JP2792668B2 - Inspection method of tire unevenness by tire uniformity machine - Google Patents
Inspection method of tire unevenness by tire uniformity machineInfo
- Publication number
- JP2792668B2 JP2792668B2 JP1071381A JP7138189A JP2792668B2 JP 2792668 B2 JP2792668 B2 JP 2792668B2 JP 1071381 A JP1071381 A JP 1071381A JP 7138189 A JP7138189 A JP 7138189A JP 2792668 B2 JP2792668 B2 JP 2792668B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- unevenness
- measurement
- uniformity
- inspected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Measuring Arrangements Characterized By The Use Of Fluids (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、タイヤユニフォミティマシンにおけるタイ
ヤ凹凸検査方法に関する。Description: TECHNICAL FIELD The present invention relates to a tire unevenness inspection method in a tire uniformity machine.
（従来の技術） タイヤに内圧を加えると、サイドウォール部に局部的
な凹凸が発生することは従来より既に知られており、そ
の凹凸を検出する装置として、例えば特開昭62−30361
号公報、特開昭63−191947号公報等に開示されたものが
ある。(Prior Art) It has been already known that, when an internal pressure is applied to a tire, local unevenness occurs on a sidewall portion. As a device for detecting the unevenness, for example, Japanese Patent Application Laid-Open No. Sho 62-30361
And JP-A-63-191947.
これらのタイヤ凹凸検査装置は、第２図に示す如く、
上下リム1,2間に被検査タイヤ３をチャッキングした
後、内圧をかけた状態でタイヤスピンドル４廻りに被検
査タイヤ３を回転させ、上下一対の非接触式のセンサ５
で非検査タイヤ３のサイドウォール部の凹凸を検出する
ように構成されている。また非接触式のセンサ５を使用
するため、測定時に非検査タイヤ３とセンサ５との距離
を常に一定に保つ必要があり、従って、非検査タイヤ３
の外径、幅が変化しても、常に一定距離を保ってセンサ
５をセットできるように、センサ５が幅方向、径方向に
移動可能に設けられている。即ち、各センサ５は、セン
サアーム６に取付けられており、ベルト７を介してモー
タ８により駆動されるアジャストスクリュー９の正逆回
転によって幅方向（上下方向）に調整可能である。また
センサ５、アジャストスクリュー９等はスライドベース
10取付けられ、そのスライドベース10はベルト11を介し
てモータ12により駆動されるアジャストスクリュー13に
よって径方向に調整可能である。As shown in FIG.
After chucking the tire 3 to be inspected between the upper and lower rims 1 and 2, the tire 3 to be inspected is rotated around the tire spindle 4 with the internal pressure applied, and a pair of upper and lower non-contact sensors 5
Thus, the unevenness of the sidewall portion of the non-inspection tire 3 is detected. Further, since the non-contact type sensor 5 is used, the distance between the non-inspection tire 3 and the sensor 5 must be kept constant at the time of measurement.
The sensor 5 is provided movably in the width direction and the radial direction so that the sensor 5 can always be set at a constant distance even if the outer diameter and width of the sensor 5 change. That is, each sensor 5 is attached to the sensor arm 6 and can be adjusted in the width direction (vertical direction) by forward / reverse rotation of the adjusting screw 9 driven by the motor 8 via the belt 7. The sensor 5, the adjusting screw 9, etc. are slide base
The slide base 10 is mounted, and its slide base 10 can be adjusted in the radial direction by an adjusting screw 13 driven by a motor 12 via a belt 11.
一方、タイヤユニフォミティマシンでは、第３図に示
すように、上下一対のロードセル14で支持されたロード
ホイール15の他に、RROセンサ16をスライドベース10
に、上下一対のLROセンサ17をセンサアーム16に夫々設
けておき、RFV、LFV等のユニフォミティの測定中に、被
検査タイヤ３のラジアル方向、ラテラル方向のランナウ
ト（変形量）、即ちRRO、LROをRROセンサ16、LROセンサ
17により測定するようにしている。On the other hand, in the tire uniformity machine, as shown in FIG. 3, in addition to a load wheel 15 supported by a pair of upper and lower load cells 14, an RRO sensor 16
A pair of upper and lower LRO sensors 17 are provided on the sensor arm 16, respectively, and during measurement of uniformity such as RFV and LFV, runout (deformation amount) of the tire 3 to be inspected in the radial direction and the lateral direction, that is, RRO, LRO The RRO sensor 16, LRO sensor
17 to measure.
上記タイヤ凹凸検査装置とタイヤユニフォミティマシ
ンとを比較した場合、前者はタイヤチャッキング、イン
フレーション（内圧導入）、センサ駆動機構、タイヤ搬
送装置（図示せず）等、ロードホイール15によるタイヤ
荷重、検出部を除けば、後者を全く酷似した構成であ
る。また、被検査タイヤ３のサイドウォール部における
凹凸測定部（タイヤ内部の構造上、この部分に発生し易
く、また文字等が比較的少ないため測定し易い部分）
と、LRO測定部とは近い位置にあり、しかも、凹凸測定
もLRO測定も同一センサで検出することが可能である。When comparing the above-mentioned tire unevenness inspection device with the tire uniformity machine, the former is a tire load by the road wheel 15, a tire driving device, a tire driving device, a tire conveying device (not shown), a tire loading device, and a detecting unit. Except for, the configuration is very similar to the latter. In addition, an unevenness measuring portion on the sidewall portion of the tire 3 to be inspected (a portion which is easily generated in this portion due to the structure inside the tire and which has relatively few characters and the like, and is easily measured).
And the LRO measurement section, and the unevenness measurement and the LRO measurement can be detected by the same sensor.
そこで、かかる点に着眼し、タイヤユニフォミティマ
シンをそのまま利用して、FV測定、RO測定の他に凹凸測
定を行う方法が開発されている。Therefore, a method has been developed in which attention is paid to such a point, and in addition to the FV measurement and the RO measurement, the unevenness measurement is performed using the tire uniformity machine as it is.
この従来の測定方法を第４図のフローチャートに示
す。即ち、従来は、被検査タイヤ３を上下リム1,2でチ
ャッキングした後（ステップ）まず、ユニフォミティ
測定時のテスト圧Ｐまでインフレーションを行う（ステ
ップ）。次にロードホイール15により被検査タイヤ３
に荷重を付加し（ステップ）、ウォーミングアップを
行った後（ステップ）、FV測定を行う（ステップ
）。一方、インフレーション後、センサ17を所定位置
まで前進させた後（ステップ）、RO及び凹凸測定を行
う（ステップ）。これは、FV測定と同時である。そし
て、各測定がすむと、荷重を除去すると共に、センサ17
を後退させ（ステップ）、デフレーション後（ステ
ップ）、被検査タイヤ３をアンチャッキングする（ス
テップ）。This conventional measuring method is shown in the flowchart of FIG. That is, conventionally, after the tire 3 to be inspected is chucked by the upper and lower rims 1 and 2 (step), inflation is first performed to the test pressure P at the time of uniformity measurement (step). Next, the tire 3 to be inspected by the road wheel 15
After applying a load (step), warming up (step), and performing FV measurement (step). On the other hand, after inflation, after the sensor 17 is advanced to a predetermined position (step), RO and unevenness are measured (step). This is simultaneous with the FV measurement. After each measurement, the load is removed and the sensor 17
Is retracted (step), and after deflation (step), the tire 3 to be inspected is unchucked (step).
（発明が解決しようとする課題） このようにタイヤユニフォミティマシンを利用して凹
凸測定を行えば、装置の統合、兼用による余剰設備を削
減できる利点がある。(Problems to be Solved by the Invention) If the unevenness is measured by using the tire uniformity machine as described above, there is an advantage that the number of redundant facilities can be reduced due to the integration and dual use of the apparatus.
しかし、従来の方法は、ユニフォミティの測定と同時
に凹凸測定を行っているので、確実に凹凸を検出し得な
い欠点があった。即ち、サイドウォール部の凹凸は、内
圧を高くする程顕著に現れ、検出も容易なるが、従来は
ユニフォミティの測定と同時に行っているので、ユニフ
ォミティ測定時のタイヤ内圧がJASO C607規格によりタ
イヤの種類に応じて定められているため、その内圧で凹
凸測定を行わなければならず、従って、十分な測定結果
が得られないと言う問題があった。However, in the conventional method, since the unevenness is measured simultaneously with the measurement of the uniformity, there is a drawback that the unevenness cannot be reliably detected. That is, the unevenness of the side wall portion becomes more noticeable as the internal pressure is increased, and the detection becomes easy.However, since the measurement of the uniformity is conventionally performed simultaneously with the measurement of the uniformity, the tire internal pressure at the time of the uniformity measurement is determined according to the JASO C607 standard. Therefore, there is a problem that unevenness measurement must be performed at the internal pressure, and therefore, a sufficient measurement result cannot be obtained.
本発明は、このような従来の欠点を解決し、サイドウ
ォール部の凹凸を確実に検出できるようにすることを目
的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve such conventional disadvantages and to reliably detect unevenness of a sidewall portion.
（課題を解決するための手段） 本発明は、そのための手段として、上下リム1,2間に
チャッキングした被検査タイヤ３への内圧導入時に、ユ
ニフォミティ測定圧より高い圧を入れ、この状態にて被
検査タイヤ３のサイドウォール部の凹凸を測定し、然る
後、被検査タイヤ３の内圧をユニフォミティ測定圧に調
圧してユニフォミティを測定するものである。(Means for Solving the Problems) According to the present invention, a pressure higher than the uniformity measurement pressure is applied when internal pressure is introduced into the tire 3 to be inspected, which is chucked between the upper and lower rims 1 and 2. Then, the unevenness of the sidewall portion of the tire 3 to be inspected is measured, and thereafter, the internal pressure of the tire 3 to be inspected is adjusted to the uniformity measurement pressure to measure the uniformity.
（実施例） 以下、図示の実施例について本発明を詳述する。(Examples) Hereinafter, the present invention will be described in detail with reference to the illustrated examples.
なお、タイヤユニフォミティマシンは、第３図に示す
ものをそのまま用いるものとする。The tire uniformity machine shown in FIG. 3 is used as it is.
第１図は本発明に係る検査方法を示すフローチャート
であり、これを参照しながら説明する。FIG. 1 is a flowchart showing an inspection method according to the present invention, which will be described with reference to FIG.
被検査タイヤ３のチャッキングが終わると（ステップ
）先ず被検査タイヤ３内に内圧を導入するインフレー
ションを行う（ステップ）。このインフレーション
は、被検査タイヤ３のサイドウォール部の凹凸の発生を
顕著にするために、タイヤユニフォミティ測定圧Ｐより
も高い圧力に設定する。そして、高圧のインフレーショ
ンが終わると、センサ17を前進させた後（ステップ
）、このセンサ17により被検査タイヤ３の凹凸測定を
行う（ステップ）。従って、高圧インフレーションに
より凹凸が顕著に発生しているので、それを確実に検出
し測定することができる。凹凸測定が終わると、被検査
タイヤ３の内圧をユニフォミティ測定時のテスト圧Ｐま
で調圧し（ステップ）を、ロードホイール15により被
検査タイヤ３に荷重を付加し（ステップ）、所定のウ
ォーミングアップを行った後（ステップ）、本来のF
V、RO測定に入る（ステップ）。そして、その後、荷
重を除去し（ステップ）、センサ17を後退させ、（ス
テップ）、デフレーションを行い（ステップ）、被
検査タイヤ３をアンチャッキングする（ステップ）。When chucking of the tire 3 to be inspected is completed (step), inflation for introducing an internal pressure into the tire 3 to be inspected is first performed (step). This inflation is set to a pressure higher than the tire uniformity measurement pressure P in order to remarkably generate the unevenness of the sidewall portion of the tire 3 to be inspected. When the high-pressure inflation ends, the sensor 17 is advanced (step), and then the unevenness of the tire 3 is measured by the sensor 17 (step). Therefore, since the unevenness is significantly generated due to the high pressure inflation, the unevenness can be reliably detected and measured. When the unevenness measurement is completed, the internal pressure of the inspected tire 3 is adjusted to the test pressure P at the time of uniformity measurement (step), and a load is applied to the inspected tire 3 by the load wheel 15 (step), and a predetermined warming-up is performed. After (step), the original F
Enter V, RO measurement (step). Then, thereafter, the load is removed (step), the sensor 17 is retracted (step), deflation is performed (step), and the tire 3 to be inspected is unchucked (step).
なお、凹凸測定時の内圧は、凹凸が顕著に発生する圧
力であれば良い。The internal pressure at the time of measuring the unevenness may be a pressure at which the unevenness is significantly generated.
また、高圧測定の結果は、ユニフォミティ測定圧にお
ける結果よりも大きく出るので、演算装置にて補正し修
正しても良い。In addition, since the result of the high pressure measurement is larger than the result of the uniformity measurement pressure, the result may be corrected and corrected by the arithmetic unit.
（発明の効果） 本発明によれば、ユニフォミティ測定圧よりも高い高
圧下でサイドウォール部の凹凸を測定した後、ユニフォ
ミティマシン測定圧まで下げてユニフォミティマシンを
測定するので、従来に比較して凹凸の発生が顕著にな
り、確実に測定できる。(Effect of the Invention) According to the present invention, after measuring the unevenness of the sidewall portion under a high pressure higher than the uniformity measurement pressure, the uniformity machine is measured by lowering to the uniformity machine measurement pressure. Is remarkable, and it can be measured reliably.
第１図は本発明の一実施例を示すフローチャート、第２
図は従来のタイヤ凹凸検査装置の構成図、第３図は同タ
イヤユニフォミティマシンの構成図、第４図はその検査
方法を示すフローチャートである。 1,2……上下リム、３……タイヤ。FIG. 1 is a flowchart showing one embodiment of the present invention, and FIG.
FIG. 1 is a configuration diagram of a conventional tire unevenness inspection apparatus, FIG. 3 is a configuration diagram of the tire uniformity machine, and FIG. 4 is a flowchart showing an inspection method thereof. 1,2 ... top and bottom rims, 3 ... tires.
Claims (1)
た被検査タイヤ（３）への内圧導入時に、ユニフォミテ
ィ測定圧より高い圧を入れ、この状態にて被検査タイヤ
（３）のサイドウォール部の凹凸を測定し、然る後、被
検査タイヤ（３）の内圧をユニフォミティ測定圧に調圧
してユニフォミティを測定することを特徴とするタイヤ
ユニフォミティマシンによるタイヤ凹凸検査方法。A pressure higher than a uniformity measurement pressure is applied when an internal pressure is introduced into a tire to be inspected (3) chucked between upper and lower rims (1) and (2). A tire unevenness inspection method using a tire uniformity machine, comprising: measuring unevenness of a sidewall portion, and thereafter adjusting the internal pressure of a tire to be inspected (3) to a uniformity measurement pressure to measure uniformity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071381A JP2792668B2 (en) | 1989-03-22 | 1989-03-22 | Inspection method of tire unevenness by tire uniformity machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071381A JP2792668B2 (en) | 1989-03-22 | 1989-03-22 | Inspection method of tire unevenness by tire uniformity machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02248809A JPH02248809A (en) | 1990-10-04 |
| JP2792668B2 true JP2792668B2 (en) | 1998-09-03 |
Family
ID=13458871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1071381A Expired - Lifetime JP2792668B2 (en) | 1989-03-22 | 1989-03-22 | Inspection method of tire unevenness by tire uniformity machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2792668B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10257907B4 (en) | 2002-12-11 | 2011-09-29 | Snap-On Equipment Gmbh | Method and apparatus for checking the uniformity of a pneumatic tire |
| CN112129248A (en) * | 2020-09-01 | 2020-12-25 | 钱瑜 | Surface flatness detection device for building inner wall |
-
1989
- 1989-03-22 JP JP1071381A patent/JP2792668B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02248809A (en) | 1990-10-04 |
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