JP5929009B2 - Pneumatic tire - Google Patents

Description

  The present invention relates to a pneumatic tire, and more particularly to a pneumatic tire that realizes a novel method of attaching an object to the inner surface of a pneumatic tire.

  In recent years, various investigations have been made to arrange objects having various functions on the inner surface of a pneumatic tire.

  For example, a mounting method of attaching a tire tag (high frequency identification tag) or a chip using a so-called hook-and-loop fastener such as a hook-and-loop fastener or a hook-and-hook fastener to an inner liner of a raw tire Has been proposed (Patent Document 1).

  Further, a pneumatic tire is proposed in which a surface fastener is vulcanized and bonded to a region corresponding to a tread portion on the tire inner surface, and a sound absorbing material is attached to the tire inner surface via the surface fastener (Patent Document 2). ).

  These surface fasteners proposed in Patent Documents 1 and 2 achieve a relatively strong engagement force at the time of mounting, and also have a surface shape without causing a problem of some positional deviation at the time of mounting work. This is preferable in that the engagement can be realized.

On the other hand, the hook-and-loop fasteners proposed in these patent documents are ideal in the engagement state of the individual engaging elements of the hook-and-loop fastener because the inner peripheral surface of the pneumatic tire is an annular curved surface. Not part of it, but part of it floats at the end, center, etc., resulting in variations in the magnitude of the resulting engagement force (positional variation within the tire, variation between tires) In some cases, the expected engagement force could not be obtained. In addition, surface fasteners caused by the occurrence of partial physical deterioration and its progress by repeated deformation and compression due to rolling at high speed under relatively high temperature conditions for a long time. occurs over time degradation, reduction of the overall engaging force, in some cases it is difficult to maintain over a long period of time the desired engaging force.

  In view of such a point, the inventors of the present invention first have a particularly large engagement force and a variation in the magnitude (positional variation within the tire, variation between tires). There is almost no deterioration and decrease over time in the engagement force due to severe use conditions in which deformation and compression accompanying tire rolling at a relatively high temperature and high speed are repeated for a long time. As a pneumatic tire that can maintain a desired engagement force over a wide range, a pneumatic tire having one of a pair of mechanical fasteners that can be separated into two on the tire inner surface has been proposed (Japanese Patent Application No. 2010-167839). .

Here, the mechanical fastener is a pair of fasteners that can be separated into two fasteners and can be physically engaged again, and this engagement and separation can be freely repeated. It consists of fasteners. Typical examples are mechanical fasteners called hooks or snaps, which are generally used in the clothing industry, and more specifically, snap buttons, ring snaps, ring hooks, American snaps, American hooks, eyelet hooks, spring hooks. And the so-called “surface fastener” in which the area of the engagement portion is infinite in all areas, and the engagement portion has a small area (for example, preferably about 1 to 115 mm ^2). Etc., more preferably about 4 to 90 mm ² ). That is, for example, even engagement in a small area of about 1 to 115 mm ² or the like means that strong engagement is achieved by a mechanical male and female structure or the like, which may be of a known structure. The material is made of metal, rubber, synthetic resin or the like. This method using the mechanical fastener is excellent in terms of the magnitude of the engagement force to be obtained, the variation in the magnitude, the certainty of the engagement work, and the like.

  FIG. 7 shows a state in which one fastener of the one mechanical fastener is attached to the tire inner peripheral surface. In FIG. 7, one fastener 3 of a pair of mechanical fasteners that can be separated into two fasteners is disposed on the tire inner surface 2 of the pneumatic tire 1. 4 is a tread portion, 5 is a sidewall portion, and 6 is a bead portion.

  Regarding the attachment method for providing one fastener 3 on the inner surface of the tire, the present inventors have proposed that the fasteners 3 are embedded one by one in the tread rubber and vulcanized.

  However, this method has a problem that the mounting strength may be insufficient depending on the shape of the fastener, and as a result, the durability of the tire decreases. In addition, since it is necessary to arrange the fasteners 3 one by one, it is necessary to take a special method in order to ensure the accuracy of the installation position, and there is a problem that costs are increased. It was.

JP 2005-517581 A JP 2006-44503 A

  The object of the present invention is to solve the above-mentioned problems on the durability of a pneumatic tire under the high mounting strength, without the problem of mounting strength, in view of the above points. A pneumatic tire in which one of the mechanical fasteners is arranged on the inner surface of the tire with high accuracy without incurring any other special technique for improving the accuracy of the mounting position. Is to provide.

The pneumatic tire of the present invention that achieves the above-described object has the following configuration (1).
(1) A pneumatic tire provided with one of a pair of mechanical fasteners made of hooks or snaps that can be separated into two on the tire inner surface, the mechanical fastener made of the hooks or snaps Is installed in a tape-like member made of woven or non-woven fabric, and the ratio of the width Ws of the tape-like member and the width Wh of the fastener is 1.2 or more and 5.0 or less, and the tape-like member is a tire. A pneumatic tire characterized by being fixed to the inner surface along the circumferential direction of the tire.

Moreover, in the pneumatic tire of the present invention, it is preferable that the pneumatic tire has any one of the following configurations (2) to ( 5 ).
(2) The pneumatic tire according to (1) , wherein the tape-shaped member has elasticity.
(3) The tape-shaped member is made of a woven fabric or a nonwoven fabric made of fiber, and has an adhesive layer on at least a surface to be bonded to the tire body, as described in (1) or (2) above Pneumatic tire.
(4) above the object with the other fastener that engages with the one fastener in the inner surface of the tire, characterized in that it is fixed to the tire inner surface in a state where the engaging their two fasteners The pneumatic tire according to any one of (1) to ( 3 ).
( 5 ) The object having the other fastener is (a) an electronic circuit including a sensor, (b) a balance weight, (c) a run-flat core, (d) an oxygen scavenger, a desiccant and / or an ultraviolet ray detection. The air described in ( 4 ) above, which is an object coated or mounted with a color former, (e) a sound absorbing material, (f) a hook-and-loop fastener member, or an object obtained by combining a plurality of them. Enter tire.

  According to the first aspect of the present invention, there is no problem of attachment strength, high attachment strength, therefore, no problem on the durability of the pneumatic tire is caused, and the accuracy of the attachment position is improved. Other special methods for improving the performance are not necessary, and a pneumatic tire in which one of the mechanical fasteners is arranged on the tire inner surface with high accuracy is realized.

  According to this invention concerning Claim 2, the pneumatic tire excellent in the workability | operativity at the time of attaching the tape-shaped member with a fastener to a tire inner surface is provided.

According to this invention concerning Claim 3 , the pneumatic tire excellent in the workability | operativity at the time of attaching the tape-shaped member with a fastener to a tire inner surface is provided.

According to the present invention according to claim 4 or claim 5 , a novel pneumatic tire is provided in which an object having a desired function is attached to the tire inner surface while realizing a large engagement force and excellent durability. Is.

1 is a partially sectional perspective view showing an embodiment of a pneumatic tire of the present invention. (A), (b) is for demonstrating the typical shape of one fastener of the mechanical fasteners which can be isolate | separated into two used for the pneumatic tire of this invention, Furthermore, It is an external perspective model figure explaining that (one fastener) is comprised from two members, (c) is two members of the one fastener, with a tape-shaped member in the middle It is an external appearance perspective model figure explaining the state to interpose and mutually engage. It is the principal part top view which showed typically the width Ws of the tape-shaped member prescribed | regulated by this invention, and the width Wh of a fastener. (A) is a model cross-sectional view illustrating a state in which the fastener is attached to the tape-like member, and (b) is a model cross-section illustrating a state in which the tape-like member with the fastener shown in (a) is fixed to the tire inner surface. FIG. (A)-(e) is the partial cross section perspective view which showed the various example of arrangement | positioning of the tape-shaped member with a fastener as one Embodiment of the pneumatic tire of this invention. (A)-(d) is a schematic sectional drawing explaining the object attached to the pneumatic tire of this invention via a mechanical fastener model-wise. It is the partial cross section perspective view which showed the pneumatic tire with a fastener which the present inventors proposed previously.

  Hereinafter, the pneumatic tire of the present invention will be described in more detail.

  The pneumatic tire of the present invention has one of a pair of mechanical fasteners that can be separated into two on the tire inner surface 2 of the pneumatic tire 1 as shown in FIG. In the pneumatic tire having 3, the mechanical fastener 3 is installed on a tape-like member 7 made of a woven fabric or a nonwoven fabric made of fiber, and the ratio of the width Ws of the tape-like member and the width Wh of the fastener ( Ws / Wh) is 1.2 or more and 5.0 or less, and the tape-like member is fixed to the tire inner surface along the tire circumferential direction.

  Here, the mechanical fastener is exactly the same as described in the background section, can be separated into two fasteners, and they can be physically engaged again, It is composed of a pair of fasteners that can be freely engaged and separated repeatedly. A typical example is a mechanical fastener called a hook or snap.

  In the present invention, one of the pair of mechanical fasteners separable into the two fasteners 3 is not directly embedded in the tire, but provided as a tape-like member 7 made of a woven fabric or a nonwoven fabric made of fibers. The tape-shaped member is fixed to the inner surface of the tire along the circumferential direction of the tire so as to be provided on the inner surface of the tire. When the fastener 3 is provided in this way, the attachment strength of the mechanical fastener can be greatly improved and the attachment durability of the fastener can be improved as compared with the case where it is directly embedded in the rubber layer on the tire inner surface. . In particular, when a fastener is installed on the carcass layer or the inner liner layer as in the invention of the prior application described in the background art section, the performance of the carcass layer or the inner liner layer may be affected, and the tire durability may be reduced. In the present invention, since the fastener is provided on the tape-like member, the performance of the carcass layer and the inner liner layer is hardly affected. Further, during the vulcanization process of the tire, the rubber of the tire is impregnated between the fibers of the tape-like member, and the adhesion and joining between the tire inner surface and the tape-like member and thus the fastener is made stronger. In addition, since the fastener is installed on the tape-like member, the attachment work is simple, and the attachment position can be attached with higher accuracy by marking the tape-like member. There is also an advantage.

  Since the pneumatic tire of the present invention can be attached to the inner surface of the pneumatic tire by engaging the object desired to be attached via a pair of mechanical fasteners, the engagement force obtained physically is large, In addition, there is no variation in the magnitude of the engagement force (positional variation within the tire; variation between tires), and the engagement force is not changed over time even under severe use conditions that are repeated for a long time. Deterioration and reduction are less likely to occur. Therefore, it is possible to maintain a desired engagement force for a long period of time, and to exhibit the function of the object attached to the inner surface for a long period of time.

  Furthermore, the positioning of the engagement position (engagement point) between the tire inner surface and the mounting object is automatically and accurately performed in accordance with the installation position of the fastener on the tire inner surface. It is possible to easily cope with cases where a high degree of accuracy is required. This is significant because it is in a narrow curved surface of the tire inner surface. Further, compared with the case of the hook-and-loop fastener, the engagement force is large, and the decrease / deterioration of the engagement force with time is small, and the engagement state can be maintained accurately and firmly for a long time.

  And as for the installation position of the fastener on the inner surface of the tire, the position of the fastener can be installed accurately and accurately as desired by fixing the fixing position of the tape-like member accurately and accurately as desired.

Since the function / action of the tape-shaped member is mainly to install a fastener, as shown in FIGS. 1 and 3, the width Wh of the fastener 3 and the width of the tape-shaped member 7 made of woven or non-woven fabric. It is important that the Ws ratio (Ws / Wh) is 1.2 or more and 5.0 or less, and the width Ws of the tape-like member 7 is not increased more than necessary. When the value of Ws / Wh is less than 1.2, the bonding force between the tire inner surface and the tape-shaped member is not preferable because the size of the fastener (width Wh) is reduced. The size (width) Wh of the fastener is the width excluding the overlap when there are a plurality of rows ((b) of FIG. 3). The ratio (Ws / Wh) between the width Wh of the fastener 3 and the width Ws of the tape-like member 7 is preferably 1.5 or more and 3.5 or less in terms of ease of work and bonding force. The thickness of the tape-like member 7 is preferably 0.01 to 3.0 mm in terms of ease of work and bonding strength. The tape-like member 7 may be rubberized in advance. The tape-like member 7 is preferably a woven or non-woven fabric made of long fibers (filament fibers) of chemical fibers or synthetic fibers from the viewpoint of high physical properties and quality stability. Among these, the basis weight is 20 to 300 g / m ^2. A plain woven fabric, spunbonded nonwoven fabric, non-woven fabric by flash spinning, melt blown nonwoven fabric, etc. can be particularly preferably used from the viewpoint of high strength and high durability. The range of the basis weight described above is particularly preferable because rubber (or adhesive layer or the like) is easily impregnated between fibers or yarns while ensuring the above-mentioned mounting durability, and a strong vulcanized bond is easily obtained. A more preferable basis weight is 30 to 200 g / m ² . The fiber is preferably a chemical fiber or a synthetic fiber such as rayon fiber, nylon fiber, polyester fiber, polyethylene fiber or the like because it can be stably obtained with high quality.

  As shown in FIG. 1, when a plurality of fasteners 3 are installed on the tape-like member 7, it is preferable to install them on the tape-like member at equal intervals, so that they are installed at equal intervals on the tire inner surface. Can be realized easily and accurately.

  The tape-like member provided with the fastener may be fixed by crimping the tape-like member to the inner surface of the green tire before vulcanization, or may be wound on a molding drum, or the inner surface of the tire may be The inner liner layer of the formed tire may be bonded and pressed in advance at the material stage, or may be formed on the inner liner layer by pre-assy molding.

  In order to fix the tape-shaped member (fixing before the vulcanization step), any method may be used, for example, an adhesive or a pressure-sensitive adhesive may be used. That is, it is preferable that the tape-shaped member has an adhesive layer or an adhesive layer on at least the surface to be bonded to the tire body. If these layers are present, tackiness with the inner liner layer (inner liner material) of the tape-like member is improved, and workability is improved. The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is not particularly limited as long as it can improve tackiness, but a resin-made one, a rubber-made one, etc. can be preferably used.

The tape-shaped member is preferably one having elasticity. In particular, when a pneumatic tire according to the present invention is manufactured by being wound around a forming drum, it is preferable that winding is facilitated if there is an appropriate stretchability. From such a viewpoint, the tape-like member preferably has a tensile modulus in the length direction of 30 to 1200 kPa, and preferably has an elongation at break of 40 to 800% (JiSK6251). If the tensile modulus and elongation at break are smaller than this range, the handleability (handling property) of the tape-shaped member is poor. On the other hand, if it is larger than this range, it may fall off when the tire is inflated.
The method of fixing the tape-like member to the tire inner surface in the tire product is preferably a method by vulcanization adhesion, and the method of fixing one of the pair of mechanical fasteners to the tape-like member is It is preferable that one of the fasteners is formed by sandwiching the tape-like member from the front and back, and at the same time, the tape-like member is also fixed to the tape-like member.

  2 (a) and 2 (b) show a state in which one fastener 3 of a pair of mechanical fasteners is disassembled, and the one fastener 3 is formed from at least two members 3a and 3b. As shown in FIG. 2C, the two members are preferably fixed with the tape-like member 7 sandwiched from the front and back to form one fastener 3.

  These two members 3a and 3b are integrally fixed to form one fastener 3 of the pair of mechanical fasteners. As shown in the sectional view of FIG. 7 is fixed. As shown in the sectional view of FIG. 4B, the tape-like member 7 is fixed to the tire inner surface 2 by vulcanization adhesion with the fastener 3 fixed. 8 is an inner liner layer.

  The fastener 3 is not particularly limited, but the height H of the portion that protrudes most from the tape-like member 7 is 0 mm to 3.5 mm, and the outer diameter of the portion that is exposed inside the tire. It is preferable that D is 4 mm to 12 mm. The height H of the portion most protruding from the surface of the tape-like member 7 and the outer diameter D of the portion exposed inside the tire are as shown in the model in FIG. 4A, and the height H is 3 If it is larger than 5 mm, the carcass or the belt structure may be distorted by being pushed through the tape-like member 7 to the side of the member 3a or 3b of the fastener due to the pressure during tire vulcanization. In addition, when the outer diameter D is less than 4 mm, the angle with respect to the inner surface of the tire is not stable when the tire is vulcanized, and it is difficult to install the bottom surface of the fastener 3 parallel to the inner peripheral surface of the tire. Absent. When the outer diameter D is larger than 12 mm, it is difficult to follow the deformation / recovery of the tire inner surface at the time of rolling of the tire, and a failure is likely to occur. When the fastener 3 having such dimensions is used, the material is preferably made of metal or synthetic resin (particularly preferably nylon or polyester) because it is easy to mold and process.

  Of the members of the fastener 3, it is preferable that the member 3 b in contact with the tire inner surface is flat on the side joined to the tire inner surface because the fastener 3 can be more stably fixed.

  In the present invention, it is preferable that at least two fasteners 3 are installed on the tire inner surface on the tire inner surface, and are arranged in one or more rows whose installation positions are substantially the same in the tire width direction. . The typical example of the form was shown to Fig.5 (a)-(d). (A) is one row at the center, (b) is one row near both tread ends, (c) is two parallel rows provided only near one tread end, (d) is one row This is an example of two rows in which the phase shift is shifted as in a staggered arrangement provided only in the vicinity of the tread edge of the.

  As shown in these drawings, the fastener 3 may have any number of rows. In the tape-like member 7, the ratio (Ws / Wh) of the width Wh of the fastener 3 and the width Ws of the tape-like member 7 is suitably 1.2 or more and 5.0 or less, corresponding to the row of the fasteners 3. It may be arranged so as to satisfy.

  Moreover, the area | region which installs the fastener 3 should just be the inner surface of a tire, and it respond | corresponds to the function of the object attached, the area | region corresponding to the tread part 4, the area | region corresponding to the sidewall part 5, and also the bead part 6 It may be provided in any of the areas corresponding to. According to the knowledge of the present inventors, it is preferable that the number of rows in which the fasteners 3 are provided is two or more, and that the installation region is practically a region corresponding to the tread portion or a region corresponding to the bead portion. .

  FIG. 5E shows a model in which the fastener 3 is provided in a region corresponding to the bead portion 6 in particular. When it is desired to provide the fastener 3 on the bead portion 6, it is particularly effective to install it via the tape-like member 7 as in the present invention. As the tire rotates, a centrifugal force will be applied to the fastener with a component in the direction that will try to tear off the attached object. This is because the invention is effective.

  When the fastener 3 is provided in two or more rows, the interval between the rows is preferably 150 mm or less, and the lower limit thereof is preferably about 20 mm to 30 mm. However, depending on the properties of the object having a desired function attached to the inner surface of the tire, the preferable size of the interval between rows, the pitch, the number of rows, and the like should be changed.

  The row of the fasteners 3 and the tape-like member 7 do not need to be continuously present over the entire circumference in the circumferential direction, and may be interrupted.

  In addition, when installing the fastener 3 on the inner surface of a tire having a low flatness such as a flatness ratio of 45 or less, it is preferable to provide an installation position in a region other than the vicinity of the tread center (equatorial part). When the fastener 3 is arranged near the tread center (equatorial part) and an object is attached to the position, when the tire is completely fitted to the wheel at the final stage of assembling the rim, This is because the possibility that the object is buffered is high, and in order to avoid this, it is easier to cope with the actual rim assembling work if the object is arranged closer to one of the tread ends.

  According to the knowledge of the present inventors, the preferable positions for installing the fasteners 3 are preferably installed at least at four positions on the circumference (such as at intervals of 90 degrees) in the tire circumferential direction. Most preferably, it is intermittently arranged over the entire circumference at intervals smaller than the 90-degree interval. In that case, it is more preferable to arrange them at equal intervals.

  When vulcanizing with a tape-like member provided with a fastener, the protrusion of the fastener may be vulcanized with a cover attached to avoid damaging the bladder. . The cover may be a pair of other fasteners that engage the fasteners.

  Of the pair of mechanical fasteners 3, either a concave type and a convex type or a female type and male type pair may be installed on the tire side. Or you may install so that both of a pair (concave type and convex type, or female type and male type) may exist together.

  According to the present invention, an object having the other fastener of the pair of mechanical fasteners is engaged with a fastener that is a pair on the inner surface side of the tire, whereby the inner surface of the pneumatic tire is formed. Arranged.

  The object has various functions in accordance with recent high-tech pneumatic tires. For example, (a) an electronic circuit including a sensor, (b) a balance weight, (c) a run-flat core, (D) an object in which an oxygen scavenger, a desiccant and / or an ultraviolet detection color former is applied or mounted; (e) a sound absorbing material; (f) a hook-and-loop fastener member; Etc. are typical ones.

  In FIGS. 6A to 6D, various examples of preferable structures of the object 9 to be attached are shown as models. A sheet material (cloth, film, rubber sheet, or the like) 11 in which the other fastener 10 of the pair of mechanical fasteners is previously installed is attached to the object 9 or is covered with the sheet material 11. Thus, the object 9 can be configured (FIGS. 6A to 6C). 6A shows an example in which only the surface of the object 9 on the tire side is covered with the sheet material 11, and FIG. 6B shows the sheet material 11 except for a part of the surface of the object 9 on the side opposite to the tire. (C) shows an example in which the entire surface of the object 9 is covered with the sheet material 11. In the case where the object 9 is entirely soft, such as a sponge, for example, the fastener 10 may be installed with the upper surface and the lower surface of the object sandwiched therebetween. This mode is shown in FIG. 6D, and the sheet material 11 may not be used or may be used appropriately. As the sheet material 11, it is preferable to use a cloth, a film, a rubber sheet or the like having appropriate flexibility.

  The object 9 may be determined according to the desired characteristics, and is not particularly limited. For example, (a) an electronic circuit including a sensor, (b) a balance weight, and (c) a run flat Or (d) an oxygen-absorbing agent, a desiccant and / or an object coated or mounted with an ultraviolet detection color former, (e) a sound-absorbing material, or (f) a hook-and-loop fastener member, or a combination thereof. The case where it is an object is preferable. In particular, a sound-absorbing material made of an elastic porous material such as sponge or foamed synthetic resin material is recently preferred as an object used in the present invention because it has been strongly desired to reduce tire generated noise. The hook-and-loop fastener member is also useful and preferable as an object used in the present invention because the hook-and-loop fastener member can function as an interposer for attaching another object satisfactorily.

  Of these combinations, particularly specific combination effects can be expected: (b) a balance weight and a sound absorbing material, (b) a sound absorbing material and an ultraviolet light detecting material, (c) a sound absorbing material and a desiccant, and (d) an electronic circuit. And a desiccant. That is, it is possible to use the second object in combination as a functional object effective to realize the special function of one object (first object) stably over a long period of time. It is particularly effective.

1: Pneumatic tire 2: Tire inner peripheral surface 3: Fastener 3a: Constituent member 3b: Constituent member 4: Tread portion 5: Side wall portion 6: Bead portion 7: Tape-like member 8: Inner Liner layer 9: Object 10: Fastener (object side)
11: Sheet material (cloth, film, rubber sheet, etc.)
Ws: Width of tape-like member Wh: Width of fastener attached to tire inner surface

Claims (5)

  A pneumatic tire provided with one of a pair of mechanical fasteners made of hooks or snaps that can be separated into two on the inner surface of the tire, wherein the mechanical fasteners made of hooks or snaps are made of fibers. A tape-shaped member made of a woven fabric or a non-woven fabric, and the ratio of the width Ws of the tape-shaped member and the width Wh of the fastener is 1.2 or more and 5.0 or less, and the tape-shaped member A pneumatic tire characterized by being fixed to a tire inner surface along a direction. The pneumatic tire according to claim 1 , wherein the tape-shaped member has elasticity. The pneumatic tire according to claim 1 or 2 , wherein the tape-shaped member is made of a woven fabric or a nonwoven fabric made of fibers, and has an adhesive layer on at least a surface to be bonded to the tire body. Object, claim 1, which it and said fixed to the tire inner surface in a state where the engaging their two fasteners having the other of the fastener engaging the one fastener in the inner surface of the tire 4. The pneumatic tire according to any one of 3 . The object having the other fastener includes (a) an electronic circuit including a sensor, (b) a balance weight, (c) a run-flat core, (d) an oxygen scavenger, a desiccant and / or an ultraviolet detection color former. 5. The pneumatic tire according to claim 4 , wherein the pneumatic tire is an object applied or mounted, (e) a sound absorbing material, or (f) a hook-and-loop fastener member, or an object obtained by combining a plurality of them.

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