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JP2006162562A - Method and apparatus for measuring rubber thickness of tire surface - Google Patents

Method and apparatus for measuring rubber thickness of tire surface Download PDF

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JP2006162562A
JP2006162562A JP2004358545A JP2004358545A JP2006162562A JP 2006162562 A JP2006162562 A JP 2006162562A JP 2004358545 A JP2004358545 A JP 2004358545A JP 2004358545 A JP2004358545 A JP 2004358545A JP 2006162562 A JP2006162562 A JP 2006162562A
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belt
magnet
rubber thickness
tire
tread surface
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JP4470720B2 (en
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Katsumichi Sekine
克理 関根
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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  • Tires In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for measuring the rubber thickness of a tire, capable of reducing apparatus cost and readily measuring the rubber thickness from a tread surface to a belt. <P>SOLUTION: A magnet 5 is arranged on the side of the tread surface 4, facing the belt 3 with a steel cord to be embedded into the tread 2 of the tire T which is arranged therein. Attraction force for attracting the magnet 5 to the belt 3, by the magnet force acting between the magnet 5 and the belt 3, is measured by an attraction measuring means 6. Based on the measured attraction, the rubber thickness s from the tread surface 4 to the belt 3 is calculated with a calculation processing method 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、タイヤ表面ゴム厚さ測定方法及び装置に関し、更に詳しくは、トレッド面からベルトまでのゴム厚さを容易に測定することができるタイヤ表面ゴム厚さ測定方法及び装置に関する。   The present invention relates to a tire surface rubber thickness measuring method and apparatus, and more particularly, to a tire surface rubber thickness measuring method and apparatus capable of easily measuring a rubber thickness from a tread surface to a belt.

従来、渦電流式センサーを使用して、タイヤのトレッド部におけるベルトまでのゴム厚さを測定する技術が知られている（例えば、特許文献１参照）。更生タイヤを製造する工程において、バフ加工後におけるトレッド部の表面からベルトまでのゴム厚さを測定するのに好ましく使用することができる。また、摩耗後のトレッド面からベルトまでのゴム厚さを測定し、その厚さと予め取得しておいた摩耗前のトレッド面からベルトまでのゴム厚さとを用いて、トレッド面の摩耗量を容易に得ることができる。   Conventionally, a technique for measuring a rubber thickness up to a belt in a tread portion of a tire using an eddy current sensor is known (see, for example, Patent Document 1). In the process of manufacturing a retreaded tire, it can be preferably used to measure the rubber thickness from the surface of the tread portion to the belt after buffing. In addition, the rubber thickness from the tread surface to the belt after wear is measured, and the wear amount on the tread surface is easily calculated by using the thickness and the rubber thickness from the tread surface before wear to the belt obtained in advance. Can get to.

しかしながら、渦電流の影響によりベルトを構成するスチールコードが加熱され、しかも数メガＨｚの交流電源が必要になるため、装置が高価になるという問題があった。
特開平８−３０４００９号公報 However, the steel cord constituting the belt is heated by the influence of the eddy current, and an AC power source of several megaHz is required, so that the apparatus becomes expensive.
JP-A-8-304209

本発明の目的は、装置コストを低減し、かつ加熱の問題もなくトレッド面からベルトまでのゴム厚さを容易に測定することが可能なタイヤ表面ゴム厚さ測定方法及び装置を提供することにある。   An object of the present invention is to provide a tire surface rubber thickness measuring method and apparatus capable of reducing the apparatus cost and easily measuring the rubber thickness from the tread surface to the belt without heating problems. is there.

上記目的を達成する本発明のタイヤ表面ゴム厚さ測定方法は、タイヤのトレッド部に埋設されるスチールコードを配列したベルトに対面してトレッド面側に磁石を配置し、該磁石と前記ベルトとの間に作用する磁力により前記磁石が前記ベルトに吸引される引力を測定し、該測定した引力に基づいて前記トレッド面から前記ベルトまでのゴム厚さを求めることを特徴とする。   In the tire surface rubber thickness measuring method of the present invention that achieves the above object, a magnet is arranged on a tread surface side facing a belt on which steel cords embedded in a tread portion of a tire are arranged, and the magnet, the belt, The attractive force of the magnet attracted to the belt is measured by the magnetic force acting between the two, and the rubber thickness from the tread surface to the belt is obtained based on the measured attractive force.

本発明のタイヤ表面ゴム厚さ測定装置は、タイヤのトレッド部に埋設されるスチールコードを配列したベルトに対面してトレッド面側に配置される磁石と、該磁石と前記ベルトとの間に作用する磁力により前記磁石が前記ベルトに吸引される引力を測定する引力測定手段と、該引力測定手段により測定した引力のデータに基づいて前記トレッド面から前記ベルトまでのゴム厚さを求める演算処理手段とを具備することを特徴とする。   The tire surface rubber thickness measuring device of the present invention acts between a magnet arranged on the tread surface side facing a belt on which steel cords embedded in a tread portion of a tire are arranged, and the magnet and the belt. An attractive force measuring means for measuring an attractive force by which the magnet is attracted to the belt by an applied magnetic force, and an arithmetic processing means for obtaining a rubber thickness from the tread surface to the belt based on attractive force data measured by the attractive force measuring means. It is characterized by comprising.

上述した本発明によれば、磁石とベルトとの間に作用する磁力を利用してトレッド面からベルトまでのゴム厚さを求めるようにしたので、トレッド面からベルトまでのゴム厚さを容易に測定することができる一方、ベルトを構成するスチールコードが加熱される問題もなく、また数メガＨｚの交流電源が必要になることもないため、装置コストを低減することができる。   According to the present invention described above, the rubber thickness from the tread surface to the belt is obtained using the magnetic force acting between the magnet and the belt, so that the rubber thickness from the tread surface to the belt can be easily obtained. While it can be measured, there is no problem that the steel cord constituting the belt is heated, and an AC power supply of several megaHz is not required, so that the apparatus cost can be reduced.

以下、本発明の実施の形態について添付の図面を参照しながら詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１，２は本発明のタイヤ表面ゴム厚さ測定装置の一実施形態を示し、このタイヤ表面ゴム厚さ測定装置１Ａは、タイヤＴのトレッド部２のゴム層２Ａに埋設されるスチールコードを配列したベルト３に対面してトレッド面４側に配置される磁石５と、この磁石５とベルト３との間に作用する磁力により磁石５がベルト３に吸引される引力を測定する引力測定手段６を備えている。   1 and 2 show an embodiment of a tire surface rubber thickness measuring apparatus according to the present invention. This tire surface rubber thickness measuring apparatus 1A is a steel cord embedded in a rubber layer 2A of a tread portion 2 of a tire T. Magnet 5 arranged on the tread surface 4 side so as to face the arranged belts 3, and attractive force measuring means for measuring the attractive force by which the magnets 5 are attracted to the belt 3 by the magnetic force acting between the magnets 5 and the belt 3. 6 is provided.

磁石５は永久磁石から構成されている。引力測定手段６が支持体７に取り付けられ、その引力測定手段６の下側に磁石５が支持体７の下面７ａから所定の距離ｎ(mm)をあけるようにして取り付けられている。   The magnet 5 is composed of a permanent magnet. The attractive force measuring means 6 is attached to the support 7, and the magnet 5 is attached to the lower side of the attractive force measuring means 6 at a predetermined distance n (mm) from the lower surface 7 a of the support 7.

引力測定手段６は、磁石５とベルト３との間に作用する磁力により磁石５がベルト３に吸引された時の引力を測定できるものであれば、いずれの手段を用いてもよく、例えば、ロードセルや、歪みゲージを用いたもの、圧電素子を利用したものなどを好ましく挙げることができる。また、吸引される時の引力をバネなどの変位として測定するようにした手段であってもよい。   The attractive force measuring means 6 may be any means as long as it can measure the attractive force when the magnet 5 is attracted to the belt 3 by the magnetic force acting between the magnet 5 and the belt 3. Preferred examples include a load cell, a strain gauge, and a piezoelectric element. Moreover, the means which measured the attractive force at the time of attraction | suction as displacement, such as a spring, may be sufficient.

引力測定手段６にパソコン８が接続されている。パソコン８は、演算処理手段（ＣＰＵ）９、表示部１０、メモリ１１、キーボード１２を備えている。演算処理手段９は、予めインストールされたプログラムに従って、引力測定手段６から入力された引力のデータに基づいてトレッド面４からベルト３までの距離（ゴム厚さ）を算出するようになっている。   A personal computer 8 is connected to the attractive force measuring means 6. The personal computer 8 includes an arithmetic processing means (CPU) 9, a display unit 10, a memory 11, and a keyboard 12. The arithmetic processing means 9 calculates the distance (rubber thickness) from the tread surface 4 to the belt 3 based on the attractive force data input from the attractive force measuring means 6 according to a program installed in advance.

即ち、磁石５がベルト３に吸引される引力は、図３に示すように、トレッド面３に対面する磁石５の磁極面５ａからベルト３までの距離ｒの二乗に反比例する関係にあり、磁石５とベルト３の磁力と引力が分かると、磁極面５ａからベルト３までの距離ｒを求めることができる。   That is, the attractive force by which the magnet 5 is attracted to the belt 3 is inversely proportional to the square of the distance r from the magnetic pole surface 5a of the magnet 5 facing the tread surface 3 to the belt 3, as shown in FIG. If the magnetic force and attractive force of the belt 5 and the belt 3 are known, the distance r from the magnetic pole surface 5a to the belt 3 can be obtained.

トレッド面４からベルト３までの距離（ゴム厚さ）をｓ(mm)とすると、距離ｓは磁石５の磁極面５ａからベルト３までの距離ｒ(mm)から距離ｎ(mm)を引くことで算出される。   When the distance (rubber thickness) from the tread surface 4 to the belt 3 is s (mm), the distance s is obtained by subtracting the distance n (mm) from the distance r (mm) from the magnetic pole surface 5a of the magnet 5 to the belt 3. Is calculated by

キーボード１２から予め磁石５の磁力、ベルト３の磁力、距離ｎ等の各データがインプットされ、メモリ１１に記憶されており、演算処理手段９は、引力測定手段６から引力の測定信号が入力されると、メモリ１１に記憶された各データを用いてトレッド面４からベルト３までの距離ｓを算出する。   Data such as the magnetic force of the magnet 5, the magnetic force of the belt 3, and the distance n are input in advance from the keyboard 12 and stored in the memory 11. The arithmetic processing means 9 receives an attractive force measurement signal from the attractive force measuring means 6. Then, the distance s from the tread surface 4 to the belt 3 is calculated using each data stored in the memory 11.

また、メモリ１１には、タイヤ新品時の摩耗前のトレッド面４からベルト３までの距離（ゴム厚さ）ｑ(mm)のデータが記憶されており、演算処理手段９は、この予めインプットされた距離ｑのデータと算出された距離ｓのデータとの差（ｑ−ｓ）を演算し、トレッド面３の摩耗量を算出できるようになっている。距離ｑのデータは、各タイヤ毎のデータであってもよく、また摩耗前のトレッド面４からベルト３までの距離（ゴム厚さ）が同じ種類のタイヤ毎のデータであってもよい。算出された距離ｓのデータ及び摩耗量のデータは、表示部１０に表示されると共に、メモリ１１に記憶されるようになっている。   The memory 11 stores data on the distance (rubber thickness) q (mm) from the tread surface 4 to the belt 3 before wearing when the tire is new, and the arithmetic processing means 9 inputs this data in advance. The amount of wear of the tread surface 3 can be calculated by calculating the difference (q-s) between the data of the distance q and the data of the calculated distance s. The data of the distance q may be data for each tire, or may be data for each tire of the same type in which the distance (rubber thickness) from the tread surface 4 to the belt 3 before wear is the same. The calculated distance s data and wear amount data are displayed on the display unit 10 and stored in the memory 11.

以下、図４を参照しながら、上述した装置による本発明のタイヤ表面ゴム厚さ測定方法について説明する。   Hereinafter, the tire surface rubber thickness measuring method of the present invention using the above-described apparatus will be described with reference to FIG.

図１に示すように、支持体７の下面７ａをトレッド面４に当接させる。これにより、スチールコードを配列したベルト３に対面してトレッド面４側に磁石５が配置される（ステップ１）。磁石５が配置されると、磁石５とベルト３との間に作用する磁力により磁石５がベルト３に吸引され、その吸引された引力が引力測定手段６で測定される（ステップ２）。   As shown in FIG. 1, the lower surface 7 a of the support 7 is brought into contact with the tread surface 4. Thereby, the magnet 5 is arrange | positioned on the tread surface 4 side facing the belt 3 which arranged the steel cord (step 1). When the magnet 5 is disposed, the magnet 5 is attracted to the belt 3 by the magnetic force acting between the magnet 5 and the belt 3, and the attracted attractive force is measured by the attractive force measuring means 6 (step 2).

引力測定手段６から引力の測定信号が演算処理手段９に入力され、その引力の値に基づいてトレッド面４からベルト３までの距離ｓを演算処理手段９が算出し、距離ｓを求める（ステップ３）。   An attractive force measurement signal is input from the attractive force measuring means 6 to the arithmetic processing means 9, and the arithmetic processing means 9 calculates the distance s from the tread surface 4 to the belt 3 based on the value of the attractive force, thereby obtaining the distance s (step). 3).

次いで、測定開始時にトレッド面４の摩耗量の測定が選択されている場合には、演算処理手段９が求められた距離ｓのデータと予め取得してインプットされた摩耗前のトレッド面からベルト３までの距離ｑとの差（ｑ−ｓ）を演算し、トレッド面４の摩耗量を算出する（ステップ４）。算出された距離ｓと摩耗量のデータは、表示部１０に表示され、かつメモリ１１に記憶される（ステップ５）。   Next, when the measurement of the wear amount of the tread surface 4 is selected at the start of the measurement, the belt 3 is calculated from the data of the distance s obtained by the arithmetic processing means 9 and the tread surface before the wear obtained and inputted in advance. The difference (q-s) from the distance q is calculated, and the wear amount of the tread surface 4 is calculated (step 4). The calculated distance s and wear amount data are displayed on the display unit 10 and stored in the memory 11 (step 5).

測定開始時にトレッド面４の摩耗量の測定が選択されていない場合には、ステップ３からステップ５に飛び、算出された距離ｓのデータが表示部１０に表示され、かつメモリ１１に記憶される。   If measurement of the amount of wear on the tread surface 4 is not selected at the start of measurement, the process jumps from step 3 to step 5, and data of the calculated distance s is displayed on the display unit 10 and stored in the memory 11. .

上述した本発明によれば、磁石５とベルト３との間に作用する磁力を利用してトレッド面４からベルト３までの距離を求めるようにしたので、トレッド面４からベルト３までの距離ｓであるゴム厚さの測定を容易に行いながら、ベルトを構成するスチールコードが加熱される問題もなく、また数メガＨｚの交流電源が必要になることもないため、装置コストを低く抑えることができる。   According to the above-described present invention, since the distance from the tread surface 4 to the belt 3 is obtained using the magnetic force acting between the magnet 5 and the belt 3, the distance s from the tread surface 4 to the belt 3 is determined. While measuring the rubber thickness easily, there is no problem of heating the steel cord constituting the belt, and there is no need for an AC power supply of several megaHz, so that the apparatus cost can be kept low. it can.

また、求められた距離ｓのデータと予め取得した摩耗前のトレッド面からベルト３までの距離ｑのデータからトレッド面の摩耗量も容易に測定することができる。   In addition, the wear amount of the tread surface can be easily measured from the data of the obtained distance s and the data of the distance q from the tread surface before wear acquired to the belt 3 in advance.

図５，６は、本発明のタイヤ表面ゴム厚さ測定装置の他の実施形態を示す。このタイヤ表面ゴム厚さ測定装置１Ｂは、トレッド面４を１周にわたって測定する際に使用され、上述したタイヤ表面ゴム厚さ測定装置１Ａにおいて、更に支持体７の下端部に車輪（移動手段）１３が設置され、支持体７に装着した磁石５と引力測定手段６を含む装置本体１８がトレッド面４上をトレッド面４に沿って移動可能になっている。   5 and 6 show another embodiment of the tire surface rubber thickness measuring device of the present invention. This tire surface rubber thickness measuring device 1B is used when measuring the tread surface 4 over one round. In the tire surface rubber thickness measuring device 1A described above, a wheel (moving means) is further provided at the lower end of the support 7. 13 is installed, and the apparatus main body 18 including the magnet 5 attached to the support 7 and the attractive force measuring means 6 is movable along the tread surface 4 on the tread surface 4.

また、ロータリーエンコーダ（パルス発生手段）１４が１つの車輪１３に対面して支持体７に取り付けられている。支持体７に面する車輪１３の側面には周方向に一定の間隔で複数の検知用突起（不図示）が突設され、この検知用突起がロータリーエンコーダ１４の検知部（不図示）の近傍を通過する毎にパルス信号を発生するようになっている。ロータリーエンコーダ１４はパソコン８に接続されている。   A rotary encoder (pulse generating means) 14 is attached to the support 7 so as to face one wheel 13. A plurality of detection projections (not shown) are provided on the side surface of the wheel 13 facing the support 7 at regular intervals in the circumferential direction, and these detection projections are in the vicinity of the detection unit (not shown) of the rotary encoder 14. A pulse signal is generated every time the signal passes through. The rotary encoder 14 is connected to the personal computer 8.

演算処理手段９は引力測定手段６から連続的に入力される測定信号を、ロータリーエンコーダ１４からパルス信号が入力される毎にサンプリングし、各サンプリング位置での距離ｓを算出するようになっている。なお、ここで用いられる距離ｎは、磁石５の下端からトレッド面４までの距離である。   The arithmetic processing means 9 samples the measurement signal continuously input from the attractive force measuring means 6 every time a pulse signal is input from the rotary encoder 14, and calculates the distance s at each sampling position. . The distance n used here is a distance from the lower end of the magnet 5 to the tread surface 4.

更に、トレッド面４の摩耗量を測定する場合には、タイヤ１周分の得られた距離ｓのデータ群のフィルター処理を行う。これは、トレッド面４に形成される溝などに車輪１３が入った状態で測定された正確でないデータを排除するものである。このフィルター処理は、必ずしも行う必要はないが、データ精度を高める上で行うのが好ましい。フィルター処理に代えて、平均処理（ある位置のデータを含む連続した複数のデータの平均値をある位置のデータとする処理）を行うようにしてもよい。   Furthermore, when measuring the amount of wear of the tread surface 4, the data group of the distance s obtained for one round of the tire is filtered. This eliminates inaccurate data measured with the wheel 13 in a groove or the like formed on the tread surface 4. This filtering process is not necessarily performed, but is preferably performed to improve data accuracy. Instead of the filter process, an average process (a process in which an average value of a plurality of continuous data including data at a certain position is used as data at a certain position) may be performed.

フィルター処理後、演算処理手段９は、各サンプリング位置で得られた距離ｓのデータにおいて差（ｑ−ｓ）を演算し、トレッド面４の摩耗量を各位置でそれぞれ算出するが、更に各サンプリング位置での摩耗量の差が予めメモリ１１に入力された設定閾値より大きい値が予め設定した所定数連続して発生しているか否か判定する。発生していると判定した場合には、フラットスポット（部分的にトレッド面４がフラット状に摩耗した部分）の発生があると判断し、フラットスポットの発生あることを表示部１０に表示するようになっている。   After the filter processing, the arithmetic processing means 9 calculates a difference (q−s) in the data of the distance s obtained at each sampling position, and calculates the wear amount of the tread surface 4 at each position. It is determined whether or not the difference between the wear amounts at the positions is continuously generated for a predetermined number of times that is larger than a preset threshold value input in advance to the memory 11. When it is determined that a flat spot has occurred, it is determined that a flat spot (part of which the tread surface 4 is partially worn) is generated, and the display unit 10 displays that the flat spot is generated. It has become.

上述したタイヤ表面ゴム厚さ測定装置１Ｂは、タイヤを回転可能に支持するタイヤ回転支持装置にタイヤを取り付けてタイヤ表面ゴム厚さを測定したり、あるいは車両にタイヤを取り付けた状態でタイヤ表面ゴム厚さを測定することができる。   The tire surface rubber thickness measuring apparatus 1B described above measures the tire surface rubber thickness by attaching the tire to a tire rotation support device that rotatably supports the tire, or with the tire attached to the vehicle. Thickness can be measured.

タイヤ回転支持装置にタイヤを取り付けてタイヤ表面ゴム厚さを測定する場合には、先ず、タイヤ回転支持装置に取り付けたタイヤＴのトレッド面４に、図５に示すように車輪１３を当接させる。これにより、スチールコードを配列したベルト３に対面してトレッド面４側に磁石５が配置される（図７のステップ１０１）。好ましくは、トレッド面４の測定開始位置に印を付し、その位置に磁石５を配置するのがよい。これにより、ロータリーエンコーダ１４から出力されるパルス信号を用いて、得られた各距離ｓ及び各摩耗量のデータの測定位置を容易に知ることができる。   When the tire is attached to the tire rotation support device and the tire surface rubber thickness is measured, first, the wheel 13 is brought into contact with the tread surface 4 of the tire T attached to the tire rotation support device as shown in FIG. . Thereby, the magnet 5 is arrange | positioned on the tread surface 4 side facing the belt 3 which arranged the steel cord (step 101 of FIG. 7). Preferably, a measurement start position on the tread surface 4 is marked, and the magnet 5 is disposed at that position. Thereby, using the pulse signal output from the rotary encoder 14, it is possible to easily know the measured positions of the obtained distance s and wear amount data.

磁石５が配置されると、磁石５とベルト３との間に作用する磁力により磁石５がベルト３に吸引され、その吸引された引力が引力測定手段６で測定される。タイヤ回転支持装置によりタイヤＴを１回転させることにより、装置本体１８をトレッド面４に沿って１周移動させ、引力測定手段６によりトレッド面４を１周にわたって磁石５がベルト３に吸引される引力を連続的に測定する（図７のステップ１０２）。   When the magnet 5 is disposed, the magnet 5 is attracted to the belt 3 by the magnetic force acting between the magnet 5 and the belt 3, and the attracted attractive force is measured by the attractive force measuring means 6. By rotating the tire T once by the tire rotation support device, the apparatus main body 18 is moved once along the tread surface 4, and the magnet 5 is attracted to the belt 3 by the attractive force measuring means 6 over the entire tread surface 4. The attractive force is continuously measured (step 102 in FIG. 7).

演算処理手段９では、引力測定手段６から連続して逐次入力される引力の測定信号をロータリーエンコーダ１４からパルス信号が入力される毎にサンプリングし、各サンプリング位置でトレッド面４からベルト３までの距離ｓを算出し、タイヤ１周にわたってトレッド面４の各位置での距離ｓを求める（図７のステップ１０３）。   The arithmetic processing means 9 samples an attractive force measurement signal continuously inputted from the attractive force measuring means 6 every time a pulse signal is inputted from the rotary encoder 14, and from the tread surface 4 to the belt 3 at each sampling position. The distance s is calculated, and the distance s at each position of the tread surface 4 is obtained over one circumference of the tire (step 103 in FIG. 7).

次いで、測定開始時にトレッド面４の摩耗量の測定が選択されている場合には、タイヤ１周分の得られた距離ｓのデータ群のフィルター処理を行い、得られたフィルター処理後の距離ｓの各データと予め取得してインプットされた摩耗前のトレッド面からベルト３までの距離ｑとの差（ｑ−ｓ）を演算し、タイヤ１周にわたって各位置でのトレッド面４の摩耗量の値を算出する（図７のステップ１０４）。算出された距離ｓと摩耗量のデータは、表示部１０に表示され、かつメモリ１１に記憶される（図７のステップ１０５）。   Next, when the measurement of the wear amount of the tread surface 4 is selected at the start of measurement, the data group of the distance s obtained for one round of the tire is filtered, and the obtained distance s after the filter processing is performed. And the difference (q-s) between the distance q from the tread surface before wear inputted in advance and input to the belt 3 is calculated, and the wear amount of the tread surface 4 at each position is calculated over one circumference of the tire. A value is calculated (step 104 in FIG. 7). The calculated distance s and wear amount data are displayed on the display unit 10 and stored in the memory 11 (step 105 in FIG. 7).

また、演算処理手段９では、各位置でのトレッド面４の摩耗量の値が算出されると、各摩耗量の値の差が予めメモリ１１に入力された設定閾値より大きい値が予め設定した所定数連続して発生しているか否か判定する（図７のステップ１０６）。   Further, when the value of the wear amount of the tread surface 4 at each position is calculated in the arithmetic processing means 9, a value larger than the set threshold value previously input to the memory 11 is set in advance so that the difference between the wear amount values is preset. It is determined whether or not a predetermined number of occurrences occur (step 106 in FIG. 7).

発生していると判定した場合には、フラットスポットの発生があると判断し、フラットスポットの発生があることを表示部１０に表示させる。（図７のステップ１０７）。   If it is determined that a flat spot has occurred, it is determined that a flat spot has occurred, and the display unit 10 displays that a flat spot has occurred. (Step 107 in FIG. 7).

車両にタイヤを取り付けた状態でタイヤ表面ゴム厚さを測定する場合には、図８に示すように、測定するタイヤＴのサイドウォール面Ｔ１に反射テープ３０を少なくとも１つ、好ましくは所定の間隔（フラットスポットの発生位置を容易に検知するため）で貼り付け、フォトセンサーなどにより反射テープ３０の通過を検知してタイヤＴが１回転したことを分かるようにする。後は、図７に示す工程と同様の工程で行われる。   When measuring the tire surface rubber thickness with the tire attached to the vehicle, as shown in FIG. 8, at least one reflective tape 30 is provided on the sidewall surface T1 of the tire T to be measured, preferably at a predetermined interval. It is pasted (to easily detect the position where the flat spot is generated), and the passage of the reflective tape 30 is detected by a photo sensor or the like so that the tire T has made one rotation. The subsequent steps are the same as the steps shown in FIG.

図５，６に示す実施形態では、上述した効果に加えて、トレッド面４からベルト３までの距離ｓをタイヤ１周にわたって容易に測定することができる。また、フラットスポットの発生の有無も容易に検知することが可能になる。   In the embodiment shown in FIGS. 5 and 6, in addition to the effects described above, the distance s from the tread surface 4 to the belt 3 can be easily measured over one circumference of the tire. In addition, it is possible to easily detect whether or not a flat spot is generated.

図９，１０は本発明のタイヤ表面ゴム厚さ測定装置の更に他の実施形態を示す。このタイヤ表面ゴム厚さ測定装置１Ｃは、上述したタイヤ表面ゴム厚さ測定装置１Ｂにおいて、磁石５に電磁石５Ｘを用いたものである。電磁石５Ｘには電源１５と電磁石５Ｘのコイルに流れる電流を検知する電流検出手段１６が接続され、電流検出手段１６がパソコン８に接続されている。   9 and 10 show still another embodiment of the tire surface rubber thickness measuring device of the present invention. This tire surface rubber thickness measuring apparatus 1C uses the electromagnet 5X as the magnet 5 in the tire surface rubber thickness measuring apparatus 1B described above. The electromagnet 5 </ b> X is connected to a power source 15 and current detection means 16 for detecting a current flowing in the coil of the electromagnet 5 </ b> X, and the current detection means 16 is connected to the personal computer 8.

電磁石５Ｘのコイルを流れる電流の大きさと電磁石５Ｘの磁力とは比例関係にある。そこで、電流検出手段１５で検出された電流値に基づき、演算処理手段９がメモリ１１に予め記憶させた電流値に対応する磁力のデータテーブルから電磁石５Ｘの磁力の値を求め、それを使ってトレッド面４からベルト３までの距離ｓを算出するようになっている。   The magnitude of the current flowing through the coil of the electromagnet 5X is proportional to the magnetic force of the electromagnet 5X. Therefore, based on the current value detected by the current detection means 15, the arithmetic processing means 9 obtains the value of the magnetic force of the electromagnet 5X from the magnetic force data table corresponding to the current value stored in the memory 11 in advance, and uses it. A distance s from the tread surface 4 to the belt 3 is calculated.

この図９，１０に示す実施形態では、上述した図５，６に示す実施形態で述べた効果に加えて、必要に応じて磁力の大きさを調整することができる利点がある。   The embodiment shown in FIGS. 9 and 10 has an advantage that the magnitude of the magnetic force can be adjusted as necessary in addition to the effects described in the embodiment shown in FIGS.

本発明において、磁石５は、その磁束密度が３００ｍＴ以上、トレッド面４に対面する磁石５の磁極面５ａの面積が１ｃｍ2 以上となるものを使用するのが、測定の際に十分な引力を得る上で好ましい。磁束密度は、より好ましくは、４００ｍＴ以上がよい。磁束密度の上限値は特に限定されるものではないが、実際に入手可能な範囲としては、６００ｍＴ程度である。また、磁極面５ａの面積の上限値は、測定精度を損なわないために５００ｃｍ2 以下にするのがよい。 In the present invention, the magnet 5 having a magnetic flux density of 300 mT or more and an area of the magnetic pole surface 5a of the magnet 5 facing the tread surface 4 of 1 cm 2 or more has a sufficient attractive force during measurement. It is preferable in obtaining. More preferably, the magnetic flux density is 400 mT or more. The upper limit value of the magnetic flux density is not particularly limited, but the actually available range is about 600 mT. The upper limit of the area of the magnetic pole surface 5a is preferably 500 cm 2 or less so as not to impair measurement accuracy.

また、各タイヤ表面ゴム厚さ測定装置１Ａ，１Ｂ，１Ｃは、ベルト３を脱磁する脱磁手段２０を備えるようにするのが好ましい。磁石５を用いて測定するため、測定終了後にベルト３が着磁する可能性がある。そこで、測定が完了した後、脱磁手段２０によりベルト３を脱磁するのである。   Each tire surface rubber thickness measuring device 1A, 1B, 1C preferably includes a demagnetizing means 20 for demagnetizing the belt 3. Since measurement is performed using the magnet 5, the belt 3 may be magnetized after the measurement is completed. Therefore, after the measurement is completed, the belt 3 is demagnetized by the demagnetizing means 20.

他方、スチールコードを配列したベルト３は、使用環境によっては、着磁している場合がある。着磁していると、予めメモリ１１に記憶させたベルト３の磁力のデータと相違するため、正確な測定ができない。そこで、磁石５を配置する前に脱磁手段２０によりベルト３を脱磁するようにするのが好ましい。   On the other hand, the belt 3 on which the steel cords are arranged may be magnetized depending on the use environment. When magnetized, it is different from the magnetic force data of the belt 3 stored in the memory 11 in advance, so that accurate measurement cannot be performed. Therefore, it is preferable to demagnetize the belt 3 by the demagnetizing means 20 before arranging the magnet 5.

また、通常、ベルト面の磁力変動は数ｍＴ×１０-1と非常に小さいため、上述した測定では影響がないと考えられるが、それを排除するためにも、磁石５を配置する前に脱磁手段２０によりベルト３を脱磁するようにしてもよい。 In addition, since the fluctuation of the magnetic force on the belt surface is usually as small as several mT × 10 −1 , it is considered that there is no effect in the above-described measurement. The belt 3 may be demagnetized by the magnetic means 20.

脱磁手段２０としては、従来公知のものが使用でき、例えば、交流減衰脱磁法を用いたものを好ましく挙げることができる。脱磁手段２０をタイヤＴのトレッド面４に対面して配置し、タイヤＴを回転させる一方、脱磁手段２０のコイルに交流電流を流して交流磁場を発生さえ、その交流磁場を次第に減衰させることにより、ベルト３を脱磁する。   As the demagnetizing means 20, conventionally known ones can be used. For example, one using an AC attenuation demagnetizing method can be preferably mentioned. The demagnetizing means 20 is disposed facing the tread surface 4 of the tire T and rotates the tire T. On the other hand, even if an alternating current is caused to flow through the coil of the demagnetizing means 20 to generate an alternating magnetic field, the alternating magnetic field is gradually attenuated. As a result, the belt 3 is demagnetized.

また、上述した実施形態では、トレッド面４からベルト３までの距離ｓを測定した引力から演算により求めるようにしたが、予め実験により距離と引力の関係を示すデータを各種取得し、それをテーブルにしてメモリ１１に記憶させ、そのデータテーブルを参照して測定された引力から対応する距離ｒを得、その距離ｒから距離ｓを算出するようにしてもよい。   In the above-described embodiment, the distance s from the tread surface 4 to the belt 3 is obtained by calculation from the measured attractive force. However, various data indicating the relationship between the distance and the attractive force are obtained in advance by experiment and stored in a table. Then, the corresponding distance r may be obtained from the attractive force measured by referring to the data table, and the distance s may be calculated from the distance r.

また、図５，９に示す実施形態では、トレッド面４をタイヤ周方向に沿って測定する例を示したが、タイヤ幅方向に装置本体１８を移動させ、タイヤ幅方向におけるトレッド面４からベルト３までの距離（ゴム厚さ）ｓ及び摩耗量を測定するようにしてもよい。   5 and 9, the example in which the tread surface 4 is measured along the tire circumferential direction has been shown. However, the apparatus main body 18 is moved in the tire width direction, and the belt extends from the tread surface 4 in the tire width direction. The distance (rubber thickness) s up to 3 and the wear amount may be measured.

本発明のタイヤ表面ゴム厚さ測定装置の一実施形態を示す正面説明図である。It is front explanatory drawing which shows one Embodiment of the tire surface rubber | gum thickness measuring apparatus of this invention. 図１の装置のブロック図である。FIG. 2 is a block diagram of the apparatus of FIG. 1. 引力と距離の関係を示すグラフ図である。It is a graph which shows the relationship between attractive force and distance. 本発明のタイヤ表面ゴム厚さ測定方法の一実施形態を示すフロー図である。It is a flowchart which shows one Embodiment of the tire surface rubber | gum thickness measuring method of this invention. 本発明のタイヤ表面ゴム厚さ測定装置の他の実施形態を示す正面説明図である。It is front explanatory drawing which shows other embodiment of the tire surface rubber | gum thickness measuring apparatus of this invention. 図５の装置のブロック図である。FIG. 6 is a block diagram of the apparatus of FIG. 本発明のタイヤ表面ゴム厚さ測定方法の他の実施形態を示すフロー図である。It is a flowchart which shows other embodiment of the tire surface rubber | gum thickness measuring method of this invention. 車両にタイヤを取り付けた状態で表面ゴム厚さを測定する場合のタイヤの説明図である。It is explanatory drawing of a tire in the case of measuring surface rubber thickness in the state which attached the tire to the vehicle. 本発明のタイヤ表面ゴム厚さ測定装置の更に他の実施形態を示す正面説明図である。It is front explanatory drawing which shows other embodiment of the tire surface rubber | gum thickness measuring apparatus of this invention. 図９の装置のブロック図である。FIG. 10 is a block diagram of the apparatus of FIG. 9.

符号の説明Explanation of symbols

１Ａ，１Ｂ，１Ｃ タイヤ表面ゴム厚さ測定装置
２ トレッド部
３ ベルト
４ トレッド面
５ 磁石
５Ｘ 電磁石
５ａ 磁極面
６ 引力測定手段
９ 演算処理手段
１３ 車輪（移動手段）
１４ ロータリーエンコーダ（パルス発生手段）
１８ 装置本体
２０ 脱磁手段
Ｔ タイヤ
ｒ 距離
ｓ 距離（ゴム厚さ） 1A, 1B, 1C Tire surface rubber thickness measuring device 2 Tread part 3 Belt 4 Tread surface 5 Magnet 5X Electromagnet 5a Magnetic pole surface 6 Attracting force measuring means 9 Arithmetic processing means 13 Wheel (moving means)
14 Rotary encoder (pulse generation means)
18 Device body 20 Demagnetizing means T Tire r Distance s Distance (Rubber thickness)

Claims (11)

タイヤのトレッド部に埋設されるスチールコードを配列したベルトに対面してトレッド面側に磁石を配置し、該磁石と前記ベルトとの間に作用する磁力により前記磁石が前記ベルトに吸引される引力を測定し、該測定した引力に基づいて前記トレッド面から前記ベルトまでのゴム厚さを求めるタイヤ表面ゴム厚さ測定方法。   A magnet is arranged on the tread surface side facing a belt on which steel cords embedded in a tread portion of a tire are arranged, and the attractive force that the magnet is attracted to the belt by a magnetic force acting between the magnet and the belt A tire surface rubber thickness measurement method for measuring a rubber thickness from the tread surface to the belt based on the measured attractive force. 前記求められたゴム厚さと予め取得した摩耗前のトレッド面から前記ベルトまでのゴム厚さとからトレッド面の摩耗量を求める請求項１に記載のタイヤ表面ゴム厚さ測定方法。   The tire surface rubber thickness measurement method according to claim 1, wherein a wear amount of the tread surface is obtained from the obtained rubber thickness and a previously obtained rubber thickness from the tread surface before wear to the belt. 前記磁石は、磁束密度が３００ｍＴ以上で、かつ前記トレッド面に対面する磁極面の面積が１ｃｍ2 以上である請求項１または２に記載のタイヤ表面ゴム厚さ測定方法。 The tire surface rubber thickness measuring method according to claim 1 or 2, wherein the magnet has a magnetic flux density of 300 mT or more and an area of a magnetic pole face facing the tread surface is 1 cm 2 or more. 前記磁石が永久磁石である請求項１，２または３に記載のタイヤ表面ゴム厚さ測定方法。   The tire surface rubber thickness measuring method according to claim 1, wherein the magnet is a permanent magnet. タイヤのトレッド部に埋設されるスチールコードを配列したベルトに対面してトレッド面側に配置される磁石と、該磁石と前記ベルトとの間に作用する磁力により前記磁石が前記ベルトに吸引される引力を測定する引力測定手段と、該引力測定手段により測定した引力のデータに基づいて前記トレッド面から前記ベルトまでのゴム厚さを求める演算処理手段とを具備するタイヤ表面ゴム厚さ測定装置。   The magnet is attracted to the belt by a magnet disposed on the tread surface side facing a belt on which steel cords embedded in a tread portion of the tire are arranged, and a magnetic force acting between the magnet and the belt. A tire surface rubber thickness measuring device comprising: an attractive force measuring means for measuring an attractive force; and an arithmetic processing means for obtaining a rubber thickness from the tread surface to the belt based on attractive force data measured by the attractive force measuring means. 前記演算処理手段は、前記求められたゴム厚さのデータと予めインプットされた摩耗前のトレッド面から前記ベルトまでのゴム厚さのデータとからトレッド面の摩耗量を算出する請求項５に記載のタイヤ表面ゴム厚さ測定装置。   The said arithmetic processing means calculates the abrasion amount of a tread surface from the data of the calculated | required rubber | gum thickness, and the data of the rubber | gum thickness from the tread surface before abrasion inputted in advance to the said belt. Tire surface rubber thickness measuring device. 前記磁石と前記引力測定手段を含む装置本体を前記トレッド面上を移動可能な移動手段を具備する請求項５または６に記載のタイヤ表面ゴム厚さ測定装置。   The tire surface rubber thickness measuring device according to claim 5 or 6, further comprising moving means capable of moving an apparatus main body including the magnet and the attractive force measuring means on the tread surface. 前記磁石は、磁束密度が３００ｍＴ以上で、かつ前記トレッド面に対面する磁極面の面積が１ｃｍ2 以上である請求項５，６または７に記載のタイヤ表面ゴム厚さ測定装置。 The tire surface rubber thickness measuring device according to claim 5, 6 or 7, wherein the magnet has a magnetic flux density of 300 mT or more and an area of a magnetic pole surface facing the tread surface is 1 cm 2 or more. 前記磁石が永久磁石である請求項５，６，７または８に記載のタイヤ表面ゴム厚さ測定装置。   The tire surface rubber thickness measuring device according to claim 5, 6, 7, or 8, wherein the magnet is a permanent magnet. 前記磁石が電磁石である請求項５，６，７または８に記載のタイヤ表面ゴム厚さ測定装置。   The tire surface rubber thickness measuring device according to claim 5, 6, 7, or 8, wherein the magnet is an electromagnet. 前記ベルトを脱磁する脱磁手段を備えた請求項５乃至１０のいずれか１項に記載のタイヤ表面ゴム厚さ測定装置。
The tire surface rubber thickness measuring device according to any one of claims 5 to 10, further comprising a demagnetizing means for demagnetizing the belt.
JP2004358545A 2004-12-10 2004-12-10 Tire surface rubber thickness measuring device Expired - Fee Related JP4470720B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9011203B2 (en) 2007-03-29 2015-04-21 Michelin Recherche Et Technique S.A. Retread tire buffing with multiple response curves
JPWO2020145012A1 (en) * 2019-01-09 2021-10-21 アルプスアルパイン株式会社 Tire wear measuring device

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5573803U (en) * 1978-11-15 1980-05-21
JPS58182805A (en) * 1982-04-21 1983-10-25 Kawasaki Heavy Ind Ltd automatic demagnetizer
JPS6235210U (en) * 1985-08-20 1987-03-02
JPS63102A (en) * 1986-06-19 1988-01-05 Uzaki Atsuo Constitution of ferromagnetic field
JPS6423106A (en) * 1987-07-17 1989-01-25 Autobacs Seven Co Ltd Measuring instrument for tread rest groove of tire
JPH02208505A (en) * 1989-02-09 1990-08-20 Bridgestone Corp Measuring apparatus for base tire for retread
JPH0560510A (en) * 1991-09-04 1993-03-09 Nippon Jiki Kogyo Kk Flatness measurement and magnetic particle inspection method for metallic component
JPH0566533U (en) * 1992-02-21 1993-09-03 大阪瓦斯株式会社 Magnetostrictive stress measuring device
JPH05508706A (en) * 1990-03-19 1993-12-02 カノバ，ジネ Equipment for inspecting tire wear and the structure of automobile wheel sets
JPH085305A (en) * 1994-06-22 1996-01-12 Sekisui Chem Co Ltd Thickness measuring device
JPH0823690A (en) * 1994-07-06 1996-01-23 Nippon Steel Corp Non-contact fixing device
JPH08304009A (en) * 1995-05-10 1996-11-22 Sumitomo Rubber Ind Ltd Apparatus and method for measurement of tire-surface rubber thickness
JP2004212168A (en) * 2002-12-27 2004-07-29 National Institute Of Advanced Industrial & Technology Evaluation method of superconducting properties of superconducting film

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5573803U (en) * 1978-11-15 1980-05-21
JPS58182805A (en) * 1982-04-21 1983-10-25 Kawasaki Heavy Ind Ltd automatic demagnetizer
JPS6235210U (en) * 1985-08-20 1987-03-02
JPS63102A (en) * 1986-06-19 1988-01-05 Uzaki Atsuo Constitution of ferromagnetic field
JPS6423106A (en) * 1987-07-17 1989-01-25 Autobacs Seven Co Ltd Measuring instrument for tread rest groove of tire
JPH02208505A (en) * 1989-02-09 1990-08-20 Bridgestone Corp Measuring apparatus for base tire for retread
JPH05508706A (en) * 1990-03-19 1993-12-02 カノバ，ジネ Equipment for inspecting tire wear and the structure of automobile wheel sets
JPH0560510A (en) * 1991-09-04 1993-03-09 Nippon Jiki Kogyo Kk Flatness measurement and magnetic particle inspection method for metallic component
JPH0566533U (en) * 1992-02-21 1993-09-03 大阪瓦斯株式会社 Magnetostrictive stress measuring device
JPH085305A (en) * 1994-06-22 1996-01-12 Sekisui Chem Co Ltd Thickness measuring device
JPH0823690A (en) * 1994-07-06 1996-01-23 Nippon Steel Corp Non-contact fixing device
JPH08304009A (en) * 1995-05-10 1996-11-22 Sumitomo Rubber Ind Ltd Apparatus and method for measurement of tire-surface rubber thickness
JP2004212168A (en) * 2002-12-27 2004-07-29 National Institute Of Advanced Industrial & Technology Evaluation method of superconducting properties of superconducting film

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9011203B2 (en) 2007-03-29 2015-04-21 Michelin Recherche Et Technique S.A. Retread tire buffing with multiple response curves
JPWO2020145012A1 (en) * 2019-01-09 2021-10-21 アルプスアルパイン株式会社 Tire wear measuring device
JP7068504B2 (en) 2019-01-09 2022-05-16 アルプスアルパイン株式会社 Tire wear measuring device

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