JP2003182317A - Tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emblem, which can prevent the occurrence of a crack and enhance the removability of dirt, and create a great contrast between the emblem and other conventional emblem in their visibility. <P>SOLUTION: Thin grooves 6 are formed in a row on the surface 2S of the side wall of a tire to form a decorative part 4 comprising serrations 3 formed with ridges 7 rising up between each thin groove 6. In the decorative part 4, display grooves 9, whose depth is different from the depth ha of the thin grooves 6, are formed in the part of thin grooves 6 that shapes the emblem 5B or covers the outline of it, so that an emblem display part 10 is formed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire having a serration pattern decoration formed by arranging narrow grooves in parallel on a sidewall surface, and providing display groove portions having different depths in the narrow grooves. The present invention relates to a tire having a mark displayed by the display groove.

[0002]

2. Description of the Related Art As shown in FIGS. 7 (A) and 7 (B), on the surface of a sidewall of a tire, a mark a composed of characters, numbers, figures, etc. is visually recognized. In order to improve the property, a strip-shaped decorative portion e made of serrations formed by ridge-shaped bodies c that are formed by arranging the narrow grooves b in parallel is generally used as the background of the mark a. A high rib element a1 which is formed and projects the mark a toward the outside of the tire more than the ridge c.
And the surface of the rib element a1 is formed into a smooth surface or a serration pattern different from that of the decorative portion e.

However, the side wall is one of the parts that is most likely to be bent and deformed during running, and therefore, when the conventional mark a composed of the rib element a1 is often used, the mark surface is cracked due to bending fatigue. Etc. are likely to occur, leading to a decrease in appearance and durability. In addition, since the bag-shaped portion d surrounded by the high rib element a1 is formed in the mark a, the mud-repelling property is deteriorated and stains are difficult to remove.

On the tire, as a mark a to be displayed,
In addition to trademarks and maker names, there are many that are obligatory based on the standard, but all of these are rib elements a1.
When it is formed by, it is difficult to give great strength and weakness to the visibility, and the appearance becomes cluttered as a whole, so that the visibility to the mark to be emphasized most tends to decrease.

Therefore, the present invention is based on the fact that the display groove portions having different depths are provided in the narrow grooves between the ridge-shaped portions along the mark or the contour thereof, and cracks or the like are generated. It is an object of the present invention to provide a tire that can prevent the above-mentioned phenomenon and enhance the mud-repelling property, and can impart a great strength and weakness to the visibility with other conventional marks.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 of the present application relates to a ridge-like body which is formed by arranging fine grooves in parallel on a sidewall surface of a tire so as to rise between the fine grooves. The decorative portion is formed of serrations and extends in the circumferential direction, and the decorative portion is
By forming display groove portions having different depths in the narrow groove along the mark displayed on the surface of the sidewall or the contour thereof, a mark display portion for displaying the mark is formed. It is characterized by having done.

Further, in the invention of claim 2, the display groove portion is
It is characterized by being shallower than the narrow groove.

Further, the invention of claim 3 is characterized in that the ridge-like body is formed along the contour of the mark to provide a discontinuity portion for emphasizing the mark.

Further, in the invention of claim 4, the decorative portion displays the convex mark by providing a rib element protruding from the surface of the sidewall along a convex mark different from the mark. The feature is that a convex mark display section made of non-serration is formed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below.
This will be described together with the illustrated example. FIG. 1 is a side view showing a sidewall of a tire of the present invention. In FIG. 1, a tire 1 is provided with a decorative portion 4 made of serrations 3 and a mark 5 made of, for example, letters, numbers, figures, etc. formed on the sidewall surface 2S with the decorative portion 4 as a background. There is.

The decorative portion 4 is a belt-like member extending in the circumferential direction around the tire axis, and in this example, a ring-shaped member extending continuously over the entire circumference of the tire is shown as an example. It may have a circular arc shape that is arranged in a part or a plurality of parts.

Further, the serration 3 forming the decorative portion 4 is
As shown in the enlarged view of the cross section in FIG. 2, by forming the narrow grooves 6 in parallel on the sidewall surface 2S, a ridge-shaped body 7 that rises between the narrow grooves 6 is formed. Although various conventional cross-sectional shapes can be used as the ridge-shaped body 7, as in the present example, a triangular cross-section with an apex angle α of, for example, about 90 °, or a trapezoidal cross-section with its apex chamfered. What is preferable can be used. Since the ridge-shaped body 7 is formed as a land portion between the narrow grooves 6 provided in the sidewall surface 2S as described above, the virtual surface connecting the tops of the ridge-shaped bodies 7 is The surface is substantially the same as the sidewall surface 2S.

The ridge-shaped body 7 is, as shown in FIG.
The serrations 3 are arranged at a constant angle θ with respect to the radial line R of the tire, thereby forming the serrations 3 having vertical stripe patterns substantially parallel to the adjacent ridge-shaped bodies 7.

At this time, the ridge-like bodies 7 are preferably arranged at a constant pitch interval P, and the pitch interval P at the radially inner edge position 4a of the decorative portion 4 is the mark 5.
From the viewpoint of visibility, the range of 0.6 to 1.5 mm is preferable. The angle θ of the ridge-shaped body 7 is 0 ± 45 °
The range of (−45 ° to + 45 °) is preferable, and if it exceeds this range, the ridge-shaped body 7 is excessively inclined, which makes it difficult to cut into a mold, and the inner and outer edges of the decorative portion 4 in the radial direction. Between them, the difference in the pitch interval P becomes large, which is disadvantageous to the visibility of the mark 5. In this example, the angle θ is approximately 20 °.
Is illustrated.

Next, in the present embodiment, as shown in FIGS. 2 and 4, a display groove portion 9 having a depth ha different from the depth ha of the fine groove 6 is formed in the fine groove 6 along the mark 5 or its contour. By providing the mark 5, the display groove portion 9 forms the mark display portion 10 for displaying the mark 5.

In this example, the mark 5 is shown in FIG.
, For which strong visibility is required, such as "DPNLG
The first mark 5A composed of character strings such as "R" and "UOASPC", and the visibility that is weaker than that of the first mark 5A is required, for example, "STUDLESS", "265 / 70R
The second mark 5B including a character string such as "16" is included in the example. And in this example, the second of these
The mark 5B of FIG.
Are displayed by.

It is advantageous to form the display groove portion 9 as a shallow bottom portion having a depth hb smaller than the depth ha of the narrow groove 6 in order to keep the pitch interval P constant, It is also preferable from the viewpoint of tire durability. The depth hb of the display groove portion 9 is 30 times the depth ha of the narrow groove.
The range of up to 70% is preferable for ensuring visibility.

Further, as shown in FIG. 4, it is possible to form the groove bottom of the display groove 9 with a flat surface and to make the groove bottom of the ridge 7 not have a flat bottom. Effective to improve.

Further, in this example, the display groove portion 9 is provided along the second mark 5B, so that the mark display portion 1 is formed.
0 represents the appearance in which the entire mark is raised from the groove bottom of the narrow groove 6. The display groove portion 9 may be formed in a contour line shape along the contour of the second mark 5B. In such a case, the mark display portion 10 may display the mark 5B in a bag character shape. .

However, in any case, the mark display unit 10
Has an outer surface covered with serrations having the same pattern and the same height as the decorative portion 4. Therefore, although the visibility is weak, depending on the viewing angle, the mark 5B appears and is lost, and the appearance changes to a hidden character.
It can give a strong impression to the viewer.

Since the display groove 9 is lower than the top of the ridge-shaped body 7, cracks do not occur in the mark 5B due to bending fatigue, and the appearance and durability can be prevented from being deteriorated.
In addition, a conventional bag-shaped portion d (shown in FIG. 7 (A)) is placed inside the mark 5B.
Since it does not have dirt, it has good mud-repelling properties and stains can be easily removed.

As shown in FIG. 5, the mark display unit 10
In order to increase the visibility, the ridge-shaped body 7
Further, it is possible to provide a discontinuity portion 11 which emphasizes the mark 5B by being formed along the contour of the mark 5B.

If desired, the narrow groove 6 may be further provided with
A sub-marker is displayed by forming a sub-marker groove (not shown) having a depth different from that of the fine groove 6 and the mark groove portion 9 along a sub-marker different from the mark 5B or its contour line. It is also possible to form a sub-marker display portion that is used. At this time, the sub-display groove portion can be formed in the display groove portion 9, and in this case, another sub-marker will be displayed in the mark 5B.

Next, the first mark 5A is displayed by the rib element 12 protruding from the sidewall surface 2S, as shown in FIG. 6, as in the conventional case. That is, by forming the rib element 12 along the mark 5A, the convex mark display portion 14 for displaying the mark 5A as the convex mark 13 is formed. At this time, it is preferable that the mark 5A (convex mark 13) is non-serrated by forming the rib element 12 with a smooth surface. As a result, the visibility between the marks 5A and 5B is greatly enhanced, and the first mark 5A, which requires strong visibility, can be further emphasized. As shown by the alternate long and short dash line in FIG. 6, serrations 15 having a pattern different from that of the serrations 3 may be formed on the surface of the mark 5A (convex mark 13) as required.

Although a particularly preferred embodiment of the present invention has been described above in detail, the present invention is not limited to the illustrated embodiment and can be modified into various modes.

[0026]

As described above, according to the present invention, the display groove portions having different depths are provided in the narrow groove between the ridge-shaped portions forming the decorative portion along the mark or the contour thereof. , Thereby forming the mark display portion. Therefore, the occurrence of cracks and the like can be prevented, and the mud repellency can be improved.

In addition, it is possible to give a large degree of visibility to other conventional marks, and it is possible to perform an orderly design design with a high degree of freedom, and the mark that is most emphasized. Visibility can be improved. Further, the appearance of the mark display portion changes in a hidden character shape depending on the viewing angle, so that the mark display portion is rich in unexpectedness and can give a strong impression to the viewer.

[Brief description of drawings]

FIG. 1 is a side view showing a sidewall of a tire according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing serrations along with narrow grooves and ridges.

FIG. 3 is a side view illustrating an array of ridge-shaped bodies.

FIG. 4 is a perspective view conceptually showing a formation state of a mark display portion by a display groove portion.

FIG. 5 is a perspective view conceptually showing another example of the mark display portion.

FIG. 6 is a sectional view conceptually showing a formation state of a convex mark display portion by the rib element 12.

7 (A) and (B) are a side view and a perspective view for explaining a mark of a conventional tire.

[Explanation of symbols]

1 tire 2S Sidewall surface 3 serrations 4 decoration 5B mark 6 narrow groove 7 Ridge 9 Display groove 10 Mark display 11 breaks 12 rib elements 13 convex mark 14 Convex mark display

Claims (4)

[Claims] 1. A decorative portion extending in the circumferential direction, which is made of serrations formed from ridge-shaped bodies standing between the narrow grooves by arranging the narrow grooves in parallel on the sidewall surface of a tire, and the decoration. The part is provided with a display groove portion in which the depth of the narrow groove is different, along the mark displayed on the surface of the sidewall or the contour thereof, thereby displaying the mark. A tire having a formed part. 2. The tire according to claim 1, wherein the display groove portion is shallower than the narrow groove. 3. The tire according to claim 1, wherein the ridge-shaped body is provided along a contour of the mark to provide a discontinuity portion which emphasizes the mark. 4. The convex mark made of non-serration for displaying the convex mark, wherein the decorative portion is provided with a rib element protruding from the surface of the sidewall along a convex mark different from the mark. The tire according to any one of claims 1 to 3, wherein a chapter display portion is formed.