Tire provided with cut portion having embossed shape formed therein

Abstract

An embodiment of the present invention provides a tire provided with a cut portion in which a protrusion portion having a certain shape and a recess portion having a shape corresponding to the protrusion portion are formed, thereby preventing a block from being twisted, through the formation of the cut portion, and preventing collapse of a tire block by means of interlocking between the protrusion portion and the recess portion. In the tire provided with the cut portion having an embossed shape formed therein, according to an embodiment of the present invention, the cut portion comprises a recess portion formed by recessing the inner wall surface of the cut portion, and a protrusion portion protruding from the inner wall surface of the cut portion, wherein one recess portion and one protrusion portion are formed to have mutually corresponding shapes and are located adjacent to each other, and the protrusion portion has an umbrella shape or a shape having a bow-shaped cross-section that is perpendicular to the lengthwise direction of the cut portion.

Description

A tire having an incision with an embossed shape

[0001] The present invention relates to a tire having an incision portion having an embossed shape, and more specifically, to a technology for preventing twisting of the block by forming a protrusion of a predetermined shape and a groove of a corresponding shape in the incision portion, and preventing collapse of the tire block by interlocking of the protrusion and the groove portion.

[0002]

[0003] The tread of a pneumatic tire that contacts the road surface forms a specific pattern to provide grip, drainage, braking power, and noise dispersion. Depending on the shape of the pattern, it has a significant impact on handling performance on dry, wet, and snowy roads, and this is a major factor in tire development.

[0004] Meanwhile, cutouts such as cuffs are grooves that are thin and deep, mainly cut in the transverse direction in the tread blocks, which provide a comfortable ride by cushioning while evenly distributing the contact surface and improving grip, and increase driving and braking forces by promoting drainage.

[0005] Generally, in the case of flat blades, there is no constraint in the direction perpendicular to the road surface, resulting in low rigidity of the tread section and consequently a decrease in performance during rescue operations.

[0006] Korean Registered Patent No. 10-1739506 (Title of Invention: Tire Pattern Maximizing Noise, Snow, and Wet Performance through Application of 3D Zipper Slots and Blades) discloses a first groove formed in a tread block; a second groove formed on one side of the first groove; wherein the first groove has a zigzag shape and includes an inclined surface formed to slope from the upper surface to the lower surface of the tread block, and the second groove has a straight shape before tire wear and includes a zigzag shape exposed as the tire wears, and wherein the first groove and the second groove are formed alternately.

[0007] However, these conventional technologies have a problem in that the incision (cuff, etc.) formed by the blade has low functional performance in maintaining locking in a direction perpendicular to the ground, and is particularly vulnerable to block twisting. Therefore, it is essential to develop an embossed incision that maintains locking of the incision and prevents block twisting.

[0008]

[0009] (Prior Art Literature)

[0010] Republic of Korea Registered Patent No. 10-1739506

[0011]

[0012] The objective of the present invention to solve the above-mentioned problems is to form an embossed blade so that the cut portion formed during the vulcanization die prevents block twisting.

[0013] In addition, the objective of the present invention is to increase the maximum friction force and road surface contact rate of the tire by forming an embossed cut portion.

[0014] Furthermore, the objective of the present invention is to prevent the collapse of the tire block by forming a protrusion and a groove of a corresponding shape in the cut portion, thereby interlocking the protrusion and the groove.

[0015] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0016]

[0017] The present invention, for achieving the above-mentioned purpose, comprises a tire having a tread and an incision formed in the tread, wherein the incision comprises a groove formed by the indentation of the inner wall surface of the incision and a protrusion formed by protruding from the inner wall surface of the incision, wherein one groove and one protrusion are formed in corresponding shapes and are positioned adjacent to each other, and the protrusion is characterized by having an umbrella shape or a shape in which the cross-section perpendicular to the longitudinal direction of the incision is arc-shaped.

[0018] In an embodiment of the present invention, mutually corresponding grooves and protrusions form a single embossing set, and each of the plurality of embossing sets may be formed spaced apart from each other.

[0019] In an embodiment of the present invention, the position of the groove and the protrusion of one of the plurality of embossing sets is opposite to the position of the groove and the protrusion of another embossing set, and the one embossing set and the other embossing set may be arranged alternately.

[0020] In an embodiment of the present invention, each of the plurality of embossing sets may have the same shape.

[0021] In an embodiment of the present invention, the one embossing set may have a plurality of protrusions and a plurality of grooves.

[0022] In an embodiment of the present invention, the height (H) of the embossing set may be formed to be 80% or less of the depth (D) of the cut portion.

[0023] In an embodiment of the present invention, the protrusion may have a band formed in a convex shape on one part of the protrusion.

[0024] In an embodiment of the present invention, the groove may have a band formed in a convex shape on one part of the groove.

[0025] In an embodiment of the present invention, when the protrusion has a cross-section perpendicular to the longitudinal direction of the cut portion that is arc-shaped, the groove also has a cross-section perpendicular to the longitudinal direction of the cut portion that is arc-shaped, and in each of the groove and the protrusion, the cross-section perpendicular to the depth (D) direction of the cut portion may have a trapezoidal shape.

[0026] In an embodiment of the present invention, when the protrusion is in the shape of an umbrella, the joining surface of the protrusion that joins to the inner wall surface of the cut portion may be formed as a polygon.

[0027] In an embodiment of the present invention, the cross-sectional shape of the protrusion horizontal to the depth direction of the incision may be formed as a surface shape formed by connecting a plurality of points spaced apart at equal distances from the center point of the protrusion.

[0028] In an embodiment of the present invention, in each of the groove and the protrusion, the cross-sectional shape perpendicular to the inner wall surface of the cut portion and passing through the center point of each of the groove and the protrusion may have an arc shape.

[0029] In an embodiment of the present invention, one of the protrusions and another of the protrusions may be formed with different volumes from each other.

[0030] In an embodiment of the present invention, among a plurality of protrusions arranged in a plurality of rows and columns, the midpoints of the other protrusions and the other protrusions located in each of the other rows adjacent to the one row and the other protrusions adjacent to the one protrusion, respectively, and the midpoints of the other protrusions and the other protrusions located in each of the other rows adjacent to the one row and the other protrusions adjacent to the one protrusion, may be spaced apart from the reference line.

[0031]

[0032] The effect of the present invention according to the above configuration is that by using a blade with an embossed surface during the vulcanization die, the cut portion formed in the tire prevents block twisting.

[0033] In addition, the effect of the present invention is to increase the maximum friction force and road surface contact rate of the tire by forming protrusions and grooves inside the cut portion of the tire.

[0034] In addition, the effect of the present invention is to prevent the collapse of the tire block by forming an incision that is constrained in a direction perpendicular to the road surface, and to increase the maximum friction force and road surface contact rate of the tire.

[0035] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims.

[0036]

[0037] FIG. 1 is a front view of a blade according to a first embodiment of the present invention.

[0038] FIG. 2 is a schematic diagram of a side view of a blade and a cross-section of an incision portion according to a first embodiment of the present invention.

[0039] FIG. 3 is an image related to the shape of a protrusion according to the first embodiment of the present invention.

[0040] FIG. 4 is a cross-sectional view and a front view of a protrusion according to a first embodiment of the present invention.

[0041] FIG. 5 is a perspective view of a blade according to each embodiment.

[0042] FIG. 6 is a schematic diagram of a blade according to each embodiment of the present invention.

[0043] FIG. 7 is a perspective view of a block having an incision formed therein according to a first embodiment of the present invention.

[0044] FIG. 8 is a perspective view showing the contact area between the protrusion and the groove according to the first embodiment of the present invention.

[0045] FIG. 9 is an image showing the road surface contact area of ​​a block with an incision formed according to each embodiment of the present invention.

[0046] FIG. 10 is a graph related to the maximum friction coefficient of a block according to each embodiment of the present invention.

[0047] FIG. 11 is a perspective view of a blade according to a second embodiment of the present invention.

[0048] FIG. 12 is a front view and an enlarged view of a blade according to a second embodiment of the present invention.

[0049] FIG. 13 is a schematic diagram of a side view of a blade and a cross-section of an incision portion according to a second embodiment of the present invention.

[0050] FIG. 14 is an image related to the shape of a protrusion according to a second embodiment of the present invention.

[0051] FIG. 15 is a front view of a blade for the formation of an embossing set according to each embodiment of the present invention.

[0052] FIG. 16 is a perspective view of a block with an incision formed in a second embodiment of the present invention.

[0053] FIG. 17 is a perspective view of a blade according to each embodiment.

[0054] FIG. 18 is a perspective view showing the contact area between the protrusion and the groove according to a second embodiment of the present invention.

[0055] FIG. 19 is an image showing the road surface contact area of ​​a block with an incision formed according to each embodiment of the present invention.

[0056] FIG. 20 is a graph related to the maximum friction coefficient of a block according to each embodiment of the present invention.

[0057]

[0058] A tire comprising a tread and an incision formed in the tread, wherein the incision comprises a groove formed by the indentation of the inner wall surface of the incision and a protrusion formed by protruding from the inner wall surface of the incision, wherein one groove and one protrusion are formed in corresponding shapes and are located adjacent to each other, and the protrusion has an umbrella shape or a shape in which the cross-section perpendicular to the longitudinal direction of the incision is arc-shaped.

[0059]

[0060] The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0061] Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0062] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0063] Hereinafter, the present invention will be described in detail with reference to the attached drawings.

[0064]

[0065] First, a first embodiment of the present invention will be described.

[0066] FIG. 1 is a front view of a blade according to a first embodiment of the present invention, FIG. 2 is a schematic diagram of a side view and a cross-section of a cut portion of a blade according to a first embodiment of the present invention, and FIG. 3 is an image related to the shape of a protrusion according to a first embodiment of the present invention.

[0067] Here, (a) of FIG. 2 is a side view of the blade, and (b) and (c) of FIG. 2 are schematic diagrams of the cross-section of the cut portion (200).

[0068] FIG. 4 is a cross-sectional view and a front view of a protrusion according to a first embodiment of the present invention, FIG. 5 is a perspective view of a blade according to each embodiment, and FIG. 6 is a schematic diagram of a blade according to each embodiment of the present invention.

[0069] FIG. 7 is a perspective view of a block (10) having a cut portion (200) formed according to a first embodiment of the present invention, FIG. 8 is a perspective view showing the contact area between a protrusion and a groove portion according to a first embodiment of the present invention, FIG. 9 is an image showing the road surface contact area of ​​a block having a cut portion formed according to each embodiment of the present invention, and FIG. 10 is a graph related to the maximum friction coefficient of a block according to each embodiment of the present invention.

[0070]

[0071] As seen in FIGS. 1, 2 and FIGS. 5 and 6, the blade may include a frame (100) formed in a plate shape, a first convex portion (121a) formed by the other side surface of one part of the frame (100) being indented and the other side surface of one part of the frame (100) being protruded; and a second convex portion (122a) formed by the other side surface of another part of the frame (100) being indented and the other side surface of another part of the frame (100) being protruded.

[0072] The frame (100) may include an embossing portion (120a), which is an area where a first convex portion (121a) and a second convex portion (122a) are formed in the frame (100); a coupling portion (110), which is formed in a plate shape and extends to one side from the embossing portion (120a); and a blade upper portion (130), which is formed in a plate shape and extends to the other side from the embossing portion (120a). At this time, the coupling portion (110) may be coupled with a mold, and the blade upper portion (130) may penetrate into the inside of the tire and be coupled with the tire.

[0073] The blade is coupled to the vulcanization die, allowing for the formation of a long incision during the vulcanization process.

[0074] Each of the two wall surfaces of the joint part (110) can be formed in the shape of a continuous surface, the height of the joint part (110) can be formed to be 10% to 50% of the height of the frame (100), and the thickness of the joint part (110) can be formed to be 0.2mm or more.

[0075] As a result, the tire block (10) formed by the joint (110) can be provided with a driving performance on a wet road surface such as snow or rain by means of the cut portion (200), and can be provided with a drainage effect at the bottom of the tread block (10) on a wet road surface.

[0076] As shown in FIG. 1, the frame (100) can be formed as a flat plate without embossing portions (120a) at both ends of the S1 section along the longitudinal direction of the frame (100), so as to facilitate mold insertion. Additionally, a plurality of embossing portions (120a) can be formed spaced apart with a gap to prevent offset interference caused by thickness.

[0077] The details regarding the shape of the recessed space and the shape of the outer surface of each convex part (121a, 122a) are the same as the details regarding the specific shapes of the groove and protrusion described below that correspond to the shape of the convex part (121a, 122a).

[0078] The thickness of the frame (100) in a direction perpendicular to the length direction of the joint part (110), the embossing part (120a), and the blade upper part (130) may be partially changed to minimize the reduction of durability, and may be applicable to a part of the embossing part (120a) or the entire embossing part (120a).

[0079]

[0080] FIG. 3(a) shows the cross-sectional shape of the protrusions (201a, 203a) as a cross-section perpendicular to the longitudinal direction of the cut portion (200), FIG. 3(b) is a perspective view of the protrusions (201a, 203a), FIG. 4(a) shows the cross-sectional shape of the protrusions (201a, 203a) perpendicular to the depth (D) direction of the cut portion (200), and FIG. 4(b) is a front view of the protrusions (201a, 203a).

[0081] As seen in FIG. 3(a), the cross-sectional shape of the protrusion (201a, 203a) perpendicular to the longitudinal direction of the cut portion (200) can be formed as an arc shape that includes at least a portion of a circle, and the height of the protrusion (201a, 203a) can be formed as W.

[0082] As seen in FIG. 3(b), the protrusions (201a, 203a) can be formed in the shape of an arcuate column, with the cross-section of FIG. 3(a) having the shape of a part of a circle.

[0083] As seen in FIG. 4(a), in the shape of the cross-section of the protrusion (201a, 203a) perpendicular to the depth (D) direction of the cut portion (200), the protrusion (201a, 203a) may be formed such that one end and the other end of the arcuate column taper from the top end of the arcuate column toward the bottom end of the arcuate column.

[0084] And, as seen in FIG. 4(b), in an arc column with a horizontal length L and a vertical length W, a projection (201a, 203a) can be formed tapered in the direction of the left and right corners at the top of the arc column, spaced apart from the left and right corners of the arc column by a distance of (Ll) / 2.

[0085] As seen in FIG. 4(a), the cross-sectional shape of the protrusion (201a, 203a) perpendicular to the depth (D) direction of the cut portion (200) can be formed in a trapezoidal shape, the length of the upper surface of the trapezoid can be formed as l, the length of the lower surface can be formed as L, and the distance between the upper surface and the lower surface can be formed as h.

[0086] At this time, the locking effect and road surface contact rate of the cut portion (200) formed by the blade can be adjusted by adjusting the length h and the size (W*L) of the maximum contact area.

[0087] The angle from the left corner of the protrusion (201a, 203a) to the bottom surface can be formed as α, and the angle from the right corner of the protrusion (201a, 203a) to the bottom surface can be formed as β. At this time, the angle of the corner can be modified according to the shape and use.

[0088]

[0089] In a tire having a tread and an incision (200) formed in the tread, the incision (200) includes a groove (202a, 204a) formed by the inner wall surface of the incision (200) being sunken, and a protrusion (201a, 203a) formed by protruding from the inner wall surface of the incision (200), wherein one groove and one protrusion are formed in a shape corresponding to each other and are located adjacent to each other.

[0090] Specifically, protrusions (201a, 203a) and grooves (202a, 204a) may be formed on the inner wall surface of the cut section (200) by convex sections (121a, 122a) having a recessed space formed by the recess of the frame (100).

[0091] Here, one groove and one protrusion form one embossing set, and each of the multiple embossing sets can be formed spaced apart from each other.

[0092] Specifically, as seen in FIG. 2 (b) and (c), the first protrusion (201a) and the first groove (202a) can form the first embossing set, and the second protrusion (203a) and the second groove (204a) can form the second embossing set.

[0093] One side and the other side of the recessed space of the convex portion (121a, 122a) corresponding to the shape of the protrusion (201a, 203a) as described above is formed in a tapered shape, and an incision (200) can be formed in the tire by a vulcanization process using a blade.

[0094] Accordingly, one groove and one protrusion are formed with corresponding shapes, so that in one embossing set, one groove can be formed to surround one protrusion.

[0095] At this time, when force is applied to the block (10), the distance between the groove and the protrusion is reduced, and the groove contacts the protrusion in a shape that surrounds it, thereby increasing the coefficient of friction with the ground and increasing the ground contact rate, and restraining the block (10) in a direction perpendicular to the road surface to prevent the block (10) from collapsing.

[0096] In particular, in one embossing set, the cross-section of one groove and one protrusion is formed in a trapezoidal shape with tapered sides, so that when one groove and one protrusion come into contact, the bonding force can be increased, and the twisting of the block (10) can be prevented due to the bonding force of the groove and the protrusion.

[0097]

[0098] The joining surface of the protrusions (201a, 203a) that join to the inner wall surface of the cut portion (200) may be square. Additionally, in each of the groove portions (202a, 204a) and the protrusions (201a, 203a), the shape of the cross-section of the cut portion (200) perpendicular to the length direction of the cut portion (200) may be formed in a trapezoidal shape.

[0099] At this time, the shape of the groove portion (202a, 204a) may be formed to correspond to the shape of the recessed space of the convex portion (121a, 122a), and the shape of the protrusion portion (201a, 203a) may be formed to correspond to the shape of the outer surface of the convex portion (121a, 122a). At this time, the cross-sectional shape of the groove portion (202a, 204a) may be the cross-sectional shape of the internal space of the groove portion (202a, 204a). The same applies below.

[0100] In each of the groove (202a, 204a) and the protrusion (201a, 203a), the cross-sectional shape perpendicular to the length direction of the cut portion (200) may be arc-shaped. In each of the groove (202a, 204a) and the protrusion (201a, 203a), the cross-sectional shape perpendicular to the height direction of the protrusion (201a, 203a) may be formed as a square shape.

[0101]

[0102] In one embodiment, the positions of the groove and protrusion of one of the multiple embossing sets are opposite to the positions of the groove and protrusion of another embossing set, and one embossing set and another embossing set can be arranged alternately.

[0103] In this case, specifically, a first protrusion (201a) is formed on one inner wall surface of the cut portion (200) and a first groove (202a) is formed on the other inner wall surface of the cut portion (200) to form a first embossing set, and a second protrusion (203a) is formed on the other inner wall surface of the cut portion (200) and a second groove (204a) is formed on one inner wall surface of the cut portion (200) to form a second embossing set.

[0104] And, such first embossing sets and second embossing sets may be arranged alternately, and a plurality of first embossing sets and a plurality of second embossing sets may be formed along the length direction of the cut portion (200).

[0105] For the shape of such an incision (200), in the frame (100), a first convex portion (121a) is formed on one side surface of the frame (100) and a second convex portion (122a) is formed on the other side surface of the frame (100), and such first convex portion (121a) and second convex portion (122a) are alternately arranged, and a plurality of first convex portions (121a) and a plurality of second convex portions (122a) may be formed along the length direction of the frame (100).

[0106]

[0107] As another embodiment, a plurality of embossing sets are formed, and the shape of each of the plurality of embossing sets may be identical.

[0108] In such a case, specifically, a first protrusion (201a) is formed on one inner wall surface of the cut portion (200) and a first groove (202a) is formed on the other inner wall surface of the cut portion (200) to form a first embossing set, and such a first embossing set may be arranged continuously. Alternatively, a second protrusion (201a) is formed on the other inner wall surface of the cut portion (200) and a second groove (202a) is formed on the other inner wall surface of the cut portion (200) to form a second embossing set, and such a second embossing set may be arranged continuously.

[0109] For the shape of such an incision (200), in the frame (100), a first convex portion (121a) may be formed on one side surface of the frame (100) and such first convex portions (121a) may be arranged continuously. Alternatively, a second convex portion (122a) may be formed on the other side surface of the frame (100) and such second convex portions (122a) may be arranged continuously.

[0110] The height (H) of the embossing set can be formed to be 80% or less of the depth (D) of the cut portion (200). If the height of the embossing set exceeds 80%, the space between the upper and lower parts of the embossing set in the cut portion (200) of the tire is reduced, and drainage performance, etc., may be significantly reduced.

[0111]

[0112] The protrusions (201a, 203a) may be provided with a band (210a) formed in a convex shape on a part of the protrusions (201a, 203a). Additionally, the grooves (202a, 204a) may be provided with a band (210a) formed in a convex shape on a part of the grooves (202a, 204a).

[0113] By adjusting the partial thickness of each of the protrusions (201a, 203a) and grooves (202a, 204a) through such a band (210a), the contact rate of the cut portion (200) can be increased and the friction coefficient of the tire can be increased.

[0114] As a result, the friction coefficient and road surface contact rate of the cut section (200) can be increased by considering the formation location of the cut section (200) and the force applied to each location, and the characteristic deviation within the cut section (200) can be equalized by equalizing the characteristics according to the location of the cut section (200).

[0115] To form the band (210a) as described above, the convex portions (121a, 122a) of the blade may further be provided with an auxiliary portion (123a) formed in a concave shape on a part of the outer or inner surface of the convex portions (121a, 122a). Here, the inner surface of the convex portions (121a, 122a) is the surface of the recessed space of the convex portions (121a, 122a).

[0116] Since the band (210a) is formed by the auxiliary part (123a), the details regarding the shape, arrangement, etc. of the band (210a) may be applied to the details regarding the auxiliary part (123a) described below.

[0117]

[0118] As shown in FIG. 6(a), in order to form a plurality of embossing sets of the above-mentioned embodiment, a first convex portion (121a) and a second convex portion (122a) formed in the embossing portion (120a) may be arranged alternately.

[0119] In this way, when a blade having a plurality of alternating first convex portions (121a) and second convex portions (122a) is mounted in a vulcanization mold and a vulcanization process is performed, protrusions are alternately formed in the cut portion (200) formed therein, so that the force applied to the block (10) can be dispersed, and the convex portions (121a, 122a) are alternately arranged on one side and the other side in the longitudinal direction of the frame (100), so that the characteristic deviation according to the directionality of the cut portion (200) can be reduced during the vulcanization process.

[0120] As seen in FIGS. 6(b) to 6(c), the embossing portion (120a) may further include an auxiliary portion (123a) formed in the shape of a recessed groove on the outer or inner surface of the convex portion (121a, 122a).

[0121] The auxiliary portion (123a) can be formed on the entirety of the plurality of convex portions (121a, 122a) formed on one blade, or on some of the plurality of convex portions (121a, 122a) formed on one blade.

[0122] As a result, the band (210a) formed by the auxiliary part (123a) can adjust the partial thickness of the protrusions (201a, 203a) to increase the contact rate of the cut portion (200) formed by the blade and increase the friction coefficient.

[0123] Additionally, the auxiliary portion (123a) can be formed by adjusting it to various positions, such as the central portion of a convex portion or a portion adjacent to the edge, and accordingly, the band (210a) can be formed by adjusting it to various positions, such as the central portion of a protrusion (201a, 203a) or a portion adjacent to the edge of a groove (202a, 204a).

[0124] Additionally, as shown in FIGS. 6(d) to 6(f), a plurality of convex portions (121a, 122a) may be formed at a predetermined distance apart along the longitudinal direction of the frame (100), while the first convex portion (121a) and the second convex portion (122a) may be arranged along the height direction of the frame (100). That is, a plurality of convex portions may be arranged in a manner that forms a matrix.

[0125] At this time, just as in the arrangement in the length direction of the frame (100), when arranged in the height direction of the frame (100), the first convex portion (121a) and the second convex portion (122a) may be arranged alternately, or the first convex portion (121a) or the second convex portion (122a) may be arranged continuously.

[0126] Corresponding to the arrangement of the plurality of convex portions (121a, 122a) as described above, the plurality of protrusions (211, 203a) may be arranged in a manner that forms a matrix, and correspondingly, the plurality of groove portions (202a, 204a) may also be arranged in a manner that forms a matrix.

[0127] At this time, when considering the blades disclosed in each of FIGS. 6(d) to FIGS. 6(f), in one incision (200), the length, height, or thickness of one adjacent protrusion and another protrusion among the plurality of protrusions (211, 203a) arranged in a matrix direction with respect to the inner surface of the incision (200) may be different, the shape of the two protrusions themselves may also be different, and the position of the band (201a) may also be different. The same applies to the plurality of grooves.

[0128]

[0129] Hereinafter, test data using tires manufactured using the blades of each embodiment will be described.

[0130] FIG. 5(a) is a perspective view of a flat blade, which is a general blade of Example 1; FIG. 5(b) is a perspective view of a blade of Example 2; FIG. 5(c) is a perspective view of a blade of Example 3; and FIG. 5(d) is a perspective view of a blade having an auxiliary part (123a) as Example 4.

[0131] Here, the tire manufactured by the blade of Example 1 may be called the first tire, the tire manufactured by the blade of Example 2 may be called the second tire, the tire manufactured by the blade of Example 3 may be called the third tire, and the tire manufactured by the blade of Example 4 may be called the fourth tire.

[0132]

[0133] (Table 1. Friction and road surface grip rate according to blade shape)

[0134] As shown in Table 1, the maximum friction of the second tire increased by 4.2% compared to the maximum friction of the first tire, and the road surface grip rate of the second tire increased by 4.7% compared to the road surface grip rate of the first tire.

[0135] In addition, it can be seen that the maximum friction of the third tire increased by 5.0% compared to the maximum friction of the first tire, and the road surface grip rate of the third tire increased by 8.3% compared to the road surface grip rate of the first tire.

[0136] Also, it can be seen that the maximum friction of the fourth tire increased by 5.6% compared to the maximum friction of the first tire, and the road surface grip rate of the fourth tire increased by 9.0% compared to the road surface grip rate of the first tire.

[0137] As a result, when the cut portion (200) is formed by a blade having the embossing shape as described above, it can be seen that the road surface contact rate and maximum friction force increase due to the interlocking of the protrusions and grooves within the cut portion (200).

[0138]

[0139] In FIG. 10, Example 1 represents the first tire, Example 2 represents the second tire, Example 3 represents the third tire, and Example 4 represents the fourth tire.

[0140] As shown in Fig. 10, in a graph where the x-axis represents the slip length and the y-axis represents the coefficient of friction, for the first tire, as the distance increases, the coefficient of friction increases up to about 1 mm, then decreases at 1 mm, and at about 2 mm, the coefficient of friction is maintained at about 0.62.

[0141] In the case of the second to fourth tires, it can be seen that the coefficient of friction increases as the distance increases, and then stabilizes at approximately 0.65 at about 2 mm. At this time, it can be seen that the coefficient of friction of the fourth tire is slightly higher than that of the third tire, and the coefficient of friction of the third tire is slightly higher than that of the second tire.

[0142] Interlocking within the cut section (200) can be induced by the protrusions (201a, 203a) and grooves (202a, 204a) to increase the frictional force of the tire and the road surface contact rate, and the frictional force and road surface contact rate can be further increased by adjusting the volume of the protrusions (201a, 203a) and grooves (202a, 204a) or by forming a band (210a).

[0143] The part marked with a dot pattern in Fig. 8 is the location where contact occurs, and interlocking takes place at the above contact location, so the effect of improving the rigidity of the block can be expected.

[0144] In addition, the cross-sectional shape of the protrusions (201a, 203a) and the grooves (202a, 203a) is formed in a trapezoidal shape, which increases the bonding force when interlocking occurs and prevents twisting of the block.

[0145] FIG. 9(a) is a drawing showing the contact area of ​​a block of a first tire with a conventional cut formed therein, and FIG. 9(b) is a drawing showing the contact area of ​​a block (10) of a fourth tire. As seen in FIG. 9, the part marked with a dot pattern is the contact area, and it can be seen that the road surface contact rate of the fourth tire is increased compared to the case of the first tire.

[0146]

[0147] Next, a second embodiment of the present invention will be described.

[0148] FIG. 11 is a perspective view of a blade according to a second embodiment of the present invention, FIG. 12 is a front view and enlarged view of a blade according to a second embodiment of the present invention, and FIG. 13 is a side view of a blade according to a second embodiment of the present invention and a schematic diagram of a cross-section of a cut portion (220).

[0149] FIG. 13 (a) is a side view of the blade, and FIG. 13 (b) and (c) are schematic diagrams of the cross-section of the cut portion (200).

[0150] FIG. 14 is an image related to the shape of the protrusions (201b, 203b) according to the second embodiment of the present invention, FIG. 15 is a front view of the blade regarding the formation of the embossing set according to each embodiment of the present invention, and FIG. 16 is a perspective view of a block (10) in which a cut portion (200) is formed in the second embodiment of the present invention.

[0151] FIG. 17 is a perspective view of a blade according to each embodiment, FIG. 18 is a perspective view showing the contact area between the protrusions (201b, 203b) and the grooves (202b, 204b) according to the second embodiment of the present invention, and FIG. 19 is an image showing the road surface contact area of ​​a block having an incision (200) formed according to each embodiment of the present invention. Here, FIG. 18 may be a simulated shape of the inner wall surface of the incision (200).

[0152] And, FIG. 20 is a graph related to the maximum friction coefficient of a block (10) according to each embodiment of the present invention.

[0153]

[0154] As seen in FIGS. 11 to 13, the blade may include a frame (100) formed in a plate shape, a first convex portion (121b) formed by the other side surface of one part of the frame (100) being indented and the other side surface of one part of the frame (100) being protruded; and a second convex portion (122b) formed by the other side surface of another part of the frame (100) being indented and the other side surface of another part of the frame (100) being protruded.

[0155] As seen in FIG. 13(a), the frame (100) may include an embossing portion (120b), which is an area where a first convex portion (121b) and a second convex portion (122b) are formed in the frame (100); a connecting portion (110), which is formed in a plate shape and extends to one side from the embossing portion (120b); and a blade upper portion (130), which is formed in a plate shape and extends to the other side from the embossing portion (120b). At this time, the connecting portion (110) may be connected to a mold, and the blade upper portion (130) may penetrate into the inside of the tire and be connected to the tire.

[0156] The blade is combined with the vulcanization mold, and during the vulcanization process, the cut portion (200) can be formed long.

[0157] Each of the two wall surfaces of the joint part (110) can be formed in the shape of a continuous surface, the height of the joint part (110) can be formed to be 10% to 50% of the height of the frame (100), and the thickness of the joint part (110) can be formed to be 0.2mm or more.

[0158] As a result, the tire block (10) formed by the blade can have a driving performance on a wet road surface such as snow or rain through the cut portion (200), and can have a drainage effect at the bottom of the tread block (10) on a wet road surface.

[0159] As shown in FIG. 12, the frame (100) can be formed as a flat plate without embossing sections (120b) at both ends in the longitudinal direction of the frame (100). Additionally, a plurality of embossing sections (120b) can be formed spaced apart with a gap to prevent offset interference caused by thickness.

[0160]

[0161] FIG. 14(a) is a front view of the protrusion (201b, 203b), and FIG. 14(b) is a cross-sectional view of the protrusion (201b, 203b), which is a drawing of a cross-section perpendicular to the depth (D) direction of the cut portion (200).

[0162] As seen in FIG. 13 (b) and (c), the protrusions (201b, 203b) and grooves (202b, 204b) are formed by the embossing portion (120b) as described above, and as seen in FIG. 14, the boundary between the protrusions (201b, 203b) and the inner wall surface of the cut portion (200) can be formed in a polygonal shape such as a triangle, square, pentagon, or hexagon.

[0163] Additionally, the cross-sectional shape of the protrusions (201b, 203b) horizontal in the depth (D) direction of the cut portion (200) can be formed as a surface shape formed by connecting a plurality of points spaced apart at equal distances from the midpoint (P0) of the protrusions (201b, 203b).

[0164] That is, P forming an n-gon n inside P m And, an umbrella-shaped protrusion (201b, 203b) in the shape of an n-gon can be formed centered at point P0, which is located h distance vertically from the center of the bottom surface, and if the number of points constituting the bottom surface is odd, the corresponding point can be replaced with any point on the straight line connected to the center point of the side opposite each point.

[0165] Here, the internal space shape of the groove portion (202b, 204b) may be formed to correspond to the shape of the protrusion portion (201b, 203b). At this time, the cross-sectional shape of the groove portion (202b, 204b) may be the cross-sectional shape of the internal space of the groove portion (202b, 204b). The same applies below.

[0166] Accordingly, for each of the grooves (202b, 204b) and protrusions (201b, 203b), the shape of the cross-section perpendicular to the inner wall surface of the cut section (200) and passing through the center point of each of the grooves (202b, 204b) and protrusions (201b, 203b) may have an arc shape. The center point of the grooves (202b, 204b) may be the center point of the internal space shape of the grooves (202b, 204b).

[0167] Ideally, as shown in FIG. 14(a), the boundary (joining surface) between the protrusions (201b, 203b) and the inner wall surface of the cut portion (200) can be formed in a hexagonal shape, and the cross-sectional shape of the protrusions (201b, 203b) can be formed at an equal distance from P1, P2, P3, P4, P5, P6 centered on the midpoint (P0), and the adjacently formed P n Point and P n+1 The distance between points can be formed equally.

[0168] That is, when viewing the stone portion (201b, 203b) from the front, P1 to constituting the bottom surface P6, and P1 centered at point P0, which is located at a vertical distance h from the center of the bottom surface. The first triangle formed by P2, P0, P2 and The second triangle formed by P3, P0, P3 and The third triangle formed by P4, P0, P4 and The fourth triangle formed by P5, P0, P5 and The fifth triangle formed by P6 and P0, P6 and It can be formed by the 6th triangle formed by P1, and the 6 triangles can be combined based on the midpoint.

[0169] As seen in FIG. 14(b), the shape of the cross-section perpendicular to the inner wall surface of the cut portion (200) and passing through the center point of the protrusion (201b, 203b) can be formed in an arc shape.

[0170] At this time, the arc consists of the midpoint (P0) and two points (P) located on a single straight line. n =P i , P n+3 =P j It can be formed as ), and P i and P j It is formed in a direction perpendicular to the straight line formed by and the distance in contact with P0 can be formed as h.

[0171] And, if the number of points constituting the cross-section is odd, it may be possible to substitute the corresponding point with any point on the straight line connecting the center point of the side opposite each point.

[0172] As a result, the cut portion (200) is formed in 3D rather than 2D, so that when the tire is driven, the interlocking of the groove portion (202b, 204b) and the protrusion portion (201b, 203b) is induced, thereby preventing twisting and collapse of the block (10), and as seen in FIG. 14(b), it is formed in a shape having a curved portion to prevent the tire from tearing.

[0173]

[0174] As seen in FIG. 13(a), the other side surface of the frame (100) is indented to form a first convex portion (121b) on one side surface, and the other side surface of the frame (100) is indented to form a second convex portion (122b) on the other side surface.

[0175] And, as seen in FIG. 13(b) and FIG. 13(c), when the blade is combined with the vulcanization die and the tire vulcanization process, the cut portion (200) can be formed by the frame (100).

[0176] The thickness of the joint portion (110), the embossing portion (120b), and the blade upper portion (130) in a direction perpendicular to the length direction of the frame (100) may be partially changed to minimize the reduction of durability, and may be applicable to a part of the embossing portion (120b) or the entire embossing portion (120b).

[0177] The specific shape details regarding the protrusions (201b, 203b) and grooves (202b, 204b) described above are applied as the shape of the recessed space of the convex portions (121b, 122b) described above.

[0178] Likewise, specific shape details regarding the shape of the recessed space of the convex portion (121b, 122b) are applied to the protrusion (201b, 203b) and the groove (202b, 204b). This is the same as above and below.

[0179]

[0180] In a tire having a tread and an incision (200) formed in the tread, the incision (200) includes a groove (202b, 204b) formed by the inner wall surface of the incision (200) being sunken, and a protrusion (201b, 203b) formed by protruding from the inner wall surface of the incision (200), wherein one groove and one protrusion are formed in a shape corresponding to each other and are located adjacent to each other.

[0181] Specifically, protrusions (201b, 203b) and grooves (202b, 204b) may be formed on the inner wall surface of the cut section (200) by convex sections (121b, 122b) having a recessed space formed by the recessing of the frame (100).

[0182] Here, one groove and one protrusion form one embossing set, and each of the multiple embossing sets may be formed spaced apart from each other. Specifically, as seen in FIG. 13 (b) and (c), the first protrusion (201b) and the first groove (202b) may form the first embossing set, and the second protrusion (203b) and the second groove (204b) may form the second embossing set.

[0183] Since one groove and one protrusion are formed with corresponding shapes, one groove in one embossing set can be formed to surround one protrusion.

[0184] At this time, when force is applied to the block (10), the distance between one groove and one protrusion is reduced, and the one groove contacts the protrusion in a shape that surrounds it, thereby increasing the coefficient of friction with the ground and increasing the ground contact rate, and the block (10) is restrained in a direction perpendicular to the road surface to prevent the block (10) from collapsing.

[0185] In particular, in the cross-section of one groove and one protrusion in one embossing set, when one groove and one protrusion formed on both inner sides of the cut portion (200) come into contact, the bonding force can be increased, and twisting of the block (10) can be prevented due to the bonding force of the groove and the protrusion.

[0186] At this time, the shape of the protrusion (201b, 203b) is formed to correspond to the shape of the recessed space of the convex portion (121b, 122b), and the shape of the groove (202b, 204b) can be formed to correspond to the shape of the outer surface of the convex portion (121b, 122b).

[0187]

[0188] FIG. 15(a) shows that a first convex portion (121b) and a second convex portion (122b) with the same volume of recessed space are alternately arranged along one row in the longitudinal direction of the frame (100), and FIG. 15(b) shows that a first convex portion (121b) and a second convex portion (122b) with the same volume of recessed space are alternately arranged along two rows in the longitudinal direction of the frame (100).

[0189] Here, for the shape of the cut portion (200), in the frame (100), a first convex portion (121b) is formed on one side surface of the frame (100) and a second convex portion (122b) is formed on the other side surface of the frame (100), and such first convex portion (121b) and second convex portion (122b) are alternately arranged, and a plurality of first convex portions (121b) and a plurality of second convex portions (122b) may be formed along the length direction of the frame (100).

[0190] In another embodiment, in the frame (100), a first convex portion (121b) may be formed on one side surface of the frame (100) and such first convex portions (121b) may be arranged continuously. Alternatively, a second convex portion (122b) may be formed on the other side surface of the frame (100) and such second convex portions (122b) may be arranged continuously.

[0191] Additionally, FIG. 15(c) shows that a first convex portion (121b) and a second convex portion (122b), with different volumes of recessed spaces, are alternately arranged along two rows in the longitudinal direction of the frame (100).

[0192] And, FIG. 15(d) shows that a first convex portion (121b) and a second convex portion (122b) with different volumes of recessed spaces are alternately arranged along three rows in the longitudinal direction of the frame (100).

[0193] As a specific embodiment, in three adjacent first convex sections (121b), the midpoint of the first convex section (121b) of the first row and the midpoint of the first convex section (121b) of the third row may be spaced apart from a virtual line that passes through the midpoint of the first convex section (121b) of the second row and is parallel to the height direction of the frame (100).

[0194] At this time, the line connecting the midpoint of the first convex part (121b) of the first row and the midpoint of the first convex part (121b) of the third row may be parallel to the height direction of the frame (100) and spaced apart from the virtual line.

[0195]

[0196] In the shape of the cut portion (200) formed by the blades of FIG. 15 (a) to (d), the position of the groove and protrusion of one of the embossing sets and the position of the groove and protrusion of another embossing set are opposite, and one embossing set and another embossing set can be arranged alternately.

[0197] In this case, specifically, a first protrusion (201b) is formed on one inner wall surface of the cut portion (200) and a first groove (202b) is formed on the other inner wall surface of the cut portion (200) to form a first embossing set, and a second protrusion (203b) is formed on the other inner wall surface of the cut portion (200) and a second groove (204b) is formed on one inner wall surface of the cut portion (200) to form a second embossing set.

[0198] And, such first embossing sets and second embossing sets may be arranged alternately, and a plurality of first embossing sets and a plurality of second embossing sets may be formed along the length direction of the cut portion (200).

[0199] As another embodiment, a plurality of embossing sets are formed, and the shape of each of the plurality of embossing sets may be identical.

[0200] In such a case, specifically, a first protrusion (201b) is formed on one inner wall surface of the cut portion (200) and a first groove (202b) is formed on the other inner wall surface of the cut portion (200) to form a first embossing set, and such a first embossing set can be arranged continuously.

[0201] Alternatively, a second protrusion (201b) is formed on the inner wall surface of the other side of the cut portion (200), and a second groove (202b) is formed on the inner wall surface of the other side of the cut portion (200) to form a second embossing set, and such a second embossing set can be arranged continuously.

[0202]

[0203] In the longitudinal direction of the cut portion (100), a plurality of protrusions (201b, 203b) are formed at a predetermined distance apart, and a plurality of corresponding grooves (202b, 204b) are formed. At the same time, the first protrusion (201b) and the second protrusion (203b) may be arranged along the depth (D) direction of the cut portion (200). That is, the plurality of protrusions may be arranged in a manner that forms a matrix.

[0204] At this time, just as in the method of being arranged in the length direction of the incision (200), when arranged in the depth (D) direction of the incision (200), the first protrusion (201b) and the second protrusion (203b) may be arranged alternately, or the first protrusion (201b) or the second protrusion (203b) may be arranged continuously.

[0205] Additionally, when the cut portion (200) is formed using the blade of (c) of FIG. 15, one of the protrusions and another protrusion may be formed with different volumes. That is, the volumes of the first protrusion (201b) and the second protrusion (203b) that are adjacent or spaced apart from each other may be formed differently, and correspondingly, the internal space volumes of the first groove (202b) and the second groove (204b) that are adjacent or spaced apart from each other may be different.

[0206] And, when an incision (200) is formed using the blade of (d) of FIG. 15, the midpoints of each of the other protrusions and the other protrusions adjacent to the one protrusion, which are located in each of the other rows and the other row adjacent to the one protrusion, and the other protrusions are located in each of the other rows and the other row adjacent to the one protrusion, can be spaced apart from the reference line that passes through the midpoint of one protrusion located in one row and is parallel to the depth direction of the incision.

[0207] As a specific embodiment, in a structure in which a plurality of protrusions are arranged in three rows and in each row along the length direction of the cut portion (200), in three adjacent first protrusions (201b), the midpoint of the first protrusion (201b) of the first row and the midpoint of the first protrusion (201b) of the third row may be spaced apart from the reference line, with respect to a reference line that passes through the midpoint of the first protrusion (201b) of the second row and is parallel to the depth direction of the cut portion (200).

[0208] At this time, the line connecting the midpoint of the first protrusion (201b) of the first row and the midpoint of the first protrusion (201b) of the third row may be parallel to the depth direction of the cut portion (200) and spaced apart from the reference line.

[0209]

[0210] The height (H) of the embossing set can be formed to be 80% or less of the depth (D) of the cut portion (200). If the height (H) of the embossing set exceeds 80%, the space between the upper and lower parts of the embossing set in the cut portion (200) of the tire is reduced, and drainage performance, etc., may be significantly reduced.

[0211] The protrusions (201b, 203b) may be provided with a band (210b) formed in a convex shape on a part of the protrusions (201b, 203b). Additionally, the grooves (202b, 204b) may be provided with a band (201b) formed in a convex shape on a part of the grooves (202b, 204b).

[0212] By adjusting the partial thickness of each of the protrusions (201b, 203b) and grooves (202b, 204b) by such a band (210b), the contact rate of the cut portion (200) can be increased and the friction coefficient of the tire can be increased.

[0213] As a result, the friction coefficient and road surface contact rate of the cut section (200) can be increased by considering the formation location of the cut section (200) and the force applied to each location, and the characteristic deviation within the cut section (200) can be equalized by equalizing the characteristics according to the location of the cut section (200).

[0214] To form the band (210b) as described above, the convex portions (121b, 122b) of the blade may further be provided with an auxiliary portion (123b) formed in a concave shape on a part of the outer or inner surface of the convex portions (121b, 122b). Here, the inner surface of the convex portions (121b, 122b) is the surface of the recessed space of the convex portions (121b, 122b).

[0215] Since the band (210b) is formed by the auxiliary part (123b), the details regarding the shape, arrangement, etc. of the band (210b) may be applied to the details regarding the auxiliary part (123b) described below.

[0216] At this time, the auxiliary part (123b) may be formed on a plurality of triangles constituting the umbrella shape of the convex part (121b, 122b), and may be formed on each of one or more triangles according to the road surface contact rate or friction coefficient.

[0217] As a result, when a band (210b) is formed on the cut portion (200) of the tire through a vulcanization process, the shape of the cut portion (200) can be adjusted, and by forming an auxiliary portion (123b) on the convex portion (121b, 122b) considering the formation location of the protrusions (201b, 203b) and the groove portions (202b, 204b) and the force to be applied to each location, the road surface contact rate or frictional force of the cut portion (200) can be adjusted.

[0218] In addition, the characteristic deviation within the cut section (200) can be standardized by standardizing the characteristics according to the shape of the cut section (200). Also, the road surface contact rate and friction coefficient of the cut section (200) formed by the blade can be controlled by adjusting the number of auxiliary sections (123b) formed on the convex sections (121b, 122b).

[0219]

[0220] Hereinafter, test data using tires manufactured using the blades of each embodiment will be described.

[0221] FIG. 17 (a) is a perspective view of a flat blade, which is a general blade of Example 1; FIG. 17 (b) is a perspective view of a blade of Example 2; FIG. 17 (c) is a perspective view of a blade of Example 3, in which a pair of auxiliary parts (123b) are formed on each convex part; and FIG. 17 (d) is a perspective view of a blade of Example 4, in which two pairs of auxiliary parts (123b) are formed on each convex part.

[0222] Here, the tire manufactured by the blade of Example 1 may be called the first tire, the tire manufactured by the blade of Example 2 may be called the second tire, the tire manufactured by the blade of Example 3 may be called the third tire, and the tire manufactured by the blade of Example 4 may be called the fourth tire.

[0223]

[0224] (Table 2. Friction and Road Surface Grip Rate According to Blade Shape)

[0225] As shown in Table 2, the maximum friction of the second tire increased by 3.7% compared to the maximum friction of the first tire, and the road surface grip rate of the second tire increased by 5.5% compared to the road surface grip rate of the first tire.

[0226] In addition, it can be seen that the maximum friction of the third tire increased by 3.1% compared to the maximum friction of the first tire, and the road surface grip rate of the third tire increased by 5.9% compared to the road surface grip rate of the first tire.

[0227] Also, it can be seen that the maximum friction of the fourth tire increased by 5.7% compared to the maximum friction of the first tire, and the road surface grip rate of the fourth tire increased by 9.7% compared to the road surface grip rate of the first tire.

[0228] As a result, when the cut portion (200) is formed by a blade having the shape as described above, it can be seen that the road surface contact rate and maximum friction force increase due to the interlocking of the protrusion and the groove portion within the cut portion (200).

[0229] Additionally, when a pair of bands (210b) are formed on each of the protrusions (201b, 203b) and the grooves (202b, 204b), the maximum road surface contact rate and friction force can be increased, and when two pairs of bands (210b) are formed on each of the protrusions (201b, 203b) and the grooves (202b, 204b), it can be seen that the maximum friction force and road surface contact rate are increased more than when adding a pair of bands (210b).

[0230] As a result, the number of bands (210b) can be adjusted to control the road surface contact rate and maximum friction force, and to prevent twisting of the block (10), thereby preventing a decrease in performance during rescue.

[0231]

[0232] In FIG. 20, Example 1 represents the first tire, Example 2 represents the second tire, Example 3 represents the third tire, and Example 4 represents the fourth tire.

[0233] As shown in Fig. 20, in a graph where the x-axis represents the travel length (sliding length) and the y-axis represents the coefficient of friction, for the first tire, as the travel length increases, the coefficient of friction increases up to about 1 mm, then decreases at 1 mm, and at about 2 mm, the coefficient of friction is maintained at about 0.62.

[0234] In the case of the second and third tires, it can be seen that the coefficient of friction increases as the travel length increases, and then remains at approximately 0.64 at about 2 mm. At this time, it can be seen that the coefficient of friction in Example 2 is slightly higher than that in Example 3.

[0235] In the case of the fourth tire, it can be seen that the coefficient of friction increases as the travel length increases, and then remains at about 0.65 at about 2 mm.

[0236] Interlocking within the cut section (200) can be induced by the protrusions (201b, 203b) and grooves (202b, 204b) to increase the frictional force of the tire and the road surface contact rate, and the frictional force and road surface contact rate can be further increased by adjusting the volume of the protrusions (201b, 203b) and grooves (202b, 204b) or by forming a band (210b).

[0237] The part marked with a dot pattern in Fig. 18 is the location where contact occurs, and interlocking is performed at the above contact location, so the effect of improving the rigidity of the block can be expected.

[0238] In addition, the protrusions and grooves are formed in an umbrella shape, which increases the bonding force when interlocking occurs and prevents twisting of the block.

[0239] FIG. 19(a) is a drawing showing the contact area of ​​a block of a first tire with a conventional cut formed therein, FIG. 19(b) is a drawing showing the contact area of ​​a block (10) of a second tire, and FIG. 19(c) is a drawing showing the contact area of ​​a block (10) of a third tire.

[0240] As shown in Fig. 19, the part marked with a dot pattern is the contact area, and it can be seen that the road surface contact rate increases in the case of the second tire compared to the first tire, and in the case of the third tire compared to the second tire, the road surface contact rate increases even more.

[0241]

[0242] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0243] The scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

[0244]

[0245] (Explanation of symbols)

[0246] 10 : Block

[0247] 11 : Block 1

[0248] 12 : Block 2

[0249] 100 : Frame

[0250] 110 : Joint

[0251] 120a, 120b: Embossing section

[0252] 121a, 121b: First convex portion

[0253] 122a, 122b: Second convex portion

[0254] 123a, 123b : auxiliary parts

[0255] 130 : Upper part of the blade

[0256] 200 : Incision

[0257] 201a, 201b : 1st stone

[0258] 202a, 202b : 1st groove

[0259] 203a, 203b : Second stone

[0260] 204a, 204b : 2nd groove

[0261] 210a, 210b: Band

Claims

1. A tire having a tread and an incision formed in the tread, The above-mentioned incision includes a groove formed by the indentation of the inner wall surface of the incision, and a protrusion formed by protruding from the inner wall surface of the incision. One groove and one protrusion are formed with corresponding shapes and are located adjacent to each other, A tire having an embossed cut portion characterized by the above-mentioned protrusion having an umbrella shape or a cross-section perpendicular to the longitudinal direction of the cut portion being arc-shaped.

2. In Claim 1, The corresponding grooves and protrusions form a single embossing set, and A tire having an incision portion having an embossed shape formed therein, characterized in that each of the plurality of embossing sets is formed spaced apart from one another.

3. In Claim 2, The positions of the groove and the protrusion of one of the aforementioned plurality of embossing sets are opposite to the positions of the groove and the protrusion of another embossing set, and A tire having an incision portion having an embossed shape formed thereon, characterized in that the above-mentioned one embossing set and the above-mentioned other embossing set are arranged alternately with each other.

4. In Claim 2, A tire having an embossed shape formed in a cut portion, characterized in that each of the above plurality of embossing sets has the same shape.

5. In Claim 2, The above-mentioned embossing set is a tire having an incision portion having an embossing shape formed therein, characterized by having a plurality of protrusions and a plurality of grooves.

6. In Claim 2, A tire having an embossed shape formed in an incision, characterized in that the height (H) of the embossing set is formed to be 80% or less of the depth (D) of the incision.

7. In Claim 1, A tire having an embossed cut portion, characterized in that the above-mentioned protrusion has a band formed in a convex shape on a part of the above-mentioned protrusion.

8. In Claim 1, A tire having an embossed cut portion, characterized in that the above-mentioned groove portion has a band formed in a convex shape on one part of the above-mentioned groove portion.

9. In Claim 2, When the above-mentioned protrusion has a shape in which the cross-section perpendicular to the longitudinal direction of the above-mentioned incision is arc-shaped, the above-mentioned groove also has a shape in which the cross-section perpendicular to the longitudinal direction of the above-mentioned incision is arc-shaped, and A tire having an embossed cut portion formed therein, characterized in that, in each of the above-mentioned groove portion and above-mentioned protrusion portion, the cross-sectional shape perpendicular to the depth (D) direction of the cut portion has a trapezoidal shape.

10. In Claim 2, A tire having an embossed cut portion, characterized in that when the above-mentioned protrusion is in the shape of an umbrella, the bonding surface of the above-mentioned protrusion that bonds to the inner wall surface of the above-mentioned cut portion is formed in a polygonal shape.

11. In Claim 10, A tire having an embossed cut portion, wherein the cross-sectional shape of the protrusion horizontal to the depth direction of the cut portion is formed as a surface shape formed by connecting a plurality of points spaced at equal distances from the center point of the protrusion.

12. In Claim 10, A tire having an embossed cut portion formed therein, characterized in that, in each of the groove portion and the protrusion portion, the cross-sectional shape perpendicular to the inner wall surface of the cut portion and passing through the center point of each of the groove portion and the protrusion portion has an arc shape.

13. In claim 10, A tire having an embossed cut section characterized in that one of the multiple protrusions and another protrusion are formed with different volumes.

14. In Claim 10, A tire having an embossed cut portion formed therein, characterized in that, among a plurality of protrusions arranged in a plurality of rows and columns, the midpoints of the other protrusions adjacent to the one protrusion and the other protrusions located in each of the other rows and another rows adjacent to the one protrusion are spaced apart from the reference line parallel to the depth direction of the cut portion, with respect to the reference line passing through the midpoint of one protrusion located in one row.

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