatic tire according to the example of the present invention.
- FIG. 14 is a chart showing the results of the performance test of the pneumatic tire according to the example of the present invention.
- FIG. 15 is a chart showing the results of the performance test of the pneumatic tire according to the example of the present invention.
- FIG. 16 is a chart showing the results of the performance test of the pneumatic tire according to the example of the present invention.
- FIG. 1 is a meridional sectional view of a pneumatic tire according to this embodiment.
- the tire radial direction refers to a direction orthogonal to the rotation axis (not shown) of the pneumatic tire 1
- the tire radial direction inner side refers to the side toward the rotation axis in the tire radial direction, the tire radial direction outer side. Means the side away from the rotation axis in the tire radial direction.
- the tire circumferential direction refers to a direction around the rotation axis as a central axis.
- the tire width direction means a direction parallel to the rotation axis
- the inner side in the tire width direction means the side toward the tire equator plane (tire equator line) CL in the tire width direction
- the outer side in the tire width direction means the tire width direction. Is the side away from the tire equatorial plane CL.
- the tire equatorial plane CL is a plane that is orthogonal to the rotation axis of the pneumatic tire 1 and passes through the center of the tire width of the pneumatic tire 1.
- the tire width is the width in the tire width direction between the portions located outside in the tire width direction, that is, the distance between the portions farthest from the tire equatorial plane CL in the tire width direction.
- the tire equator line is a line along the tire circumferential direction of the pneumatic tire 1 on the tire equator plane CL.
- CL the same sign “CL” as that of the tire equator plane is attached to the tire equator line.
- the pneumatic tire 1 includes a tread portion 2, shoulder portions 3 on both sides thereof, and a sidewall portion 4 and a bead portion 5 that are sequentially continuous from the shoulder portions 3. Yes.
- the pneumatic tire 1 includes a carcass layer 6, a belt layer 7, and a belt reinforcing layer 8.
- the tread portion 2 is made of a rubber material (tread rubber) and is exposed at the outermost side in the tire radial direction of the pneumatic tire 1, and the surface thereof is the contour of the pneumatic tire 1.
- a tread surface 21 is formed on the outer peripheral surface of the tread portion 2, that is, on the tread surface that contacts the road surface during traveling.
- the tread surface 21 is provided with a plurality of (four in this embodiment) main grooves 22 which are straight main grooves extending along the tire circumferential direction and parallel to the tire equator line CL.
- the tread surface 21 extends along the tire circumferential direction by the plurality of main grooves 22, and a plurality of rib-like land portions 23 parallel to the tire equator line CL are formed.
- the tread surface 21 is provided with a lug groove 24 that intersects the main groove 22 in the rib-shaped land portion 23, so that the land portion 23 is divided into a plurality of blocks in the tire circumferential direction. It may be formed (see FIG. 2 or FIG. 8).
- the shoulder portion 3 is a portion of the tread portion 2 on both outer sides in the tire width direction. Further, the sidewall portion 4 is exposed at the outermost side in the tire width direction of the pneumatic tire 1.
- the bead unit 5 includes a bead core 51 and a bead filler 52.
- the bead core 51 is formed by winding a bead wire, which is a steel wire, in a ring shape.
- the bead filler 52 is a rubber material disposed in a space formed by folding the end portion in the tire width direction of the carcass layer 6 at the position of the bead core 51.
- the carcass layer 6 is configured such that each tire width direction end portion is folded back from the tire width direction inner side to the tire width direction outer side by a pair of bead cores 51 and is wound around in a toroidal shape in the tire circumferential direction. It is.
- the carcass layer 6 is formed by coating a plurality of carcass cords (not shown) arranged in parallel at an angle in the tire circumferential direction with an angle with respect to the tire circumferential direction being along the tire meridian direction.
- the carcass cord is made of organic fibers (polyester, rayon, nylon, etc.).
- the carcass layer 6 is provided as at least one layer.
- the belt layer 7 has a multilayer structure in which at least two belts 71 and 72 are laminated, and is disposed on the outer side in the tire radial direction which is the outer periphery of the carcass layer 6 in the tread portion 2 and covers the carcass layer 6 in the tire circumferential direction. It is.
- the belts 71 and 72 are formed by coating a plurality of cords (not shown) arranged in parallel at a predetermined angle (for example, 20 degrees to 30 degrees) with a coat rubber with respect to the tire circumferential direction.
- the cord is made of steel or organic fiber (polyester, rayon, nylon, etc.). Further, the overlapping belts 71 and 72 are arranged so that the cords intersect each other.
- the belt reinforcing layer 8 is disposed on the outer side in the tire radial direction which is the outer periphery of the belt layer 7 and covers the belt layer 7 in the tire circumferential direction.
- the belt reinforcing layer 8 is formed by coating a plurality of cords (not shown) arranged substantially parallel ( ⁇ 5 degrees) in the tire circumferential direction and in the tire width direction with a coat rubber.
- the cord is made of steel or organic fiber (polyester, rayon, nylon, etc.).
- the belt reinforcing layer 8 shown in FIG. 1 is disposed so as to cover the end of the belt layer 7 in the tire width direction.
- the configuration of the belt reinforcing layer 8 is not limited to the above, and is not clearly shown in the figure.
- the belt reinforcing layer 8 is configured to cover the entire belt layer 7 or has two reinforcing layers, for example, on the inner side in the tire radial direction.
- the reinforcing layer is formed so as to be larger in the tire width direction than the belt layer 7 and is disposed so as to cover the entire belt layer 7, and the reinforcing layer on the outer side in the tire radial direction is disposed so as to cover only the end portion in the tire width direction of the belt layer 7.
- a configuration in which two reinforcing layers are provided and each reinforcing layer is disposed so as to cover only the end portion in the tire width direction of the belt layer 7 may be employed.
- the belt reinforcing layer 8 overlaps at least the end portion in the tire width direction of the belt layer 7.
- the belt reinforcing layer 8 is provided by winding a strip-shaped strip material (for example, a width of 10 [mm]) in the tire circumferential direction.
- FIG. 2 is a plan view of a tread surface in the pneumatic tire according to the present embodiment.
- 3 is a cross-sectional perspective view taken along line AA in FIG. 4 is a cross-sectional perspective view taken along the line AA in FIG. 2 showing another example.
- 5 to 7 are enlarged perspective views of the recess shown in FIG.
- the recess 9 is formed in the groove wall surface 22 a of the main groove 22.
- a glittering material 10 is attached in the recess 9.
- the groove wall surface 22 a refers to a wall surface that rises outward in the tire radial direction from the groove bottom 22 b that is the deepest portion of the main groove 22 and reaches the tread surface 21.
- the recess 9 is formed as a groove which is recessed from the groove wall surface 22a of the main groove 22 and is provided along the tire circumferential direction.
- the recess 9 may be formed as a groove provided between a pair of protrusions protruding from the groove wall surface 22a of the main groove 22 and provided along the tire circumferential direction.
- a plurality of recesses 9 are provided in the tire radial direction in FIG. 3 (two in FIG. 3), but at least one recess may be provided.
- the recess 9 is shown in FIG.
- the cross-sectional shape of the groove is a semicircular shape, but the rectangular shape, the triangular shape in which the groove width narrows toward the bottom of the groove, or the groove width toward the bottom of the groove.
- a trapezoidal shape in which the width of the groove narrows or a trapezoidal shape in which the groove width increases toward the bottom of the groove may be used.
- the recess 9 shown in FIG. 4 is formed as a groove provided between a plurality of parallel ridges 9A protruding from the groove wall surface 22a of the main groove 22, as shown in FIGS. Yes.
- the recess 9 is provided with a plurality of recesses 9 formed of grooves recessed from the groove wall surface 22 a of the main groove 22 so as to extend in parallel with each other, and a ridge (ridge) is formed between the recesses 9. ) May be formed.
- the recess 9 has a trapezoidal shape in which the groove width narrows toward the bottom of the groove as shown in FIG. 5, a triangular shape in which the groove width narrows toward the bottom of the groove as shown in FIG.
- the recessed part 9 shown in FIG. 4 is extended and provided so that the protrusion 9A (recessed part 9) may cross
- the recess 9 may be formed by providing a plurality of recesses 9 made of dimples recessed from the groove wall surface 22 a of the main groove 22, and forming a lattice-like protrusion 9 B between the recesses 9. Good.
- the recess 9 shown in FIGS. 2 to 4 is provided in a part of the block-shaped land portion 23a in the tire circumferential direction, but is provided over the entire length of the block-shaped land portion 23a in the tire circumferential direction. It may be. In addition, although not shown in the drawings, the recess 9 shown in FIGS. 2 to 4 may be provided over a part or the entire length in the tire circumferential direction in the rib-like land portion 23.
- the glitter material 10 is attached to the inner surface of the recess 9 (the bottom surface 9a and the inner surface 9b: see FIG. 11) in the recess 9.
- the glitter material 10 is formed as a thin plate-like or scaly piece having a major axis of 50 ⁇ m or more and 1500 ⁇ m or less.
- the glitter material 10 which is such a small piece is easy to follow the deformation of the tire surface due to rolling of the tire, and thus is difficult to drop off from the recess 9.
- Specific materials for forming the glittering material 10 include polyethylene terephthalate (PET), aluminum, mica, talc and the like. These materials have relatively high glitter.
- the concave portion 9 may be provided on both groove wall surfaces 22a of the main groove 22.
- the glitter material 10 is adhered in the concave portion 9 provided in the groove wall surface 22a of the main groove 22.
- the concave portion 9 is provided in the groove wall surface of the lug groove 24.
- a glittering material 10 may be adhered in the recess 9.
- the pneumatic tire 1 includes a recess in the groove wall surface 22a of the main groove 22 (lug groove 24) in the pneumatic tire 1 having the main groove 22 (lug groove 24) on the tread surface 21. 9 and the glittering material 10 is adhered in the concave portion 9.
- the glitter material 10 is attached to the groove wall surface 22 a of the main groove 22, the glitter material 10 is reduced or eliminated with wear of the tread surface 21, so that The degree of wear can be recognized.
- the glittering material 10 is adhered in the recess 9, so that even when stones or the like enter the main groove 22 (lug groove 24), contact with the glittering material 10 is achieved. Therefore, the glitter material 10 can be prevented from falling off, and the scratch resistance and weather resistance of the glitter material 10 can be improved. For this reason, the glitter of the glitter material 10 can be maintained, and the degree of wear of the tread surface 21 can be recognized well and reliably.
- the glittering material 10 As shown in FIG. 3, if a plurality of recesses 9 are provided in the tire radial direction, the glittering material 10 (recesses 9) gradually decreases with wear of the tread surface 21, and the degree of wear of the tread surface 21. Can be clearly recognized.
- the concave portion 9 if the concave portion 9 is provided in the range in the tire radial direction, the glittering material 10 (the concave portion 9) gradually decreases with wear of the tread surface 21, so that the wear of the tread surface 21 is reduced. The degree can be clearly recognized.
- the glitter material 10 has no glitter. It can be recognized as a replacement time.
- FIG. 8 is a plan view of a tread surface showing another example of the pneumatic tire according to the present embodiment.
- FIG. 9 is a cross-sectional perspective view taken along line BB in FIG.
- FIG. 10 is a cross-sectional perspective view taken along the line BB in FIG. 8 showing another example.
- a step portion 11 is formed on the groove wall surface 22 a of the main groove 22, and a recess portion 9 is formed in the step portion 11.
- a glittering material 10 is attached in the recess 9.
- the step portion 11 has an upper surface 11a facing the outer side in the tire radial direction in the groove wall surface 22a of the main groove 22, and a side surface connected to the upper surface 11a corresponds to the groove wall surface 22a of the main groove 22, and the upper surface 11a and the side surface (Groove wall surface 22a) is formed along the tire circumferential direction.
- the side surfaces between the step portions 11 are connected to the upper surfaces 11a.
- a plurality of step portions 11 are provided in the tire radial direction in FIG. 9 (two in FIG. 9), but at least one step portion 11 may be provided.
- the recessed part 9 provided in the step part 11 shown in FIG. 9 is formed as a groove
- the recess 9 may be formed as a groove provided between a pair of protrusions that protrude from the upper surface 11a of the step portion 11 and that are provided along the tire circumferential direction.
- the recess 9 is shown in FIG. 9 as having a rectangular cross section, but the semicircular shape, a triangular shape in which the groove width narrows toward the bottom of the groove, or a groove width toward the bottom of the groove.
- a trapezoidal shape in which the width of the groove narrows or a trapezoidal shape in which the groove width increases toward the bottom of the groove may be used.
- the recess 9 provided in the step portion 11 shown in FIG. 10 is provided between a plurality of parallel ridges 9A protruding from the upper surface 11a of the step portion 11. It is formed as a groove.
- the recess 9 is provided with a plurality of recesses 9 formed of grooves recessed from the upper surface 11a of the step portion 11 so as to extend in parallel with each other, and a ridge between the recesses 9 is provided. You may form so that.
- the recess 9 has a trapezoidal shape in which the groove width narrows toward the bottom of the groove as shown in FIG. 5, a triangular shape in which the groove width narrows toward the bottom of the groove as shown in FIG.
- the recessed part 9 provided in the step part 11 shown in FIG. 10 is extended and provided so that the protrusion 9A (recessed part 9) may cross
- the recess 9 provided in the step 11 shown in FIG. 10 may be formed as a dimple provided in a lattice-like protrusion 9B protruding from the groove wall surface 22a of the main groove 22, as shown in FIG. Good.
- the recess 9 may be formed by providing a plurality of recesses 9 made of dimples recessed from the groove wall surface 22 a of the main groove 22, and forming a lattice-like protrusion 9 B between the recesses 9. Good.
- the block-shaped land portion 23a has a total length in the tire circumferential direction. It may be provided over. Further, the step portion 11 and the concave portion 9 shown in FIGS. 8 to 10 are not shown in the drawings, but may be provided over a part or the entire length in the tire circumferential direction in the rib-like land portion 23.
- the glitter material 10 is attached to the inner surface of the recess 9 (the bottom surface 9a and the inner surface 9b: see FIG. 11) in the recess 9.
- the glitter material 10 is formed as a thin plate-like or scaly piece having a major axis of 50 ⁇ m or more and 1500 ⁇ m or less.
- the glitter material 10 which is such a small piece is easy to follow the deformation of the tire surface due to rolling of the tire, and thus is difficult to drop off from the recess 9.
- Specific materials for forming the glittering material 10 include polyethylene terephthalate (PET), aluminum, mica, talc and the like. These materials have relatively high glitter.
- FIG. 8 to 10 show a configuration in which the step portion 11 and the concave portion 9 are provided on one groove wall surface 22a of the main groove 22, the step portion 11 and the concave portion are provided on both groove wall surfaces 22a of the main groove 22.
- FIG. 9 may be provided.
- the glittering material 10 is adhered in the concave portion 9 of the step portion 11 provided on the groove wall surface 22 a of the main groove 22.
- the step portion is formed on the groove wall surface of the lug groove 24. 11 and the recess 9 may be provided, and the glittering material 10 may be adhered to the recess 9.
- a concave portion 9 may be provided in the same manner as in the first embodiment, and the glittering material 10 may be adhered to the concave portion 9.
- the pneumatic tire 1 includes a recess in the groove wall surface 22a of the main groove 22 (lug groove 24) in the pneumatic tire 1 having the main groove 22 (lug groove 24) on the tread surface 21. 9 and the glittering material 10 is adhered in the concave portion 9.
- the glitter material 10 is attached to the groove wall surface 22 a of the main groove 22, the glitter material 10 is reduced or eliminated with wear of the tread surface 21, so that The degree of wear can be recognized.
- the glittering material 10 is adhered in the recess 9, so that even when stones or the like enter the main groove 22 (lug groove 24), contact with the glittering material 10 is achieved. Therefore, the glitter material 10 can be prevented from falling off, and the scratch resistance and weather resistance of the glitter material 10 can be improved. For this reason, the glitter of the glitter material 10 can be maintained, and the degree of wear of the tread surface 21 can be recognized well and reliably.
- the pneumatic tire 1 of this embodiment forms the step part 11 along the tire circumferential direction in the groove wall surface 22a of the main groove 22 (lug groove 24), and is recessed on at least the upper surface 11a constituting the step part 11. 9 is provided, and the glittering material 10 is adhered in the recess 9.
- the visibility when the tread surface 21 is viewed in plan is improved by attaching the glitter material 10 in the recess 9 provided in at least the upper surface 11 a of the stepped portion 11, and the tread.
- the degree of wear of the surface 21 can be recognized better and reliably.
- the glitter material is obtained. It is possible to recognize as the replacement time when the 10 glitter is lost.
- a plurality of step portions 11 are provided in the tire radial direction, the recesses 9 are provided on at least the upper surface 11a constituting each step portion 11, and the glittering material 10 is attached in the recesses 9. It is preferable to make it.
- the visibility when the tread surface 21 is viewed in plan is improved by attaching the glitter material 10 in the recess 9 provided on at least the upper surface 11 a of the plurality of step portions 11.
- the degree of wear of the tread surface 21 can be recognized better and more reliably, and the degree of wear of the tread surface 21 can be recognized stepwise.
- the graded wear degree of the tread surface 21 can be recognized more favorably and reliably by changing the color of the glittering material 10 for every step part 11.
- FIG. Of the plurality of step portions 11 (upper surface 11a) having the concave portions 9 to which the glittering material 10 is attached, the innermost step portion 11 in the tire radial direction is at the same height position as the wear indicator indicating the tire replacement time. It is possible to recognize as the replacement time because the glittering property of the glittering material 10 is lost.
- FIG. 11 and 12 are cross-sectional views showing the recesses.
- the recess 9 has a ratio of the major axis H1 of the glitter material 10 to the width H of the bottom surface of the recess 9 as shown in FIG. 11 is 0.3 ⁇ H1 / H ⁇ 0. It is preferable to satisfy the range of .95.
- the width H of the bottom surface of the concave portion 9 is such that the deepest portion of the concave portion 9 is the bottom surface 9a, and the bottom surface 9a is parallel to the surface provided in the concave portion 9 (the groove wall surface 22a or the upper surface 11a of the step portion 11).
- a reference line is drawn from the distance between the reference line and the reference line toward the bottom surface 9 a along the inner side surface 9 b of the recess 9.
- the visibility of the glittering material 10 can be improved by setting H1 / H to 0.3 or more. Further, by setting H1 / H to 0.95 or less, it is possible to improve the fit of the glitter material 10 in the recess 9 and to prevent the glitter material 10 from falling off.
- the depth D of the recess 9 satisfies the range of 0.2 mm ⁇ D ⁇ 1.5 mm.
- the depth D of the recess 9 is set to 0.2 mm or more, so that the glitter material 10 can be better accommodated in the recess 9 and the fall off of the glitter material 10 is suppressed. be able to. Moreover, the visibility of the glittering material 10 can be improved because the depth D of the recessed part 9 shall be 1.5 mm or less.
- the small protrusion 9c which protrudes in the said recessed part 9 in the inner surface 9b of the opening side rather than the bottom face 9a of the recessed part 9, as shown in FIG. .
- the small protrusions 9c may be provided on both of the opposed inner side surfaces 9b as shown in FIG. 12, but may be provided only on one inner side surface 9b.
- the cross-sectional shape of the small protrusion 9 c is not particularly limited, and even if it extends continuously along the extending direction of the recess 9, it extends intermittently. Also good.
- the glitter material 10 attached to the bottom surface 9 a of the recess 9 is locked by the small protrusions 9 c, thereby preventing the glitter material 10 from falling off.
- the protrusion height of the small protrusion 9 c from the inner side surface 9 b of the recess 9 is preferably 1.5 mm or less in consideration of the visibility of the glitter material 10.
- the glittering material 10 may be pressure-bonded to the inner surface (the bottom surface 9a and the inner surface 9b) of the concave portion 9 with a rigid body.
- a rigid body having a shape that matches the inner surface shape of the recess 9 so as to be in close contact with the inner surface of the recess 9.
- the concave portion 9 made of a groove
- the crimping operation can be easily performed.
- the surface of the recess 9 is buffed (the groove wall surface 22 a or the upper surface 11 a of the step portion 11).
- the glittering material 10 adhering to the part (groove wall surface 22a and the upper surface 11a of the step part 11) removed from the recessed part 9 should be removed by performing the treatment. That is, since the glittering material 10 attached to the part removed from the recess 9 is easily detached, the glittering material 10 can be held in a stable state for a long period of time by removing it in advance. In addition, when the glittering material 10 attached to the part that is removed from the recess 9 is removed, the appearance is also improved.
- the glittering material 10 can be mixed in an adhesive liquid or gel adhesive, and the adhesive containing the glittering material 10 can be applied to the recess 9.
- the adhesive containing the glittering material 10 can be applied to the recess 9.
- a pneumatic tire having a tire size of 195 / 65R15 is assembled to a regular rim (15 ⁇ 6J), filled with a regular internal pressure (230 [kPa]), and applied to a test vehicle (domestic 1.4-liter FF vehicle). Installed.
- the regular rim is a “standard rim” defined by JATMA, a “Design Rim” defined by TRA, or a “Measuring Rim” defined by ETRTO.
- the normal internal pressure is “maximum air pressure” defined by JATMA, the maximum value described in “TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES” defined by TRA, or “INFLATION PRESSURES” defined by ETRTO.
- the evaluation method of the visual performance performance is to measure the time required for confirming the wear state by visually checking the wear state of the tread surface by 10 panelists each after traveling 1000 km on the dry road surface by the test vehicle. The average time of this measurement result is evaluated. In this evaluation, the shorter the time, the better the visibility.
- the evaluation method of the color fading resistance performance was obtained by averaging the evaluations of 10 panelists visually confirming the wear condition of the tread surface after traveling 1000 km on the dry road surface using the above test vehicle. Index evaluation is performed with reference to (100). In this evaluation, the larger the index is, the higher the visibility is and the higher the color fading resistance is.
- the pneumatic tire of Conventional Example 1 is one in which a wear indicator is colored (see Patent Document 1).
- the pneumatic tire of Conventional Example 2 is a tire in which a plurality of recesses having different depths are arranged separately in order of depth in a predetermined arrangement direction (see Patent Document 4).
- the pneumatic tires of Examples 1 to 10 are obtained by attaching a glittering material in a recess (groove) provided on the groove wall surface of the main groove (see FIG. 3).
- the pneumatic tires of Examples 1 to 8 have a single recess, and the pneumatic tires of Examples 9 and 10 have a plurality (two) of recesses in the tire radial direction.
- the ratio between the width H of the bottom surface of the recess and the major axis H1 of the glittering material is within a specified range.
- the depth D of the recesses is within a specified range.
- small protrusions are provided on the inner surface of the recess.
- glitter materials having different colors are attached to the respective concave portions.
- the pneumatic tires of Examples 11 to 20 are obtained by attaching a glittering material in a recess (ridge) provided on the groove wall surface of the main groove (see FIG. 4).
- the ratio between the width H of the bottom surface of the recess and the major axis H1 of the glittering material is within a specified range.
- the depth D of the recesses is within a specified range.
- small protrusions are provided on the inner surface of the recess.
- glitter materials having different colors in the tire radial direction are attached.
- the pneumatic tires of Examples 21 to 30 are obtained by attaching a glittering material in a recess (groove) provided on the upper surface of the step portion of the groove wall surface of the main groove (see FIG. 9). .
- the ratio between the width H of the bottom surface of the recess and the major axis H1 of the glittering material is within a specified range.
- the depth D of the recesses is within a specified range.
- the pneumatic tires of Example 28 and Example 30 are provided with small protrusions on the inner surface of the recess.
- the pneumatic tires of Example 29 and Example 30 have a plurality (two) of step portions in the tire radial direction, and glitter materials having different colors are attached to the concave portions of the step portions.
- the pneumatic tires of Examples 31 to 40 are obtained by attaching a glittering material in a recess (ridge) provided on the upper surface of the step portion of the groove wall surface of the main groove (see FIG. 10). .
- the ratio between the width H of the bottom surface of the recess and the major axis H1 of the glittering material is within a specified range.
- the depth D of the recesses is within a specified range.
- small protrusions are provided on the inner surface of the recess.
- the pneumatic tires of Examples 1 to 40 have improved visual performance and color fading resistance, respectively, and the wear degree is recognized well and reliably. I understand.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
図2は、本実施形態に係る空気入りタイヤにおけるトレッド面の平面図である。図3は、図2におけるA-A断面斜視図である。図4は、他の例を示す図2におけるA-A断面斜視図である。図5~図7は、図4に示す凹部の拡大斜視図である。
図8は、本実施形態に係る空気入りタイヤの他の例を示すトレッド面の平面図である。図9は、図8におけるB-B断面斜視図である。図10は、他の例を示す図8におけるB-B断面斜視図である。
図11および図12は、凹部を示す断面図である。上述した実施形態1および実施形態2において、凹部9は、図11に示すように、凹部9の底面の幅Hに対する光輝性材料10の長径H1の比が、0.3≦H1/H≦0.95の範囲を満たすことが好ましい。
実施形態1~実施形態3の空気入りタイヤ1を製造する場合、凹部9を有する空気入りタイヤ1を加硫した後、凹部9内に光輝性材料10を付着させる。これにより、上述した空気入りタイヤ1を得ることができる。
2 トレッド部
21 トレッド面
22 主溝(溝)
22a 溝壁面
24 ラグ溝(溝)
9 凹部
9A 突条
9B 突起
9a 底面
9b 内側面
9c 小突起
10 光輝性材料
11 段部
11a 上面
Claims (6)
- トレッド面に、溝を有した空気入りタイヤにおいて、
前記溝の溝壁面に凹部を設け、当該凹部内に光輝性材料を付着させたことを特徴とする空気入りタイヤ。 - 前記溝の溝壁面にタイヤ周方向に沿って段部を形成し、当該段部を構成する少なくとも上面に前記凹部を設け、当該凹部内に光輝性材料を付着させたことを特徴とする請求項1に記載の空気入りタイヤ。
- 前記段部をタイヤ径方向で複数設け、各前記段部を構成する少なくとも上面に前記凹部を設け、当該凹部内に光輝性材料を付着させたことを特徴とする請求項2に記載の空気入りタイヤ。
- 前記凹部の底面の幅Hに対する前記光輝性材料の長径H1の比が、0.3≦H1/H≦0.95の範囲を満たすことを特徴とする請求項1~3のいずれか1つに記載の空気入りタイヤ。
- 前記凹部の深さDが0.2mm≦D≦1.5mmの範囲を満たすことを特徴とする請求項1~4のいずれか1つに記載の空気入りタイヤ。
- 前記凹部の底面よりも開口側の内側面に、当該凹部内で突出する小突起を設けたことを特徴とする請求項1~5のいずれか1つに記載の空気入りタイヤ。
Priority Applications (3)
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CN201380069338.6A CN104903123B (zh) | 2013-01-10 | 2013-12-26 | 充气轮胎 |
DE112013006391.3T DE112013006391T5 (de) | 2013-01-10 | 2013-12-26 | Luftreifen |
US14/759,921 US20150343852A1 (en) | 2013-01-10 | 2013-12-26 | Pneumatic Tire |
Applications Claiming Priority (2)
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JP2013-002790 | 2013-01-10 | ||
JP2013002790A JP5846131B2 (ja) | 2013-01-10 | 2013-01-10 | 空気入りタイヤ |
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WO2014109248A1 true WO2014109248A1 (ja) | 2014-07-17 |
Family
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PCT/JP2013/084909 WO2014109248A1 (ja) | 2013-01-10 | 2013-12-26 | 空気入りタイヤ |
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US (1) | US20150343852A1 (ja) |
JP (1) | JP5846131B2 (ja) |
CN (1) | CN104903123B (ja) |
DE (1) | DE112013006391T5 (ja) |
WO (1) | WO2014109248A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014210715A1 (de) * | 2014-06-05 | 2015-12-17 | Continental Reifen Deutschland Gmbh | Fahrzeugluftreifen |
JP6350326B2 (ja) | 2014-06-30 | 2018-07-04 | 株式会社デンソー | ガスセンサ |
JP6492770B2 (ja) * | 2015-02-27 | 2019-04-03 | 横浜ゴム株式会社 | 空気入りタイヤ |
CN105329047A (zh) * | 2015-11-03 | 2016-02-17 | 青岛双星轮胎工业有限公司 | 一种带磨耗标识的轮胎 |
US20190135048A1 (en) * | 2016-05-20 | 2019-05-09 | Bridgestone Americas Tire Operations, Llc | Tire wear indicator |
CN110167763A (zh) * | 2016-11-11 | 2019-08-23 | 株式会社南星 | 脚轮结构 |
US11260495B2 (en) * | 2018-07-27 | 2022-03-01 | Taiwan Semiconductor Manufacturing Company Ltd. | Apparatus and methods for chemical mechanical polishing |
US11413907B2 (en) * | 2020-10-16 | 2022-08-16 | The Goodyear Tire & Rubber Company | Tire with shallow groove-based tread wear indicator |
KR102421211B1 (ko) * | 2020-11-16 | 2022-07-15 | 넥센타이어 주식회사 | 트레드블록의 강성을 보완하는 사이프 구조 |
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US20070295432A1 (en) * | 2006-06-22 | 2007-12-27 | Posada Carlos Santiago Restrep | Tire having wear indication means and a method of manufacturing the tire |
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GB1242219A (en) * | 1967-10-18 | 1971-08-11 | Dunlop Holdings Ltd | Improvements in or relating to pneumatic tyres |
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JP4527968B2 (ja) * | 2003-11-26 | 2010-08-18 | 住友ゴム工業株式会社 | 空気入りタイヤ |
CN201099149Y (zh) * | 2007-11-29 | 2008-08-13 | 昊华南方(桂林)橡胶有限责任公司 | 胎面花纹块具有深度标识的轮胎 |
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JP2013147228A (ja) * | 2012-01-23 | 2013-08-01 | Bridgestone Corp | タイヤ |
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JP2014125119A (ja) * | 2012-12-26 | 2014-07-07 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
-
2013
- 2013-01-10 JP JP2013002790A patent/JP5846131B2/ja not_active Expired - Fee Related
- 2013-12-26 US US14/759,921 patent/US20150343852A1/en not_active Abandoned
- 2013-12-26 CN CN201380069338.6A patent/CN104903123B/zh not_active Expired - Fee Related
- 2013-12-26 DE DE112013006391.3T patent/DE112013006391T5/de not_active Ceased
- 2013-12-26 WO PCT/JP2013/084909 patent/WO2014109248A1/ja active Application Filing
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JPS6243907U (ja) * | 1985-09-06 | 1987-03-17 | ||
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US20070295432A1 (en) * | 2006-06-22 | 2007-12-27 | Posada Carlos Santiago Restrep | Tire having wear indication means and a method of manufacturing the tire |
JP2010047073A (ja) * | 2008-08-20 | 2010-03-04 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2012179966A (ja) * | 2011-02-28 | 2012-09-20 | Sumitomo Rubber Ind Ltd | タイヤのマッド性能を評価する方法 |
Also Published As
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DE112013006391T5 (de) | 2015-09-17 |
US20150343852A1 (en) | 2015-12-03 |
CN104903123B (zh) | 2017-12-12 |
JP5846131B2 (ja) | 2016-01-20 |
CN104903123A (zh) | 2015-09-09 |
JP2014133486A (ja) | 2014-07-24 |
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