WO2012111773A1

WO2012111773A1 - Pneumatic tire

Info

Publication number: WO2012111773A1
Application number: PCT/JP2012/053708
Authority: WO
Inventors: 聡太郎岩渕
Original assignee: 株式会社ブリヂストン
Priority date: 2011-02-17
Filing date: 2012-02-16
Publication date: 2012-08-23
Also published as: JP6047016B2; JPWO2012111773A1

Abstract

The purpose of the present invention is to improve characteristic properties of a product by means of a design on a tire side.　A pneumatic tire (10) comprises: a decorative part (12) formed on a tire side portion (18); and a design (14) formed in at least one region of the decorative part (12) separately from emblems (32), (34) by patterning a ridge region (20) and a smooth surface region (30) with letters or symbols (36).

Description

Pneumatic tire

The present invention relates to a pneumatic tire.

There has been disclosed a pneumatic tire in which an annular belt having a ridge is provided in a sidewall portion, and a pattern such as a mark with a smooth surface is arranged on a part of the annular belt (see Patent Document 1).

JP 2006-282079 A

However, as in the conventional example described above, the mark arranged on the tire side portion indicates the mark itself, and there is still room for improvement in order to improve the uniqueness of the product.

The present invention has an object to improve the uniqueness of a product by a pattern arranged on the tire side portion in consideration of the above facts.

The first aspect (pneumatic tire) of the present invention includes a decorative portion provided on a tire side portion, and one or more portions provided on the decorative portion separately from a mark, and a character using a ridge region and a smooth surface region. Alternatively, the symbol has a patterned pattern.

In the pneumatic tire according to the first aspect, the pattern formed by patterning characters or symbols using the ridge region and the smooth surface region is provided in the decorative portion of the tire side portion, and the ridge region and the smooth surface region Since the surface roughness is different, the visibility of characters or symbols is improved. Since this pattern is provided separately from the mark, the uniqueness of the product can be further improved.

A second aspect of the present invention is the pneumatic tire according to the first aspect, wherein the character or the symbol is repeatedly arranged in at least one of the tire radial direction and the tire circumferential direction.

In the pneumatic tire according to the second aspect, the visibility of characters or symbols can be further improved. The number of repetitions is preferably 4 or more.

According to a third aspect of the present invention, in the pneumatic tire according to the first aspect or the second aspect, the smooth surface region is continuously in the tire radial direction so as to divide the ridge region in the tire circumferential direction. It is formed.

In the pneumatic tire according to the third aspect, since the smooth surface region in the pattern is formed continuously in the tire radial direction and the ridge region is divided in the tire circumferential direction, the tire circumferential direction component of the smooth surface region The edge of the smooth surface region is less likely to be a core of side cracks. For this reason, the side crack durability in the tire circumferential direction can be improved.

According to a fourth aspect of the present invention, in the pneumatic tire according to any one of the first to third aspects, the ridge region and the smooth surface region can be read as the character or the symbol, respectively.

In the pneumatic tire according to the fourth aspect, since the ridge region and the smooth surface region can be read as characters or symbols, respectively, the uniqueness of the product is more than the configuration in which only one of the ridge region and the smooth surface region can be read. Can be improved.

According to a fifth aspect of the present invention, in the pneumatic tire according to any one of the first to fourth aspects, the character or the symbol is the same as an initial of an applicable product name.

In the pneumatic tire according to the fifth aspect, the character or symbol is the same as the initial letter of the applicable product name and is related to the applicable product name, so that the uniqueness of the product can be appealed from the appearance. .

In a sixth aspect of the present invention (a method for manufacturing a pneumatic tire), a ridge region is formed in a portion for molding a decorative portion of a tire side portion of a mold for tire molding, and a part of the ridge region is formed. By removing and forming a smooth surface region continuous in a direction corresponding to the tire radial direction so that the ridge region is divided in the tire circumferential direction, the decorative portion is patterned with characters or symbols, and the gold A pneumatic tire is molded using a mold.

In the method for manufacturing a pneumatic tire according to the sixth aspect, a smooth surface region that is continuous in the tire radial direction so that a part of the ridge region of the mold is removed and the ridge region is divided in the tire circumferential direction. Since the characters or symbols are patterned by forming the mold, the mold can be easily manufactured. Further, by using the mold for the production of a pneumatic tire, a pneumatic tire having a high product uniqueness can be produced.

As described above, according to the pneumatic tire according to the first aspect, the uniqueness of the product can be improved by the pattern arranged on the tire side portion.

According to the pneumatic tire according to the second aspect, it is possible to obtain an excellent effect that the visibility of characters or symbols can be further improved.

According to the pneumatic tire according to the third aspect, an excellent effect that the side crack durability in the tire circumferential direction can be improved is obtained.

According to the pneumatic tire according to the fourth aspect, it is possible to obtain an excellent effect that the uniqueness of the product can be improved as compared with the configuration in which only one of the ridge region and the smooth surface region can be read.

According to the pneumatic tire according to the fifth aspect, it is possible to obtain an excellent effect that the uniqueness of the product can be appealed from the appearance.

According to the method for manufacturing a pneumatic tire according to the sixth aspect, an excellent effect is obtained that a mold can be easily manufactured and a pneumatic tire having a high product characteristic can be manufactured. It is done.

It is a front view which shows the tire side part of a pneumatic tire. It is an enlarged plan view showing a pattern. It is an enlarged plan view which shows the ridge area | region and smooth surface area | region in a pattern. It is an expansion perspective view which shows the process of removing a part of ridge area | region and forming a smooth surface area | region.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In FIG. 1, a pneumatic tire 10 according to the present embodiment has a decorative portion 12 and a pattern 14 and is attached to a rim 16.

The decorative portion 12 is provided on the tire side portion 18 in a belt shape, for example, along the tire circumferential direction, and has a ridge region 20. The decorative portion 12 is divided into, for example, a plurality of decorative elements 21 to 29 arranged in series clockwise in FIG. The

decorative elements

21, 24, 27 are configured to be long in the tire circumferential direction, and the

decorative elements

22, 23, 25, 26, 28, 29 are configured to be shorter in the tire circumferential direction than the

decorative elements

21, 24, 27. Yes. The

decorative elements

22 and 23 are arranged between the

decorative elements

21 and 24. The

decorative elements

25 and 26 are arranged between the

decorative elements

24 and 27. The

decorative elements

28 and 29 are arranged between the

decorative elements

21 and 27.

The

decorative elements

21, 23, 24, 26, 27, 29 (elements other than the

decorative elements

22, 25, 28) in the decorative portion 12 are mainly constituted by the ridge region 20. Among these, on the inner side of the decorative element 21, a mark 32 of “TURANZA”, which is an example of an applicable product name of the pneumatic tire 10, is displayed using the smooth surface region 30. In addition, a mark 34 of “BRIDGESTONE” indicating the manufacturer is displayed on the inner side of the decorative element 27 using the smooth surface region 30 in the same manner. In addition, other marks, tire sizes, and the like can be displayed on the tire side portion 18. The mark 32 is a part where readability is more important than design. On the other hand, although the decoration part 12 originally gives only an aesthetics, in this embodiment, the uniqueness and image of goods are strongly given to a consumer.

1, one or more patterns 14 are provided on the decorative portion 12 separately from the mark 32. In the present embodiment, the patterns 14 are provided at a total of three locations, for example, the

decorative elements

22, 25, and 28 in the decorative portion 12. Both ends of the pattern 14 in the tire circumferential direction are inclined with respect to the tire radial direction. As shown in FIG. 2, in the pattern 14, characters or symbols 36 are patterned using the ridge region 20 and the smooth surface region 30. This character or symbol 36 is the same as the initial letter “T” of the mark 32 of “TURANZA”, which is an applicable product name. Here, “same” does not require that the font or size is the same, but may be anything that can read the initial letter “T”.

The characters or symbols 36 are displayed on both the ridge region 20 and the smooth surface region 30, and the ridge region 20 and the smooth surface region 30 can be read as the characters or symbols 36, respectively. Two or more characters or symbols 36 are repeatedly arranged in at least one of the tire radial direction and the tire circumferential direction. The number of repetitions is preferably 4 or more. In the present embodiment, the characters or symbols 36 are repeatedly arranged about 4 times in the tire radial direction and about 10 times in the tire circumferential direction. In order to arrange the same character or symbol 36 as “T” in a limited space with high density, the ridge region 20 and the smooth surface region 30 are upside down.

In the pattern 14, the smooth surface region 30 is continuously formed in the tire radial direction so as to divide the ridge region 20 in the tire circumferential direction. In addition, the ridge region 20 is also formed continuously in the tire radial direction so as to divide the smooth surface region 30 in the tire circumferential direction. That is, in the pattern 14, the ridge region 20 and the smooth surface region 30 are formed continuously in the tire radial direction and are alternately arranged in the tire circumferential direction. Here, the “tire radial direction” includes a direction slightly inclined with respect to the tire radial direction.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the pneumatic tire 10 according to this embodiment, a pattern 14 in which characters or symbols 36 are patterned using the ridge region 20 and the smooth surface region 30 is 1 on the decorative portion 12 of the tire side portion 18. Since the surface roughness is different between the ridge region 20 and the smooth surface region 30, the visibility of the characters or symbols 36 is improved. Since the pattern 14 is provided separately from the

marks

32 and 34, the uniqueness of the product can be further improved in addition to the appeal effect of the product by displaying the

marks

32 and 34.

Specifically, the character or symbol 36 is the same as the initial letter “T” of the mark 32 of “TURANZA”, which is the applicable product name, and is associated with the applicable product name. You can appeal from the appearance. Furthermore, since two or more characters or symbols 36 are repeatedly arranged in at least one of the tire radial direction and the tire circumferential direction, the visibility of the characters or symbols 36 is further improved.

Further, since the ridge region 20 and the smooth surface region 30 can be read as characters or symbols 36, respectively, the uniqueness of the product can be improved as compared with the configuration in which only one of the ridge region 20 and the smooth surface region 30 can be read. it can.

In order to improve the uniqueness of the product, when the pattern of the tire side portion is expanded in the tire circumferential direction, generally, the end portion of the smooth surface constituting the pattern or the like is likely to become the core of the side crack. . In that respect, in the present embodiment, the smooth surface region 30 in the pattern 14 is formed continuously in the tire radial direction, and the ridge region 20 is divided in the tire circumferential direction, so the tire circumferential direction of the smooth surface region 30 is There are few components and the edge part of this smooth surface area | region 30 does not become easily the nucleus of a side crack. For this reason, the side crack durability in the tire circumferential direction can be improved.

Here, as shown in FIG. 3, in the ridge region 20, the width of the vertical bar portion of the letter “T” in the tire circumferential direction is a, and the tire where the letter “T” continues in the tire radial direction The width in the circumferential direction is b, and the offset amount in the horizontal bar direction of the letter “T” at the same part is c. On the other hand, in the smooth surface region 30, the width in the tire circumferential direction of the portion where the letter “T” continues in the tire radial direction is defined as d.

In the present embodiment, the difference between the width a and the width b is large. Further, in the letter “T” that is continuous in the tire radial direction, a portion having a width b is a constricted portion. Thereby, while improving the independence of each character, generation | occurrence | production of a side crack can be suppressed. Furthermore, the independence of characters can also be increased by the offset amount c.

In the present embodiment, the width b in the ridge region 20 is equal to the width d in the smooth surface region 30. In the decorative element 28, the ridge region 20 is located lower than the smooth surface region 30. Therefore, in the tire molding die for molding the decorative element 28, it is necessary to cut a portion corresponding to the smooth surface region 30 deeper than a portion corresponding to the ridge region 20. At that time, by making the width b in the ridge region 20 and the width d in the smooth surface region 30 equal, the tool diameters used for the die processing can be made uniform, and the manufacture becomes easy. In addition, both the ridge region 20 and the smooth surface region 30 are visible as the letter “T” or symbol 36, respectively.

(Other embodiments)
The configurations of the decorative elements 21 to 29 in the decorative portion 12 are not limited to those described and illustrated above. Moreover, although the character or symbol 36 is the same as the initial letter “T” of the mark 32 of “TURANZA” which is an applicable product name, the present invention is not limited to this, for example, the mark 34 of “BRIDGESTONE” indicating the manufacturer. The initial letter “B” or other letters or symbols may be used.

The smooth surface region 30 is formed continuously in the tire radial direction so as to divide the ridge region 20 in the tire circumferential direction. However, the present invention is not limited to this. For example, the smooth surface region 30 is formed in the ridge region 20. It may be scattered. In relation to this, the ridge region 20 and the smooth surface region 30 are readable as characters or symbols 36, respectively. For example, the ridge region 20 and the smooth surface region 30 can be read as characters or symbols 36. The region 20 may be configured so as not to be readable as the character or symbol 36.

(Pneumatic tire manufacturing method)
In FIG. 4, the manufacturing method of the pneumatic tire according to the present embodiment forms a ridge region 120 in a portion of the tire molding die 40 where the decorative portion 14 (FIG. 1) of the tire side portion is molded, A part of the ridge region 120 is removed to form a smooth surface region 130 that continues in a direction corresponding to the tire radial direction so that the ridge region 120 is divided in the tire circumferential direction. 136 is patterned and a pneumatic tire is molded using the mold 40.

In this pneumatic tire manufacturing method, a part of the ridge area 120 of the mold 40 is removed to form the smooth surface area 130, whereby the characters or symbols 136 are patterned. Can be manufactured. Specifically, when the smooth surface region 130 is formed, for example, a part of the ridge region 120 is cut using a tool 42 such as an end mill. At this time, by making the diameter of the tool 42 correspond to the width d (FIG. 3), the letter “T” or the symbol 136 can be continuously formed in the direction corresponding to the tire radial direction. The machining time can be shortened as compared with the case where the letter “T” or the symbol 136 is independent. The process for removing a part of the ridge region 120 is not limited to cutting, and electric discharge machining or the like can also be used.

Further, by using this mold 40 for manufacturing a pneumatic tire, it is possible to manufacture the pneumatic tire 10 (FIG. 1) having a high product uniqueness. The ridge region 120 (FIG. 3) of the pattern 14 can be molded by the ridge region 120 of the mold 40, and the smooth surface region 30 (FIG. 3) of the pattern 14 can be molded by the smooth surface region 130 of the mold 40.

(Explanation of symbols)
DESCRIPTION OF SYMBOLS 10 Pneumatic tire 12 Decoration part 14 Pattern 18 Tire side part 20 Ridge area 30 Smooth surface area 32 Mark 34 Mark 36 Character or symbol

Claims

A decorative part provided on the tire side part;
In the decorative portion, one or more locations are provided separately from the mark, and a pattern in which characters or symbols are patterned using a ridge region and a smooth surface region,
Pneumatic tire having
2. The pneumatic tire according to claim 1, wherein two or more of the letters or the symbols are repeatedly arranged in at least one of a tire radial direction and a tire circumferential direction.
The pneumatic tire according to claim 1 or 2, wherein the smooth surface region is formed continuously in a tire radial direction so as to divide the ridge region in a tire circumferential direction.
The pneumatic tire according to any one of claims 1 to 3, wherein the ridge region and the smooth surface region are readable as the character or the symbol, respectively.
The pneumatic tire according to any one of claims 1 to 4, wherein the character or the symbol is the same as an initial of an applicable product name.
A ridge region is formed in a portion for molding a decorative portion of a tire side portion of a mold for molding a tire, and a part of the ridge region is removed so that the ridge region is divided in the tire circumferential direction. By forming a smooth surface region that continues in the direction corresponding to the tire radial direction, pattern the letters or symbols on the decorative portion,
A method for manufacturing a pneumatic tire, wherein a pneumatic tire is molded using the mold.