JP6444164B2 - Pneumatic tire and method for manufacturing pneumatic tire - Google Patents

Description

  The present invention relates to a pneumatic tire and a method for manufacturing a pneumatic tire.

  In general, a pneumatic tire is an unvulcanized raw tire formed by bonding a plurality of tire constituent members such as a tread member, a sidewall member, a carcass ply, a bead, a bead filler, and a belt ply on a molding drum. Manufactured by vulcanization molding in a tire molding vulcanization mold. The plurality of tire constituent members constituting the raw tire each have a predetermined thickness. For this reason, when the plurality of tire constituent members are bonded together, stepped portions are easily generated at the end portions of the respective members. Due to the portion, an air pocket is easily generated between the tire constituent members.

  Conventionally, air exhaust grooves are formed in each tire constituent member so as to eliminate air accumulation between the respective tire constituent members, and air is passed outside the air reservoir through the air exhaust grooves by stitching (rolling). Extruding is done. For example, Patent Document 1 discloses forming an air discharge groove extending in a tire radial direction or a tire circumferential direction in a sidewall.

JP 2004-284165 A

  However, Patent Document 1 merely discloses forming the air discharge groove so as to extend in the tire radial direction or the tire circumferential direction, and no special consideration has been given to the arrangement of the air discharge groove. There was room for improvement.

  An object of this invention is to provide the pneumatic tire which can discharge | emit efficiently the air interposed between several tire structural members in the state of a raw tire.

The present invention is a pneumatic tire formed by vulcanizing a raw tire formed by bonding a plurality of tire constituent members, and in an unvulcanized state, at least one of the plurality of tire constituent members Comprises a profile surface facing the other tire component members of the plurality of tire component members, and an air discharge groove formed in the profile surface, and the profile surface is provided at a substantially central portion in the tire radial direction. A first profile surface, and a second profile surface extending in a direction intersecting the first profile surface, which is connected to a side where the stitching tool is moved during stitching in the tire radial direction of the first profile surface. The air discharge groove is formed on the first profile surface, the first air discharge groove is formed on the second profile surface, and the profile is formed. When the surface is viewed from the front, and a second air exhaust groove extending in a direction intersecting the first air exhaust groove, characterized in that.

According to this configuration, by crossing the first air discharge groove and the second air discharge groove, the air pushed into one of the air discharge grooves during stitching is outwardly passed through the other air discharge groove. Can be pushed out. Thereby, the groove volume in the intersection area | region where the 1st air discharge groove and the 2nd air discharge groove crossed can be increased, and air can be discharged | emitted efficiently. In addition, by configuring the air discharge path by intersecting the two air discharge grooves, the degree of freedom in setting the air discharge path can be improved, and a more efficient air discharge path can be easily set. Further, according to this configuration, the air discharge groove can be easily formed over the entire profile surface by forming the air discharge groove for each profile surface.

Before Kisora air discharge groove, Ru Tei is formed on the sidewall member, it is preferable.

  According to this configuration, the above invention can be suitably applied to the sidewall member. In particular, air can be discharged more effectively by intersecting the first air discharge groove and the second air discharge groove in a region where air is likely to be interposed.

  It is preferable that the second air discharge groove is inclined with respect to the tire radial direction.

  According to this configuration, since the groove length of the air discharge groove can be increased as compared with the case where the second air discharge groove is formed in the tire radial direction or the tire width direction, the air accumulation amount can be increased and efficient. The air can be discharged.

  It is preferable that the second air discharge groove is inclined to the opposite side with respect to the rotation direction of the raw tire at the time of stitching as the stitching tool is moved in the direction of stitching.

  According to this configuration, at the time of stitching, the second air discharge groove can be inclined in the pushing direction of the air pushed out by the stitching tool. Thereby, the air between members can be more efficiently discharged.

It is preferable that the second air discharge groove communicates with an edge portion of the second profile surface on the opposite side of the first profile surface in the tire radial direction and does not penetrate in the thickness direction.

  According to this configuration, while forming the air discharge groove, it is possible to prevent a notch that becomes a starting point of a crack from being formed at the edge.

The second air discharge groove is formed in a range of 10% to 25% of a height in the tire radial direction of the tire constituent member from an end portion of the tire constituent member on a side where the stitching tool is moved in the tire radial direction. It is preferable.

  According to this structure, since the 2nd air exhaust groove can be formed in the area | region where air tends to interpose among the adjacent parts between members, air can be discharged | emitted efficiently.

The air discharge groove is formed in the second profile surface, intersects the second air discharge groove, and is opposite to the first profile surface in the tire radial direction. It is preferable to further include a third air discharge groove that communicates with the edge of the first air discharge groove.

  According to this configuration, since the groove volume of the air discharge groove can be further increased, air can be discharged more efficiently.

Further, the invention according to another aspect of the present invention is a method for manufacturing a pneumatic tire obtained by vulcanizing and molding a raw tire formed by bonding a plurality of tire constituent members , and the other tire constituent members the profile surface facing the, including tire components having air discharge groove for discharging air existing between the tire component member outwardly, by bonding a plurality of tire components to form a green tire, the raw tire, in front Kisora air discharge groove rotates in the opposite side with respect to a direction inclined as one proceeds in a direction to move the stitching tool, by pressing said stitching tool, the plurality of tire components air interposed between the prior discharged outward through Kisora air discharge groove, the method comprising the raw tire to vulcanization molding in the tire vulcanization molding mold, the profile surface, data A first profile surface provided substantially at the center in the radial direction and a side of the first profile surface where the stitching tool is moved during stitching in the tire radial direction, intersecting the first profile surface A second profile surface extending in the direction of the air flow, wherein the air discharge groove is formed in the first profile surface and the second profile surface, and the profile surface is viewed from the front. And a second air discharge groove extending in a direction crossing the first air discharge groove .

  According to the pneumatic tire and the method of manufacturing the pneumatic tire according to the present invention, air interposed between a plurality of tire constituent members can be efficiently discharged in the state of a raw tire.

The half sectional view in the meridian of the pneumatic tire concerning one embodiment of the present invention. Sectional drawing which shows each tire structural member bonded together on the shaping drum. The X arrow directional view which looked at the sidewall member from the X arrow directional view of FIG. The enlarged view which expands and shows the IV section of FIG. Sectional drawing in the VV line | wire of FIG. 4 which shows an air discharge groove | channel. The enlarged view similar to FIG. 3 which shows the effect | action which discharges | emits the air at the time of stitching. The enlarged view similar to FIG. 3 which shows the effect | action which discharges | emits the air at the time of stitching. The enlarged view similar to FIG. 3 which shows the effect | action which discharges | emits the air at the time of stitching. The enlarged view similar to FIG. 4 which shows the air discharge groove | channel which concerns on other embodiment. The enlarged view similar to FIG. 4 which shows the air discharge groove | channel which concerns on other embodiment. The X arrow directional view similar to FIG. 3 which shows the air discharge groove | channel which concerns on other embodiment.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In addition, the following description is only illustrations essentially and does not intend restrict | limiting this invention, its application thing, or its use. Further, the drawings are schematic, and the ratio of each dimension is different from the actual one. In the following description, the outer side in the tire width direction refers to the direction away from the tread center, and the inner side in the tire width direction refers to the direction toward the tread center.

  FIG. 1 is a half sectional view in the meridian direction of a pneumatic tire 1 according to an embodiment of the present invention. More specifically, a plurality of tire constituent members are attached on a forming drum (not shown). The formed unvulcanized green tire 10 is shown. FIG. 1 also shows the stitching tool 50 with a two-dot chain line. As shown in FIG. 1, the raw tire 10 includes a plurality of tire constituent members such as a carcass ply 11, a bead member 12, an inner liner 13, a belt ply 14, a reinforcement ply 15, a tread member 16, a sidewall member 17, and the like. Are formed by bonding.

  FIG. 2 shows only one side of the raw tire 10 formed on the shaping drum 3 in the tire width direction. Each member before being shaped by a solid line is shown, and each member being shaped by a two-dot chain line is shown. That is, as shown by a solid line, the raw tire 10 is roughly divided into a cylindrical band body 5 wound on the shaping drum 3 and a bead member 12 disposed on the radially outer side of both side portions of the band body 5. And a tread body 6 disposed outside the band body 5 in the radial direction.

  The band body 5 includes at least an inner liner 13 wound in a cylindrical shape, a carcass ply 11 wound around the outer periphery of the inner liner 13, and sidewall members 17 wound on both sides in the width direction. Is formed. The tread body 6 is formed by winding a belt ply 14, a reinforcing ply 15, and a tread member 16 in order from the inside in the radial direction.

  And in the state where bead member 12 was fixed, width direction central part 5a between a pair of bead members 12 and 12 among band bodies 5 was shaped in the shape of a toroid to the outside of a diameter direction, and the diameter direction The tread body 6 is bonded to the crown portion that bulges outside, thereby forming the tread portion 10a of the raw tire 10.

  Further, in the band body 5, the width direction outer portions 5 b and 5 b of the pair of bead members 12 and 12 are shaped outward in the radial direction and turned up from the outer side in the tire width direction of the bead member 12 toward the inner side. Is done. Thereby, the sidewall member 17 and the carcass ply 11 are folded back from the outer side of the bead member 12 in the tire width direction, and attached to the outer end 16a of the carcass ply 11 and the tread member 16 on the outer side of the tire width direction. A sidewall portion 10b of the green tire 10 is formed.

  The side wall member 17 is bonded in such a manner that the profile surface 20 provided with predetermined irregularities is positioned on the outer peripheral side of the shaping drum 3 in the state of the band body 5 wound in a cylindrical shape. For this reason, when the sidewall member 17 is turned up, the sidewall member 17 is bonded to the profile surface 20 adjacent to the carcass ply 11 and the tread member 16.

  The profile surface 20 is formed in a substantially trapezoidal cross-sectional shape, and includes a center profile surface 21 located at the center in the width direction, a tread side profile surface 22 located at both sides in the width direction, and a bead side profile. Surface 23. The central profile surface 21 has a predetermined thickness so as to realize a desired shape of the sidewall portion 10b. On the other hand, the tread-side profile surface 22 and the bead-side profile surface 23 are formed so that the thickness gradually decreases toward the outer diameter side edge portion 17a or the inner diameter side edge portion 17b.

  The sidewall member 17 is turned up, the tread side profile surface 22 is located on the tread member 16 side, and the bead side profile surface 23 is located on the bead member 12 side. In other words, the tread side profile surface 22 is positioned on the winding end end side when turned up, and the bead side profile surface 23 is positioned on the winding start end side when turned up.

  The profile surface 20 is formed with a plurality of air discharge grooves 30 for discharging air intervening with other tire constituent members (for example, the carcass ply 11, the tread member 16, etc.) adjacent to the profile surface 20. Has been. The air discharge groove 30 includes a plurality of first air discharge grooves 31 formed on the central profile surface 21 and a plurality of second air discharge grooves 32 formed on the tread side profile surface 22.

  The first air discharge groove 31 is formed to have a substantially constant depth with respect to the central profile surface 21, and both ends thereof communicate with the tread side profile surface 22 and the bead side profile surface 23 in the tire radial direction. It extends to. The second air discharge groove 32 is formed at a substantially constant depth with respect to the tread side profile surface 22, and both end portions thereof communicate with the central profile surface 21 and the outer diameter side edge portion 17 a of the sidewall member 17. doing.

  The second air discharge groove 32 is formed in a range of 10% to 25% of the height in the tire radial direction from the outer diameter side edge portion 17a of the sidewall member 17 toward the inner side in the tire radial direction. Accordingly, the second air discharge groove 32 can be disposed in the adjacent portion between the sidewall member 17 and the other tire constituent member, which is particularly prone to air accumulation, and the air in the adjacent portion is discharged to the second air. It can be easily discharged through the groove 32.

  2, the second air discharge groove 32 does not penetrate in the thickness direction of the sidewall member 17 in the outer diameter side edge 17a of the sidewall member 17, as shown in an enlarged view of the outer diameter side edge 17a. It is formed to a depth. As a result, it is possible to prevent a notch portion penetrating in the thickness direction from being formed in the outer diameter side edge portion 17a of the sidewall member 17, and a crack or the like due to the notch portion is generated in the sidewall member 17. Can be prevented.

  FIG. 3 shows an X direction view of the sidewall member 17 as viewed from the X direction arrow in FIG. As shown in FIG. 3, the first air discharge groove 31 and the second air discharge groove 32 intersect and communicate with each other at the joint portion 24 between the central profile surface 21 and the tread side profile surface 22. The first air discharge groove 31 and the second air discharge groove 32 only need to cross each other, and do not need to cross each other at the joint portion 24.

  In FIG. 3, a stitching tool 50 is also shown by a two-dot chain line. While the raw tire 10 is rotated in the tire rotation direction R, the stitching tool 50 is moved from the inner side to the outer side in the tire radial direction. Stitching is performed while moving in the moving direction S and pressing the surface of the raw tire 10, and the air interposed between the tire constituent members is pushed out of the raw tire 10 to press the tire constituent members.

  With reference to FIG. 4, the 1st air exhaust groove 31 and the 2nd air exhaust groove 32 are demonstrated concretely. FIG. 4 is an enlarged view of a portion IV in FIG. 3 and shows an intersecting portion 35 of the first air discharge groove 31 and the second air discharge groove 32. As shown in FIG. 4, the first air discharge groove 31 extends in the tire radial direction, and a plurality of first air discharge grooves 31 are formed substantially in parallel with the groove pitch P1.

  A plurality of second air discharge grooves 32 are formed substantially in parallel at a groove pitch P2 so as to be inclined at an inclination angle A with respect to the tire radial direction. The inclination angle A is set so as to incline in the opposite direction to the tire rotation direction R during stitching as the stitching tool 50 moves in the moving direction S (see FIG. 2), that is, from the inside to the outside in the tire radial direction. Has been.

  The inclination angle A is preferably set to 45 ° to 60 °. The groove pitches P1 and P2 are set to 6 mm to 8 mm, for example. Further, the groove pitches P1 and P2 and the inclination angle A are set so that the plurality of first air discharge grooves 31 and the plurality of second air discharge grooves 32 intersect each other on the profile surface 20 of the sidewall member 17. Yes.

  FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, and is a cross-sectional view of the first air discharge groove 31 and the second air discharge groove 32. As shown in FIG. 5, in this embodiment, the 1st air exhaust groove 31 and the 2nd air exhaust groove 32 are formed in the substantially trapezoid shape. Thereby, at the time of vulcanization molding, the first air discharge groove 31 and the second air discharge groove 32 are easily closed from the groove bottom side, and the first air discharge groove 31 and the second air discharge groove 32 are easily disappeared, and vulcanization is performed. Air is prevented from remaining in the later pneumatic tire. The groove width W of the first air discharge groove 31 and the second air discharge groove 32 is preferably 0.1 mm to 0.5 mm, and the groove depth D is preferably 0.1 mm to 0.3 mm. ing.

  In addition, the cross-sectional shape of the 1st air exhaust groove 31 and the 2nd air exhaust groove 32 is not restricted to trapezoid shape, For example, you may form in a triangle shape and may form in a semicircle. That is, the cross-sectional shapes of the first air discharge groove 31 and the second air discharge groove 32 may be formed so that the groove width becomes narrower from the opening side toward the groove bottom side, and various groove shapes can be adopted. .

  Next, a method for manufacturing the pneumatic tire 1 from the raw tire 10 described above will be described.

  First, as shown in FIG. 2, the band body 5 is arranged on the shaping drum 3 and a pair of the band body 5 is formed on the outer side in the radial direction between the central portion 5 in the width direction and the outer portions 5 b and 5 b in the width direction. The bead members 12 and 12 are disposed, and the tread body 6 is disposed on the outer side in the radial direction of the central portion 5 a in the width direction of the band body 5. From this state, the green tire 10 is formed by shaping the band body 5 as described above. (Raw tire formation step).

  At this time, an air pocket tends to be generated between the tire constituent members. Specifically, as shown in FIG. 1, when the tread member 16 is attached on the carcass ply 11 shaped in a toroid shape, the tread member 16 is caused by the outer end 16 a on the outer side in the tire width direction. The step 41 is formed, and the side wall member 17 is further turned up and pasted, whereby an air pocket 42 caused by the step 41 is generated. For this reason, in order to eliminate the air pocket 42, stitching is performed next (stitching step).

  FIGS. 6A to 6C sequentially show the action of pushing out air from the air reservoir 42 (see FIG. 1) during stitching, and show the areas stitched earlier by hatching. First, referring to FIG. 6A, while rotating the raw tire 10 in the tire rotation direction R, the stitching tool 50 is moved in the movement direction S from the inner side to the outer side in the tire radial direction while pressing the surface of the raw tire 10. Let The moving speed of the stitching tool 50 in the tire radial direction is set so that the circumferential trajectory pressing on the surface of the raw tire 10 overlaps with a predetermined pitch in each of the front and rear laps. Stitching is performed over substantially the entire surface of the sidewall member 17 from the inside to the outside in the tire radial direction.

  First, the air interposed between the sidewall member 17 and other tire constituent members (for example, the carcass ply 11 and / or the tread member 16) is mainly pushed out to the first air discharge groove 31 by the stitching tool 50. It is. Since the first air discharge groove 31 extends in the tire radial direction, air can be pushed out toward the outside in the tire radial direction at the shortest distance.

  Next, as shown in FIG. 6B, the air discharged to the first air discharge groove 31 is guided to the second air discharge groove 32 communicating with the first air discharge groove 31 at the intersection 35. That is, the air discharge path is changed from the first air discharge groove 31 to the second air discharge groove. Next, as shown in FIG. 6C, the air is pushed out of the raw tire 10 along the second air discharge groove 32.

  That is, since the first air discharge groove 31 extends in the tire radial direction, the first air discharge groove 31 can be guided outward in the tire radial direction at the shortest distance and discharged to the second air discharge groove communicated at the intersection 35. it can. Further, the 2 air discharge groove 32 is inclined to the opposite side with respect to the tire rotation direction R at the time of stitching as the stitching tool 50 moves in the moving direction S, that is, from the inner side to the outer side in the tire radial direction. The second air discharge groove 32 is inclined in the direction in which air is pushed out by the stitching tool 50. As a result, air can be more efficiently discharged from the second air discharge groove 32 during stitching.

  In this way, air in which the interposition of air between the tire constituent members is suppressed by vulcanizing and molding the raw tire 10 subjected to stitching in a tire vulcanization mold (not shown). An inset tire is manufactured (vulcanization molding step).

  According to the raw tire described above, the following effects can be exhibited.

  By connecting the first air discharge groove 31 and the second air discharge groove 32 to each other at the intersection portion 35, the air pushed into the first air discharge groove 31 at the time of stitching is transferred to the second air discharge groove 32. It can be pushed out through. Thereby, the groove volume in the intersection area | region where the 1st air discharge groove 31 and the 2nd air discharge groove 32 crossed can be increased, and air can be discharged | emitted efficiently. In addition, by configuring the air discharge path by intersecting the two air discharge grooves, the degree of freedom in setting the air discharge path can be improved, and a more efficient air discharge path can be easily set.

  The first air discharge groove 31 and the second air discharge groove 32 intersect each other in the region where the end portion on the outer diameter side in the radial direction of the sidewall member 17 is adjacent to other tire constituent members, particularly in a region where air accumulation is likely to occur. By doing so, air can be discharged more effectively.

  Since the second air discharge groove 32 is inclined with respect to the tire radial direction, the air discharge groove is provided in the tire radial direction, particularly in the radial outer region of the sidewall member 17 where air accumulation easily occurs. Since the air discharge path of the second air discharge groove 32 can be lengthened, the amount of air accumulated can be increased and air can be discharged efficiently.

  Since the second air discharge groove 32 is inclined to the opposite side to the tire rotation direction R at the time of stitching as it proceeds in the moving direction S of the stitching tool 50, it is pushed out by the stitching tool 50 at the time of stitching. The second air discharge groove 32 extends in the air pushing direction. Thereby, at the time of stitching, the air intervening between the sidewall member 17 and other tire constituent members can be more efficiently discharged.

  Since the first air discharge groove 31 is formed in the central profile surface 21 and the second air discharge groove 32 is formed in the tread side profile surface 22, the air discharge groove has a substantially constant depth for each profile surface. Easy to form individually. In addition, since the first air discharge groove 31 and the second air discharge groove 32 that are individually formed intersect each other, both the discharge grooves as in the case where the first air discharge groove and the second air discharge groove are provided in parallel are provided. Therefore, the first air discharge groove 31 and the second air discharge groove 32 can be easily intersected. Thereby, the air discharge path communicating with the outer diameter side edge portion 17a can be easily configured while dividing the air discharge groove 30.

  In the above embodiment, the second air discharge groove 32 is composed of a plurality of air discharge grooves that are inclined with respect to the tire radial direction and extend substantially in parallel. However, as shown in FIG. A third air discharge groove 33 that intersects at least the second air discharge groove 32 and communicates with the outer diameter side edge 17a of the sidewall member 17 may be provided. Thereby, the air pushed out to the first air discharge groove 31 can be dispersed in the second air discharge groove 32 and the third air discharge groove 33 and pushed out of the tire. Thereby, the air discharge path can be increased and air can be discharged more efficiently.

  In the said embodiment, although the 1st air exhaust groove 31 and the 2nd air exhaust groove 32 were comprised by linear form, as shown in FIG. 8, you may form the 2nd air exhaust groove 32 in circular arc shape, for example. As a result, the air discharge path of the second air discharge groove 32 can be lengthened, and the amount of accumulated air can be further increased. Moreover, what is necessary is just to form so that the 1st air exhaust groove 31 and the 2nd air exhaust groove 32 may cross | intersect, Although illustration is abbreviate | omitted, you may form the 1st air exhaust groove 31 on a circular arc, and 1st air exhaust Both the groove 31 and the second air discharge groove 32 may be formed on an arc.

  In the above embodiment, the case where the second air discharge groove 32 is formed in the tread side profile surface 22 has been described as an example. However, as shown in FIG. 9, the fourth air discharge groove 34 is formed in the bead side profile surface 23. May be formed. In this case, the fourth air discharge groove 34 can be easily communicated with the first air discharge groove 31 by inclining the fourth air discharge groove 34 with respect to the tire radial direction. Similarly to the second air discharge groove 32, the fourth air is pushed in the pushing direction of the air at the time of stitching by inclining to the opposite side of the direction R in which the tire is rotated as the stitching tool 50 is moved in the moving direction. The discharge groove 34 can be inclined, and thereby the air discharge performance can be further improved.

  Further, in the above-described embodiment, the case where the stitching tool 50 is moved from the inner side to the outer side in the tire radial direction to perform the stitching is described as an example. The present invention can also be applied when moving from the outside to the inside in the direction. In this case, each air discharge groove may be inclined to the opposite side with respect to the tire rotation direction at the time of stitching as it proceeds from the outside in the tire radial direction to the inside in the direction in which the stitching tool 50 is moved.

  Moreover, in the said embodiment, although the case where the air exhaust groove 30 was formed in the sidewall member 17 was demonstrated as an example, it is not restricted to this, For example, the air exhaust groove is provided in the adjacent surface of the tread member 16 with another tire structural member. 30 may be formed.

DESCRIPTION OF SYMBOLS 3 Shaping drum 5 Band body 6 Tread body 10 Raw tire 11 Carcass ply 12 Bead member 13 Inner liner 14 Belt ply 15 Reinforcement ply 16 Tread member 17 Side wall member 20 Profile surface 21 Central profile surface 22 Tread side profile surface 23 Bead side profile Surface 24 Junction 30 Air discharge groove 31 First air discharge groove 32 Second air discharge groove 33 Third air discharge groove 34 Fourth air discharge groove 35 Intersection 41 Step 42 Air reservoir 50 Stitching tool

Claims (8)

A raw tire formed by laminating a plurality of tire constituent members, is a pneumatic tire formed by vulcanization molding,
In an unvulcanized state, at least one of the plurality of tire components is
A profile surface facing the other tire constituent member of the plurality of tire constituent members;
An air discharge groove formed in the profile surface;
With
The profile surface is
A first profile surface provided at a substantially central portion in the tire radial direction;
A second profile surface extending in a direction intersecting the first profile surface, the second profile surface being connected to a side where a stitching tool is moved during stitching in the tire radial direction of the first profile surface;
With
The air discharge groove is
A first air discharge groove formed in the first profile surface;
A pneumatic tire , comprising: a second air discharge groove formed on the second profile surface and extending in a direction intersecting with the first air discharge groove when the profile surface is viewed from the front . Before Kisora air discharge groove, Ru Tei is formed on the sidewall member, the pneumatic tire according to claim 1. It said second air exhaust groove, with respect to the tire radial direction, are inclined, the pneumatic tire according to claim 1 or 2. Said second air exhaust groove, as one proceeds in a direction to move the stitching tool during stitching is inclined opposite to the rotational direction of the raw tire at the stitching, claims 1 to 3 The pneumatic tire according to any one of the above. The second air discharge groove communicates with an edge of the second profile surface opposite to the first profile surface in the tire radial direction, and does not penetrate in the thickness direction . A pneumatic tire given in any 1 paragraph . The second air discharge groove is formed in a range of 10% to 25% of a height in the tire radial direction of the tire constituent member from an end portion of the tire constituent member on a side where the stitching tool is moved in the tire radial direction. The pneumatic tire according to any one of claims 1 to 5 . The air discharge groove is formed in the second profile surface, intersects the second air discharge groove, and is opposite to the first profile surface in the tire radial direction. The pneumatic tire according to any one of claims 1 to 6 , further comprising a third air discharge groove that communicates with an edge of the tire. A method for producing a pneumatic tire obtained by vulcanization molding a raw tire formed by bonding a plurality of tire constituent members ,
The profile surface facing the other tire components, including tire components having air discharge groove for discharging air existing between the tire component member outwardly, by bonding a plurality of tire components Raw Forming a tire,
The raw tire, in front Kisora air discharge groove rotates in the opposite side with respect to a direction inclined as one proceeds in a direction to move the stitching tool, by pressing said stitching tool, the plurality of tire components air interposed between the prior discharged outward through Kisora gas discharge groove,
Vulcanizing and molding the green tire in a tire vulcanization mold ,
The profile surface is
A first profile surface provided at a substantially central portion in the tire radial direction;
A second profile surface extending in a direction intersecting the first profile surface, the second profile surface being connected to a side where the stitching tool is moved during stitching in the tire radial direction of the first profile surface;
With
The air discharge groove is
A first air discharge groove formed in the first profile surface;
A method for manufacturing a pneumatic tire , comprising: a second air discharge groove formed in the second profile surface and extending in a direction intersecting the first air discharge groove when the profile surface is viewed from the front .

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