JP4505991B2 - Pneumatic tire with transponder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pneumatic tire having a transponders, with further details to reliably read and writable information of the transponder coated with a resin for storing various kinds of information, the durability during vehicle travel good, moreover it relates to a pneumatic tire having a coated with a resin having excellent communication characteristics transponder.
[0002]
[Prior art]
As shown in the schematic diagram of FIG. 9 , the transponder having both the function of the receiver and the transmitter and the memory function is used to manage tire manufacturing management by the tire manufacturer, tire purchase history management of the tire purchaser, tire internal pressure, temperature, etc. Technologies for installing on tires have been actively developed for the purpose of obtaining information. For example, in Japanese Utility Model Laid-Open No. 2-123404, as shown in FIG. 8, a tire has two bead fillers located radially outside one bead wire, and the transponder is interposed between the two bead fillers. Positioned structures have been proposed and have a certain effect.
[0003]
However, the transponder installed inside the tire is not visible from the outside of the tire at all on the circumference of the tire, especially when the vehicle stops so that the transponder comes to the tire grounding side. It was difficult for radio waves to reach the transponder, and it was necessary to move the vehicle and measure again. What is more difficult to withstand is that the glass-coated transponder is assembled before tire vulcanization at the joints of the tire's internal components, which may cause the transponder to move due to the rubber flow during tire vulcanization. Need to control. In addition, tires are deformed and generate heat when the vehicle is running, and there is always a risk of communication failure and destruction of tire components due to damage to the transponder.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a pneumatic tire that grips a transponder that is capable of reliably reading and writing information on a transponder that stores various types of information and that is excellent in durability when the vehicle is traveling, and a method for manufacturing the same.
[0005]
[Means for Solving the Problems]
The pneumatic tire with a transponder of the present invention is a pneumatic tire provided with a transponder that transmits and receives information on the manufacture and / or state of the tire, and includes a transponder (7) coated with a resin having a through hole (8). A mushroom-like rubber piece (9) having a thickness K of 1 to 5 mm inserted into the through hole (8) on a stepped portion protruding at a predetermined height L from the outer surface of the pneumatic tire. ), And the overall shape of the stepped portion, the transponder (7), and the rubber piece (9) is a truncated cone.
[0006]
In this way, unlike the case where the resin-coated transponder is completely embedded in the tire, a portion of the resin-coated transponder is exposed on the surface of the tire bead, and the resin-coated transponder is exposed. Since the position can be easily identified visually from the outside of the tire, the vehicle can be stopped at a desired position, and the distance from the interrogator (not shown) can be minimized, so there is no fear of reading or writing defects.
[0007]
Furthermore, the fear of dropping off the transponder coated with resin is reduced. Further, even if there is interference between a tire and a curb stone, the influence of external force directly applied to the transponder coated with the resin is small, and the durability of the transponder coated with the resin during vehicle running is excellent.
[0008]
The center of the transponders are positioned with pneumatic tire with transponder within 100mm from the rim flange height radially outward of the tire is provided.
[0009]
As a result, the position of the transponder coated with resin can be confirmed visually from the outside of the tire, and it is possible to communicate by shortening the distance to the interrogator significantly, so there is no fear of reading or writing failure, and a relatively pneumatic tire Since the transponder coated with the resin is held on the tire bead portion that is less affected by the deformation of the tire, good durability performance during tire traveling can be obtained.
[0010]
Furthermore, unlike the case where it is embedded inside the tire, there is no concern that the position of the transponder coated with resin will be unclear in appearance.
[0011]
Also, since the position embedded a transponder covered with a resin can be identified by simple visual inspection from the outside of the tire, on which can stop the vehicle at a desired position, even in tire repetitive bending deformation is applied, relatively In addition, since the transponder coated with the resin is gripped from the surface of the tire bead portion, which is less affected by deformation, to the outside, good durability performance can be obtained.
[0012]
In addition, since the center of the transponder is located within 100 mm outward from the rim flange height in the tire radial direction, the position of the transponder covered with resin can be confirmed visually from the outside of the tire, and the distance from the interrogator is remarkably shortened. Because there is no fear of reading and writing failures because it can communicate with each other, and because the transponder coated with resin is gripped on the tire bead part where the influence of deformation is relatively small, the durability performance during tire driving is good Is obtained.
[0013]
Upon gripping the transponder covered with tree fat in the tire bead portion, a transponder covered with the resin in recessed portions of the mold surface, pre-arranged by fitting a transponder covered with the resin, then By inserting an unvulcanized tire into a mold and vulcanizing it, the transponder covered with resin is gripped by fitting into the recessed part of the mold surface even if the rubber flow during vulcanization is large Therefore, it can be accurately installed at a desired location.
[0014]
Further, upon gripping the transponder covered with tree fat in the tire bead portion, a shelf provided in recessed portions of the coated outer diameter greater than the mold surface of the transponder in the resin, a transponder covered with the resin The side tread rubber is recessed in the mold through the periphery of the resin-coated transponder by inserting the vulcanized tire into the mold and then vulcanizing it by fitting it in the shelf in advance. Therefore, the transponder coated with resin is gripped so as to hold it, so that there is no fear of the transponder coated with resin peeling off or falling off.
[0015]
Furthermore , the resin-coated transponder has a through-hole, and vulcanized with a mold having a depression on the mold surface with a depth greater than the thickness of the resin-coated transponder. The side tread rubber flows into the recessed part of the mold and spreads in the recessed part of the mold like a mushroom umbrella, so that the resin-coated transponder can be gripped well. Moreover, the transponder coated with the tire side tread rubber with the resin is vulcanized higher than the tire surface by the depth of the depression on the mold surface than the thickness of the transponder coated with the resin. That is, by providing a difference between the thickness of the transponder coated with the resin and the recess depth of the mold, the gripping height of the transponder coated with the resin can be freely adjusted.
[0016]
The front center of the recess of Kikin type surface, transponder coated with a resin in the tire during vulcanization by vulcanizing in a mold which is positioned within 100mm radially outward of the tire from the rim flange height It can be prevented from moving, and the gripping position of the transponder coated with the resin can be arranged in a bead portion having a relatively small bending deformation.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described with reference to the drawings. However, it is a matter of course that the scope of the present invention is not limited to these examples. FIG. 1A is an enlarged sectional view in the radial direction of a bead portion holding a resin-coated square plate-like transponder 7 in a pneumatic tire with a transponder according to a reference example of the present invention. Is a carcass cord, 3 is finishing, 4 is a bead wire, 5 is a bead filler, 6 is a side tread, 7 is a resin-coated transponder, and the resin-coated transponder is outside the tire bead surface. The state exposed to the part is shown.
[0018]
FIG. 1 (b) is a perspective view of a square plate-like transponder 7, FIG. 1 (c) is an enlarged partial sectional view in the radial direction of a transponder coated with resin, and J is a transponder coated with resin. The thickness which a side tread covers partially is shown.
[0019]
FIG. 2A is an enlarged front view of a mold of a transponder gripping portion coated with resin, 12 is a shelf for gripping the transponder coated with resin, and 13 is an inlet for side tread rubber. 2 (b) is a cross-sectional view taken along arrow A1A2 in FIG. 2 (a) and shows an inflow portion of the side tread rubber, and FIG. 2 (c) is a cross-sectional view taken along arrow B1B2 in FIG. This represents a mold shelf 12 to which the coated transponder 7 is fitted, and an M portion to which the transponder 7 coated with resin is fitted in advance.
[0020]
In this way, unlike the case where the resin-coated transponder 7 is completely embedded in the tire, the resin-coated transponder 7 is exposed on the surface of the tire bead portion 1, and the resin-coated transponder 7 is exposed. Since the position where the mark is embedded can be easily visually identified from the outside of the tire, the vehicle can be stopped at a desired position, and communication can be performed with the shortest distance to the interrogator (not shown), so there is no fear of reading or writing defects.
[0021]
The thickness J that the side tread 6 partially covers the transponder 7 coated with resin is 1 to 5 mm, preferably 2 to 4 mm. If it is less than 1 mm, the gripping effect is small, and if it exceeds 5 mm, the rubber flow during vulcanization tends to be poor, which is not preferable. Therefore, since the transponder 7 coated with the resin is gripped so that the side tread 6 holds the resin, the transponder 7 coated with the resin is less likely to drop out even if there is interference from the outside, and good durability can be maintained. .
[0022]
The shape of the transponder 7 coated with the resin is not limited to a square plate shape, but may be an appropriate shape such as a disk shape or a hexagonal plate shape. The shape of the concave shape of the mold and the shape of the transponder 7 coated with the resin are also mutually connected. It may be appropriate if it can be fitted. Further, the transponder resin coated with the resin of the present invention is not particularly limited as long as it has heat resistance during tire vulcanization, but has a melting point of 200 ° C. or higher, or a thermal decomposition temperature, such as an epoxy resin. Any resin may be used.
[0023]
FIG. 3A is an enlarged view of a bead portion holding a transponder 7 covered with a resin having a through hole 8 in a pneumatic tire with a transponder of another reference example of the present invention, and FIG. 3B is a through hole. 3 is a transponder 7 coated with a disc-shaped resin having a cross-sectional enlarged view of a transponder gripping portion coated with a resin, and FIG. 3 (d) is coated with a disc-shaped resin. It is the front enlarged view of the bead part 1 which hold | gripped the transponder 7, and C1C2 in the figure represents a cut surface. By doing so, not a transponder 7 that is coated with a resin side tread 6 has just cover partially firmly becomes possible to grasp a transponder 7 that is coated with a resin through the through hole 8.
[0024]
FIG. 4A is an enlarged sectional view in the radial direction of the bead portion of the tire holding the transponder 7 covered with the resin having the through hole 8 in the pneumatic tire with a transponder of still another reference example of the present invention. b) is a transponder 7 coated with a disc-shaped resin having a through-hole 8, and FIG. 4C is an enlarged radial cross-sectional view of a transponder gripping portion coated with the resin, and the transponder 7 is a cylindrical resin. In which the through hole 8 is gripped by the tire bead portion 1 toward the surface side of the tire bead portion. The shape of the transponder 7 coated with resin is not limited to a disk shape or a truncated cone, but may be an appropriate shape such as a square plate shape or a hexagonal plate shape.
[0025]
The size of the outer diameter of the bulk of the mushroom-shaped rubber piece 9 is larger than the through hole 8 of the transponder 7, which is coated with a resin, may as long as that does not fall out, the rubber piece 9 which is molded in advance mushroom shape It may be vulcanized after being inserted into the through hole. At that time, the thickness K of the bulk of the mushroom-like rubber piece 9 is 1 to 5 mm, preferably 2 to 4 mm. If it is less than 1 mm, the gripping effect is small, and if it exceeds 5 mm, the rubber flow at the time of vulcanization tends to be poor, which is not preferable.
[0026]
FIG. 5A is an enlarged sectional view in the radial direction of the bead portion of the tire holding the transponder 7 covered with the resin having the through hole 8 in the pneumatic tire with a transponder according to the embodiment of the present invention. 5 is a transponder 7 covered with a resin in the shape of a trapezoid having a through hole 8, and FIG. 5C is an enlarged sectional view in the radial direction of the gripping portion of the transponder 7 covered with the resin. The transponder 7 is lifted from the surface of the tire bead portion 1 by a thickness L and is held. By floating from the surface of the mold, it is difficult for the transponder 7 coated with resin to be affected by the bending deformation of the tire, and good durability performance can be expected. The lifting height L from the tire surface may be appropriately determined depending on the thickness of the transponder 7 coated with the resin. However, if it is too high, it will be susceptible to interference from curbstones and the like, so it is preferably 10 mm or less, more preferably 5 mm or less.
[0027]
FIG. 6 is a perspective explanatory view of the tire 11 showing a gripping position of the resin-coated transponder 7 in the pneumatic tire with a transponder according to the embodiment of the present invention , and the tire bead portion 1 is coated with the resin. Since the position of the transponder 7 coated with the resin can be seen by visual observation, the reading and writing can be surely performed by applying the interrogator to the position. Therefore, the resin-coated transponder 7 can be gripped relatively away from the tread, and good running durability and external interference such as curbstones are not directly applied to the resin-coated transponder 7. Therefore, the occurrence of failure due to destruction can be suppressed.
[0028]
Figure 7 is a tire cross-sectional view of a coated transponders 7 and positional relationship of the rim in the resin in the pneumatic tire with a transponder according to an embodiment of the present invention, a transponder 7 that is coated with a resin from the rim flange height H When the height to the center of G is G, G is 100 mm or less, and preferably 70 mm or less, so that good durability can be obtained. If it exceeds 100 mm, it becomes close to the tire side portion, and distortion during running under load of the vehicle becomes large, and the risk of peeling or dropping off of the transponder 7 increases. Further, in order to prevent the outer periphery of the transponder 7 coated with resin from coming into contact with the rim when the vehicle is loaded, it is desirable that the transponder 7 be separated from the rim flange height H by at least 10 mm or more, preferably 20 mm or more.
[0029]
[Comparative example]
Figure 4 (a) ~ the through hole 8 of the outer diameter of 3mm provided with an outer diameter of 20mm 3mm thick in the center in the reference example described (c), the Shore D hardness 96, decomposition temperature 300 ° C., bisphenol A A disc-shaped transponder 7 coated with an epoxy resin was used.
[0030]
The resin-coated transponder 7 is placed at a position corresponding to 40 mm from the rim flange of 11R22.5 16PR of the general pavement running pattern, and a recess having a depth of 3 mm and a diameter of 20.5 mm, When the tire is gripped by a tire as shown in FIG. 4 having a hollow (bulb portion) having a thickness of 2 mm at the center (1), a die is located at a position corresponding to 110 mm from the rim flange at a depth of 3 mm and a diameter of 20 Two types of tires (2) are manufactured as shown in Fig. 8 when a 5-mm recess and a 2mm-thick recess (bulge) are provided in the center and gripped as shown in Fig. 4. The conventional transponder shown in Fig. 9 is shown in Fig. 8. The indoor drum durability test was carried out using the case (3) embedded in the bead filler as a conventional example.
[0031]
Test conditions refer to the JATMA 2000 version, standard rim 22.5 × 8.25, load 26.72kN, air pressure 700kPa, speed 60km / hr, driving until the transponder of (3) conventional example becomes unable to communicate Expressed with an index where time is 100.
[0032]
[Table 1]
[0033]
The running test results are as shown in Table 1, and it is understood that the durability performance of the transponder (1) coated with the resin which is a reference example of the present invention is clearly excellent. Furthermore, there is a protrusion with a grip height of 5 mm and a diameter of 20.5 mm on the tire surface, and by directly applying the interrogator there, the distance from the resin-coated transponder 7 can be minimized, It is easily understood that there is no need to search around the tire circumference as in the conventional example.
[0034]
【The invention's effect】
According to the pneumatic tire with a transponder of the present invention , it is possible to reliably read and write information of a transponder coated with a resin that stores various information, and also has excellent durability during vehicle running and communication characteristics. excellent it is possible to provide a pneumatic tire having a coated transponders resin.
[Brief description of the drawings]
[1] A reference example of the pneumatic tire with the transponder of the present invention, (a) the bead portion radially enlarged sectional view of a tire gripping the transponder covered with tree fat, (b) a square-shaped resin FIG. 2 is a transponder gripping part radial direction enlarged view of a transponder coated with a resin, (c) a transponder gripped with a resin of FIG.
2A is an enlarged front view of a transponder gripping portion covered with a resin of a mold, FIG. 2B is an enlarged cross-sectional view taken along arrow A1A2 in FIG. 2A, and FIG. 2C is an arrow B1B2 in FIG. FIG.
[Figure 3] A separate pneumatic tire with a transponder of Reference Example of the present invention, (a) the bead portion radially enlarged sectional view of a tire gripping the coated transponder resin with transmural throughbore, (b 3) a transponder coated with a resin having a disk-like through-hole, (c) a radial cross-sectional enlarged view of a transponder gripping portion coated with the resin of the present invention in FIG. 3 (a), and (d) in FIG. 3 (a). It is a transponder holding part front enlarged view coated with resin.
[4] A further pneumatic tire with another reference example of a transponder of the invention, (a) the bead portion radially enlarged sectional view of a tire gripping the coated transponder resin with transmural throughbore, ( b) Transponder coated with a resin having a disk-like through hole, (c) An enlarged radial cross-sectional view of a transponder gripping portion coated with the resin of the present invention in FIG.
[5] A pneumatic tire with a transponder according to an embodiment of the present invention, bead portion enlarged sectional view of a tire gripping the transponder coated with a resin having (a) transmural throughbore, (b) Enshide FIG. 5 is a cross-sectional enlarged view of a transponder covered with a resin having a trapezoidal through hole, (c) FIG. 5 (a) and a transponder gripping part covered with another resin of the present invention.
FIG. 6 is a tire perspective explanatory view showing a place where a transponder is covered with a resin of a pneumatic tire with a transponder according to an embodiment of the present invention.
FIG. 7 is a half cross-sectional view in the tire radial direction showing a place where a transponder is covered with a resin of a pneumatic tire with a transponder according to an embodiment of the present invention.
FIG. 8 is a layout diagram of transponders in a conventional pneumatic tire.
FIG. 9 is a schematic diagram of a conventional transponder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bead part 2 Carcass cord 3 Finishing 4 Bead wire 5 Bead filler 6 Side tread rubber 7 Resin-coated transponder 8 Through hole 9 Mushroom-shaped rubber piece 10 Conventional transponder 11 Tire 12 Shelf 13 where transponder is fitted 13 Side tread Inlet G Height from rim flange height to center of transponder covered with resin H Rim flange height J Cover thickness K Thickness of mushroom-shaped rubber piece L Bottom raised height M Transponder fitting position

Claims (4)

A pneumatic tire provided with a transponder for transmitting and receiving information on the manufacture and / or condition of the tire,
A transponder (7) coated with a resin having a through hole (8) is inserted into the through hole (8) on a stepped portion protruding at a predetermined height L from the outer surface of the pneumatic tire. It is fixed with a mushroom-shaped rubber piece (9) having a thickness K of 1 to 5 mm, and the overall shape of the stepped portion, the transponder (7) and the rubber piece (9) is a truncated cone. Pneumatic tire with transponder as a feature. The pneumatic tire with a transponder according to claim 1, wherein the predetermined height L is 10 mm or less . The pneumatic tire with a transponder according to claim 1 or 2, wherein the center of the transponder (7) is located within 100 mm on the outer side in the tire radial direction from a height H of a rim flange mounted on the pneumatic tire. . The pneumatic tire with a transponder according to any one of claims 1 to 3, wherein the transponder (7) is fixed to an outer surface of a bead portion (1) of the pneumatic tire.