JP2004352035A - Pneumatic tire and tire abnormal deformation notifying utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pneumatic tire and a tire abnormal deformation notifying utensil which can notify people other than passengers of the occurrence of an abnormal deformation of the tire due to the reduction or the like of the air pressure during parking and traveling. <P>SOLUTION: This tire abnormal deformation notifying utensil 10 which is equipped with at least a pair of counter fins 12 and 13 is provided on the external surface 9 of the side wall section 2. A pair of the fins 12 and 13 of the tire abnormal deformation notifying utensil 10 can be spread by the warping of the side wall section 2 at the times of an air pressure reduction or an overloading. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pneumatic tire and a tire abnormal deformation alerting device, and more particularly, to a pneumatic tire and a tire capable of notifying that a tire has abnormally deformed due to a decrease in air pressure besides an occupant when the vehicle is stopped or running. It relates to an abnormal deformation alarm.
[0002]
[Prior art]
If the tire is running in a state where the tire is abnormally deformed due to a decrease in air pressure or the like, the tire may break down, leading to a further serious accident. Therefore, in recent years, in order to ensure safe driving, a device for notifying that the tire has abnormally deformed due to a decrease in the air pressure of the tire, a pneumatic tire having the function, and the like have been proposed.
[0003]
For example, there has been proposed a pneumatic tire in which a rib that comes into contact with a road surface only when the air pressure drops is provided on a shoulder portion of a tread surface, and the rib is grounded to generate an unusual pattern noise (for example, Patent Document 1). reference).
[0004]
Further, there has been proposed an internal pressure drop warning device in which a rubber projection member is protruded from a rim to increase vibration transmitted to a vehicle when air pressure drops (for example, see Patent Document 2).
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-43522 [Patent Document 2]
JP-A-9-169203
[Problems to be solved by the invention]
However, the above-described pneumatic tires and alarm devices have a problem that a decrease in air pressure cannot be known unless the vehicle is running. In addition, there is a problem that only a passenger can know the decrease in the air pressure, and only those who can recognize the decrease in the air pressure are limited.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a pneumatic tire and a tire abnormal deformation notifying device capable of notifying other than the occupant that the tire has abnormally deformed due to a decrease in air pressure when the vehicle is stopped or running.
[0008]
[Means for Solving the Problems]
The pneumatic tire of the present invention that achieves the above object is provided with a tire abnormal deformation notifying device provided with at least a pair of fins facing the outer surface of the sidewall portion, and reduces the pair of fins of the tire abnormal deformation notifying device by air pressure reduction. At the time of overload or overload.
[0009]
The tire abnormal deformation alarm device of the present invention is a tire abnormal deformation alarm device attached to an outer surface of a sidewall portion of a pneumatic tire, and has at least one pair of fins facing each other, and when the pair of fins has a low air pressure or It is characterized in that it can be opened by bending of the side wall portion at the time of overload.
[0010]
According to the present invention described above, the pair of fins are expanded when the tire is abnormally deformed due to the sidewall portion flexing at the time of a decrease in air pressure or overload. In addition, it is possible to notify a person other than the occupant that the tire has abnormally deformed during traveling.
[0011]
On the other hand, during traveling, wind noise is generated by the fins projecting from the side wall portion, so that the traveling occupant can be informed aurally that the tire is abnormally deformed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
FIG. 1 shows an example of the pneumatic tire of the present invention, wherein 1 is a tread portion, 2 is a sidewall portion, 3 is a bead portion, and CL is a tire center line. A carcass layer 4 is mounted between the left and right bead portions 3, and both ends of the carcass layer 4 are folded from the inside of the tire to the outside so as to sandwich the bead filler 6 around the bead core 5. A belt layer 7 is provided on the outer peripheral side of the carcass layer 4 of the tread portion 1. A reinforcing layer 8 is provided outside the carcass layer 4 of the bead portion 3.
[0014]
On the outer surface 9 of the sidewall portion 2, a tire abnormal deformation notifying device 10 for notifying abnormal deformation of the tire is provided. As shown in FIGS. 2 and 3, the abnormal tire deformation notification device 10 includes a plate-shaped base portion 11 attached to the outer surface 9 of the sidewall portion 2, and a pair of projections integrally provided on the base portion 11. Fins 12 and 13 are provided.
[0015]
The pair of fins 12 and 13 are spaced apart in the tire radial direction and face each other. When the air pressure or the load is in a normal range, the fins 12 and 13 are folded and stored on the facing side as shown in FIG. When the sidewall portion 2 is greatly bent and abnormally deformed at the time of overload, it can be expanded as shown in FIGS. In FIG. 4, reference numeral 20 denotes a rim mounted on the pneumatic tire.
[0016]
At a portion of the base portion 11 located between the fins 12, 13, a warning display portion 14 having a color different from the fins 12, 13 such as red is provided. It is exposed. Instead of different colors, as shown in FIG. 5, a warning display unit 14 made of characters may be used. Alternatively, instead of the base portion 11, a warning display portion 14 having a different color may be provided on the facing surface of the fins 12, 13, so that the warning display portion 14 is exposed at the time of expanding.
[0017]
The base 11 and the pair of fins 12, 13 are preferably made of rubber. The fins 12 and 13 expanding from the retracted state as described above may have a configuration in which rubber plates having different moduli are laminated (the rubber modulus of the rubber plate on the facing side is made higher) or a reinforcement extending in the protruding direction. A configuration in which the cords are arranged in the width direction in the rubber plate can be adopted.
[0018]
When notifying abnormal deformation due to a decrease in air pressure, for example, it is preferable to adopt a configuration in which the airbag is expanded when the air pressure becomes 70% or less of the maximum air pressure specified in JATMA2002.
[0019]
In addition, when an abnormal shape due to an overload caused by overloading a truck or the like is reported, for example, the maximum tire pressure at the maximum air pressure and the maximum load (the maximum load capacity corresponding to the maximum air pressure) specified in JATMA2002. It is preferable to adopt a configuration in which when the amount of bending increases by 40% or more with respect to the amount of bending (difference from the maximum width of the tire at the time of no load), the opening is expanded.
[0020]
In the example shown in the drawing, the tire abnormal deformation notifying device 10 is detachably attached to the sidewall portion 2 by attaching the base portion 11 to the outer surface 9 of the sidewall portion 2 via an adhesive. However, when the tire is made of rubber, the tire may be vulcanized and adhered at the time of vulcanizing the tire to be integrally formed.
[0021]
According to the above-described present invention, the pair of fins 12 and 13 expand when the sidewall portion 2 flexes and abnormally deforms when the tire is inflated or when the tire is overloaded. This can be easily notified to the person and the person other than the occupant during traveling that the tire has abnormally deformed.
[0022]
Further, during traveling, wind noise is generated by the fins 12 and 13 projecting from the sidewall portion 2, so that the traveling occupant can be informed audibly that the tire is abnormally deformed.
[0023]
Further, by providing the warning display section 14 that is exposed when the fins 12 and 13 are expanded, it is possible to more effectively notify the tire deformation abnormality.
[0024]
In the present invention, the above-described tire abnormal deformation alarm device 10 has a position on the outer surface 9 of the sidewall portion 2, which is a quarter of the tire cross-section height SH on both sides in the tire radial direction from the tire maximum width position H. It is preferable that the pair of fins 12 and 13 be provided so as to be located in the region Z up to the end. Departing from this region Z is not preferable because the fins 12 and 13 are difficult to open.
[0025]
As shown in FIG. 6, the tire abnormal deformation notifying device 10 may be provided on the bottom surface of the concave portion 15 formed on the outer surface 9 of the sidewall portion 2. What is provided in the concave portion 15 of the outer surface 9 is also provided in the outer surface 9 of the sidewall portion 2 according to the present invention.
[0026]
In the above embodiment, the tire abnormal deformation notifying device 10 is exemplified as having the pair of fins 12 and 13. However, two or more pairs, for example, the pair of fins are expanded by bending of the sidewall portion 2 when the air pressure is reduced. The configuration may be such that a decrease in air pressure is notified, and the other pair of fins is expanded by bending of the sidewall portion 2 when the overload is applied to notify the overload. In the present invention, the tire abnormal deformation alarm device 10 is provided. May have at least a pair of fins 12 and 13.
[0027]
Further, the fins 12 and 13 of the tire abnormal deformation notifying device 10 are not limited to the above-described configuration, and may have another configuration as long as the fins 12 and 13 are expanded by bending of the sidewall portion 2 at the time of air pressure drop or overload. Needless to say, this may be done.
[0028]
【The invention's effect】
As described above, the present invention is configured such that at least one pair of fins of the tire abnormal deformation indicator attached to the outer surface of the sidewall portion of the pneumatic tire can be expanded by bending of the sidewall portion at the time of air pressure drop or overload. Therefore, when the vehicle is stopped or running, it is possible to notify that the tire has been abnormally deformed due to a decrease in air pressure or the like, in addition to the passenger.
[Brief description of the drawings]
FIG. 1 is a tire meridian half sectional view showing an embodiment of a pneumatic tire of the present invention.
FIGS. 2A and 2B are enlarged views of the tire abnormal deformation alarm device of FIG. 1, wherein FIG. 2A is a cross-sectional view and FIG.
3A and 3B show a state in which the fins of the abnormal tire deformation alerting device of FIG. 2 are expanded, wherein FIG. 3A is a cross-sectional view and FIG. 3B is an arrow view of FIG.
FIG. 4 is a half-sectional explanatory view showing a state where a sidewall portion of a pneumatic tire is abnormally deformed and a fin is opened.
FIG. 5 is an explanatory view showing another example of the warning display section of the tire abnormal deformation alarm.
FIG. 6 is a cross-sectional view showing another method of mounting the tire abnormal deformation alarm.
[Explanation of symbols]
Reference Signs List 1 tread portion 2 sidewall portion 3 bead portion 9 outer surface 10 tire abnormal deformation notifying device 11 base portions 12, 13 fins 14 warning display portion H tire maximum width position SH tire cross-section height Z area

Claims (6)

A tire abnormal deformation alarm including at least a pair of fins facing the outer surface of the sidewall is provided, and the pair of fins of the tire abnormal deformation alarm expands due to bending of the sidewall when air pressure is reduced or overload occurs. Pneumatic tire made openable. The tire abnormal deformation notifying device is provided so that the pair of fins is located in a region from a tire maximum width position H to a position having a length of 1/4 times the tire sectional height SH on both sides in the tire radial direction. 2. The pneumatic tire according to 1. The pneumatic tire according to claim 1, wherein the tire abnormal deformation notification device is detachably provided. 4. The pneumatic tire according to claim 1, wherein the tire abnormal deformation notifying device has a warning display portion that is exposed when the pair of fins is expanded. 5. A tire abnormal deformation alarm attached to the outer surface of a sidewall portion of a pneumatic tire, the device having at least a pair of fins facing each other, the pair of fins being bent at the time of air pressure reduction or overload due to bending of the sidewall portion. An abnormal tire deformation alarm that can be expanded. The tire abnormal deformation alarm device according to claim 5, further comprising a warning display portion that is exposed when the pair of fins is expanded.

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