JP2815929B2 - Core assembly for pneumatic tires - Google Patents
Core assembly for pneumatic tiresInfo
- Publication number
- JP2815929B2 JP2815929B2 JP1261079A JP26107989A JP2815929B2 JP 2815929 B2 JP2815929 B2 JP 2815929B2 JP 1261079 A JP1261079 A JP 1261079A JP 26107989 A JP26107989 A JP 26107989A JP 2815929 B2 JP2815929 B2 JP 2815929B2
- Authority
- JP
- Japan
- Prior art keywords
- peripheral surface
- core assembly
- pneumatic tire
- rim
- inner peripheral
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/045—Rotatable supports relative to the rim
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/10—Internal lubrication
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、パンクなどにより、空気入りタイヤの内圧
が低下した場合に、一定距離の安全走行を可能にする空
気入りタイヤ用中子組立体に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a core assembly for a pneumatic tire that enables safe driving for a certain distance when the internal pressure of the pneumatic tire is reduced due to a puncture or the like. About.
従来、中子組立体をリムに取り付けた例は過去多数あ
る。しかし、それらは殆どが中子組立体をリムにボルト
等で固定しているため、ランフラツト（低内圧走行）
時、タイヤと中子組立体との間の周長差のためにタイヤ
と中子組立体との間に擦れを生じ、タイヤが破損を生じ
やすいという欠点がある。Conventionally, there have been many examples of attaching a core assembly to a rim in the past. However, since most of them fix the core assembly to the rim with bolts, etc., the lanyard (low internal pressure running)
At this time, there is a disadvantage that the tire and the core assembly are rubbed due to a circumferential length difference between the tire and the core assembly, and the tire is easily damaged.
これを改善する空気入りタイヤ用中子組立体として、
特公昭55−3163号公報が開示されている。この空気入り
タイヤ用中子組立体は、少なくとも一部が弾性材料によ
り構成された２個以上の弧状体の各端部を重ね合わせて
連結することにより環状に組み立てられるとともに、空
気入りタイヤを装着したリムのウエル部外周面に嵌合さ
れたものである。そして、この中子組立体は、空気入り
タイヤが内圧低下により潰れた場合に、外周面が空気入
りタイヤのクラウン部の内周面と接触するようになって
おり、空気入りタイヤから与えられた力によりリムのウ
エル部外周面上を滑って回転し、空気入りタイヤのクラ
ウン部との間の擦れを防止するようにしている。As a core assembly for pneumatic tires to improve this,
Japanese Patent Publication No. 55-3163 is disclosed. This pneumatic tire core assembly is assembled in an annular shape by overlapping and connecting the ends of two or more arc-shaped bodies at least partially made of an elastic material, and is fitted with a pneumatic tire. Is fitted to the outer peripheral surface of the well portion of the rim. When the pneumatic tire is crushed due to a decrease in internal pressure, the outer peripheral surface of the core assembly comes into contact with the inner peripheral surface of the crown portion of the pneumatic tire, and the core assembly is provided from the pneumatic tire. The rim slides on the outer peripheral surface of the well portion of the rim and rotates to prevent friction between the rim and the crown portion of the pneumatic tire.
しかしながら、この空気入りタイヤ用中子組立体にお
いては、中子組立体を装着したタイヤの使用条件のうち
で、実用上有りえる範囲の高い荷重域または高い速度域
において、ランフラツト（低内圧走行）時、中子組立体
のリムウエル部との接触面が摩擦によって摩耗を起して
走行不能になると言う欠点がある。However, in this core assembly for a pneumatic tire, in the use condition of the tire to which the core assembly is mounted, in a high load range or a high speed range that is practically possible, a ranflat (low internal pressure running) is performed. At this time, there is a disadvantage that the contact surface of the core assembly with the rim well portion is worn due to friction and cannot run.
本発明は上記事実を考慮し、中子組立体の内周面とリ
ムウエル部との接触面の摩擦熱を低減でき、比較的長距
離の走行を可能にできる空気入りタイヤ用中子組立体を
得ることが目的である。In view of the above facts, the present invention provides a pneumatic tire core assembly capable of reducing frictional heat at the contact surface between the inner peripheral surface of the core assembly and the rim well portion and enabling relatively long distance running. The purpose is to get.
上記目的を達成するために本発明は、少なくとも一部
が弾性材料により構成された２個以上の弧状体の各端部
を重ね合わせて連結することにより環状に組立られると
ともに空気入りタイヤを装着したリムのウエル部外周面
に嵌合され空気入りタイヤが内圧低下により潰れた場合
に外周面が空気入りタイヤのクラウン部内周面と接触し
内周面がウエル部外周面上を滑って回転する空気入りタ
イヤ用中子組立体であって、内周面に形成された溝と、
内周面とリムのウエル部外周面との間に充填された潤滑
剤と、有することを特徴としている。In order to achieve the above object, the present invention provides an annular assembly by overlapping and connecting two or more ends of at least a part of an arc-shaped body made of an elastic material and mounting a pneumatic tire. When the pneumatic tire is crushed due to a decrease in internal pressure when fitted on the outer peripheral surface of the well portion of the rim, the outer peripheral surface comes into contact with the inner peripheral surface of the crown portion of the pneumatic tire, and the inner peripheral surface slides on the outer peripheral surface of the well portion and rotates. A core assembly for a tire including a groove formed on an inner peripheral surface,
A lubricant filled between the inner peripheral surface and the outer peripheral surface of the well portion of the rim.
本発明においては、中子組立体は通常走行時は内周面
とリムのウエル部の外周面との摩擦によってリムと一体
となって回転している。パンク等により空気入りタイヤ
の内圧が低下すると、空気入りタイヤは接地側において
潰れ、クラウン部内周面が中子組立体の外周面に接触す
るようになる。この時、中子組立体は空気入りタイヤの
クラウン部を内側から支持してその潰れを防止し、内圧
低下状態における空気入りタイヤの走行（ランフラツ
ト）を可能にするとともに、空気入りタイヤから与えら
れた力によりリムのウエル部外周面上を滑って回転し、
空気入りタイヤのクラウン部内周面と中子組立体の外周
面との間の擦れを防止する。In the present invention, during normal running, the core assembly rotates integrally with the rim due to friction between the inner peripheral surface and the outer peripheral surface of the well portion of the rim. When the internal pressure of the pneumatic tire decreases due to puncture or the like, the pneumatic tire collapses on the ground contact side, and the inner peripheral surface of the crown portion comes into contact with the outer peripheral surface of the core assembly. At this time, the core assembly supports the crown portion of the pneumatic tire from the inside to prevent the crown portion from collapsing, enables the pneumatic tire to run (run flat) in a state where the internal pressure is low, and is provided by the pneumatic tire. The rim slides on the outer peripheral surface of the rim well and rotates.
Rubbing between the inner peripheral surface of the crown portion of the pneumatic tire and the outer peripheral surface of the core assembly is prevented.
また、この時中子組立体のリムウエル部との接触面に
は多大な摩擦が発生する。このため、本発明の中子組立
体は内周面に溝を設け、かつ潤滑剤を中子組立体の内周
面とリムのリムウエル部の外周面との間に充填し、中子
組立体とリムウエル部との摩擦抵抗を少なくすることに
よって、内圧低下後に高荷重下で高速走行しても、中子
組立体のリムウエル部との接触面が摩擦によって破損す
ることなく、比較的長距離の走行ができる。At this time, a large amount of friction occurs on the contact surface of the core assembly with the rim well. For this reason, the core assembly of the present invention has a groove in the inner peripheral surface, and a lubricant is filled between the inner peripheral surface of the core assembly and the outer peripheral surface of the rim well portion of the rim. The frictional resistance between the core assembly and the rim well is reduced so that the contact surface with the rim well of the core assembly is not damaged by friction even when running at high load under a high load after the internal pressure is reduced. I can run.
また、溝は周方向に連続であり、幅方向に閉じていて
ランフラツト時に潤滑剤がタイヤ内部にこぼれるのを防
ぐことが好ましい。また潤滑剤は混和ちょう度が295以
下のグーリスが好ましい。また、潤滑剤の効果の持続性
を考えるとスピンドル油やシリコンオイルは好ましくな
い。Further, the groove is preferably continuous in the circumferential direction and closed in the width direction to prevent the lubricant from spilling into the tire during runflat. Further, the lubricant is preferably a goose having a penetration consistency of 295 or less. Considering the durability of the effect of the lubricant, spindle oil and silicone oil are not preferred.
また、最近の空気入りタイヤでは、パンクの確率は低
く、そのため中子組立体が使用される頻度も余り高くな
いと言える。そこで、通常内圧での走行時に潤滑剤がタ
イヤ内部にこぼれたり劣化したりするのを防止するため
に、シート状もしくは袋状のもので潤滑剤を密閉するの
が好ましい。Also, with recent pneumatic tires, the probability of puncture is low, and therefore, it can be said that the core assembly is not used very frequently. Therefore, in order to prevent the lubricant from spilling or deteriorating inside the tire when traveling under normal internal pressure, it is preferable to seal the lubricant with a sheet or bag.
本発明の第１実施例を第１図〜第４図に従って説明す
る。A first embodiment of the present invention will be described with reference to FIGS.
本実施例の中子組立体は、周知の如く少なくとも一部
が弾性材料により構成された２個以上の弧状体の部材に
より構成されており、各部材の各端部をそれぞれ重ね合
わせて連結することにより環状に組立られている。As is well known, the core assembly of this embodiment is formed of two or more arc-shaped members at least partially formed of an elastic material, and the respective ends of the members are overlapped and connected. Thus, it is assembled in an annular shape.
第１図に示される如く、中子組立体10の周方向から見
た断面形状はＩ字状とされており、内周面10Aは、空気
入りタイヤ12のビード部12Aが固着されたリム14のウエ
ル部14Aの外周面に回転可能に嵌合されている。中子組
立体10の外周面10Bは空気入りタイヤ12のクラウン部18
の内周面18Aのタイヤ幅方向中央部に対応している。As shown in FIG. 1, the core assembly 10 has an I-shaped cross section when viewed from the circumferential direction, and an inner peripheral surface 10A is formed on a rim 14 to which a bead portion 12A of the pneumatic tire 12 is fixed. Is rotatably fitted to the outer peripheral surface of the well portion 14A. The outer peripheral surface 10B of the core assembly 10 is a crown portion 18 of the pneumatic tire 12.
Corresponds to the center portion of the inner peripheral surface 18A in the tire width direction.
第３図及び第４図に示される如く、中子組立体10の内
周面10Aには、周方向に沿って周方向から見た断面形状
がＵ字状とされた周方向溝20、22が平行に形成されてい
る。この周方向溝20、22の深さ及び幅は、それぞれ2mm
とされており、周方向溝20、22内には潤滑剤としてのシ
リコンオイル24が充填されている。As shown in FIGS. 3 and 4, the inner circumferential surface 10A of the core assembly 10 has circumferential grooves 20 and 22 having a U-shaped cross section as viewed from the circumferential direction along the circumferential direction. Are formed in parallel. The depth and width of these circumferential grooves 20 and 22 are each 2 mm
The circumferential grooves 20, 22 are filled with silicone oil 24 as a lubricant.
次に本実施例の作用に付いて説明する。 Next, the operation of the present embodiment will be described.
本実施例においては、通常走行時中子組立体10は、内
周面10Aとリム14のウエル部14Aの外周面との摩擦によっ
てリム14と一体となって回転している。パンク等により
空気入りタイヤ12の内圧が低下すると、第２図に示され
る如く、空気入りタイヤ12は接地側（第２図の上側）に
おいて潰れ、クラウン部18の内周面18Aが中子組立体10
の外周面10Bに接触する。In the present embodiment, during normal running, the core assembly 10 rotates integrally with the rim 14 due to friction between the inner peripheral surface 10A and the outer peripheral surface of the well portion 14A of the rim 14. When the internal pressure of the pneumatic tire 12 decreases due to puncture or the like, as shown in FIG. 2, the pneumatic tire 12 is crushed on the ground contact side (upper side in FIG. 2), and the inner peripheral surface 18A of the crown portion 18 becomes a core set. 3D
Contacts the outer peripheral surface 10B of the
この時、中子組立体10は空気入りタイヤ12のクラウン
部18を内側から支持してその潰れを阻止し、内圧低下状
態における空気入りタイヤ12のランフラツトを可能にす
るとともに、空気入りタイヤ12から与えられた力により
リム14のウエル部14Aの外周面上を滑って回転し、空気
入りタイヤ12のクラウン部18の内周面18Aと、中子組立
体10の外周面10Bとの間の擦れを防止する。At this time, the core assembly 10 supports the crown portion 18 of the pneumatic tire 12 from the inside to prevent the crown portion 18 from being crushed, enables the run-flat of the pneumatic tire 12 in a state where the internal pressure is reduced, and allows the pneumatic tire 12 to The applied force slides on the outer peripheral surface of the well portion 14A of the rim 14 to rotate, and rubs between the inner peripheral surface 18A of the crown portion 18 of the pneumatic tire 12 and the outer peripheral surface 10B of the core assembly 10. To prevent
また、中子組立体10の内周面10Aの周方向溝20、22に
充填されたシリコンオイル24によって、中子組立体10の
内周面10Aとリム14のウエル部14Aの外周面との間の摩擦
抵抗が少なくなる。このため、内圧低下後に高荷重下で
高速走行しても中子組立体10のリム14のウエル部14Aと
の接触面が摩擦熱によって破損することなく比較的長距
離の走行ができる。In addition, the silicone oil 24 filled in the circumferential grooves 20 and 22 of the inner peripheral surface 10A of the core assembly 10 causes the inner peripheral surface 10A of the core assembly 10 and the outer peripheral surface of the well portion 14A of the rim 14 to move. The frictional resistance between them is reduced. For this reason, even if the core assembly 10 runs at high speed under a high load after the internal pressure is reduced, the core assembly 10 can run for a relatively long distance without the contact surface of the rim 14 with the well portion 14A being damaged by frictional heat.
また、周方向溝20、22溝は、幅方向に閉じていてラン
フラツト時にシリコンオイル24がタイヤ内部にこぼれる
のを防止している。The circumferential grooves 20 and 22 are closed in the width direction to prevent the silicon oil 24 from spilling into the tire during runflat.
なお、第１実施例のシリコンオイル24に代えて、周方
向溝20、22溝に潤滑剤としてグリース（混和ちょう度26
5〜295）を充填した中子組立体を第２実施例とする。In place of the silicone oil 24 of the first embodiment, grease (mixing consistency 26) is used as a lubricant in the circumferential grooves 20 and 22.
A core assembly filled with 5-295) is a second embodiment.
次に、本発明の第３実施例に付いて第５図に従って説
明する。Next, a third embodiment of the present invention will be described with reference to FIG.
なお、第１実施例と同一部材に付いては、同一符号を
付して説明を省略する。The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
第５図に示される如く、中子組立体10の内周面10Aに
形成され、周方向から見た断面形状がＵ字状の周方向溝
26、27の深さ及び幅は、それぞれ5mmとされており、こ
れらの周方向溝26、27にはグリース（混和ちょう度265
〜295）36が充填されている。As shown in FIG. 5, a circumferential groove formed in the inner peripheral surface 10A of the core assembly 10 and having a U-shaped cross section as viewed from the circumferential direction.
The depth and width of each of 26 and 27 are set to 5 mm, and the circumferential grooves 26 and 27 are grease (mixing penetration 265).
~ 295) 36 are filled.
次に、本発明の第４実施例に付いて第６図に従って説
明する。Next, a fourth embodiment of the present invention will be described with reference to FIG.
なお、第１実施例と同一部材に付いては、同一符号を
付して説明を省略する。The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
第６図に示される如く、中子組立体10の内周面10Aに
形成され、周方向から見た断面形状がＵ字状の周方向溝
28、29の深さ及び幅は、それぞれ5mmとされている。ま
たこれらの周方向溝28、29の間には、周方向に対して所
定角度傾斜し周方向から見た断面形状がＵ字状とされ、
深さ及び幅がそれぞれ5mmの横溝30が形成されており、
横溝30によって周方向溝28と同方向溝29とが互いに連結
されている。また、これらの周方向溝28、29及び横溝30
にはグリース36が充填されている。As shown in FIG. 6, a circumferential groove formed on the inner circumferential surface 10A of the core assembly 10 and having a U-shaped cross-section when viewed from the circumferential direction.
The depth and width of 28 and 29 are each 5 mm. Further, between these circumferential grooves 28 and 29, the cross-sectional shape viewed from the circumferential direction inclined at a predetermined angle with respect to the circumferential direction is U-shaped,
A horizontal groove 30 with a depth and width of 5 mm each is formed,
The circumferential groove 28 and the circumferential groove 29 are connected to each other by the lateral groove 30. In addition, these circumferential grooves 28 and 29 and the lateral grooves 30
Is filled with grease 36.
次に、本発明の第５実施例及び第６実施例に付いて第
７図に従って説明する。Next, a fifth embodiment and a sixth embodiment of the present invention will be described with reference to FIG.
なお、第１実施例と同一部材に付いては、同一符号を
付して説明を省略する。The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
第７図に示される如く、中子組立体10の内周面10Aに
形成され、周方向から見た断面形状がＵ字状の周方向溝
32、33の深さ及び幅は、それぞれ5mmとされている。ま
たこれらの周方向溝32、33からは幅方向内側へ向けて、
周方向に対して所定角度傾斜し周方向から見た断面形状
がＵ字状とされ、深さ及び幅がそれぞれ5mmとされた横
溝34、35が形成されており、これらの周方向溝32、33及
び横溝34、35にはそれぞれグリース36が充填されてい
る。As shown in FIG. 7, a circumferential groove formed on the inner circumferential surface 10A of the core assembly 10 and having a U-shaped cross-section when viewed from the circumferential direction.
The depth and width of 32 and 33 are each 5 mm. Also, from these circumferential grooves 32, 33, inward in the width direction,
The cross-sectional shape viewed from the circumferential direction inclined at a predetermined angle with respect to the circumferential direction is U-shaped, and horizontal grooves 34 and 35 having a depth and a width of 5 mm are formed, and these circumferential grooves 32 and 35 are formed. The grease 36 is filled in the 33 and the lateral grooves 34 and 35, respectively.
次に、本発明の第７実施例に付いて第８図及び第９図
に従って説明する。Next, a seventh embodiment of the present invention will be described with reference to FIGS.
なお、第１実施例と同一部材に付いては、同一符号を
付して説明を省略する。The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
第８図に示される如く、中子組立体10の内周面10Aに
は、周方向に沿ってシート40が固着されている。第９図
に示される如く、シート40の幅方向両端部40A、40Bは、
それぞれ中子組立体10の内周面10Aの幅方向両端部に接
着されており、周方向溝28、29及び横溝30に充填された
グリース36を密閉している。As shown in FIG. 8, a sheet 40 is fixed to the inner peripheral surface 10A of the core assembly 10 along the circumferential direction. As shown in FIG. 9, both ends 40A and 40B in the width direction of the sheet 40 are
Each is bonded to both ends in the width direction of the inner peripheral surface 10A of the core assembly 10, and seals the grease 36 filled in the circumferential grooves 28, 29 and the lateral grooves 30.
このため、通常内圧での走行時にグリース36が空気入
りタイヤ内部にこぼれたり劣化したりするのを防止する
ことができる。またランフラツト時には、このシート40
が破れグリース36によって中子組立体10の内周面10Aと
リム14のウエル部14Aの外周面との間の摩擦抵抗を少な
くできる。For this reason, it is possible to prevent the grease 36 from spilling or deteriorating inside the pneumatic tire during traveling at normal internal pressure. At the time of runflat, this sheet 40
The grease 36 can reduce the frictional resistance between the inner peripheral surface 10A of the core assembly 10 and the outer peripheral surface of the well portion 14A of the rim 14.
次に、本発明の第８実施例に付いて第10図及び第11図
に従って説明する。Next, an eighth embodiment of the present invention will be described with reference to FIGS.
なお、第１実施例と同一部材に付いては、同一符号を
付して説明を省略する。The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
第10図に示される如く、中子組立体10の内周面10Aの
幅方向両端部には、中子組立体10の周方向に沿って配置
された袋42の幅方向両端部42A、42Bがそれぞれ固着され
ている。第11図に示される如く、袋42は外周部43と内周
部44とによって構成されており、それぞれの幅方向両端
部が互い固着されている。これらの外周部43と内周部44
との間には、グリース36が密閉されている。As shown in FIG. 10, at both ends in the width direction of the inner peripheral surface 10A of the core assembly 10, width direction both ends 42A, 42B of the bag 42 arranged along the circumferential direction of the core assembly 10. Are respectively fixed. As shown in FIG. 11, the bag 42 includes an outer peripheral portion 43 and an inner peripheral portion 44, and both ends in the width direction are fixed to each other. These outer peripheral portion 43 and inner peripheral portion 44
The grease 36 is hermetically sealed between them.
このため、通常内圧での走行時にグリース36が空気入
りタイヤ内部にこぼれたり劣化したりするのを防止する
ことができる。またランフラツト時には、この袋42が破
れグリース36によって中子組立体10の内周面10Aとリム1
4のウエル部14Aの外周面との間の摩擦抵抗を少なくでき
る。For this reason, it is possible to prevent the grease 36 from spilling or deteriorating inside the pneumatic tire during traveling at normal internal pressure. Also, at the time of runflat, the bag 42 is torn and the grease 36 causes the inner peripheral surface 10A of the core assembly 10 and the rim 1 to break.
The frictional resistance between the fourth well portion 14A and the outer peripheral surface can be reduced.
（実験例１） 空気入りタイヤ（サイズは195/70R14であり、リムの
サイズは5.5J）に、比較例１、比較例２及び第１実施例
〜第５実施例の中子組立体を装着し、一週間程放置した
後、車両に取り付けて試験した。車両装着位置は前輪左
側とした。中子組立体をタイヤに組み通常内圧（2.0kg/
cm2）で速度60〜100km/hで50km程度の慣らし走行を行っ
た後、内圧を0kg/cm2にして正規荷重の0.8倍の荷重を作
用させながら速度60km/hで一般路を走行させ、タイヤも
しくは中子組立体が故障するまでの距離を測定した。そ
の結果を第１表に示す。(Experimental example 1) Comparative example 1, Comparative example 2, and the core assembly of the first to fifth examples are mounted on a pneumatic tire (size is 195 / 70R14, rim size is 5.5J). After leaving it for about a week, it was attached to a vehicle and tested. The vehicle was mounted on the left front wheel. The core assembly is assembled into a tire and the normal internal pressure (2.0kg /
cm 2) after 50km about break traveling at a speed 60~100km / h, the allowed to run general road at a speed 60 km / h while applying a 0.8-fold weight of normal load to the internal pressure 0 kg / cm 2 The distance until the tire or core assembly failed was measured. Table 1 shows the results.
この結果、本発明を適用した第１実施例〜第５実施例
では故障までの距離、すなわちランフラツト距離が比較
例１及び比較例２より向上している。また、潤滑剤は混
和ちょう度が295以下のグーリスが好ましいく、潤滑剤
の効果の持続性を考えるとスピンドル油やシリコンオイ
ルは好ましくない。As a result, in the first to fifth embodiments to which the present invention is applied, the distance to the failure, that is, the ranflat distance is improved compared to the first and second comparative examples. Further, the lubricant is preferably a grease having a penetration consistency of 295 or less, and spindle oil or silicone oil is not preferred in view of the durability of the effect of the lubricant.
（実験例２） 空気入りタイヤ（サイズは195/70R14であり、リムの
サイズは5.5J）に、第６実施例〜第８実施例の中子組立
体を装着し、中子組立体をリムに組み通常内圧（2.0kg/
cm2）での走行を１年（25000km程度）した後、内圧を0k
g/cm2にして正規荷重の0.8倍の荷重を作用させながら速
度60km/hで一般路を走行させ、空気入りタイヤもしくは
中子組立体が故障するまでの距離を測定した。この結果
を第２表に示す。 (Experimental Example 2) The core assemblies of the sixth to eighth embodiments are mounted on a pneumatic tire (size is 195 / 70R14, rim size is 5.5 J), and the core assembly is mounted on the rim. Normal internal pressure (2.0kg /
cm 2 ) after one year (about 25,000 km)
The vehicle was run on a general road at a speed of 60 km / h while applying a load 0.8 times the normal load at g / cm 2 , and the distance until the pneumatic tire or the core assembly failed was measured. Table 2 shows the results.
この結果、グリースを密閉しなかった第６実施例よ
り、グリースを密閉した第７実施例及び第８実施例は故
障までの距離、すなわちランフラツト距離が格段に向上
している。As a result, in the seventh embodiment and the eighth embodiment in which the grease is sealed, the distance to the failure, that is, the ranflat distance is remarkably improved compared to the sixth embodiment in which the grease is not sealed.
なお、中子組立体10の内周面10Aに形成される溝の周
方向に沿った形状は、第12図（Ａ）〜（Ｄ）に示される
ような形状でもよく、また溝の周方向から見た断面形状
は第13図（Ａ）〜（Ｅ）に示されるような形状でもよ
い。 The shape of the groove formed on the inner peripheral surface 10A of the core assembly 10 along the circumferential direction may be as shown in FIGS. 12 (A) to 12 (D). 13 (A) to 13 (E).
本発明は上記の構成としたので、中子組立体の内周面
とリムのウエル部との接触面の摩擦熱を低減でき、比較
的長距離の走行を可能にできるという優れた効果を有す
る。Since the present invention is configured as described above, the frictional heat of the contact surface between the inner peripheral surface of the core assembly and the well portion of the rim can be reduced, and has an excellent effect of enabling relatively long distance running. .
第１図は本発明の第１実施例の空気入りタイヤ用中子組
立体が装着された空気入りタイヤを示すタイヤ軸方向に
沿って切断した断面図、第２図は本発明の第１実施例の
空気入りタイヤ用中子組立体が装着された空気入りタイ
ヤのランフラツト状態を示すタイヤ軸方向に沿って切断
した断面図、第３図は本発明の第１実施例の空気入りタ
イヤ用中子組立体の一部を示すタイヤ軸方向から見た側
面図、第４図は本発明の第１実施例の空気入りタイヤ用
中子組立体の一部を示す半径方向から見た平面図、第５
図は本発明の第３実施例の空気入りタイヤ用中子組立体
の一部を示す半径方向から見た平面図、第６図は本発明
の第４実施例の空気入りタイヤ用中子組立体の一部を示
す半径方向から見た平面図、第７図は本発明の第５実施
例及び第６実施例の空気入りタイヤ用中子組立体の一部
を示す半径方向から見た平面図、第８図は本発明の第７
実施例の空気入りタイヤ用中子組立体の一部を示すタイ
ヤ軸方向から見た側面図、第９図は第８図IX−IX線断面
図、第10図は本発明の第８実施例の空気入りタイヤ用中
子組立体の一部を示すタイヤ軸方向から見た側面図、第
11図は第10図XI−XI線断面図、第12図（Ａ）〜第12図
（Ｄ）は本発明の他の実施例の空気入りタイヤ用中子組
立体の一部を示す半径方向から見た平面図、第13図
（Ａ）〜第13図（Ｅ）は本発明の他の実施例の空気入り
タイヤ用中子組立体の溝を示す周方向から見た断面図で
ある。 10……中子組立体、 12……空気入りタイヤ、 14……リム、 14A……ウエル部、 20、22、26、27、28、29、32、33……周方向溝、 24……シリコンオイル、 30、34、35……横溝、 36……グリース。FIG. 1 is a cross-sectional view of a pneumatic tire on which a core assembly for a pneumatic tire according to a first embodiment of the present invention is mounted, taken along a tire axial direction, and FIG. 2 is a first embodiment of the present invention. FIG. 3 is a sectional view of the pneumatic tire on which the core assembly for a pneumatic tire according to the example is mounted, taken along a tire axial direction, showing a runflat state. FIG. 3 is a sectional view of the pneumatic tire according to the first embodiment of the present invention. FIG. 4 is a side view showing a part of the child assembly viewed from the tire axial direction, FIG. 4 is a plan view showing a part of the core assembly for a pneumatic tire of the first embodiment of the present invention seen from the radial direction, Fifth
FIG. 6 is a plan view showing a part of a core assembly for a pneumatic tire according to a third embodiment of the present invention as viewed from the radial direction. FIG. 6 is a core set for a pneumatic tire according to a fourth embodiment of the present invention. FIG. 7 is a radial plan view showing a part of a three-dimensional structure, and FIG. 7 is a radial plan view showing a part of a pneumatic tire core assembly according to a fifth embodiment and a sixth embodiment of the present invention. FIG. 8 shows the seventh embodiment of the present invention.
FIG. 9 is a side view of a part of the core assembly for a pneumatic tire as viewed from the tire axial direction, FIG. 9 is a sectional view taken along the line IX-IX of FIG. 8, and FIG. 10 is an eighth embodiment of the present invention. Side view, viewed from the tire axial direction, showing a part of a core assembly for a pneumatic tire,
FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10, and FIGS. 12 (A) to 12 (D) are radial directions showing a part of a pneumatic tire core assembly according to another embodiment of the present invention. 13 (A) to 13 (E) are cross-sectional views showing grooves of a core assembly for a pneumatic tire according to another embodiment of the present invention as viewed from the circumferential direction. 10 ... core assembly, 12 ... pneumatic tire, 14 ... rim, 14A ... well, 20, 22, 26, 27, 28, 29, 32, 33 ... circumferential groove, 24 ... Silicon oil, 30, 34, 35… horizontal groove, 36… grease.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B60C 17/10 B60C 17/04──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) B60C 17/10 B60C 17/04
Claims (1)
た２個以上の弧状体の各端部を重ね合わせて連結するこ
とにより環状に組立られるとともに空気入りタイヤを装
着したリムのウエル部外周面に嵌合され空気入りタイヤ
が内圧低下により潰れた場合に外周面が空気入りタイヤ
のクラウン部内周面と接触し内周面がウエル部外周面上
を滑って回転する空気入りタイヤ用中子組立体であっ
て、内周面に形成された溝と、内周面とリムのウエル部
外周面との間に充填された潤滑剤と、有することを特徴
とする空気入りタイヤ用中子組立体。1. An outer peripheral surface of a well portion of a rim on which a pneumatic tire is mounted while being annularly assembled by overlapping and connecting respective ends of two or more arc-shaped bodies at least partially formed of an elastic material. When the pneumatic tire is crushed due to a decrease in internal pressure, the outer peripheral surface comes into contact with the inner peripheral surface of the crown portion of the pneumatic tire, and the inner peripheral surface slides on the outer peripheral surface of the well portion to rotate, and the core set for the pneumatic tire rotates. A three-dimensional core assembly for a pneumatic tire, comprising: a groove formed on an inner peripheral surface; and a lubricant filled between the inner peripheral surface and an outer peripheral surface of a well portion of the rim. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1261079A JP2815929B2 (en) | 1989-10-05 | 1989-10-05 | Core assembly for pneumatic tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1261079A JP2815929B2 (en) | 1989-10-05 | 1989-10-05 | Core assembly for pneumatic tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03121913A JPH03121913A (en) | 1991-05-23 |
| JP2815929B2 true JP2815929B2 (en) | 1998-10-27 |
Family
ID=17356790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1261079A Expired - Fee Related JP2815929B2 (en) | 1989-10-05 | 1989-10-05 | Core assembly for pneumatic tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2815929B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0481308A (en) * | 1990-07-23 | 1992-03-16 | Bridgestone Corp | Core assembling member for pneumatic tire |
| KR100612768B1 (en) * | 2002-05-28 | 2006-08-21 | 토피 고교 가부시키가이샤 | Run-flat core |
| JP4547473B2 (en) | 2004-03-01 | 2010-09-22 | 株式会社ブリヂストン | Tire rim assembly puncture tire monitoring and repair system |
| JP5395526B2 (en) * | 2009-06-12 | 2014-01-22 | 住友ゴム工業株式会社 | Run-flat tire assembly and support ring used therefor |
| CN105034711B (en) * | 2015-08-20 | 2017-02-22 | 资义勇 | Tire burst protective ring for tubeless tire |
-
1989
- 1989-10-05 JP JP1261079A patent/JP2815929B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03121913A (en) | 1991-05-23 |
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