JP2009298328A - Pneumatic tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pneumatic tire having a part retaining patch which is more hardly peeled off while securing strength required for retaining a part to be mounted such as an electronic device. <P>SOLUTION: The pneumatic tire 1 has the part retaining patch 15 for retaining the part 13 to be mounted to the pneumatic tire 1 and formed of a predetermined elastic material. The part retaining patch 15 has a mounting surface 15B mounted to an inner side surface of the pneumatic tire 1, and the mounting surface 15B has an adhesion portion 17A positioned at an outer edge of the part retaining patch 15 and adhered to the inner side surface; and a non-adhesion portion 17B positioned at a central side of the part retaining patch from the adhesion portion 17A and not adhered to the inner side surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pneumatic tire that holds a mounted component that is attached to a pneumatic tire and includes a component holding patch formed of a predetermined elastic material.

  Conventionally, an electronic device such as a sensor or a radio transmitter is mounted on the inner surface of a pneumatic tire mounted on a rim wheel in order to detect the state of the pneumatic tire mounted on the vehicle (for example, internal pressure, internal temperature, wear). Etc. (attachment parts) are known.

For example, a plate-shaped component holding patch formed of an elastic material such as rubber is bonded to the inner surface of a pneumatic tire, specifically, the inner surface of a tread portion, and an electronic device is attached to the bonded component holding patch. An attached pneumatic tire is disclosed (for example, see Patent Document 1).
JP 2007-24696 A (FIGS. 1 and 2)

  However, the conventional pneumatic tire described above has the following problems. That is, when the rigidity of the component holding patch (rubber hardness) is high, the component holding patch cannot follow the deformation accompanying the rolling of the pneumatic tire, and the component holding patch peels off from the inner surface of the pneumatic tire. There was a problem that it would be easier.

  Specifically, a pneumatic tire mounted on a vehicle rolls while receiving a load. That is, in the tread portion, the ground contact portion in contact with the road surface is deformed into a flat shape in a side view of the pneumatic tire. On the other hand, the non-grounding portion of the tread portion that is not in contact with the road surface has an arc shape.

  Since the tread portion rolls while deforming in this way, if the component holding patch does not follow the tread portion and deform, stress concentrates on the bonded portion between the component holding patch and the inner surface of the pneumatic tire, and the component The holding patch is easily peeled off.

  Of course, if the rigidity of the component holding patch is lowered, the concentration of stress on the bonded portion is reduced and the peeling of the patch can be suppressed. However, there is a problem that the strength of the patch itself is insufficient and the patch is easily damaged.

  Therefore, the present invention has been made in view of such a situation, and a pneumatic tire provided with a component holding patch that is more difficult to peel off while ensuring the strength required for holding a mounted component such as an electronic device. The purpose is to provide.

  In order to solve the above-described problems, the present invention has the following features. First, the invention according to the first feature is a pneumatic tire that holds a mounted part to be attached to a pneumatic tire and includes a part holding patch formed of a predetermined elastic material. It has a mounting surface that is attached to the inner surface of the tire, and the mounting surface is located on the outer edge of the component holding patch, and is located on the center side of the component holding patch relative to the bonded portion. In addition, the gist of the present invention is to have an inner surface and a non-bonded portion that is not bonded.

  According to such a feature, since the mounting surface of the component holding patch has an adhesive portion and a non-adhesive portion, the stress generated by the deformation of the inner surface accompanying the rolling of the pneumatic tire is released at the non-adhesive portion. And the component holding patch is more difficult to peel off.

  Specifically, the deformation of the inner surface accompanying the rolling of the pneumatic tire, that is, the deformation transmitted directly from the inner liner can be absorbed by expansion and contraction of the non-adhesive portion. As a result, fatigue, stress, strain, impact, vibration, etc. of the component holding patch can be minimized, and the component holding patch becomes more difficult to peel off.

  In addition, the component holding patch does not decrease the rigidity (rubber hardness) and the component holding patch is difficult to peel off. Therefore, the strength required for holding a mounted part such as an electronic device in the component holding patch (that is, durability) Property).

  The gist of the invention relating to other features is that the adhesion portion is located at the outer edge along the tread width direction.

  According to such a feature, the adhesive portion is located on the outer edge along the tread width direction, so that it is non-adhering to the deformation of the inner surface accompanying the rolling of the pneumatic tire, that is, the deformation directly transmitted from the inner liner. Since the portion easily expands and contracts, the non-adhesive portion can further absorb the deformation of the inner surface accompanying the rolling of the pneumatic tire.

  The gist of the invention relating to the other features is that the non-adhered portion is located below the attached component and has a larger contact area where the attached component contacts the component holding patch.

  According to such a feature, the non-adhesive portion is located below the attached component and has a larger contact area where the attached component is in contact with the component holding patch. Before the deformation, that is, the deformation directly transmitted from the inner liner is transmitted to the mounted part, the deformation can be absorbed by the non-adhesive portion. For this reason, the impact, vibration, etc. transmitted to the mounted component can be minimized, and the failure of the mounted component can be suppressed.

  The gist of the invention relating to other features is that the adhesion area, which is the total area of the adhesion portions, is 30% or more with respect to the total area of the attachment surface, which is the total area where the attachment surface is in contact with the inner surface.

  According to this feature, the component holding patch is more reliably prevented from being peeled off more reliably when the adhesion area is 30% or more with respect to the total mounting surface area.

  Another aspect of the invention is characterized in that the component holding patch is formed of a material containing butyl rubber.

  According to such a feature, the component holding patch is formed of a material containing butyl rubber, thereby extending the life of the component holding patch and the strength required for holding a mounted component such as an electronic device in the component holding patch ( That is, since durability is improved, high-speed durability against high-speed rotation is improved even at the end of use.

  ADVANTAGE OF THE INVENTION According to this invention, a pneumatic tire provided with the component holding patch which is harder to peel off can be provided, ensuring the intensity | strength requested | required of holding | maintenance of components to be attached, such as an electronic device.

  Next, an example of a pneumatic tire according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(Composition of pneumatic tire)
First, the configuration of the pneumatic tire according to the present embodiment will be described with reference to FIG. FIG. 1 is a cross-sectional view in the tread width direction showing the pneumatic tire according to the present embodiment.

  As shown in FIG. 1, the pneumatic tire 1 includes a bead portion 3 that is in contact with a rim (not shown), and a carcass layer 5 that is folded back at the bead portion 3. On the inner peripheral side of the carcass layer 5, an inner liner 7 which is a highly airtight rubber layer corresponding to a tube is provided.

  A tread portion 9 that is in contact with the road surface is provided outside the carcass layer 5 in the tire radial direction. A plurality of belt layers 11 that reinforce the tread portion 9 are provided between the carcass layer 5 and the tread portion 9.

  On the inner side in the tire radial direction of the inner liner 7 located on the inner side in the tire radial direction of the belt layer 11, the mounted state for grasping the state (for example, internal pressure, internal temperature, wear) of the pneumatic tire 1 attached to the vehicle. A component 13 and a component holding patch 15 that holds the mounted component 13 are provided.

(Configuration of mounted parts and parts holding patches)
Next, the configuration of the mounted component and the component holding patch according to the present embodiment will be described with reference to FIGS. FIG. 2 is a perspective view showing the mounted component and the component holding patch according to the present embodiment, and FIG. 3 is a bottom view showing the component holding patch according to the present embodiment (viewed from the arrow A in FIG. 2). It is.

  As shown in FIG. 2, the mounted part 13 is a sensor that measures the air pressure (internal pressure), internal temperature, wear, etc. of the compressed air filled in the pneumatic tire 1, and the measurement result is transmitted to the vehicle or the like by wireless communication. It has an electronic device 13A composed of a wireless transmitter for transmission, and a housing 13B that protects the electronic device 13A.

  The attached component 13 only needs to be attached to the inner surface of the pneumatic tire 1 by the component holding patch 15. For example, tire information input by the manufacturer of the pneumatic tire 1 (for example, name and manufacturing) Of course, it may be an IC chip for storing date, serial number, lot number) or a wireless receiver for receiving various information by wireless communication.

  The component holding patch 15 has a rectangular plate shape made of a predetermined elastic material. In addition, the component holding patch 15 is formed wider than the bottom surface of the housing 13 </ b> B constituting the attached component 13.

  Specifically, the component holding patch 15 is preferably formed of a material containing at least butyl rubber. For example, the component retaining patch 15 is made of ethylene propylene diene monomer rubber (EPDM), natural rubber, a mixture of neoprene rubber and natural rubber, a mixture of chlorobutyl rubber and natural rubber, a mixture of styrene butadiene rubber (SBR) and natural rubber, butyl rubber ( Of course, a mixture of BR) and natural rubber may be included.

  The component holding patch 15 includes a fixing surface 15A that is fixed to the mounted component 13 with an adhesive, a double-sided tape, and the like, a mounting surface 15B that is attached to the inner surface (inner liner 7) of the pneumatic tire 1, and a fixing surface 15A. And a side surface 15C connecting the mounting surface 15B.

  As shown in FIG. 3, the attachment surface 15B is located on the entire outer edge of the component holding patch 15, and is bonded to the inner surface of the pneumatic tire 1, and the component holding patch is more than the bonding portion 17A. 15 and has a non-adhesive portion 17B that is not bonded to the inner side surface of the pneumatic tire 1. That is, the component holding patch 15 and the inner side surface (inner liner 7) of the pneumatic tire 1 are bonded only by the bonding portion 17A with an adhesive, a double-sided tape, or the like.

  Note that the adhesive portion 17A does not necessarily need to be located around the entire outer edge portion. For example, as illustrated in FIG. 4, the adhesion portion 17 </ b> A may be located at an outer edge portion along the tread width direction. As shown in FIG. 5, when the mounted component 13 is larger than the component holding patch 15, the adhesive portion 17 </ b> A may be located at a plurality of outer edge portions (four locations in the drawing). In other words, the adhesive portion 17 </ b> A does not have to be located below (directly below) the mounted component 13.

  The adhesion area (S1), which is the total area of the adhesion portion 17A, is preferably 30% or more with respect to the total area of the attachment surface, which is the total area where the attachment surface 15B is in contact with the inner side surface (inner liner 7). When the adhesion area (S1) is smaller than 30% with respect to the total mounting surface area, the strength (that is, durability) required for holding the mounted component 13 such as the electronic device 13A in the component holding patch 15 is increased. The component holding patch 15 may be easily peeled off.

  The non-adhesive portion 17B is located below the attached component 13. Further, the non-bonded portion 17B is larger than the contact area (S2) where the mounted component 13 contacts the component holding patch 15. If the non-adhesion portion 17B is smaller than the contact area (S2), the adhesion area (S1) increases and the non-adhesion portion 17B is constrained, that is, deformation of the inner surface accompanying the rolling of the pneumatic tire 1, that is, In some cases, the effect of absorbing the deformation directly transmitted from the inner liner 7 by the non-adhesive portion 17B is reduced.

(Action / Effect)
According to the pneumatic tire 1 according to the present embodiment described above, the mounting surface 15B of the component holding patch 15 includes the bonded portion 17A and the non-bonded portion 17B, so that the pneumatic tire 1 rolls. Thus, the stress generated by the deformation of the inner surface can be released at the non-adhesive portion 17B, and the component holding patch 15 becomes more difficult to peel off.

  Specifically, the deformation of the inner surface accompanying the rolling of the pneumatic tire 1, that is, the deformation directly transmitted from the inner liner 7 can be absorbed by the non-adhesive portion 17B expanding and contracting. As a result, fatigue, stress, strain, impact, vibration, etc. of the component holding patch 15 can be minimized, and the component holding patch 15 becomes more difficult to peel off.

  Then, the rigidity (rubber hardness) of the component holding patch 15 is not lowered, and the component holding patch 15 is difficult to peel off. Therefore, the component holding patch 15 is required to hold the mounted component 13 such as the electronic device 13A. Strength (that is, durability) can be ensured.

  In addition, since the adhesive portion 17A is located at the outer edge portion along the tread width direction, the non-adhesive portion 17B is easily expanded and contracted with respect to the deformation of the inner surface accompanying the rolling of the pneumatic tire 1, so The non-adhesive portion 17B can further absorb the deformation of the inner surface accompanying the rolling of the tire 1.

  Further, the non-adhesive portion 17B is located below the attached component 13 and has a larger contact area where the attached component 13 is in contact with the component holding patch 15, whereby the inner surface accompanying the rolling of the pneumatic tire 1. That is, before the deformation directly transmitted from the inner liner 7 is transmitted to the mounted component, the non-adhesive portion 17B can absorb the deformation. For this reason, the impact, vibration, etc. transmitted to the mounted component 13 can be minimized, and the failure of the mounted component 13 can be suppressed.

  In addition, when the adhesion area (S1) is 30% or more with respect to the total mounting surface area (adhesion area (S1) and contact area (S2)), the component holding patch is more reliably prevented from peeling off.

  Further, the component holding patch 15 is formed of a material containing butyl rubber, thereby extending the life of the component holding patch 15 and the strength required for holding the mounted component 13 such as the electronic device 13A in the component holding patch 15. Since (that is, durability) is improved, high-speed durability against high-speed rotation is improved even at the end of use.

[Other embodiments]
As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention.

  Specifically, the component holding patch 15 has been described as a component that fixes the mounted component 13 with an adhesive, a double-sided tape, or the like (a so-called pedestal patch), but is not limited thereto. For example, as shown in FIG. 6, the component holding patch 15 embeds the mounted component 13 inside (so-called encapsulated patch), or covers the mounted component 13 with a belt-shaped member 19 as illustrated in FIG. 7. Of course, it may be a thing (so-called cover type patch), and it is only necessary to fix the mounted part 13.

  Moreover, although the to-be-attached component 13 and the component holding patch 15 were demonstrated as what was provided in the tire radial direction inner side of the inner liner 7 located in the tire radial direction inner side of the belt layer 11, it is not limited to this For example, the inner liner 7 positioned on the inner side in the tread width direction of the bead portion may be provided further on the inner side in the tread width direction, and may be provided on the inner surface of the pneumatic tire 1. .

  The component holding patch 15 (attached component 13) has been described as being formed in a rectangular shape, but is not limited thereto. For example, the component holding patch 15 (attached component 13) may have a shape such as a square, a rhombus, a circle, or an ellipse. May be.

  Further, although the pneumatic tire 1 has been described as a radial tire including the bead portion 3 and the carcass layer 5, the pneumatic tire 1 is not limited to this and may be a bias tire or the like.

  From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

  Next, in order to further clarify the effects of the present invention, the results of tests performed using pneumatic tires according to the following comparative examples and examples will be described. In addition, this invention is not limited at all by these examples.

  Data on each pneumatic tire was measured under the following conditions.

・ Tire size: 205 / 65R16
-Size of mounted parts: 30mm x 20mm x 5mm
-Size of component holding patch: 50mm x 30mm x 5mm
The adhesiveness between the component holding patch and the inner surface of the pneumatic tire in these pneumatic tires will be described with reference to Table 1.

  In addition, the method to attach the to-be-attached component 13 to the inner surface of the pneumatic tire 1 is demonstrated easily. First, the fixing surface 15A of the component holding patch 15 is buffed by a glider to roughen the fixing surface 15A. Then, the buff powder is removed, and the fixed surface 15A and the mounted part 13 are bonded to each other using a chloroprene adhesive (manufactured by Sumitomo 3M: EC-1368NT) and allowed to elapse for 48 hours or more.

  Similarly, the inner surface (inner liner 7) of the pneumatic tire 1 to which the component holding patch 15 is attached is buffed by a glider to roughen the inner surface. Then, the buff powder is removed and pasted together using a chloroprene adhesive (manufactured by Sumitomo 3M: EC-1368NT) and allowed to elapse for 48 hours or more.

The fixing means between the mounted member 13 and the component holding patch 15 and the fixing means between the component holding patch 15 and the inner peripheral surface of the pneumatic tire 1 are not limited to chloroprene-based adhesives. It may be a tape (Sumitomo 3M Co., Ltd .: Beta tape 4402 or acrylic foam structure bonding tape Y-4604). Further, the mounted component 13 and the component holding patch 15 are not only fixed with an adhesive (so-called pedestal type patch) but also embedded with the mounted component 13 inside the component holding patch 15 (so-called inclusion type). A patch) or a member (so-called cover type patch) in which the attached component 13 is covered with a belt-like member 19 provided on the component holding patch 15 may be used.

<Adhesiveness>
Each pneumatic tire is mounted on a test drum, and an adhesive portion between the component holding patch and the inner surface of the pneumatic tire is confirmed every about 5000 km, and the adhesion of the pneumatic tire according to Comparative Example 1 (conventional example) (Calculating the travel distance at which the bonded part did not peel off) was set to “100”, and the adhesiveness of other pneumatic tires was indexed. In addition, it is excellent in adhesiveness, so that an index | exponent is large.

  As a result, it was found that the pneumatic tires according to Examples 1 to 3 were excellent in adhesion between the component holding patch 15 and the inner surface of the pneumatic tire 1 as compared with the pneumatic tire according to the comparative example. That is, the attachment surface 15B of the component holding patch 15 has an adhesive portion and a non-adhesive portion, whereby the adhesiveness between the component holding patch 15 and the inner surface of the pneumatic tire 1 is increased, and the component holding patch 15 is more It turns out that it becomes difficult to peel off.

It is a tread width direction sectional view showing the pneumatic tire concerning this embodiment. It is a perspective view which shows the to-be-attached component and component holding patch which concern on this Embodiment. FIG. 3 is a bottom view (part A view of FIG. 2) showing a component holding patch according to the present embodiment (part 1); FIG. 6 is a bottom view (part A view of FIG. 2) showing the component holding patch according to the present embodiment (part 2); FIG. 6 is a bottom view (part A view of FIG. 2) showing the component holding patch according to the present embodiment (part 3); It is a perspective view which shows the to-be-attached component and component holding patch which concern on other embodiment (the 1). It is a perspective view which shows the to-be-attached component and component holding patch which concern on other embodiment (the 2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pneumatic tire, 3 ... Bead part, 5 ... Carcass layer, 7 ... Inner liner, 9 ... Tread part, 11 ... Belt layer, 13 ... Mounted part, 13A ... Electronic device, 13B ... Case, 15 ... Part Holding patch, 15A ... fixed surface, 15B ... mounting surface, 15C ... side surface, 17A ... adhered portion, 17B ... non-adhered portion, 19 ... band-shaped member

Claims (5)

A pneumatic tire that holds a mounted component attached to a pneumatic tire and includes a component holding patch formed of a predetermined elastic material,
The component holding patch has an attachment surface that is attached to an inner surface of the pneumatic tire.
The mounting surface is
Located on the outer edge of the component holding patch, an adhesive part that is bonded to the inner surface;
A pneumatic tire having a non-adhesive portion that is located closer to the center of the component holding patch than the adhesive portion and is not bonded to the inner side surface.   The pneumatic tire according to claim 1, wherein the adhesion portion is located at the outer edge portion along a tread width direction.   2. The pneumatic tire according to claim 1, wherein the non-adhesive portion is located below the attached component and has a larger contact area where the attached component contacts the component holding patch.   2. The pneumatic according to claim 1, wherein a bonding area which is a total area of the bonding portions is 30% or more with respect to a total mounting surface area which is a total area where the mounting surface is in contact with the inner surface. tire.   The pneumatic tire according to claim 1, wherein the component holding patch is formed of a material containing butyl rubber.

Images