WO2012114964A1 - チューブタイヤ用のフラップ - Google Patents
チューブタイヤ用のフラップ Download PDFInfo
- Publication number
- WO2012114964A1 WO2012114964A1 PCT/JP2012/053571 JP2012053571W WO2012114964A1 WO 2012114964 A1 WO2012114964 A1 WO 2012114964A1 JP 2012053571 W JP2012053571 W JP 2012053571W WO 2012114964 A1 WO2012114964 A1 WO 2012114964A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flap
- tube
- rubber
- rubber material
- rim
- Prior art date
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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
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
-
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/02—Seating or securing beads on rims
- B60C15/028—Spacers between beads
-
- 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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
-
- 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
- B60C29/00—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for
- B60C29/06—Accessories for tyre-inflating valves, e.g. housings, guards, covers for valve caps, locks, not otherwise provided for
- B60C29/064—Hose connections for pneumatic tyres, e.g. to spare wheels
Definitions
- the present invention relates to a flap for a tube tire. More specifically, the present invention relates to a flap for a tube tire that can improve the durability of the flap and prevent puncture of the tube.
- a flap made of an annular rubber is attached to the outer peripheral surface of the rim.
- the flap has a valve hole so that the valve of the tube can be inserted, and the valve hole is positioned so as to overlap the valve hole of the rim.
- Tube tires used for trucks, buses, etc. have an originally high internal pressure of the tube, and when the loaded weight is heavy, the internal pressure of the tube is further increased.
- the flap and a part of the tube may bulge from the valve hole of the rim.
- cracks and bites occur in the tube that bulges together with the flap, which can damage the tube and even puncture it.
- Patent Document 2 it has been proposed to reinforce by reinforcing rubber mixed with short fibers around the valve hole on the outer peripheral side of the flap, that is, on the side facing the tube.
- Patent Document 3 a reinforcing material that is vulcanized for the first time in the stage of being integrally formed with the flap body is provided in the vicinity of the valve hole on the side of the flap facing the tube.
- Patent Document 4 it has been proposed to reinforce by providing a fiber layer made of fibers and rubber on the side of the flap that contacts the rim.
- the flap to which the reinforcing material described in Patent Documents 2 to 4 is applied can reinforce the periphery of the valve hole of the flap, and can suppress damage to the tube to some extent.
- the demand for tube damage suppression is unavoidable, and it is required to further improve the tube damage suppression effect.
- the height of the bulge of the flap and tube rim from the valve hole correlates with the tube internal pressure of the tube tire, and is described in Patent Documents 2 to 4 due to an increase in load capacity due to an increase in truck size and overloading. Even with this technique, the tube may be damaged.
- the present invention advantageously solves the above-described problems, and an object of the present invention is to provide a flap for a tube tire that can reinforce the periphery of the valve hole of the flap and further suppress the damage to the tube.
- the flap for a tube tire of the present invention is made of an annular rubber attached to the outer peripheral surface of a rim for the tube tire, and has a flap base having a valve hole through which the valve of the tube can be inserted, and faces the tube of the flap base.
- the first reinforcing member made of rubber is provided around the valve hole on the peripheral surface of the side, and the rubber is provided around the valve hole on the peripheral surface facing the rim of the flap base, and the cord is embedded And a second reinforcing member.
- the first reinforcing member is made of the same rubber material as that of the flap base.
- the first reinforcing member has a sheet shape, and can be configured such that the size of the surface in contact with the flap base is larger than the size of the surface facing the tube, and the side surface of the first reinforcing member. More preferably, the angle formed by the surface contacting the flap base is less than 45 °. Still further, it is preferable that the first reinforcing member and the second reinforcing member have the same size in contact with the flap base.
- the side facing the tube and the surface facing the tube refer to the side and the surface of the first reinforcing member (rubber material of the embodiment described later) disposed between the tube and the flap base.
- the side facing the rim and the surface facing the rim refer to the side and the surface of the second reinforcing member (cord reinforcing rubber material of an embodiment described later) disposed between the rim and the flap base.
- the reinforcing member is provided on each of the peripheral surface facing the tube and the peripheral surface facing the rim in the flap base, the reinforcing effect by the reinforcing member can be improved. It becomes possible to further suppress the damage to the tube.
- FIG. 1 is a schematic cross-sectional view of a tire-rim assembly to which a flap according to an embodiment of the present invention is attached. It is a partial perspective view of the flap of one embodiment of the present invention. It is the top view and partial sectional view of a rubber material. It is the top view and sectional drawing of a cord reinforcement rubber material. It is a graph which shows a time-dependent change of rubber rising height. It is typical sectional drawing which shows the rubber rising state of a comparative example.
- the tire body T10 includes a pair of bead portions T11, a pair of sidewall portions T12, and a tread portion T13 straddling the sidewall portions T12. It has. Further, a hollow tube t is accommodated in the tire body T10, and a valve b is attached to the tube t. Air is pressurized and filled from this valve, and the inside of the tube is set to a predetermined air pressure (for example, 4 kg / cm 2 to 7 kg / cm 2 ). The tire body T10 that houses the tube t is attached to the rim r.
- the flap 10 is attached to the rim r along the outer peripheral surface thereof.
- the flap 10 includes an annular flap base 11 made of rubber, a rubber member 12 as a first reinforcing member fixed to the surface of the flap base 11, and a cord reinforcing rubber member 13 as a second reinforcing member.
- the flap base 11 is formed with a rubber hole 11a into which the valve b can be inserted.
- the rubber material 12 is fixed to the peripheral surface 11b around the rubber hole 11a and facing the tube t of the flap base 11, and the cord reinforcing rubber material 13 is fixed to the peripheral surface 11c facing the rim r. Is fixed.
- the flap base 11 includes a base portion 11d along the outer periphery of the rim r, and a wing portion connected to the end portion of the base portion and along the inner surface of the bead portion T11 of the tire T10. 11e.
- FIG. 3 The rubber material 12 fixed to the peripheral surface 11b on the side of the flap base 11 facing the tube t is shown in FIG. 3 in a plan view (FIG. 3 (a)) and a partial cross-sectional view (FIG. 3 (b)).
- the four sides of the upper surface of the rectangular parallelepiped are chamfered and have a quadrangular frustum shape.
- a valve hole 12 a that is concentric with the valve hole 11 a of the flap base 11 is formed in the rubber material 12.
- the cord reinforcing rubber material 13 fixed to the peripheral surface 11c on the side facing the rim r of the flap base 11 is shown in FIG. 4 as a plan view (FIG. )), A rubber sheet having a rectangular parallelepiped shape, and a valve hole 13a concentric with the valve hole 11a of the flap base 11 is formed in the cord reinforcing rubber material 13.
- the cord reinforcing rubber material 13 A plurality of cords 13b are embedded in the rubber member 12.
- the material of the rubber material 12 can be a rubber different from the material of the tube t, but is preferably the same rubber as the material of the tube t. .
- the flap 10 of this embodiment shown in FIGS. 1 to 4 has a rubber material 12 fixed to one surface and a cord reinforcing rubber material 13 fixed to the other surface around the valve hole 11a of the flap base 11. Therefore, the periphery of the valve hole 11a of the flap base 11 is reinforced by the rubber material 12 and the cord reinforcing rubber material 13 from both sides. Thereby, the rigidity of the reinforcing member is increased, the deformation of the flap base 11 due to the internal pressure of the tube is suppressed, and the tube t together with the flap 10 is further suppressed from bulging from the valve hole of the rim r. Therefore, the damage suppression of the tube t can be further improved.
- the rubber material 12 is preferably made of plain rubber, not a cord-reinforced rubber material in which a cord is embedded. If the rubber material 12 is a cord-reinforced rubber material, the surface roughness of the surface in contact with the tube t in the rubber material 12 becomes rough by covering the cord with rubber. Thus, when the surface roughness of the surface in contact with the tube t is rough, the tube t may be damaged due to friction with the tube t. Therefore, the rubber material 12 is preferably made of plain rubber as described above. In addition, it is preferable that the rubber material 12 is made of the same rubber material as that of the tube t because damage to the tube t due to friction with the rubber material 12 can be further suppressed.
- the rubber material 12 preferably has a shape in which the area of the surface in contact with the flap base 11 is larger than the area of the surface facing the tube t as shown in FIGS.
- the reason is that the surface of the rubber material 12 that contacts the tube t is preferably smaller in area in order to reduce damage to the tube t due to friction with the rubber material 12, and is fixed to the flap base 11. This is because a larger bonding area is preferable in order to sufficiently secure the adhesive force with the flap base 11.
- the shape of the rubber material 12 that satisfies the requirements for the size of the surface includes a quadrangular frustum shape shown in FIGS. 2 and 3, but is not limited to the quadrangular frustum shape. For example, there is a shape in which four sides of the upper surface of a rectangular parallelepiped sheet are chamfered. This chamfering may be C chamfering or R chamfering.
- the rubber material 12 has a quadrangular frustum shape or a shape obtained by chamfering the four sides of the upper surface of the rectangular parallelepiped, an angle formed between the side surface and a surface in contact with the flap base, or a surface in contact with the wrap base and the chamfered surface
- the angle ( ⁇ shown in FIG. 3) formed with the parallel surface is less than 45 °, both the prevention of damage to the tube t and the maintenance of the adhesion of the rubber material 11 to the flap base 11 are achieved at a high level. Therefore, it is more preferable.
- planar shape of the upper surface and the lower surface of the rubber material 12 is a rectangle in the example shown in FIGS. 2 and 3, but is not limited to a rectangle, and if the shape surrounds the valve hole 11 a, the planar shape is Various planar shapes such as a circle and an oval can be taken.
- the cord-reinforced rubber material 13 fixed to the flap base 11 on the side in contact with the rim r is in the form of a sheet and can be a rectangular parallelepiped.
- the cord reinforcing rubber material 13 may have a quadrangular pyramid shape or a shape in which the four sides of the upper surface of the rectangular parallelepiped are chamfered. Therefore, regardless of the size of the surface in contact with the rim, there is no relation to the damage of the tube t, and the rim is not damaged. Therefore, it is preferable that the cord reinforcing rubber material 13 has a rectangular parallelepiped shape with the sheet punched out because the cord reinforcing rubber material 13 is easy to produce.
- the cord reinforcing rubber material 13 can be a treat in which a plurality of cords are driven at a predetermined interval. Since the cord reinforced rubber material 13 is reinforced by the cord, the rigidity and strength of the cord reinforced rubber material 13 are improved, and thereby the flap base around the valve hole 11a by the cord reinforced rubber material 13 11 has a high reinforcing effect.
- the cord of the cord-reinforced rubber material 1, organic fibers can be used, and steel fibers can also be used.
- the cord structure, the cord diameter, the cord interval, the number of cords to be driven, and the like can be set to appropriate values according to a desired reinforcing effect.
- the size of the cord reinforcing rubber material 13 and the rubber material 12 is excellent in the rigidity balance and weight balance of the flap 10 by comparing the surfaces contacting the flap base 11 with the same planar shape and the same area. This is preferable.
- the means for fixing the rubber material 12 and the cord reinforcing rubber material 13 to the flap base 11 is not limited, and for example, they are firmly fixed by vulcanization molding integrally. Further, it can be fixed using a known adhesive such as rubber cement before vulcanization molding or without vulcanization molding.
- flaps 3 types were prepared.
- One is a flap in which a rubber material 12 is fixed to the tube facing surface side of the flap base 11 and a cord-reinforced rubber material 13 is fixed to the rim facing surface side by vulcanization molding or adhesive according to the present invention (Example).
- One is a flap in which a cord reinforcing rubber material 13 is fixed as a reinforcing member only on the rim facing surface side of the flap base 11 (Comparative Example 1).
- the other is a flap in which neither the rubber material 12 nor the cord reinforcing rubber material 13 is disposed (Comparative Example 2).
- the size of these flaps was standardized by the flaps of the lapping method.
- the rubber material 12 of the flap of the example is made of the same material as the tube t and has a quadrangular frustum shape as shown in FIG.
- the size is 2.5 mm
- the width of the surface in contact with the flap base 11 (the length in the direction parallel to the rim width direction) is 91 mm
- the length (the length in the direction parallel to the circumferential direction of the rim).
- the width of the surface facing the tube was 85 mm
- the length was 70 mm
- the angle formed between the side surface and the lower surface was 45 °.
- the cord reinforced rubber material 13 of the flap in the embodiment has the same length and width as the rubber material 12 in contact with the flap base 11, and has a thickness of 1.09 to 1.39 mm. It was the rectangular parallelepiped shape shown.
- the cord had a cord structure made of polyester (1670 dtex ⁇ 2 strands), a cord diameter of 0.66 mm, and a cord interval of 0.3 to 0.4 mm.
- the cord reinforcement rubber material 13 of the comparative example 1 is the same as the cord reinforcement rubber material 13 of the said Example.
- FIG. 5 is a graph showing the change over time of the rubber bulge height. As can be seen from FIG. 5, the rubber flaps of the examples had much less rubber bulges than Comparative Examples 1 and 2.
- FIG. 6 is a schematic cross-sectional view showing the rubber swell state of Comparative Example 2. In the flap 110 shown in the figure, a rubber bulge 110a occurs at the valve hole ra portion of the rim r.
- flap 11 flap base 11a: valve hole 12: rubber material (first reinforcing member) 13: Cord reinforcing rubber material (second reinforcing member) T10: tire body t: tube r: rim
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
ここで、チューブと対向する側、チューブと対向する面とは、チューブとフラップ基体との間に配置されている第1の補強部材(後述する実施形態のゴム材)の側及び面をいい、リムと対向する側、リムと対向する面とは、リムとフラップ基体との間に配置されている第2の補強部材(後述する実施形態のコード補強ゴム材)の側及び面をいう。
図1に示す、タイヤ-リム組立体の模式的な断面図において、タイヤ本体T10は、一対のビード部T11と、一対のサイドウォール部T12と、これらのサイドウォール部T12を跨ぐトレッド部T13とを備えている。また、タイヤ本体T10の内部には、中空のチューブtが収容されていて、このチューブtにバルブbが取り付けられている。このバルブから空気が加圧充填されて、チューブ内を所定の空気圧(例えば、4kg/cm2~7kg/cm2)としている。チューブtを収容したタイヤ本体T10は、リムrに取り付けられる。
なお、比較例1のコード補強ゴム材13は、上記実施例のコード補強ゴム材13と同じである。
図5から分かるように、実施例のフラップは、ゴム盛り上がりが比較例1、2に比べて格段に少なかった。
比較例2のゴム盛り上がり状態を模式的な断面図で図6に示す。図に示すフラップ110は、リムrのバルブ孔ra部分でゴム盛り上がり110aが生じていた。
11:フラップ基体
11a:バルブ孔
12:ゴム材(第1の補強部材)
13:コード補強ゴム材(第2の補強部材)
T10:タイヤ本体
t:チューブ
r:リム
Claims (5)
- チューブタイヤ用のリムの外周面に取り付けられる環状のゴムよりなり、チューブのバルブを挿通可能なバルブ孔を有するフラップ基体と、
このフラップ基体のチューブと対向する側の周面におけるバルブ孔の周囲に設けられ、ゴムよりなる第1の補強部材と、
このフラップ基体のリムと対向する側の周面におけるバルブ孔の周囲に設けられ、コードが埋設されたゴムよりなる第2の補強部材と
を備えることを特徴とするチューブタイヤ用のフラップ。 - 前記第1の補強部材は、前記フラップ基体と同じゴム材料よりなる請求項1記載のチューブタイヤ用のフラップ。
- 前記第1の補強部材は,シート状であり、チューブと対向する面の大きさよりも、フラップ基体に接する面の大きさが大きい請求項1に記載のチューブタイヤ用のフラップ。
- 前記第1の補強部材は、その側面とフラップ基体に接する面とのなす角度が45°未満である請求項1記載のチューブタイヤ用のフラップ。
- 前記第1の補強部材及び前記第2の補強部材は、フラップ基体に接する面が同じ大きさを有する請求項1記載のチューブタイヤ用のフラップ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013500982A JP6078462B2 (ja) | 2011-02-21 | 2012-02-15 | チューブタイヤ用のフラップ |
CN2012800096728A CN103380010A (zh) | 2011-02-21 | 2012-02-15 | 有内胎轮胎用的挡板 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-035054 | 2011-02-21 | ||
JP2011035054 | 2011-02-21 |
Publications (1)
Publication Number | Publication Date |
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WO2012114964A1 true WO2012114964A1 (ja) | 2012-08-30 |
Family
ID=46720746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/053571 WO2012114964A1 (ja) | 2011-02-21 | 2012-02-15 | チューブタイヤ用のフラップ |
Country Status (3)
Country | Link |
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JP (1) | JP6078462B2 (ja) |
CN (1) | CN103380010A (ja) |
WO (1) | WO2012114964A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3330107A1 (de) * | 2016-11-25 | 2018-06-06 | Continental Reifen Deutschland GmbH | Dichtring für ein fahrzeugrad |
CN110435164A (zh) * | 2019-07-19 | 2019-11-12 | 中国工程物理研究院化工材料研究所 | 一种降低脆性材料开孔结构应力集中的方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106143000B (zh) * | 2016-08-27 | 2018-02-23 | 厦门正新橡胶工业有限公司 | 免垫带充气轮胎 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49104807U (ja) * | 1972-12-29 | 1974-09-09 | ||
JPS60124505A (ja) * | 1983-12-12 | 1985-07-03 | Yokohama Rubber Co Ltd:The | 自動車タイヤ用フラップ |
JPS635933A (ja) * | 1986-06-26 | 1988-01-11 | Bridgestone Corp | タイヤ用フラップの製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH055505U (ja) * | 1991-07-09 | 1993-01-26 | 東洋ゴム工業株式会社 | 空気入りタイヤの補強フラツプ |
JPH06115304A (ja) * | 1992-10-07 | 1994-04-26 | Sumitomo Rubber Ind Ltd | タイヤ用フラップ |
JPH06143910A (ja) * | 1992-11-13 | 1994-05-24 | Sumitomo Rubber Ind Ltd | タイヤ用のフラップ |
JPH09118107A (ja) * | 1995-10-26 | 1997-05-06 | Bridgestone Corp | タイヤ用フラップとその製造方法とバルブ口部用型物 |
JP2009214834A (ja) * | 2008-03-12 | 2009-09-24 | Bridgestone Corp | タイヤ用フラップ |
-
2012
- 2012-02-15 WO PCT/JP2012/053571 patent/WO2012114964A1/ja active Application Filing
- 2012-02-15 JP JP2013500982A patent/JP6078462B2/ja not_active Expired - Fee Related
- 2012-02-15 CN CN2012800096728A patent/CN103380010A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49104807U (ja) * | 1972-12-29 | 1974-09-09 | ||
JPS60124505A (ja) * | 1983-12-12 | 1985-07-03 | Yokohama Rubber Co Ltd:The | 自動車タイヤ用フラップ |
JPS635933A (ja) * | 1986-06-26 | 1988-01-11 | Bridgestone Corp | タイヤ用フラップの製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3330107A1 (de) * | 2016-11-25 | 2018-06-06 | Continental Reifen Deutschland GmbH | Dichtring für ein fahrzeugrad |
CN110435164A (zh) * | 2019-07-19 | 2019-11-12 | 中国工程物理研究院化工材料研究所 | 一种降低脆性材料开孔结构应力集中的方法 |
CN110435164B (zh) * | 2019-07-19 | 2024-05-14 | 中国工程物理研究院化工材料研究所 | 一种降低脆性材料开孔结构应力集中的方法及其结构 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2012114964A1 (ja) | 2014-07-07 |
JP6078462B2 (ja) | 2017-02-08 |
CN103380010A (zh) | 2013-10-30 |
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