JP2005262921A - Assembly of pneumatic tire and rim - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly of a pneumatic tire and a rim capable of reducing vibration and noise in traveling. <P>SOLUTION: This assembly 1 of the pneumatic tire and the rim includes the rim 3 and the pneumatic tire 2 installed to this rim 3. A sound control tool 9 is fixed in a tire internal space 4. The sound control tool 9 includes a belt-like body composed of a sponge material and extending in the tire circumferential direction, and a water absorption preventive resin film formed on the surface of the belt-like body and capable of preventing water absorption to the inside. The volume of the belt-like body is set to 0.4 to 20 % of the whole volume of the tire internal space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an assembly of a pneumatic tire and a rim that can reduce noise while preventing generation of vibration during traveling.

  One of the tire noises is so-called road noise that produces a “go” sound in a frequency range of about 50 to 400 Hz when traveling on a road surface. One of the main causes is known to be resonance vibration (cavity resonance) of air generated in the tire lumen. For example, as shown in FIG. 7, the applicant of the present application has proposed to arrange a sound-reducing band a made of a sponge material and extending in the tire circumferential direction in the tire lumen b (for example, the following patent) Reference 1). The strip a can convert vibration energy of air in the tire lumen b into heat energy, and can effectively suppress cavity resonance in the tire lumen.

JP 2002-67608 A

  By the way, when the tire is stored alone, rain water, condensed water, or the like may accumulate in the cavity inside the tire. If moisture accumulates in the cavity of the tire, it is not easy to completely drain or dry it from its shape. Moreover, when the rim is assembled by arranging the belt-like body as described above on a tire from which moisture has not been completely discharged, the water c is absorbed by the belt-like body a as schematically shown in FIG. In such an assembly, the weight of the specific part increases due to the water absorption of the belt-like body a, and therefore, weight imbalance tends to occur. For this reason, there is a problem that vibrations occur during high-speed traveling, causing discomfort to the vehicle occupants.

  The present invention has been devised in view of the above circumstances, and a noise control device disposed in a tire lumen is made of a sponge material and extends in the tire circumferential direction, and the surface of the belt-like body. It is composed of a resin film part for preventing water absorption that is arranged on the inside and prevents water absorption inside, and prevents the band from absorbing water, reducing the noise while preventing vibration during driving. An object of the present invention is to provide an assembly of a rubbing pneumatic tire and a rim.

  The invention according to claim 1 of the present invention is an assembly of a pneumatic tire and a rim including a rim and a pneumatic tire mounted on the rim, the tire surrounded by the pneumatic tire and the rim. The sound control tool is fixed inside the lumen, and the sound control tool is made of a sponge material and extends in the tire circumferential direction, and is disposed on the surface of the belt and can prevent water absorption inside. And a resin film portion for preventing water absorption, and the volume of the strip is 0.4 to 20% of the total volume of the tire lumen.

Here, the volume of the belt-like body is an apparent volume determined from the outer shape of the belt-like body, and includes the volume occupied by the internal bubbles. Further, the “total volume of the tire lumen” is determined as a value V1 approximately obtained by the following equation (1) in a no-load state in which the assembly is filled with normal internal pressure.
V1 = A × {(Di−Dr) / 2 + Dr} × π (1)
In the formula, “A” is the tire lumen area obtained by CT scanning of the tire lumen in the normal state, “Di” is the maximum outer diameter of the tire lumen in the normal state shown in FIG. 1, and “Dr” is The rim diameter, “π”, is the circumference ratio.

  In addition, “regular internal pressure” is the air pressure that each standard defines for each tire in the standard system including the standard on which the tire is based. The maximum air pressure for JATMA and the table “TIRE LOAD LIMITS AT for TRA” The maximum value described in “VARIOUS COLD INFLATION PRESSURES”, “INFLATION PRESSURE” if it is ETRTO, but if the tire is for a passenger car, it will be uniformly 200 kPa in consideration of the actual usage frequency.

  The invention according to claim 2 is characterized in that the resin film portion is made of a resin sheet fixed to a strip using an adhesive tape or an adhesive. It is an assembly.

  The invention according to claim 3 is the pneumatic tire and rim assembly according to claim 1 or 2, wherein the sponge material has a specific gravity of 0.005 to 0.06.

  According to a fourth aspect of the present invention, there is provided the pneumatic tire and rim assembly according to any one of the first to third aspects, wherein the belt-like body is substantially the same in cross section and is continuous in the tire circumferential direction.

  In the present invention, the noise control device disposed in the tire lumen is made of a sponge material and extends in the tire circumferential direction, and is provided on the surface of the belt for water absorption prevention that can prevent water absorption to the inside. Resin film part. For this reason, even when the noise control device comes into contact with moisture remaining inside the tire, the resin film portion can prevent water absorption of the belt-like body. Therefore, there is no weight imbalance that causes an increase in weight in a specific portion of the tire. As a result, tire vibrations can be prevented during high speed running. In addition, since the sound control device limits the volume of the belt-like body to a certain range with respect to the volume of the tire lumen, it can suppress cavity resonance in the tire lumen and reduce noise during traveling.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a meridian cross-sectional view including a tire shaft of an assembly of a pneumatic tire 2 and a rim 3 (hereinafter, simply referred to as “assembly”) 1 according to an embodiment of the present invention, and FIG. -A sectional view, FIG. 3 shows an enlarged view of the main part of FIG.

  The assembly 1 of the present embodiment includes a pneumatic tire 2 (hereinafter simply referred to as “tire 2”) and a rim 3.

  In the present embodiment, the rim 3 is a so-called metal two-piece wheel rim having a rim body 3a to which the bead portion 2b of the tire 2 is mounted and a disk 3b for holding the rim body 3a. Of course, a 1 pcs rim can also be used.

  The tire 2 has a tread portion 2t, a pair of sidewall portions 2s, 2s extending inward in the tire radial direction from both ends thereof, and a pair of bead portions 2b, 2b provided at the inner ends thereof. Toroidal shape. As shown in FIG. 3, the tire 2 of the present embodiment is a tubeless reinforced by using a carcass 6 having a radial structure and a belt layer 7 disposed on the outer side in the tire radial direction and inside the tread portion 2t. A type of radial tire for passenger cars is exemplified.

  The carcass 6 is composed of one or more, for example, one carcass ply 6A using an organic fiber cord. In this example, the belt layer 7 includes two belt plies 7A and 7B that are stacked in the tire radial direction. Each belt ply 7A, 7B is made of a ply arranged with a steel cord inclined at an angle of, for example, about 10 to 30 ° with respect to the tire equator C, and the steel cords are overlapped in a direction crossing each other.

  Further, in the assembly 1 of the present embodiment, the sound control tool 9 is fixed in the tire lumen 4 surrounded by the tire 2 and the rim 3. The noise control device 9 is made of a sponge material and extends in the tire circumferential direction, and a water absorption preventing resin film disposed on the surface of the belt 10 and preventing water absorption into the belt 10. Part 11. In this embodiment, the sound control tool 9 is exemplified as being fixed to the inner surface 4S1 of the tire 2.

  The sponge material is a sponge-like porous structure, for example, in addition to a so-called sponge having open cells in which rubber or synthetic resin is foamed, animal fibers, plant fibers, or synthetic fibers are entangled and integrally connected. Includes web-like ones. The “porous structure” includes not only open cells but also closed cells. Preferably, a synthetic resin sponge such as an ether polyurethane sponge, an ester polyurethane sponge, or a polyethylene sponge, a rubber sponge such as a chloroprene rubber sponge (CR sponge), an ethylene propylene rubber sponge (EDPM sponge), or a nitrile rubber sponge (NBR sponge). Among them, a polyurethane or polyethylene-based sponge including an ether-based polyurethane sponge is particularly preferable from the viewpoints of sound damping property, light weight, foaming controllability, durability, and the like.

  Such a sponge material has a very small specific gravity as compared with the solid rubber, so that a substantial increase in tire weight can be suppressed. The specific gravity of the sponge material is not particularly limited, but is preferably 0.005 to 0.06, more preferably 0.010 to 0.03, and particularly preferably 0.01 to 0.02. When the specific gravity is less than 0.005, it is difficult to obtain sufficient strength of the belt-like body 10, and conversely, when it exceeds 0.06, the weight tends to increase.

  The volume of the strip 10 is set to 0.4 to 20% of the total volume of the tire lumen 4 surrounded by the tire 2 and the rim 3. As described in Patent Document 1 described above, by ensuring the volume of the belt-like body 5 to be 0.4% or more with respect to the total volume of the tire lumen 4, a remarkable road noise reduction of approximately 2 dB or more is achieved. The effect can be expected. Particularly preferably, the volume of the belt-like body 10 is 1% or more, more preferably 2% or more, more preferably 4% or more of the total volume of the tire lumen 4.

  On the other hand, if the volume of the belt-like body 10 exceeds 20% of the total volume of the tire lumen 4, the effect of reducing road noise will reach its peak, and the cost may increase or the weight balance of the assembly 1 may be deteriorated. . From this point of view, the total volume of the strip 10 is particularly preferably 15% or less, more preferably 10% or less of the total volume of the tire lumen 4. Note that such numerical limitation is not limited to the case where the sound control device 9 is configured by a single band-shaped body 10, but also the total volume of the band-shaped body 10 when it is formed by being divided into a plurality of band-shaped bodies 10. The same applies. Therefore, when the strip 10 is provided in a plurality of parts, the numerical range can be read as the total volume of the strip 10.

  The belt-like body 10 of the present embodiment extends in the tire circumferential direction while maintaining the same cross-sectional shape as shown in FIG. 1 or FIG. Since it is “substantially”, both end portions of the belt-like body 10 may be formed in a tapered shape in which the thickness is gradually reduced as in the present embodiment. The specific cross-sectional shape of the belt-like body 10 is not particularly limited, but preferably a rectangular shape, a triangular shape, or a trapezoidal shape is preferable in terms of good workability. The belt-like body 10 of this example is a rod-like body having a horizontally long rectangular cross section with a width in the tire axial direction of 70 mm and a thickness in the tire radial direction of 30 mm and a length of 185 mm. Then, this is bent in an arc shape and fixed to the inner cavity surface 4S1 of the tire 2. This will be described later.

  The resin film portion 11 is disposed on the surface of the belt-like body 10 and prevents water absorption into the belt-like body 10. In the present embodiment, the resin film portion 11 is constituted by a single resin sheet 15. 4 to 5 show an example of a method for fixing the resin film portion 11 to the strip 10. As shown in FIG. 4A, in the present embodiment, the double-sided pressure-sensitive adhesive tape 12 is first attached to an arbitrary plane portion of the strip 10. The double-sided pressure-sensitive adhesive tape 12 is formed, for example, with substantially the same width as that of the belt-like body 10 and is pasted over substantially the entire length of the belt-like body 10. In the present embodiment, the tip portions 10e and 10e on both sides of the belt-like body 10 are sharply tapered so that the thickness is gradually reduced at an angle of 45 °, and the double-sided adhesive tape 12 includes the tip portions 10e, What was affixed on the plane containing 10e is illustrated.

  Next, as shown in FIG. 4B, the belt-like body 10 is positioned and placed on the resin sheet 15, for example, with the double-sided pressure-sensitive adhesive tape 12 facing upward. Then, one side edge 15 a along the longitudinal direction of the double-sided pressure-sensitive adhesive tape 12 of the resin sheet 15 is folded back so as to wrap the belt-like body 10 and bonded to the double-sided pressure-sensitive adhesive tape 12. Similarly, as shown in FIG. 2C, the side edge 15b on the other side of the resin sheet 15 is also folded so as to wrap around the belt-like body 10 and attached to the double-sided pressure-sensitive adhesive tape 12. At this time, it is desirable that the bonding margin of each of the side edges 15a and 15b is substantially half the width of the double-sided pressure-sensitive adhesive tape 12. Thereby, the resin sheet 15 is shape | molded by the substantially cylinder shape which wraps the side surface perimeter of the strip | belt-shaped body 10, and it can prevent that a water | moisture content permeate | transmits to the strip | belt-shaped body 10 from this side surface. The resin sheet 15 is preferably formed in advance to a predetermined size so that the side edges 15a and 15b are substantially aligned when the belt-like body 10 is wrapped.

  Next, an example of processing of both end portions in the longitudinal direction of the resin sheet 15 will be described. First, as shown in FIG. 5A, slits 16 and 17 and triangular cuts 18 and 19 are provided at the end of the resin sheet 15. The notches 18 and 19 are provided at the corners of the resin sheet 15 located on both sides of the front end portion 10e of the strip 10. The slits 16 and 17 are provided in the remaining two corner portions of the resin sheet 15. By these slits 16 and 17 and cuts 18 and 19, at the end of the resin sheet 15, there are a lower ear piece 20 located on the double-sided adhesive tape 12 side, and an upper ear piece 21 provided at a position facing it. Four ear pieces are formed including ear pieces 22 and 23 on both sides located between them.

  Then, as shown in FIGS. 5B to 5C, for example, the ear pieces 22 and 23 on both sides are folded back toward the end face side of the band-like body 10, and the lower and upper ear pieces 20 and 21 are also the same. Can be folded back toward the end face side of the belt-like body 10. Thereby, the end surface of the strip 10 can be completely covered with the resin sheet 15. And the edge part closed with the ear piece of the resin sheet 15 is sealed with an adhesive tape, an adhesive agent, etc. suitably so that each said ear piece may not open. Thereby, as for the strip | belt shaped object 10, the outer periphery and both end surfaces are interrupted | blocked by the resin sheet 15 from the water | moisture content from the outside. In other words, the resin film portion 11 made of the resin sheet 15 is formed on the surface of the belt-like body 10 to prevent water absorption to the inside and maintain a watertight state. In addition, although FIG. 5 demonstrated the end surface side of the one strip | belt-shaped body 10, it cannot be overemphasized that the other end surface can also be coat | covered with the resin sheet 15 in the same procedure.

  The material of the resin sheet 15 is not particularly limited as long as it can wrap the band-like body 10 and obstructs the permeation of moisture, but preferably polyethylene, polyvinylidene chloride, polypropylene or nylon. Such resin materials are suitable because of their high versatility and low cost. Further, the thickness of the resin sheet 15 is not particularly limited as long as it is a level that allows sound to pass through and does not transmit moisture and has no problem in molding and strength, but is preferably 0.01 to 0. .About 10 mm is preferable. The resin sheet 15 of this embodiment has a smooth surface and is formed with a certain thickness.

  The resin film part 11 may be formed in a multilayer structure using two or more resin sheets 15. Thereby, the watertight state of the strip 10 can be made more reliable. Moreover, in the said embodiment, although the double-sided adhesive tape 12 was used for adhesion | attachment with the strip | belt-shaped body 10 and the resin sheet 15, Preferably this acrylic adhesive, a silicone type, a polyether type, or a polyurethane-type adhesive is used for this double-sided adhesive tape 12. A material using the material is preferable in that good adhesion to the belt-like body 10 or the resin sheet 15 can be obtained.

  In the present embodiment, the sound control device 9 configured as described above is, as shown in FIG. 3, the inner surface 4S1 of the tire 2 using the double-sided adhesive tape 14, more specifically, in the tire of the tread portion 2t. It is fixed to the tread lumen surface 2ti which is the surface on the cavity 4 side. At this time, the noise damper 9 is fixed with its longitudinal direction along the tire circumferential direction. Further, in the present embodiment, the sound control tool 9 formed in a rod shape is fixed by being deformed in a circular arc shape along the circumferential direction of the tread lumen surface 2ti. The sound control tool 9 is fixed so that the surface on which the side edges 15a and 15b of the resin sheet 15 are located faces the tread lumen surface 2ti. As a result, the side edges 15a and 15b are fixed by the double-sided pressure-sensitive adhesive tapes 12 and 14 from inside and outside in the tire radial direction, so that the water absorption preventing effect of the belt-like body 10 is further enhanced, and the centrifugal force accompanying the rotation of the assembly 1 Since it is firmly pressed to the tread lumen surface 2ti side, peeling of the resin sheet 15 and the like can be suppressed over a long period of time.

  Further, the noise control tool 9 has a relatively large length in the tire circumferential direction. This length is substantially determined from the cross-sectional shape of the noise control tool 9 and the entire volume of the tire lumen 4. In the case of a radial tire for a passenger car, the circumferential length of the noise control device 9 is preferably 300 to 360 °, more preferably 350 to 359 °, when the circumferential angle α in the tire circumferential direction is expressed. desirable. In this example, there is a discontinuity portion 13 in which both end portions 9e, 9e of the sound control tool 9 are separated from each other. However, the discontinuity portion 13 can be eliminated by increasing the length of the sound control device 9. In the present embodiment, the sound control tool 9 is provided such that the center of the width thereof substantially coincides with the tire equator C. This is because the weight of the sound control device 9 is uniformly distributed to both sides around the tire equator C, so that it is possible to effectively prevent deterioration of tire uniformity, particularly conicity.

  The above-described sound control device 9 suppresses cavity resonance by converting resonance sound energy (vibration energy) generated in the tire lumen 4 into heat energy. That is, since the resin film portion 11 made of the resin sheet 15 as in the present embodiment allows sound to pass therethrough, vibration waves of air pass through the porous porous sponge material, and a part thereof is consumed as thermal energy. This reduces road noise. In addition, since the sponge material used for the sound control device 9 is easily deformed such as contraction and bending, it does not affect the deterioration of the rim assembly and the steering stability. Further, since the sound control device 9 is provided with a water absorption preventing resin film portion 11 capable of preventing water absorption to the inside on the surface of the band 10 made of a sponge material, the moisture inside the tire 2 is removed from the band. The occurrence of weight imbalance due to the absorption by 10 can be prevented. Therefore, unpleasant vibration does not occur even at high speeds.

  Moreover, in the said embodiment, although the example which adheres the noise suppression tool 9 to the tire 2 using the double-sided adhesive tape 14 was shown, for example, the method of incorporating the noise suppression tool 9 in the tire manufacturing stage, such as at the time of vulcanization molding, Needless to say, various methods such as fixing using an agent can be used. The method of using the double-sided pressure-sensitive adhesive tape 14 is particularly desirable from the viewpoints of cost, stability after bonding, efficiency in attachment work, and the like. Note that a release agent such as silicone oil is often attached to the inner surface of the tire 2 after vulcanization molding, and this may reduce the adhesive strength. It is desirable to remove it.

  Further, the tire 2 is pressed into a mold by a balloon-like bladder that has expanded during vulcanization contacting the inner surface of the tire. Since a large number of exhaust grooves for exhausting air intervening between the inner surface and the tire inner surface are usually formed on the surface of the bladder, the tire inner surface of a general tire corresponds to the exhaust groove. It turns out that many convex parts are arranged in parallel. The tire 2 of the present embodiment is vulcanized and molded using a bladder having a substantially smooth surface in which at least a portion for molding the tread lumen surface 2ti is not provided with an exhaust groove as described above. Are illustrated. For this reason, the tread lumen surface 2ti is finished to be smooth, the adhesion area with the sound control tool 9 can be improved, and the adhesion strength can be further improved.

  In addition, when the convex part is formed in the tread lumen | bore surface 2ti, it is desirable to grind | polish the adhering position of the noise suppression tool 9 and to physically remove a convex part with a mold release agent. Moreover, if it is only a mold release agent, it can remove chemically using an organic solvent. After removing the release agent, it is preferable to further improve the adhesive strength by applying a primer prior to application of the adhesive or application of the adhesive tape. As the primer, those used for the tire 2, for example, synthetic rubber as a main component and toluene, methyl ethyl ketone (MEK), dimethylformamide (DMF) as a solvent are suitable, and those used for the strip 10 are preferable. For example, it is preferable to use synthetic rubber as a main component and toluene, methyl ethyl ketone, and ethyl acetate as solvents.

  Further, as an adhesive for adhering the tire 2 and the sound control tool 9, a synthetic rubber system such as a solution type in which a synthetic rubber is dissolved in an organic solvent and a latex type in which the rubber is dispersed in water is preferable. In particular, a chloroprene-based solution-type adhesive using chloroprene rubber as a synthetic rubber is particularly preferable because it has excellent adhesive strength and is flexible and resistant to bending and impact. Further, as an organic solvent, cyclohexane (alicyclic), acetone (ketone), hexane (aliphatic) or a mixture thereof is preferable from the viewpoint of solubility, workability, cost, influence on working environment, and the like. It is. In this case, the content of the chloroprene rubber is preferably 25 to 35 parts by weight when the total amount of the synthetic rubber adhesive is 100 parts by weight. If it is less than 25 parts by weight, the adhesive strength tends to be impaired, and if it exceeds 35 parts by weight, it tends to be highly viscous and difficult to apply.

  In FIG. 6, the manufacturing method of other embodiment of the noise suppression tool 9 is shown. In this example, the belt-like body 10 is sandwiched between, for example, two upper and lower resin sheets 25A and 25B, and this is inserted into, for example, a mold 26 or the like, and the joint portion of the resin sheets 25A and 25B is integrally heat-sealed. The thing which forms the noise suppression tool 9 is illustrated. Thus, the method for manufacturing the sound control tool 9 is not particularly limited, and various methods can be adopted. In the above-described embodiment, the noise suppression tool 9 is fixed to the inner cavity surface of the tire 2. However, it goes without saying that the noise suppression tool 9 may be fixed to the outer surface 4S2 of the rim body 3a of the rim 3, for example.

  Hereinafter, examples of the present invention and advantages of the effects will be described in detail using specific numerical values. First, the specifications of the examples and comparative examples are as follows.

<Assembly of Example>
A sound control device having the specifications shown in FIG. 3 was fixed to the tread lumen surface of the “195 / 65R15 91S” passenger car radial tire. The tire was assembled on a 15 × 6JJ rim to form a tire assembly (Examples 1 and 2). The resin film part uses a polyethylene food packaging wrap film (Example 1) manufactured by ITOCHU Sampras Co., Ltd. and a polyethylene sheet (Example 2) manufactured by Mitomo Sangyo Co., Ltd. Nitto Denko Co., Ltd. (5000NS) was used to adhere to the band-like body by the method shown in FIGS.

<Assembly of Comparative Example>
The tires and rims are the same as those in Examples 1 and 2, but those having no noise control (Comparative Example 1) and those having only a belt-like body and no resin film (Comparative Example 2) And prepared.

Each strip uses an ether-based polyurethane sponge (product number E16, Marusuzu Co., Ltd.) having a specific gravity of 0.0016, and has a width of 70 mm, a thickness of 30 mm, and a length of 1850 mm, as shown in FIG. Cut sharply at an angle of 45 °. In each example, the total volume of the strips is the same (3822 cm ³ ). The total volume of the tire lumen is 30500 cm ³ and the volume of the strip is 12.5% of the total volume of the tire lumen. The sound control tool and the tire lumen were bonded using the double-sided pressure-sensitive adhesive tape. As for the tires, tires having no bladder convex portions formed on the tread lumen surface were used. Then, noise performance and vibration performance were tested using each of the test assemblies. The test method is as follows.

<Noise performance>
In-vehicle noise when traveling on a road noise measurement road (asphalt rough road) at a speed of 60km / H with one person riding with a rim assembled at an internal pressure of 200kPa and mounted on all wheels of a vehicle (domestic 2000cm ³ FF car) Was measured at the driver's seat window side ear position, and the sound pressure level of the peak value of the air column resonance sound near 240 Hz was shown as an increase / decrease value with reference to Comparative Example 1. -(Minus) display means a reduction in road noise.

<Vibration performance>
The tire was held vertically with the noise control device attached to the inner surface of the tire, and 3000 cm ³ of water was injected into the tire. And let it stand for 1 hour. After that, drain water from the tire as much as possible manually, install it on the rim and mount it on the test vehicle, run around the tire test course at a speed of 100 km / H, and evaluate the presence of vibration based on the driver's sensuality. did.
The test results are shown in Table 1.

  As a result of the test, Examples 1 to 2 and Comparative Example 2 exhibited the same level of noise reduction effect, but Comparative Example 2 generated periodic unpleasant vibration. On the other hand, in Examples 1 and 2, no such vibration was observed.

It is sectional drawing of the assembly of the pneumatic tire and rim | limb of this invention. It is the AA sectional view. It is a principal part expanded sectional view of FIG. (A) to (C) is a perspective view for explaining an example of a manufacturing process of a noise damper. (A) to (C) is a perspective view for explaining an example of a manufacturing process of a noise damper. It is sectional drawing which shows an example of the other manufacturing method of a noise suppression tool. It is a fragmentary sectional view of the tire assembly which shows an example of the conventional noise suppression tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Assembly of pneumatic tire and rim 2 Pneumatic tire 3 Rim 4 Tire lumen 9 Sound control tool 10 Band-shaped body 11 Resin film part 15 Resin sheet

Claims (4)

A pneumatic tire and rim assembly including a rim and a pneumatic tire mounted on the rim,
A sound control tool is fixed in a tire lumen surrounded by the pneumatic tire and the rim,
The sound control device includes a band-shaped body made of a sponge material and extending in the tire circumferential direction, and a water absorption preventing resin film portion disposed on the surface of the band-shaped body and capable of preventing water absorption therein.
And the volume of the said strip | belt shaped object is 0.4 to 20% of the whole volume of the said tire lumen | bore, The assembly of the pneumatic tire and rim | limb characterized by the above-mentioned.   2. The pneumatic tire and rim assembly according to claim 1, wherein the resin film portion is made of a resin sheet fixed to a belt-like body using an adhesive tape or an adhesive.   The pneumatic tire and rim assembly according to claim 1 or 2, wherein the sponge material has a specific gravity of 0.005 to 0.06.   The pneumatic tire and rim assembly according to any one of claims 1 to 3, wherein the belt-like body has substantially the same cross-sectional shape and is continuous in the tire circumferential direction.

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