• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Provided is a stud pin (50) including an end portion (52) that comes into contact with a road surface; and a buried base portion (54) that is buried in the stud pin installation hole (29) with the end portion (52) fixed to the buried base portion (54) in a projecting manner, the buried base portion (54) extending from a side of the end portion (52) to a side opposite the side of the end portion (52). The buried base portion (54) includes a base body (55), and an annular member (62) mounted on the base body (55), the annular member (62) being able to rotate relative to the base body (55) about an extension direction of the buried base portion (54).
    公开号:FI20206259A1
    申请号:FI20206259
    申请日:2019-04-23
    公开日:2020-12-07
    发明作者:Kenta Homma
    申请人:Yokohama Rubber Co Ltd；
    IPC主号:
    专利说明:

    [0001] [0001] The present invention relates to a stud pin and a pneumatic tire provided with a stud pin.
    [0002] [0002] A studded tire includes stud pins installed in a tread portion and provides grip on icy and snowy road surfaces.
    [0003] [0003] A stud pin includes a buried base portion and an end portion protruding — from one end surface of the buried base portion. The buried base portion is fitted into an installation hole so that the end portion protrudes from the tread surface. The end portion comes into contact with the road surface when the studded tire rolls and bites into the snow and ice. This allows the studded tire to maintain good driving performance on icy and snowy road surfaces in terms of — braking ability, driving ability, and the like.
    [0004] [0004] By the way, one example of a reason why stud pins fall out is that the 2 stud pins rotate in the installation hole. When the stud pin rotates, the stud pin N protrudes from the installation hole and is prone to falling out. N 30 A known stud pin (see Patent Document 1) is provided with a plurality S of protrusion portions in a side surface of a body portion of a pin body, the I protrusion portions protruding from the side surface. The stud pin of Patent = Document 1 is designed to suppress rotation of the stud pin about the axis in 3 the installation hole by the plurality of protrusion portions digging into the S 35 — rubber of the installation hole.
    [0005] [0005] Patent Document 1: JP 2016-130059A Summary of Invention Technical Problem
    [0006] [0006] In the stud pin of Patent Document 1, depending on the magnitude of the force rotating the stud pin, the protrusion portion that digs into the rubber may damage the wall surface of the installation hole. When the wall surface of the — installation hole is damaged, the fastening force of the rubber with respect to the stud pin decreases, making it easier for the stud pin to fall out.
    [0007] [0007] In light of the foregoing, an object of the present invention is to provide a stud pin that does not easily fall out of a stud pin installation hole even when a force acts to rotate the stud pin embedded in the stud pin installation hole and a pneumatic tire provided with the stud pin. Solution to Problem
    [0008] [0008] One aspect of the present invention is a stud pin installable in a stud pin installation hole of a studdable tire. The stud pin includes: an end portion that comes into contact with a road surface; and a buried base portion that is buried in the stud pin installation hole with the end portion fixed to the buried base portion in a projecting manner, the — buried base portion extending from a side of the end portion to a side opposite the side of the end portion.
    [0010] [0010] The base body preferably includes, along the extension direction, 2 a body portion with a flange-like shape, the end portion being fixed to the body portion, a bottom portion with a flange-like shape provided at a portion of the base body furthest away from the end portion, the bottom portion having a larger outer diameter than the body portion, and a shank portion located between the body portion and the bottom portion, the shank portion having a smaller outer diameter than the body portion, and the annular member is mounted on at least one of: the body portion or — the shank portion.
    [0011] [0011] The annular member is preferably disposed in a recess portion space around the shank portion surrounded by the body portion and the bottom portion.
    [0012] [0012] The annular member preferably includes a projection portion projecting to an outer circumferential side from an outer circumferential side surface of the annular member.
    [0013] [0013] The annular member preferably has a shape that extends in a helical manner about a helix axis, the helix axis being the extension direction of the buried base portion.
    [0014] [0014] A length of the annular member along the extension direction of the — buried base portion is preferably from 20 to 40% of a length of the buried base portion in the extension direction.
    [0015] [0015] 2 When the annular member is referred to as a first annular member, the N buried base portion preferably further includes one or a plurality of second N 30 annular members mounted on the base body, the one or the plurality of second S annular members being able to rotate relative to the base body about the I extension direction of the buried base portion. * [0016] 3 A combined length of a length of the first annular member along the S 35 extension direction of the buried base portion and a length of the one or the S plurality of second annular members along the extension direction of the buried base portion is preferably from 20 to 40% of the length of the buried base portion in the extension direction of the buried base portion. 3
    [0017] [0017] An outer diameter of the annular member is preferably from 1.01 to 1.4 times an outer diameter of a portion of the base body where the annular member is mounted.
    [0018] [0018] The annular member is preferably configured to move relative to the base body along the extension direction of the buried base portion.
    [0019] [0019] Another aspect of the present invention is a pneumatic tire. The pneumatic tire includes the stud pin; and a studdable tire including a stud pin installation hole into which the stud pin is installed.
    [0020] [0020] According to the stud pin and the pneumatic tire of the aspects described above, the stud pin does not easily fall out of a stud pin installation hole even when a force acts to rotate the stud pin embedded in the stud pin installation — hole. Brief Description of Drawings
    [0021] [0021] FIG. 1 is a tire cross-sectional view illustrating an example of a cross- — section of a tire of a present embodiment.
    [0022] [0022] Overall Description of Tire Hereinafter, a studded tire of the present embodiment is described. FIG. 1 is a tire cross-sectional view illustrating an example of a cross-section of a studded tire (hereinafter also referred to as "tire") 10 of the present embodiment. FIG. 2 is a perspective view of an example of the tire 10. Note that the present embodiment includes various embodiments described below. The tire 10 is a tire with stud pins embedded in a tread portion (the stud pins are omitted in FIGS. 1 and 2). The tire 10 is, for example, a tire for a passenger vehicle. The tire for a passenger vehicle refers to a tire specified in Chapter A of the JATMA Year Book 2015 (standards of The Japan Automobile Tyre Manufacturers Association, Inc.). The tire can also be a small truck tire specified in Chapter B or a truck tire or bus tire specified in Chapter C. Below, values of the dimensions of various pattern elements are described in detail as example values for a tire for a passenger vehicle. However, the tire 10 is not limited to these example values. > [0023] N "Tire circumferential direction C" described below (see FIG. 2) refers to N 30 — the direction (both rotation directions) the tread surface rotates when the tire 10 S rotates about a tire rotation axis Axis (see FIG. 2). "Tire radial direction R" I refers to the direction that extends radially orthogonal to the tire rotation axis - Axis. "Outer side in the tire radial direction" refers to the side away from the 3 tire rotation axis Axis in the tire radial direction R. "Tire width direction W" S 35 — refers to the direction parallel with the tire rotation axis Axis. "Outer side in the S tire width direction" refers to both sides away from a tire centerline CL (see FIGS. 1 and 3) of the tire 10.
    [0024] [0024] 5
    [0025] [0025] The carcass ply layer 12 includes carcass ply members 12a, 12b that are formed from organic fibers covered with rubber and that are wound between the pair of bead cores 16 of an annular shape so as to be formed into a toroidal shape. In the tire 10 illustrated in FIG. 1, the carcass ply layer 12 is made of the carcass ply members 12a and 12b, but may also be made of a single carcass ply member. The belt layer 14 is provided on the outer side of the carcass ply layer 12 in the tire radial direction and is composed of two belt members 14a, 14b. The belt layer 14 is a member formed from steel cords covered with rubber, the — steel cords being arranged inclined at a predetermined angle, for example, 20 to 30 degrees, with respect to the tire circumferential direction C. The width in the tire width direction of the belt member 14a that is a lower layer is greater than the width of the belt member 14b that is the upper layer. The steel cords of the two layers of the belt members 14a and 14b are inclined from the tire circumferential direction C toward the tire width direction W in mutually different directions. As such, the belt members 14a, 14b are crossing layers serving to suppress expansion of the carcass ply layer 12 due to the inflated air pressure.
    [0026] [0026] The tread rubber 18 is disposed on the outer side of the belt layer 14 in the tire radial direction. Both end portions of the tread rubber 18 connect to the side rubbers 20 to form sidewall portions. The tread rubber 18 is made of two S layers of rubber, namely an upper layer tread rubber 18a provided on the outer N side in the tire radial direction and a lower layer tread rubber 18b provided on N 30 — the inner side in the tire radial direction. The rim cushion rubbers 24 are S provided at the ends on the inner side of the side rubbers 20 in the tire radial I direction, and come into contact with the rim on which the tire 10 is mounted.
    [0027] [0027] The tire 10 has such a tire structure, but the tire structure of the present embodiment is not limited to the tire structure illustrated in FIG. 1.
    [0028] [0028] Tread Pattern FIG. 3 is a developed plan view illustrating a portion of the tread pattern of a tread pattern 30 of the tire 10 developed on a plane. Note that the tread pattern employed in the tire 10 is not limited to the tread pattern 30. The stud pins (see FIG. 4) are mounted in pin installation holes 29 described below. As illustrated in FIG. 3, the tire 10 has a designated rotation direction X indicating a one-way direction along the tire circumferential direction C. The orientation of the rotation direction X is designated by displaying numbers, symbols, and the like on the sidewall surface of the tire 10.
    [0029] [0029] The tread pattern 30 is provided with a plurality of first inclined grooves 31, a plurality of first lug grooves 32, a plurality of second inclined grooves 33, a plurality of third inclined grooves 34, second lug grooves 35, and projecting grooves 36.
    [0030] [0030] The first inclined grooves 31 are provided in plurality in the tire circumferential direction. Each of the first inclined grooves 31 has a position located separated from the centerline CL as a starting end, extends from the starting end in the opposite direction to the tire rotation direction X, and extends at an inclination towards the outer side in the tire width direction. S [0031] N The first lug grooves 32 are provided in plurality in the tire N 30 circumferential direction. The first lug grooves 32 extend from the end portion S of the first inclined grooves 31 on the outer side in the tire width direction in I the opposite direction to the tire rotation direction X and extend at an - inclination towards the outer side in the tire width direction beyond the ground 3 contact edges E1, E2. S 35 The ground contact edges E1, E2 refer to the edge on either side in the S tire width direction of the ground contact surface formed on a flat plate when the tire is mounted on a specified rim, inflated to the specified internal pressure, for example, an internal pressure condition of 200 kPa, and vertically 7 loaded on the flat plate with a load corresponding to 88% of the specified load. Here, "specified rim" refers to a "Measuring Rim" defined by the ETRTO (2011 edition), to an "Applicable Rim" defined by JATMA, or to a "Design Rim" defined by the TRA. Additionally, "specified internal pressure" refers to the maximum value in "INFLATION PRESSURES" defined by ETRTO, in "maximum air pressure” defined by JATMA, or in "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES" defined by TRA. “Specified load" refers to the maximum value in "LOAD CAPACITY" defined by ETRTO, in "maximum load capacity” defined by JATMA, or in "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES" defined by TRA.
    [0032] [0032] The second inclined grooves 33 are provided in plurality in the tire circumferential direction. The second inclined grooves 33 extend from the end portion of the first inclined grooves 31 on the outer side in the tire width direction in the opposite direction to the tire rotation direction X and extend at an inclination towards the inner side in the tire width direction reaching an adjacent first inclined groove 31.
    [0033] [0033] The third inclined grooves 34 are provided in plurality in the tire circumferential direction. Each of the third inclined grooves 34 extends from an intermediate point on the first lug grooves 32 in the opposite direction to the tire rotation direction X and extends at an inclination towards the outer side in the tire width direction. The third inclined grooves 34 have a shape in which the groove width gradually narrows towards the outer side in the tire width direction and gradually widens towards the inner side in the tire width direction.
    [0034] [0034] The second lug grooves 35 extend between two of the first lug grooves N 32 located adjacent to each other in the tire circumferential direction aligned N 30 — with the first lug grooves 32 without crossing with the first inclined grooves 31 S and the second inclined grooves 33. I [0035] = The third inclined grooves 34 extend through the second lug grooves 35. 3 The width of portions 35a of the second lug grooves 35 on the inner side in the S 35 — tire width direction of the crossing sections with the third inclined grooves 34 S is narrower than the width of portions 35b on the outer side in the tire width direction of the crossing sections with the third inclined grooves 34. 8
    [0036] [0036] Sipes 43 are provided in the land portions 41 enclosed by the first inclined grooves 31, the first lug grooves 32, the second inclined grooves 33, and the ground contact edges E1, E2. Also, sipes 44 are provided in land portions 42 on the inner side in the tire width direction of the first inclined grooves 31 and the second inclined grooves 33. The sipes 44 extend substantially parallel with the tire width direction. The sipes 43 incline with — respect to the extension direction of the sipes 44. With the sipes 43 being inclined with respect to the extension direction of the sipes 44, it is possible to increase the turning performance of the tire 10.
    [0037] [0037] Also, stud pin installation holes 29 are provided in the land portions 41 enclosed by the first inclined grooves 31, the first lug grooves 32, the second inclined grooves 33, and the ground contact edges E1, E2, as illustrated in FIG.
    [0038] [0038] Stud Pin FIG. 4 is a perspective view illustrating an example of the stud pin 50 of the present embodiment.
    [0039] [0039] The stud pin 50 includes a tip (end portion) 52 and a buried base portion
    [0041] [0041] The buried base portion 54 supports the tip 52. The body portion 56, the shank portion 60, and the bottom portion 58 are disposed side by side in one direction. The body portion 56, the shank portion 60, and the bottom portion 58 are provided around a central axis that passes through the centroid of the contoured shape of each portion when viewed in one direction. In the example illustrated in FIG. 4, the body portion 56, the shank portion 60, and the bottom portion 58 share a common central axis Z, but in other examples, they may not share a common central axis. The central axis Z extends in a direction parallel with the direction (one direction) in which the body portion 56, the shank portion 60, and the bottom portion 58 are aligned. Material of the buried base portion 54 is not particularly limited and, for example, the buried base portion 54 may be formed from aluminum alloy or the like in order to reduce the weight of the stud pin 50.
    [0042] [0042] The body portion 56 is a flange-like portion in which the tip 52 is fixed along the extension direction of the buried base portion 54. The body portion 56 is configured so that, when embedded in the tread portion of the tire 10, the tip 52 projects from the tread surface. The extension direction of the buried base portion 54 matches the extension direction of the base body 55.
    [0043] [0043] The shank portion 60 is connected to the body portion 56 and the bottom — portion 58. The shank portion 60 is located between the body portion 56 and the bottom portion 58, and is a portion with a smaller outer diameter than the body portion 56. The cross-sectional area orthogonal of the shank portion 60 S orthogonal to the central axis Z is less than the cross-sectional area of the body N portion 56 and the bottom portion 58, and the shank portion 60 is narrower than N 30 — the body portion 56 and the bottom portion 58. Herein, the shank portion 60 S refers to a portion of the buried base portion 54 having a cross-sectional area I less than that of the portion of the body portion 56 where the cross-sectional - area is the greatest as viewed in a cross section orthogonal to the central axis Z, 3 and is connected to the body portion 56 on the bottom portion 58 side. S 35 The outer circumferential side surface of the shank portion 60, as seen in S the example illustrated in FIG. 4, defines a portion of a recess portion space 64 together with the end of the body portion 56 connected to the shank portion 60 and the upper end surface of the bottom portion 58. In other words, the recess 10 portion space 64 is a space around the shank portion 60 surrounded by the body portion 56 and the bottom portion 58.
    [0044] [0044] The bottom portion 58 is a portion of the base body 55 that is positioned furthest away from the tip 52, and is a flange-like portion having a greater outer diameter than the body portion 56. The bottom portion 58 is configured to come into contact with a hole bottom portion of the installation hole 29 when embedded in the tread portion of the tire 10.
    [0045] [0045] The outer circumferential side surface of the base body 55 is preferably configured with a smooth surface in order to allow the base body 55 to rotate while slipping with respect to the wall surface of the installation hole 29 and to prevent damage to the installation hole 29. In the example illustrated in FIG. 4, the cross-sectional shape of the base body 55 in the direction orthogonal to the — central axis Z is circular and has a cylindrical outer circumferential side surface.
    [0046] [0046] Annular Member The annular member 62 is a member mounted on the base body 55 in a — manner allowing it to rotate about the extension direction of the buried base portion 54 (the direction in which the central axis Z extends) relative to the base body 55. The annular member 62 is a member separate from the base body
    [0047] [0047] FIGS. 5(a) and 5(b) are diagrams for explaining the operation of a known stud pin and include a plan view of the upper surface of the stud pin from the extension direction of the central axis and a side view.
    [0049] [0049] The form of the annular member 62 is not particularly limited, and may be, for example, a ring shape (see FIGS. 7, 9, 12), a sleeve shape (see FIGS. 8, 10), a helical shape (see FIG. 11), and the like. FIGS. 7 to 12 are diagrams illustrating examples of stud pins of an embodiment.
    [0050] [0050] A gap is preferably formed between the annular member 62 and the base body 55 so as to facilitate rotation of the base body 55 relative to the annular member 62. For example, the gap is preferably such that the difference between the outer diameter of the portion of the base body 55 on which the annular member 62 is mounted and the inner diameter of the annular member 62 is 1 mm or less, and the gap is preferably sized so that 0.5 mm or less is open on both sides of the central axis Z. When the difference is greater than 1 mm, the region of the base body 55 where the fastening force of the installation hole 29 does not act is large, and the stud pin 50 may be prone to falling out. On the other hand, the annular member 62 and the base body 55 may be in contact with — one another without a gap. Even in such cases, the base body 55 easily rotates relative to the annular member 62 due to the fastening force of the rubber not acting on the portion of the base body 55 where the annular member 62 is S mounted.
    [0052] [0052] According to one embodiment, the annular member 62 is preferably disposed in the recess portion space 64 around the shank portion 60 surrounded by the body portion 56 and the bottom portion 58, as in the examples illustrated in FIGS. 4, 7, 8, 10, and 11. The recess portion space 64 refers to the space on — the central axis Z side of a straight line connecting the end of the outer circumferential side surface of the body portion 56 on the bottom portion 58 side and the end of the outer circumferential side surface of the bottom portion 58 on the body portion 56 side as viewed in a cross section of the stud pin 50 that passes through the central axis Z. When the annular member 62 is disposed — in the recess portion space 64 and a force acts to pull the stud pin 50 out from the installation hole 29 in the extension direction, the annular member 62 constrained by the wall surface of the installation hole 29 comes into contact with the bottom portion 58 to push against the bottom portion 58 in the direction opposite the direction in which the force pulling the stud pin 50 is — acting, thus preventing the stud pin 50 from falling out.
    [0053] [0053] In this regard, according to one embodiment, the annular member 62 is 2 preferably configured to move relative to the base body 55 along the central N axis Z of the buried base portion 54. Furthermore, according to one N 30 embodiment, a recess portion (annular groove) that extends continuously or S intermittently along the circumferential direction of the base body 55 is I preferably provided on the outer circumferential side surface of the base body - 55. The length in the direction along the central axis Z of such a recess portion 3 (groove width of the annular groove) is less than, greater than, or equal to the S 35 length of the annular member 62 in the direction along the central axis Z, for S example.
    [0054] [0054] According to one embodiment, as illustrated in FIG. 10, the annular member 62 preferably includes a projection portion 62b that projects toward the outer circumferential side from an outer circumferential side surface 62a of the annular member 62. Because the projection portion 62b digs into the wall surface of the installation hole 29 due to the fastening force of the rubber of the installation hole 29 acting on the annular member 62, the force of the rubber of the installation hole 29 constraining the annular member 62 is strong, allowing rotation of the annular member 62 with respect to the installation hole 29 to be suppressed. In addition, by the projection portion 62b digging into the wall surface of the installation hole 29, the resistance to the force pulling the stud pin 50 out from the installation hole 29 in the extension direction is increased, and the effect of preventing the stud pin 50 from falling out is increased.
    [0055] [0055] As in the example illustrated in FIG. 10, the annular member 62 may be formed of a combination of a plurality of members divided in the 15 circumferential direction. in this way, the annular member 62 can be easily mounted to the base body 55. In the example illustrated in FIG. 10, the annular member 62 is a combination of three members divided in the circumferential direction.
    [0056] [0056] According to one embodiment, as in the example illustrated in FIG. 11, the annular member 62 preferably has a shape that extends in a helical manner with the central axis Z of the buried base portion 54 acting as the helix axis (a — straight line passing through the center of rotation in a helical manner). In the case in which the annular member 62 has a helical shape, when the stud pin 50 is pulled in the extension direction of the installation hole 29, the annular member 62 constrained in the installation hole 29 elastically deforms, coming into contact with the bottom portion 58 and is contracted in the direction of the — helix axis. Thus, the force pushing in the direction opposite the direction the stud pin 50 is being pulled out from the installation hole 29 is increased. In this regard, the annular member 62 is preferably formed from a wire, such as a hard steel wire, a piano wire, or the like.
    [0057] [0057] According to one embodiment, the length of the annular member along the extension direction of the buried base portion 54 preferably ranges from 20 to 40% of the length of the buried base portion 54 in the extension direction. When the length of the annular member is greater than 40% of the length of the N buried base portion 54, the contact area between the rubber of the installation N 30 hole 29 and the base body 55 is too small, and the fastening force of the rubber S with respect to the stud pin 50 decreases, making it easier for the stud pin 50 to I fall out. When the length of the annular member is less than 20% of the length - of the buried base portion 54, the contact area between the wall surface of the 3 installation hole 29 and the base body 55 is too great, and it may be difficult for S 35 — the base body 55 to rotate relative to the installation hole 29. Preferably, the S length of the annular member ranges from 25 to 35% of the length of the buried base portion 54. 16
    [0058] [0058] According to one embodiment, when the annular member 62 is referred to as a first annular member, the buried base portion 54 preferably includes one — or a plurality of second annular members 72a, 72b, ..., 72i and the like mounted on the base body 55 so as to rotate relative to the base body 55 about the extension direction of the buried base portion 54, as illustrated in FIGS. 7, 9, and 12. The above-described configuration of the annular member 62 can also be applied to the second annular member.
    [0059] [0059] According to one embodiment, the plurality of annular members mounted at different portions of the base body 55 preferably have different configurations, as in the example illustrated in FIG. 12. For example, in the example illustrated in FIG. 12, the outer diameter of the annular members 62, 72a, 72b mounted on the body portion 56 is greater than the outer diameter of the annular members 72c, ..., 721 mounted on the shank portion 60.
    [0060] [0060] According to the stud pin 50 described above, when a force acts on the — stud pin 50 to rotate the stud pin 50 about the central axis Z, compared to when the annular member 62 is not mounted, the base body 55 easily rotates relative to the annular member 62 and the wall surface of the installation hole 29 that constrains the annular member 62. In this manner, by allowing rotation by a force acting to rotate the stud pin 50 in the initial stages, it is possible to — suppress the development of rotation that inclines the stud pin in the installation hole 29 and widens the installation hole 29, leading to the stud pin falling out.
    [0061] [0061] Examples, Conventional Example In order to investigate the effects of the present invention, stud pins of various specifications were manufactured, and the manufactured stud pins were embedded in the tread portion illustrated in FIGS. 1 to 3 of a tire, and this tire was mounted on a passenger vehicle and pin drop resistance was investigated. The size of each manufactured tire was 205/55R16. The passenger vehicle used — was a front-wheel drive sedan with an engine displacement of 2000 cc. The internal pressure condition of the tires was 230 (kPa) for both the front wheels and rear wheels. The load condition of the tires was a 450 kg load on the front wheels and a 300 kg load on the rear wheels.
    [0062] [0062] The stud pin falling out of the installation hole seldom occurs on icy road surfaces, but easily occurs on dry road surfaces, such as an asphalt road surface or a concrete road surface. In addition, pin drop easily occurs and may 2 be caused by the rotation of the stud pin when the vehicle turns. Thus, for the N test for how hard it is for stud pins to fall out (pin drop resistance), the N 30 proportion of the number of stud pins remaining in the tread rubber to the total S number of mounted stud pins was obtained after the vehicle had traveled 10000 I km on a predetermined dry road surface course including an asphalt road = surface and a concrete road surface. The proportion was expressed as an index 3 value, with the proportion of Conventional Example assigned an index value of S 35 100. Higher index values indicate that the stud pins were less likely to fall out, S and index values of 102 or greater are evaluated as having excellent pin drop resistance.
    [0063] [0063] 18
    [0064] [0064] [Table 1] Conventional [Example [Example Example| Example |Example| Example | Example | Example Example 1 2 3 4 5 6 7 8 mom | > Jos [Hos] nor [ro [ros [row [mo [oo Presence of S annular No Yes Yes Yes Yes Yes Yes Yes Yes
    [0065] [0065] Comparing Examples 1 to 7 to the Conventional Example, it can be seen that the stud pin provided with the annular member has superior pin drop resistance.
    [0066] [0066] A stud pin and a pneumatic tire according to an embodiment of the present invention have been described above. However, it should be understood that the present invention is not limited to the above embodiments and examples, and may be improved or modified in various ways so long as these improvements or modifications remain within the scope of the present Q 20 invention.
    N N Reference Signs List S [0067] z 10 Pneumatic tire + 25 12 Carcass ply layer ö 14 Belt layer < 14a, 14b Belt member 16 Bead core 18 Tread rubber 30 18a Upper layer tread rubber
    18b Lower layer tread rubber 20 Side rubber 22 Bead filler rubber 24 Rim cushion rubber 26 Innerliner rubber 28 Belt cover layer 29 Pin installation hole 30 Tread pattern 31 First inclined groove 32 First lug groove 33 Second inclined groove 34 Third inclined groove 35 Second lug groove 36 Projecting groove 41,42 Land portion 43, 44 Sipe 50 Stud pin 52 Tip (end portion) 54 Buried base portion 55 Base body 56 Body portion 58 Bottom portion 60 Shank portion 62 Annular member (first annular member) 62a Outer circumferential side surface 62b Projection portion 72a, 72b, 72c, 72d, 72e, 721, 72 g, 72h, 721 Annular member (second annular oO member)
    N N 64 Recess portion spaceNNO
    I a a oLO
    N ©ONO
    N 21
    权利要求:
    Claims (11)
    [1] Claims [Claim 1] A stud pin installable in a stud pin installation hole of a studdable tire, comprising: an end portion that comes into contact with a road surface; and a buried base portion configured to be buried in the stud pin installation hole with the end portion fixed to the buried base portion in a projecting manner, the buried base portion extending from a side of the end portion to a side opposite the side of the end portion, the buried base portion comprising a base body, and an annular member mounted on the base body, the annular member being able to rotate relative to the base body about an extension direction of the buried base portion. [Claim 2] The stud pin according to claim 1, wherein the base body comprises, along the extension direction, a body portion with a flange-like shape, the end portion being fixed to the body portion, a bottom portion with a flange-like shape provided at a portion of the base body furthest away from the end portion, the bottom portion having a larger outer diameter than the body portion, and a shank portion located between the body portion and the bottom portion, the shank portion having a smaller outer diameter than the body portion, and S the annular member is mounted on at least one of: the body portion or N the shank portion.
    N = [Claim 3] I The stud pin according to claim 2, wherein = the annular member is disposed in a recess portion space around the 3 shank portion surrounded by the body portion and the bottom portion. ©
    N S [Claim 4] The stud pin according to any one of claims 1 to 3, wherein 22 the annular member comprises a projection portion projecting to an outer circumferential side from an outer circumferential side surface of the annular member. [Claim 5] The stud pin according to any one of claims 1 to 4, wherein the annular member has a shape that extends in a helical manner about a helix axis, the helix axis being the extension direction of the buried base portion. [Claim 6] The stud pin according to any one of claims 1 to 5, wherein a length of the annular member along the extension direction of the buried base portion is from 20 to 40% of a length of the buried base portion in the extension direction. [Claim 7] The stud pin according to any one of claims 1 to 6, wherein when the annular member is referred to as a first annular member, the buried base portion further comprises one or a plurality of second annular members mounted on the base body, the one or the plurality of second annular members being able to rotate relative to the base body about the extension direction of the buried base portion. [Claim 8] The stud pin according to claim 7, wherein a combined length of a length of the first annular member along the S extension direction of the buried base portion and a length of the one or the N plurality of second annular members along the extension direction of the buried N base portion is from 20 to 40% of the length of the buried base portion in the S extension direction of the buried base portion. x > [Claim 9] D The stud pin according to any one of claims 1 to 8, wherein S an outer diameter of the annular member is from 1.01 to 1.4 times an S outer diameter of a portion of the base body where the annular member is mounted. 23
    [Claim 10] The stud pin according to any one of claims 1 to 9, wherein the annular member is configured to move relative to the base body along the extension direction of the buried base portion. [Claim 11] A pneumatic tire, comprising: the stud pin according to any one of claims 1 to 10; and a studdable tire comprising a stud pin installation hole into which the stud pin is installed. o
    N
    O
    N
    N
    K
    O
    I a a o
    LO
    N ©
    O
    N
    O
    N 24
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    同族专利:
    公开号 | 公开日
    JP2019196023A|2019-11-14|
    WO2019216186A1|2019-11-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH0332482B2|1983-04-08|1991-05-13|Hiroo Hojo|
    JPS60104402A|1983-11-08|1985-06-08|Agency Of Ind Science & Technol|Spike tire|
    JPS60119604U|1984-01-24|1985-08-13|
    JPS61169704U|1985-04-09|1986-10-21|
    JPS62253503A|1986-04-25|1987-11-05|Toshio Takayama|Spike for automobile tire|
    JPH02182506A|1989-01-09|1990-07-17|Tadahiro Shinpo|Tire with detachable slip-preventive spike pins|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2018089035A|JP7035778B2|2018-05-07|Stud pins and pneumatic tires|
    PCT/JP2019/017135|WO2019216186A1|2018-05-07|2019-04-23|Stud pin and pneumatic tire|
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