JP4126327B1 - Pneumatic tire - Google Patents

Abstract

Provided is a pneumatic tire that can be promptly sealed with a puncture-preventing sealant and can prevent unevenness of the puncture-preventive sealant even when a tire tread portion is stabbed.
SOLUTION: An inner liner rubber 12 provided on a tire inner wall surface of a tire air chamber 11 is continuously partitioned along a circumferential direction on the inner wall surface of a tire tread portion 13, and a puncture-preventing sealing agent 14 is provided therein. The sealant chambers 15 of the plurality of chambers into which the liquid is injected are connected in such a manner that the end portions thereof overlap the end portions of the adjacent sealant chambers 15.
[Selection] Figure 1

Description

  The present invention relates to a pneumatic tire such as a tubeless tire that can suppress air leakage when a tire tread portion that is a portion in contact with a road surface is pierced by a nail or the like and air leakage occurs.

  Conventionally, pneumatic tires such as tubeless tires, when a tire tread is punctured by a nail tread or the like, removes the nail or the like and then applies a sealing sealant to the air chamber inside the tire. The sealing agent for sealing is fed into the puncture site by the pressure and sealed. However, in such a pneumatic tire, if the tire tread is stabbed by a nail tread, etc., the air in the tire will escape, but if you are traveling at high speed, the air will suddenly escape and you will be unable to operate the steering wheel, which is extremely dangerous. There are cases. In addition, after removing nails, etc. from a tire that has been stabbed into the tire tread portion, the pressure inside the air chamber is reduced when only the sealing agent for sealing is injected into the air chamber inside the tire. Even if high-pressure air is sent to the air chamber after this, the sealing agent accumulates below the inside of the air chamber, and it is difficult to send the sealing agent for sealing well to the puncture site for sealing.

Therefore, conventionally, a pneumatic tire has been introduced as a pneumatic tire that can delay the air leakage from the puncture of the tire tread portion caused by nailing or the like as much as possible. For example, in a pneumatic tire for delaying air leakage as much as possible from the puncture of the tire tread due to such nails, etc., the inner liner rubber of the inner peripheral wall of the tire tread and the plate-like seal attached to the outside thereof A rubber sheet is disclosed in which a single bag-like portion is formed on the entire inner peripheral wall of the tire tread portion, and a puncture-preventing sealing agent is injected into the bag-like portion (for example, Patent Document 1, Patent Document). 2).
Also, in pneumatic tires to delay air leakage as much as possible from punctures on the tire tread due to nails, etc., one or more injecting a puncture-preventing sealant into the inner liner rubber on the inner peripheral wall of the tire tread A puncture sealant-sealed tube having a bag-like sealant chamber in the tire circumferential direction is joined (for example, see Patent Document 3).
Further, in a pneumatic tire for delaying air leakage as much as possible from puncture of the tire tread due to nailing or the like, one piece is injected with a sealing agent for preventing puncture on the inner inner peripheral wall of the tire tread in the entire inner peripheral wall of the tire. Two bag-like sealant chambers for injecting a puncture-proof sealant into each of the inner peripheral walls on both side walls of the entire tire inner peripheral wall A puncture sealant-sealed tube is joined (for example, see Patent Document 4).

JP 2000-255227 A JP 2000-247122 A JP 2002-59722 A Japanese Patent Laid-Open No. 10-16507

However, the conventional pneumatic tire as described above has the following problems.
(1) A pneumatic tire as disclosed in Japanese Patent Application Laid-Open Nos. 2000-255227 and 2000-247122 includes an inner liner rubber on the inner peripheral wall of the tire tread portion and a plate-like seal attached to the outside thereof. A rubber seal sheet forms a bag-like part and a sealant chamber on the entire inner peripheral wall of the tire tread part, and a puncture-preventing sealant is injected into the bag, so that the tire tread part is punctured with a nail, etc. When the received pneumatic tire is stopped, the puncture-preventing sealant is concentrated in a bag-like part in the whole chamber or below the sealant chamber and concentrated on the upper side of the pneumatic tire. In order to seal, the puncture-preventing sealant is insufficient, and it is difficult to feed and seal a sufficient puncture-preventive sealant into the puncture site. In addition, even if the tire tread puncture can be sealed with a puncture-preventing sealant, the puncture-preventive sealant is in a bag-like shape below the tire air chamber while the vehicle equipped with a pneumatic tire is stopped. The puncture-preventing sealant that is concentrated in the part and in the sealant chamber and spreads again when the pneumatic tire rotates again is slow to spread all over the bag-like part and the sealant chamber. The weight of the anti-puncture sealant generates a distorted centrifugal force in the rotation of the pneumatic tire, causing a risk of running.

  (2) A pneumatic tire as disclosed in Japanese Patent Application Laid-Open No. 2002-59722 has one or two or more bag-like shapes in which a puncture-preventing sealant is injected into the inner liner rubber on the inner peripheral wall of the tire tread portion. Since the puncture sealant-enclosed tube with the sealant chamber provided in the tire circumferential direction is joined, even if there are a plurality of puncture sealant-enclosed tubes in the tire circumferential direction, the tire tread portion is similar to the above. When a pneumatic tire that has been stabbed stops, the puncture-preventing sealant is concentrated on the lower side of the tube containing the puncture sealant, and the puncture is sealed to seal the puncture part when it is above the pneumatic tire. There is a shortage of prevention sealing agent, and it is difficult to feed and seal a sufficient anti-puncture sealing agent to the puncture site. In addition, even if the tire tread puncture can be sealed with a puncture-preventing sealant, the puncture-preventive sealant is placed under the tire air chamber while the vehicle equipped with the pneumatic tire is stopped. The weight of the puncture-preventing sealant in the biased state is slow because the puncture-preventing sealant that is concentrated in the agent-filled tube and then spreads again when the pneumatic tire rotates again travels all around the tube. This creates a risk of running by generating a distorted centrifugal force in the rotation of the pneumatic tire.

  (3) A pneumatic tire as disclosed in Japanese Patent Application Laid-Open No. 10-16507 has a single bag shape in which a sealing agent for preventing puncture is injected into an inner peripheral wall of a tire tread portion in the entire inner peripheral wall of a tire. A puncture sealant having two seal-like sealant chambers in the tire circumferential direction for injecting a sealant for puncture prevention into each of the sealant chamber and the inner peripheral walls on both side walls of the entire tire inner peripheral wall Since the enclosing tube is joined, for example, even if a bag-like sealant chamber is provided on the inner inner peripheral wall of the tire tread, and a puncture sealant enclosing tube is provided on each of the inner inner walls of both side walls, When a pneumatic tire that has been stabbed on the tread or both side walls is stopped, the puncture-preventing sealant is concentrated on the lower side of the puncture-sealing agent-filled tube and is located above the pneumatic tire. Stab portion insufficient puncture-preventing sealant to seal and that sealing becomes difficult by feeding sufficient puncture-preventing sealant stab portion. In addition, even if the tire tread and the stabs on both side walls could be sealed with a puncture-preventing sealant, the puncture-preventive sealant is applied to the tire air while the vehicle equipped with a pneumatic tire is stopped. The puncture-preventing sealant that concentrates in the puncture-sealing tube below the room and concentrates on the tube, and the puncture-preventive sealant that spreads when the pneumatic tire rotates again travels slowly around the entire circumference of the tube. The weight of the sealing agent generates a distorted centrifugal force in the rotation of the pneumatic tire, causing a risk of running.

  The present invention has been made in view of such circumstances, and even if the tire tread portion is stabbed, it can be promptly sealed with a puncture-preventing sealant and can prevent the unevenness of the puncture-preventive sealant. An object is to provide a pneumatic tire.

The pneumatic tire according to the present invention that meets the above object is continuously partitioned along the inner wall surface of the tire tread portion of the inner liner rubber provided on the inner wall surface of the tire air chamber, and has a puncture-preventing seal inside. In a pneumatic tire having a plurality of sealant chambers filled with an agent connected so that the end portions of the sealant chambers overlap with the end portions of adjacent sealant chambers, the sealant chamber has a wall width inside the tire tread portion. An outer peripheral portion of one surface of a substantially rectangular sheet-like sealing rubber sheet having a substantially equal or larger lateral width and a length smaller than the lateral width , a wall surface of an inner liner rubber inside a tire tread portion, and an adjacent sealing rubber together they are formed by joining in such a manner to overlap the adhesive becomes on the tire rotation direction destination with respect to a rotation axis direction of the tire to the other end of a surface of the sheet, Pa in the sealant chamber And click-preventing sealant is filled you are connecting multiple chambers.

The pneumatic tire according to the present invention that meets the above object is continuously partitioned along the inner wall surface of the tire tread portion of the inner liner rubber provided on the inner wall surface of the tire air chamber, and has a puncture-preventing seal inside. In a pneumatic tire having a plurality of sealant chambers filled with an agent connected so that the end portions of the sealant chambers overlap with the end portions of adjacent sealant chambers, the sealant chamber has a wall width inside the tire tread portion. One surface of a substantially rectangular bag-like sealing rubber bag having a substantially equal or larger lateral width and a length smaller than the lateral width is connected to the wall surface of the inner liner rubber inside the tire tread portion and the other one of the adjacent sealing rubber bags. together are formed by joining in such a manner to overlap the adhesive becomes on the surface and edge with respect to a rotation axis direction of the tire in the tire rotation direction destination, puncture-preventing sealant to sealant chamber It is Hama and you are connecting more than one room.

The pneumatic tire according to claim 1 , wherein the sealant chamber has a lateral width substantially equal to or larger than a wall width inside the tire tread portion, and one surface of a substantially square sheet-like sealing rubber sheet having a length smaller than the lateral width. The outer peripheral part of the inner liner rubber on the inner side of the tire tread part and the other surface end part of the adjacent sealing rubber sheet so as to be above the tire rotation axis direction in the tire rotation direction It is formed by overlapping and bonding with an adhesive, and the sealant chamber is filled with a puncture-preventive sealant and connected to a plurality of chambers, so that the tire tread part reaches the tire air chamber by nail treading etc. Even if there is such a stab, a sealing agent for preventing puncture that is continuously divided by a substantially rectangular shape having a width substantially equal to or larger than the wall width inside the tire tread portion and a length smaller than this width is injected. Quickly stab portion in the puncture-preventing sealant which is filled in any of several chambers of sealant chamber was able to seal the. In addition, when a vehicle equipped with a pneumatic tire is stopped, the downward bias of the puncture-preventing sealant is only the bias in the sealant chamber of the small room. Since the downward bias of the agent does not occur, it is possible to prevent the generation of centrifugal distortion due to the weight of the puncture-preventing sealing agent when the pneumatic tire is rotated again during traveling, thereby ensuring the safety of traveling. Furthermore, since there is an overlap between adjacent sealant chambers, it is possible to spread the sealant for preventing puncture even if there is a puncture due to a nail tread at any position of the tire tread part. The stab can be sealed. In particular, as the pneumatic tire rotates, the sealing rubber sheets in the plurality of sealing agent chambers act so as to be pressed against the wall surface of the inner liner rubber inside the tire tread, respectively, and the puncture preventing sealing agent acts as the inner liner rubber. Even if there is a stab that reaches the tire air chamber due to a nail or the like on the tire tread portion, the stab portion can be quickly sealed with a puncture-preventing sealant.

In the pneumatic tire according to claim 2 , the sealant chamber has a lateral width substantially equal to or larger than a wall width inside the tire tread portion, and is one of the substantially rectangular bag-shaped sealing rubber bags having a length smaller than the lateral width . The surface is overlapped on the inner liner rubber wall surface inside the tire tread portion and the other surface end of the adjacent sealing rubber bag so that it is above the tire rotation axis in the tire rotation direction. It is formed by joining with an adhesive, and the sealant chamber is filled with a puncture-preventive sealant, and a plurality of chambers are connected, so that the tire tread part reaches the tire air chamber by nailing or the like. Even if there is a stab wound, a plurality of chambers filled with a puncture-preventing sealant that is continuously divided by a substantially rectangular shape having a width substantially equal to or larger than the wall width inside the tire tread portion and a length smaller than this width. sticker It is possible to quickly seal the stab portion in the puncture-preventing sealant which is filled in one of the chambers. In addition, when a vehicle equipped with a pneumatic tire is stopped, the downward bias of the puncture-preventing sealant is only the bias in the sealant chamber of the small room. Since the downward bias of the agent does not occur, it is possible to prevent the generation of centrifugal distortion due to the weight of the puncture-preventing sealing agent when the pneumatic tire is rotated again during traveling, thereby ensuring the safety of traveling. Furthermore, since there is an overlap between adjacent sealant chambers, it is possible to spread the sealant for preventing puncture even if there is a puncture due to a nail tread at any position of the tire tread part. The stab can be sealed. In particular, as the pneumatic tire rotates, the sealing rubber bags in the plurality of sealant chambers act so as to be pressed against the inner peripheral wall of the innerliner rubber inside the tire tread portion, and the puncture-preventing sealant acts as the innerliner. Even if there is a stab in the tire tread that reaches the tire air chamber due to a nail or the like, the stab can be quickly sealed with a puncture-preventing sealant. . Moreover, the sealing agent chamber connected easily can be formed by sticking a bag-shaped sealing rubber bag.

Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.
FIG. 1 is an explanatory diagram of a pneumatic tire according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of Example 1 of the pneumatic tire, and FIG. 3 is an explanation of Example 2 of the pneumatic tire. FIG.

A pneumatic tire according to an embodiment of the present invention will be described with reference to FIG. Here, FIG. 1 is a longitudinal sectional view of a pneumatic tire.
As shown in FIG. 1, a pneumatic tire 10 according to an embodiment of the present invention is not particularly limited to a target vehicle using the pneumatic tire 10, and for example, an automobile, a motorcycle, a bicycle It can be used as a tire for use. The pneumatic tire 10 is provided with a tire air chamber 11 therein, and an inner liner rubber 12 is provided on a tire inner wall surface. The pneumatic tire 10 is continuously partitioned along the wall surface of the inner liner rubber 12 which is the inner wall surface of the tire tread portion 13 which is substantially a contact surface with the road, and has a puncture-preventing seal inside. A plurality of sealant chambers 15 into which the agent 14 is injected are provided. Further, the pneumatic tire 10 has a plurality of sealant chambers 15 connected so that the end portions thereof overlap with the end portions of the adjacent sealant chambers 15.

  When this pneumatic tire 10 is stabbed to reach the tire air chamber 11 by nailing or the like in the tire tread portion 13, the puncture-preventing sealing agent 14 flows into the stabbed portion and seals it. Leakage can be suppressed. The shape of the sealant chamber 15 is not limited, and may be any shape such as a circle, an ellipse, a polygon, a trapezoid, and a quadrangle.

  For example, for automobile tires applied to the pneumatic tire 10 described above, tires of various shapes such as radial tires, normal tires, snow tires, studless tires, and the like are produced according to the purpose. There are various types of materials. The pneumatic tire 10 usually has a reinforcing layer on the inner side of the tire tread portion 13 and the side portions extending radially inward from both ends of the tire tread portion 13, and the necessary tire strength, Stiffness is given. The inner liner rubber 12 provided on the tire inner wall surface of the tire air chamber 11 is made of, for example, butyl rubber, halogenated butyl rubber, brominated butyl rubber, or the like, and has a substantially uniform thickness of, for example, about 0.5 to 2.0 mm. By having a thickness and being arranged so as to cover the entire inner wall surface of the tire air chamber 11, the permeation of gas such as compressed air filled in the tire air chamber 11 is blocked. Further, although the material for the puncture-preventing sealing agent 14 is not limited, it is usually liquid or gel at room temperature (20 ° C.). For example, the viscosity is 2.0 to 10.0 mPa · s ( A viscous material having a temperature of 20 ° C. is preferably used. In addition to this, some of the sealing agents 14 for preventing punctures can seal stabs received by nailing when the temperature is in the range of -20 ° C to 60 ° C. Various puncture-preventing sealing agents 14 can be used.

Example 1 of the pneumatic tire according to one embodiment of the present invention will be described with reference to FIG. Here, FIG. 2 is a schematic view of the pneumatic tire according to the first embodiment viewed in cross section.
As shown in FIG. 2, the pneumatic tire 10 a according to the embodiment of the present invention is similar to the case of the pneumatic tire 10 described above, so that the inner area of the tire inner wall surface of the tire air chamber 11 is covered. A liner rubber 12 is provided. The pneumatic tire 10a is continuously compartment I along the wall surface of the tire tread portion 13 inward of the inner liner rubber 12, the sealant chamber 15a of a plurality chambers puncture preventing sealant 14 is injected into the interior Is provided. The plurality of sealant chambers 15a are connected so that the end portions thereof overlap the end portions of the adjacent sealant chambers 15a.

  In the sealing agent chamber 15a of the pneumatic tire 10a described above, one width in a plan view is made substantially the same as or slightly larger than the size of the tire tread portion 13, and the length in the connecting direction is made slightly smaller. A plurality of substantially rectangular sheet-like sealing rubber sheets 16 are used. The sealing rubber sheet 16 is not limited in material, but it is necessary to block the permeation of gas such as compressed air filled in the tire air chamber 11, so that the rubber used for the inner liner rubber 12 Equivalent rubber can be used. In addition, the thickness of the sealing rubber sheet 16 in this case should just be about 0.5-2.0 mm. If the thickness is less than 0.5 mm, the strength is insufficient and the puncture-preventing sealing agent 14 is not stably retained, and the pressure of the compressed air filled in the tire air chamber 11 is used to prevent puncture. It is difficult to uniformly load the sealant 14. Moreover, when thickness exceeds 2.0 mm, an unnecessary weight increase will be caused.

Next, the sealing rubber sheet 16 has an outer peripheral portion from a side edge of one surface, the wall surface of the inner liner rubber 12 inside the tire tread portion 13, and the other surface end of the adjacent sealing rubber sheet 16. The tires are overlapped with each other in the rotational direction of the tire so as to be above the rotational axis direction of the tire and are joined with an adhesive. This sealing rubber sheet 16 overlaps with an end portion of the adjacent sealing rubber sheet 16, so that a seal for preventing puncture of the sealant chamber 15 a is formed on the entire peripheral surface of the inner liner rubber 12 inside the tire tread portion 13. Agent 14 can be provided. In addition, the solvent type adhesive which can adhere | attach rubber | gum can be used for said adhesive agent.

In addition, the width of the outer peripheral portion from the side edge of one surface, which is the bonding width of the sealing rubber sheet 16 with the adhesive, is not particularly limited, but is, for example, 4.0 mm to 15.0 mm. Any degree is acceptable. When the width is less than 4.0 mm, the adhesive strength is insufficient, and the width is easily peeled. When the width exceeds 15.0 mm, the volume of the sealant chamber 15a is reduced. Since this sealing rubber sheet 16 is formed by being overlapped with the other surface end portion of the adjacent sealing rubber sheet 16 and joined with an adhesive, the tire rubber tread 13 is placed in the tire air chamber 11 by nailing or the like. Even if there is a stab that reaches the point, the puncture is quickly removed by the puncture-preventing sealing agent 14 in one of the sealant chambers 15a provided continuously over the entire circumference of the inner wall surface of the tire tray 13. It can be sealed. The sealing rubber sheet 16 is overlapped with an adhesive on the other surface end of the adjacent sealing rubber sheet 16 so that the sealing rubber sheet 16 is above the rotation axis of the tire in the rotation direction of the tire. Since they are joined and formed, the sealing rubber sheets 16 of the plurality of sealing agent chambers 15a act so as to be pressed against the inner peripheral wall of the inner liner rubber 12 with the rotation of the tire, respectively, thereby preventing the puncture prevention sealing agent. 14 is pressed against the inner liner rubber 12 side, so that even if the tire tread portion 13 is stabbed, the stabbed portion can be quickly sealed.

The above sealant chamber 15a, inside is filled puncture-preventing sealant 14 is more chambers are connected me along the wall surface of the tire tread portion 13 inward of the inner liner rubber 12. For filling the sealant chamber 15a with the sealant 14 for preventing puncture, for example, when the sealant chamber 15a is formed by bonding the sealing rubber sheet 16 with an adhesive, the innerliner rubber 12 is adjacent to the sealant chamber 15a. An injection hole that is not bonded by an adhesive is provided between the sealing rubber sheet 16 and a predetermined amount is injected from the injection hole using a syringe-like injector, and then the opening is bonded by an adhesive. Can

Next, Example 2 of the pneumatic tire according to one embodiment of the present invention will be described with reference to FIG. Here, FIG. 3 is a schematic view of the pneumatic tire according to the second embodiment viewed in cross section.
As shown in FIG. 3, the pneumatic tire 10b according to one embodiment of the present invention covers the entire area of the tire inner wall surface of the tire air chamber 11 as in the case of the pneumatic tires 10 and 10a. The inner liner rubber 12 is provided on the inner side. The pneumatic tire 10b is continuously compartment I along the wall surface of the tire tread portion 13 inward of the inner liner rubber 12, the sealant chamber 15b of a plurality chambers puncture preventing sealant 14 is injected into the interior Is provided. The plurality of sealant chambers 15b are connected so that the end portions thereof overlap the end portions of the adjacent sealant chambers 15b.

  In the sealant chamber 15b of the pneumatic tire 10b described above, one of the widths in the plan view is substantially the same as or slightly larger than the size of the tire tread portion 13, and the length in the connecting direction is slightly smaller than this. A plurality of substantially rectangular bag-like sealing rubber bags 17 are used. The sealing rubber bag 17 is not limited in material as in the case of the sealing rubber sheet 16 of the pneumatic tire 10a. However, the sealing rubber bag 17 transmits gas such as compressed air filled in the tire air chamber 11. Therefore, it is possible to use a rubber equivalent to the rubber used for the inner liner rubber 12. Note that the thickness of the sealing rubber bag 17 in this case may be about 0.5 to 2.0 mm as in the case of the sealing rubber sheet 16.

Next, the sealing rubber bag 17 has the entire surface of one surface on the wall surface of the inner liner rubber 12 inside the tire tread portion 13 and the other surface end of the adjacent sealing rubber bag 17 in the tire rotation direction. It is formed by being overlapped so as to be above the rotational axis direction of the tire and bonded with an adhesive. This sealing rubber bag 17 overlaps with an end portion of the adjacent sealing rubber bag 17, so that a seal for preventing puncture of the sealant chamber 15 b is formed on the entire peripheral surface of the inner liner rubber 12 inside the tire tread portion 13. Agent 14 can be provided. In addition, the solvent type adhesive which can adhere | attach rubber | gum can be used for said adhesive agent similarly to the case of said pneumatic tire 10a. Since this sealing rubber bag 17 is formed by being overlapped with the other surface end portion of the adjacent sealing rubber bag 17 and bonded with an adhesive, the tire rubber tread 13 is placed in the tire air chamber 11 by nail treading or the like. Even if there is a stab that reaches the point, the puncture part is quickly removed with the puncture-preventing sealing agent 14 in one of the sealant chambers 15b provided continuously over the entire circumference of the inner wall surface of the tire toret 13. It can be sealed. In addition, this sealing rubber bag 17 is formed by being overlapped on the other surface end of the adjacent sealing rubber bag 17 so as to be on the front in the rotational direction of the tire and bonded with an adhesive, As the tire rotates, the sealing rubber bags 17 in the plurality of sealant chambers 15b act so as to be pressed against the inner peripheral wall of the inner liner rubber 12, respectively, and the puncture preventing sealant 14 is pressed against the inner liner rubber 12 side. Thus, even if the tire tread portion 13 has a stab wound, the stab wound portion can be quickly sealed.

The above sealant chamber 15b, inside is filled puncture-preventing sealant 14 is more chambers are connected me along the wall surface of the tire tread portion 13 inward of the inner liner rubber 12. For filling the sealant chamber 15b with the puncture-preventing sealant 14, for example, an injection hole is provided when the sealing rubber bag 17 is manufactured, and a prescribed amount is injected from the injection hole using a syringe-like injector. Then, the injection hole can be formed by joining and sealing with an adhesive or the like.

  The pneumatic tire of the present invention can be suitably used as all types of pneumatic tires as tires for automobiles, motorcycles, bicycles, airplanes, special vehicles, etc. it can.

It is explanatory drawing of the pneumatic tire which concerns on one embodiment of this invention. It is explanatory drawing of Example 1 of the pneumatic tire. It is explanatory drawing of Example 2 of the pneumatic tire.

Explanation of symbols

10, 10a, 10b: Pneumatic tire, 11: Tire air chamber, 12: Inner liner rubber, 13: Tire tread part, 14: Sealing agent for preventing puncture, 15, 15a, 15b: Sealing agent chamber, 16: Sealing Rubber sheet, 17: Sealed rubber bag

Claims (2)

A plurality of sealant chambers, which are continuously partitioned along the inner wall surface of the tire tread portion of the inner liner rubber provided on the tire inner wall surface of the tire air chamber and into which puncture-preventing sealant is injected, are provided. In a pneumatic tire having an end portion connected in an overlapping manner with an end portion of the adjacent sealant chamber, the sealant chamber has a lateral width substantially equal to or larger than the inner wall surface width of the tire tread portion. The outer peripheral portion of one surface of a substantially rectangular sheet-like sealing rubber sheet having a small length is connected to the wall surface of the inner liner rubber inside the tire tread portion and the other surface end portion of the adjacent sealing rubber sheet. in conjunction with and is formed by joining in such a manner to overlap the adhesive becomes over with respect to a rotation axis direction of the tire in the tire rotation direction destination, sea for the puncture-resistant in the sealant chamber A pneumatic tire wherein the plurality chambers agent is filled and wherein the articulating. A plurality of sealant chambers, which are continuously partitioned along the inner wall surface of the tire tread portion of the inner liner rubber provided on the tire inner wall surface of the tire air chamber and into which puncture-preventing sealant is injected, are provided. In a pneumatic tire having an end portion connected in an overlapping manner with an end portion of the adjacent sealant chamber, the sealant chamber has a lateral width substantially equal to or larger than the inner wall surface width of the tire tread portion. Rotate the tire on one surface of a small rectangular bag-shaped sealing rubber bag on the wall surface of the inner liner rubber inside the tire tread portion and on the other surface end of the adjacent sealing rubber bag. together are formed by joining in such a manner to overlap the adhesive becomes over with respect to a rotation axis direction of the tire in the direction away, the said puncture-preventing sealant is filled in the sealant chamber A pneumatic tire which several rooms is characterized in that it articulated.

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