JP2017067678A - Fv measuring apparatus and fv measuring method - Google Patents

Fv measuring apparatus and fv measuring method Download PDF

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JP2017067678A
JP2017067678A JP2015195837A JP2015195837A JP2017067678A JP 2017067678 A JP2017067678 A JP 2017067678A JP 2015195837 A JP2015195837 A JP 2015195837A JP 2015195837 A JP2015195837 A JP 2015195837A JP 2017067678 A JP2017067678 A JP 2017067678A
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宏樹 表
Hiroki Omote
宏樹 表
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Sumitomo Rubber Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an FV measuring apparatus capable of preventing inaccurate measurement results from being obtained as a result of increase in the amount of air leakage, and an FV measuring method.SOLUTION: An FV measuring apparatus fills air into a tire that is supported by a pair of vertical rims to measure FV of the tire in a state where the tire is inflated. With air supply piping for supplying air into the tire, a flow meter for measuring the flow rate of air supplied into the tire is provided. In addition, determination means is provided for determining that air leakage occurs from the tire when measurement results of the flow rate of air by the flow meter exceeds a prescribed threshold value.SELECTED DRAWING: Figure 1

Description

本発明は、空気入りタイヤのＦＶの測定を行うＦＶ測定装置およびＦＶ測定方法に関する。   The present invention relates to an FV measuring apparatus and an FV measuring method for measuring FV of a pneumatic tire.

空気入りタイヤの製造工程においては、製品タイヤの品質管理のために、タイヤの剛性と寸法の不均一性に起因する荷重の変動を示すフォースバリエーション（ＦＶ：Ｆｏｒｃｅ Ｖａｒｉａｔｉｏｎ）の測定が行なわれている（特許文献１）。   In the manufacturing process of pneumatic tires, force variation (FV: Force Variation) measurement is performed to indicate load fluctuations caused by tire rigidity and dimensional non-uniformity for quality control of product tires. (Patent Document 1).

図３は従来のＦＶ測定装置を模式的に示す図である。図３に示すように、このＦＶ測定装置５０では、一対のリム５２、５４にタイヤＴを保持させ、タイヤＴ内にエアを充填して所定の内圧に膨張させるインフレートを行った後、インフレート状態のタイヤＴをロードホイール５８で押圧した状態で、スピンドル５６の軸Ｌを中心にして回転させることによりＦＶを測定する。このとき、タイヤ内圧（インフレート圧）の増減により、ロードホイール５８によるタイヤＴの押圧状態が変化するため、ＦＶ測定に際しては、タイヤ内圧を一定に維持して測定を行う必要がある。   FIG. 3 is a diagram schematically showing a conventional FV measuring apparatus. As shown in FIG. 3, in the FV measuring device 50, after the tire T is held by the pair of rims 52, 54 and the tire T is filled with air and inflated to a predetermined internal pressure, the inflation is performed. The FV is measured by rotating the tire T in the freight state with the road wheel 58 around the axis L of the spindle 56. At this time, since the pressing state of the tire T by the road wheel 58 changes due to increase / decrease of the tire internal pressure (inflation pressure), it is necessary to keep the tire internal pressure constant during the FV measurement.

特開２０１０−１８５７０９号公報JP 2010-185709 A

しかしながら、ロードホイール５８に接して回転するタイヤＴからエアが漏れ出てタイヤ内圧が変化する場合がある。そこで、従来より、このエア漏れに対して、タイヤＴ内にエアを供給し続けることによりタイヤ内圧を維持しているが、エア漏れの量が多くなるとタイヤ内圧を維持できなくなってＦＶの測定結果に影響を及ぼし、不正確な測定結果が得られる恐れがある。   However, there are cases where air leaks from the tire T rotating in contact with the road wheel 58 and the tire internal pressure changes. Therefore, conventionally, the tire internal pressure is maintained by continuously supplying air into the tire T against the air leakage. However, if the amount of air leakage increases, the tire internal pressure cannot be maintained, and the FV measurement result. May cause inaccurate measurement results.

そこで、本発明は、製品タイヤのＦＶ測定において、エア漏れの量が多くなることによって不正確な測定結果が得られることを防止することができるＦＶ測定装置およびＦＶ測定方法を提供することを課題とする。   Accordingly, the present invention provides an FV measuring apparatus and an FV measuring method capable of preventing an inaccurate measurement result from being obtained due to an increase in the amount of air leakage in FV measurement of a product tire. And

請求項１に記載の発明は、
上下一対のリムに保持されたタイヤ内にエアを充填して、前記タイヤをインフレートさせた状態で前記タイヤのＦＶを測定するＦＶ測定装置であって、
前記タイヤ内に前記エアを供給するエア供給配管に、前記タイヤ内に供給されるエアの流量を測定する流量計が設けられており、
さらに、前記流量計による前記エアの流量の測定結果が所定の閾値を超えた際に、前記タイヤからエア漏れが発生していると判定する判定手段が設けられていることを特徴とするＦＶ測定装置である。 The invention described in claim 1
An FV measuring device that fills air into a tire held by a pair of upper and lower rims and measures the FV of the tire in a state where the tire is inflated,
A flow meter for measuring a flow rate of air supplied into the tire is provided in an air supply pipe for supplying the air into the tire,
Further, FV measurement is provided, wherein determination means for determining that an air leak has occurred from the tire when a measurement result of the air flow rate by the flow meter exceeds a predetermined threshold value is provided. Device.

請求項２に記載の発明は、
さらに、前記判定手段によって前記エア漏れが発生していると判定された際に、前記タイヤのＦＶ測定を停止させる停止手段を備えていることを特徴とする請求項１に記載のＦＶ測定装置である。 The invention described in claim 2
2. The FV measuring apparatus according to claim 1, further comprising a stopping unit that stops the FV measurement of the tire when the determining unit determines that the air leakage has occurred. is there.

請求項３に記載の発明は、
請求項１または請求項２に記載のＦＶ測定装置を用いて、タイヤのＦＶ測定を行うＦＶ測定方法であって、
前記流量計を用いて、ＦＶ測定中に前記タイヤへ供給されるエアの流量を測定し、
前記流量計による前記エアの流量の測定結果が所定の閾値を超えた際に、前記タイヤからエア漏れが発生していると判定することを特徴とするＦＶ測定方法である。 The invention according to claim 3
An FV measurement method for performing FV measurement of a tire using the FV measurement device according to claim 1 or 2,
Using the flow meter, measure the flow rate of air supplied to the tire during FV measurement,
When the measurement result of the air flow rate by the flow meter exceeds a predetermined threshold, it is determined that an air leak has occurred from the tire.

請求項４に記載の発明は、
前記タイヤのＦＶ測定中に前記エア漏れが発生していると判定された際に、前記タイヤのＦＶ測定を停止させることを特徴とする請求項３に記載のＦＶ測定方法である。 The invention according to claim 4
The FV measurement method according to claim 3, wherein the FV measurement of the tire is stopped when it is determined that the air leakage has occurred during the FV measurement of the tire.

本発明によれば、エア漏れの量が多くなることによって不正確な測定結果が得られることを防止することができるＦＶ測定装置およびＦＶ測定方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the FV measuring apparatus and FV measuring method which can prevent that an inaccurate measurement result is obtained by the amount of air leaks increasing can be provided.

本発明の一実施の形態に係るＦＶ測定装置を模式的に示す図である。It is a figure which shows typically the FV measuring apparatus which concerns on one embodiment of this invention. 本発明の一実施の形態に係るＦＶ測定装置を模式的に示す図である。It is a figure which shows typically the FV measuring apparatus which concerns on one embodiment of this invention. 従来のＦＶ測定装置を模式的に示す図である。It is a figure which shows the conventional FV measuring apparatus typically.

以下、図面を参照しながら本実施の形態について説明する。   The present embodiment will be described below with reference to the drawings.

１．本実施の形態に係るＦＶ測定装置の構成
図１および図２は本実施の形態に係るＦＶ測定装置を模式的に示す図である。具体的には、図１はリム１２、１４とタイヤＴとの間からエア漏れＦが生じている状態を示す図であり、図２はタイヤＴに空いた穴からエア漏れＦが生じている状態を示す図である。 1. Configuration of FV Measuring Device According to this Embodiment FIGS. 1 and 2 are diagrams schematically showing an FV measuring device according to this embodiment. Specifically, FIG. 1 is a view showing a state in which an air leak F occurs between the rims 12 and 14 and the tire T, and FIG. 2 shows an air leak F generated from a hole formed in the tire T. It is a figure which shows a state.

図１および図２に示すように、本実施の形態に係るＦＶ測定装置１０は、従来と同様に、測定対象のタイヤＴを保持する上下一対のリム１２、１４と、リム１２、１４に保持されたタイヤＴを回転させるスピンドル１６と、ＦＶ測定に際してインフレート状態のタイヤＴを押圧するロードホイール（図示省略）とを備えている。   As shown in FIGS. 1 and 2, the FV measurement device 10 according to the present embodiment is held by a pair of upper and lower rims 12 and 14 that hold a tire T to be measured, and the rims 12 and 14, as in the past. A spindle 16 for rotating the tire T, and a road wheel (not shown) for pressing the inflated tire T during FV measurement.

上側のリム１２には、タイヤＴ内にエアを供給するエア供給配管２０が接続されており、エア供給配管２０からタイヤＴ内にエアを供給することによりタイヤＴがインフレートされる。ここまでの構成は従来のＦＶ測定装置と同様である。   An air supply pipe 20 that supplies air into the tire T is connected to the upper rim 12, and the tire T is inflated by supplying air from the air supply pipe 20 into the tire T. The configuration so far is the same as that of the conventional FV measuring apparatus.

しかし、本実施の形態においては、上記したエア供給配管２０に、タイヤＴ内に供給されるエアの流量を測定する流量計２２が設けられており、さらに流量計２２が測定したエアの流量の測定結果を所定の閾値と比較し、その結果に基づいてタイヤＴからエア漏れＦが発生しているか否かを判定する判定手段３０が設けられている点において従来と異なる。   However, in the present embodiment, the above-described air supply pipe 20 is provided with a flow meter 22 for measuring the flow rate of the air supplied into the tire T, and further the air flow rate measured by the flow meter 22 is measured. The measurement result is compared with a predetermined threshold value, and is different from the conventional one in that determination means 30 is provided for determining whether or not an air leak F has occurred from the tire T based on the result.

一般に、タイヤＴからのエア漏れＦは、機械要因である場合もあれば、タイヤ要因である場合もあり、どの位置で発生しているか不明確であるため、エア漏れが発生している箇所近傍で直接エア漏れの発生を検出することは難しい。   In general, the air leak F from the tire T may be a mechanical factor or a tire factor, and since it is unclear at which position it is occurring, the vicinity of the location where the air leak has occurred It is difficult to detect the occurrence of air leak directly.

このため、本実施の形態では、エア供給側のエア供給配管２０に流量計２２が設けられており、エア漏れに対してタイヤ内圧を維持するために供給したエアの流量を測定している。なお、流量計２２には、一般的なエア流量を測定する機器を用いることができ、特に限定されない。   For this reason, in this Embodiment, the flowmeter 22 is provided in the air supply piping 20 by the side of an air supply, and the flow volume of the supplied air is measured in order to maintain a tire internal pressure with respect to an air leak. In addition, the flowmeter 22 can use the apparatus which measures a general air flow rate, and is not specifically limited.

そして、判定手段３０は、流量計２２により測定されたエアの流量と、閾値を比較して、測定値が閾値を超えた場合に正常なＦＶ測定ができないと判定し、アラームを鳴らして作業者にＦＶ測定の停止を促すように構成されている。   The determination unit 30 compares the air flow rate measured by the flow meter 22 with a threshold value, determines that normal FV measurement cannot be performed when the measured value exceeds the threshold value, and sounds an alarm to give the operator an alarm. Is configured to prompt the stop of the FV measurement.

２．本実施の形態に係るＦＶ測定方法
次に、上記したＦＶ測定装置１０を用いたＦＶ測定方法を説明するが、基本的な測定方法は従来のＦＶ測定方法と同様である。 2. FV Measurement Method According to the Present Embodiment Next, an FV measurement method using the above-described FV measurement device 10 will be described. The basic measurement method is the same as the conventional FV measurement method.

先ず、ＦＶ測定装置１０の一対のリム１２、１４にタイヤＴを装着させた後、エア供給配管２０からタイヤＴ内にエアを充填してタイヤＴをインフレート状態にする。そして、ロードホイール（図示せず）をタイヤＴに接触させ、荷重設定値に達するまでロードホイールをタイヤＴに押し付ける。   First, after attaching the tire T to the pair of rims 12 and 14 of the FV measuring device 10, the tire T is inflated by filling the tire T with air from the air supply pipe 20. Then, the road wheel (not shown) is brought into contact with the tire T, and the road wheel is pressed against the tire T until the load set value is reached.

この状態で、スピンドル１６の軸Ｌを中心にしてタイヤＴを回転させてＦＶの測定を行う。この際、タイヤＴの内圧が設定圧力に維持されるようにタイヤＴ内にエアを供給しながらＦＶ測定を行う。ここまでの工程は従来と同様である。   In this state, the tire T is rotated about the axis L of the spindle 16 to measure FV. At this time, FV measurement is performed while supplying air into the tire T so that the internal pressure of the tire T is maintained at the set pressure. The steps so far are the same as in the prior art.

しかし、本実施の形態においては、上記したＦＶ測定中に供給されたエアの流量を流量計２２で測定し、判定手段３０において、流量計２２が測定したエアの流量と閾値とを比較してエアの流量が正常か否かを判定しており、この点が従来では行なわれていなかったことである。   However, in the present embodiment, the flow rate of air supplied during the FV measurement described above is measured by the flow meter 22, and the determination unit 30 compares the flow rate of air measured by the flow meter 22 with a threshold value. It is determined whether or not the air flow rate is normal, and this is not done conventionally.

ＦＶ測定装置においてタイヤＴからのエア漏れの量が多いと、タイヤＴの内圧を維持するためにエアの供給量が多くなるため、流量計２２による測定値が通常よりも多くなる。そして、この測定値が閾値を超えた場合に、判定手段が異常と判定する。そして、異常が生じている旨のアラームを鳴らして作業者にＦＶ測定の停止を促す。   If the amount of air leakage from the tire T is large in the FV measuring device, the amount of air supplied increases in order to maintain the internal pressure of the tire T, and therefore the measured value by the flow meter 22 becomes larger than usual. And when this measured value exceeds a threshold value, a determination means determines with it being abnormal. Then, an alarm indicating that an abnormality has occurred is sounded to prompt the operator to stop the FV measurement.

このように、本実施の形態によれば、ＦＶ測定中にタイヤＴに供給されるエアの流量を測定することによりエア漏れＦの量を検出し、エア漏れＦが多い場合に適宜ＦＶ測定を停止させることができるため、多量のエア漏れによるタイヤ内圧の変動で不正確な測定結果が得られることを防止することができる。   As described above, according to the present embodiment, the amount of air leakage F is detected by measuring the flow rate of air supplied to the tire T during FV measurement. Since it can be stopped, it is possible to prevent an inaccurate measurement result from being obtained due to fluctuations in tire internal pressure due to a large amount of air leakage.

また、本実施の形態では、タイヤへ供給されるエアの流量を測定しており、その流量の多少により異常内容を推測することも可能である。例えば、タイヤに穴が空いている場合や規格外れタイヤが装着されている場合には、特にエア供給量が多くなり易い。   Further, in the present embodiment, the flow rate of air supplied to the tire is measured, and it is possible to estimate the abnormal content from the amount of the flow rate. For example, when the tire has a hole or a nonstandard tire is mounted, the air supply amount tends to increase.

なお、判定手段３０に設定される閾値としては、過去に測定された流量を反映して変動する変動閾値を採用することが好ましい。タイヤＴはサイズによってインフレートが容易なものもあれば困難なものもあり、さらに同じサイズのタイヤの場合でも個体差がある。このため、上記した変動閾値を採用して、同一サイズの過去の流量を反映した閾値を設定することにより、適切な閾値の下でタイヤからのエア漏れを検知することができる。   Note that, as the threshold value set in the determination unit 30, it is preferable to employ a fluctuation threshold value that varies reflecting the flow rate measured in the past. Depending on the size, the tire T may be easy to inflate or may be difficult, and even tires of the same size have individual differences. For this reason, by adopting the above-described variation threshold and setting a threshold reflecting the past flow rate of the same size, it is possible to detect air leakage from the tire under an appropriate threshold.

また、上記した実施の形態においては、判定手段３０が多量のエア漏れが生じていると判定した場合に、アラームを鳴らして作業者にＦＶ測定の停止を促すように構成されていたが、これに限定されず、例えば、自動的にＦＶ測定を停止させるように構成されていてもよい。   In the above-described embodiment, when the determination unit 30 determines that a large amount of air leakage has occurred, the alarm is sounded to prompt the operator to stop the FV measurement. For example, the FV measurement may be automatically stopped.

以上、本発明を実施の形態に基づき説明したが、本発明は上記の実施の形態に限定されるものではない。本発明と同一および均等の範囲内において、上記の実施の形態に対して種々の変更を加えることが可能である。   As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to said embodiment. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

１０、５０ ＦＶ測定装置
１２、１４、５２、５４ リム
１６、５６ スピンドル
２０ エア供給配管
２２ 流量計
３０ 判定手段
５８ ロードホイール
Ｆ エア漏れ
Ｔ タイヤ
Ｌ スピンドルの軸 10, 50 FV measuring device 12, 14, 52, 54 Rim 16, 56 Spindle 20 Air supply pipe 22 Flow meter 30 Judging means 58 Road wheel F Air leak T Tire L Spindle shaft

Claims (4)

上下一対のリムに保持されたタイヤ内にエアを充填して、前記タイヤをインフレートさせた状態で前記タイヤのＦＶを測定するＦＶ測定装置であって、
前記タイヤ内に前記エアを供給するエア供給配管に、前記タイヤ内に供給されるエアの流量を測定する流量計が設けられており、
さらに、前記流量計による前記エアの流量の測定結果が所定の閾値を超えた際に、前記タイヤからエア漏れが発生していると判定する判定手段が設けられていることを特徴とするＦＶ測定装置。 An FV measuring device that fills air into a tire held by a pair of upper and lower rims and measures the FV of the tire in a state where the tire is inflated,
A flow meter for measuring a flow rate of air supplied into the tire is provided in an air supply pipe for supplying the air into the tire,
Further, FV measurement is provided, wherein determination means for determining that an air leak has occurred from the tire when a measurement result of the air flow rate by the flow meter exceeds a predetermined threshold value is provided. apparatus. さらに、前記判定手段によって前記エア漏れが発生していると判定された際に、前記タイヤのＦＶ測定を停止させる停止手段を備えていることを特徴とする請求項１に記載のＦＶ測定装置。   2. The FV measurement device according to claim 1, further comprising a stop unit that stops the FV measurement of the tire when the determination unit determines that the air leakage has occurred. 請求項１または請求項２に記載のＦＶ測定装置を用いて、タイヤのＦＶ測定を行うＦＶ測定方法であって、
前記流量計を用いて、ＦＶ測定中に前記タイヤへ供給されるエアの流量を測定し、
前記流量計による前記エアの流量の測定結果が所定の閾値を超えた際に、前記タイヤからエア漏れが発生していると判定することを特徴とするＦＶ測定方法。 An FV measurement method for performing FV measurement of a tire using the FV measurement device according to claim 1 or 2,
Using the flow meter, measure the flow rate of air supplied to the tire during FV measurement,
An FV measurement method, wherein when the measurement result of the air flow rate by the flow meter exceeds a predetermined threshold, it is determined that air leakage has occurred from the tire. 前記タイヤのＦＶ測定中に前記エア漏れが発生していると判定された際に、前記タイヤのＦＶ測定を停止させることを特徴とする請求項３に記載のＦＶ測定方法。   The FV measurement method according to claim 3, wherein the FV measurement of the tire is stopped when it is determined that the air leakage has occurred during the FV measurement of the tire.
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Publication number Priority date Publication date Assignee Title
JP2018119806A (en) * 2017-01-23 2018-08-02 住友ゴム工業株式会社 Inflation facility and gas leak detection method

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