JP2014159203A - Fitting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting member which can be easily fitted to a member to be fitted such as a tire and which hardly drops out after fitting.SOLUTION: In a hole part 22 formed on a member 20 to be fitted, a fitting member comprises: an insertion part 3 to be inserted from one end part 3a; and an exterior part 5 extending from the other end part 3b. The insertion part 3 comprises an elastic body of a loss coefficient of 0.17 or more.

Description

  The present invention relates to a mounting member mounted on a non-mounting member such as a pneumatic tire.

  Conventionally, in order to decorate the side portions of the tire, contrivances such as arranging and arranging ridges, arranging characters, and coloring have been made (for example, see Patent Document 1).

JP 2008-273505 A

  However, in the above-described conventional method, the decoration is applied to the tire in advance, and the user cannot freely change the decoration because the user does not freely remove or remove the decorated member.

  Therefore, an object of the present invention is to provide a mounting member that can be easily mounted on a mounted member such as a tire and that does not easily fall off after mounting.

  The present invention has been made to solve the above-described problems, and the mounting member according to the present invention includes an insertion portion that is inserted from one end into a hole formed in the mounted member, and the insertion portion. And an exterior portion extending from the end portion, wherein the insertion portion is made of an elastic body and has a loss coefficient of 0.17 or more. Here, the “loss factor” is, for example, using a viscoelastic spectrometer manufactured by Toyo Seiki Co., Ltd., in a state where the elastic body is stretched by 2%, under conditions of dynamic strain 1%, frequency 50 Hz, The dynamic loss factor (tan δ) measured at room temperature (measurement temperature 30 ° C.).

  Such a mounting member can be easily mounted by inserting the insertion portion into the hole of the mounting member, and the loss factor of the insertion portion is 0.17 or more, so that the mounting member can be mounted after mounting. Even if it is deformed, the deformation can be converted into thermal energy to suppress dropping.

  In the mounting member of the present invention, it is preferable that the insertion portion has a tensile stress at 25% elongation of 3.0 MPa or more, and according to this, the deformation of the insertion portion during insertion is suppressed. Thus, the mounting can be further facilitated. Here, the “tensile stress at 25% elongation” is a tensile stress measured by a tensile strength test specified in JIS K 6251 under conditions of room temperature (measurement temperature 23 ° C.) and a tensile speed of 500 mm / min.

  In the mounting member according to the present invention, the insertion portion includes a central portion extending along the insertion direction from the one end portion to the other end portion, and an outer peripheral portion disposed on the outer peripheral side of the central portion. And having a dynamic elastic modulus at 30 ° C. and a strain of 1% in the outer peripheral portion is preferably 10 or more smaller than a dynamic elastic modulus at 30 ° C. and a strain of 1% in the central portion. Can be more easily facilitated, and the effect of suppressing the drop-off after mounting can be more reliably enhanced. The dynamic elastic modulus can be measured under the condition for measuring the dynamic loss coefficient.

  In the mounting member of the present invention, the diameter of the cross section perpendicular to the insertion direction of the central portion is in the range of 25 to 95% of the diameter of the cross section perpendicular to the insertion direction of the outer peripheral portion. It is preferable, and according to this, the insertion can be facilitated more reliably, and the drop-off suppressing effect after mounting can be more reliably enhanced.

  Further, in the mounting member of the present invention, it is preferable that the dynamic elastic modulus at 30 ° C. and 1% strain of the central portion is 70 or more. According to this, the deformation at the time of insertion is suppressed. Mounting can be facilitated more reliably.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the mounting member which can be easily mounted | worn with respect to to-be-mounted members, such as a tire, and also does not fall easily after mounting | wearing.

(A) is a perspective view which shows the mounting member of one Embodiment of this invention, (b) is sectional drawing which cut | disconnected the mounting member of FIG. 1 (a) in the surface which passes along the central axis c of a mounting member. is there. (A) is a fragmentary sectional view of the pneumatic tire which is an example of the to-be-mounted member in this invention, (b) is a side view of the pneumatic tire which is an example of the to-be-mounted member in this invention. FIG. (A) is a perspective view which shows the mounting member of other embodiment of this invention, (b) is a fragmentary sectional view which shows the state which mounted | wore the pneumatic tire with the mounting member of Fig.3 (a). .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A mounting member 1 shown in FIGS. 1A and 1B includes an insertion portion 3 and an exterior portion 5. The insertion portion 3 is inserted from the one end portion 3 a into the hole formed in the mounted member, and the exterior portion 5 extends from the other end portion 3 b of the insertion portion 3. In this example, the insertion portion 3 has a rod shape, the exterior portion 5 has a dish shape, the insertion portion 3 has a cylindrical shape with a constant diameter A1 and a height D1, and the exterior portion 5 has a constant diameter A2 and a thickness T1. It has a disk shape.

  The insertion portion 3 is made of an elastic body and has a loss coefficient of 0.17 or more. Moreover, in this example, the insertion part 3 has a tensile stress of 3.0 MPa or more at 25% elongation. Examples of the elastic body constituting the insertion portion 3 include thermoplastic elastomer (TPE), vulcanized rubber, various plastics, and inorganic compounds. The material of the exterior part 5 is not specifically limited, For example, it can be set as a thermoplastic elastomer (TPE), vulcanized rubber, various plastics, an inorganic compound, etc. Examples of the thermoplastic elastomer (TPE) include, for example, a trade name “Lavalon (registered trademark)” manufactured by Mitsubishi Chemical, which is a styrene thermoplastic elastomer, and a product name “thermolan (trade name) manufactured by Mitsubishi Chemical, which is an olefin thermoplastic elastomer. Registered trademark) ", and a product name" Primalloy (registered trademark) "manufactured by Mitsubishi Chemical Corporation, which is a polyester-based thermoplastic elastomer. Manufacture is easy when the material of the mounting member 1 is a thermoplastic elastomer (TPE), and durability can be improved when it is a vulcanized rubber.

  FIG.1 (b) is sectional drawing which cut | disconnected the mounting member 1 in the surface which passes along the central axis c shown to Fig.1 (a). The insertion portion 3 includes a central portion 7 extending in the insertion direction (vertical direction in FIG. 1B) from one end portion 3a to the other end portion 3b, and an outer peripheral portion 9 disposed on the outer peripheral side of the central portion 7. have. As described above, both the central portion 7 and the outer peripheral portion 9 constituting the insertion portion 3 are made of an elastic body and have a loss coefficient (tan δ) of 0.17 or more. Further, in this example, the central portion 7 and the outer peripheral portion 9 both have a tensile stress at 25% elongation of 3.0 MPa or more. In this example, the central portion 7 has a columnar shape with a diameter B1 with c as the central axis, and the exterior portion 9 has a cylindrical shape with a diameter A1 that similarly surrounds the outer peripheral surface of the central portion 7 with c as the central axis. The dynamic elastic modulus of the outer peripheral portion 9 at 30 ° C. and 1% strain is 10 or more smaller than that of the central portion 7 at 30 ° C. and 1% strain.

  As shown in FIG. 1B, the exterior part 5 can be composed of a main body part 11 and a bottom part 13. In this example, the bottom portion 13 has a disk shape with a diameter B2 and a thickness H1 with the central axis c, and forms a part of the bottom surface of the exterior portion 5 as shown in the figure. It is joined. The main body portion 11 and the bottom portion 13 may be formed as a single body, or may be combined as a separate body.

  FIG. 2A is a cross-sectional view partially showing a pneumatic tire (hereinafter also simply referred to as “tire”) 20 which is an example of a mounted member. Similar to a general pneumatic tire, the tire 20 includes a pair of sidewall portions 23 continuously extending on both sides of the tread portion 21 and a pair of bead portions 25 further continuously extending from the sidewall portions 23. The tire 20 includes a carcass 29 that extends in a toroidal manner between bead cores 27 embedded in the pair of bead portions 25 and is wound back from the inside to the outside with respect to the bead core 27. A belt 30 is provided on the outer peripheral side of the crown portion of the carcass. A protrusion 24 is formed on the sidewall 23 of the tire 20, and a hole 22 is formed in the protrusion 24. The hole 22 has a cylindrical shape, and its diameter A3 is set to be slightly smaller than the diameter A1 in the insertion portion 3 of the mounting member 1. The hole portion 22 extends from the outer surface 23 a of the sidewall portion 23 including the protruding portion 24 of the tire 20 toward the inner surface 23 b, and terminates inside the sidewall portion 23 including the protruding portion 24.

  When the mounting member 1 of the present embodiment is mounted on the tire 20, the mounting member 1 is directed from the outer side in the tire width direction toward the inner side with respect to the hole portion 22 of the tire 20 (the arrow direction in FIG. 2A). The insertion portion 3 can be mounted by inserting it from one end portion 3a. At this time, since the diameter A1 of the insertion portion 3 is slightly larger than the diameter A3 of the hole portion 22, the inner wall forming the hole portion 22 is elastic so that the hole portion 30 is expanded by being pushed by the insertion portion 3. Deform. The insertion portion 3 inserted into the hole 22 is held by the restoring force of the inner wall of the hole 22 and the mounting member 1 is mounted. The exterior portion 5 is disposed so as to be exposed to the outside of the hole portion 22. When removing the mounting member 1 from the tire 20, the mounting member 1 can be removed by holding and holding the exterior portion 5.

The mounting member 1 of the present embodiment can be easily mounted by inserting the insertion portion 3 into the hole portion 22 of the tire 20, and the loss factor of the insertion portion 3 is 0.17 or more, so Even if the insertion portion 3 is deformed in association with the deformation of the mounting member, the deformation can be converted into heat energy to suppress the dropout. If the loss factor is less than 0.17, the deformation is not sufficiently converted into thermal energy, and the drop-off suppressing effect may not be sufficiently obtained. Moreover, when the loss coefficient exceeds 0.3, it becomes difficult to insert. More preferably, the loss coefficient of the insertion portion 3 is desirably 0.17 or more and 0.25 or less, and in this case, the drop-off suppressing effect can be more reliably exhibited.
In particular, when the insertion portion 3 and the member to be mounted are rubber members, the mutual dynamic friction coefficient μ increases, and it becomes difficult to drop off.

  Further, the mounting member 1 of the present embodiment is mounted on a mounting member having flexibility such as the tire 20 by setting the tensile stress at 25% elongation of the insertion portion 3 to 3.0 MPa or more. Moreover, since it is hard to bend | fold when inserting in the hole part 22, mounting | wearing becomes easier. If the tensile stress at the time of 25% elongation of the insertion portion 3 is less than 3.0 MPa, the insertion portion 3 is likely to be bent when inserted into the hole portion 22 of the tire 20, and the attachment may be difficult. Moreover, when the tensile stress at the time of 25% expansion | extension of the insertion part 3 exceeds 15 Mpa, it may break at the time of insertion and may be damaged because it is too hard. More preferably, the tensile stress at 25% elongation of the insertion portion 3 is desirably 3 or more and 10 or less. In this case, the effect of facilitating the mounting can be more reliably exhibited.

  Moreover, the mounting member 1 of this embodiment has the center part 7 in the insertion part 3, and the outer peripheral part 9 arrange | positioned at the outer peripheral side of this central part 7, 30 degreeC of the outer peripheral part 9, and 1% of distortion | strain. Since the dynamic elastic modulus is 10 or more smaller than the dynamic elastic modulus at 30 ° C. and 1% of the strain of the central portion 7, the hardness of the outer peripheral portion 9 in contact with the inner wall of the hole 22 of the tire 20 is reduced. It is possible to easily follow the deformation of the tire 20 and enhance the drop-off suppressing effect. Further, since the dynamic elastic modulus of the central portion 9 at 30 ° C. and a strain of 1% is large, the insertion portion 3 is difficult to bend when inserted into the hole portion 22 and is easy to attach. Further, the difference in dynamic elastic modulus between the outer peripheral portion 9 and the central portion 7 at 30 ° C. and 1% strain is preferably 100 or less, and if it exceeds 100, the rigidity step becomes large and insertion becomes difficult. More preferably, the difference in dynamic elastic modulus between the outer peripheral portion 9 and the central portion 7 at 30 ° C. and 1% strain is preferably 20 or more and 80 or less. The effect of making can be demonstrated more reliably. From the viewpoint of facilitating mounting, the dynamic elastic modulus at 30 ° C. and 1% strain of the central portion 7 is preferably 40 or more, and more preferably 45 or more and 90 or less. Further, the dynamic elastic modulus of the outer peripheral portion 9 at 30 ° C. and 1% strain is preferably 15 or more and 55 or less, and in this case, the effect of suppressing the drop-off after mounting and the effect of facilitating mounting are more reliably exhibited. be able to.

  In addition, the mounting member 1 according to the present embodiment can decorate the outer surface 5a of the exterior portion 5 with a coloring or a pattern, and the mounting member 1 with the decoration on the exterior portion 5 is mounted on the tire 20. Thus, the user can easily apply a favorite decoration to the tire 20, improve the distinguishability, and impart design properties to the tire 20. In addition, it is preferable not to use the substance (for example, amine type | system | group anti-aging agent etc.) which has pollution property for the mounting member 1, According to this, the deterioration of a decorating property can be suppressed. The raw material of the mounting member 1 is not particularly limited, but at least a resin and a curing agent are blended as the raw material of the insertion portion 3 in order to achieve both the above appropriate loss factor and tensile stress at 25% elongation. It is desirable to do. In addition, it is more preferable that the mounting member 1, particularly at least the insertion portion 3, use rubber (for example, foamed rubber) whose volume is larger in the use temperature region of the tire than at normal temperature, and the drop-off suppressing effect can be further enhanced. . In this case, dinitrosopentamethylenetetramine, oxybisbenzenesulfonyl hydrazide, azodicarbonamide, sodium hydrogen carbonate, or the like can be used as a foaming agent. In addition, by applying foamed rubber to the insertion portion 3 of the mounting member 1, it is possible to follow the deformation of the tire 20 due to bubbles contained therein, and to suppress the destruction of the tire 20 and the mounting member 1 itself. You can also.

  The mounting member 1 of the present invention can be manufactured, for example, by injection molding, compression molding, or the like. Further, the mounting member 1 may be formed by integrally forming the insertion portion 3 and the exterior portion 5, or may be joined by bonding or the like after the insertion portion 3 and the exterior portion 5 are formed as separate bodies. In addition, the center part 7 and the outer peripheral part 9 of the insertion part 3, and the main-body part 11 and the bottom part 13 of the exterior part 5 may each be the same material, or a different material.

  Moreover, the diameter B1 of the cross section perpendicular | vertical to the insertion direction to the to-be-attached member of the insertion part 3 of the center part 7 is the range of 25 to 95% of the diameter A1 of the cross section perpendicular | vertical to the said insertion direction of the outer peripheral part 9. Preferably, according to this, attachment to a to-be-attached member can be facilitated more reliably, and the drop-off suppressing effect after attachment can be more reliably enhanced. If the diameter B1 of the cross section perpendicular to the insertion direction of the central portion 7 is less than 25% of the diameter A1 of the cross section perpendicular to the insertion direction of the outer peripheral portion 9, the effect of facilitating the mounting may not be sufficiently obtained. Yes, if it exceeds 95%, there is a possibility that the effect of suppressing dropout cannot be sufficiently obtained. From the same viewpoint, the diameter B1 is preferably 2 to 95% of the diameter A2, and more preferably 10 to 90%.

  In addition, the shape of the mounting member 1 is not limited to the shape of the said embodiment, It can select freely according to a use, productivity, etc. For example, the insertion portion 3 can have a tapered shape or a bent shape in addition to the cylindrical shape. When mounting on a tire as a mounting member, the exterior portion 5 is formed in a dish shape, so that the air resistance during traveling is small, and an area for decoration can be easily secured. Further, by making the insertion portion 3 into a rod shape, there is little resistance at the time of insertion and it is easy to mount.

  FIG. 3A shows a mounting member 31 as another embodiment of the present invention. The mounting member 31 includes an insertion portion 33 that is inserted from one end portion 33a into a hole formed in the mounted member, and an exterior portion 35 that extends from the other end portion 33b of the insertion portion 33. The insertion portion 33 is an elastic body. And the loss coefficient is 0.17 or more. Also in this example, the tensile stress at 25% elongation of the insertion portion 33 is 3.0 MPa or more. The exterior portion 35 extends from the insertion portion 33, is curved, and is formed so as to be substantially parallel to the insertion portion 33. For example, as shown in FIG. The mounting member 31 forms a U-shape in a cross-sectional view in the tire width direction when mounted on. The exterior portion 35 is exposed to the outside of the tire 40 as illustrated. The insertion portion 33a is disposed on the outer peripheral side of the central portion 37 extending in the insertion direction from the one end portion 33a to the other end portion 33b, and has a dynamic elastic modulus of 30 ° C. and 1% strain at the center. The outer peripheral portion 39 is smaller by 10 or more than the portion 37. When the mounting member 31 of the present embodiment is mounted on the tire 40, the hole 42 formed in the protruding portion 44 provided in the sidewall portion 43 of the tire 40 is directed from the inner side to the outer side in the tire radial direction. The insertion portion 33 is inserted from the one end portion 33a along the insertion direction (the arrow direction in FIG. 3B). Similarly to the exterior portion 5 of the mounting member 1 shown in FIGS. 1A and 1B, the outer surface 35a of the exterior portion 35 can be decorated, and the exterior portion 35 is decorated. By attaching the member 31 to the tire 40, the user can easily apply a favorite decoration to the tire 40. The mounting member 31 of this embodiment can suppress the drop-off after mounting by setting the loss coefficient of the insertion portion 33 to 0.17 or more, and the tensile stress when the insertion portion 3 is extended by 25% is 3. Mounting can be facilitated by setting the pressure to 0 MPa or more. In addition, the outer peripheral portion 39 of the insertion portion 3 is 30 ° C. and the dynamic elastic modulus with a strain of 1% is 10 or less smaller than that of the central portion 37, thereby facilitating the insertion more reliably and dropping after mounting. The suppression effect can be increased more reliably.

  In the above embodiment, the mounting members 1 and 31 have been described by way of example of a decorative member in which the exterior portion is decorated. However, the mounting member of the present invention is not limited to this, and a temperature sensor or a traveling device is provided inside. It may be a member provided with equipment such as history measurement or other members.

Next, a mounting member according to the present invention was made as a prototype and performance evaluation was performed, which will be described below.
In the mounting members of Examples 1 and 2 and Comparative Example 1, the insertion portion 3 of the mounting member 1 shown in FIGS. 1A and 1B is made of a single material. The mounting member 6 has the shape shown in FIGS. 1A and 1B, and the insertion portion is composed of a central portion and an outer peripheral portion.
The mounting members of the examples and comparative examples have the shapes shown in FIGS. 1A and 1B of the above embodiment, the height D1 of the insertion portion 3 is 9.5 mm, the diameter A2 of the exterior portion 5 is 20 mm, The thickness T1 is 2 mm, the diameter B2 of the bottom portion 13 is 10 mm, and the thickness H1 is 1 mm. Moreover, all the mounting members are formed integrally with the insertion portion and the exterior portion. In addition, each mounting member is formed with the composition shown in Table 1, loss factor (tan δ) of the insertion portion 3, tensile stress at 25% elongation, 30 ° C, dynamic elastic modulus of 1% strain, insertion portion 3 Table 1 shows the diameter A1 and the diameter B1 of the central portion 7.

  Ease of installation is achieved by forming a hole portion with a diameter of 2.4 mm and a depth of 10 mm in a cut-out sample of a sidewall portion of a tire that is a mounted member, and inserting the mounting members of the examples and comparative examples shown in Table 1 respectively. Workability at the time of mounting was evaluated in five stages. The results are shown in Table 1. (5: Easily installable, 4: Take some time for installation, 3: Take effort for installation, 2: Difficult to install, 1: Unmountable)

  With respect to the non-drop-off property, the embodiment shown in Table 1 and the hole portion having a diameter A3 of 2.4 mm and a depth of 10 mm formed in the sidewall portion 23 of the tire 20 shown in FIGS. Each of the mounting members of the comparative examples was inserted, the tire 20 was mounted on the vehicle, and the remaining rate after traveling 5000 km at a speed of 60 km / h was measured and evaluated. The result is expressed by an index with Comparative Example 1 being 100, and the larger the value, the higher the remaining rate (%) of the mounting member, and the more difficult it is to drop off. The results are shown in Table 1.

  From the results in Table 1, it can be seen that the mounting members of Examples 1 to 6 are easier to mount and less likely to fall off than the mounting member of Comparative Example 1.

  Thus, according to the present invention, it is possible to provide a mounting member that can be easily mounted on a mounted member such as a tire and that does not easily fall off after mounting.

  DESCRIPTION OF SYMBOLS 1, 31: Mounting member, 3, 33: Insertion part, 5, 35: Exterior part, 7, 37: Center part, 9, 39: Outer peripheral part 20, 40: Pneumatic tire (attachment member), 21: Tread Part, 22, 42: hole part, 23, 43: sidewall part, 25: bead part,

Claims (5)

An insertion part inserted from one end into the hole formed in the mounted member;
An exterior part extending from the other end of the insertion part,
The mounting member is characterized in that the insertion portion is made of an elastic body and has a loss coefficient of 0.17 or more.   The mounting member according to claim 1, wherein the insertion portion has a tensile stress of 3.0 MPa or more at 25% elongation. The insertion portion has a central portion extending in the insertion direction from the one end portion to the other end portion, and an outer peripheral portion disposed on the outer peripheral side of the central portion,
The mounting member according to claim 1, wherein a dynamic elastic modulus of 1% strain at 30 ° C. of the outer peripheral portion is 10 or more smaller than a dynamic elastic modulus of 1% strain at 30 ° C. of the central portion.   The mounting member according to claim 3, wherein a diameter of a cross section perpendicular to the insertion direction of the central portion is in a range of 25 to 95% of a diameter of a cross section perpendicular to the insertion direction of the outer peripheral portion.   The mounting member according to claim 3 or 4, wherein a dynamic elastic modulus with a strain of 1% at 30 ° C of the central portion is 75 or more.

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