JP2006224704A - Pneumatic tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the visibility of characters regardless of a radiation condition of peripheral lights or a rotation angle of a tire without deterioration of crack resistance at a character end or increase of a tire weight in a pneumatic tire having characters projected on the surface of a side wall part. <P>SOLUTION: A character (here, numeral "5") comprises combination of trapezoidal projecting parts seen from a plane view. A projecting end of the surface of each projecting part is tapered (here, triangle or trapezoidal sectional shape), and is provided with two or more different finished faces (such as knurl-finishing with different pattern directions, and satin-finishing with different pattern sizes). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pneumatic tire in which characters (including numbers) representing a manufacturer name, a product name, a tire size, and the like are provided in a convex shape on the surface of a sidewall portion, and in particular, the visibility of those characters is improved. Related to pneumatic tires.

  Generally, on the surface of a sidewall portion of a pneumatic tire, letters representing the tire manufacturer name, product name, size, and the like are provided in a convex shape. In order to appeal these manufacturer names, product names, etc. accurately, it is desirable that the visibility of these characters be high.

  Conventionally, as a pneumatic tire in which the visibility of these characters is improved, as shown in a cross section in FIG. 4, the character 101 is divided into an edge portion 102 constituting the outer edge thereof, and an inner portion of the edge portion 102. There is a pneumatic tire which is located at the center of the character and is a raised character composed of a groove 103 formed in a concave shape from the edge 102 (see Patent Document 1).

Further, in order to improve the visibility of the character, as shown in FIGS. 5A and 5B, the character 201 has a pair of tapered surfaces 203 extending at an acute angle L with respect to the sidewall portion 210. There is a pneumatic tire provided with a foot portion 202 having a shape (see Patent Document 2). Here, FIG.5 (b) is CC sectional drawing of Fig.5 (a). In addition, the shape of the end surface 204 of the foot 202 is a triangle.
JP-A-10-67208 JP-A-6-340208

  However, the pneumatic tire described in Patent Document 1 includes a portion that reflects light and a portion that becomes a shadow due to a difference in protrusion height Tt between the edge portion 102 and the groove portion 103 from the sidewall portion surface 104. Therefore, in order to improve the visibility, it is necessary to increase the height of the edge portion 102 or to enlarge the character 101. For this reason, there exists a possibility that a tire weight may increase or the crack resistance of a character end may fall. For tires with a small flatness, the size of the characters is limited because the dimensions of the sidewalls in the tire axial direction are small.

  Further, in the pneumatic tire described in Patent Document 2, since the pair of surfaces 203 constituting the foot portion 202 have the same finished surface, it is visually recognized depending on the irradiation state of ambient light and the rotation angle of the tire. May not be sufficient.

  The present invention has been made in order to solve such problems, and the object thereof is to improve the crack resistance of the character end in a pneumatic tire having a character provided in a convex shape on the surface of the sidewall portion. It is to increase the visibility of characters without deterioration and increase in tire weight, and irrespective of ambient light irradiation state and tire rotation angle.

The invention according to claim 1 is the pneumatic tire having a character provided in a convex shape on the surface of the sidewall portion, wherein the surface of the convex portion constituting the character is formed by a plurality of flat surfaces with a tapered tip. And a plurality of finished surfaces having different patterns or roughnesses.
The invention according to claim 2 is the pneumatic tire according to claim 1, wherein the character is composed of one or a plurality of convex portions which are polygons having two parallel sides in plan view, The surface of the convex portion is a pneumatic tire characterized in that a protruding end is tapered by a plurality of flat surfaces, and each convex portion has a plurality of finished surfaces having different patterns or roughnesses.
The invention according to claim 3 is the pneumatic tire according to claim 1, characterized in that a finished surface having the same pattern or roughness is arranged along a side edge of the character. .
The invention according to claim 4 is the pneumatic tire according to claim 1, wherein the convex portion has a pedestal on the surface side of the sidewall portion, and the shape of the pedestal is a rectangular parallelepiped. It is a pneumatic tire.
The invention according to claim 5 is the pneumatic tire according to claim 1, wherein a plane having a finished surface different from the finished surface of the tapered flat surface is formed at the tapered protruding end. This is a tire.
The invention according to claim 6 is the pneumatic tire according to claim 1, wherein the height of the convex portion is not less than 0.4 mm and not more than 4.0 mm.
The invention according to claim 7 is the pneumatic tire according to claim 4, wherein the height of the pedestal is 0.4 mm or less.

(Function)
According to the first, second, and sixth aspects of the invention, light and dark are generated by the difference in the light reflection state based on the difference in the finished surfaces of the plurality of tapered surfaces, and the visibility is improved.
According to the invention of claim 3, light and dark are generated along the side edge of the character due to the difference in the light reflection state based on the difference between the finished surface arranged along the side edge of the character and the other finished surface. And improve visibility.
According to the invention which concerns on Claims 4 and 7, brightness and darkness are produced | generated by the difference in the reflective state of the light based on the difference in direction of the surface of a base part, and the flat surface formed in a taper, and visibility is improved.
According to the invention which concerns on Claim 5, light and dark are produced | generated by the difference in the reflective state based on the difference in the finishing surface of the plane formed in the taper, and the plane of the tip, and visibility is improved.

  According to the present invention, the brightness of the tapered portion of the convex portion constituting the straight line of the character does not cause deterioration of the crack resistance of the character end and increase of the tire weight, and the irradiation state of the surrounding light and the tire Character visibility can be improved regardless of the rotation angle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the direction perpendicular to the outside from the surface of the sidewall portion of the tire is defined as the upper direction.
[First Embodiment]
FIG. 1 is a diagram showing a basic configuration of convex characters formed on a sidewall portion of a pneumatic tire according to the first embodiment of the present invention. Here, (a) is a plan view, that is, a view seen from above the sidewall portion, (b) is a cross-sectional view taken along line AA in (a) when the convex character does not have a pedestal, and (c) is convex. It is AA sectional drawing in (a) in case a character has a base. Here, although the convex character is formed on the annular band 10 having the ridge formed on the surface of the sidewall portion, it may be formed directly on the surface of the sidewall portion.

  As shown in FIG. 1A, the convex character 1 is the number “5”, and is formed by connecting seven convex portions 2 to 8. Each convex part 2 thru | or 8 is trapezoid in planar view. Each convex part 2 thru | or 8 has a pair of plane 2A, 2B thru | or 8A, 8B which comprises each side surface. Further, the convex portions 2 and 8 at both ends of the character have planes 2C and 8C constituting the end portions, respectively.

  As shown in FIG. 1B, the planes 2A and 2B constituting the convex portion 2 have a triangular AA cross section cut along a plane orthogonal to the extending direction. The height X of the triangle is preferably 0.4 mm or more and 4.0 mm or less. This is because if it is higher than 4.0 mm, the weight of the tire increases, and if it is lower than 0.4 mm, the visibility of the characters is lowered. The same applies to the convex portions 3 to 8.

  In addition, as shown in FIG. 1C, when the pedestal 2D is provided below the side surfaces 2A and 2B constituting the convex portion 2 (on the annular band 10 side), the cross-sectional shape is rectangular (the solid shape is a rectangular parallelepiped). Is preferred. The height Y of the base 2D is preferably 0.4 mm or less. This is because if it is higher than 0.4 mm, the tire weight increases. In this case, the sum of the height Y of the pedestal 2D and the height of the triangle is X, and it is preferable that it be 0.4 mm or more and 4.0 mm or less. The same applies to the convex portions 3 to 8.

  Further, as shown in an embodiment (FIG. 3) to be described later, the side surfaces 2A, 2B to 8A, 8B constituting the convex portions 2 to 8 in FIG. (Or surface roughness, etc.) to create a finished surface that makes the light reflected differently and generates light and dark to improve the visibility of characters regardless of the ambient light irradiation state and tire rotation angle. Configured to enhance.

[Second Embodiment]
FIG. 2 is a diagram showing a basic configuration of convex characters formed on the sidewall portion of the pneumatic tire according to the first embodiment of the present invention. Here, (a) is a plan view, (b) is a BB sectional view in (a) when the convex character does not have a pedestal, and (c) is (a) when the convex character has a pedestal. It is BB sectional drawing in. Here, although the convex character is formed on the annular band 20 having the ridge formed on the surface of the sidewall portion, it may be formed directly on the surface of the sidewall portion.

  As shown in FIG. 2A, the character 11 is the number “5”, and is formed by connecting seven convex portions 12 to 18. Each convex part 12 thru | or 18 has a pair of plane 12A, 12B thru | or 18A, 18B which comprises each side surface. Furthermore, the convex portions 12 and 18 at both ends of the character have planes 12C and 18C that constitute the end portions, respectively. Further, one continuous plane (hereinafter referred to as the upper surface) 19 is formed at the upper ends of the convex portions 12 to 18. The lower edges of the side surfaces 12A, 12B to 18A, 18B of the convex portions 12 to 18 are parallel to each other.

  As shown in FIG. 2B, the planes 12A and 12B constituting the convex portion 12 are trapezoidal in the shape of the BB section cut along the plane orthogonal to the extending direction. That is, it can be said that the shape of the character 11 is a shape in which the vicinity of the upper ends of the side surfaces 2A, 2B to 8A, 8B of the character 1 shown in FIG. The trapezoid height X is preferably 0.4 mm or more and 4.0 mm or less. The same applies to the convex portions 13 to 18.

  In addition, as shown in FIG. 2C, when the pedestal 12D is provided below the side surfaces 12A and 12B constituting the convex portion 12 (on the annular belt 20 side), the cross-sectional shape is rectangular (the solid shape is a rectangular parallelepiped). Is preferred. The height Y of the pedestal 12D is preferably 0.4 mm or less. In this case, the sum of the height Y of the pedestal 12D and the height of the trapezoid is X, and it is preferable that it be 0.4 mm or more and 4.0 mm or less. The same applies to the convex portions 13 to 18.

  Further, as shown in an embodiment (FIG. 3) described later, the side surfaces 12A, 12B to 18A, 18B and the upper surface 19 constituting the convex portions 12 to 18 in FIG. By forming two or more different types of finished surfaces (pattern or surface roughness, etc.), the light reflection state is made different, and light and dark are generated, so that the ambient light irradiation state and the tire rotation angle can be adjusted. Regardless, it is configured to improve the visibility of characters.

[Example]
Examples of the present invention are shown in FIGS. Here, (a) and (b) correspond to the first embodiment, and (c) and (d) correspond to the second embodiment.

  In FIG. 3A, the finished surfaces of the side surfaces 2A to 8A of the convex portions 2 to 8 that are continuous along the side edge on one side of the character constituting the number “5” are knurled with an upward left oblique line. The finished surfaces of the side surfaces 2B to 8B on the opposite side of the side surfaces 2A to 8A were knurled with an upwardly rising oblique line. The surfaces 2C and 8C at both ends of the character are not processed. In the case of this character, because the processing state of both side surfaces of each convex part is different, light and dark along the side edge of the character is formed, so compared with the case where the finished surface of each convex part is the same, Regardless of the irradiation state of ambient light and the rotation angle of the tire, the visibility of the characters increases.

  Further, in FIG. 3B, the finished surfaces of the side surfaces 2A to 8A that are continuous along the side edge on one side of the characters constituting the number “5” are finished with a satin finish. Further, the side surfaces 2B to 8B, that is, the side surface opposite to the side surface subjected to the satin processing is not processed. Further, the surfaces 2C and 8C at both ends of the character are not processed. In the case of this character as well, since the processing state of both side surfaces of each convex portion is different, light and dark along the side edge of the character is formed, so compared with the case where the finished surface of each convex portion is the same The visibility of characters increases regardless of the ambient light irradiation state and the rotation angle of the tire. In this figure, the side surfaces 12B to 18B may be made into a satin finish having a surface roughness different from that of the side faces 12A to 18A.

  In FIG. 3 (c), the finished surfaces of the side faces 12A to 18A and 12B to 18B, and the faces 12C and 18C at both ends of the character, that is, the contour surface of the character constituting the number "5" are knurls having a right-upward oblique line. Processing. The upper surface 19 is not processed. In the case of this character, since the processing state of the contour surface and the upper surface of each convex portion is different, light and dark along the contour of the character is formed, so compared with the case where the finishing surface of each convex portion is the same. Thus, the visibility of the characters is increased regardless of the ambient light irradiation state and the rotation angle of the tire. In this figure, the direction of the knurled eyes on the side surfaces 12A to 18A and the direction of the knurled eyes on the side surfaces 12B to 18B may be reversed.

  In FIG. 3D, the side surfaces 12A to 18A and 12B to 18B, and the surfaces 12C and 18C at both ends of the character, that is, the contour surface of the character constituting the number “5” are not processed. On the other hand, the upper surface 19 was given a satin finish. Also in the case of this character, since the processing state of the contour surface and the upper surface of each convex portion is different, light and dark along the contour of the character is formed, so compared with the case where the finishing surface of each convex portion is the same. Thus, the visibility of the characters is increased regardless of the ambient light irradiation state and the rotation angle of the tire.

It is a figure which shows the basic composition of the convex-shaped character of the pneumatic tire which concerns on the 1st Embodiment of this invention. It is a figure which shows the basic composition of the convex character of the pneumatic tire which concerns on the 2nd Embodiment of this invention. It is a top view which shows the structure of the convex-shaped character of the pneumatic tire which concerns on the Example of this invention. It is sectional drawing which shows the structure of an example of the convex-shaped character of the conventional pneumatic tire. It is the top view and sectional drawing which show the structure of another example of the convex-shaped character of the conventional pneumatic tire.

Explanation of symbols

  1,11 ... convex character, 2-8, 12-18 ... convex part, 2A-8A, 2B-8B, 12A-18A, 12B-18B ... side face, 2C, 8C, 12C, 18C ... end face, 2D, 12D ... pedestal, 19 ... upper surface.

Claims (7)

In the pneumatic tire having letters provided in a convex shape on the surface of the sidewall portion,
The surface of the convex part which comprises the said character is a pneumatic tire characterized by having a plurality of finished surfaces where the tips are tapered by a plurality of planes and having different patterns or roughnesses. The pneumatic tire according to claim 1,
The character is composed of one or a plurality of convex portions that are polygons having two parallel sides in a plan view, and each of the convex portions has a plurality of finished surfaces having different patterns or roughnesses. A pneumatic tire characterized by that. The pneumatic tire according to claim 1,
A pneumatic tire characterized in that a finished surface having the same pattern or roughness is disposed along a side edge of the character.   The said convex-shaped part has a base on the surface side of the said sidewall part, The shape of this base is a rectangular parallelepiped, The pneumatic tire characterized by the above-mentioned. The pneumatic tire according to claim 1,
A pneumatic tire characterized in that a flat surface having a finished surface different from the finished surface of the tapered flat surface is formed at the tapered protruding end. The pneumatic tire according to claim 1,
The pneumatic tire according to claim 1, wherein a height of the convex portion is 0.4 mm or more and 4.0 mm or less. In the pneumatic tire according to claim 3,
A pneumatic tire characterized in that the height of the pedestal is 0.4 mm or less.

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