JP2009279961A - Pneumatic tire with sound suppressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the butting accuracy of end faces, and to manufacture an annular sound suppressor with high quality at low cost. <P>SOLUTION: A pneumatic tire with a sound suppressor 1 is composed of a pneumatic tire 3 and the sound suppressor 7 installed in the tire cavity 5. The sound suppressor 7 is formed annularly by butting together the end faces 12e of a long stretching sponge piece 12 extending along the tire circumferential direction. Further, the butting surface 8 of each end face 12e assumes a curved surface having a meshing part 15 to preclude a dislocation in the width direction which is established through meshing of the end faces 12e with each other by their asperities. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pneumatic tire with a noise suppressor capable of suppressing cavity resonance by a noise suppressor mounted in a tire lumen.

  One type of tire noise is road noise that occurs in a frequency range of about 50 to 400 Hz. This is mainly due to air column resonance (cavity resonance) occurring in the tire lumen. Thus, for example, Patent Document 1 below proposes to reduce road noise by mounting a tire sound control tool made of a sponge body in a tire lumen. This sound control tool is formed in a seamless annular shape and is arranged in a compressed state in the tire lumen.

JP 2005-254924 A

  However, the tire noise control device as described above has a problem in that the manufacturing cost increases because a sponge is required for each tire size in order to form the sponge body into a seamless annular body.

  Therefore, the present invention has been devised in view of the actual situation as described above, and is formed into an annular shape by abutting the end face of a long sponge body in which the sound control device is arranged along the tire circumferential direction, and the abutment is performed. It is possible to improve the accuracy of butting between end surfaces by providing a meshing part that prevents positional deviation in the width direction by engaging the end surfaces in a concave-convex shape on the surface, and manufacturing high-quality, The main purpose is to provide a pneumatic tire with a sound control device that can be performed at low cost.

The invention according to claim 1 of the present invention is equipped with a sound control device comprising a pneumatic tire and an annular sound control device whose outer peripheral surface is in contact with the tire inner cavity surface and whose inner peripheral surface faces the inner side of the tire lumen. A pneumatic tire,
The sound control tool is formed in an annular shape by abutting end surfaces in the length direction of a long sponge body extending along the tire circumferential direction,
In addition, the butted surfaces of the end faces are characterized in that the end faces are engaged with each other in an uneven shape to form a curved surface having a meshing portion that prevents positional deviation in the width direction.

  According to a second aspect of the present invention, the abutting surface has a curved outer end edge where the abutting surface intersects the outer peripheral surface, and the abutting surface is in a thickness direction from the outer peripheral surface toward the inner peripheral surface. Is characterized in that the curved shape of the butt outer edge is substantially maintained.

  According to a third aspect of the present invention, in the longitudinal section of the noise control device, the butted side edge where the butted surface intersects the longitudinal section extends in the tire radial direction.

  According to a fourth aspect of the present invention, the outer edge of the butt has a wavy shape that swings with respect to a center line, and the center line of the wavy line has an angle smaller than 90 ° with respect to the length direction. It is characterized by tilting at θ1.

  According to a fifth aspect of the invention, the abutting surface is displaced at a constant rate to one side in the length direction while substantially maintaining the curved shape of the abutting outer edge in the thickness direction. It is characterized by.

  According to a sixth aspect of the present invention, the abutting surface is displaced at a constant rate to one side in the width direction while substantially maintaining the curved shape of the abutting outer edge in the thickness direction. It is a feature.

  According to a seventh aspect of the present invention, the sound control tool has a display portion on the inner peripheral surface for designating the mounting direction to the tire cavity surface.

  The invention according to claim 8 is characterized in that the noise control device comprises two or more butted surfaces by being formed of a plurality of long sponge bodies.

  In the invention of claim 9, the long sponge body constituting the sound damping tool has a total length larger than the inner circumferential length of the tire lumen before being mounted in the tire lumen. It is said.

  In the present invention, as described above, the sound control device attached to the tire cavity surface is formed in an annular shape by arranging a long sponge body along the tire circumferential direction and abutting the end surfaces thereof. Therefore, for example, a continuously formed flat sponge raw material can be easily formed into an annular shape by using a sponge body cut to a required length and width. As a result, the manufacturing cost can be greatly reduced as compared with the sound control device made of a seamless annular body while maintaining the cavity resonance suppression effect. In addition, the sound control tool is formed as a curved surface having a meshing portion that prevents the positional deviation in the width direction by engaging the end surfaces in a concavo-convex shape as the abutting surface. Therefore, the end faces can be matched with high workability and accuracy, and the quality of the annular sound control tool can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a meridional sectional view showing an embodiment of a pneumatic tire 1 with a sound control device of the present invention, and FIG. 2 is a circumferential sectional view along the tire equator C.

  As shown in FIGS. 1 and 2, the pneumatic tire 1 with a sound control device includes a pneumatic tire 3 (hereinafter simply referred to as “tire 3”) and an outer peripheral surface 7 a on the tire lumen surface 6. The ring-shaped noise control tool 7 is in contact with the inner peripheral surface 7b and faces the inside of the tire lumen.

  The tire 3 includes a toroidal carcass 3d extending from the tread portion 3a through the sidewall portion 3b to the bead core 3f of the bead portion 3c, and a belt layer 3e disposed on the outer side in the tire radial direction. Further, when the tire 3 is mounted on the rim 2, the tire lumen 5 surrounded by the tire lumen surface 6 and the outer surface of the rim is formed. As the tire 3, in this embodiment, a radial tire for a passenger car for which noise reduction is particularly desired is shown.

  As shown in FIGS. 2 and 3, the noise damper 7 is composed of a long sponge body 12 extending along the tire circumferential direction, and the end faces 12 e and 12 e in the length direction Fx are brought into contact with each other. It is formed in an annular shape. The noise damper 7 may be fixed to a tread inner surface 6a which is a tire lumen surface 6 inside the tread portion 3a, and the center of the tire axial width W of the noise damper 7 is the tire equator C. You may adhere to the tread inner surface 6a so that it may correspond substantially.

  3A, the long sponge body 12 includes an outer surface 12a that forms the outer peripheral surface 7a of the sound control tool 7, an inner surface 12b that forms the inner peripheral surface, and both sides of the width direction Fy. It has a side surface 12c and the end surfaces 12e on both sides in the length direction Fx. Further, forming at least the outer surface 12a as a flat surface increases the contact area between the outer surface 12a and the tire lumen surface 6 and increases the mounting stability such as suppressing the positional deviation of the noise damper 7 after mounting. preferable. Further, when the outer surface 12a and the tire lumen surface 6 are fixed with an adhesive, it is preferable that the outer surface 12a and the tire inner surface 6 are formed in a plane from the viewpoint of fixing properties. Also, in this example, the case where the cross section in the width direction of the sponge body 12 perpendicular to the length direction Fx has a horizontally flat rectangular shape is illustrated, but in order to prevent damage due to the tire lever when assembling the rim. It is also preferable that the width W is, for example, a trapezoidal shape that gradually decreases from the outer surface 12a side toward the inner surface 12b side. Since such a sponge body 12 can be easily formed by appropriately cutting a flat sponge raw material in the length direction Fx and the width direction Fy, the manufacturing cost of the sound control device 7 can be greatly reduced. Can do.

  Here, when the end surfaces 12e and 12e are brought into contact with each other and joined, when the end surfaces 12e are flat, the end surfaces 12e are likely to be misaligned in the width direction Fy. As a result, the quality of the noise damper 7 is deteriorated, for example, the abutting accuracy is lowered, and the abutting surface 8 tends to be peeled off starting from the position shift portion.

  Therefore, the abutting surface 8 is formed by a curved surface having a meshing portion 15 that prevents the positional deviation in the width direction by engaging the end surfaces 12e in an uneven shape.

  Specifically, as shown in FIG. 4, the abutting outer edge 20 defined by an intersecting line where the abutting surface 8 intersects the outer peripheral surface 7 a (outer surface 12 a) has a curved shape. Eggplant. Moreover, the butt surface 8 substantially maintains the curved shape of the butt outer edge 20 with respect to the thickness direction Fz from the outer peripheral surface 7a (outer surface 12a) to the inner peripheral surface 7b (inner surface 12b). Is formed. That is, the line of intersection between the arbitrary parallel surface parallel to the outer peripheral surface 7a and the butt surface 8 substantially matches the curved shape of the butt outer edge 20. In other words, the abutting surface 8 has substantially the same contour shape at an arbitrary thickness position. Reference numeral 22 in the figure indicates an intersection line where the butted surface 8 intersects the inner peripheral surface 7b (inner surface 12b), and reference numeral 23 indicates a ridge line passing through the top of the zigzag.

  In this example, a case is shown in which the butt outer edge 20 has a wavy shape that repeats amplitude with the center line i as a reference. In this example, a zigzag shape is exemplified as the wavy line shape, but for example, a rectangular wave shape (shown in FIG. 5A), a wave shape such as a sine wave (shown in FIG. 5B), etc. Can also be suitably employed.

  Thus, by making the butt outer edge 20 into a curved shape such as a wavy line shape, it is possible to form a meshing portion 15 where the end surfaces 12e mesh with each other, prevent positional misalignment in the width direction, Bonding accuracy can be improved. Further, since the contact area between the end faces 12e is increased, it is advantageous for increasing the bonding strength.

  In this example, the case where the center line i of the amplitude is arranged at an angle θ1 of 90 ° with respect to the length direction Fx is illustrated in the wavy shape. However, as shown in FIG. 5C, it is also preferable that the angle θ1 is smaller than 90 ° and the center line i is inclined with respect to the length direction Fx. In this case, the contact area between the end faces 12e is further increased by the inclination of the center line i, which is more advantageous for the bonding strength. However, when the angle θ1 is excessively small, the workability of the matching tends to be lowered. Therefore, the angle θ1 is preferably 30 ° or more, more preferably 45 ° or more, and further preferably 60 ° or more.

  Further, in this example, as shown in FIG. 4, the butt side edge 21 defined by the intersecting line where the butt surface 8 intersects the length direction cross section S in an arbitrary length direction cross section S has a tire radial direction. It is That is, the abutting surface 8 is formed at a right angle to the outer peripheral surface 7a (outer surface 12a). In this case, the end surface 12e can be easily formed by cutting a sponge material at right angles (thickness direction Fz) with the outer surface 12a using a plate-shaped cutting blade bent (or curved) according to the wavy line shape. Since it can form, it is preferable from the viewpoint of the formation efficiency and formation accuracy of the sponge body 12.

  In addition to the wavy line shape, for example, as shown in FIGS. 6A to 6C, various curved lines such as a square shape, an arc shape, and a crank shape are adopted as the curved shape of the butt outer edge 20. be able to.

  Further, in this example, the case where the sound control device 7 is formed from one long sponge body 12 is exemplified. For example, a plurality of sponge bodies 12 having a smaller tire circumferential length are provided. It may be formed as an annular body that is arranged in abutment in the tire circumferential direction and includes two or more abutment surfaces 8. In such an aspect, the sponge body 12 per piece can be reduced in size, and portability and storage property can be improved.

  Next, the sponge body 12 may be, for example, an open-cell and / or closed-cell sponge material obtained by foaming rubber or synthetic resin. Since such a sponge material has high vibration proofing and sound absorbing properties, it can effectively absorb the sound energy generated in the tire lumen 5 and reduce road noise. The sponge material is not particularly limited, but an ether-based polyurethane sponge is preferable from the viewpoints of sound damping, light weight, ease of foaming adjustment, durability, and the like. The specific gravity of the sponge material is preferably 0.005 to 0.060. Such a low specific gravity sponge material can suppress the deterioration of the tire weight and the tire balance and can further improve the sound absorption by increasing the porosity.

  Further, in the long state before the sound damper 7 is mounted on the tire lumen surface 6, the total length thereof is larger than the inner peripheral length of the tire lumen surface 6 to which the noise suppressor 7 is attached. It is desirable. Thereby, the noise suppression tool 7 is mounted on the tire lumen surface 6 in a compressed state. Therefore, as shown in FIG. 2, a radial force F <b> 1 directed toward the tire lumen surface 6 is generated in the noise damper 7, and a circumferential force F <b> 2 that presses the end surfaces 12 e and 12 e against each other at the butting surface 8. Thus, the adhesion between the noise control device 7 and the tire lumen surface 6 can be improved. This is useful for preventing peeling of the sound control tool 7 from the tire lumen surface 6 during transportation or running.

  At this time, when the overall length A (not shown) of the noise control device 7 before being attached to the tire lumen surface 6 becomes significantly larger than the inner circumferential length B (not shown) of the tire lumen surface 6. There is a risk that the sound control tool 7 is excessively compressed and wrinkles or the like are generated. Conversely, if the sound control tool 7 is remarkably reduced, the noise control tool 7 and the tire lumen surface 6 may be reduced and easily come off. From this point of view, the lower limit value of the total length A before mounting the noise control device 7 is more preferably 1.01 times or more the inner peripheral length B of the tire lumen surface 6, and the upper limit value is 1.1 times. Hereinafter, it is more preferably 1.05 times or less.

  Next, the sound damper 7 may have its outer peripheral surface 7 a (outer surface 12 a) fixed to the tire lumen surface 6. As the fixing means, for example, a double-sided tape and / or an adhesive is suitable, and a double-sided tape is particularly desirable from the viewpoint of productivity. As the double-sided tape, one using an acrylic pressure-sensitive adhesive is suitable. The end faces 12e of the sound control device 7 are also preferably joined together using an adhesive. As the adhesive, an isocyanate compound or an isocyanate-terminated prepolymer capable of firmly bonding a sponge material, particularly an ether polyurethane sponge material, is used. What consists of a polymer is desirable. The acrylic pressure-sensitive adhesive described above can also be used.

  Next, another embodiment of the abutting surface 8 is shown in FIG. In FIG. 7, the abutting surface 8 is displaced at a constant rate in one direction in the length direction Fx while substantially maintaining the curved shape of the abutting outer edge 20 in the thickness direction Fz. I am letting. At this time, the ratio of the displacement in the length direction Fx with respect to the thickness direction Fz can be expressed by an angle θ2 of the length direction Fx with respect to the thickness direction Fz. When the curved shape is displaced only in the length direction Fx (not displaced in the width direction Fy), the angle θ2 matches the angle of the butt side edge 21 with respect to the tire radial direction. When the angle θ2 is larger than 0 °, the contact area between the end faces 12e can be increased as compared with the case where the angle θ2 is 0 ° (when the abutting side edge 21 extends in the tire radial direction). This is advantageous for bonding strength.

  Further, by displacing in the length direction Fx, it is possible to suppress damage at the butting surface 8 due to rubbing between the tire lumen surface 6 and the sound control tool 7 due to tire rotation. Here, as shown in FIG. 8A, when the tire 1 rotates in the direction of arrow T, the outer surface 12a of the sponge body 12 in contact with the tire lumen surface 6 is in the same direction as the tire rotation direction T. Pulled by force R. At this time, the corner portion Y1 formed by the end surface 12e and the outer surface 12a of the sponge body 12 positioned on the first arrival side with respect to the tire rotation direction T has an obtuse angle and thus has high rigidity and can maintain its shape without deformation. Further, the corner portion Y2 formed by the end surface 12e of the sponge body 12 on the rear arrival side and the outer surface 12a has an acute angle and the rigidity becomes low, but the corner portion Y2 is pulled toward the abutting surface 8. Therefore, peeling damage at the butt surface 8 can be prevented as compared with the case where the angle θ2 is 0 °. If the angle θ2 is too large, the cutting of the end face 12e becomes complicated, which may increase the manufacturing cost, and it is easy to slip when the end faces 12e are brought into contact with each other. There is a risk that working efficiency will be reduced. From such a viewpoint, the lower limit value of the angle θ2 is preferably 5 ° or more, more preferably 30 ° or more, and the upper limit value is preferably 70 ° or less, more preferably 60 ° or less.

  On the other hand, as shown in FIG. 8B, when the butted surface 8 is inclined toward the rear arrival side with respect to the tire rotation direction T, the corner Y1 on the first arrival side becomes an acute angle and the rigidity is lowered. Therefore, this portion is peeled off from the abutting surface 8 by the force R, and so-called “reverse” tends to occur. Therefore, when displacing in the length direction Fx, the direction of displacement, that is, the direction of inclination of the butt surface 8 is extremely important.

  Therefore, as shown in FIG. 9, it is preferable to provide a display unit 9 for designating the mounting direction to the tire lumen surface 6 on the inner peripheral surface 7 b (inner surface 12 b) of the noise damper 7. The display unit 9 includes a first display unit 10 indicating the tire rotation direction T and a second display unit 11 indicating the inner surface side of the sponge body 12. The first display unit 10 includes, for example, marks such as arrows indicating the rotation direction, and the second display unit 11 includes characters (for example, INSIDE) and patterns indicating the inner surface side. . Such a display unit 9 prevents a mounting error when specifying the direction of the inclination with respect to the tire rotation direction T when the abutting surface 8 is inclined as shown in FIGS. To help. The display unit 9 can be provided not only on the inner surface 12b of the sponge body 12 but also on the outer surface 12a. However, when it is provided on the inner surface 12b as in this example, it is desirable in that it can be easily confirmed after mounting. Moreover, when the display part 9 is made into the solid pattern which consists of unevenness | corrugations, it is desirable at the point which can confirm the display part 9 not only by the naked eye but also by the touch at the time of mounting | wearing. As a method of attaching such a display unit 9 to the sound control tool 7, various methods such as branding, printing, sealing, and / or embossing can be exemplified.

  The display unit 9 is preferably provided in the vicinity area Ta of the butt surface 8. Thus, the operator can easily check the display unit 9 when the end surfaces 12e of the sponge body 12 are brought into contact with each other, and can effectively prevent a mounting error. In particular, as described above, when the display unit 9 is formed of a three-dimensional pattern, the display unit 9 can be quickly confirmed by the touch. The neighboring area Ta is based on an intermediate position between the position of the intersection line 22 where the intersection line 22 is most displaced on one side in the length direction Fx and the position where the intersection line 22 is most displaced on the other side. The region is preferably 40 cm in the tire circumferential direction from the position.

  10 and 11, the butt outer edge 20 is long on the butt surface 8 having a wave shape, a rectangular wave shape, a zigzag shape (center line i is inclined), a square shape, an arc shape, or a crank shape. A displacement in only the vertical direction Fx is illustrated.

  Next, still another embodiment of the abutting surface 8 is shown in FIG. In FIG. 12, the abutting surface 8 is displaced in the thickness direction Fz at a constant rate while maintaining the curved shape of the abutting outer edge 20 substantially at one side in the width direction Fy. ing. At this time, the ratio of the displacement in the width direction Fy with respect to the thickness direction Fz can be expressed by an angle θ3 of the width direction Fy with respect to the thickness direction Fz. When the angle θ3 is larger than 0 °, the contact area between the end faces 12e can be increased as compared with the case where the angle θ3 is 0 °, which is advantageous for the bonding strength. However, if the angle θ3 is too large, cutting of the end surface 12e becomes complicated, which may increase the manufacturing cost, and it becomes easy to slip when the end surfaces 12e are brought into contact with each other. There is a possibility that work efficiency at the time of installation may be lowered. From such a viewpoint, the lower limit value of the angle θ3 is preferably 5 ° or more, more preferably 30 ° or more, and the upper limit value is preferably 70 ° or less, more preferably 60 ° or less.

  As shown in FIG. 13, the abutting surface 8 has a substantially curved shape of the abutting outer edge 20 in the thickness direction Fz, while maintaining the curved shape on one side of the length direction Fx. And it can also be displaced at a fixed rate to one side of the width direction Fy. Also in this case, the ratio of displacement in the length direction Fx (angle θ2) and the ratio of displacement in the width direction Fy (angle θ3) are preferably in the above-described ranges.

  As mentioned above, although the especially preferable form of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

Prototypes of sound control devices with the specifications shown in the table were tested and their performance was tested. In addition, the comparative example 1 is a sound control tool in which the butting surface 8 is a flat surface.
The common specifications are as follows.
Tire size: 215 / 45R17
Rim size: 17 × 7JJ
Internal pressure: 200 kPa
Specifications of sound control equipment, etc. Material: Ether polyurethane sponge ("E16" manufactured by Maruzuru)
Specific gravity: 0.016
Cross-sectional shape: Horizontal rectangular shape with a width of 100 mm × thickness of 20 mm By joining the end faces of the long sponge body in the length direction with a double-sided adhesive tape (“468MP” manufactured by Sumitomo 3M Limited) An annular sound control tool is formed.

  Also, in the table, “forward / reverse of phase direction in the length direction” means that the abutting surface is inclined from the inner surface to the outer surface toward the first arrival side with respect to the tire rotation direction T as shown in FIG. “Positive”, as shown in FIG. 8B, the case of tilting toward the rear arrival side was set to “reverse”.

<Processing time of sound control tool>
The time required to process 10 long sponge bodies into a ring shape was measured. The smaller the value, the higher the processing efficiency and the better.

<Position misalignment in the width direction>
The positional deviation in the width direction between the end faces when the end faces of the sponge bodies were butted and joined to each other was measured with respect to 10 noise suppression tools, and the average values were compared. Smaller numbers are better.

<Durability>
A pneumatic tire with a noise control device having 20 butt surfaces per noise control device is assembled on the rim and 20,000 km on the drum tester under the following conditions. The presence or absence of peeling of the butted surfaces was confirmed with the naked eye, and the number of peeling was confirmed. The smaller the number of peels, the better.
Load: 4.0kN
Travel speed: 100km / h
Drum diameter: 1.7m

<Durability during transportation>
After rolling a pneumatic tire with a sound control device that is not mounted on the rim and rolling it on the truck bed for about 15 meters, drop the tire from the bed again and roll the tire to the original location to stack it flat. did. Then, 30 tires were tested for each example, and the presence or absence of damage such as separation of the noise control device and displacement of the butted surfaces was confirmed. Those without damage were described as “OK”, and those with damage were described with the number.
Table 1 shows the test results.

テストの結果、実施例の制音具付き空気入りタイヤは、制音具の突き合わせ面における位置ズレを抑制しうるとともに、突き合わせ面における接合強度を高めることができ、耐久性を向上しうる。

As a result of the test, the pneumatic tire with a noise control device of the example can suppress the positional deviation on the abutting surface of the noise suppression device, can increase the bonding strength on the abutting surface, and can improve the durability.

It is a meridional section which illustrates one form of a pneumatic tire with a noise control tool. It is the circumferential direction sectional view along the tire equator. (A) is a fragmentary perspective view of a sponge body, (b) is a perspective view of the sound-damping tool which formed it cyclically | annularly. (A) is a perspective view which shows the abutting surface of a noise suppression tool, (b) is the top view, (c) is the side view. (A)-(c) is a 2nd page figure (a top view and a side view) which shows the other example of a butting surface. (A)-(c) is a 2nd page figure (a top view and a side view) which shows the further another example of a butting | matching surface. (A) is a perspective view which shows the butt | matching surface displaced to the length direction, (b) is the top view, (c) is the side view. (A), (b) is sectional drawing explaining the effect of the noise suppression tool with the butt | matching surface of FIG. It is a fragmentary sectional view which shows the sound control tool provided with the display part. (A)-(c) is a 2nd page figure (a top view and a side view) which shows the other example of the butt | matching surface displaced to the length direction. (A)-(c) is a 2nd page figure (a top view and a side view) which shows the further another example of the butt | matching surface displaced to the length direction. (A) is a perspective view showing a butted surface displaced in the width direction, (b) is a plan view thereof, (c) is a side view thereof, and (d) is a front view of the butted surface. (A) is a top view which shows the butt | matching surface displaced to the length direction and the width direction, (b) is the side view, (c) is a front view of a butt | matching surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pneumatic tire with a noise control tool 3 Pneumatic tire 5 Tire lumen 6 Tire inner surface 7 Sound control tool 7a Outer peripheral surface 7b Inner peripheral surface 9 Display part 8 Abutting surface 12 Sponge body 12e End surface 15 Engagement part 20 Butting outer end Edge Fx Length direction Fy Width direction Fz Thickness direction i Center line

Claims (9)

A pneumatic tire with a sound control tool comprising a pneumatic tire and an annular sound control tool whose outer peripheral surface is in contact with the tire lumen surface and whose inner peripheral surface faces the inside of the tire lumen,
The sound control tool is formed in an annular shape by abutting end surfaces in the length direction of a long sponge body extending along the tire circumferential direction,
In addition, the pneumatic tire with a noise control device is characterized in that the abutting surface of the end surfaces is a curved surface having a meshing portion that prevents positional displacement in the width direction when the end surfaces mesh with each other in an uneven shape.   The abutting surface has a curved abutting outer edge where the abutting surface intersects with the outer peripheral surface, and the abutting surface is in the thickness direction from the outer peripheral surface toward the inner peripheral surface. The pneumatic tire with a noise control device according to claim 1, wherein the curved shape is substantially maintained.   3. The pneumatic tire with a noise control device according to claim 2, wherein, in the longitudinal cross section of the noise suppression device, a butt side edge where the abutting surface intersects the length direction cross section extends in a tire radial direction.   The abutting outer edge has a wavy shape that swings with a center line as a reference, and the center line of the wavy shape is inclined at an angle θ1 smaller than 90 ° with respect to the length direction. A pneumatic tire with a noise control device according to claim 2 or 3.   The said abutting surface is displaced to the one side of the said length direction by a fixed ratio, maintaining the curved shape of the said abutting outer edge substantially in the said thickness direction. 4. A pneumatic tire with a noise control device according to 4.   The said abutting surface is displaced to the one side of the said width direction by a fixed ratio, maintaining the curved shape of the said abutting outer edge substantially in the said thickness direction. Or a pneumatic tire with a noise control device according to 5;   The pneumatic tire with a noise control device according to any one of claims 1 to 6, wherein the noise suppression device has a display portion on the inner peripheral surface for designating the mounting direction to the tire lumen surface.   The pneumatic tire with a noise control device according to any one of claims 1 to 7, wherein the noise suppression device includes two or more butted surfaces by being formed of a plurality of long sponge bodies. .   The long sponge body constituting the sound control tool has a total length larger than an inner circumferential length of the tire lumen before being mounted in the tire lumen. A pneumatic tire with a sound control device according to any one of the above.

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